Slitting tool for annular plastic bearing

Abstract

A slitting tool for an annular plastic bearing comprises a base used for bearing equipment, a mounting assembly connected with the base and a slitting assembly used for cutting the annular plastic bearing. The slitting assembly is installed on a punching machine, the punching machine comprises a punch and a machine table, the punch is connected with the slitting assembly and used for driving the slitting assembly to do reciprocating motion, and the machine table is connected with the base and used for bearing the base. The mounting assembly comprises a bearing rod, a buffer sleeve and a guide sleeve. The slitting assembly comprises a blade. The guide sleeve is used for enabling the annular plastic bearing to be conveniently and rapidly arranged on the buffer sleeve in a sleeving mode, so that follow-up cutting operation is facilitated, and the production cutting efficiency of enterprises is improved. The buffering sleeve is used for bearing the annular plastic bearing and protecting the blade when the blade cuts the annular plastic bearing, and therefore the service life of the blade is prolonged.

Description

A cutting tool for ring-shaped plastic bearings Technical Field

[0001] This utility model belongs to the field of cutting mold technology, and in particular to a cutting tool for the ring-shaped plastic bearing. Background Technology

[0002] Plastic bearings are bearings made of engineering plastics. They are typically used in rotary or linear motion applications to reduce friction and support the movement of mechanical components. Compared to traditional metal bearings, plastic bearings offer advantages such as a low coefficient of friction, high wear resistance, corrosion resistance, and noise reduction, leading to their widespread use in various industries.

[0003] Existing plastic bearings are generally injection molded, thus typically forming a single, complete ring structure. However, the size of this type of bearing results in a tight fit with the bearing housing, making it difficult to easily insert the bearing into the housing. Even if it is forced into place, subsequent repairs and replacements after bearing failure are inconvenient. This inconvenience for both installation and maintenance necessitates the cutting of ring-shaped plastic bearings.

[0004] For example, in the utility model patent with publication number CN220388038U, during cutting, the pull rod type pressure plate needs to be pulled first to compress the spring, then the bearing is placed on the placement groove, and then the pull rod is released, and the spring force causes the pressure plate to press the bearing in place. The procedure for installing and placing the bearing is cumbersome, the production efficiency of the product is low, and it indirectly increases the production cost of the enterprise, which is not conducive to improving the enterprise's production efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a cutting fixture for annular plastic bearings to solve the above problems.

[0006] A cutting fixture for cutting annular plastic bearings. The cutting fixture includes a base for supporting the fixture, a mounting assembly connected to the base and used to mount the annular plastic bearing, and a cutting assembly spaced apart from the mounting assembly and used to cut the annular plastic bearing. The base includes a base plate, a reinforcing plate disposed on the base plate, and a mounting plate disposed on the base plate. The reinforcing plate has an insertion through hole, and the mounting plate has an installation through hole. The mounting assembly includes a support rod inserted into the mounting plate and the reinforcing plate, a buffer sleeve sleeved on the support rod, and a guide sleeve sleeved on the support rod. The guide sleeve is a hollow frustum sleeve, including a clearance portion on its outer surface. The outer diameter of the guide sleeve facing the buffer sleeve is equal to the outer diameter of the buffer sleeve, and the area of ​​the guide sleeve facing the buffer sleeve is larger. The guide sleeve abuts against one end of the buffer sleeve, and the abutment of the guide sleeve and the buffer sleeve forms a seamless transition. The cutting assembly includes a blade for cutting the annular plastic bearing. The blade is used to cut the annular plastic bearing on the buffer sleeve. The buffer sleeve and the guide sleeve are made of non-metallic material and are used to protect the blade during cutting.

[0007] Furthermore, the base plate also includes a groove disposed on the base plate for placing the reinforcing plate.

[0008] Furthermore, the mounting through hole is a stepped hole, and the side facing the reinforcing plate is smaller. The axis of the mounting through hole and the axis of the insertion through hole are on the same straight line.

[0009] Furthermore, the support rod includes a support rod body, a stepped portion disposed on the support rod body, an external thread formed on the support rod body and facing one end of the reinforcing plate, and a nut sleeved on the support rod. The support rod is made of metal material.

[0010] Furthermore, one end of the buffer sleeve abuts against the mounting plate, the inner ring radius of the buffer sleeve is approximately the same as the hole radius of the bearing rod body, and the buffer sleeve is made of non-metallic materials such as rubber.

[0011] Furthermore, the inner diameter of the guide sleeve is approximately the same as the outer diameter of the bearing rod body.

[0012] Furthermore, each of the aforementioned clearance sections is parallel to the base plate.

[0013] Furthermore, the slitting assembly also includes a shaft connected to the blade and a connecting seat connected to the shaft.

[0014] Furthermore, the shaft includes at least one slot disposed on the shaft for receiving the blade, and at least one pair of fixing holes disposed on the shaft.

[0015] Furthermore, the axial direction of the fixing hole is perpendicular to the axial direction of the shaft.

[0016] Compared with existing technologies, the cutting fixture for annular plastic bearings provided by this utility model utilizes a buffer sleeve made of non-metallic material. This buffer sleeve cushions and protects the blade as it cuts the annular bearing and reaches the buffer sleeve, preventing damage to the blade. Simultaneously, the guide sleeve facilitates the quick and easy insertion of the annular plastic bearing onto the buffer sleeve, enabling rapid installation and positioning of the bearing. This simplifies subsequent cutting operations and improves the company's production efficiency and economic benefits. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the slitting fixture for annular plastic bearings provided by this utility model.

[0018] Figure 2 is an exploded structural diagram of the cutting fixture for annular plastic bearings provided by this utility model.

[0019] Figure 3 is an exploded structural diagram of the slitting component provided by this utility model. Detailed Implementation

[0020] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0021] Figures 1 and 3 show schematic diagrams of a cutting fixture for annular plastic bearings provided by this utility model. The cutting fixture for annular plastic bearings 100 is used to cut the bearings. It includes a base 10 for supporting the fixture, a mounting assembly 20 connected to the base 10 for placing the annular plastic bearing 100, and a cutting assembly 30 spaced apart from the mounting assembly 20 for cutting the bearings. The cutting fixture also includes other functional modules, such as assembly components and mounting components, which are technologies known to those skilled in the art and will not be described in detail here.

[0022] It should be noted that the slitting fixture for the annular plastic bearing is mounted on a punch press 200. The punch press 200 itself is existing technology, and its core structure includes a frame, a machine base, a slide block, a punch, a crank mechanism, a transmission system, and a control system. In this embodiment, the slitting assembly 30 is fixedly mounted on the punch 201 of the punch press 200, thereby reciprocating under the drive of the punch 201 to complete the slitting purpose. The base 10 is fixedly mounted on the machine base 202 of the punch press 200, thereby being fixedly mounted on the table surface of the machine base 202 to support the equipment.

[0023] The base 10 includes a base plate 11 for supporting the equipment, a reinforcing plate 12 disposed on the base plate 11, and a mounting plate 13 disposed on the base plate 11.

[0024] The base plate 11 is fixed to the machine base 202 and is used to support the equipment placed on it. The base plate 11 can be a cuboid plate. Preferably, the base plate 11 can be made of metal materials such as steel, thereby having better load-bearing capacity. A groove 111 for accommodating the reinforcing plate 12 is provided on the base plate 11. The base plate 11 can be clamped and fixed to the machine base 202, such as by fasteners such as bolts, which is well known to those skilled in the art and will not be described in detail here.

[0025] The reinforcing plate 12 is fixedly mounted on the groove 111 by fasteners. The reinforcing plate 12 also has a through hole 121. The reinforcing plate 12 can be a cuboid plate, and can be made of metal materials such as iron, thus having higher strength. The reinforcing plate 12 is fixedly connected to the base plate 11. The connection method between the reinforcing plate 12 and the base plate 11 is varied, including welding or bolting, etc., and is not specifically limited here. In this embodiment, the connection method between the reinforcing plate 12 and the base plate 11 is bolting. It is conceivable that both the reinforcing plate 12 and the base plate 11 have corresponding bolt holes.

[0026] The insertion through hole 121 can be a circular through hole for the bearing rod 21 described below to pass through. The insertion through hole 121 is used to cooperate with the mounting through hole 131 described below to fix the bearing rod 21 on the mounting plate 13. Its specific working principle will be explained below in conjunction with the bearing rod 21.

[0027] The mounting plate 13 is provided with a mounting through hole 131. The mounting plate 13 is also made of metal materials such as steel, thus having higher strength.

[0028] The mounting plate 13 is disposed on the base plate 11 and fixedly connected to the base plate 11. The connection method between the mounting plate 13 and the base plate 11 can be varied, including welding or bolting, and is not specifically limited here. In this embodiment, the mounting plate 13 and the base plate 11 are connected by bolts. It is conceivable that both the mounting plate 13 and the base plate 11 have corresponding bolt holes. The mounting through hole 131 is a stepped hole, smaller on the side facing the reinforcing plate 12 and larger on the side away from the reinforcing plate 12. The mounting through hole 131 is used to cooperate with the reinforcing hole 121 to fix the bearing rod 21 on the mounting plate 13. Its specific working principle will be described below in conjunction with the bearing rod 21. Preferably, the axis of the mounting through hole 131 and the axis of the insertion through hole 121 are on the same straight line.

[0029] The mounting assembly 20 is used to fit the processed annular plastic bearing 100. In existing bearing manufacturing processes, plastic bearings are generally injection molded, and therefore typically have a complete annular structure. However, in terms of size, the plastic bearing fits tightly into the bearing housing, making it difficult to easily insert the bearing into the housing and inconvenient for later maintenance and replacement. This is detrimental to both installation and subsequent maintenance. Therefore, it is necessary to cut the annular plastic bearing 100 to facilitate its installation and replacement.

[0030] The mounting assembly 20 includes a support rod 21 inserted and fixed on the mounting plate 12, a buffer sleeve 22 sleeved on the support rod 21, and a guide sleeve 23 sleeved on the support rod 22.

[0031] The support rod 21 passes through the insertion through hole 121 and the mounting through hole 131 and is connected to the reinforcing plate 12 and the mounting plate 13. The support rod 21 is used to support the buffer sleeve 22 and the guide sleeve 23. The support rod 21 can be made of metal materials such as steel, thus having better load-bearing capacity.

[0032] The support rod 21 includes a support rod body 211, a stepped portion 212 disposed on the support rod body 211, an external thread 213 formed on the support rod body 211 facing the reinforcing plate 12, and a nut 214 sleeved on the support rod body.

[0033] The support rod body 211 is a cylinder. The end of the support rod body 211 facing the reinforcing plate 12 is threaded. The radius of the support rod body 211 is equal to the radius of the insertion through hole 121.

[0034] The stepped portion 212 is an annular body disposed on the outside of the bearing rod body 211.

[0035] The support rod 21 passes through the mounting through hole 131 and the insertion through hole 121 in sequence until the stepped portion 212 abuts against the stepped mounting through hole 131. The other end of the support rod 211 passes through the insertion through hole 121, and then a nut 214 is screwed onto the external thread 213, thereby fixing the support rod 21 to the reinforcing plate 12 and the mounting plate 13.

[0036] The buffer sleeve 22 is a circular ring sleeve, which is fitted onto the support rod 21 and abuts against the mounting plate 13. The inner diameter of the buffer sleeve 22 is approximately the same as the outer diameter of the support rod body 211, thereby allowing the buffer sleeve 22 to fit tightly against the support rod body 211. The buffer sleeve 22 can be made of non-metallic materials such as rubber, silicone, or plastic, thus providing good cushioning capability. The buffer sleeve 22 is used to cooperate with the guide sleeve 23 described below to fit the annular plastic bearing 100; the specific cooperation principle will be described below in conjunction with the guide sleeve 23.

[0037] The guide sleeve 23 is a hollow frustum sleeve, which is fitted onto the support rod body 211 and abuts against one end of the buffer sleeve 22. The guide sleeve 23 also includes at least one clearance portion 231 formed on the side of the guide sleeve 23. The inner diameter of the guide sleeve 23 is approximately the same as the outer diameter of the support rod body 211, allowing the guide sleeve 23 to fit tightly against the support rod body 211. The guide sleeve 23 is also made of non-metallic materials such as rubber and plastic, thus providing good cushioning capability.

[0038] The guide sleeve 23 has a larger lower surface area on the side facing the buffer sleeve 22 and a smaller upper surface area on the side away from the buffer sleeve 22. A guide slope is formed between the lower and upper surfaces of the guide sleeve 23, facing the free end, facilitating the insertion of the annular plastic bearing 100. The outer diameter of the guide sleeve 23 facing the buffer sleeve 22 is equal to the outer diameter of the buffer sleeve 22. Therefore, when the guide sleeve 23 abuts against the buffer sleeve 22, a seamless transition is formed at the contact point. The guide sleeve 23 allows the annular plastic bearing 100 to be quickly fitted onto the buffer sleeve 22 for cutting operations, improving the efficiency of fitting the plastic bearing 100.

[0039] The annular plastic bearing 100 slides toward the buffer sleeve 22 via the guide sleeve 23 until it is fitted onto the buffer sleeve 22. It is easy to see that the inner diameter of the annular plastic bearing 100 is approximately equal to the maximum outer diameter of the guide sleeve 23 and the outer diameter of the buffer sleeve 22, thereby ensuring that the annular plastic bearing 100 is tightly fitted onto the buffer sleeve 22.

[0040] Each of the aforementioned clearance portions 231 is formed on the side of the guide sleeve 23. The clearance portion 231 is a plane perpendicular to the base plate 11, which facilitates the insertion of the annular plastic bearing 100 onto the buffer sleeve 22.

[0041] The cutting assembly 30 includes a blade 31 for cutting the annular plastic bearing 100, a shaft 32 connected to the blade 31, and a connecting seat 33 connected to the shaft 32.

[0042] The blade 31 can be made of metal materials such as steel. Its direction of movement is perpendicular to the axial direction of the buffer sleeve 22, and the cutting direction of the blade 31 and the axial direction of the buffer sleeve 22 form an angle. This is a process requirement for plastic bearings and will not be described in detail here. When the blade 31 cuts the annular plastic bearing 100 located on the buffer sleeve 22, it will cut off the buffer plastic bearing 100. During cutting, it cannot be guaranteed that the blade 31 will only cut the annular plastic bearing 100. After the blade 31 finishes cutting, part of it will cut into the buffer sleeve 22. Since the buffer sleeve 22 is made of non-metallic material, the buffer sleeve 22 can buffer and protect the blade 31, preventing damage to the blade 31 and thus improving the service life of the blade.

[0043] The shaft 32 includes at least one slot 321 disposed on the shaft 32 for inserting the blade 31, and at least one pair of fixing holes 322 disposed on the shaft 32. The axis of the shaft 32 intersects the axis of the buffer sleeve 22, specifically, the axial direction 32 of the shaft 32 is perpendicular to the axial direction of the buffer sleeve 22.

[0044] The axial direction of the fixing hole 322 is perpendicular to the axial direction of the shaft 32, so that the blade 31 can be clamped by screwing a bolt through the fixing hole 322, thereby fixing the blade 31 on the shaft 32.

[0045] The connecting seat 33 can be a cylinder, which is used to connect the shaft 32 and the punch 201.

[0046] When cutting the annular plastic bearing 100, the punch 201 controls the shaft 32 to move towards the base 10. At this time, the blade 31, fixedly connected in the slot 321, gradually approaches the annular plastic bearing 100 for cutting. After cutting the annular bearing 100, the blade 31 cuts to the buffer sleeve 22. Since the buffer sleeve 22 is made of non-metallic material, it cushions and protects the blade 31, preventing damage. After finally cutting the annular plastic bearing 100, the punch 201 again manipulates the shaft 32 to move away from the base 10. The blade 31 then moves back to its original position for the next cut. That is, once the blade 31 has moved to a safe distance, the annular plastic bearing 100 can be removed, and a new annular plastic bearing 100 can be inserted to continue the cutting operation. The punch 201 can also control the shaft 32 to rotate around its axis, thereby changing the cutting direction of the blade 31 fixedly connected to the shaft 32, and thus changing the oblique cut direction of the annular plastic bearing 100. The annular plastic bearing 100 with different oblique cut angles can be cut according to actual production needs.

[0047] Compared with the prior art, the cutting fixture for annular plastic bearings provided by this utility model uses a buffer sleeve 22 made of non-metallic material. This buffer sleeve 22 provides cushioning protection for the blade 31 when it cuts the annular bearing 100 and reaches the buffer sleeve 22, thus preventing damage to the blade 31. Simultaneously, the guide sleeve 23 facilitates the quick insertion of the annular plastic bearing 100 onto the buffer sleeve 22, enabling rapid installation and positioning of the annular plastic bearing 100, facilitating subsequent cutting operations, and thereby improving the enterprise's production efficiency and economic benefits.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A cutting fixture for annular plastic bearings, characterized in that: The slitting fixture for cutting annular plastic bearings includes a base for supporting the fixture, an assembly connected to the base and used to mount the annular plastic bearing, and a slitting assembly spaced apart from the mounting assembly and used to cut the annular plastic bearing. The base includes a base plate, a reinforcing plate on the base plate, and a mounting plate on the base plate. The reinforcing plate has an insertion through hole, and the mounting plate has an installation through hole. The mounting assembly includes a bearing rod inserted into the mounting plate and the reinforcing plate, a buffer sleeve fitted onto the bearing rod, and a slitting assembly fitted onto the... The guide sleeve on the bearing rod is a hollow frustum sleeve. The guide sleeve includes a clearance portion disposed on the outer surface of the guide sleeve. The outer diameter of the guide sleeve facing the buffer sleeve is equal to the outer diameter of the buffer sleeve. The area of ​​the guide sleeve facing the buffer sleeve is larger. The guide sleeve abuts against one end of the buffer sleeve. The abutment of the guide sleeve and the buffer sleeve forms a seamless transition. The cutting assembly includes a blade for cutting the annular plastic bearing. The blade is used to cut the annular plastic bearing on the buffer sleeve. The buffer sleeve and the guide sleeve are made of non-metallic material and are used to protect the blade during cutting.

2. The slitting tooling for annular plastic bearings of claim 1, wherein: The base plate also includes a groove disposed on the base plate for placing the reinforcing plate.

3. The slitting tooling for annular plastic bearings of claim 1, wherein: The mounting through hole is a stepped hole, with the side facing the reinforcing plate being smaller. The axis of the mounting through hole and the axis of the insertion through hole are on the same straight line.

4. The slitting tooling for annular plastic bearings of claim 1, wherein: The support rod includes a support rod body, a stepped portion disposed on the support rod body, an external thread formed on the support rod body and facing one end of the reinforcing plate, and a nut sleeved on the support rod. The support rod is made of metal material.

5. The slitting tooling for annular plastic bearings of claim 4, wherein: One end of the buffer sleeve abuts against the mounting plate, and the inner ring radius of the buffer sleeve is approximately the same as the hole radius of the bearing rod body.

6. The cutting fixture for annular plastic bearings as described in claim 4, characterized in that: The inner diameter of the guide sleeve is approximately the same as the outer diameter of the bearing rod body.

7. The slitting tool for annular plastic bearings of claim 1, wherein: Each of the aforementioned clearance sections is parallel to the base plate.

8. The slitting tool for annular plastic bearings of claim 1, wherein: The slitting assembly also includes a shaft connected to the blade and a connecting seat connected to the shaft.

9. The cutting fixture for annular plastic bearings as described in claim 8, characterized in that: The shaft includes at least one slot disposed on the shaft for receiving the blade, and at least one pair of fixing holes disposed on the shaft.

10. The slitting tool for annular plastic bearings according to claim 9, characterized in that: The axial direction of the fixing hole is perpendicular to the axial direction of the shaft.

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