Clamp for new energy motor shell

Abstract

The utility model relates to a clamp for a new energy motor shell, and aims to solve the problem that the coaxiality of the new energy motor shell is affected due to the fact that the new energy motor shell needs to be machined through secondary clamping in the prior art. The utility model provides a clamp for a new energy motor shell. The clamp comprises a clamp base with a through hole in the center, a limiting plate, a guide plate, a positioning clamping claw, a machine tool pull rod and a taper pin. The guide plate is fixed to the clamp base and structurally forms a guide groove, and the machine tool pull rod and the taper pin are fixedly connected and slidably arranged along the central axis of a central through hole of the clamp base in a penetrating mode. The positioning and clamping claw is arranged on the clamp base and placed in the guide groove of the guide plate, and a spring is fixed on the positioning and clamping claw.

Description

Technical Field

[0001] This utility model relates to a clamp, specifically a clamp for a new energy motor housing. Background Technology

[0002] The motor housing, which is paired with the new energy vehicle transmission housing, features a large and deep bore structure. Both ends of the motor housing are designed with inner and outer stops and sealing grooves to achieve a sealing function during assembly and a precise fit with the transmission housing. Therefore, this component requires high coaxiality of the inner and outer stops and sealing grooves to ensure assembly accuracy and good sealing performance.

[0003] In the conventional machining process of motor housing, due to the limitations of the machine tool fixture itself, it is necessary to reverse the top and bottom of the motor housing for machining, that is, to perform machining in two clamping operations. However, for new energy motor housings with large and deep hole structures, this machining method is prone to positioning and alignment errors, which in turn affect the coaxiality of the new energy motor housing.

[0004] Chinese invention patent application publication number CN207521728U discloses a die-cast aluminum alloy motor housing processing fixture, including a chuck, a mounting plate connected to the chuck by multiple support seats, multiple auxiliary limit cylinders evenly spaced around the circumference of the mounting plate, the auxiliary limit cylinders being controlled by solenoid valves, the auxiliary limit cylinders being connected to the mounting plate through cylinder mounting seats, and three clamping claws evenly spaced around the circumference of the chuck body.

[0005] Chinese invention patent application CN221495090U discloses a fast synchronous force clamping fixture, which includes a mounting platform and a first worktable mounted on it. A workpiece support block with its top surface lower than the upper surface of the first worktable is provided around the outer edge of the first worktable. The first and second worktables are coaxially arranged vertically, and multiple anti-collision blocks are evenly distributed on the outer edges of both. The clamping mechanism includes a transmission rod bracket and a transmission rod mounted on the transmission rod bracket and a spring baffle. One end of the transmission rod is threaded and forms a screw-nut mechanism with an adjusting nut. The other end of the transmission rod is hinged to a sliding groove on the outer side of a rotating crank arm. The lower end of the lifting rod is hinged to a sliding groove on the inner side of the rotating crank arm. The lifting rod located in the central through hole of the second worktable is connected to a clamping rod that can rotate around the clamping rod bracket through a claw connector. An alignment mechanism is used to limit the axial rotation of the motor housing.

[0006] However, the fixtures disclosed in the two patent documents still require secondary clamping during processing in order to complete the processing of the upper and lower ends of the motor housing. If applied to the processing of new energy motor housings, they are prone to introducing positioning and alignment errors, resulting in technical problems that make it impossible to guarantee the coaxiality requirements. Utility Model Content

[0007] The purpose of this utility model is to solve the technical problem that when existing fixtures are used to process the housing of new energy motors, they need to be clamped twice to complete the processing of the upper and lower end structures. This method is prone to introducing positioning errors and alignment errors, resulting in the inability to guarantee the coaxiality requirements. Therefore, this utility model provides a fixture for the housing of new energy motors.

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0009] A clamp for the housing of a new energy motor, characterized by:

[0010] Includes a clamp base with a through hole in the center and a positioning and clamping mechanism;

[0011] The positioning and clamping mechanism includes a limiting plate, a guide plate, positioning and clamping claws, a machine tool tie rod, and a tapered pin;

[0012] The guide plate is fixed on the fixture base, with a through hole in its center and a guide groove radially arranged outside the through hole;

[0013] The tapered pin has a stepped structure, with a cylindrical lower part and a frustum-shaped upper part. The small end of the frustum-shaped part faces downward, and the outer diameter of the lower cylindrical part is smaller than the outer diameter of the small end of the frustum-shaped part. The lower cylindrical part is located in the through hole of the guide plate and slides with the guide plate. The lower end of the tapered pin is connected to the upper end of the machine tool tie rod to provide tension for the tapered pin.

[0014] The positioning clamping claw is disposed in the guide groove on the guide plate, and the inner end of its head is a conical surface adapted to the frustum shape and abuts against the outer surface of the frustum.

[0015] A limiting plate is provided on the guide plate, and the frustum-shaped structure of the tapered pin is set in the through hole of the limiting plate. A spring is provided between the head of the clamping claw and the inner sidewall of the through hole of the limiting plate.

[0016] Furthermore, a guide cover is installed on the upper part of the limiting plate, and a guide hole is provided at the center of the inner side of the guide cover;

[0017] The tapered pin has a guide post on its frustoconical upper part. The guide post is located in the guide hole of the guide cover plate and is used to guide the tapered pin.

[0018] Furthermore, a limiting groove is provided on the limiting plate, and the limiting groove is radially arranged along the outer side of the through hole on the limiting plate;

[0019] The head of the clamping claw is provided with an upward protrusion, which is located in the limiting groove. One end of the spring is connected to the outside of the protrusion, and the other end abuts against the bottom of the limiting groove.

[0020] Furthermore, the outer end of the positioning clamping claw head is provided with a screw hole, on which a guide post is connected, and the spring is fitted on the guide post to guide the spring.

[0021] Furthermore, the inner end of the positioning clamping claw head is provided with a groove for applying lubricant.

[0022] Furthermore, the tail of the positioning clamping claw is an arc-shaped structure extending to both sides, and the shape of its outer wall is adapted to the shape of the inner wall of the motor housing to be clamped.

[0023] Furthermore, the lower part of the outer side wall of the positioning clamping claw has an inward groove, and an outer support ring is installed on the outer side of the positioning clamping claw. The inner wall of the groove is used to cooperate with the inner wall of the outer support ring so that the outer support ring can accurately position the tail of the positioning clamping claw.

[0024] Furthermore, the upper part of the tapered pin is provided with a through hole, and a screw is installed in the through hole. The upper end of the machine tool tie rod is connected to the lower end of the tapered pin by the screw.

[0025] Furthermore, the upper part of the guide plate is provided with a circular boss coaxial with the through hole, and the bottom of the limiting plate is provided with a circular groove adapted to the circular boss. The circular boss is embedded in the circular groove for the cooperation and positioning between the guide plate and the limiting plate.

[0026] Furthermore, the bottom of the fixture base is equipped with machine tool connecting bolts, and a groove is provided in the central area of ​​its bottom for connecting with the machine tool. The outer sides of the guide plate and the limiting plate are provided with corresponding clearance grooves, and the machine tool connecting bolts are installed in the clearance grooves. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of a clamp for a new energy motor housing according to the present invention;

[0028] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of a clamp for a new energy motor housing according to the present invention;

[0029] Figure 3 This is a schematic diagram of the positioning clamping claw and guide plate combination structure in an embodiment of a clamp for a new energy motor housing according to the present invention;

[0030] Figure 4 This is a schematic diagram of the positioning clamping claw structure in an embodiment of a clamp for a new energy motor housing according to the present invention;

[0031] Figure 5 This is a schematic diagram of the guide plate structure in an embodiment of a clamp for a new energy motor housing according to the present invention;

[0032] Figure 6 This is a schematic diagram of the limiting plate structure in an embodiment of a clamp for a new energy motor housing according to the present invention;

[0033] Explanation of reference numerals in the attached drawings: 1-Outer support ring, 2-Clamping base, 3-Limiting plate, 4-Positioning clamping claw, 5-Spring, 6-Guide plate, 7-Machine tool connecting bolt, 8-Machine tool tie rod, 9-Screw, 10-Tapered pin, 11-Guide cover plate. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 and Figure 2 As shown, a fixture for a new energy motor housing includes an outer support ring 1, a fixture base 2, a limiting plate 3, a positioning clamping claw 4, a spring 5, a guide plate 6, a machine tool connecting bolt 7, a machine tool tie rod 8, a screw 9, a tapered pin 10, and a guide cover plate 11. The overall structure and height design of this fixture allow for precise positioning and clamping of the upper and lower ends of the motor housing with only one clamping operation during the machining of the motor housing. This enables simultaneous machining of both the upper and lower ends, avoiding positioning deviations and alignment errors caused by secondary clamping and flipping to machine the two ends of the motor housing separately. This ensures the coaxial accuracy of the motor housing. At the same time, the fixture supports the motor housing from the inside, avoiding interference with the machining of the external machining area of ​​the motor housing.

[0036] like Figure 1 and Figure 2 As shown, the fixture base 2 serves as the support and connection foundation for all components of the fixture. It is in the shape of a thick disc with a through hole at its center and a tapered groove at its bottom. Its bottom is connected to the machine tool via machine tool connecting bolts 7.

[0037] like Figure 1 and Figure 5 As shown, the guide plate 6 is fixed to the fixture base 2 by bolts. The guide groove formed by it can support the positioning clamping claw 4 and prevent it from tilting or swinging. At the same time, it can make the positioning clamping claw move within the predetermined trajectory of the guide groove to prevent it from deviating. The groove formed on the outside of the guide plate can avoid the screw and also reduce the weight of the entire guide plate.

[0038] like Figure 1 , Figure 3 and Figure 4As shown, the positioning clamping claw 4 is located on the fixture base 2 and placed in the guide groove formed by the guide plate 6. Under the tensioning force of the machine tool tie rod 8, it can move radially along the guide groove until it is close to the inner wall of the motor housing part, so as to provide a continuous internal support force on the motor housing part and realize the positioning and clamping of the part. In the non-working state, it can be retracted to increase the assembly gap to 1mm on one side, which facilitates the clamping of parts and avoids collisions. In addition, the groove formed at the inner end of the head of the positioning clamping claw 4 facilitates the application and storage of lubricant.

[0039] like Figure 2 and Figure 3 As shown, the top of the machine tool tie rod 8 and the bottom of the tapered pin 10 are fixedly connected by screws 9, and are arranged to slide through the central axis of the fixture base 2. The bottom is fixed to the machine tool by machine tool connecting bolts 7. The machine tool tie rod 8 is tightened and loosened by the machine tool control system according to preset program instructions. When a tightening instruction is received, the machine tool tie rod 8 drives the tapered pin 10 to move downward through the machine tool connecting bolts 7, overcoming the rebound force of the spring 5, and causing the positioning clamping claw 4 to move outward along the guide groove. By providing a continuous downward tightening force, the positioning clamping claw 4 moves until it is in close contact with the inner wall of the motor housing part, and continuously provides an internal support force on the motor housing part, realizing high-precision workpiece clamping and positioning, thereby enabling... Simultaneously, the upper and lower ends of the part are machined without secondary clamping, thus ensuring the coaxiality accuracy requirements of the machining. When a release command is received, the machine tool pull rod 8 moves the tapered pin 10 upward through the screw 9, reducing or releasing the tension. The positioning clamping jaw 4 moves inward along the guide groove under the action of the spring 5 until it returns to its original position, releasing the clamping of the motor housing part. In this way, the tensioning and releasing actions of the machine tool pull rod 8 can achieve high precision and repeatability, providing stable and reliable support and positioning for the machining of the workpiece. At the same time, since this action is fully automated by the machine tool control system, it can greatly reduce the labor intensity of workers and improve production efficiency.

[0040] like Figure 1 As shown, the outer support ring 1 is used for adjustment and accuracy correction when the fixture is not equipped with the motor housing part. In the state where the part is not assembled, the outer support ring 1 can self-machine the positioning clamping claw 4 while it is clamped by the machine tool to ensure the positioning accuracy of the positioning clamping claw 4. At the same time, the inner side is provided with a slot that matches the groove at the tail of the positioning clamping claw 4, so that it can be easily removed before clamping the part to ensure that the machining path of the tool is not interfered with.

[0041] like Figure 1 and Figure 6As shown, the limiting plate 3 is fixed to the guide plate 6 by bolts. It has a flat, circular shell structure, and its size covers the arc-shaped area formed by the outer side of the positioning clamping claw 4, serving functions such as safety protection and environmental isolation. A circular through hole is provided at the center of its upper plane. This circular through hole and the central through hole of the guide plate 6 are on the same axis, through which the tapered pin 10 can pass. A rectangular hole extends along the outer side of the circular through hole, and its size and position are adapted to the spring 5. The guide cover plate 11 is fixed to the limiting plate 3 by bolts. A guide hole is provided at the center of its top, which serves to protect and guide the clamping structure.

Claims

1. A clamp for a new energy motor housing, characterized in that: Includes a clamp base (2) with a through hole in the center and a positioning and clamping mechanism; The positioning and clamping mechanism includes a limiting plate (3), a guide plate (6), a positioning and clamping claw (4), a machine tool tie rod (8), and a tapered pin (10); The guide plate (6) is fixed on the fixture base (2), with a through hole in its center and a guide groove radially arranged outside the through hole; The tapered pin (10) has a stepped structure, with a cylindrical lower part and a frustum-shaped upper part. The small end of the frustum-shaped pin faces downward, and the outer diameter of the lower cylindrical part is smaller than the outer diameter of the small end of the frustum-shaped pin. The lower cylindrical part is located in the through hole of the guide plate (6) and slides with the guide plate (6). The lower end of the tapered pin (10) is connected to the upper end of the machine tool tie rod (8) to provide tension for the tapered pin (10). The positioning clamping claw (4) is set in the guide groove on the guide plate (6), and the inner end of its head is a cone-shaped surface that matches the frustum shape and abuts against the outer surface of the frustum. The guide plate (6) is provided with a limiting plate (3), and the frustum-shaped structure of the tapered pin (10) is provided in the through hole on the limiting plate (3). A spring (5) is provided between the head of the clamping claw (4) and the inner sidewall of the through hole of the limiting plate (3).

2. The clamp for a new energy motor housing according to claim 1, characterized in that: The upper part of the limiting plate (3) is equipped with a guide cover plate (11), and a guide hole is provided at the center of the inner side of the guide cover plate (11); The upper part of the cone-shaped pin (10) is provided with a guide post, which is located in the guide hole of the guide cover plate (11) and is used to provide guidance for the cone pin (10).

3. A clamp for a new energy motor housing according to claim 1, characterized in that: The limiting plate (3) is provided with a limiting groove, which is radially arranged along the outside of the through hole on the limiting plate (3); The head of the clamping claw (4) is provided with an upward protrusion, which is located in the limiting groove. One end of the spring (5) is connected to the outside of the protrusion, and the other end abuts against the bottom of the limiting groove.

4. A clamp for a new energy motor housing according to claim 3, characterized in that: The outer end of the head of the positioning clamping claw (4) is provided with a screw hole, and a guide post is connected thereto. The spring is fitted on the guide post and plays a guiding role for the spring.

5. A clamp for a new energy motor housing according to claim 1, characterized in that: The inner end of the head of the positioning clamping claw (4) is provided with a groove for applying lubricant.

6. A clamp for a new energy motor housing according to claim 5, characterized in that: The tail of the positioning clamping claw (4) is an arc-shaped structure extending to both sides, and the shape of its outer wall is adapted to the shape of the inner wall of the motor housing to be clamped.

7. A clamp for a new energy motor housing according to claim 6, characterized in that: The lower part of the outer side wall of the positioning clamping claw (4) has an inward groove. An outer support ring (1) is installed on the outer side of the positioning clamping claw (4). The inner wall of the groove is used to cooperate with the inner wall of the outer support ring (1) so that the outer support ring (1) can accurately position the tail of the positioning clamping claw (4).

8. A clamp for a new energy motor housing according to claim 2, characterized in that: The upper part of the tapered pin (10) is provided with a through hole, and a screw (9) is installed in the through hole. The upper end of the machine tool tie rod (8) is connected to the lower end of the tapered pin (10) by the screw (9).

9. A clamp for a new energy motor housing according to claim 1, characterized in that: The guide plate (6) has a circular boss on the upper part that is coaxial with the through hole, and the limiting plate (3) has a circular groove at the bottom that matches the circular boss. The circular boss is embedded in the circular groove and is used for the positioning of the guide plate (6) and the limiting plate (3).

10. A clamp for a new energy motor housing according to claim 1, characterized in that: The fixture base (2) is equipped with a machine tool connecting bolt (7) at the bottom, and a groove is provided in the center area of ​​its bottom for connecting with the machine tool. The guide plate (6) and the limiting plate (3) are provided with corresponding clearance grooves on their outer sides, and the machine tool connecting bolt (7) is installed in the clearance groove.

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