A battery cover riveting mechanism

Abstract

The utility model relates to a battery cover plate riveting mechanism, which belongs to the technical field of riveting equipment, in order to solve the problems in the prior art of battery pole assembly process using riveting, such as a large number of riveting equipment parts, large space occupied, long production cycle and low product yield. The application includes a frame and a riveting assembly, the frame is provided with a riveting table for placing the battery top cover sheet; the riveting assembly is slidably mounted on the frame, and is provided with a riveting head; the riveting head is provided with a forming part; the battery top cover sheet is provided with a pole hole for installing the battery pole; the riveting assembly slides along the frame toward the riveting table, driving the riveting head to abut against the side wall of the pole hole of the battery top cover sheet, and driving the riveting head to rotate to rivet the side wall of the pole hole; the side wall of the pole hole is extruded and formed by the forming part of the riveting head, forming a rolled flange abutting against the battery pole. The riveting mechanism of the present application does not require a horizontal driving component, has a small number of mechanism components, occupies a small space, and has high production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary riveting equipment, in particular to a rotary riveting mechanism for a battery cover. Background Art

[0002] In the power battery, the battery cover is provided with positive and negative battery pole mounting holes, namely pole holes, and the pole holes are penetrated with battery poles, as well as insulating parts provided to improve the insulation and sealing of the battery. In the production of existing power battery covers, the battery poles of the battery cover are generally assembled on the battery cover by two different processes. One process is by laser welding, and the other is assembly by riveting. The specific production process is: the pole hole on the battery cover is provided with a pole cover edge surrounding the pole hole, the battery pole and the insulating part are penetrated through the pole hole, and the pole cover edge is riveted by riveting equipment. After the pole cover edge is statically extruded and deformed, it is bent inward and abuts against the battery pole to achieve the installation of the battery pole.

[0003] In the prior art, the battery pole assembly process using the rotary riveting method, because the deformation of the pole cover edge is to bend inward and abut against the battery pole, that is, the pole cover edge is formed by rotary riveting in the radial and horizontal directions. Therefore, when the battery cover edge is produced by the existing rotary riveting method, the rotary riveting equipment needs to be provided with two drive components, which drive the rotary rivet head in the radial and horizontal directions respectively. At the same time, the rotary riveting equipment itself is provided with a drive component that drives the rotary rivet head to rotate, resulting in a large number of power drive components of the rotary riveting equipment. The rotary riveting equipment occupies a large space, and the production cycle of a single battery cover edge is long. In addition, in the existing rotary riveting method, because the rotary rivet head is in different directions for rotary riveting production, during the rotary riveting process, the battery pole will be displaced in the pole hole due to the different reverse forces of the rotary rivet head because the pole cover edge has not yet been formed, resulting in the failure of the rotary riveting, which reduces the product yield. Therefore, a rotary riveting mechanism is urgently needed to solve the problems in the prior art of battery pole assembly process using rotary riveting, such as a large number of rotary riveting equipment parts, large floor space, long production cycle and low product yield. Utility Model Content

[0004] The utility model aims to provide a battery cover plate riveting mechanism, which can effectively solve the problems in the prior art of battery pole assembly process using riveting method, such as large number of riveting equipment parts, large floor space, long production cycle and low product yield.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A battery cover riveting mechanism comprises a frame and a riveting assembly, wherein the frame is provided with a riveting table for placing a battery top cover sheet; the riveting assembly is slidably mounted on the frame and provided with a riveting head; the riveting head is provided with a forming portion; the battery top cover sheet is provided with a pole hole for installing a battery pole; the riveting assembly slides along the frame toward the riveting table, driving the riveting head to abut against a side wall of the pole hole of the battery top cover sheet, and driving the riveting head to rotate to rivet the side wall of the pole hole; the side wall of the pole hole is extruded and formed by the forming portion of the riveting head to form a rolled flange; the rolled flange abuts against the battery pole.

[0007] Among them, a pole locking assembly is also provided on the frame; the pole locking assembly includes a locking motor and a locking rod; the locking motor is fixedly installed on the frame, and its power end is connected to the locking rod; a locking head is provided at the end of the locking rod, and it is driven by the locking motor to slide toward the riveting table, and the battery pole is resisted and locked by the locking head.

[0008] Among them, a driving motor, a ball screw pair and a sliding guide rail are provided on the frame; the ball screw pair is rotatably installed on the frame, and its screw is connected to the power end of the driving motor, and the rivet assembly is slidably installed on the sliding guide rail, and one end of it is connected to the nut end of the ball screw pair.

[0009] Among them, the rivet assembly includes a mounting frame, a rivet motor and a rivet head unit; one end of the mounting frame is mounted on the nut end of the ball screw, and the other end is slidably mounted on the sliding guide rail, and a rivet head mounting hole is provided on the frame; the rivet head unit is rotatably mounted on the rivet head mounting hole, and one end of the rivet head unit is connected to the power end of the rivet motor.

[0010] Among them, the rivet head unit includes a rivet head mounting frame and a rivet head; the rivet head mounting frame is rotatably mounted on the rivet head mounting hole, and one end of the rivet head mounting frame is connected to the power end of the rivet motor; a through hole is opened on the frame body of the rivet head mounting frame, a locking rod passes through the through hole, and the locking rod is concentrically arranged with the through hole; the rivet head is installed on the through hole side of the rivet head mounting frame.

[0011] There are several rivet heads, and the rivet heads are evenly distributed on the rivet head mounting frame around the center of the through hole.

[0012] Among them, the rivet head includes a rivet head body and a rivet wheel; the rivet head body is fixedly installed on the rivet assembly, and one end of the rivet head body extends in a horizontal direction to form a mounting rod; the rivet wheel is radially rotatably installed on the mounting rod, and a forming portion is provided on the rivet wheel.

[0013] The riveting wheel is provided with a stepped riveting wheel surface, and the wheel surface at one end of the riveting wheel away from the mounting rod is a riveting wheel surface with a small diameter; the step surface between the riveting wheel surface with a large diameter and the riveting wheel surface with a small diameter of the riveting wheel is in a slope structure, and the step surface with the slope structure and the riveting wheel surface with a small diameter constitute the forming portion.

[0014] Wherein, the surface of the forming part is provided with a polishing layer formed by polishing treatment.

[0015] Among them, a number of limit blocks are arranged on the riveting table; a mounting groove whose shape is adapted to the shape of the battery top cover is enclosed between the limit blocks; a pole mounting hole is opened in the mounting groove at a position corresponding to the pole hole of the battery top cover for installing the battery pole.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] 1. The battery cover plate riveting mechanism provided in the above technical solution is provided with a riveting table and a riveting assembly on the frame, wherein the riveting table is used to place the battery top cover sheet and the battery pole; the riveting assembly is radially slidably installed on the frame toward the riveting table, driving the riveting head to slide toward the battery top cover sheet and riveting the side wall of the pole hole of the battery top cover sheet. At the same time, the riveting head of the present application is provided with a forming part, so that when riveting, the side wall of the pole hole is extruded and formed by the forming part of the riveting head to form a rolled flange; the rolled flange abuts against the battery pole. The riveting mechanism of the present application only needs to be provided with a driving motor to drive the riveting head to perform riveting in the radial direction, and no horizontal driving components are required, so as to reduce the number of mechanism components and the space occupied by the mechanism, while shortening the production cycle and achieving high production efficiency.

[0018] 2. Based on the above, the present application forms a mounting groove for the battery top cover sheet by setting a pole locking assembly and setting a limit block on the riveting table. This enables the battery top cover sheet and the battery pole of the battery cover to be quickly positioned and installed on the riveting table, and during the riveting process, the pole locking assembly is used to stop and lock the battery pole, thereby preventing the displacement of the battery pole and improving the product yield.

[0019] 3. On the basis of the above, the present application sets a number of rivet heads spaced evenly on the rivet head mounting frame, and the rivet head includes a rivet head body and a rivet wheel, wherein the rivet wheel is rotatably mounted on the mounting rod of the rivet head body, and the rivet wheel is provided with a stepped rivet wheel surface. When the side wall of the pole hole is riveted, the side wall is deformed in the radial and horizontal directions under the extrusion of the stepped rivet wheel surface, and is bent inward along the rivet wheel surface and abuts against the battery pole. At the same time, since the side wall is deformed in the radial and horizontal directions at the same time, the rolled flange automatically forms an arc chamfer structure at the bend, and the arc chamfer can effectively ensure that stress concentration does not occur at the bend during the riveting process, improve the mechanical properties of the rolled flange, and avoid cracking or breaking. The arc chamfer structure can also improve the appearance and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of the battery cover riveting mechanism of this embodiment;

[0021] Figure 2 This is a structural front view of the battery cover riveting mechanism of this embodiment;

[0022] Figure 3 This is a structural cross-sectional view of the battery cover riveting mechanism of this embodiment;

[0023] Figure 4 It is a structural schematic diagram of the pole locking assembly of the battery cover riveting mechanism of this embodiment;

[0024] Figure 5 Schematic diagram of the structure of the riveting assembly of the riveting mechanism for the battery cover of this embodiment (the riveting wheel is not shown);

[0025] Figure 6 It is a structural schematic diagram of the riveting wheel of the battery cover riveting mechanism of this embodiment;

[0026] Figure 7 Schematic diagram of the structure of the battery cover plate of this embodiment (the battery pole is not placed in the pole hole on one side of the battery top cover plate);

[0027] Figure 8 It is a structural schematic diagram of the riveting table of the battery cover riveting mechanism of this embodiment. DETAILED DESCRIPTION

[0028] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0029] The technical solutions adopted in this application are as follows: Figure 1-Figure 8 As shown, a battery cover plate riveting mechanism includes a frame 9 and a riveting assembly 5. The frame 9 is provided with a riveting platform 1 for placing a battery top cover sheet 2. Among them, the riveting platform 1 is provided with four limit blocks 10; the four limit blocks enclose a mounting groove 11 whose shape matches the shape of the battery top cover sheet; a pole mounting hole 12 is provided in the mounting groove 11 at a position corresponding to the pole hole of the battery top cover sheet for installing the battery pole 3. The riveting assembly 5 is slidably mounted on the frame, and is provided with a riveting head 6; the riveting head is provided with a forming part; the battery top cover sheet 2 is provided with a pole hole 13 for installing the battery pole 3; the riveting assembly slides along the frame toward the riveting platform, driving the riveting head to abut against the side wall of the pole hole of the battery top cover sheet, and driving the riveting head to rotate to rivet the side wall of the pole hole; the side wall of the pole hole is extruded and formed by the forming part of the riveting head, forming a rolled flange; the rolled flange abuts against the battery pole.

[0030] The frame of this embodiment is also provided with a pole locking assembly 7; the pole locking assembly includes a locking motor 70 and a locking rod 71; the locking motor 70 is fixedly installed on the frame, and its power end is connected to the locking rod 71; a locking head 72 is provided at the end of the locking rod, and it is driven by the locking motor to slide toward the riveting table, and the battery pole is stopped and locked by the locking head.

[0031] The frame of the present embodiment is provided with a driving motor 90, a ball screw pair 91 and a sliding guide rail 92 along the radial direction; the ball screw pair 91 is rotatably mounted on the frame, and its screw is connected to the power end of the driving motor 90, and the rivet assembly is slidably mounted on the sliding guide rail, and one end of it is connected to the nut end of the ball screw pair. The rivet assembly 5 of the present embodiment includes a mounting frame 50, a rivet motor 51 and a rivet head unit; one end of the mounting frame is mounted on the nut end of the ball screw, and the other end is slidably mounted on the sliding guide rail, and a rivet head mounting hole is provided on the frame; the rivet head unit is rotatably mounted on the rivet head mounting hole, and one end of it is connected to the power end of the rivet motor. The rivet head unit includes a rivet head mounting frame 52 and a rivet head 6; the rivet head mounting frame is rotatably mounted on the rivet head mounting hole, and one end of the rivet head mounting frame is connected to the power end of the rivet motor; a through hole is provided on the frame body of the rivet head mounting frame, a locking rod passes through the through hole, and the locking rod is concentrically arranged with the through hole; the rivet head is installed on the through hole side of the rivet head mounting frame. There are two rivet heads, and the two rivet heads are evenly distributed on the rivet head mounting frame at intervals of the through hole center. The rivet head 6 includes a rivet head body 61 and a rivet wheel 62; the rivet head body is fixedly mounted on the rivet assembly, and one end of the rivet head body extends in the horizontal direction to form a mounting rod; the rivet wheel 62 is rotatably mounted on the mounting rod in the radial direction, and a forming portion is provided on the rivet wheel.

[0032] In addition, the spin riveting wheel 62 of this embodiment is provided with a stepped spin riveting wheel surface, and the wheel surface at the end of the spin riveting wheel away from the mounting rod is a spin riveting wheel surface 63 with a small diameter; the step surface 65 between the spin riveting wheel surface 64 with a large diameter and the spin riveting wheel surface with a small diameter is in a slope structure, and the step surface of the slope structure and the spin riveting wheel surface with a small diameter constitute a forming portion. In addition, the surface of the forming portion is provided with a polishing layer formed by polishing treatment.

[0033] Working principle: When the battery cover riveting mechanism of this embodiment is working, the operator first adjusts the driving components of the riveting mechanism according to the size specifications and riveting requirements of the top cover sheet of the battery cover and the battery pole, and sets a high-precision and stable servo power supply to the drive motor, the locking motor and the riveting motor. Then, the riveting head can be accurately controlled to rivet the side wall of the pole hole and the locking rod can be controlled to stop the pole.

[0034] During the riveting production, the operator first installs the battery top cover sheet into the mounting groove of the riveting table, and then installs the seal 4 and the battery pole into the pole hole of the battery top cover sheet. Then the mechanism is started, first the locking motor is started, the driving power end is extended toward the riveting table, and the locking head of the locking rod is driven to stop and lock the battery pole. Then the driving motor is started, and the screw of the ball screw pair is driven to rotate to drive the mounting frame of the riveting assembly to slide toward the riveting table until the step surface of the ramp structure of the riveting head forming part is driven to abut against the side wall of the pole hole. Then the riveting motor is started, and the riveting head mounting frame is driven to rotate, driving the two riveting wheels to rivet the side wall of the pole hole. During riveting, the driving motor continues to feed radially, and the side wall of the pole hole is deformed in the radial and horizontal directions under the extrusion of the forming part of the riveting wheel, and is bent and extended inward along the wheel surface of the forming part until a rolling flange is formed to abut against the battery pole, completing the riveting work of the battery pole. It should be noted that, since the side of the pole hole is deformed in the radial and horizontal directions at the same time, the bending part of the rolled flange presents an arc-shaped chamfered structure, which can effectively avoid stress concentration at the bending part and prevent cracks or cracks from occurring.

[0035] The implementation methods of the present application are described in detail above in conjunction with the embodiments, but the present application is not limited to the above-mentioned implementation methods. For ordinary technicians in this technical field, after knowing the contents recorded in the present application, they can make several equivalent changes and substitutions thereto without departing from the principles of the present application, and these equivalent changes and substitutions should also be regarded as belonging to the protection scope of the present application.

Claims

1. A battery cover riveting mechanism, comprising a frame and a riveting assembly, characterized in that: The frame is provided with a rivet table for placing the battery top cover sheet; the rivet assembly is slidably mounted on the frame and is provided with a rivet head; the rivet head is provided with a forming portion; the battery top cover sheet is provided with a pole hole for installing the battery pole; the rivet assembly slides along the frame toward the rivet table, driving the rivet head to abut against the side wall of the pole hole of the battery top cover sheet, and driving the rivet head to rotate to rivet the side wall of the pole hole; the side wall of the pole hole is extruded and formed by the forming portion of the rivet head to form a rolled flange; the rolled flange abuts against the battery pole.

2. A battery cover riveting mechanism according to claim 1, characterized in that: The frame is also provided with a pole locking assembly; the pole locking assembly includes a locking motor and a locking rod; the locking motor is fixedly mounted on the frame, and its power end is connected to the locking rod; a locking head is provided at the end of the locking rod, and the locking head is driven by the locking motor to slide toward the riveting table, and the battery pole is stopped and locked by the locking head.

3. A battery cover riveting mechanism according to claim 2, characterized in that: The frame is provided with a driving motor, a ball screw pair and a sliding guide rail along the radial direction; the ball screw pair is rotatably mounted on the frame, and its screw is connected to the power end of the driving motor; the rotary riveting assembly is slidably mounted on the sliding guide rail, and one end of the rotary riveting assembly is connected to the nut end of the ball screw pair.

4. A battery cover riveting mechanism according to claim 3, characterized in that: The rivet assembly comprises a mounting frame, a rivet motor and a rivet head unit; one end of the mounting frame is mounted on the nut end of the ball screw, and the other end is slidably mounted on the sliding guide rail, and a rivet head mounting hole is provided on the frame; the rivet head unit is rotatably mounted on the rivet head mounting hole, and one end of the rivet head unit is connected to the power end of the rivet motor.

5. A battery cover riveting mechanism according to claim 4, characterized in that: The rivet head unit comprises a rivet head mounting frame and a rivet head; the rivet head mounting frame is rotatably mounted on the rivet head mounting hole, and one end of the rivet head mounting frame is connected to the power end of the rivet motor; a through hole is provided on the frame body of the rivet head mounting frame, the locking rod passes through the through hole, and the locking rod is concentrically arranged with the through hole; the rivet head is mounted on the through hole side of the rivet head mounting frame.

6. A battery cover riveting mechanism according to claim 5, characterized in that: The number of the rotary rivet heads is several, and the several rotary rivet heads are evenly distributed on the rotary rivet head mounting frame around the center of the through hole.

7. A battery cover riveting mechanism according to claim 1, characterized in that: The rotary rivet head comprises a rotary rivet head body and a rotary rivet wheel; the rotary rivet head body is fixedly installed on the rotary rivet assembly, and one end of the rotary rivet head body extends in a horizontal direction to form a mounting rod; the rotary rivet wheel is radially rotatably installed on the mounting rod, and the rotary rivet wheel is provided with the forming portion.

8. A battery cover riveting mechanism according to claim 7, characterized in that: The rotary riveting wheel is provided with a stepped rotary riveting wheel surface, and the wheel surface at one end of the rotary riveting wheel away from the mounting rod is a rotary riveting wheel surface with a small diameter; the step surface between the rotary riveting wheel surface with a large diameter and the rotary riveting wheel surface with a small diameter of the rotary riveting wheel is in a slope structure, and the step surface with the slope structure and the rotary riveting wheel surface with a small diameter constitute the forming portion.

9. A battery cover riveting mechanism according to claim 1, characterized in that: The surface of the forming part is provided with a polishing layer formed by polishing treatment.

10. A battery cover riveting mechanism according to claim 1, characterized in that: The riveting table is provided with a plurality of limit blocks; a mounting groove whose shape matches the shape of the battery top cover sheet is enclosed between the limit blocks; a pole mounting hole is opened in the mounting groove at a position corresponding to the pole hole of the battery top cover sheet for mounting the battery pole.

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