A bearing bushing press-fitting tool and its usage method

Abstract

This invention discloses a bearing bushing press-fitting tool and its usage method. The tool includes a lead screw with an end cap threadedly connected to it, and a press head slidably mounted thereon. Rotating the end cap pushes the press head to press the bearing into the bearing housing, thereby pressing the bushing into the bearing's inner bore. This tool is lightweight, easy to use, and provides precise press-fitting, effectively preventing damage to the surface of the parts during the press-fitting process.

Description

Technical Field

[0001] This invention belongs to the field of tooling and fixture technology, and particularly relates to a bearing bushing press-fitting tool and its usage method. Background Technology

[0002] Currently, the main pressing methods for bushings are press-fitting using a press or manual hammering. However, these methods have the following drawbacks:

[0003] a) When the bushing is press-fitted using a press, the pressing depth should not exceed the length of the hole in the object being pressed. If the pressing depth exceeds the length of the hole in the object being pressed, a second pressing should be performed by manual hammering or other methods.

[0004] b) The bushing is pressed into an irregular part, and the pressed part is subjected to uneven force or cannot be pressed in at all;

[0005] c) When bushings are manually hammered and pressed, the pressure on the bushings is uneven and can easily damage the surface of the parts.

[0006] d) It is impossible to press-fit bearings and bushings in a confined space. Summary of the Invention

[0007] Purpose of the invention

[0008] To solve the above-mentioned technical problems, the present invention provides a bearing bushing press-fitting tool and its usage method, which can press-fit bushings in a confined space.

[0009] Invention Technology Solutions

[0010] A bearing bushing pressing tool includes a lead screw with an end cap threaded onto it and a pressing head slidably disposed thereon. Rotating the end cap can push the pressing head to press the bearing into the bearing housing and push the bushing into the bearing inner hole.

[0011] Preferably, a planar thrust needle roller bearing and a pad are provided between the end cap and the pressure head, with the pad slidably mounted on the lead screw.

[0012] Preferably, a push rod is detachably connected to the end cap.

[0013] Preferably, one end of the pressure head has two coaxially arranged annular bosses. The outer circumferential surface of the inner annular boss is in clearance fit with the inner hole of the bearing. The outer annular boss pushes the outer ring of the bearing to push the bearing into the bearing seat.

[0014] Preferably, the inner annular boss one protrudes from the outer annular boss two, and the length difference between the annular boss one and the annular boss two ranges from half the bearing height to the bearing height.

[0015] Preferably, the other end of the pressure head has an annular boss three for pressing the bushing, the outer circumferential surface of which is in clearance fit with the inner hole of the bushing.

[0016] Preferably, the length of the annular boss is in the range of one-third to one-half of the bearing height.

[0017] Preferably, the lead screw is also threadedly connected to a bottom block.

[0018] Preferably, the bottom block near the bushing end is also provided with an annular groove for accommodating the end of the bushing, and the distance between the bottom of the annular groove and the end face of the pressure head and the bushing in contact is greater than the height of the bushing.

[0019] A method for using a bearing bushing press-fitting tool includes the following steps:

[0020] (1) Install the end cover, needle roller bearing, pad block and pressure head on the lead screw, install the push rod on the end cover, and make the annular boss of the pressure head face away from the end cover; put the bearing on the annular boss and install the bottom block 9 on the lead screw.

[0021] (2) Rotate the end cover by pushing the push rod, so that the end cover pushes the needle roller bearing, pad block and pressure head toward the bearing seat, so that the annular boss on the pressure head presses the outer ring of the bearing and presses the outer ring of the bearing into the bearing seat; during this process, turn the bottom block to prevent the lead screw and the end cover from rotating synchronously.

[0022] (3) Remove the bottom block and the pressure head, and turn the pressure head so that the annular boss three faces away from the end cover. Put the bushing on the annular boss three and install the bottom block on the lead screw.

[0023] (4) Rotate the end cover by pushing the push rod, so that the end cover pushes the needle roller bearing, pad block and pressure head toward the bearing seat, so that the pressure head pushes the bushing and presses it into the bearing inner hole until it is pressed into place.

[0024] Advantages of this invention: The tool is lightweight, easy to use, and provides precise pressing, while effectively preventing damage to the surface of parts during pressing operations. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a bearing bushing press-fitting tool according to the present invention.

[0026] Figure 2 This is a schematic diagram of pressing a bearing bushing using this tool.

[0027] In the diagram: 1—lead screw; 2—end cap; 3—push rod; 4—flat thrust needle roller bearing; 5—pad; 6—pressure head; 7—bearing; 8—bearing seat; 9—bottom block; 10—shield. Detailed Implementation

[0028] The present invention is achieved through the following technical solution.

[0029] A bearing bushing press-fitting tool includes a lead screw 1, on which an end cap 2, a planar thrust needle roller bearing 4, a pad 5, a press head 6, and a base block 9 are sequentially arranged. The end cap 2 and the base block 9 are threadedly connected to the lead screw 1, and the pad 5 is slidably mounted on the lead screw 1. A push rod 3 is radially threaded onto the end cap 2. The number of push rods 3 is selected according to the available space; push rods 3 can be arranged on both sides or one side of the end cap 2. The planar thrust needle roller bearing 4 and the pad 5 reduce the friction between the end cap 2 and the press head 6.

[0030] One end of the pressure head 6 has two coaxially arranged annular bosses. The outer circumferential surface of the inner annular boss 1 is in clearance fit with the inner hole of the bearing. The bearing is pushed into the bearing housing 8 by the end face of the outer annular boss 2. An annular groove is formed between the annular boss 1 and the annular boss 2. The inner annular boss 1 protrudes beyond the outer annular boss 2. The length difference between the annular boss 1 and the annular boss 2 is in the range of half the bearing height to the bearing height to avoid interference. The other end of the pressure head 6 has an annular boss 3 for pressing the bushing. The outer circumferential surface of the annular boss 3 is in clearance fit with the inner hole of the bushing 10. The end face of the pressure head 6 outside the annular boss 3 contacts the end face of the bushing 10. The length of the annular boss 3 is in the range of one-third to half the bearing height to avoid interference. During the pressing process, the bearing 7 and the bushing 10 are only subjected to thrust and not friction, ensuring that equal pressure is applied to the contact area of ​​the bearing 7 and the bushing 10. The axes of annular boss one, annular boss two, and annular boss three coincide with the axis of pressure head 6.

[0031] One end of the base block 9 has an annular boss four that mates with the end face and inner hole of the bearing housing 8 away from the bearing 7. The outer circumferential surface of the annular boss four is clearance-fitted with the inner hole of the bearing housing 8. To avoid the long bushing, an annular groove for accommodating the end of the bushing is also provided on the end of the base block 9 near the bushing. The distance between the bottom of the annular groove and the end face of the pressure head 6 that contacts the bushing 10 is greater than the height of the bushing 10. The other end of the base block 9 can be tightened using a No. 32 sleeve.

[0032] The method of using the above-mentioned bearing bushing press-fitting tool includes the following steps:

[0033] (1) Install the end cap 2, needle roller bearing 4, pad block 5, and pressure head 6 onto the lead screw 1. Install the push rod 3 onto the end cap 2, with the annular boss of the pressure head 6 facing away from the end cap 2. Fit the bearing 7 onto the annular boss and install the base block 9 onto the lead screw 1.

[0034] (2) Rotate the end cover 2 by pushing the push rod 3, so that the end cover 2 pushes the needle roller bearing 4, the pad block 5, and the pressure head 6 toward the bearing seat 8, so that the annular boss on the pressure head 6 presses the outer ring of the bearing and presses the outer ring of the bearing into the bearing seat 8. During this process, the bottom block 9 can be turned to prevent the lead screw 1 and the end cover 2 from rotating synchronously.

[0035] (3) Remove the bottom block 9 and the pressure head 6, and turn the pressure head 6 so that the annular boss three faces away from the end cover 2. Put the bushing 10 on the annular boss three, and install the bottom block 9 on the lead screw 1. For the long bushing, make the end of the long bushing 10 extend into the annular groove on the bottom block 9.

[0036] (4) Rotate the end cover 2 by pushing the push rod 3, so that the end cover 2 pushes the needle roller bearing 4, the pad block 5, and the pressure head 6 toward the bearing seat 8, so that the pressure head 6 pushes the bushing 10 and presses it into the inner hole of the bearing 7 until it is pressed into place.

[0037] The scope of protection of this invention is not limited to the embodiments described above. Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its scope. If such modifications and variations fall within the scope of the claims of this invention and their equivalents, then the intent of this invention also includes these modifications and variations.

Claims

1. A bearing bushing press-fitting tool, characterized in that, The device includes a lead screw with a threaded end cap and a sliding pressure head. Rotating the end cap pushes the pressure head to press the bearing into the bearing housing and the bushing into the bearing bore. One end of the pressure head has two coaxially arranged annular bosses. The outer circumferential surface of the inner annular boss one is in clearance fit with the bearing bore. The outer annular boss two pushes the bearing outer ring to push the bearing into the bearing housing. An annular groove is formed between the annular boss one and the annular boss two. The inner annular boss one protrudes beyond the outer annular boss two. The length difference between the annular boss one and the annular boss two is between half the bearing height and the bearing height to avoid interference. The other end of the pressure head has an annular boss three for pressing the bushing. The outer circumferential surface of this annular boss three is in clearance fit with the bushing bore. The pressure head end face on the outer side of the three annular bosses contacts the bushing end face. The length of the three annular bosses ranges from one-third to one-half of the bearing height to avoid interference. During the press-fitting process, the bearing and bushing are only subjected to thrust and not friction, ensuring that equal pressure is applied to the contact area of ​​the bearing and bushing. The axes of the three annular bosses coincide with the axis of the pressure head. One end of the bottom block has an annular boss four that can mate with the end face and inner hole of the bearing housing away from the bearing. The outer circumferential surface of the annular boss four is clearance-fitted with the inner hole of the bearing housing. To avoid long bushings, an annular groove for accommodating the end of the bushing is also provided near the bushing end of the bottom block. The distance between the bottom of the annular groove and the end face of the pressure head that contacts the bushing is greater than the height of the bushing. The other end of the bottom block can be tightened with a No. 32 sleeve.

2. The bearing bushing press-fitting tool as described in claim 1, characterized in that, A planar thrust needle roller bearing and a pad are also provided between the end cover and the pressure head, with the pad slidingly mounted on the lead screw.

3. The bearing bushing press-fitting tool as described in claim 1, characterized in that, A push rod is detachably connected to the end cap.

4. A bearing bushing press-fitting tool as described in any one of claims 1 to 3, characterized in that, The lead screw also has a bottom block connected by threads.

5. The method of using the bearing bushing press-fitting tool as described in claim 4, characterized in that, Includes the following steps: Install the end cap, needle roller bearing, pad block, and pressure head onto the lead screw; install the push rod onto the end cap, with the annular boss of the pressure head facing away from the end cap; fit the bearing onto the annular boss and install the base block onto the lead screw. Rotating the end cover by pushing the push rod causes the end cover to push the needle roller bearing, pad block, and pressure head toward the bearing seat, causing the annular boss on the pressure head to press the outer ring of the bearing into the bearing seat; during this process, the bottom block is turned to prevent the lead screw and the end cover from rotating synchronously. Remove the bottom block and pressure head, and turn the pressure head so that the third annular boss faces away from the end cover. Put the bushing on the third annular boss and install the bottom block on the lead screw. Rotating the end cover by the push rod causes the end cover to push the needle roller bearing, pad, and pressure head toward the bearing seat, causing the pressure head to push the bushing and press it into the bearing inner hole until it is in place.

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