A clamping fixture for machining a gearbox housing

Abstract

A clamping fixture for machining a gearbox housing, relating to the field of clamping fixture technology, includes a base. A support plate is vertically and elevatingly mounted on the top of the base. Several positioning rods are fixedly mounted on the top of the support plate. Two movable frames and two sliding frames are slidably mounted on the top of the base. A clamping plate is rotatably mounted at the end of each movable frame. Several positioning posts are fixedly mounted at the end of each clamping plate. A circular support is mounted at the end of each sliding frame, and the circular support is fixedly connected to the sliding frame via a connecting shaft. Several sliding plates are evenly distributed circumferentially at the end of the circular support. A U-shaped frame is fixedly mounted on the outer wall of each sliding plate, and a support roller is rotatably mounted on the inner wall of the U-shaped frame. A rotating sleeve is rotatably fitted onto the outer wall of one of the connecting shafts. A fixed plate is fixedly mounted on the outer wall of the rotating sleeve, and an adjusting post is fixedly connected to the end of the fixed plate. This invention solves the problem of poor machining continuity caused by the need for multiple disassemblies during the complete machining of the six end faces of a gearbox housing in existing gearbox housing clamping fixtures.

Description

Technical Field

[0001] This invention relates to the field of clamping tooling technology, specifically to a clamping tooling for machining a gearbox housing. Background Technology

[0002] The gearbox housing is a core component of an automotive transmission system. Essentially a high-precision, rigid load-bearing enclosure, it primarily houses and protects all internal transmission components, including gears, shafts, bearings, and shifting mechanisms, ensuring precise alignment and stable operation. Its external structure also plays a crucial role in securing the entire gearbox assembly to the vehicle chassis. Specifically, the six end faces of the gearbox housing are designed as mounting surfaces for connecting the engine, clutch, drive shaft, or other auxiliary devices. These mounting surfaces typically have locating holes and mounting holes to ensure accurate alignment and secure connection with other components.

[0003] During the manufacturing process, to ensure overall sealing and assembly accuracy, these mounting contact surfaces must be machined to achieve the required flatness, thus facilitating reliable subsequent installation and sealing. Clamping fixtures are used during machining to securely position and hold the surfaces, ensuring correct posture and stability throughout each process, ultimately producing a finished product that meets stringent technical standards.

[0004] The existing gearbox housing clamping fixtures have gradually revealed their shortcomings during use, mainly in the following aspects:

[0005] The six end faces of the gearbox housing have different mounting planes and positioning hole systems depending on the function of the components they connect to. Therefore, the geometric features of the six end faces are all different. To accommodate this multi-faceted machining requirement, existing clamping fixtures typically have dedicated clamping modules for each of the six end faces on the fixture base. During machining, the operator must select the corresponding clamping piece to clamp the housing according to the specific end face to be machined. After machining each end face, and when it is necessary to switch to another end face, the housing must be removed from the fixture, its orientation readjusted, and then it must be clamped again using another set of corresponding clamping pieces. This clamping method requires multiple disassembly and reassembly steps to complete the machining of the gearbox housing, resulting in poor machining continuity.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a clamping fixture for machining a gearbox housing. This clamping fixture enables continuous machining of six end faces of the gearbox housing in a single clamping, completely eliminating the time waste caused by repeated disassembly and assembly of workpieces, and significantly improving the continuity of the machining process.

[0008] To address the above problems, the present invention provides the following technical solution:

[0009] A clamping fixture for machining a gearbox housing includes a base. A support plate is vertically and vertically mounted on the top of the base. Several positioning rods are fixedly mounted on the top of the support plate. Two movable frames and two sliding frames are slidably mounted on the top of the base. A clamping plate is rotatably mounted at the end of the movable frame. Several positioning posts are fixedly mounted at the end of the clamping plate. A circular support is mounted at the end of the sliding frame. The circular support is fixedly connected to the sliding frame via a connecting shaft. Several sliding plates are evenly distributed circumferentially at the end of the circular support. A U-shaped frame is fixedly mounted on the outer wall of the sliding plate. A support roller is rotatably mounted on the inner wall of the U-shaped frame. A rotating sleeve is rotatably mounted on the outer wall of one of the connecting shafts. A fixed plate is fixedly mounted on the outer wall of the rotating sleeve. An adjusting post is fixedly connected to the end of the fixed plate.

[0010] As an optimized solution, a driving block is slidably provided at the end of the circular support, a driving wedge slider is fixedly provided on the side wall of the driving block, a driven wedge slider is fixedly provided on the inner wall of the sliding plate, and the inclined end of the driving wedge slider and the inclined end of the driven wedge slider are slidably connected.

[0011] As an optimized solution, the connecting shaft has a built-in groove inside, and a built-in telescopic cylinder is fixedly installed inside the built-in groove. The telescopic end of the built-in telescopic cylinder passes through the circular support and is fixedly connected to the drive block.

[0012] As an optimized solution, the circular support is fixedly provided with several limiting posts at its end, and the limiting posts pass through the driving block and are slidably connected to the driving block.

[0013] As an optimized solution, one of the sliding frames is fixedly equipped with an adjusting motor at its end. The output shaft of the adjusting motor passes through the sliding frame and is fixedly fitted with a drive gear. The outer wall of the rotating sleeve is fixedly fitted with a driven gear that meshes with the drive gear.

[0014] As an optimized solution, the insertion ends of the positioning rod, positioning post, and adjusting post are all chamfered. The positioning posts on the two clamping plates are arranged in accordance with the arrangement of the mounting holes at both ends of the gearbox housing. The distribution of the positioning rod is consistent with the arrangement of several mounting holes on one side wall of the gearbox housing.

[0015] As an optimized solution, a number of lifting and telescopic cylinders are fixedly provided at the bottom of the base, and the telescopic ends of the lifting and telescopic cylinders pass through the base and are fixedly connected to the support plate.

[0016] As an optimized solution, a number of drive telescopic cylinders and electrically controlled telescopic cylinders are fixedly provided on the top of the base. The telescopic ends of the drive telescopic cylinders are fixedly connected to the moving frame, and the telescopic ends of the electrically controlled telescopic cylinders are fixedly connected to the sliding frame.

[0017] As an optimized solution, a servo motor is fixedly provided at the end of the moving frame, and the output shaft of the servo motor passes through the moving frame and is fixedly connected to the clamping plate.

[0018] As an optimized solution, the bottom of the base is fixedly provided with several positioning feet.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. When clamping the gearbox housing, the support plate rises to a preset height, and then the gearbox housing is hoisted onto the top of the support plate, so that its C-end face contacts the support plate. A positioning rod is then inserted into the corresponding mounting hole on the C-end face, thus completing the initial positioning of the gearbox housing (e.g., ...). Figure 9 (As shown); then the two moving frames slide towards each other, causing the positioning pins on the two clamping plates to insert into the corresponding mounting holes on the E and F ends of the gearbox housing, thereby clamping the gearbox housing (as shown). Figure 10 As shown); the support plate is reset, and the processing equipment processes the mounting contact surface on end face A of the gearbox housing; after end face A is processed, the servo motor drives the clamping plate to change the gearbox housing surface, and then processes the mounting contact surface on end face B; and so on. When processing end face D, the two sliding frames slide towards each other, so that the support rollers on the two circular supports enter the mounting holes on end face A and end face C of the gearbox housing respectively, and the adjusting column is inserted into one mounting hole on end face C; then the drive block slides towards the circular support, pushing the support rollers to move outward until the support rollers are in close contact with the inner wall of the mounting holes on end face A / C of the gearbox housing. At this time, several support rollers and the adjusting column together form an effective support for the gearbox housing; after end face D is processed, the moving frame is reset, the positioning column is disengaged from the gearbox housing to avoid it, and with the cooperation of the support rollers, the adjusting motor drives the adjusting column to rotate, thereby driving the gearbox housing to rotate, so as to process the mounting contact surfaces on end face E and end face F of the gearbox housing (e.g. Figure 11 (As shown); At this point, all six end faces of the gearbox housing have been machined. This clamping fixture enables continuous machining of all six end faces of the gearbox housing in a single clamping operation, completely eliminating the time wastage caused by repeated disassembly and assembly of workpieces and significantly improving the continuity of the machining process.

[0021] 2. The positioning feet allow the clamping fixture to be installed on the machining table. The insertion ends of the positioning rod, positioning column, and adjusting column are all chamfered to effectively guide them to be smoothly inserted into the corresponding mounting holes of the gearbox housing. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the 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.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the support plate and clamping plate of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the end of the sliding frame of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the end of the circular support of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure between the sliding frame and the circular support of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the connecting shaft of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of one end of the gearbox housing of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the other end of the gearbox housing of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the gearbox housing of the present invention when it has completed its initial positioning;

[0032] Figure 10 This is a schematic diagram of the structure of the gearbox housing of the present invention when it is clamped.

[0033] Figure 11 This is a schematic diagram of the structure of the gearbox housing E / F end face during machining according to the present invention;

[0034] Figure 12 This is a schematic diagram of the structure when the gearbox housing of the present invention is in contact with the support roller.

[0035] In the diagram: 1-Base; 2-Moving frame; 3-Positioning column; 4-Clamping plate; 5-Sliding frame; 6-Positioning support foot; 7-Support plate; 8-Servo motor; 9-Drive telescopic cylinder; 10-Lifting telescopic cylinder; 11-Positioning rod; 12-Electrically controlled telescopic cylinder; 13-Connecting shaft; 14-Circular support; 15-Driven wedge slider; 16-Sliding plate; 17-Support roller; 18-U-shaped frame; 19-Driven wedge slider; 20-Drive block; 21-Limiting column; 22-Built-in groove; 23-Built-in telescopic cylinder; 24-Rotating sleeve; 25-Adjusting column; 26-Fixing plate; 27-Adjusting motor; 28-Drive gear; 29-Driven gear; 30-Gearbox housing. Detailed Implementation

[0036] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0037] like Figures 1 to 12 As shown, a clamping fixture for processing a gearbox housing includes a base 1. A support plate 7 is vertically raised and lowered on the top of the base 1. Several positioning rods 11 are fixedly mounted on the top of the support plate 7. Two movable frames 2 and two sliding frames 5 are slidably mounted on the top of the base 1. A clamping plate 4 is rotatably mounted at the end of the movable frame 2. Several positioning posts 3 are fixedly mounted at the end of the clamping plate 4. A circular support 14 is mounted at the end of the sliding frame 5. The circular support 14 is fixedly connected to the sliding frame 5 through a connecting shaft 13. Several sliding plates 16 are evenly distributed circumferentially at the end of the circular support 14. A U-shaped frame 18 is fixedly mounted on the outer wall of the sliding plate 16. A support roller 17 is rotatably mounted on the inner wall of the U-shaped frame 18. A rotating sleeve 24 is rotatably mounted on the outer wall of one of the connecting shafts 13. A fixing plate 26 is fixedly mounted on the outer wall of the rotating sleeve 24. An adjusting post 25 is fixedly connected to the end of the fixing plate 26.

[0038] A drive block 20 is slidably provided at the end of the circular support 14. A drive wedge slider 19 is fixedly provided on the side wall of the drive block 20. A driven wedge slider 15 is fixedly provided on the inner wall of the sliding plate 16. The inclined end of the drive wedge slider 19 and the inclined end of the driven wedge slider 15 are slidably connected.

[0039] The connecting shaft 13 has an internal groove 22, and an internal telescopic cylinder 23 is fixedly installed inside the internal groove 22. The telescopic end of the internal telescopic cylinder 23 passes through the circular support 14 and is fixedly connected to the drive block 20.

[0040] A number of limiting posts 21 are fixedly provided at the end of the circular support 14. The limiting posts 21 pass through the driving block 20 and are slidably connected to the driving block 20.

[0041] One of the sliding frames 5 has an adjustment motor 27 fixedly installed at one end. The output shaft of the adjustment motor 27 passes through the sliding frame 5 and is fixedly fitted with a drive gear 28. The outer wall of the rotating sleeve 24 is fixedly fitted with a driven gear 29 that meshes with the drive gear 28.

[0042] The insertion ends of the positioning rod 11, positioning post 3 and adjusting post 25 are all chamfered. The positioning posts 3 on the two clamping plates 4 are arranged in accordance with the arrangement of the mounting holes at both ends of the gearbox housing 30. The distribution of the positioning rod 11 is consistent with the arrangement of several mounting holes on one side wall of the gearbox housing 30.

[0043] Several lifting and telescopic cylinders 10 are fixedly installed at the bottom of the base 1. The telescopic ends of the lifting and telescopic cylinders 10 pass through the base 1 and are fixedly connected to the support plate 7.

[0044] Several drive telescopic cylinders 9 and electrically controlled telescopic cylinders 12 are fixedly installed on the top of the base 1. The telescopic end of the drive telescopic cylinder 9 is fixedly connected to the moving frame 2, and the telescopic end of the electrically controlled telescopic cylinder 12 is fixedly connected to the sliding frame 5.

[0045] A servo motor 8 is fixedly installed at the end of the movable frame 2. The output shaft of the servo motor 8 passes through the movable frame 2 and is fixedly connected to the clamping plate 4.

[0046] The bottom of the base 1 is fixed with several positioning feet 6.

[0047] The six end faces of the gearbox housing 30 are AF.

[0048] The working principle of this device is as follows:

[0049] When clamping the gearbox housing 30, the support plate 7 rises to a preset height, and then the gearbox housing 30 is hoisted onto the top of the support plate 7, so that its C-end face contacts the support plate 7. The positioning rod 11 is then inserted into the corresponding mounting hole on the C-end face, thus completing the initial positioning of the gearbox housing 30 (e.g., ...). Figure 9 (As shown); then the two moving frames 2 slide towards each other, causing the positioning pins 3 on the two clamping plates 4 to be inserted into the corresponding mounting holes on the E and F end faces of the gearbox housing 30, thereby clamping the gearbox housing 30 (as shown). Figure 10(As shown); support plate 7 is reset, and the processing equipment processes the mounting contact surface on end face A of gearbox housing 30; after end face A is processed, servo motor 8 drives clamping plate 4 to change the face of gearbox housing 30, and then processes the mounting contact surface on end face B; and so on. When processing end face D, the two sliding frames 5 slide towards each other, so that the support rollers 17 on the two circular supports 14 enter the mounting holes on end face A and end face C of gearbox housing 30 respectively, and at the same time, the adjusting column 25 is inserted into one mounting hole on end face C; then the drive block 20 moves closer to the circular support. Sliding in the direction of 14 pushes the support roller 17 outward until the support roller 17 is in close contact with the inner wall of the mounting hole on the A / C end face of the gearbox housing 30. At this time, several support rollers 17 and the adjusting column 25 together form an effective support for the gearbox housing 30. After the D end face is processed, the moving frame 2 is reset, and the positioning column 3 is disengaged from the gearbox housing 30 to avoid it. With the cooperation of the support roller 17, the adjusting motor 27 drives the adjusting column 25 to rotate, thereby driving the gearbox housing 30 to rotate, so as to process the mounting contact surfaces of the E end face and the F end face of the gearbox housing 30 (such as...). Figure 11 (As shown); At this point, all the mounting contact surfaces of the six end faces of the gearbox housing 30 have been machined. This clamping fixture enables the continuous machining of the six end faces of the gearbox housing 30 in a single clamping, completely eliminating the time waste caused by repeated disassembly and assembly of workpieces and significantly improving the continuity of the machining process.

[0050] The positioning feet 6 allow the clamping fixture to be installed on the machining table. The insertion ends of the positioning rod 11, positioning column 3 and adjusting column 25 are all chamfered to effectively guide them to be smoothly inserted into the corresponding mounting holes of the gearbox housing 30.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A clamping jig for machining a transmission case, characterized by: The utility model provides a kind of movable frame, including base (1), the base (1) top vertical lifting is equipped with support plate (7), the support plate (7) top is fixedly provided with several positioning insertion rod (11), the base (1) top is slidably equipped with two moving frame (2) and two sliding frame (5), the moving frame (2) end is rotatably equipped with clamping plate (4), the clamping plate (4) end is fixedly provided with several positioning column (3), the sliding frame (5) end is equipped with circular support (14), the circular support (14) is fixedly connected with sliding frame (5) by connecting shaft (13), the circular support (14) end is uniformly distributed with several slidingly arranged sliding plate (16) along circumference, the sliding plate (16) outer wall is fixedly provided with U-shaped frame (18), the U-shaped frame (18) inner wall is rotatably equipped with support roller (17), one of the connecting shaft (13) outer wall rotatably sleeved with rotating sleeve (24), the rotating sleeve (24) outer wall is fixedly provided with fixed plate (26), the fixed plate (26) end is fixedly connected with adjusting column (25); The circular support (14) end is slidably equipped with driving block (20), the driving block (20) side wall is fixedly provided with driving wedge-shaped slide (19), the sliding plate (16) inner wall is fixedly provided with driven wedge-shaped slide (15), the driving wedge-shaped slide (19) inclined plane end and driven wedge-shaped slide (15) inclined plane end are slidably connected; The connecting shaft (13) is provided with built-in groove (22) inside, the built-in groove (22) is fixedly provided with built-in telescopic cylinder (23) inside, the built-in telescopic cylinder (23) telescopic end passes through circular support (14) and is fixedly connected with driving block (20); One of the sliding frame (5) end is fixedly provided with adjusting motor (27), the adjusting motor (27) output shaft passes through sliding frame (5) and is fixedly sleeved with driving gear (28), the rotating sleeve (24) outer wall is fixedly sleeved with driven gear (29) engaged with driving gear (28); The base (1) bottom is fixedly provided with several lifting telescopic cylinders (10), the lifting telescopic cylinder (10) telescopic end passes through base (1) and is fixedly connected with support plate (7); The base (1) top is fixedly provided with several driving telescopic cylinders (9) and electric control telescopic cylinders (12), the driving telescopic cylinder (9) telescopic end is fixedly connected with moving frame (2), the electric control telescopic cylinder (12) telescopic end is fixedly connected with sliding frame (5); The moving frame (2) end is fixedly provided with servo motor (8), the servo motor (8) output shaft passes through moving frame (2) and is fixedly connected with clamping plate (4).

2. The clamping tool for machining a gearbox housing according to claim 1, characterized in that: The circular support (14) end is fixedly provided with several limit posts (21), the limit post (21) penetrates driving block (20) and is slidably connected with driving block (20).

3. The clamping tool for machining a gearbox housing according to claim 1, characterized in that: The insertion ends of the positioning inserting rods (11), the positioning columns (3) and the adjusting columns (25) are all chamfered, the positioning columns (3) on the two clamping plates (4) are correspondingly arranged according to the arrangement mode of the mounting holes at the two ends of the gearbox shell (30), and the distribution mode of the positioning inserting rods (11) is consistent with the arrangement mode of the mounting holes on one side wall of the gearbox shell (30).

4. The clamping tool for machining a gearbox housing according to claim 1, characterized in that: The base (1) is fixedly provided with a plurality of positioning feet (6) at the bottom.

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