Battery box housing sleeve double-sided bushing pressure assembly device

Abstract

This invention relates to the field of assembly technology, specifically to a pressure assembly device for double-sided bushings of a battery box housing sleeve. The device includes a pressure assembly machine, on one side of which is a robotic arm for gripping the battery box. The end effector of the robotic arm clamps and fixes the battery box in place. Multiple through-hole assembly sleeves are provided on both sides of the battery box. The pressure assembly machine consists of a support assembly and two bushing pressing assemblies, located at the top and bottom of the battery box, respectively. This pressure assembly device for double-sided bushings of a battery box housing sleeve, through a horizontal compensation component in the pressure assembly section, compensates for misalignment between the assembly sleeves and bushings during assembly by horizontally moving a floating pressure head. This prevents inaccurate assembly caused by misalignment between the bushings and assembly sleeves.

Description

Technical Field

[0001] This invention relates to the field of assembly technology, specifically to a pressure assembly device for double-sided bushings of a battery box housing sleeve. Background Technology

[0002] The new energy truck battery pack is a power battery carrying and safety protection system designed specifically for heavy-duty commercial vehicles. Compared with passenger car battery boxes, it has more stringent requirements in terms of capacity, structural strength, protection level and thermal management to adapt to heavy-load, long-distance and high-intensity operation scenarios. The battery pack is installed at multiple mounting points. Each mounting point of the battery pack is pressure-fitted with a rubber bushing from the top and bottom. The bottom is deep hole press-fitted and the top is shallow hole press-fitted.

[0003] The battery pack itself is heavy, which increases the load on the robotic arm. The robotic arm with a heavy load has low repeatability and positioning accuracy, which reduces the vertical positioning accuracy of the battery pack sleeve and bushing pressing mechanism, affecting the assembly quality. At the same time, the robotic arm may also be angularly misaligned. In deep hole pressing, the pressing part needs to penetrate deep into the sleeve. Due to the angular positioning misalignment, the rigid wear between the pressing part and the inner wall of the sleeve will be aggravated during the insertion of the pressing part into the sleeve, which will cause structural damage to the product and the bushing pressing mechanism. To address this, we propose a double-sided bushing pressure assembly device for the battery box sleeve. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure assembly device for double-sided bushings of a battery box housing sleeve, to solve the problems mentioned in the background art, such as the low repeatability of the heavy-load robotic arm, reduced vertical position accuracy of the battery pack sleeve and bushing pressing mechanism, angular position deviation of the robotic arm, and rigid wear between the pressing part and the inner wall of the sleeve during deep hole pressing. To achieve the above objective, this invention provides the following technical solution: a pressure assembly device for double-sided bushings of a battery box housing sleeve, including a pressure assembly machine. One side of the pressure assembly machine is equipped with a robotic arm for gripping the battery box. The end effector of the robotic arm clamps and fixes the battery box. Multiple vertically penetrating bushings are provided on both sides of the battery box. The pressure assembly machine consists of a support assembly and two bushing pressing assemblies, located at the top and bottom of the battery box respectively. The two bushing pressing assemblies are symmetrically distributed vertically. It consists of a driving part, a pressure assembly part, and a pressure-bearing part. The pressure-bearing part includes a second cylinder and a first cylinder. The output ends of the second cylinder and the first cylinder are fixedly connected to a connecting rod. The end of the connecting rod on the output end of the second cylinder is engaged with a laterally movable limiting plate. The limiting plate has a clearance groove on the side away from the second cylinder, and the clearance groove is used to avoid the connecting rod on the first cylinder. The limiting plate in each bushing press assembly can be used to limit the position of the output end of the first cylinder in the bushing press assembly and bear the force during the assembly process of the driving part driving the pressure assembly part.

[0005] More preferably, the support assembly consists of a predetermined core and a lifting sliding part. The predetermined core includes a lifting frame located between the robotic arm and the pressure assembly machine, and a base located at the bottom of the pressure assembly machine. A push rod motor is fixedly connected to the top of the lifting frame, and a housing is fixedly connected to the output end of the push rod motor. A limiting sleeve is fixedly connected to the bottom inner wall of the housing, and a contact pad is fixedly sleeved on the outer wall of the limiting sleeve, with the bottom of the contact pad abutting against the bottom inner wall of the housing. A first spring is movably connected inside the limiting sleeve, with the bottom of the first spring abutting against the bottom inner wall of the housing. A fixing ring is slidably connected up and down inside the housing, and a lifting rod is fixedly connected to the top of the fixing ring. A groove for limiting the first spring is formed at the bottom of the lifting rod, and the top of the first spring abuts against the top inner wall of the groove. An elastic pad is fixedly connected to the bottom of the fixing ring, and the elastic pad is electrically connected to the contact pad.

[0006] More preferably, the lifting and sliding part includes two first slide rails symmetrically distributed vertically, and both first slide rails are fixedly connected to the inner wall of one side of the bracket opening. A lifting platform is slidably adapted on each of the two first slide rails. The two lifting platforms are symmetrically distributed vertically. A second cylinder is fixedly connected to the inner corner of the lifting platform. The two first cylinders are respectively fixedly connected to the opposite sides of the two lifting platforms. A second slide rail that is slidably adapted to the limiting plate is fixedly connected to the opposite side of the two lifting platforms.

[0007] More preferably, the drive unit includes two electronic presses fixedly connected to the top and bottom sides of the bracket respectively, and the output end of the electronic presses movably passes through the bracket. The output end of the electronic presses is connected to the lifting platform through a coupling. The output end of the electronic presses passes through the bracket and is fixedly connected to a connecting seat. The side of the connecting seat away from the electronic presses is fixedly connected to the lifting platform.

[0008] More preferably, the pressure assembly part includes an internal pressure head assembly unit and a pressure transmission unit. The pressure transmission unit includes a protective cover fixedly connected to one side of each of the two lifting platforms. A guide sleeve is fixedly connected to the side of the protective cover away from the lifting platform. An external pressure head is fixedly connected to the side of the guide sleeve away from the lifting platform. A connecting bolt is slidably connected up and down inside the protective cover and the guide sleeve. The end of the connecting bolt near the lifting platform is engaged with the end of the connecting rod on the output end of the first cylinder.

[0009] More preferably, the internal pressure head assembly unit consists of a horizontal compensation component and a pressing component. The horizontal compensation component includes a compensation pressure head fixedly connected to the end of the connecting bolt away from the lifting platform. A movable cavity is formed on the side of the compensation pressure head away from the connecting bolt. A clearance cavity is formed on the inner edge of the movable cavity. A positioning ring is fixedly connected to the side of the compensation pressure head away from the connecting bolt. The positioning ring is tapered near the inner edge of the connecting bolt. Two movable rings distributed vertically are fitted inside the clearance cavity. The movable ring consists of an inner ring, an outer ring, and a ring located between the inner ring and the outer ring. The outer ring is composed of balls, and the diameter of the balls is slightly larger than the height of the movable ring. A sliding sleeve is movably fitted inside the movable cavity, and there is a gap between the outer wall of the sliding sleeve and the inner wall of the movable cavity. A step is integrally formed on the outer wall of the sliding sleeve, and the step is located between the two movable rings. A floating pressure head is slidably fitted on the inner wall of the sliding sleeve. A protrusion is fixedly connected to the end of the floating pressure head away from the connecting bolt. A limiting cavity is opened on the side of the floating pressure head near the connecting bolt. A second spring abuts against the inner wall of the limiting cavity and the side opposite to the movable cavity.

[0010] More preferably, the press-fit component includes an inner press head fixedly connected to the bottom of the protrusion, and there is a movable gap between the outer diameter of the inner press head and the inner diameter of the outer press head, and there is also a movable gap between the inner press head and the positioning ring, and the bottom of the inner press head is fixedly connected to an expansion pin for fitting a bushing.

[0011] More preferably, a limiting ring is integrally formed on the inner wall of the bushing near the top, and the limiting ring is used to restrict the assembly position of the bushing.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the horizontal compensation component in the pressure assembly part can compensate for the position of the assembly sleeve and the bushing even if they are not on the same vertical line during the assembly process by moving the floating pressure head horizontally. This avoids the situation where the bushing and the assembly sleeve are not on the same vertical line, which affects the accurate assembly.

[0013] In this invention, the predetermined core allows for pre-positioning before pressing, thereby ensuring that the bushing can be effectively pressed into the assembly sleeve during the subsequent pressing process. At the same time, the predetermined core also serves as a detection function to prevent situations where pressing is impossible or the bushing is damaged during the pressing process due to large positional deviations. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the pressure assembly machine structure of the present invention; Figure 3 This is a schematic diagram of the predetermined core cross-sectional structure of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic cross-sectional view of the pressure assembly machine of the present invention; Figure 6 This is a partial enlarged cross-sectional structural diagram of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point C; Figure 8 This is a schematic diagram of the bushing and assembly sleeve press-fit structure of the present invention; Figure 9 This is a partially enlarged schematic diagram of the present invention.

[0015] In the diagram: 1. Base; 2. Bracket; 3. First slide rail; 4. First cylinder; 5. Second cylinder; 7. Compensating pressure head; 8. Inner pressure head; 9. Outer pressure head; 21. Lifting frame; 22. Push rod motor; 23. Housing; 24. Limiting sleeve; 25. Contact pad; 26. Fixing ring; 27. Lifting rod; 28. Elastic pad; 29. ​​First spring; 31. Lifting platform; 33. Electronic press; 41. Connecting rod; 42. Connecting bolt; 43. Protective cover; 44. Guide sleeve; 45. Connecting seat; 51. Limiting plate; 52. Second slide rail; 53. Clearance groove; 71. Positioning ring; 72. Sliding sleeve; 73. Second spring; 74. Floating pressure head; 75. Step; 76. Movable ring; 81. Expansion pin; 91. Assembly sleeve. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-9 This invention provides a technical solution: a battery box housing sleeve double-sided bushing pressure assembly device, including a pressure assembly machine. One side of the pressure assembly machine is equipped with a robotic arm for gripping the battery box. The end effector of the robotic arm clamps and fixes the battery box via a fixture. Multiple vertically penetrating assembly sleeves 91 are provided on both sides of the battery box. The pressure assembly machine consists of a support assembly and two bushing pressing assemblies, located at the top and bottom of the battery box respectively, and symmetrically distributed vertically. Each bushing pressing assembly comprises a driving part, a pressure assembly part, and a pressure-bearing part. The pressure-bearing part includes a second cylinder 5 and a first cylinder 4. The output ends of the second cylinder 5 and the first cylinder 4 are fixedly connected to a connecting rod 41. The end of the connecting rod 41 on the output end of the second cylinder 5 is engaged with a laterally movable limiting plate 51. The limiting plate 51 has a relief groove 53 on the side away from the second cylinder 5, and the relief groove 53 is used to avoid the connecting rod 41 on the first cylinder 4. The limiting plate 51 in each bushing pressing assembly can be used to limit the position of the output end of the first cylinder 4 in the bushing pressing assembly and bear the driving pressure of the driving part during the assembly process of the assembly part. The robotic arm is programmed and controlled by a PLC control system to load and unload materials and move the battery box. The connecting rod 41 on the output end of the second cylinder 5 can push and pull the limiting plate 51 axially. A slot is provided on one side of the limiting plate 51 to slide and adapt to the connecting rod 41. The disc-shaped protrusion at the end of the connecting rod 41 away from the second cylinder 5 slides and adapts to the slot, forming a snap-fit, so that the connecting rod 41 can drive the limiting plate 51 to move axially. The connecting rod 41 can be snapped onto the limiting plate 51 when it moves up and down, which is convenient for assembly. The two bushing pressing assemblies are divided into an upper bushing pressing assembly and a lower bushing pressing assembly according to their positional relationship.

[0018] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the support assembly consists of a predetermined core and a lifting and sliding part. The predetermined core includes a lifting frame 21 located between the robotic arm and the pressure assembly machine, and a base 1 located at the bottom of the pressure assembly machine. A push rod motor 22 is fixedly connected to the top of the lifting frame 21, and a housing 23 is fixedly connected to the output end of the push rod motor 22. A limit sleeve 24 is fixedly connected to the bottom inner wall of the housing 23, and a contact pad 25 is fixedly sleeved on the outer wall of the limit sleeve 24, with the bottom of the contact pad 25 abutting against the bottom inner wall of the housing 23. The limiting sleeve 24 is internally connected to a first spring 29, and the bottom of the first spring 29 abuts against the bottom inner wall of the housing 23. The housing 23 is internally connected to a fixing ring 26 that slides up and down. The top of the fixing ring 26 is fixedly connected to a lifting rod 27. The bottom of the lifting rod 27 is provided with a groove for limiting the first spring 29, and the top of the first spring 29 abuts against the top inner wall of the groove. The bottom of the fixing ring 26 is fixedly connected to an elastic electric sheet 28, and the elastic electric sheet 28 is electrically connected to the contact electric sheet 25. The battery box is equipped with matching sleeves 91 symmetrically distributed on both sides: The bracket 2 has a C-shaped structure, with two bushing press-fit assemblies located at the top and bottom of the opening side of the bracket 2, respectively; The top of the lifting rod 27 is fixedly connected to a stop. The housing 23, the limiting sleeve 24, and the lifting rod 27 are all insulators. The contact pad 25 is electrically connected to the elastic pad 28 and is used to transmit electrical signals to the robotic arm and the push rod motor 22. Before assembly, the position of the battery box is adjusted by the PLC-controlled robotic arm so that the assembly sleeve 91 on one side of the battery box is aligned with the pressing position of the pressure assembly machine. Since the assembly sleeves 91 on both sides of the battery box are symmetrically distributed, the assembly sleeve 91 on the other side of the battery box is aligned with the abutment. Before pressing, the push rod motor 22 is started first, and then the butt and the housing 23 extend upward with the output end of the push rod motor 22; When the abutment and the mounting sleeve 91 are on the same vertical line, the abutment will enter the mounting sleeve 91. At this time, it can be determined that the mounting sleeve 91 on the other side of the battery box corresponds to the pressing position of the pressure assembly machine. When the pusher head and the mounting sleeve 91 are not on the same vertical line, as the pusher head rises, it will abut against the bottom of the battery box. As the pusher motor 22 continues to rise, the lifting rod 27 overcomes the force of the first spring 29, causing the lifting rod 27 to retract into the housing 23 until the contact pad 25 contacts the elastic pad 28. This terminates the operation of the pusher motor 22 through an electrical signal and resets it. The audible and visual alarm device on the robotic arm will sound an alarm, and then personnel will perform position calibration.

[0019] In this embodiment, as Figure 2 , Figure 5 and Figure 6 As shown, the lifting and sliding part includes two first slide rails 3 that are symmetrically distributed vertically, and both first slide rails 3 are fixedly connected to the inner wall of one side of the opening of the bracket 2. Lifting platforms 31 are slidably adapted on both first slide rails 3. The two lifting platforms 31 are symmetrically distributed vertically. A second cylinder 5 is fixedly connected to the inner corner of the lifting platform 31. Two first cylinders 4 are respectively fixedly connected to the opposite side of the two lifting platforms 31. A second slide rail 52 that is slidably adapted to the limiting plate 51 is fixedly connected to the opposite side of the two lifting platforms 31. The second slide rail 52 not only guides the movement of the limiting plate 51, but also prevents the limiting plate 51 from shifting upward or downward. The lifting platform 31 is L-shaped and can slide up and down as driven by the drive unit.

[0020] In this embodiment, as Figure 1 , Figure 2 and Figure 6 As shown, the drive unit includes two electronic presses 33 that are fixedly connected to the top and bottom sides of the bracket 2 respectively. The output end of the electronic press 33 moves through the bracket 2. The output end of the electronic press 33 is connected to the lifting platform 31 through a coupling. The output end of the electronic press 33 passes through the bracket 2 and is fixedly connected to a connecting seat 45. The side of the connecting seat 45 away from the electronic press 33 is fixedly connected to the lifting platform 31. The extension or retraction of the output end of the electronic press 33 can drive the lifting platform 31 and the connecting seat 45 to move up and down. When the output end of the electronic press 33 extends, the pressure assembly part moves toward the battery box to assemble the bushing.

[0021] In this embodiment, as Figure 5 , Figure 6 and Figure 7As shown, the pressure assembly part includes an internal pressure head assembly unit and a pressure transmission unit. The pressure transmission unit includes a cover 43 that is fixedly connected to one side of the two lifting platforms 31 respectively. A guide sleeve 44 is fixedly connected to the side of the cover 43 away from the lifting platform 31. An external pressure head 9 is fixedly connected to the side of the guide sleeve 44 away from the lifting platform 31. A connecting bolt 42 is slidably connected up and down inside the cover 43 and the guide sleeve 44. The end of the connecting bolt 42 near the lifting platform 31 is engaged with the end of the connecting rod 41 on the output end of the first cylinder 4. The connecting rod 41 on the output end of the connecting bolt 42 and the first cylinder 4 are connected in the same way as the connecting rod 41 on the second cylinder 5 and the limiting plate 51. Both connecting rods 41 are connected to the connecting bolt 42 and the limiting plate 51 respectively by sliding snap-fit ​​for easy assembly, which ensures the transmission of axial force while ensuring easy assembly.

[0022] In this embodiment, as Figure 6 , Figure 7 and Figure 8 As shown, the internal pressure head assembly unit consists of a horizontal compensation component and a pressing component. The horizontal compensation component includes a compensation pressure head 7 fixedly connected to the end of the connecting bolt 42 away from the lifting platform 31. A movable cavity is formed on the side of the compensation pressure head 7 away from the connecting bolt 42. A clearance cavity is formed on the inner edge of the movable cavity. A positioning ring 71 is fixedly connected to the side of the compensation pressure head 7 away from the connecting bolt 42. The positioning ring 71 is tapered near the inner edge of the connecting bolt 42. Two movable rings 76 distributed vertically are sleeved in the clearance cavity. The movable rings 76 consist of an inner ring, an outer ring, and balls located on the inner and outer rings. The diameter of the ball is slightly larger than the height of the movable ring 76. A sliding sleeve 72 is movably sleeved in the movable cavity, and there is a gap between the outer wall of the sliding sleeve 72 and the inner wall of the movable cavity. A step 75 is integrally formed on the outer wall of the sliding sleeve 72, and the step 75 is located between the two movable rings 76. A floating pressure head 74 is slidably adapted on the inner wall of the sliding sleeve 72. A protrusion is fixedly connected to the end of the floating pressure head 74 away from the connecting bolt 42. A limiting cavity is opened on the side of the floating pressure head 74 near the connecting bolt 42. A second spring 73 abuts between the inner wall of the limiting cavity and the side opposite to the movable cavity. The positioning ring 71 blocks the lower end of the clearance cavity, so that the clearance cavity and the positioning ring 71 form an annular groove. The step 75 and the two movable rings 76 are all installed in the annular groove. The outer diameter of the step 75 is slightly smaller than the inner diameter of the clearance cavity, so that the sliding sleeve 72 can move horizontally in conjunction with the movable ball. There is a gap between the outer wall of the protrusion and the inner wall of the positioning ring 71. The floating pressure head 74 and the outer wall of the protrusion are connected by a conical surface, and the conical surface is adapted to the conical surface of the inner edge of the positioning ring 71. The conical surface on the positioning ring 71 and the conical surface on the pressure head of the floating pressure head 74 are pressed together by the elastic force of the second spring 73, so that the protrusion at the bottom of the floating pressure head 74 passes through the positioning ring 71 to achieve center positioning.

[0023] In this embodiment, as Figure 2 , Figure 7 and Figure 8 As shown, the press-fitting component includes an inner press head 8 fixedly connected to the bottom of the protrusion, and there is a movable gap between the outer diameter of the inner press head 8 and the inner diameter of the outer press head 9. There is also a movable gap between the inner press head 8 and the positioning ring 71. The bottom of the inner press head 8 is fixedly connected to an expansion pin 81 for fitting a bushing. The bushing is pre-installed onto the tension pin 81, and the bushing is fixed from the inside out by the pre-tightening force of the tension pin 81.

[0024] In this embodiment, as Figure 8 As shown, a limiting ring is integrally formed on the inner wall of the bushing 91 near the top. The limiting ring is used to restrict the assembly position of the bushing.

[0025] The method of use and advantages of the present invention: The battery box housing sleeve double-sided bushing pressure assembly device operates as follows during use: First, the device is reset, and a bushing is pre-installed on the expansion pin 81 in the lower bushing press assembly. Then, the robotic arm grabs the battery box and aligns the assembly sleeve 91 on the battery box with the expansion pin 81. Before pressing, pre-centering is performed, and the push rod motor 22, housing 23 and lifting rod 27 extend upward to ensure that the butt head enters the assembly sleeve 91; The first cylinder 4 in the lower bushing pressing assembly is activated, causing the expansion pin 81 to extend from the outer pressure head 9 from bottom to top. Then, the second cylinder 5 is activated, and the output end of the second cylinder 5 extends out, causing the limiting plate 51 to move between the connecting bolt 42 and the lifting platform 31. The clearance groove 53 is locked on the outer side of the connecting rod 41 at the end of the first cylinder 4 to form a limit. At this time, the end of the connecting bolt 42 near the first cylinder 4 is in contact with the limiting plate 51. The limiting plate 51 restricts the connecting bolt 42, so that the connecting bolt 42 is blocked by the limiting plate 51 when it is under force, thereby ensuring the transmission of reaction force during the pressing process. Then, the electronic press 33 in the upper bushing pressing assembly is started. At this time, the output ends of the first cylinder 4 and the second cylinder 5 in the upper bushing pressing assembly have not extended out, that is, the bushing is located inside the outer pressure head 9. As the output end of the electronic press 33 in the upper bushing pressing assembly extends downward, the outer pressure head 9 in the upper bushing pressing assembly abuts against the top of the mounting sleeve 91 and maintains pressure. Then, the electronic press 33 in the lower bushing pressing assembly is started again, so that the lower bushing abuts against the limiting ring of the mounting sleeve 91 from bottom to top. Then, the two bushing pressing assemblies are reset. After the reset is completed, the bushing is pre-installed on the expansion pin 81 of the upper bushing pressing assembly. Then, the first cylinder 4 and the second cylinder 5 of the upper bushing pressing assembly are started in sequence. At this time, the expansion pin 81 and the bushing in the upper bushing pressing assembly extend out from the outer pressure head 9. Then, the electronic press 33 on the upper bushing pressing assembly is started, so that the upper expansion pin 81 and the bushing move towards the mounting sleeve 91. After the expansion pin 81, with the bushing, is pressed into the top of the mounting sleeve 91, the lower electronic press 33 is started. At this time, the lower expansion pin 81 is located in the outer pressure head 9. As the output end of the lower electronic press 33 extends, the lower outer pressure head 9 will abut against the bottom of the mounting sleeve 91, so that the bushing on the upper expansion pin 81 is pressed into the mounting sleeve 91, completing the pressing. Then, the two bushing pressing assemblies are reset again, and the above steps are repeated to complete the bushing pressing of multiple mounting sleeves 91 on the battery box.

Claims

1. A battery case sleeve double-sided bushing press-fitting device, characterized by, The system includes a pressure assembly machine, on one side of which is a robotic arm for gripping the battery box. The end effector of the robotic arm grips and fixes the battery box using a clamp. Multiple through-hole assembly sleeves (91) are provided on both sides of the battery box. The pressure assembly machine consists of a support assembly and two bushing pressing assemblies, located at the top and bottom of the battery box respectively. The two bushing pressing assemblies are symmetrically distributed vertically. Each bushing pressing assembly consists of a drive unit, a pressure assembly unit, and a pressure-bearing unit. The pressure-bearing unit includes a second cylinder (5) and a first cylinder (4). The output ends of the second cylinder (5) and the first cylinder (4) are both fixedly connected to a connecting rod (41). The end of the connecting rod (41) on the output end of the second cylinder (5) is engaged with a laterally movable limiting plate (51). The limiting plate (51) has a relief groove (53) on the side away from the second cylinder (5), and the relief groove (53) is used to avoid the connecting rod (41) on the first cylinder (4). The limiting plate (51) in each bushing press assembly can be used to limit the position of the output end of the first cylinder (4) in the bushing press assembly and bear the force of the driving pressure assembly during the assembly process.

2. The battery box can sleeve double-sided bushing pressure assembly device according to claim 1, characterized in that: The support assembly consists of a predetermined core and a lifting sliding part. The predetermined core includes a lifting frame (21) located between the robotic arm and the pressure assembly machine and a base (1) located at the bottom of the pressure assembly machine. A push rod motor (22) is fixedly connected to the top of the lifting frame (21). A housing (23) is fixedly connected to the output end of the push rod motor (22). A limit sleeve (24) is fixedly connected to the bottom inner wall of the housing (23). A contact pad (25) is fixedly sleeved on the outer wall of the limit sleeve (24), and the bottom of the contact pad (25) abuts against the bottom inner wall of the housing (23). The sleeve (24) is internally connected to a first spring (29), and the bottom of the first spring (29) abuts against the bottom inner wall of the housing (23). The housing (23) is internally connected to a fixed ring (26) that slides up and down. The top of the fixed ring (26) is fixedly connected to a lifting rod (27). The bottom of the lifting rod (27) is provided with a groove for limiting the first spring (29), and the top of the first spring (29) abuts against the top inner wall of the groove. The bottom of the fixed ring (26) is fixedly connected to an elastic electric sheet (28), and the elastic electric sheet (28) is electrically connected to a contact electric sheet (25).

3. The battery box can sleeve double-sided bushing press-fitting device according to claim 2, characterized in that: The lifting and sliding part includes two first slide rails (3) symmetrically distributed vertically, and both first slide rails (3) are fixedly connected to the inner wall of one side of the opening of the bracket (2). Lifting platforms (31) are slidably adapted on both first slide rails (3). The two lifting platforms (31) are symmetrically distributed vertically. The second cylinder (5) is fixedly connected to the inner corner of the lifting platform (31). The two first cylinders (4) are respectively fixedly connected to the opposite side of the two lifting platforms (31). The opposite side of the two lifting platforms (31) is fixedly connected to a second slide rail (52) that is slidably adapted to the limiting plate (51).

4. The battery box and can sleeve double-sided bushing press-fitting apparatus according to claim 2, characterized by: The drive unit includes two electronic presses (33) fixedly connected to the top and bottom sides of the bracket (2), and the output end of the electronic press (33) moves through the bracket (2). The output end of the electronic press (33) is connected to the lifting platform (31) through a coupling. The output end of the electronic press (33) passes through the bracket (2) and is fixedly connected to a connecting seat (45). The side of the connecting seat (45) away from the electronic press (33) is fixedly connected to the lifting platform (31).

5. The battery box and case sleeve double-sided bushing press-fitting device according to claim 3, characterized in that: The pressure assembly unit includes an internal pressure head assembly unit and a pressure transmission unit. The pressure transmission unit includes a cover (43) fixedly connected to one side of each of the two lifting platforms (31). A guide sleeve (44) is fixedly connected to the side of the cover (43) away from the lifting platform (31). An external pressure head (9) is fixedly connected to the side of the guide sleeve (44) away from the lifting platform (31). A connecting bolt (42) is slidably connected up and down inside the cover (43) and the guide sleeve (44). The end of the connecting bolt (42) near the lifting platform (31) is engaged with the end of the connecting rod (41) on the output end of the first cylinder (4).

6. The battery box and can sleeve double-sided bushing press-fitting apparatus according to claim 5, characterized by: The internal pressure head assembly unit consists of a horizontal compensation component and a pressing component. The horizontal compensation component includes a compensation pressure head (7) fixedly connected to the end of the connecting bolt (42) away from the lifting platform (31). A movable cavity is provided on the side of the compensation pressure head (7) away from the connecting bolt (42). A clearance cavity is provided on the inner edge of the movable cavity. A positioning ring (71) is fixedly connected to the side of the compensation pressure head (7) away from the connecting bolt (42). The positioning ring (71) is tapered near the inner edge of the connecting bolt (42). Two movable rings (76) distributed vertically are sleeved in the clearance cavity. The movable rings (76) consist of an inner ring, an outer ring, and balls located on the inner and outer rings. The diameter of the ball is slightly larger than the height of the movable ring (76). A sliding sleeve (72) is movably fitted inside the movable cavity, and there is a gap between the outer wall of the sliding sleeve (72) and the inner wall of the movable cavity. A step (75) is integrally formed on the outer wall of the sliding sleeve (72), and the step (75) is located between the two movable rings (76). A floating pressure head (74) is slidably fitted on the inner wall of the sliding sleeve (72). A protrusion is fixedly connected to the end of the floating pressure head (74) away from the connecting bolt (42). A limiting cavity is opened on the side of the floating pressure head (74) near the connecting bolt (42). A second spring (73) abuts between the inner wall of the limiting cavity and the side opposite to the movable cavity.

7. The battery box and can sleeve double-sided bushing press-fitting apparatus according to claim 5, characterized by: The press-fitting component includes an inner press head (8) fixedly connected to the bottom of the protrusion, and there is a movable gap between the outer diameter of the inner press head (8) and the inner diameter of the outer press head (9). There is also a movable gap between the inner press head (8) and the positioning ring (71). The bottom of the inner press head (8) is fixedly connected to an expansion pin (81) for fitting a bushing.

8. The battery box and can sleeve double-sided bushing press-fitting apparatus according to claim 1, characterized by: The inner wall of the bushing (91) is integrally formed with a limiting ring near the top, which is used to limit the assembly position of the bushing.

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