Clamp special for lever part machining

Abstract

The utility model relates to the technical field of automobile part machining, and discloses a special clamp for lever part machining, which comprises a lever part, a table top, a first clamping part, a second clamping part, a third clamping part, a first clamping part, a second clamping part, a third clamping part, a second clamping part, a second clamping part and a third clamping part, the outer wall of the lever part is provided with a first protruding part, a second protruding part and a third protruding part, and the lever part is further provided with a center hole. The outer wall limiting piece is arranged on the table top and abuts against the outer wall of the lever part; the supporting piece is arranged on the table top, makes contact with one side surface of the first protruding part and is used for supporting the side surface, close to the table top, of the first protruding part; and the locking limiting piece is arranged on the table top, one end of the locking limiting piece abuts against the outer wall of the lever part, and the lever part is limited and fixed through the locking limiting piece and the outer wall limiting piece. The special clamp for lever part machining aims at being specially designed for lever part machining, and the stability, accuracy and safety of the lever part in the machining process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing, in particular to a special clamp for processing lever parts. Background Art

[0002] For the lever parts in automobile parts, the casting blank is used as the basic material. After the fine milling process, the upper and lower planes of the parts have reached the high-precision processing requirements. Next, it is necessary to Figure 2 The surfaces of the first protrusion (11), the second protrusion (12) and the third protrusion (13) are machined with corresponding holes.

[0003] Since lever parts are special-shaped parts, their unique shape and size make traditional three-jaw chucks, flat-nose pliers and other general-purpose clamps face significant technical challenges and defects in the clamping process. These general-purpose clamps were originally designed to cope with standardized and regularly shaped workpieces. However, the non-standard form of lever parts, such as curved rods, irregular cross-sections or specific mounting holes, makes it difficult for traditional clamps to provide stable and precise clamping effects. Specifically, three-jaw chucks usually clamp workpieces through three movable jaws, but their adaptability to the shape of the workpiece is limited, and it is difficult to fit tightly to the complex curved surfaces of lever parts, which may result in loose clamping or workpiece displacement during processing. Flat-nose pliers are more suitable for flat or nearly flat workpieces. For components with three-dimensional structures such as lever parts, their clamping effect is greatly reduced, and processing accuracy and safety cannot be guaranteed. Utility Model Content

[0004] The utility model aims to provide a fixture specially designed for machining lever parts, aiming to improve the stability, accuracy and safety of the lever parts during the machining process, and proposes a special fixture for machining lever parts.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A special fixture for machining a lever part, comprising a lever part, wherein a first protrusion, a second protrusion, and a third protrusion are provided on an outer wall of the lever part, and a center hole is also provided on the lever part, and further comprising:

[0007] A table top is provided below the lever part;

[0008] An outer wall limiter is provided on the table and abuts against the outer wall of the lever component;

[0009] a support member disposed on the table and in contact with one side surface of the first protrusion, for supporting the side surface of the first protrusion close to the table;

[0010] A locking limiter is provided on the table top and one end of which abuts against the outer wall of the lever part, wherein the locking limiter and the outer wall limiter are used to limit and fix the lever part, and the locking limiter can also support the lower part of the second protrusion;

[0011] The axial limiting member is arranged on the table surface and abuts against and limits the third protrusion, wherein the axial limiting member can also be used to limit the axial rotation displacement of the lever part.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, a through hole is opened at the center of the table top, and a support sleeve is connected to the through hole by interference fit. A limiting hole is processed at the center of the support sleeve and is coaxially arranged with the center hole, wherein the inner diameter of the limiting hole is the same as that of the center hole.

[0014] Furthermore, the outer wall limiter includes:

[0015] The L-shaped limiter has a vertical end in contact with one side surface of the table top;

[0016] A first fixing bolt is provided on the L-shaped limiter and is connected to the table top, wherein the L-shaped limiter is connected to the table top via the first fixing bolt; and

[0017] The V-shaped notch groove is opened at the horizontal end of the L-shaped limiter, wherein the lever part is placed on the inner side of the V-shaped notch groove.

[0018] Furthermore, the support member includes:

[0019] A mounting base, fixedly mounted on one side surface of the table;

[0020] an elastic member, one end of which is fixedly mounted on the inner side of the mounting seat; and

[0021] The movable washer is arranged on the inner side of the mounting seat and is fixedly connected to the other end of the elastic member. The cross-section of the movable washer is inclined, and the movable washer can be placed under the first protrusion under the elastic force of the elastic member to support the bottom of the first protrusion upward.

[0022] Furthermore, the locking limiter includes:

[0023] a threaded seat, the threaded seat being fixed to one side surface of the table top by a first screw;

[0024] A push screw threadedly connected to the inner side of the threaded seat; and

[0025] The V-shaped limiting piece is arranged on the other end of the pushing screw, wherein under the driving of the pushing screw, the V-shaped limiting piece can abut against the outer side of the lever part.

[0026] Furthermore, two guide seats are connected to the surface of the table near the lever part through a second screw, wherein the two guide seats are respectively located on both sides of the V-shaped limiter, and the surfaces on the opposite sides of the two guide seats are processed with guide grooves that are compatible with the V-shaped limiter.

[0027] Furthermore, a pushing hole that is arranged in a T-shape as a whole is processed on the surface of one side of the V-shaped limiter close to the pushing screw, and a pushing member is fixedly installed on the end of one side of the pushing screw close to the V-shaped limiter, wherein the pushing member is located on the inner side of the pushing hole.

[0028] Furthermore, the axial limiting member includes:

[0029] A fixing seat, the fixing seat being fixed to one side surface of the table top by a second screw;

[0030] An L-shaped base, with a transverse end fixedly mounted on a surface of a side of the fixing base away from the lever part;

[0031] a spring, one end of which is fixedly mounted on the vertical surface of the L-shaped base; and

[0032] The V-shaped fixing piece is provided on the fixing seat and is fixedly connected with the other end of the spring. The V-shaped fixing piece can abut against the outer side of the third protrusion under the abutment of the spring.

[0033] Furthermore, a hole adapted to the V-shaped fixing piece is processed on the surface of the fixing seat, and the V-shaped fixing piece is located inside the hole.

[0034] Furthermore, both side ends of the table top are processed with connection grooves for fixing the table top.

[0035] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0036] By designing a specific combination of outer wall limiters and locking limiters, this clamp can fit tightly against the outer wall and specific protrusions of the lever parts, thereby realizing multi-point and all-round limiting fixation of the lever parts. This design not only improves the adaptability of the clamp to the shape of the lever parts, but also ensures the stability and firmness of the clamping, and effectively prevents displacement or vibration caused by loose fit between the clamp and the parts during processing, thereby ensuring processing accuracy. Secondly, in response to the problem that traditional clamps are difficult to provide effective support for irregular cross-sections or protrusions of lever parts, this clamp innovatively sets a dual support mechanism of support members and locking limit members. The support members are specifically used to support the side surface of the first protrusion close to the table top, while the locking limit member can provide additional support to the bottom of the second protrusion while limiting and fixing. This dual support structure not only increases It strengthens the supporting ability of the fixture for the overall structure of the lever part, further improves the stability of clamping, and reduces the processing errors caused by insufficient support. In addition, the axial limiter effectively limits the axial rotational displacement of the lever part during the processing by abutting and limiting with the third protrusion. This design solves the problem that traditional fixtures are difficult to control their rotational freedom when processing rotationally symmetrical parts, and ensures the positioning accuracy and processing quality of the lever parts during the processing. In summary, the proposed special fixture for processing lever parts, through its unique multi-point limit fixation, dual support structure and axial limit design, successfully overcomes the technical difficulties faced by traditional fixtures in processing lever parts, and realizes efficient, stable and precise clamping of lever parts, providing a more advanced and reliable fixture solution for the field of automotive parts processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall connection structure of the utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the lever part of the utility model;

[0039] Figure 3 This is a schematic diagram of the cross-sectional connection structure of the support member of the present invention;

[0040] Figure 4 This is a schematic diagram of the overall connection structure of the utility model from another perspective;

[0041] Figure 5 This is a schematic diagram of the connection structure between the guide seat and the guide groove of the utility model.

[0042] In the figure: 1. Lever part; 11. First protrusion; 12. Second protrusion; 13. Third protrusion; 14. Center hole; 2. Table; 3. Outer wall limiter; 31. L-shaped limiter; 32. First fixing bolt; 33. V-shaped notch; 4. Support member; 41. Mounting seat; 42. Elastic member; 43. Movable washer; 5. Locking limiter; 51. Threaded seat; 52. Push screw; 53. V-shaped limiter; 6. Axial limiter; 61. Fixing seat; 62. L-shaped base; 63. Spring; 64. V-shaped fixing member; 7. Through hole; 8. Support sleeve; 9. Guide seat; 10. Guide groove. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] Combine Figure 1-Figure 5 As shown, the utility model is a special fixture for processing lever parts, including a lever part 1, wherein the outer wall of the lever part 1 is provided with a first protrusion 11, a second protrusion 12 and a third protrusion 13, and the lever part 1 is also provided with a center hole 14, and further includes:

[0045] The table 2 is arranged below the lever part 1;

[0046] The outer wall limiter 3 is provided on the table 2 and abuts against the outer wall of the lever part 1;

[0047] The support member 4 is disposed on the table top 2 and contacts one side surface of the first protrusion 11, and is used to support the side surface of the first protrusion 11 close to the table top 2;

[0048] A locking limiter 5 is provided on the table 2 and one end of the locking limiter 5 abuts against the outer wall of the lever part 1. The locking limiter 5 and the outer wall limiter 3 are used to limit and fix the lever part 1. The locking limiter 5 can also support the lower side of the second protrusion 12.

[0049] The axial limiting member 6 is disposed on the table 2 and abuts against and limits the third protrusion 13 . The axial limiting member 6 can also be used to limit the axial rotation displacement of the lever component 1 .

[0050] First, the lever part 1 is placed on the table 2 of the fixture. The table 2 serves as the basic support surface of the entire fixture to ensure that the lever part 1 is on a stable working plane. Then, the outer wall limiter 3 is set on the table 2 and tightly abuts against the outer wall of the lever part 1. This design preliminarily limits the horizontal movement freedom of the lever part 1 through physical contact, providing a basis for subsequent precise positioning and clamping. In order to further enhance the stability of the lever part 1, the support member 4 is set on the table 2 and contacts one side surface of the first protrusion 11. The main function of the support member 4 is to effectively support the side surface of the first protrusion 11 close to the table 2 to prevent it from deformation or displacement due to uneven force during processing. , then, the locking limit piece 5 is installed on the table 2, and one end of it abuts against the outer wall of the lever part 1. Through the coordinated action of the locking limit piece 5 and the outer wall limit piece 3, the lever part 1 is firmly limited and fixed in the fixture. In addition, the locking limit piece 5 also has an additional function, that is, it can support the bottom of the second protrusion 12. This double support design further improves the stability of the lever part 1 during the processing. Finally, the axial limit piece 6 is set on the table 2 and abuts and limits each other with the third protrusion 13. The main function of the axial limit piece 6 is to limit the axial rotational displacement of the lever part 1 during the processing process, ensuring that it remains fixed in the processing direction. This design is of great significance for ensuring processing accuracy and avoiding processing errors.

[0051] In a preferred embodiment, the present invention can be further configured as follows: a through hole 7 is opened at the center of the table top 2, and the through hole 7 is connected to a support sleeve 8 by interference fit. A limiting hole is processed at the center of the support sleeve 8 and is coaxially arranged with the center hole 14, wherein the limiting hole has the same inner diameter as the center hole 14. A through hole 7 is specially designed and opened at the center of the table top 2, and this through hole 7 is connected to a support sleeve 8 by interference fit. The interference fit ensures a tight connection between the support sleeve 8 and the table top 2, prevents loosening caused by vibration or external force, and the support sleeve 8 is A limiting hole is carefully processed at the center. This limiting hole is coaxially arranged with the center hole 14 on the lever part 1, and the inner diameters of the two are exactly the same. This design cleverly utilizes the structural characteristics of the lever part 1 itself to achieve precise alignment between the fixture and the part. When processing the lever part 1, you can choose a rod that matches the inner diameter of the limiting hole, and insert this rod into the limiting hole of the support sleeve 8 and the center hole 14 of the lever part 1 in turn, so as to achieve further fixation between the fixture and the part and effectively prevent the part from being offset during the processing.

[0052] In a preferred embodiment, the present invention can be further configured as follows: the outer wall limiter 3 includes:

[0053] An L-shaped limiting member 31, the vertical end of which contacts one side surface of the table top 2;

[0054] A first fixing bolt 32 is provided on the L-shaped limiting member 31 and connected to the table top 2 , wherein the L-shaped limiting member 31 is connected to the table top 2 via the first fixing bolt 32 ; and

[0055] The V-shaped notch groove 33 is opened at the horizontal end of the L-shaped limiter 31, wherein the lever part 1 is placed on the inner side of the V-shaped notch groove 33. The outer wall limiter 3 is an important component of the fixture, which is intended to limit the lateral movement of the lever part 1 during the processing to ensure the processing accuracy. It is mainly composed of three key components: the L-shaped limiter 31, the first fixing bolt 32 and the V-shaped notch groove 33. First, the L-shaped limiter 31 has a unique L-shaped structure, and its vertical end is in close contact with one side surface of the table 2. This design enables the L-shaped limiter 31 to stand firmly on the table, providing a basis for subsequent fixation and limitation. Then, the L-shaped limiter 31 is fixed by the first fixing bolt 32 set on the L-shaped limiter 31. The limiter 31 is firmly connected to the table top 2. This step is crucial because it ensures that the L-shaped limiter 31 will not move or tilt due to external forces during the processing, thereby ensuring the stability of the lever part 1 processing. Finally, a V-shaped notch groove 33 is opened at the lateral end of the L-shaped limiter 31. The design of this V-shaped notch groove 33 cleverly utilizes the self-centering characteristics of the V-shaped structure, so that the lever part 1 can be easily placed inside it and can automatically adjust its position to a certain extent to achieve the best limiting effect. During the processing, the V-shaped notch groove 33 fits tightly to the outer wall of the lever part 1, effectively preventing the part from lateral displacement during processing, and ensuring processing accuracy and surface quality.

[0056] In a preferred embodiment, the present invention can be further configured as follows: the support member 4 includes:

[0057] The mounting base 41 is fixedly mounted on one side surface of the table top 2;

[0058] an elastic member 42 , one end of which is fixedly mounted on the inner side of the mounting seat 41 ; and

[0059] The movable washer 43 is arranged on the inner side of the mounting seat 41 and is fixedly connected to the other end of the elastic member 42. The cross-section of the movable washer 43 is inclined, wherein the movable washer 43 can be placed under the first protrusion 11 under the elastic force of the elastic member 42 to support the first protrusion 11 from the bottom upward. The support member 4 is mainly composed of three key components: the mounting seat 41, the elastic member 42 and the movable washer 43. First, the mounting seat 41 is fixedly installed on one side surface of the table 2 to provide a stable base for the subsequent support structure. On the inner side of the mounting seat 41, one end of the elastic member 42 is firmly fixed. The elastic member 42 is preferably a spring so that it can produce appropriate deformation when subjected to external force and quickly return to its original state after the external force disappears. The movable washer 43 is arranged at The inner side of the mounting seat 41 is fixedly connected to the other end of the elastic member 42. It is worth noting that the cross-section of the movable washer 43 is tilted. This design enables it to produce corresponding rotation or displacement when subjected to forces of different directions or magnitudes, thereby adapting to the shape and position changes of the first protrusion 11 on the lever part 1. During processing, when the lever part 1 is placed on the table 2, its first protrusion 11 will contact the movable washer 43. At this time, under the elastic force of the elastic member 42, the movable washer 43 will automatically adjust its position to ensure that it can fit tightly under the first protrusion 11. This bottom-up support method not only effectively prevents the lever part 1 from shaking or tilting during processing, but also ensures the processing accuracy and surface quality of the first protrusion 11.

[0060] In a preferred embodiment, the present invention can be further configured as follows: the locking limiter 5 includes:

[0061] A threaded seat 51, the threaded seat 51 is fixed to one side surface of the table top 2 by a first screw;

[0062] A push screw 52 is threadedly connected to the inner side of the threaded seat 51; and

[0063] The V-shaped limiter 53 is arranged on the other end of the pushing screw 52, ​​wherein the V-shaped limiter 53 can abut against the outer side of the lever part 1 under the drive of the pushing screw 52. The locking limiter 5 is mainly composed of three key components: the threaded seat 51, the pushing screw 52 and the V-shaped limiter 53. First, the threaded seat 51 is firmly fixed on one side surface of the table 2. This is achieved by the first screw, which ensures the stability of the threaded seat 51 during the processing. Then, the pushing screw 52 is threadedly connected to the inner side of the threaded seat 51. This threaded connection design allows the user to push the screw 5 by rotating it. 2 to accurately control its position in the threaded seat 51. When the pushing screw 52 rotates and moves forward, it drives the V-shaped limiter 53 connected to it to move together. The V-shaped limiter 53 is arranged on the other side end of the pushing screw 52. Its shape design utilizes the self-centering characteristics of the V-shaped structure, so that it can closely and evenly abut against the outer side of the lever part 1. Driven by the pushing screw 52, ​​the V-shaped limiter 53 can accurately move to the predetermined position of the lever part 1 and exert a stable limiting force on the lever part 1 through its V-shaped structure, thereby preventing it from lateral displacement or rotation during the processing process.

[0064] In a preferred embodiment, the present invention can be further configured as follows: two guide seats 9 are connected to the surface of the side of the table 2 close to the lever part 1 by a second screw, wherein the two guide seats 9 are respectively located on both sides of the V-shaped limiter 53, and the surfaces of the two guide seats 9 on opposite sides are processed with guide grooves 10 that are compatible with the V-shaped limiter 53. On the surface of the side of the table 2 close to the lever part 1, two guide seats 9 are connected by a second screw. The arrangement of the two guide seats 9 is very critical. They are respectively located on both sides of the V-shaped limiter 53 to form a stable support and guiding structure. The surfaces of the opposite sides of the guide seats 9 are processed with guide grooves 10 that are compatible with the V-shaped limiter 53. The shapes and sizes of these guide grooves 10 are carefully designed to ensure that the V-shaped limiter 53 can be smoothly And it moves precisely along its length direction. When the pushing screw 52 is subjected to the rotational force and pushed forward, it will drive the V-shaped limiter 53 to move together. At this time, the two side edges of the V-shaped limiter 53 will be respectively embedded in the guide grooves 10 of the two guide seats 9. The restraining effect of the guide grooves 10 enables the V-shaped limiter 53 to remain stable during the movement, avoiding shaking or deviation from the predetermined trajectory. As the pushing screw 52 continues to push, the V-shaped limiter 53 moves forward smoothly along the length direction of the guide grooves 10 until it abuts against the outside of the lever part 1. In this process, the V-shaped limiter 53 not only achieves effective limitation of the lever part 1, but also applies uniform force to the lever part 1 through its V-shaped structure, thereby ensuring the stability and precision of the processing.

[0065] In a preferred embodiment, the present invention can be further configured as follows: a pushing hole in the shape of a T is processed on the surface of one side of the V-shaped limiter 53 close to the pushing screw 52, ​​and a pushing member is fixedly installed on the end of the pushing screw 52 close to the V-shaped limiter 53, wherein the pushing member is located on the inner side of the pushing hole, and a pushing hole in the shape of a T is processed on the surface of one side of the V-shaped limiter 53 close to the pushing screw 52. The design of this pushing hole not only provides a stable accommodating space for the pushing member, but also limits the rotational freedom of the V-shaped limiter 53 in the horizontal direction through its T-shaped structure. At the same time, a pushing member is fixed on the end of one side of the pushing screw 52 close to the V-shaped limiter 53. It is equipped with a pushing member, which is precisely designed and manufactured to ensure that it can fit tightly inside the pushing hole and can effectively transmit power when the pushing screw 52 rotates. When the pushing screw 52 rotates inside the threaded seat 51, due to the cooperation between the pushing member and the pushing hole, the V-shaped limit member 53 will not rotate therewith. On the contrary, the rotational motion of the pushing screw 52 will be converted into linear motion of the pushing member, and then the V-shaped limit member 53 will be displaced through the pushing hole. With the continuous rotation of the pushing screw 52 and the linear motion of the pushing member, the V-shaped limit member 53 will move smoothly along the predetermined direction until it approaches and tightly abuts the outer side of the lever part 1.

[0066] In a preferred embodiment, the present invention can be further configured as follows: the axial limiter 6 includes:

[0067] A fixing base 61, the fixing base 61 is fixed to one side surface of the table top 2 by a second screw;

[0068] An L-shaped base 62, the lateral end of which is fixedly mounted on a surface of the fixing base 61 away from the lever part 1;

[0069] a spring 63 , one end of which is fixedly mounted on the vertical surface of the L-shaped base 62 ; and

[0070] The V-shaped fixing part 64 is provided on the fixing seat 61 and is fixedly connected to the other end of the spring 63, wherein the V-shaped fixing part 64 can abut against the outer side of the third protrusion 13 under the abutment of the spring 63, and the fixing seat 61 serves as the basic supporting component of the axial limit member 6 and is firmly fixed to one side surface of the table 2 by the second screw. This step ensures the stability and reliability of the axial limit member 6 during the processing. Then, the lateral end of the L-shaped base 62 is fixedly mounted on the side surface of the fixing seat 61 away from the lever part 1. The design of the L-shaped base 62 not only provides sufficient strength and rigidity, but also cleverly utilizes its vertical surface to install the spring 63. The spring 63 serves as a key elastic element in the axial limit member 6, and one end thereof is fixedly mounted on the vertical surface of the L-shaped base 62. The selection and installation position of the spring 63 have been carefully considered to ensure that it can Sufficient elastic force is provided to drive the V-shaped fixing member 64 for axial limitation. The V-shaped fixing member 64 is the component in the axial limiting member 6 that directly contacts the lever part 1. It is arranged on the fixing seat 61 and is fixedly connected to the other end of the spring 63. The design of the V-shaped fixing member 64 utilizes the self-centering characteristics of the V-shaped structure, so that it can tightly and evenly abut against the outside of the third protrusion 13 of the lever part 1. During the processing, when the lever part 1 is placed on the table 2, its third protrusion 13 will contact the V-shaped fixing member 64. At this time, under the actuation of the spring 63, the V-shaped fixing member 64 will automatically adjust its position to ensure that it can fit tightly against the outside of the third protrusion 13. This axial limiting method not only effectively prevents the lever part 1 from axial movement or shaking during processing, but also ensures the processing accuracy and surface quality of the hole on the third protrusion 13.

[0071] In a preferred embodiment, the present invention can be further configured as follows: a hole is processed on the surface of the fixing seat 61 to match the V-shaped fixing piece 64, and the V-shaped fixing piece 64 is located on the inner side of the hole. On the surface of the fixing seat 61, a hole is processed to match the shape and size of the V-shaped fixing piece 64. The design of this hole takes into account the V-shaped structure of the V-shaped fixing piece 64 and the deformation and displacement that may occur during the processing to ensure that the V-shaped fixing piece 64 can be smoothly and stably installed inside the hole. The V-shaped fixing piece 64 is a key component of the axial limit piece 6. Its shape design utilizes the self-centering characteristics of the V-shaped structure, so that it can tightly and evenly abut against the outer side of the third protrusion 13 of the lever part 1. During the installation process, the V-shaped fixing piece 64 is precisely placed on the inner side of the hole of the fixing seat 61. Due to the adaptability of the hole and the V-shaped fixing piece 64, the V-shaped fixing piece 64 can maintain a stable posture in the hole and will not shake unnecessarily due to the action of external force.

[0072] In a preferred embodiment, the present invention can be further configured as follows: connecting grooves for fixing the table top 2 are processed on both side ends of the table top 2. In order to ensure the stability and reliability of the table top 2 during the processing, it needs to be firmly fixed to the workbench of the machine tool. In order to achieve this goal, special connecting grooves are processed on both side ends of the table top 2. The shapes and sizes of these connecting grooves are carefully designed to ensure that they can match the corresponding structures on the machine tool workbench. When installing the table top 2 on the machine tool workbench, the table top 2 is first placed in a predetermined position so that the connecting grooves are aligned with the corresponding structures on the machine tool workbench. Then, fasteners such as bolts are used to pass through the connecting grooves and tighten them on the machine tool workbench, so that the table top 2 is firmly fixed to the workbench. This connection method is not only simple and fast, but also very reliable. Through the tightening action of the bolts, a stable mechanical connection is formed between the table top 2 and the machine tool workbench, which can withstand various forces and vibrations generated during the processing.

[0073] The specific working principle of the utility model of a special fixture for processing lever parts is as follows:

[0074] First, the lever part 1 is precisely placed on the table 2 of the fixture. The table 2 serves as the basic support platform of the entire fixture, providing a stable working environment for the lever part 1. To further improve stability, a through hole 7 is opened at the center of the table 2. The through hole 7 is connected to the support sleeve 8 through an interference fit. The limiting hole inside the support sleeve 8 is coaxial with the center hole 14 of the lever part 1 and has the same inner diameter. This design allows the insert rod, which is compatible with the inner diameter of the limiting hole, to be inserted into the limiting hole and the center hole 14 at the same time during the processing, thereby effectively preventing the lever part 1 from deflecting during the processing;

[0075] Next, the outer wall stopper 3 begins to function. The vertical end of the L-shaped stopper 31 is in close contact with the tabletop 2 and is securely fixed to the tabletop 2 via a first fixing bolt 32. A V-shaped notch 33 is formed at the transverse end of the L-shaped stopper 31. The shape of the V-shaped notch 33 matches the outer wall of the lever part 1, allowing the lever part 1 to be securely placed inside the notch. In this way, the outer wall stopper 3 preliminarily limits the horizontal freedom of movement of the lever part 1 through physical contact.

[0076] In order to further enhance the stability of the lever part 1, the support member 4 is cleverly arranged on the table 2, with a mounting seat 41 fixedly mounted on one side surface of the table 2. One end of the elastic member 42 is fixedly mounted on the inner side of the mounting seat 41, and the other end is fixedly connected to the movable washer 43. The cross-section of the movable washer 43 is inclined. Under the elastic force of the elastic member 42, the movable washer 43 can automatically adjust its position and be placed under the first protrusion 11, effectively supporting the first protrusion 11 with the bottom facing upward. This design effectively prevents the first protrusion 11 from being deformed or shifted due to uneven force during processing.

[0077] Subsequently, the locking limiter 5 starts to work. The threaded seat 51 is fixed to the table 2 by the first screw. The pushing screw 52 is threadedly connected to the inner side of the threaded seat 51. The V-shaped limiter 53 is provided on the other end of the pushing screw 52. As the pushing screw 52 rotates, the V-shaped limiter 53 moves smoothly along the guide grooves 10 of the two guide seats 9 on the table 2 under the push of the pushing member until it abuts against the outer side of the lever part 1. At the same time, the V-shaped limiter 53 also supports the lower side of the second protrusion 12. This double support design further improves the stability of the lever part 1.

[0078] Finally, the axial limiter 6 ensures the axial stability of the lever part 1 during the processing. The fixing seat 61 is fixed to the table 2 by a second screw. The lateral end of the L-shaped base 62 is fixedly mounted on the side surface of the fixing seat 61 away from the lever part 1. One end of the spring 63 is fixedly mounted on the vertical surface of the L-shaped base 62, and the other end is fixedly connected to the V-shaped fixing member 64. The V-shaped fixing member 64 passes through the hole set on the fixing seat 61 and is tightly abutted against the outer side of the third protrusion 13 under the action of the spring 63. In this way, the axial limiter 6 effectively limits the axial rotation displacement of the lever part 1 during the processing, ensuring the processing accuracy and avoiding processing errors.

[0079] In summary, the special fixture for processing lever parts realizes efficient, stable and precise clamping and positioning of the lever part 1 through the coordinated work of the table 2, outer wall limiter 3, support part 4, locking limiter 5 and axial limiter 6, providing strong guarantee for subsequent processing operations.

[0080] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0081] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special fixture for machining lever parts, comprising a lever part (1), wherein a first protrusion (11), a second protrusion (12) and a third protrusion (13) are provided on the outer wall of the lever part (1), and a center hole (14) is further provided on the lever part (1), characterized in that: Also includes: A table (2) is arranged below the lever part (1); An outer wall limiting member (3) is arranged on the table (2) and abuts against the outer wall of the lever part (1); A support member (4) is disposed on the tabletop (2) and contacts one side surface of the first protruding portion (11), and is used to support the side surface of the first protruding portion (11) close to the tabletop (2); A locking limiter (5) is provided on the table (2) and one end of which abuts against the outer wall of the lever part (1), wherein the locking limiter (5) and the outer wall limiter (3) are used to limit and fix the lever part (1), and the locking limiter (5) can also support the lower part of the second protrusion (12); The axial limiting member (6) is arranged on the table (2) and abuts against and limits the third protrusion (13), wherein the axial limiting member (6) can also be used to limit the axial rotation displacement of the lever part (1).

2. A special fixture for machining lever parts according to claim 1, characterized in that: A through hole (7) is provided at the center of the table top (2), and a support sleeve (8) is connected to the through hole (7) by interference fit. A limiting hole coaxially arranged with the center hole (14) is processed at the center of the support sleeve (8), wherein the limiting hole and the center hole (14) have the same inner diameter.

3. A special fixture for machining lever parts according to claim 1, characterized in that: The outer wall limiting member (3) comprises: An L-shaped limiting member (31), the vertical end of which contacts one side surface of the table top (2); A first fixing bolt (32) is provided on the L-shaped limiting member (31) and is connected to the table top (2), wherein the L-shaped limiting member (31) is connected to the table top (2) via the first fixing bolt (32); and A V-shaped notch groove (33) is provided at the transverse end of the L-shaped limiting member (31), wherein the lever component (1) is placed inside the V-shaped notch groove (33).

4. A special fixture for machining lever parts according to claim 1, characterized in that: The support member (4) comprises: A mounting base (41) is fixedly mounted on one side surface of the table top (2); an elastic member (42), one end of which is fixedly mounted on the inner side of the mounting seat (41); and A movable washer (43) is arranged on the inner side of the mounting seat (41) and is fixedly connected to the other end of the elastic member (42). The cross section of the movable washer (43) is inclined. Under the elastic force of the elastic member (42), the movable washer (43) can be placed below the first protrusion (11) to support the bottom of the first protrusion (11) upward.

5. The special fixture for machining lever parts according to claim 1, characterized in that: The locking and limiting member (5) comprises: A threaded seat (51), wherein the threaded seat (51) is fixed to one side surface of the table top (2) by a first screw; A push screw (52) is threadedly connected to the inner side of the threaded seat (51); and The V-shaped limiting member (53) is arranged on the other end of the pushing screw (52), wherein the V-shaped limiting member (53) can abut against the outer side of the lever part (1) under the driving of the pushing screw (52).

6. A special fixture for machining lever parts according to claim 5, characterized in that: Two guide seats (9) are connected to the surface of the table (2) on one side close to the lever part (1) through a second screw, wherein the two guide seats (9) are respectively located on both sides of the V-shaped limiter (53), and the surfaces on the opposite sides of the two guide seats (9) are both processed with guide grooves (10) that are compatible with the V-shaped limiter (53).

7. The special fixture for machining lever parts according to claim 5, characterized in that: A pushing hole that is arranged in a T-shape is processed on the surface of one side of the V-shaped limiting member (53) close to the pushing screw (52), and a pushing member is fixedly installed on the end of one side of the pushing screw (52) close to the V-shaped limiting member (53), wherein the pushing member is located inside the pushing hole.

8. The special fixture for machining lever parts according to claim 1, characterized in that: The axial limiting member (6) comprises: A fixing seat (61), wherein the fixing seat (61) is fixed to one side surface of the table top (2) by a second screw; An L-shaped base (62) is fixedly mounted at its transverse end on a side surface of the fixing base (61) away from the lever part (1); a spring (63) having one end fixedly mounted on the vertical surface of the L-shaped base (62); and The V-shaped fixing member (64) is provided on the fixing seat (61) and is fixedly connected to the other end of the spring (63), wherein the V-shaped fixing member (64) can abut against the outer side of the third protrusion (13) under the action of the spring (63).

9. The special fixture for machining lever parts according to claim 8, characterized in that: A hole adapted to the V-shaped fixing member (64) is processed on the surface of the fixing seat (61), and the V-shaped fixing member (64) is located inside the hole.

10. The special fixture for machining lever parts according to claim 1, characterized in that: Both side ends of the table top (2) are machined with connection grooves for fixing the table top (2).

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