A tooling fixture

Abstract

The utility model discloses a tool fixture relates to clamp technical field, aims at solving traditional deceleration box casing processing with the fixture poor flexibility, low commonality, the problem of low change type efficiency. The tool fixture includes screw subassembly and clamping subassembly, and screw subassembly is used for with big board installation bottom plate foundation connection and height adjustment, adjusts height through " bidirectional screw thread " structure, utilizes spring and hexagonal bar cooperation auxiliary assembly, clamping subassembly is used for deceleration box casing positioning and clamping, contains connecting seat, clamp shell, rotating piston rod etc. parts, and connecting seat inner screw rod passes through reverse thread drive two jaw fixing screw subassembly, and clamp shell inner worm -worm wheel -T shape screw rod transmission structure cooperation disc spring, drives rotating piston rod movement, realizes the relaxation of pressing plate 90 degree rotation and axial clamping. The utility model does not need whole replacement fixture to be suitable for different specifications deceleration box casing, and the change type efficiency is high, and clamping is reliable, can satisfy the flexible production demand, reduces equipment and storage cost.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and specifically to a tooling fixture. Background Technology

[0002] In the machining of gearbox housings, tooling fixtures are the core components that ensure machining accuracy and efficiency. Traditional tooling fixtures are mostly designed for a "one-to-one" specific purpose, meaning that one set of fixtures is only suitable for one type of gearbox housing. When it is necessary to switch to machining different models of gearbox housings, the entire fixture must be replaced and readjusted, which not only consumes a lot of time (the debugging cycle usually takes several hours to several days), but also requires the storage of multiple sets of dedicated fixtures, resulting in a significant increase in equipment investment and storage costs.

[0003] As the manufacturing industry shifts towards flexible production with "multiple varieties and small batches," the "rigidity" of traditional dedicated fixtures is becoming increasingly apparent—poor flexibility, low versatility, and low changeover efficiency can no longer meet the rapid response requirements of modern production lines. Therefore, developing a flexible tooling fixture that is quickly adjustable, highly versatile, and provides reliable clamping has become crucial for solving the problem of flexible machining of gearbox housings.

[0004] Therefore, it is of great significance to provide a tooling fixture that can solve the problems existing in the current technology. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a tooling fixture to solve the problem.

[0006] To achieve the above objectives, this utility model provides the following technical solution: including: Screw assembly: The screw assembly is used to achieve the basic connection between the clamp and the mounting base plate of the large plate, including stud head, hexagonal rod, stud sleeve, screw plug, spring, stud rod and stud pin.

[0007] The stud head is connected to the top of the stud rod by a right-hand thread and is fixed by a stud pin, which restricts the relative rotation between the stud head and the stud rod. The stud has an axial cavity inside, and a hexagonal hole adapted to the hexagonal rod is opened at its top. The hexagonal rod is slidably assembled in the hexagonal hole and can move up and down along the axis of the hole. The spring is located inside the cavity of the stud rod, and the bottom of the cavity is sealed by a screw plug. In its natural state, the spring can make the upper surface of the hexagonal rod flush with the upper surface of the stud head. The stud sleeve is connected to the bottom end of the stud rod by a right-hand thread, and the stud sleeve is connected to the mounting plate base plate by a left-hand thread, forming a "two-way thread" transmission structure, which is used to adjust the overall height of the screw assembly.

[0008] Clamping assembly: The clamping assembly is used to position, clamp and fix the gearbox housing and the clamping unit. It includes the clamping housing, rotating piston rod, pressure plate, connecting seat, lead screw, first jaw, second jaw and transmission unit worm gear, worm wheel and T-shaped threaded rod.

[0009] Connecting seat and jaw structure: A lead screw is rotatably installed inside the connecting seat. The surface of the lead screw is provided with two sections of threads with opposite directions, which respectively engage with the first jaw and the second jaw slidably assembled at the bottom of the connecting seat. A connecting nut is installed at the end of the lead screw. Nm of torque can be applied by the HEX sleeve to drive the lead screw to rotate, thereby causing the two jaws to move closer or open in opposite directions. The clamp housing and piston rod assembly: The clamp housing is located above the connecting seat, and its bottom end is provided with four positioning protrusions. The top end of the connecting seat is provided with four positioning grooves. The positioning protrusions and grooves cooperate to ensure the coaxiality of the clamp housing and the connecting seat assembly. The rotating piston rod is slidably engaged with the clamp housing. Its surface is provided with a sliding groove including a spiral rotating groove and a straight clamping groove. The two sections of the sliding groove are connected. The hard pin provided inside the clamp housing is slidably engaged with the sliding groove to restrict the movement trajectory of the rotating piston rod. Clamping transmission unit: The rotating piston rod is equipped with a disc spring inside, and a T-shaped threaded rod is rotatably installed inside the clamp housing. Its top end is in elastic contact with the bottom end of the disc spring, and its bottom end is fixedly connected to the worm gear. A worm is rotatably installed on one side of the clamp housing. The worm meshes with the worm gear for transmission, and its end is equipped with a clamping nut. The worm can be driven to rotate by a torque gun or torque wrench within a torque range of 4-8 Nm. The pressure plate is installed on the top of the rotating piston rod and is used to directly contact and clamp the gearbox housing workpiece.

[0010] Key mating structure: The top of the stud head is provided with an arc-shaped groove, and the opposite side of the first and second jaws is provided with an arc-shaped protrusion that matches the groove. The protrusion and the groove fit together to improve the clamping stability of the jaws on the screw assembly and avoid relative slippage. The spiral rotating groove of the rotating piston rod is used to realize the 10° rotation of the pressure plate when it is relaxed, and the straight clamping groove is used to realize the axial clamping stroke of the pressure plate when it is clamped. When the hard pin slides along the slide groove, the movement state of the piston rod can be precisely controlled.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. High flexibility and versatility: Through the modular design of screw assembly and clamping assembly, the position of clamping assembly on the large plate can be quickly adjusted according to the processing requirements of different specifications of gearbox housing (simply by repeatedly disassembling and assembling screw assembly and connecting seat), without the need to replace the entire set of fixtures, and adaptable to the processing of a variety of workpieces; 2. High clamping reliability: In the clamping assembly, the elastic compression structure of the disc spring can provide continuous and stable clamping force (avoiding workpiece deformation caused by rigid clamping), and the "concave-convex fit" and 15° inclined surface contact between the jaws and the stud head can generate a clamping force of 70KN, ensuring the fixed reliability of the clamping unit and the large plate. 3. Convenient and efficient operation: Each transmission structure is compatible with standardized tools (HEX 5mm hex wrench, torque gun, HEX socket). No complicated adjustments are required for screw assembly height adjustment and clamping / loosening of clamping components. Changeover time can be reduced to 1 / 10 of traditional fixtures. The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0012] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a structural diagram of the clamping component in this utility model; Figure 2 This is a cross-sectional view of the clamping component in this utility model; Figure 3 This is a cross-sectional view of the screw assembly in this utility model; Figure 4 This is a structural diagram of the connection between the clamping component and the screw component in this utility model.

[0015] In the diagram: 1. Stud head; 2. Hexagonal rod; 3. Stud sleeve; 4. Screw plug; 5. Spring; 6. Stud rod; 7. Stud pin; 8. Pressure plate; 9. Rotating piston rod; 10. Clamp housing; 11. Clamping nut; 12. Connecting nut; 13. Worm gear; 14. Connecting seat; 15. Worm wheel; 16. T-shaped threaded rod; 17. Disc spring; 18. Hard pin; 19. First jaw; 20. Second jaw; 21. Lead screw. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0017] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0018] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0019] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0020] Please see Figure 1-4 This utility model provides a technical solution for a tooling fixture: The specific structure is as follows: Screw assembly: The screw assembly is used to realize the basic connection between the clamp and the mounting base plate of the large plate, including stud head 1, hexagonal rod 2, stud sleeve 3, screw plug 4, spring 5, stud rod 6 and stud pin 7.

[0021] The stud head 1 is connected to the top of the stud rod 6 by a right-hand thread and is fixed by the stud pin 7, which restricts the relative rotation between the stud head 1 and the stud rod 6; The stud rod 6 has an axial cavity inside, and a hexagonal hole adapted to the hexagonal rod 2 is opened at its top. The hexagonal rod 2 is slidably assembled in the hexagonal hole and can move up and down along the axis of the hole. Spring 5 is located inside the cavity of stud rod 6. The bottom of the cavity is sealed by screw plug 4. In its natural state, spring 5 can make the upper surface of hexagonal rod 2 flush with the upper surface of stud head 1. The stud sleeve 3 is connected to the bottom end of the stud rod 6 by a right-hand thread, and the stud sleeve 3 is connected to the mounting plate base plate by a left-hand thread, forming a "two-way thread" transmission structure, which is used to adjust the overall height of the screw assembly.

[0022] Clamping assembly; The clamping assembly is used to position, clamp and fix the gearbox housing and the clamping unit, including clamp housing 10, rotating piston rod 9, pressure plate 8, connecting seat 14, lead screw 21, first jaw 19, second jaw 20 and transmission unit worm gear 13, worm wheel 15 and T-shaped threaded rod 16.

[0023] Connecting seat and jaw structure: A lead screw 21 is rotatably mounted inside the connecting seat 14. The surface of the lead screw 21 is provided with two sections of threads with opposite directions, which respectively mesh with the first jaw 19 and the second jaw 20 slidably assembled at the bottom end of the connecting seat 14. A connecting nut 12 is installed at the end of the lead screw 21. A torque of 150 Nm can be applied by the HEX sleeve to the connecting nut 12 to drive the lead screw 21 to rotate, thereby causing the two jaws to move in opposite directions to move closer together or open apart. Assembly of the clamp housing and piston rod: The clamp housing 10 is located above the connecting seat 14, and its bottom end is provided with four positioning protrusions. The top end of the connecting seat 14 is provided with four positioning grooves. The positioning protrusions and grooves cooperate to ensure the coaxiality of the clamp housing 10 and the connecting seat 14. The rotating piston rod 9 is slidably engaged with the clamp housing 10. Its surface is provided with a sliding groove including a spiral rotating groove and a straight clamping groove. The two sliding grooves are connected. The hard pin 18 provided inside the clamp housing 10 is slidably engaged with the sliding groove to restrict the movement trajectory of the rotating piston rod 9. Clamping transmission unit: A disc spring 17 is provided inside the rotating piston rod 9, and a T-shaped threaded rod 16 is rotatably installed inside the clamp housing 10. Its top end is in elastic contact with the bottom end of the disc spring 17, and its bottom end is fixedly connected to the worm gear 15. A worm 13 is rotatably installed on one side of the clamp housing 10. The worm 13 meshes with the worm gear 15 for transmission, and a clamping nut 11 is provided at its end. The worm 13 can be driven to rotate by a torque gun or torque wrench within a torque range of 4-8 Nm. The pressure plate 8 is installed at the top of the rotating piston rod 9 and is used to directly contact and clamp the gearbox housing workpiece.

[0024] Key mating structure: The top of the stud head 1 is provided with an arc-shaped groove, and the opposite side of the first jaw 19 and the second jaw 20 is provided with an arc-shaped protrusion that matches the groove. The protrusion and the groove fit together to improve the clamping stability of the jaws on the screw assembly and avoid relative slippage. The spiral rotating groove of the rotating piston rod 9 is used to realize the 90° rotation of the pressure plate 8 when it is relaxed, and the straight clamping groove is used to realize the axial clamping stroke of the pressure plate 8 when it is clamped. When the hard pin 18 slides along the slide groove, it can precisely control the movement state of the piston rod.

[0025] Working principle: Step 1: Pre-installation of screw assembly Screw the stud sleeve 3 into the preset mounting hole of the large plate through the left-hand thread, ensuring that the top of the stud sleeve 3 is flush with the surface of the large plate; Place the spring 5 into the cavity of the stud rod 6, and seal the bottom of the cavity with the screw plug 4; Connect the stud rod 6 to the stud sleeve 3 via a right-hand thread, then screw the stud head 1 into the top of the stud rod 6 via a right-hand thread, and insert the stud pin 7 to fix it. Insert the hexagonal rod 2 into the hexagonal hole at the top of the stud rod 6, and the spring 5 will naturally extend so that the upper surface of the hexagonal rod 2 is flush with the upper surface of the stud head 1.

[0026] Step 2: Connecting the clamping assembly and the screw assembly Place the connector 14 above the screw assembly, so that the first jaw 19 and the second jaw 20 are located on both sides of the stud head 1; The sleeve is used to cover the connecting nut 12, and a torque of 150 Nm is applied by the torque gun to drive the lead screw 21 to rotate; the reverse thread of the lead screw 21 drives the two jaws to move closer to the middle, and the arc-shaped protrusion of the jaws fits with the arc-shaped groove of the stud head 1. As the lead screw 21 is continuously rotated, the jaws contact and press against the 15° inclined surface of the stud head 1, generating an upward pulling force on the screw assembly and a downward clamping force on the connecting seat 14, until the connecting seat 14 is completely pressed against the surface of the large plate with a clamping force of 70KN, thus completing the fixation of the clamping assembly.

[0027] Step 3: Clamping the gearbox housing Place the gearbox housing workpiece in the preset position so that the bottom surface of the workpiece fits against the positioning surface of the connecting seat 14; Use a torque wrench set to the 4-8 Nm range to tighten the clamping nut 11, which drives the worm gear 13 to rotate. The worm gear 13 drives the worm wheel 15 and the T-shaped threaded rod 16 to rotate counterclockwise. The T-shaped threaded rod 16 moves downward, compressing the disc spring 17 and pushing the rotating piston rod 9 downward, causing the pressure plate 8 to move downward as well; at this time, the hard pin 18 slides along the straight clamping groove of the rotating piston rod 9, restricting the rotation of the piston rod. When the pressure head of the pressure plate 8 contacts the workpiece surface, the rotating piston rod 9 stops moving axially, and the T-shaped threaded rod 16 continues to compress the disc spring 17 downwards; the elastic force of the disc spring 17 is transmitted to the pressure plate 8 through the piston rod, applying a continuous clamping force to the workpiece and completing the workpiece fixing.

[0028] Step 4: Workpiece machining and fixture adjustment After detecting the actual position of the workpiece with a probe and compensating for the machining coordinates, the machining equipment is started to machine the gearbox housing. When it is necessary to switch between machining different specifications of gearbox housings: Tighten the clamping nut 11 clockwise, the T-shaped threaded rod 16 moves upward, the disc spring 17 rebounds, the hard pin 18 slides along the spiral rotating groove, driving the rotating piston rod 9 and the pressure plate 8 to rotate 90° and rise, releasing the workpiece; Turn the connecting nut 12 counterclockwise, and the screw 21 will cause the jaws to open, thus removing the clamping assembly.

[0029] The above description is merely a preferred embodiment of this utility model and does not limit the scope of protection of this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations made to these embodiments within the spirit and principles of this utility model, through conventional substitutions or methods that achieve the same function without departing from the principles and spirit of this utility model, fall within the scope of protection of this utility model.

Claims

1. A tooling fixture, characterized in that, Includes screw assemblies and clamping assemblies; The screw assembly includes a stud head (1), a hexagonal rod (2), a stud sleeve (3), a screw plug (4), a spring (5), a stud rod (6), and a stud pin (7); The stud head (1) is threaded to the top of the stud rod (6) and fixed by the stud pin (7); the stud rod (6) has a cavity inside and a hexagonal hole at its top, and the hexagonal rod (2) is slidably fitted into the hexagonal hole; the spring (5) is located inside the cavity, and the bottom of the cavity is sealed by a screw plug (4); the stud sleeve (3) is threaded to the bottom of the stud rod (6); The clamping assembly includes a clamp housing (10), a rotating piston rod (9), a pressure plate (8), and a connecting seat (14); the clamp housing (10) is disposed above the connecting seat (14); the pressure plate (8) is installed on the top of the rotating piston rod (9); the rotating piston rod (9) is slidably engaged with the clamp housing (10), and a groove is provided on its surface; a hard pin (18) is provided inside the clamp housing (10), and the hard pin (18) is slidably engaged with the groove; a disc spring (17) is provided inside the rotating piston rod (9); a T-shaped threaded rod (16) is rotatably installed inside the clamp housing (10), the top of the T-shaped threaded rod (16) is elastically in contact with the bottom of the disc spring (17), and its bottom end is engaged with the worm gear (15); a worm (13) is rotatably installed on one side of the clamp housing (10), and the worm (13) meshes with the worm gear (15) for transmission, and a clamping nut (11) is provided at its end; The connecting seat (14) has a lead screw (21) rotatably mounted inside, and a first jaw (19) and a second jaw (20) are slidably mounted on its bottom end; the surface of the lead screw (21) is provided with two sections of threads with opposite directions, which mesh with the first jaw (19) and the second jaw (20) respectively for transmission; a connecting nut (12) is installed at the end of the lead screw (21).

2. The tooling fixture according to claim 1, characterized in that: The top of the stud head (1) is provided with a groove, and the opposite side of the first jaw (19) and the second jaw (20) is provided with a protrusion that matches the groove.

3. The tooling fixture according to claim 1, characterized in that: The groove on the surface of the rotating piston rod (9) includes two connected sections, one of which is a spiral rotating groove and the other is a straight clamping groove.

4. A tooling fixture according to claim 1, characterized in that: The bottom of the fixture housing (10) is provided with four positioning protrusions, and the top of the connecting seat (14) is provided with four positioning grooves. The positioning protrusions and positioning grooves cooperate with each other.

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