Tool for bushing machining

Abstract

The invention discloses a tool for bush machining, and belongs to the technical field of bush machining. The device comprises an upper die assembly and a lower die assembly, the upper die assembly comprises a mounting plate, a plurality of pressure rods are mounted on the mounting plate, a reaming area is arranged on the peripheral side of each pressure rod, and the reaming areas are located at different heights respectively; the lower die assembly comprises a base, a plurality of clamping pieces are installed on the base, the clamping pieces are used for clamping the peripheral sides of the bushings, and a supporting assembly used for making contact with the bottom ends of the bushings is installed on the base. Compared with the prior art, the clamping piece can clamp different bushings, the positioning plate does not need to be replaced according to the models of the bushings, adaptability is improved, scrap iron is not prone to falling onto the supporting assembly in the reaming process, the reaming efficiency is prevented from being affected by repeated cleaning, the positions of reaming areas of the multiple pressure rods are different, and the machining precision is improved. Therefore, the multiple bushings can be chambered at the same time, and the phenomenon of insufficient pressure of a press machine is avoided.

Description

Technical Field

[0001] This invention relates to the field of bushing processing, and in particular to a tooling for bushing processing. Background Technology

[0002] The post-processing of vibration-damping rubber bushings is a crucial step, significantly impacting their performance. One such step is the hole-reaming process.

[0003] When expanding the hole of a shock-absorbing rubber bushing, corresponding tooling is often used. The upper die is mounted on the press, and the lower die is mounted on the stamping platform of the press. The expansion is achieved by the pressure rod of the upper die in conjunction with the press. However, because the pressure applied by the press is limited, the expansion is usually achieved by a single expanding rod passing through the press to enlarge the inner hole of the bushing to the size of the pressure rod. This fixture can only enlarge the inner hole of one bushing at a time, resulting in low efficiency. If two or more bushings are enlarged simultaneously, insufficient pressure can easily lead to enlargement failure. Furthermore, the existing bushing fixture requires different positioning plates to be used when dealing with different models of shock-absorbing rubber bushings to ensure that the shock-absorbing rubber bushing can be placed in the positioning hole of the positioning plate, which has poor adaptability. In addition, after the pressure rod is enlarged, metal shavings will remain in the positioning hole of the positioning plate, which needs to be cleaned in time. Otherwise, when the bushing is placed in the positioning hole later, the bushing will be misaligned, affecting the enlargement of the pressure rod, and may even cause the pressure rod to break. This means that the positioning hole needs to be cleaned in time before the next enlargement can be carried out after each stamping, which affects the processing efficiency. Summary of the Invention

[0004] This invention provides a tooling for bushing processing, which can solve the problems of poor adaptability of existing shock-absorbing rubber bushing tooling, inability to position bushings of different models, and the need for repeated cleaning of metal debris after hole enlargement.

[0005] A tooling for bushing machining, comprising: The upper mold assembly includes a mounting plate on which multiple pressure rods are mounted. Each pressure rod has an enlarged hole area on its outer periphery, and the multiple enlarged hole areas are located at different heights. The lower mold assembly includes a base on which multiple clamping members are mounted for clamping the outer periphery of the bushing, and a support assembly on which a contact is made with the bottom end of the bushing. The clamping member has two pressing parts, which drive the two pressing parts to move. In normal operation, the support assembly is in contact with the bottom surface of the bushing. The pressure rod passes through the clamped bushing and then continues to pass through the support assembly, so that metal debris inside the bushing passes through the support assembly.

[0006] Furthermore, the base has a plurality of guide rods vertically arranged on it, and a return spring is sleeved on the guide rods. A limit plate is installed on the base, and a discharge plate is slidably fitted between the plurality of guide rods. The discharge plate is located above the clamping member and has a plurality of through holes on its top surface for the pressure rod to pass through. The top of the return spring rests against the discharge plate.

[0007] Furthermore, the clamping member includes a mounting frame mounted on the base, on which two sliding frames are symmetrically slidably mounted. Each sliding frame has a V-shaped clamping plate horizontally constructed on its opposite sides. The inner V-face of the clamping plate is used to clamp the bushing. A transmission component for driving the two sliding frames to move closer or further apart is mounted on the mounting frame.

[0008] Furthermore, the transmission assembly includes a positive and negative screw that is horizontally and rotatably mounted on the mounting frame, and the sliding bracket is threaded onto the positive and negative screw.

[0009] Furthermore, the support assembly includes two support plates mounted on the base, with a bearing plate elastically rotatably mounted on opposite sides of the two support plates. The support plates are configured with limiting protrusions for keeping the bearing plate horizontal under normal conditions. Clamping members are arrayed along the axial direction of the bearing plate, and the bottom end of the clamped bushing contacts the two bearing plates.

[0010] Furthermore, the support plate is provided with an installation groove, a sliding block is slidably installed in the installation groove, a return spring is installed between the sliding block and the installation groove, and a hinge rod is hinged between the sliding block and the bearing plate.

[0011] Furthermore, a box is installed on the base, and two mounting rollers are inclinedly arrayed and rotatably mounted inside the box. Each mounting roller is fitted with a synchronous pulley, and a synchronous belt is installed between the two synchronous pulleys. A chip removal groove is opened on one side of the box near the lowest point of the upper surface of the synchronous belt. A collection box is installed on the base, and a transmission mechanism for driving the mounting rollers to rotate is installed on the base.

[0012] Furthermore, the transmission mechanism includes a touch plate that is elastically and vertically slidably mounted on the base. The bottom of the unloading plate is constructed with an actuating block for contacting the touch plate. A linkage is installed between the touch plate and the mounting roller. When the touch plate moves downward, the linkage drives the mounting roller to rotate unidirectionally.

[0013] Furthermore, the linkage includes a movable block that is horizontally slidably mounted on the base, a pulley assembly with the same tilt angle as the timing belt is installed between the mounting rollers, a plurality of forcing blocks are installed in a circular array on the outer periphery of the pulley assembly, a linkage rod is hinged between the movable block and the touch plate, a first spring telescopic rod is installed on the bottom surface of the movable block, the telescopic end of the first spring telescopic rod is vertically downward and has a wedge-shaped block, when the movable block moves horizontally along the direction of the pulley assembly tilting downward, one side plane of the wedge-shaped block contacts the forcing block.

[0014] Furthermore, multiple sets of second spring telescopic rods are installed on the mounting frame, with each set containing four second spring telescopic rods and their top telescopic ends mounted on the mounting frame.

[0015] Beneficial effects: 1. Compared with the prior art, the clamping component of this invention can clamp different bushings without changing the positioning plate according to the bushing model, which improves adaptability. In addition, during the hole expansion process, iron filings are not easy to fall onto the support component, avoiding repeated cleaning and affecting the hole expansion efficiency. The hole expansion areas of multiple pressure rods are in different positions, which enables the simultaneous hole expansion of multiple bushings and avoids the phenomenon of insufficient pressure of the press. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 Partial three-dimensional sectional view; Figure 3 For the present invention Figure 1 Another partial sectional view; Figure 4 For the present invention Figure 1 Another partial three-dimensional sectional view; Figure 5 This is a schematic diagram of the first part of the structure of the present invention; Figure 6 This is a schematic diagram of the second part of the structure of the present invention; Figure 7 This is a schematic diagram of the third part of the present invention; Figure 8 This is a schematic diagram of the fourth part of the present invention; Figure 9 For the present invention Figure 8 Partial three-dimensional sectional view; Figure 10 For the present invention Figure 9 Enlarged view of the structure at point A in the middle; Figure 11 This is a schematic diagram of the fifth part of the present invention; Figure 12 For the present invention Figure 11 Partial three-dimensional sectional view.

[0017] Explanation of reference numerals in the attached figures: 1. Upper mold assembly; 101. Mounting plate; 102. Pressure rod; 103. Hole enlarging area; 2. Lower mold assembly; 201. Base; 202. Clamping component; 2021. Mounting frame; 2022. Sliding frame; 2023. Clamping plate; 3. Support assembly; 301. Support plate; 302. Bearing plate; 303. Limiting protrusion; 4. Guide rod; 5. Return spring; 6. Limiting plate; 7. Unloading plate; 8. Transmission assembly; 801. Positive and negative screws; 9. Box body; 10. Mounting roller; 11. Synchronization 12. Pulley; 13. Synchronous belt; 14. Chip removal groove; 15. Collection box; 16. Transmission mechanism; 17. Touch plate; 18. Actuating block; 19. Linking element; 10. Moving block; 10. Pulley assembly; 11. Forcing block; 12. Hinge rod; 13. First spring telescopic rod; 14. Wedge block; 15. Linking rod; 16. Mounting groove; 17. Sliding block; 18. Return spring; 19. Second spring telescopic rod; 20. Guide rod; 21. Guide cylinder. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0019] like Figures 1 to 12 As shown in the figure, an embodiment of the present invention provides a bushing machining tooling, which includes: The upper mold assembly 1 includes a mounting plate 101, on which multiple pressure rods 102 are bolted. The mounting plate 101 is mounted on a hydraulic rod on an existing press. Each pressure rod 102 has a reaming area 103 on its outer periphery. The reaming areas 103 are located at different heights. The reaming area 103 is the position where the existing pressure rods 102 are used for reaming. Compared with the diameter of the pressure rods 102, the diameter of the reaming area 103 is larger. The reaming area 103 is the diameter of the hole to be reamed. Compared with the prior art, multiple pressure rods 102 ream downwards simultaneously. Because the reaming areas 103 of the pressure rods 102 are located at different positions, when the mounting plate 101 moves downwards, multiple pressure rods 102 can ream sequentially. This not only allows for faster reaming but also effectively reduces the pressure of the press, preventing pressure overload and insufficient pressure. The lower mold assembly 2 includes a base 201, on which a plurality of clamping members 202 are mounted. The clamping members 202 are used to clamp the outer periphery of the bushing. A support assembly 3 for contacting the bottom end of the bushing is mounted on the base 201. It should be noted that this application does not limit the number of clamping members 202 and pressure rods 102. In this embodiment, the number of clamping members 202 and pressure rods 102 is two. The clamping member 202 has two pressing parts, which drive the two pressing parts to move. Normally, the support assembly 3 is in contact with the bottom surface of the bushing. The pressure rod 102 passes through the clamped bushing and then continues through the support assembly 3, causing metal debris inside the bushing to pass through the support assembly 3. In other words, the bushing is placed on the support assembly 3 to keep it horizontal. After the bushing is positioned between the two pressing parts on the clamping member 202, the two pressing parts press against the bushing, thus clamping multiple bushings. After clamping the bushings, the hydraulic rod moves downwards to move the mounting plate 101 downwards. During the downward movement of the mounting plate 101, multiple pressure rods 102 move downwards simultaneously. Because the expansion areas 103 of the pressure rods 102 are at different positions, the pressure rods 102 will sequentially press against the bushing as they continue to move downwards. Multiple bushings are enlarged. After one bushing is enlarged, another pressure rod 102 enlarges the next bushing. Thus, after the hydraulic rod moves downward once, multiple bushings can be enlarged, effectively reducing the load on the press. During the enlargement process, a small amount of metal debris falls off. The support component 3 not only supports the bushings, but the metal debris falling off during the enlargement process also passes through the support component 3, effectively reducing the number of cleaning operations. Compared with the prior art, the clamping component 202 can clamp different bushings without changing the positioning plate according to the bushing model, improving adaptability. During the enlargement process, metal debris is less likely to fall onto the support component 3, avoiding repeated cleaning that affects the enlargement efficiency. The enlargement areas 103 of the multiple pressure rods 102 are in different positions, thus enabling the simultaneous enlargement of multiple bushings and avoiding insufficient press pressure.

[0020] like Figure 1As shown, in some embodiments, a plurality of guide rods 4 are vertically constructed on the base 201, and a return spring 5 is sleeved on the guide rod 4. A limit plate 6 is installed on the base 201, and a discharge plate 7 is slidably fitted between the plurality of guide rods 4. The discharge plate 7 is located above the clamping member 202 and has a plurality of through holes on its top surface for the pressure rod 102 to pass through. The top of the return spring 5 abuts against the discharge plate 7. That is, during the downward movement of the mounting plate 101, the mounting plate 101 will contact the discharge plate 7, thereby causing the discharge plate 7 to move downward. At this time, the return spring 5 will be compressed. The main function of the return spring 5 is to prevent the design of the discharge plate 7 from affecting the movement stroke of the guide rods 4. Preferably, the base 201 has a limit plate 6 installed on the base 201. 1. Vertical guide rods 22 are installed at the four corners, and four guide cylinders 23 are installed on the mounting plate 101 for fitting onto the guide rods 22, which serve as guides. After the multiple pressure rods 102 have completed the enlargement, when the multiple pressure rods 102 move upward, the clamping member 202 avoids damaging the surface roughness of the bushing. When the pressure rods 102 need to move upward, the clamping member 202 needs to release the clamp on the bushing. At this time, the upward movement of the pressure rods 102 will lift the multiple bushings upward at the same time until the top of the bushing contacts the bottom surface of the unloading plate 7 (at this time, the unloading plate 7 has been reset and abuts against the limiting plate 6), thereby causing the bushing to disengage from the pressure rods 102 to complete the unloading.

[0021] like Figure 1 and Figure 6 As shown, in some embodiments, the clamping member 202 includes a mounting frame 2021 mounted on the base 201. Two sliding frames 2022 are symmetrically slidably mounted on the mounting frame 2021. V-shaped clamping plates 2023 are horizontally constructed on opposite sides of the sliding frames 2022. The inner V-shaped surface of the clamping plate 2023 is used to clamp the bushing. A transmission component 8 is mounted on the mounting frame 2021 to drive the two sliding frames 2022 to move closer or further away from each other. That is, the transmission component 8 will cause the two sliding frames 2022 to move closer or further away from each other simultaneously. The V-shaped design of the clamping plate 2023 can clamp bushings of different models. Moreover, the simultaneous movement of the sliding frames 2022 closer or further away from each other can ensure that after the clamping plate 2023 clamps the bushing, the bushing and the pressure rod 102 are coaxial, thus ensuring the hole enlargement accuracy.

[0022] like Figure 1 and Figure 6As shown, in some embodiments, the transmission assembly 8 includes a forward and reverse screw 801 horizontally and rotatably mounted on the mounting frame 2021, and a sliding frame 2022 threadedly sleeved on the forward and reverse screw 801. Preferably, to facilitate the rotation of the forward and reverse screw 801, two meshing bevel gears are rotatably mounted on the forward and reverse screw 801, one of which is rotatably mounted on the mounting frame 2021 and has a knob, making it more convenient for the operator to rotate. The mounting plate 101 has a slot so that the mounting plate 101 will not contact the knob when moving downwards. The forward and reverse screw 801 has self-locking properties, which can effectively ensure the clamping force and prevent the bushing from loosening during the hole enlargement process.

[0023] like Figure 8 , Figure 9 and Figure 10 As shown, in some embodiments, the support assembly 3 includes two support plates 301 mounted on the base 201. A bearing plate 302 is elastically rotatably mounted on opposite sides of the two support plates 301. A limiting protrusion 303 is constructed on the support plate 301 to maintain the bearing plate 302 horizontally under normal conditions. Clamping members 202 are arrayed along the axial direction of the bearing plate 302, and the bottom end of the clamped bushing contacts the two bearing plates 302. That is, the bushing is first placed on the two bearing plates 302 before being clamped, such that the bottom of the bushing is in contact with the two bearing plates 302. The 02 contact keeps the bushing horizontal. After clamping is completed, when the pressure rod 102 moves downward, after the pressure rod 102 completes the hole expansion, it will pass through the bushing and contact the two support plates 302. This forces the two support plates 302 to rotate from horizontal to tilted, causing the metal filings on the support plates 302 to slide off along the tilt direction of the support plates 302. This not only maintains the horizontality after clamping, but also prevents metal filings from adhering to the support plates 302. It is convenient to use and makes clamping the bushing more convenient.

[0024] like Figure 1 , Figure 10 and Figure 11 As shown, in some embodiments, a mounting groove 18 is provided on the support plate 301, and a sliding block 19 is slidably installed in the mounting groove 18. A return spring 20 is installed between the sliding block 19 and the mounting groove 18. A hinge rod 1604 is hinged between the sliding block 19 and the support plate 302. When the support plate 302 rotates, the rotation of the support plate 302 will drive the hinge rod 1604 to move. Because the hinge rod 1604 is hinged to the sliding block 19, the rotation of the support plate 302 will drive the sliding block 19 to move, thereby compressing or stretching the return spring 20, converting the rotational force of the support plate 302 into a horizontal sliding force, and the return spring 20 can effectively ensure the return effect of the support plate 302.

[0025] like Figure 1 and Figure 3 As shown, to facilitate the centralized collection of metal filings, a box 9 is installed on the base 201. Two mounting rollers 10 are inclined and rotatably mounted inside the box 9. Each mounting roller 10 is fitted with a synchronous pulley 11, and a synchronous belt 12 is installed between the two synchronous pulleys 11. A chip discharge groove 13 is provided on one side of the box 9 near the lowest point of the upper surface of the synchronous belt 12. A collection box 14 is installed on the base 201, and a transmission mechanism 15 for driving the mounting rollers 10 to rotate is installed on the base 201. That is, the mounting rollers 10 will rotate through the transmission mechanism 15. During the rotation of the mounting rollers 10, the metal filings falling on the synchronous belt 12 will be transported into the chip discharge groove 13, so that the metal filings pass through the chip discharge groove 13 and enter the collection box 14, thereby enabling the centralized collection of metal filings in the collection box 14.

[0026] like Figure 1 and Figure 3 As shown, in some embodiments, the transmission mechanism 15 includes a touch plate 1501 that is elastically and vertically slidably mounted on the base 201. Preferably, a spring telescopic rod is mounted on the base 201, one end of which is connected to the touch plate 1501 to reset the touch plate 1501. The bottom of the unloading plate 7 is constructed with an actuating block 1502 for contacting the touch plate 1501. A linkage 16 is installed between the touch plate 1501 and the mounting roller 10. When the touch plate 1501 moves downward, the linkage 16 drives the mounting roller 10 to rotate unidirectionally. When the mounting plate 101 moves downward, it contacts the unloading plate 7, causing the actuating block 1502 on the unloading plate 7 to move downward. During the downward movement, the actuating block 1502 drives the touch plate 1501 to move downward. When the touch plate 1501 moves downward, the linkage 16 causes multiple mounting rollers 10 to rotate unidirectionally. Figure 3 As shown, the mounting roller 10 rotates clockwise, meaning that the upper surface of the timing belt 12 moves toward the chip discharge groove 13, thereby completing the centralized collection of metal chips.

[0027] like Figure 11 and Figure 12The specific structure of the linkage 16 is disclosed. The linkage 16 includes a moving block 1601 horizontally slidably mounted on the base 201, a pulley assembly 1602 with the same inclination angle as the synchronous belt 12 mounted between the mounting rollers 10, a plurality of forcing blocks 1603 mounted in a circular array on the outer periphery of the pulley assembly 1602, a linkage rod 17 hinged between the moving block 1601 and the actuating plate 1501, a first spring telescopic rod 1605 mounted on the bottom surface of the moving block 1601, the telescopic end of the first spring telescopic rod 1605 is vertically downward and has a wedge block 1606. When the moving block 1601 moves horizontally along the direction of the pulley assembly 1602 tilting downward, one side plane of the wedge block 1606 contacts the forcing block 1603. That is, when the mounting plate 101 moves downward, it will cause the actuating block 1502 to move downward. During the downward movement of the actuating block 1502, it will contact the actuating plate 1501, thereby causing the actuating plate 1501 to move downward. When the actuating plate 1501 moves downward, it drives the moving block 1601 to move from left to right via the linkage 17. This causes one side of the moving block 1601 to contact the forcing block 1603, thereby causing the belt on the pulley assembly 1602 to rotate clockwise. When the mounting plate 101 moves upward, causing the actuating block 1502 to reset, the actuating plate 1501 causes the inclined surface of the wedge block 1606 to contact the forcing block 1603 during the reset process. This forces the wedge block 1606 to move upward, preventing the pulley assembly 1602 from rotating in the opposite direction. In other words, the elasticity of the first spring telescopic rod 1605 is less than the frictional force when the pulley assembly 1602 is driven, thus preventing the pulley assembly 1602 from rotating in the opposite direction. After the mounting plate 101 moves back and forth once more, the pulley assembly 1602 can rotate in one direction to transport metal chips without the need for additional drive of the pulley assembly 1602, making it more convenient to use.

[0028] like Figure 1 and Figure 6 As shown, to facilitate hole enlargement, multiple sets of second spring telescopic rods 21 are installed on the mounting frame 2021. Each set of second spring telescopic rods 21 consists of four rods, with the top telescopic end mounted on the mounting frame 2021. After the pressure rod 102 completes hole enlargement, the upward movement of the pressure rod 102 will cause multiple bushings to move upward, thereby causing the mounting frame 2021 to move upward as a whole. At this time, the springs inside the second spring telescopic rods 21 will be stretched. When the unloading plate 7 contacts the bushing, causing the bushing to disengage from the pressure rod 102, the mounting frame 2021 will reset under the action of the second spring telescopic rods 21. Thus, when the pressure rod 102 moves upward after hole enlargement, the clamping part 202 does not need to release the clamping of the bushing, ensuring smooth operation during use.

[0029] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A tool for machining a bushing, characterized by, The utility model relates to a sleeve metal chip removing device, including: Upper die assembly (1) including mounting plate (101), a plurality of pressure rod (102) are installed on mounting plate (101), a plurality of pressure rod (102) have a reaming area (103) on the periphery side, a plurality of reaming area (103) are located at different heights respectively, Lower die assembly (2) including base (201), a plurality of clamping pieces (202) are installed on base (201), and clamping piece (202) is used for clamping the outer periphery side of bush, and the support assembly (3) for being contacted with the bottom end of bush is installed on base (201), Wherein, clamping piece (202) has two pressure holding parts, clamping piece (202) is driven to move two pressure holding parts, normally, support assembly (3) is attached to the bottom surface of bush, and pressure rod (102) continues to pass through support assembly (3) after passing through the bush that is clamped to form the metal chip in bush and pass through support assembly (3).

2. A bushing machining tool as set forth in claim 1, characterized by A plurality of guide rods (4) are vertically arranged on the base (201), a return spring (5) is sleeved on the guide rod (4), a limiting plate (6) is installed on the base (201), a discharging plate (7) is slidably sleeved between the guide rods (4), the discharging plate (7) is located above the clamping piece (202) and a plurality of perforations for the pressure rod (102) to pass through are formed in the top surface of the discharging plate (7), and the top end of the return spring (5) abuts against the discharging plate (7).

3. A bushing machining tool as set forth in claim 1, characterized by The clamping piece (202) includes a mounting frame (2021) mounted on the base (201), two sliding frames (2022) are symmetrically and slidably mounted on the mounting frame (2021), V-shaped clamping plates (2023) are horizontally arranged on opposite sides of the sliding frame (2022), the inner V surface of the clamping plate (2023) is used for clamping the bush, and a transmission assembly (8) is installed on the mounting frame (2021) and used for driving the two sliding frames (2022) to move closer to or away from each other.

4. A bushing machining tool as set forth in claim 3 wherein, The transmission assembly (8) includes a positive and negative screw rod (801) horizontally and rotatably mounted on the mounting frame (2021), and the sliding frame (2022) is threadedly sleeved on the positive and negative screw rod (801).

5. A bushing machining tool as set forth in claim 1, characterized by The support assembly (3) includes two support plates (301) mounted on the base (201), load bearing plates (302) are elastically and rotatably mounted on opposite sides of the support plate (301), limiting convex plates (303) are arranged on the support plate (301) and used for keeping the load bearing plate (302) horizontal in the normal state, the clamping pieces (202) are arrayed along the axis direction of the load bearing plate (302), and the bottom end of the clamped bush is in contact with the two load bearing plates (302).

6. A bushing machining tool as set forth in claim 5 wherein, An installation groove (18) is formed in the support plate (301), a sliding block (19) is slidably installed in the installation groove (18), a reset spring (20) is installed between the sliding block (19) and the installation groove (18), and a hinge rod (17) is hingedly connected between the sliding block (19) and the load bearing plate (302).

7. A bushing machining tool as set forth in claim 2 wherein, The base (201) is provided with a box body (9), two installation rollers (10) are obliquely arranged and rotatably installed in the box body (9), a synchronous wheel (11) is sleeved on each installation roller (10), a synchronous belt (12) is installed between the two synchronous wheels (11), a chip removal groove (13) is formed in the box body (9) at a position close to the lowest position of the upper surface of the synchronous belt (12), a collecting box (14) is installed on the base (201), and a transmission mechanism (15) for driving the installation rollers (10) to rotate is installed on the base (201).

8. A bushing machining tool as set forth in claim 7 wherein, The transmission mechanism (15) comprises a touch plate (1501) which is elastically and vertically slidably installed on the base (201), the bottom of the discharge plate (7) is provided with an actuator block (1502) for contacting the touch plate (1501), a linkage member (16) is installed between the touch plate (1501) and the installation roller (10), and when the touch plate (1501) moves downward, the installation roller (10) is driven to rotate in one direction through the linkage member (16).

9. A bushing machining tool as set forth in claim 8 wherein, The linkage member (16) comprises a moving block (1601) which is horizontally slidably installed on the base (201), a belt pulley assembly (1602) which is inclined at the same angle as the synchronous belt (12) is installed between the installation rollers (10), a plurality of forcing blocks (1603) are circularly arranged on the outer circumferential side of the belt pulley assembly (1602), a linkage rod (1604) is hingedly connected between the moving block (1601) and the touch plate (1501), a first spring telescopic rod (1605) is installed on the bottom surface of the moving block (1601), the telescopic end of the first spring telescopic rod (1605) is vertically downward and is provided with a wedge-shaped block (1606), and when the moving block (1601) moves horizontally along the direction in which the belt pulley assembly (1602) is inclined downward, the side plane of the wedge-shaped block (1606) is in contact with the forcing block (1603).

10. A bushing machining tool as set forth in claim 3 wherein, The installation frame (2021) is provided with a plurality of groups of second spring telescopic rods (21), each group of second spring telescopic rods (21) comprises four second spring telescopic rods, and the top telescopic ends of the second spring telescopic rods are installed on the installation frame (2021).

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