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Press-fitting device for a stepped type needle roller bearing without inner ring

A technology of needle roller bearings and press-fitting devices, which is applied in the direction of shafts and bearings, shafts, crankshafts, etc., and can solve problems such as easy tilting of bearings and inability to complete press-fitting

Inactive Publication Date: 2016-06-15
HUNAN LUOYOU ENGINE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this utility model is that if it is used for press-fitting of needle roller bearings without an inner ring, although the assembly can be realized, the centering (centering) ability before assembly and the ability to adjust the centering during assembly are not sufficient. There are deficiencies, the bearing is easy to tilt, and it is easy to fail to complete the press-fitting due to the excessive tilt of the bearing

Method used

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  • Press-fitting device for a stepped type needle roller bearing without inner ring
  • Press-fitting device for a stepped type needle roller bearing without inner ring
  • Press-fitting device for a stepped type needle roller bearing without inner ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7In the shown embodiment, a step-type needle roller bearing press-fitting device without an inner ring includes a bearing press-fit base and a power electric cylinder 1, and the bearing press-fit base includes a force transmission seat 2, a bearing push rod 3. The end of the bearing push rod 3 close to the power electric cylinder 1 is the rear end of the bearing push rod 3. The power transmission seat 2 is connected to the rear end of the bearing push rod 3. The power electric cylinder 1 has a piston rod, and the piston rod The protruding direction of the bearing is towards the force transmission seat 2, and the outer positioning sleeve 4 that is slidingly connected with the bearing push rod 3 and coaxial is set on the bearing push rod 3, and the outer positioning sleeve 4 is provided with a matching inner hole 5. The preset inner hole 6, the matching inner hole 5 and th...

Embodiment 2

[0033] Embodiment 2: the basic structure and implementation mode of this embodiment are the same as embodiment 1, and its difference is, as Figure 8 , Figure 9 As shown in , the outer positioning sleeve 4 is provided with an inner chute 19, and the outer positioning sleeve 4 is provided with an adjustment main rod 20 that can slide in the inner chute 19, and the adjustment main rod 20 Through the axis of the outer positioning sleeve 4 and perpendicular to the axis of the outer positioning sleeve 4, both ends of the adjusting main rod 20 are outside the outer positioning sleeve 4, and two self-adjusting parts are respectively arranged at the two ends of the adjusting main rod 20. The self-adjusting part includes an outer horizontal connecting rod 21, a vertical connecting rod 22 connected to the outer horizontal connecting rod 21, a self-adjusting horizontal round rod 23 connected to the vertical connecting rod 22, and two self-adjusting rods belonging to the two self-adjusti...

Embodiment 3

[0039] Embodiment 3: the basic structure and implementation mode of this embodiment are the same as embodiment 2, and its difference is, as Figure 10 , Figure 11 As shown in , the outer ring limiting rod 24 is slidingly connected with the adjusting main rod 20 , the sliding direction is horizontal, and the inner end of the outer ring limiting rod 24 is connected to the outer positioning sleeve 4 . The outer ring limit rod 24 is slidingly connected with the adjusting main rod 20, which ensures that the outer ring limit rod 24 can move toward the bearing hole 31 along with the bearing to be press-fitted. During the process, the outer ring limit rod 24 still provides the self-aligning and centering function for the bearing to be pressed at all times. When the bearing to be pressed has a tendency to tilt, the outer ring limit rod 24 will completely lock the inclination angle of the bearing to be pressed. It fully guarantees the horizontality of the bearing to be pressed during ...

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Abstract

The invention discloses a press-fitting device for a stepped type needle roller bearing without an inner ring. The press-fitting device is reasonable in structure and capable of effectively pressing the existing stepped type needle roller bearing without the inner ring to a bearing hole in the rear end of a crankshaft, centering and adaptive adjustment can be carried out during press-fitting, the press-fitting process is stable, and the bearing centering is good after assembling. The press-fitting device comprises a bearing press-fitting base and a dynamic electricity cylinder. The bearing press-fitting base comprises a force transmission seat and a bearing push rod. A piston rod of the dynamic electricity cylinder stretches towards the force transmission seat, and the bearing push rod is sleeved with an outer positioning sleeve; the outer positioning sleeve is provided with a plurality of self-adaptive positioning hole groups, each self-adaptive positioning hole group comprises two positioning holes penetrating through the side wall of the outer positioning sleeve, a fixing plunger is arranged on each positioning hole, and each fixing plunger is connected with a contact ball used for making contact with an outer ring of the needle roller bearing through an adjusting spring. An outer spring is arranged between the force transmission seat and the outer positioning sleeve and arranged on the bearing push rod in a sleeving mode. One end of the outer spring is connected with the force transmission seat, and the other end of the outer spring is connected with the outer positioning sleeve.

Description

technical field [0001] The invention belongs to the technical field of crankshaft back-end bearing press-fitting, and in particular relates to a step-type needle-roller bearing press-fitting device without an inner ring. Background technique [0002] In the assembly process of many types of engine crankshaft assemblies, the rear end of the crankshaft often requires embedded bearings. The assembly method is to open a bearing hole at the rear end of the crankshaft, and then press the bearing into the bearing hole. Among them, the stepped needle roller bearing without an inner ring is a commonly used bearing that is press-fitted with the bearing hole at the rear end of the crankshaft. Step-type needle roller bearing without inner ring is a deformation of needle roller bearing without inner ring. It has a small diameter section (extension section) and a large diameter section (bearing body). The small diameter section is mainly used for end face matching and positioning with the...

Claims

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Application Information

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IPC IPC(8): B23P19/02
CPCB23P19/02B23P2700/07
Inventor 童向荣陈政弘王瑞平
Owner HUNAN LUOYOU ENGINE PARTS
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