New energy electric drive grounding ring press-fit assembly tool clamp

Abstract

This utility model discloses a new energy electric drive grounding ring pressing and assembly fixture, including a lower pressing fixture and an upper pressing head. The upper pressing head is connected to an external press. The lower pressing fixture includes: a base, a support worktable fixed to the upper surface of the base, and a mold shaft perpendicular to the center of the top surface of the support worktable. The top surface of the support worktable has an annular three-claw skeleton for positioning the grounding ring. The axis of the mold shaft is collinear with the axis of the upper pressing head. The spring plate of the grounding ring is sleeved on the outside of the mold shaft. The PTFE sheet of the grounding ring is embedded between the inner wall of the annular three-claw skeleton and the spring plate. The upper pressing head can apply a pressing force to the PTFE sheet when it presses down. In this way, the relative positions of the spring plate, PTFE sheet and annular three-claw skeleton are accurate, avoiding assembly misalignment that affects product performance. There is no relative sliding of the components during the pressing process, ensuring product consistency. The fixture has a simple structure, which is convenient for operators to quickly load and unload workpieces. It can be used with a press to achieve automated pressing and meet the needs of mass production.

Description

Technical Field

[0001] This utility model relates to the field of new energy electric drive technology, and in particular to a new energy electric drive grounding ring pressing and assembly tooling fixture. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the electric drive system, as a core component, directly affects the performance of the entire vehicle due to its durability and stability. To protect the motor spindle from electrolytic corrosion, the grounding ring (conductive ring), as a critical protective component, faces extremely high requirements in terms of performance indicators and production efficiency.

[0003] In the existing grounding ring assembly process, due to the special product structure (composed of multiple nested components such as a ring-shaped three-claw skeleton, PTFE sheet and spring sheet), the PTFE sheet is a sheet material made of polytetrafluoroethylene (PTFE) resin through processes such as molding, turning or calendering. Traditional assembly fixtures have the following problems: (1) Insufficient positioning accuracy of each component, which easily leads to misalignment of the PTFE sheet and spring sheet, affecting the conductivity of the grounding ring; (2) Poor stability of the assembly process, large human operation error, and difficulty in ensuring product consistency; (3) Complex fixture structure, which is not convenient for rapid loading and unloading and efficient pressing during mass production, and cannot meet the needs of customers for large-scale production.

[0004] Therefore, there is an urgent need for a grounding ring pressing and assembly fixture that can achieve high quality, high stability, and high-efficiency mass production. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a new energy electric drive grounding ring pressing and assembly tooling fixture.

[0006] This utility model proposes a new energy electric drive grounding ring pressing and assembly fixture, including a lower pressing fixture and an upper pressing head. The upper pressing head is connected to an external press. The lower pressing fixture includes: a base, a support worktable fixed to the upper surface of the base, and a mold shaft vertically disposed at the center of the top surface of the support worktable. The top surface of the support worktable is used to position the annular three-claw skeleton of the grounding ring. The axis of the mold shaft is collinear with the axis of the upper pressing head, and the spring sheet of the grounding ring is sleeved on the outside of the mold shaft. The PTFE sheet of the grounding ring is embedded between the inner wall of the annular three-claw skeleton and the spring sheet. The upper pressing head can apply a pressing force to the PTFE sheet when it presses down.

[0007] Preferably, the spring sheet is an integral structure comprising an annular base and multiple side pieces. The multiple side pieces are distributed along the circumferential edge of the annular base and extend upward. The multiple side pieces surround and fit against the outer wall of the mold shaft. The outer diameter of the mold shaft is adapted to the inner hole size of the spring sheet for radial positioning of the spring sheet.

[0008] Preferably, the upper pressure head is a columnar structure, with its top end fixedly connected to the output end of an external press. When the press is started, the upper pressure head is moved up and down in the vertical direction to axially press the assembled grounding ring.

[0009] Preferably, the bottom end of the upper pressure head is provided with a flat annular pressing surface, which contacts the upper surface of the PTFE sheet during pressing.

[0010] Preferably, the supporting workbench includes a cylindrical base fixed on the base and a cylindrical support platform fixed at the center of the top surface of the cylindrical base. The mold shaft is fixed at the center of the top surface of the cylindrical support platform. An annular outer platform is sleeved on the outer side of the cylindrical support platform. The upper top surface of the annular outer platform is lower than the upper top surface of the cylindrical support platform. A cylindrical fixing platform is sleeved on its outer side. The upper top surface of the cylindrical support platform is provided with a positioning groove for accommodating the annular base plate. The bottom surface of the annular three-claw skeleton contacts and positions itself with the outer edge of the positioning groove and the upper top surface of the annular outer platform. The upper end surface of the cylindrical fixing platform is provided with three skeleton grooves that respectively match the three skeleton claws of the annular three-claw skeleton.

[0011] Preferably, the cross-sectional area of ​​the mold shaft gradually decreases from bottom to top.

[0012] In summary, this utility model has the following beneficial effects: (1) High positioning accuracy: By radially limiting the spring sheet with the mold shaft, bearing and positioning the ring three-jaw skeleton with the support worktable, and coaxial design of the upper pressure head and the mold shaft, the relative positions of the spring sheet, PTFE sheet and ring three-jaw skeleton are ensured to be accurate, avoiding assembly offset that affects product performance; (2) Strong assembly stability: The side plate of the spring sheet is tightly fitted with the mold shaft, and the PTFE sheet is limited between the inner wall of the ring three-jaw skeleton and the side plate. During the pressing process, there is no relative sliding of each component, ensuring product consistency; (3) Improved production efficiency: The tooling structure is simple, the assembly steps are clear, and it is convenient for operators to quickly load and unload workpieces. It can be used with the press to achieve automated pressing and meet the needs of mass production; (4) Good adaptability: The size of the mold shaft can be changed according to the inner hole specifications of the spring sheet of different models of grounding rings. The height of the support worktable and the stroke of the upper pressure head can be adjusted to adapt to the assembly needs of various specifications of grounding rings.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the upper pressure head according to an embodiment of the present utility model;

[0015] Figure 2 This is a perspective structural diagram of the base according to an embodiment of the present utility model;

[0016] Figure 3 The three-dimensional structure of the support workbench according to an embodiment of this utility model Figure 1 ;

[0017] Figure 4 The three-dimensional structure of the support workbench according to an embodiment of this utility model Figure 2 ;

[0018] Figure 5 A three-dimensional structural diagram of a support workbench with a grounding ring for positioning, according to an embodiment of this utility model;

[0019] Figure 6 for Figure 5 A sectional view.

[0020] In the picture:

[0021] 1. Base; 11. Fixing column; 111. Mounting hole; 2. Mold shaft;

[0022] 3. Grounding ring; 31. Ring-shaped three-jaw frame; 311. Frame claw; 32. Spring plate; 321. Ring-shaped base plate; 322. Side plate; 33. PTFE sheet;

[0023] 4. Support worktable; 41. Cylindrical base; 411. Mounting column; 42. Cylindrical support platform; 421. Positioning groove; 43. Annular outer platform; 44. Cylindrical fixing platform; 441. Skeleton groove. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] like Figure 1-6As shown, this embodiment proposes a new energy electric drive grounding ring pressing assembly fixture, including a lower pressing fixture and an upper pressing head. The upper pressing head is connected to an external press. The lower pressing fixture includes: a base 1, a support worktable 4 fixed to the upper surface of the base 1, and a mold shaft 2 vertically disposed at the center of the top surface of the support worktable 4. The top surface of the support worktable 4 is used to position the annular three-claw skeleton 31 of the grounding ring 3. The axis of the mold shaft 2 is collinear with the axis of the upper pressing head, and the spring plate 32 of the grounding ring 3 is sleeved on the outside of the mold shaft 2. The PTFE sheet 33 of the grounding ring 3 is embedded between the inner wall of the annular three-claw skeleton 31 and the spring plate 32. The upper pressing head can apply a pressing force to the PTFE sheet 33 when it presses down.

[0026] Thus, the positioning accuracy is high: the radial limiting of the spring plate 32 by the mold shaft 2, the bearing positioning of the annular three-jaw skeleton 31 by the support worktable 4, and the coaxial design of the upper pressure head and the mold shaft 2 ensure the precise relative position of the spring plate 32, PTFE plate 33 and annular three-jaw skeleton 31, avoiding assembly misalignment that affects product performance; the assembly stability is strong: the side plate of the spring plate 32 fits tightly with the mold shaft 2, and the PTFE plate 33 is confined between the inner wall of the annular three-jaw skeleton 31 and the side plate. There is no relative sliding of the components during the pressing process, ensuring product consistency; the production efficiency is improved: the tooling structure is simple, the assembly steps are clear, and it is convenient for operators to quickly load and unload workpieces. It can be used with the press to achieve automated pressing and meet the needs of mass production; the adaptability is good: the size of the mold shaft 2 can be replaced according to the inner hole specifications of the spring plate 32 of different models of grounding rings 3, and the height of the support worktable 4 and the stroke of the upper pressure head are adjustable to adapt to the assembly needs of various specifications of grounding rings.

[0027] Furthermore, the spring sheet 32 ​​is designed as an integral structure, including an annular base sheet 321 and multiple side sheets 322. The multiple side sheets 322 are distributed along the circumferential edge of the annular base sheet 321 and extend upward. The multiple side sheets 322 surround and fit against the outer wall of the mold shaft 2. The outer diameter of the mold shaft 2 is adapted to the inner hole size of the spring sheet 32 ​​for radial positioning of the spring sheet 32.

[0028] Furthermore, the upper pressure head is designed as a columnar structure, with its top end fixedly connected to the output end of the external press. When the press is started, the upper pressure head moves up and down in the vertical direction to axially press the assembled grounding ring 3.

[0029] The bottom end of the upper pressure head is provided with a flat annular pressing surface, which contacts the upper surface of the PTFE sheet 33 during pressing.

[0030] In this embodiment, the support workbench 4 includes a cylindrical base 41 fixed on the base 1 and a cylindrical support platform 42 fixed at the center of the top surface of the cylindrical base 41. The mold shaft 2 is fixed at the center of the top surface of the cylindrical support platform 42. An annular outer platform 43 is sleeved on the outer side of the cylindrical support platform 42. The upper top surface of the annular outer platform 43 is lower than the upper top surface of the cylindrical support platform 42. A cylindrical fixing platform 44 is sleeved on its outer side. The upper top surface of the cylindrical support platform 42 is provided with a positioning groove 421 for accommodating the annular base plate. The bottom surface of the annular three-claw skeleton 31 contacts and positions itself with the outer edge top surface of the positioning groove 421 and the upper top surface of the annular outer platform 43. The upper end surface of the cylindrical fixing platform 44 is provided with three skeleton grooves 441 that respectively match the three skeleton claws 311 of the annular three-claw skeleton 31. In this way, the positioning of the annular three-jaw frame 31, PTFE sheet 33 and spring sheet 32 ​​can be achieved, ensuring that the relative positions of the spring sheet 32, PTFE sheet 33 and annular three-jaw frame 31 are accurate, and avoiding assembly misalignment that affects product performance.

[0031] Specifically, a fixing post 11 is provided at the center of the top surface of the base 1, and a mounting hole 111 is provided at the top of the fixing post. A mounting post 411 is provided at the center of the lower end of the cylindrical base 41, and the mounting post 411 can be matched with the mounting hole 111 for installation.

[0032] It should be noted that the cross-sectional area of ​​the mold shaft 2 gradually decreases from bottom to top, forming a tapered transition structure that is narrower at the top and wider at the bottom. When the spring plate 32 is fitted, it can naturally align with the central axis through the tapered guide surface, reducing manual alignment adjustment time. Even if there is a slight misalignment during installation, the inclined sidewall of the mold shaft 2 will guide the spring plate 32 to automatically correct its position, reducing the difficulty of assembly operations, especially suitable for the rapid material loading requirements in mass production scenarios. The larger cross-sectional area of ​​the lower part of the mold shaft 2 can reliably fit with the inner hole of the spring plate 32, ensuring that the spring plate 32 will not experience radial wobble during pressing. The gradually decreasing upper structure allows the side plates 322 of the spring plate 32 to naturally conform to the sidewall of the mold shaft 2 after fitting. As the assembly depth increases, the contact pressure between the side plates 322 and the mold shaft 2 gradually becomes more uniform, avoiding side impact caused by localized stress concentration. The gradual deformation of the spring sheet 32 ​​ensures stable radial positioning of the spring sheet 32 ​​throughout the entire process from installation to pressing, further guaranteeing the relative positional accuracy of each component of the grounding ring 3. During the pressing process, the axial force applied by the upper pressure head is transmitted to the annular bottom plate 321 of the spring sheet 32 ​​through the PTFE sheet 33. Due to the large cross-sectional area of ​​the lower part of the mold shaft 2, a stable support is formed for the bottom of the spring sheet 32, preventing the spring sheet 32 ​​from warping due to uneven force during pressing. The upper gradual structure can reduce the radial constraint on the side plates of the spring sheet 32, allowing the side plates to deform appropriately under pressure to adapt to the embedding requirements of the PTFE sheet 33. This ensures the tight fit between the PTFE sheet 33 and the annular three-claw skeleton 31 and the spring sheet 32, improving the overall stability of the grounding ring 3.

[0033] In summary, the assembly process of the grounding ring 3 using the tooling fixture in this embodiment is as follows:

[0034] S1, Align the inner hole of the spring plate 32 with the mold shaft 2 and install it, so that the annular bottom plate 321 of the spring plate 32 is placed horizontally in the positioning groove 421, and the multiple side plates 322 naturally fit against the outer wall of the mold shaft 2.

[0035] S2, place the annular three-jaw skeleton 31 stably on the top surface of the outer edge of the positioning groove 421 and the top surface of the annular outer platform 43, ensuring that its center is coaxial with the axis of the mold shaft 2;

[0036] S3, insert the PTFE sheet 33 along the annular inner wall of the annular three-claw skeleton 31, so that the lower end face of the PTFE sheet 33 contacts the upper surface of the annular bottom plate 321 of the spring sheet 32;

[0037] S4, start the press to drive the upper pressure head to move downward, the pressing surface of the upper pressure head contacts the upper surface of the PTFE sheet 33 and applies a preset pressure to complete the tight pressing of the PTFE sheet 33 with the annular three-claw skeleton 31 and the spring sheet 32;

[0038] S5, the press drive head returns to its original position, removes the grounding ring 3 after pressing, and completes one assembly.

[0039] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fixture for pressing and assembling grounding rings for new energy electric drives, comprising a lower pressing fixture and an upper pressing head, wherein the upper pressing head is connected to an external press, characterized in that, The pressing fixture includes: a base (1), a support worktable (4) fixed to the upper surface of the base (1), and a mold shaft (2) vertically disposed at the center of the top surface of the support worktable (4). The top surface of the support worktable (4) is used to position the annular three-jaw skeleton (31) of the grounding ring (3). The axis of the mold shaft (2) is collinear with the axis of the upper pressing head. The spring sheet (32) of the grounding ring (3) is sleeved on the outside of the mold shaft (2). The PTFE sheet (33) of the grounding ring (3) is embedded between the inner wall of the annular three-jaw skeleton (31) and the spring sheet (32). The pressing head can apply a pressing force to the PTFE sheet (33) when it presses down.

2. The new energy electric drive grounding ring pressing and assembly tooling fixture according to claim 1, characterized in that, The spring sheet (32) is an integral structure, including an annular base plate (321) and multiple side plates (322). The multiple side plates (322) are distributed along the circumferential edge of the annular base plate (321) and extend upward. The multiple side plates (322) surround and fit against the outer wall of the mold shaft (2). The outer diameter of the mold shaft (2) is adapted to the inner hole size of the spring sheet (32) for radial positioning of the spring sheet (32).

3. The new energy electric drive grounding ring pressing and assembly fixture according to claim 1, characterized in that, The upper pressure head is designed as a columnar structure, with its top end fixedly connected to the output end of the external press. When the press is started, the upper pressure head is moved up and down in the vertical direction to axially press the assembled grounding ring (3).

4. The new energy electric drive grounding ring pressing and assembly fixture according to claim 3, characterized in that, The bottom end of the upper pressure head is provided with a flat annular pressing surface, which contacts the upper surface of the PTFE sheet (33) during pressing.

5. The new energy electric drive grounding ring pressing and assembly fixture according to claim 2, characterized in that, The support workbench (4) includes a cylindrical base (41) fixed on the base (1) and a cylindrical support platform (42) fixed at the center of the top surface of the cylindrical base (41). The mold shaft (2) is fixed at the center of the top surface of the cylindrical support platform (42). An annular outer platform (43) is sleeved on the outer side of the cylindrical support platform (42). The top surface of the annular outer platform (43) is lower than the top surface of the cylindrical support platform (42). A cylindrical fixing platform (44) is sleeved on its outer side. The top surface of the cylindrical support platform (42) is provided with a positioning groove (421) for accommodating the annular base plate. The bottom surface of the annular three-claw skeleton (31) contacts and positions the top surface of the outer edge of the positioning groove (421) and the top surface of the annular outer platform (43). The upper end surface of the cylindrical fixing platform (44) is provided with three skeleton grooves (441) that match the three skeleton claws (311) of the annular three-claw skeleton (31).

6. The new energy electric drive grounding ring pressing and assembly fixture according to claim 1, characterized in that, The cross-sectional area of ​​the mold shaft (2) gradually decreases from bottom to top.

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