52results about How to "Avoid situations of severe stress" patented technology

An excavation-convenient geological sample drilling device includes a power auger head apparatus (5) used for drilling and collecting a sample in a narrow gap (10) in a geologic body (1), and a fixing rack (2) being installed fixedly on the geologic body (1). The upper side of the power auger head apparatus (5) is fixedly connected to the lower end of a lift-driven external thread member (44). An external thread is formed on periphery of the lift-driven external thread member (44) and is matched with an internal thread in a gear thread member (41) which is driven by a driving gear (43) and is rotatably installed in the fixing rack (2). A sliding groove (40) which is axially extended is disposed in an inner periphery of the lift-driven external thread member (44) and is matched with a radial extended part (35) in an axially slidable and circumferentially fixed manner, wherein the radial extended part (35) is fixedly connected to the lower end of a connection rod (34) which can pass through an inner chamber in the lift-driven external thread member (44).

The invention relates to a lift type gate device for hydraulic engineering. The lift type gate device for the hydraulic engineering comprises a gate lifting plate which is used for opening and closing a gate in a wall body and a fixed rack which is fixedly arranged on the wall body, wherein the upper side of the gate lifting plate is fixedly connected with the lower end of a lifting driving threaded sleeve, an external thread is arranged on the outer circumference of the lifting driving threaded sleeve and used for being in fit with an internal thread which is formed in a lower driving gear which is meshed with the lower driving gear and rotatably arranged in the fixed rack, the lower driving gear is driven by a lower driving motor fixedly arranged in a cavity of the fixed rack, a sliding slot axially extending is formed in the inner circumference of the lifting driving threaded sleeve and used for enabling a radial extending part fixedly connected at the lower end part of a threaded rod which can penetrate through the inner cavity of the lifting driving threaded sleeve to axially slide and being in circumferential and fixed fit with the radial extending part.

A stable and reliable lifting type water conservancy gate structure comprises a gate lifting plate (5) used for opening and closing a sluice gate (15) between walls (1), and a fixed rack (2) fixedly mounted on the walls (1). The upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting-driving threaded sleeve (44), an external thread is arranged on the outer circumferential face of the lifting-driving threaded sleeve (44) and used for being matched with an internal thread of a lower driving threaded part (41) which is rotatably mounted in the fixed rack (2) and driven by a lower driving worm (43), and an axial-extending sliding groove (40) is formed in the inner circumferential face of the lifting-driving threaded sleeve (44) and used for being matched with a radial extending part (35) in axial-sliding and circumferential-fixing modes; and the radial extending part (35) is fixedly connected with the lower end of a threaded rod (34) which can penetrate through an inner cavity of the lifting-driving threaded sleeve (44).

The invention discloses a novel mineral product sampling device. The device comprises a dynamic auger bit device (5) for drilling to take a sample in a slit (10) in a geological body (1) and a fixed frame (2) fixedly installed on the geological body (1). The upper side of the dynamic auger bit device (5) is fixedly connected to the lower end of a lifting driving external thread element (44). The periphery of the lifting driving external thread element (44) is provided with external threads for fitting to internal threads in a gear thread element (41) which is rotatingly installed in the fixed frame (2) and is driven by a driving gear (43). The inner circumferential surface of the lifting driving external thread element (44) is provided with an axially extending chute (40) for axially slidingly and circumferentially fixedly fitting to a radial extension part (35) fixedly connected to the lower end of a connection rod (34) going through the inner cavity of the lifting driving external thread element (44).

The invention relates to an efficient geological sample sampling apparatus, which comprises a power spiral drilling bit device (5) for drilling a sample inside a slit (10) in a geological body (1), and a fixed rack (2) fixedly installed on the geological body (1), wherein the upper side of the power spiral drilling bit device (5) and the lower end of a lifting driving outer thread member (44) are fixedly connected, the outer peripheral surface of the lifting driving outer thread member (44) is provided with outer threads, the outer threads and inner threads inside a gear thread member (41) rotatably arranged inside the fixed rack (2) and driven by a driving gear (43) are matched, the inner peripheral surface of the lifting driving outer thread member (44) is provided with an axially-extending sliding groove (40), the axially-extending sliding groove (40) and a radially-extending part (35) fixedly connected to the lower end of a connection rod (34) form axial sliding and circumferentially-fixed matching, and the connection rod (34) can penetrate through the inner chamber of the lifting driving outer thread member (44).

A novel lifting type gate structure for a water conservancy project comprises a gate lifting plate for opening and closing a water gate in a wall and a fixed rack fixedly mounted on the wall. The upper side of the gate lifting plate is fixedly connected with the lower end of a lifting driving thread sleeve. An external thread is arranged on the peripheral face of the lifting driving thread sleeve and used for being matched with an internal thread in a lower driving gear which is rotationally mounted in the fixed rack and engaged with a lower drive gear. The lower drive gear is driven by a lower driving motor fixedly mounted in a cavity of the fixed rack. A sliding groove extending axially is formed in the inner circumferential face of the lifting driving thread sleeve and used for being in axial sliding and circumferential fixed fit with a radial extending part fixed connected to the lower end of a threaded rod capable of penetrating an inner cavity of the lifting driving thread sleeve.

The invention provides a lifting type water conservancy sluice gate mechanism for irrigation comprising a sluice gate lifting plate (5) for opening and closing a lock entrance (15) of a wall body (1) and a fixing rack (2) which is fixedly installed on the wall body (1); an upper side of the sluice gate lifting plate (5) is fixedly connected with a lower end of a lifting driving screw sleeve (44); an external periphery surface of the lifting driving screw sleeve (44) is provided with external screw threads for matching with internal screw threads of a lower driving screw member (41) which is driven by a lower driving worm (43) and is rotatably installed inside the fixing rack (2); the internal periphery surface of the lifting driving screw sleeve (44) is provided with a slideway (40) which extends axially for axially sliding and circumferentially fixed matching with a radially extending part (35) which is fixedly connected with a lower end of a threaded rod (34) passing through the cavity of the lifting driving screw sleeve (44).

The invention relates to a sampling structure for geological samples. The sampling structure comprises a dynamic spiral bit unit (5) used for drilling samples in a slit (10) in a geologic body (1), and a fixed rack (2) fixedly mounted to the geologic body (1). The upper side of the dynamic spiral bit unit (5) is fixedly connected with the lower end of a lift-drive external thread part (44), an external thread is arranged on the outer peripheral surface of the lift-drive external thread part (44) and used for matching with an internal thread which is arranged in a gear thread part (41), the gear thread part (41) is rotationally mounted in the fixed rack (2) and driven by a driving gear (43), a slide slot (40) extending axially is formed in the inner peripheral surface of the lift-drive external thread part (44) and used for being in axially slidable and circumferentially fixed fit with a radial extension portion (35), and the radial extension portion (35) is fixedly connected to the lower end of a connecting rod (34) capable of penetrating an inner cavity of the lift-drive external thread part (44).

A sampling structure for a mineral product sample comprises a power spiral drill bit device (5) used for drilling a sample in a narrow seam (10) in a geological body (1) and a fixing machine frame (2) used for being fixedly installed on the geological body (1). The upper side of the power spiral drill bit device (5) is fixedly connected with the lower end of a lifting driving external thread element (44), an external thread is arranged on the outer circumference of the lifting driving external thread element (44) and used for being matched with an internal thread in a gear thread element (41) which is rotationally installed in the fixing machine frame (2) and driven by a driving gear (43), and an axially extending sliding groove (40) is formed in the inner circumference of the lifting driving external thread element (44) and used for axially sliding and being circumferentially and fixedly matched with a radial extending part (35) which is fixedly connected with the lower end of a connection rod (34) capable of penetrating through an inner cavity of the lifting driving external thread element (44).

An easy-sampling geological sample sampling mechanism comprises a dynamic spiral drill bit device (5) for drilling a sample in a slit (10) in a geological body (1) and a fixing machine frame (2) fixedly mounted on the geological body (1), wherein the upper side of the dynamic spiral drill bit device (5) is fixedly connected with the lower end of a lifting driving external thread component (44); external threads are arranged on the outer circumferential surface of the lifting driving external thread component (44), and are matched with internal threads in a gear thread component (41) rotatably mounted inside the fixing machine frame (2) and driven by a driving gear (43); an axially stretching sliding slot (40) is formed in the inner circumferential surface of the lifting driving external thread component (44), and is axially slidably and circumferentially fixedly matched with a radial stretching part (35) fixedly connected with the lower end of a connecting rod (34) capable of running through the inner cavity of the lifting driving external thread component (44).

A sampling device for geological samples comprises a power spiral bit device (5) and a fixed rack (2), wherein the power spiral bit device (5) is used for drilling a sample in a slit (10) in a geologic body (1), and the fixed rack (2) is fixedly mounted on the geologic body (1). The upper side of the power spiral bit device (5) is fixedly connected with the lower end of a lifting-driving external thread part (44), an external thread is arranged on the outer circumferential face of the lifting-driving external thread part (44) and used for being matched with an internal thread of a gear thread part (41) which is rotatably mounted in the fixed rack (2) and driven by a driving gear (43), and an axial-extending sliding groove (40) is formed in the inner circumferential face of the lifting-driving external thread part (44) and used for being matched with a radial extending part (35) in axial-sliding and circumferential-fixing modes; and the radial extending part (35) is fixedly connected with the lower end of a connecting rod (34) which can penetrate through an inner cavity of the lifting-driving external thread part (44).

A novel water conservancy gate structure comprises a gate lifting plate used for carrying out opening and closing operation on a gate opening in a wall body and a fixed rack fixedly mounted on the wall body; the upper side of the gate lifting plate is fixedly connected with the lower end of a lifting drive thread sleeve, external threads are arranged on the peripheral face of the lifting drive thread sleeve and are used for being matched with internal threads in a lower drive gear which is rotatably mounted in the fixed rack and engaged with a lower driving gear, the lower driving gear is driven by a lower drive motor fixedly mounted in a cavity of the fixed rack, and a sliding groove which axially extends is formed in the inner circumference face in the lifting drive thread sleeve and is used for being matched with a radial extending portion in an axial sliding and circumferential fixed manner, wherein the radial extending portion is fixedly connected with the lower end of a thread rod capable of penetrating an inner cavity of the lifting drive thread sleeve.

Provided is a lifting type water conservancy gate structure. The lifting type water conservancy gate structure comprises a gate lifting plate (5) used for conducting switch-on and switch-off operation on a gate port (15) formed in a wall (1) and a fixed rack (2) which is fixedly installed on the wall (1), wherein the upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting driving threaded sleeve (44), the outer circumferential surface of the lifting driving threaded sleeve (44) is provided with an outer thread used for being matched with an inner thread formed in a lower driving threaded part (41) which is rotatably installed in the fixed rack (2) and driven by a lower driving device (43), and the inner circumferential surface of the lifting driving threaded sleeve (44) is provided with an axially extending sliding groove (40) used for being matched with a radial extending part (35) fixedly connected with the lower end of a threaded rod (34) capable of penetrating through an inner cavity of the lifting driving threaded sleeve (44) in an axially sliding and circumferentially fixing mode.

Disclosed is a lifting type water conservancy gate device. The lifting type water conservancy gate device comprises a gate lifting plate (5) and a fixed rack (2). The gate lifting plate (5) is used for conducting opening and closing operations on a gate opening (15) in a wall body (1). The fixed rack (2) is fixedly installed on the wall body (1). The upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting driving threaded sleeve (44). The peripheral surface of the lifting driving threaded sleeve (44) is provided with an outer thread used for being matched with an inner thread in a lower driving threaded part (41) which is rotationally installed in the fixed rack (2) and driven by a lower driving device (43). An axially extending sliding groove (40) is formed in the inner circumferential face of the lifting driving threaded sleeve (44) and used for being matched with a radial extension part (35) circumferentially fixedly in an axially slidable mode. The radial extension part (35) is fixedly connected with the lower end of a threaded rod (34) capable of penetrating through an inner cavity of the lifting driving threaded sleeve (44).

The invention discloses an energy-saving and environmental-protection geological sampling device. The device comprises a dynamic auger bit device (5) for drilling to take a sample in a slit (10) in a geological body (1) and a fixed frame (2) fixedly installed on the geological body (1). The upper side of the dynamic auger bit device (5) is fixedly connected to the lower end of a lifting driving external thread element (44). The periphery of the lifting driving external thread element (44) is provided with external threads for fitting to internal threads in a gear thread element (41) which is rotatingly installed in the fixed frame (2) and is driven by a driving gear (43). The inner circumferential surface of the lifting driving external thread element (44) is provided with an axially extending chute (40) for axially slidingly and circumferentially fixedly fitting to a radial extension part (35) fixedly connected to the lower end of a connection rod (34) going through the inner cavity of the lifting driving external thread element (44).

An excavation-convenient geological sample drilling device includes a power auger head apparatus (5) used for drilling and collecting a sample in a narrow gap (10) in a geologic body (1), and a fixing rack (2) being installed fixedly on the geologic body (1). The upper side of the power auger head apparatus (5) is fixedly connected to the lower end of a lift-driven external thread member (44). An external thread is formed on periphery of the lift-driven external thread member (44) and is matched with an internal thread in a gear thread member (41) which is driven by a driving gear (43) and is rotatably installed in the fixing rack (2). A sliding groove (40) which is axially extended is disposed in an inner periphery of the lift-driven external thread member (44) and is matched with a radial extended part (35) in an axially slidable and circumferentially fixed manner, wherein the radial extended part (35) is fixedly connected to the lower end of a connection rod (34) which can pass through an inner chamber in the lift-driven external thread member (44).

The invention provides a novel drilling structure for mineral sampling. The novel drilling structure comprises a power auger bit device (5) for drilling a sample in a slit (10) in a geologic body (1) and a fixed rack (2) for being fixedly installed on the geologic body (1). The upper side of the power auger bit device (5) is fixedly connected with the lower end of a lifting drive external thread part (44), an external thread is arranged on the outer circumferential face of the lifting drive external thread part (44) to be matched with an internal thread in a gear thread part (44) rotationally installed in the fixed rack (2) and driven by a drive gear (43), and an axial stretching sliding groove (40) is formed in the inner circumferential face of the lifting drive external thread part (44) and is matched with a radial stretching part (35) fixedly connected to the lower end of a connecting rod (34) capable of penetrating through an inner cavity of the lifting drive external thread part (44) in an axial sliding and circumferentially fixed mode.

The invention discloses a mineral sampling structure. The mineral sampling structure comprises a dynamic auger bit device (5) for drilling to take a sample in a slit (10) in a geological body (1) and a fixed frame (2) fixedly installed on the geological body (1). The upper side of the dynamic auger bit device (5) is fixedly connected to the lower end of a lifting driving external thread element (44). The periphery of the lifting driving external thread element (44) is provided with external threads for fitting to internal threads in a gear thread element (41) which is rotatingly installed in the fixed frame (2) and is driven by a driving gear (43). The inner circumferential surface of the lifting driving external thread element (44) is provided with an axially extending chute (40) for axially slidingly and circumferentially fixedly fitting to a radial extension part (35) fixedly connected to the lower end of a connection rod (34) going through the inner cavity of the lifting driving external thread element (44).

A novel gate structure for a water conservancy project comprises a gate lifting plate used for opening and closing a gate opening in a wall body and a fixed rack fixedly mounted on the wall body. The upper side of the gate lifting plate is fixedly connected with the lower end of a lifting drive threaded sleeve. An external thread is arranged on the outer circumferential face of the lifting drive threaded sleeve and used for being matched with an internal thread in a lower drive gear, and the lower drive gear is rotationally mounted in the fixed rack and engaged with a lower driving gear. The lower driving gear is driven by a lower drive motor fixedly mounted in a cavity of the fixed rack. An axially-extending sliding groove is formed in the inner circumferential face of the lifting drive threaded sleeve and used for being in sliding and circumferential fixed fit with a radial extending part in the axial direction, wherein the radial extending part is fixedly connected with the lower end of a threaded rod capable of penetrating an inner cavity of the lifting drive threaded sleeve.

A drilling device for mineral sampling, comprising a power auger device (5) for drilling samples in a slit (10) in a geological body (1) and a device for fixedly installing on the geological body (1) The fixed frame (2) on the body (1), wherein the upper side of the power auger device (5) is fixedly connected with the lower end of the lifting drive external screw (44), and the lifting drive external screw (44) ) is provided with an external thread to cooperate with the internal thread in the gear screw (41) rotatably installed in the fixed frame (2) and driven by the drive gear (43), the lifting drive An axially extending chute (40) is provided on the inner peripheral surface of the external threaded part (44) to be fixedly connected with the lower end of the connecting rod (34) that can pass through the inner cavity of the lifting drive external threaded part (44) The radially extending part (35) of the axial direction is slidable and the circumferential direction is fixedly fitted.

The invention discloses a geological drilling sampling device. The device comprises a dynamic auger bit device (5) for drilling to take a sample in a slit (10) in a geological body (1) and a fixed frame (2) fixedly installed on the geological body (1). The upper side of the dynamic auger bit device (5) is fixedly connected to the lower end of a lifting driving external thread element (44). The periphery of the lifting driving external thread element (44) is provided with external threads for fitting to internal threads in a gear thread element (41) which is rotatingly installed in the fixed frame (2) and is driven by a driving gear (43). The inner circumferential surface of the lifting driving external thread element (44) is provided with an axially extending chute (40) for axially slidingly and circumferentially fixedly fitting to a radial extension part (35) fixedly connected to the lower end of a connection rod (34) going through the inner cavity of the lifting driving external thread element (44).

The invention provides a novel drilling structure for mineral sampling. The novel drilling structure comprises a power auger bit device (5) for drilling a sample in a slit (10) in a geologic body (1) and a fixed rack (2) for being fixedly installed on the geologic body (1). The upper side of the power auger bit device (5) is fixedly connected with the lower end of a lifting drive external thread part (44), an external thread is arranged on the outer circumferential face of the lifting drive external thread part (44) to be matched with an internal thread in a gear thread part (44) rotationally installed in the fixed rack (2) and driven by a drive gear (43), and an axial stretching sliding groove (40) is formed in the inner circumferential face of the lifting drive external thread part (44) and is matched with a radial stretching part (35) fixedly connected to the lower end of a connecting rod (34) capable of penetrating through an inner cavity of the lifting drive external thread part (44) in an axial sliding and circumferentially fixed mode.

The invention discloses a convenient geological sampling mechanism. The mechanism comprises a dynamic auger bit device (5) for drilling to take a sample in a slit (10) in a geological body (1) and a fixed frame (2) fixedly installed on the geological body (1). The upper side of the dynamic auger bit device (5) is fixedly connected to the lower end of a lifting driving external thread element (44). The periphery of the lifting driving external thread element (44) is provided with external threads for fitting to internal threads in a gear thread element (41) which is rotatingly installed in the fixed frame (2) and is driven by a driving gear (43). The inner circumferential surface of the lifting driving external thread element (44) is provided with an axially extending chute (40) for axially slidingly and circumferentially fixedly fitting to a radial extension part (35) fixedly connected to the lower end of a connection rod (34) going through the inner cavity of the lifting driving external thread element (44).

The invention relates to intelligently-controlled lifting type water conservancy gate equipment. The intelligently-controlled lifting type water conservancy gate equipment comprises a gate lifting plate (5) for performing opening-closing operation on a water gate (15) in a wall body (1) and a fixed rack (2) fixedly mounted on the wall body (1), the upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting driving threaded sleeve (44); external threads are formed in the outer circumferential surface of the lifting driving threaded sleeve (44) to be used for being matched with internal threads in a lower driving threaded element (41) which is rotatably mounted in the fixed rack (2) and driven by a lower driving worm (43); a sliding chute (40) axially extending is formed in the inner circumferential surface of the lifting driving threaded sleeve (44) to be used for being slidably matched in an axial direction and being fixedly matched in a circumferential direction with a radial extending part (35) fixedly connected to the lower end of a threaded rod (34) which can penetrate through an inner cavity of the lifting driving threaded sleeve (44).

A solar-powered lifting type water conservancy gate assembly comprises a gate lifting plate (5) used for opening and closing a gate opening (15) in a wall body (1) and a fixed rack (2) fixedly mounted on the wall body (1). The upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting drive threaded sleeve (44). An external thread is arranged on the outer circumferential face of the lifting drive threaded sleeve (44) and used for being matched with an internal thread in a lower drive threaded piece (41), and the lower drive threaded piece (41) is rotationally mounted in the fixed rack (2) and driven by a lower drive worm (43). An axially-extending sliding groove (40) is formed in the inner circumferential face of the lifting drive threaded sleeve (44) and used for being in sliding and circumferential fixed fit with a radial extending part (35) in the axial direction, wherein the radial extending part (35) is fixedly connected with the lower end of a threaded rod (34) capable of penetrating an inner cavity of the lifting drive threaded sleeve (44).

The invention discloses a geological sample drilling device. The geological sample drilling device comprises a powered auger bit device (5) used for drilling samples in slits (10) of a geologic body (1) and a fixed rack (2) used for being fixedly mounted on the geologic body (1), wherein the upper side of the powered auger bit device (5) is fixedly connected with the lower end of a lift driving externally-threaded part (44); an external thread is formed on the outer peripheral surface of the lift driving externally-threaded part (44) and is used for being matched with an internal thread in a gear threaded part (41), which is rotationally mounted in the fixed rack (2) and driven by a drive gear (43); a chute (40) extending axially is formed in the inner peripheral surface of the lift driving externally-threaded part (44) and is used for being capable of axially sliding with and peripherally and fixedly matching with a radial extension part (35) which is fixedly connected to the lower end of a connecting rod (34) capable of penetrating through the inner cavity of the lift driving externally-threaded part (44).

A novel lift-type water conservancy gate device includes a gate lift plate for opening and closing a gate in a wall body and a fixed frame fixed on the wall body, wherein the upper side of the gate lift plate is It is fixedly connected with the lower end of the lift drive threaded sleeve, and the outer peripheral surface of the lift drive threaded sleeve is provided with an external thread to be rotatably installed in the fixed frame and meshed with the lower driving gear in the lower driving gear. The lower driving gear is driven by the lower driving motor fixedly installed in the cavity of the fixed frame, and the inner peripheral surface of the lifting driving threaded sleeve is provided with an axially extending chute for A radially extending portion fixedly connected at the lower end of the threaded rod that can pass through the inner cavity of the lifting driving threaded sleeve is axially slidable and circumferentially fixed.

A sampling structure comprises a dynamic spiral drill device (5) used for drilling the samples in a slit (10) in a geologic body (1) and a fixing frame (2) fixedly mounted on the geologic body (1). The upper side of the dynamic spiral drill device (5) is fixedly connected to the lower end of an elevator drive external thread (44), an external thread arranged on the outer peripheral surface of the elevator drive external thread (44) is used for being matched with an internal thread in a gear threaded element (41) capable of being rotatably mounted on the fixing frame (2) and driven through a drive gear (43), and an axial-extending sliding chute (40) arranged in the inner peripheral surface of the elevator drive external thread (44) is used for being in axial sliding and peripheral-fixing fit with a radial extension portion (35) capable of penetrating the position of the lower end of a connecting rod (34) in the inner cavity of the elevator drive external thread (44).

A stable-structure lifting type water conservancy gate part comprises a gate lifting plate (5) for opening or closing a gate (15) in a wall body (1), and a fixed machine frame (2) fixedly installed on the wall body (1). The upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting drive threaded sleeve (44). The outer circumference of the lifting drive threaded sleeve (44) is provided with an external thread which is used for being matched with an internal thread in a lower drive threaded piece (41) rotationally installed in the fixed machine frame and driven by a lower drive screw (43). An axially-extending slide groove (40) is formed in the inner circumference of the lifting drive threaded sleeve (44) and used for being in axial sliding with and being circumferentially and fixedly matched with a radial extending part (35) fixedly connected with the lower end of a threaded rod (34) capable of penetrating through an inner cavity of the lifting drive threaded sleeve (44).

An Energy-saving environment-friendly lifting type water conservancy gate assembly comprises a gate lifting plate (5) used for carrying out opening and closing operation on a gate opening (15) in a wall body (1) and a fixed rack (2) fixedly mounted on the wall body (1); the upper side of the gate lifting plate (5) is fixedly connected with the lower end of a lifting drive thread sleeve (44), external threads are arranged on the peripheral face of the lifting drive thread sleeve (44) and are used for being matched with internal threads in a lower drive threaded part (41) which is rotatably mounted in the fixed rack (2) and driven by a lower driving worm (43), and a sliding groove (40) which axially extends is formed in the inner circumference face in the lifting drive thread sleeve (44) and is used for being matched with a radial extending portion (35) in an axial sliding and circumferential fixed manner, wherein the radial extending portion is fixedly connected with the lower end of a thread rod (34) capable of penetrating an inner cavity of the lifting drive thread sleeve (44).