Press fitting device for an electric actuator

Abstract

The utility model discloses a kind of press fitting device of electric actuator, it is related to assembly technical field, and press fitting device includes the drive mechanism, first tray and second tray respectively arranged in rack top portion;Drive mechanism extends along first horizontal direction, and its one end below is equipped with first tray, and its other end below is equipped with second tray;The drive end of drive mechanism is connected with clamping mechanism, abutting mechanism and poking mechanism respectively by mounting bracket;Abutting mechanism includes connecting frame and locking module;Connecting frame is slidably installed on mounting bracket vertically, and the both sides are abutted with elastic member;The lower end of connecting frame is suitable for when clamping mechanism clamps upper shell assembly, and the top surface of upper shell assembly is abutted;Locking module is suitable for controlling connecting frame to be rigid or elastic;Poking mechanism is suitable for poking eccentric rod on upper shell assembly.The utility model can press fit upper shell assembly on lower shell assembly by the cooperation between each mechanism, reduce assembly difficulty, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of assembly technology, specifically to a press-fitting device for an electric actuator. Background Technology

[0002] Electric actuators are used to convert their own energy into mechanical motion, and their final output is rotary mechanical motion.

[0003] Chinese Patent CN209638493U discloses an electric actuator with a surface-mount tactile switch. This electric actuator includes a gear reduction assembly comprising meshing sector gears and double-layer gears. Therefore, incorporating sector gears and double-layer gears within an electric actuator is prior art.

[0004] Currently, there are electric actuators on the market that include sector gears and double-layer gears. For details, please refer to [link / reference]. Figure 1 As shown, the electric actuator includes an upper housing 811, a sector gear 812, an upper gear 813, a connecting rod 814, an eccentric rod 815, a lower gear 822, a lower housing 821, and a motor installed in the lower housing 821.

[0005] The upper housing 811, sector gear 812, upper gear 813, connecting rod 814, and eccentric rod 815 constitute the upper housing assembly 81. Specifically, sector gear 812 is disposed inside the upper housing 811. The upper end of the sector gear 812's rotating shaft is rotatably connected to the upper housing 811 and extends outside the upper housing 811, connecting to the connecting rod 814. The connecting rod 814 is provided with an eccentric rod 815. The upper gear 813 is a double-layer gear, including a large gear in the upper layer and a small gear in the lower layer. The large gear of the upper gear 813 is positioned between the sector gear 812 and the upper housing 811. The small gear of the upper gear 813 meshes with the sector gear 812.

[0006] The lower gear 822, the lower housing 821, and the motor constitute the lower housing assembly 82. Specifically, the lower gear 822 is rotatably disposed within the lower housing 821, and the motor is adapted to drive the lower gear 822 to rotate.

[0007] The assembly steps of the electric actuator are as follows: first, assemble the upper housing assembly 81 and the lower housing assembly 82 separately; then, press the upper housing assembly 81 and the lower housing assembly 82 together so that the pinion of the upper gear 813 meshes with the lower gear 822, and the upper housing 811 and the lower housing 821 are interlocked. During the pressing process of the upper housing assembly 81 and the lower housing assembly 82, the upper gear 813 in the upper housing assembly 81 and the lower gear 822 in the lower housing assembly 82 are difficult to mesh, resulting in high assembly difficulty and low working efficiency.

[0008] Furthermore, during the transfer of the upper shell assembly 81 to directly above the lower shell assembly 82, the upper shell 811, sector gear 812, and connecting rod 814 are connected together via the pivot of sector gear 812, and can be considered as a single unit, preventing accidental separation. The large gear of the upper gear 813 is positioned between the upper shell 811 and sector gear 812, while the small gear of the upper gear 813 meshes with sector gear 812. Therefore, during the transfer of the upper shell assembly 81, there is a risk that the upper gear 813 may detach from the upper shell 811, making the transfer of the upper shell assembly 81 more difficult. Utility Model Content

[0009] This utility model proposes a press-fitting device for an electric actuator to solve the problems of difficulty in meshing between the upper gear in the upper housing assembly and the lower gear in the lower housing assembly, high assembly difficulty, and low working efficiency.

[0010] The present invention discloses a pressing device for an electric actuator, comprising a drive mechanism, a first tray, and a second tray respectively disposed on the top of a frame; The drive mechanism extends along a first horizontal direction, with the first tray located below one end and the second tray located below the other end; the drive end of the drive mechanism is connected to the clamping mechanism, the abutting mechanism, and the actuating mechanism respectively via a mounting bracket. The clamping mechanism is located at the bottom of the mounting frame, with its lower end being the clamping end; The abutment mechanism includes a connecting frame and a locking module; the connecting frame is vertically and slidably mounted on the mounting frame, and an elastic element abuts between the two; the lower end of the connecting frame is a free end, located below the mounting frame, and the free end is adapted to abut against the top surface of the upper shell assembly when the clamping mechanism clamps the upper shell assembly; the locking module is disposed between the mounting frame and the connecting frame, and is adapted to control the connecting frame to be rigid or elastic; The actuating mechanism is vertically arranged; the upper end of the actuating mechanism is a fixed end, which is disposed on the mounting bracket; the lower end of the actuating mechanism is a driving end, which extends to the bottom of the connecting bracket. The control mechanism mounted on the frame is adapted to drive the clamping mechanism via the drive mechanism to transfer the upper shell assembly placed on the first tray to directly above the lower shell assembly placed on the second tray. When the connecting frame is elastic, the control mechanism is adapted to control the actuating mechanism to actuate the eccentric rod on the upper shell assembly, so that the gear in the upper shell assembly meshes with the gear in the lower shell assembly. The control mechanism is also adapted to control the connecting frame to become rigid after the gears in the upper and lower shell assemblies are engaged, and to drive the connecting frame downwards via the drive mechanism, so that the upper shell assembly is pressed onto the lower shell assembly. Through the cooperation of the drive mechanism, clamping mechanism, abutment mechanism, and actuating mechanism, the upper shell assembly can be pressed onto the lower shell assembly, effectively reducing the time and cost of manual operation, improving work efficiency, and reducing assembly difficulty.

[0011] Optionally, the connecting frame includes a connecting top plate, a connecting column, and a connecting bottom plate arranged sequentially from top to bottom; The top connecting plate is positioned above the mounting bracket; the bottom connecting plate is positioned below the mounting bracket. The connecting column is vertically arranged, with its upper end fixedly connected to the connecting top plate, and its lower end vertically and slidably passing through the mounting frame and connected to the connecting bottom plate; the elastic element is sleeved on the connecting column, and both ends of the elastic element abut against the mounting frame and the connecting bottom plate respectively. The bottom of the connecting base plate is provided with an abutment rod for abutting against the top surface of the upper shell assembly and a vacuum suction cup for adsorbing the top surface of the upper shell assembly; The locking module is vertically arranged and positioned above the mounting bracket; the upper end of the locking module is a fixed end, which is mounted on the mounting bracket via a support frame; the lower end of the locking module is a driving end, positioned above the connecting top plate. The driving end of the locking module is adapted to be spaced apart from the top of the connecting top plate to make the connecting frame elastic; the driving end of the locking module is adapted to drive the connecting top plate to abut against the mounting frame to make the connecting frame rigid. Using the above solution, the connection frame can be made rigid or elastic through the cooperation between the connecting frame and the locking module.

[0012] Optionally, the bottom of the connecting base plate is provided with a plurality of abutment rods at intervals; the plurality of abutment rods are adapted to be distributed relative to the axial center hole of the upper gear on the upper shell assembly, the positioning post on the edge of the inner cavity of the upper shell, and the mounting hole of the lower gear in the inner cavity of the upper shell when the clamping mechanism clamps the upper shell assembly; The bottom of the connecting base plate is also vertically provided with an anti-rotation stop edge, which is adapted to be positioned above the lower edge protrusion of the upper shell assembly when the clamping mechanism clamps the upper shell assembly.

[0013] Optionally, the abutment mechanism further includes a displacement sensor; The displacement sensor is mounted on the mounting bracket; The connecting base plate is provided with a mating block that cooperates with the displacement sensor; The displacement sensor is adapted to detect the relative displacement between the mounting bracket and the connecting base plate; the control mechanism is adapted to determine whether the gear in the upper shell assembly and the gear in the lower shell assembly are meshed based on the information fed back by the displacement sensor.

[0014] Optionally, the drive mechanism includes a gantry, a first drive module, and a second drive module; The gantry frame is disposed on top of the frame; the top crossbeam of the gantry frame extends along the first horizontal direction; the first tray is located at one end of the top crossbeam, and the second tray is located at the other end of the top crossbeam; The first drive module extends along the first horizontal direction, its fixed end is disposed on the top crossbeam, and its drive end is connected to the fixed end of the second drive module through a slide table; the first drive module is adapted to drive the second drive module to move along the first horizontal direction. The second drive module is vertically arranged; the upper end of the second drive module is a fixed end, which is connected to the slide table; the lower end of the second drive module is a drive end, which is connected to the mounting frame; the second drive module is adapted to drive the mounting frame to move up and down.

[0015] Optionally, the clamping mechanism includes a pneumatic finger, a first clamping block, and a second clamping block; The fixed end of the pneumatic finger is connected to the mounting bracket, and the driving end of the pneumatic finger is provided with two grippers facing each other. There are two first clamping blocks, which are disposed on the inner side of the corresponding gripper; the lower end of the first clamping block is provided with a clamping slot, which is suitable for cooperating with the lower edge protrusion of the upper shell assembly; Two second clamping blocks are disposed on the outer sides of the corresponding grippers. Each second clamping block is vertically positioned, with a horizontal limiting portion at its lower end. The upper part of the horizontal limiting portion has a mating notch for accommodating the upper gear, and the sidewall of the mating notch is adapted to abut against the outer periphery of the upper gear. The lower part of the horizontal limiting portion is adapted to vertically limit the upper gear on the upper shell assembly when the first clamping block clamps the lower edge protrusion of the upper shell assembly. Using this scheme, the upper shell assembly can be effectively clamped through the cooperation of the first and second clamping blocks.

[0016] Optionally, the connecting base plate of the connecting frame is placed below the fixed end of the pneumatic finger and between the two grippers; The pneumatic finger has two grippers each equipped with an adjusting bolt, and the adjusting bolts are set horizontally. The outer wall of the connecting base plate is adapted to slide into the end of the adjusting bolt. This design ensures that the connecting frame can be raised and lowered smoothly.

[0017] Optionally, the toggle mechanism includes a toggle drive module, a drive gear, a driven gear, and a lever; The toggle drive module is positioned above the mounting bracket, and the fixed end of the toggle drive module is mounted on the mounting bracket via a support frame. The drive gear is disposed on the drive end of the toggle drive module and is positioned between the support frame and the mounting frame; The driven gear is rotatably mounted on the mounting bracket via a bearing housing and meshes with the driving gear; The upper end of the lever is connected to the shaft of the driven gear, and the lower end of the lever passes through the mounting bracket and extends to the bottom of the connecting bracket; The bottom of the lever is provided with a lever block, and the notch on the lever block is suitable for engaging with the eccentric rod. This design allows the gears in the upper housing assembly to mesh smoothly with the gears in the lower housing assembly, reducing assembly difficulty.

[0018] Optionally, the lever includes an upper lever and a lower lever; The upper end of the upper rod is connected to the shaft of the driven gear; the lower end of the upper rod passes through the mounting bracket and extends to the connecting base plate between the mounting bracket and the connecting bracket; the bottom of the upper rod is provided with a plug-in block; The lower rod is positioned below the upper rod and is rotatably mounted on the connecting base plate via a bearing seat. The top of the lower rod is provided with a plug-in slot that mates with the plug-in block. The lower end of the lower rod passes through the connecting base plate and extends below it. The lever is located at the bottom of the lower lever. With this design, the lever adopts a split structure, facilitating subsequent disassembly and maintenance.

[0019] Optionally, the top of the first tray is provided with a first receiving slot for receiving the upper shell assembly; The first receiving groove is provided with a C-shaped limiting block for limiting the sector gear; the first receiving groove is provided with a plug hole for inserting the sector gear shaft; a vertical support rod is provided in the first receiving groove, which is suitable for cooperating with the axial center hole of the upper gear. The top of the second tray is provided with a second receiving slot for accommodating the lower shell assembly.

[0020] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: The upper shell assembly can be press-fitted onto the lower shell assembly through the cooperation of the drive mechanism, clamping mechanism, abutting mechanism and pushing mechanism, which effectively reduces the time and cost of manual operation, improves work efficiency and reduces assembly difficulty. The engagement between the actuating mechanism and the connecting frame allows the gears in the upper housing assembly to mesh smoothly with the gears in the lower housing assembly, reducing assembly difficulty. The connection frame can be made rigid or flexible by the cooperation between the connecting frame and the locking module; The lever adopts a split structure, which facilitates disassembly and maintenance in the future.

[0021] The above description of the disclosed content and the following description of the embodiments are intended to demonstrate and explain the spirit and principle of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. Attached Figure Description

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is an exploded view of the electric actuator in this utility model; Figure 2 This is a top view of the press-fitting device in this utility model; Figure 3 This is a three-dimensional schematic diagram of a partial structure of the press-fitting device in this utility model; Figure 4 This is a schematic diagram of the first tray in this utility model; Figure 5 This is a schematic diagram of the upper shell assembly placed in the first tray in this utility model; Figure 6 This is a schematic diagram of the lower shell assembly placed in the second tray in this utility model; Figure 7 This is a cross-sectional schematic diagram (I) of a partial structure of the press-fitting device in this utility model; Figure 8 This is a cross-sectional schematic diagram (II) of a partial structure of the press-fitting device in this utility model; Figure 9 This is a schematic diagram of the clamping mechanism clamping the upper shell assembly in this utility model; Figure 10 This is a schematic diagram of the clamping mechanism in this utility model; Figure 11 This is a partial structural diagram of the connecting frame in this utility model; Figure 12 This is a partial schematic diagram of the actuating mechanism in this utility model; Figure 13 This is a schematic diagram of the upper shell assembly and the lower shell assembly in this utility model.

[0024] Explanation of icon numbers: 1. Rack; 2. Drive mechanism; 21. Gantry frame; 22. First drive module; 23. Second drive module; 24. Slide table; 25. Mounting bracket; 26. Support frame; 3. First tray; 31. First receiving slot; 32. C-shaped limiting block; 4. Second tray; 41. Second receiving slot; 5. Clamping mechanism; 51. Pneumatic finger; 511. Adjusting bolt; 52. First clamping block; 521. Clamping slot; 53. Second clamping block; 6. Abutment mechanism; 61. Connecting frame; 611. Connecting top plate; 612. Connecting column; 613. Connecting bottom plate; 614. Elastic element; 615. Vacuum suction cup; 616. Abutment rod; 617. Anti-rotation guard; 62. Locking module; 63. Displacement sensor; 64. Mating block; 7. Actuating mechanism; 71. Actuating drive module; 72. Driving gear; 73. Driven gear; 74. Lever; 741. Upper lever; 742. Lower lever; 75. Lever block; 81. Upper shell assembly; 811. Upper housing; 812. Sector gear; 813. Upper gear; 814. Connecting rod; 815. Eccentric rod; 82. Lower shell assembly; 821. Lower housing; 822. Lower gear. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0026] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the 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 the utility model.

[0027] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0028] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0029] Example 1 This application provides a press-fitting device for an electric actuator, used to press-fit an upper housing assembly 81 onto a lower housing assembly 82 to obtain a finished electric actuator.

[0030] In this embodiment, please refer to Figure 1 As shown, the upper housing assembly 81 includes an upper housing 811, a sector gear 812, and an upper gear 813. The upper housing 811 is a hollow cavity with an open lower end. The sector gear 812 is disposed within the upper housing 811, and its shaft is vertically oriented. The upper end of the sector gear 812's shaft extends outside the upper housing 811 and is connected to a connecting rod 814. The sector gear 812's shaft is connected to the upper housing 811 via a bearing. An eccentric rod 815 is provided on the side of the connecting rod 814 away from the sector gear 812's shaft. The upper gear 813 is disposed within the upper housing 811. The upper gear 813 is a double-layer gear, including a large gear and a small gear arranged sequentially from top to bottom. The large gear of the upper gear 813 is positioned between the sector gear 812 and the upper housing 811. The small gear of the upper gear 813 meshes with the sector gear 812. The inner edge of the upper housing 811 is provided with a positioning post, which is set vertically.

[0031] Please see Figure 1As shown, the lower housing assembly 82 includes a lower housing 821, a lower gear 822, and a motor. The lower housing 821 is a hollow cavity with an open top. The lower gear 822 is disposed within the lower housing 821 and is rotatably mounted within the lower housing 821 via a vertical shaft. The lower gear 822 is adapted to mesh with the larger gear of the upper gear 813. The motor is disposed within the lower housing assembly 82 and is adapted to drive the lower gear 822 to rotate.

[0032] The lower housing 821 has an inner cavity with a rotating shaft that mates with the axial center hole of the upper gear 813. The lower housing 821 also has an inner cavity with a mounting hole that mates with the lower end of the rotating shaft of the sector gear 812. The inner edge of the lower housing 821 has a positioning hole that mates with a positioning pin. The lower housing 821 and the upper housing 811 are adapted to be interlocked.

[0033] Please see Figures 2-3 As shown, the pressing device includes a frame 1, a drive mechanism 2, a first tray 3, a second tray 4, a clamping mechanism 5, an abutment mechanism 6, a toggle mechanism 7, and a control mechanism.

[0034] The drive mechanism 2, the first tray 3, and the second tray 4 are respectively disposed on the top of the frame 1. The drive mechanism 2 extends along a first horizontal direction. The first tray 3 is located below one end of the drive mechanism 2, and the second tray 4 is located below the other end of the drive mechanism 2. The first tray 3 is used to support the upper shell assembly 81. When the upper shell assembly 81 is placed on the first tray 3, the opening of the upper shell 811 of the upper shell assembly 81 faces downward. The second tray 4 is used to support the lower shell assembly 82. When the lower shell assembly 82 is placed on the second tray 4, the opening of the lower shell 821 of the lower shell assembly 82 faces upward.

[0035] The clamping mechanism 5, the abutting mechanism 6, and the actuating mechanism 7 are respectively mounted on the drive end of the drive mechanism 2 via the mounting bracket 25. The drive mechanism 2 is used to drive the mounting bracket 25 to move horizontally and vertically, so that the mounting bracket 25 drives the clamping mechanism 5, the abutting mechanism 6, and the actuating mechanism 7 to move.

[0036] For details, please refer to Figures 7-9As shown, the clamping mechanism 5 is located at the bottom of the mounting bracket 25, with its lower end being the clamping end. The clamping mechanism 5 is used to clamp the upper shell assembly 81. The abutment mechanism 6 includes a connecting frame 61 and a locking module 62. The connecting frame 61 is vertically and slidably mounted on the mounting bracket 25, and an elastic element 614 abuts between the two. The lower end of the connecting frame 61 is a free end, located below the mounting bracket 25. When the clamping mechanism 5 clamps the upper shell assembly 81, the free end of the connecting frame 61 is adapted to abut against the top surface of the upper shell assembly 81 (i.e., the top surface of the upper shell 811). The locking module 62 is disposed between the mounting bracket 25 and the connecting frame 61, and is adapted to control the connecting frame 61 to be rigid or elastic. The actuating mechanism 7 is vertically disposed. The upper end of the actuating mechanism 7 is a fixed end, disposed on the mounting bracket 25. The lower end of the actuating mechanism 7 is a driving end, and extends to the lower part of the connecting frame 61. When the clamping mechanism 5 clamps the upper shell assembly 81, the actuating mechanism 7 is adapted to drive the eccentric rod 815 on the upper shell assembly 81 to rotate. The rotating eccentric rod 815 indirectly drives the upper gear 813 to rotate through the connecting rod 814 and the sector gear 812.

[0037] The control mechanism is mounted on the frame 1. The control mechanism is electrically connected to the drive mechanism 2, clamping mechanism 5, abutment mechanism 6, and actuating mechanism 7. The control mechanism is adapted to clamp or release the upper shell assembly 81 via the clamping mechanism 5. The control mechanism is also adapted to drive the clamping mechanism 5 via the drive mechanism 2 to transfer the upper shell assembly 81, placed on the first tray 3, to a position directly above the lower shell assembly 82, placed on the second tray 4. When the upper shell assembly 81 is positioned above the lower shell assembly 82 and the connecting frame 61 is elastic, the control mechanism is adapted to control the actuating mechanism 7 to actuate the eccentric rod 815, causing the upper gear 813 in the upper shell assembly 81 to mesh with the lower gear 822 in the lower shell assembly 82. After the upper gear 813 and lower gear 822 are engaged, the control mechanism is adapted to control the connecting frame 61 to be rigid and to drive the connecting frame 61 downwards via the drive mechanism 2, so that the upper shell assembly 81 is press-fitted onto the lower shell assembly 82.

[0038] Please see Figure 4 and Figure 5 As shown, the lower end of the first tray 3 is provided with a locking block (not shown in the figure), which is suitable for detachable connection with the locking slot on the top of the frame 1. The top of the first tray 3 is provided with a first receiving groove 31 for receiving the upper shell assembly 81. In addition, the edge of the first receiving groove 31 is provided with a notch so that the clamping mechanism 5 can remove the upper shell assembly 81 from the first receiving groove 31.

[0039] In this embodiment, the first receiving groove 31 is provided with an insertion hole for the lower end of the sector gear 812 shaft to be inserted. A vertical support rod is provided in the first receiving groove 31, which is adapted to cooperate with the axial center hole of the upper gear 813. In order to prevent the sector gear 812 and the upper gear 813 from rotating in the first receiving groove 31, a C-shaped limiting block 32 is also provided in the first receiving groove 31 to limit the sector gear 812.

[0040] Please see Figure 6 As shown, the lower end of the second tray 4 is provided with a locking block (not shown in the figure), which is suitable for detachable connection with the locking slot on the top of the frame 1. The top of the second tray 4 is provided with a second receiving slot 41 for receiving the lower shell assembly 82.

[0041] Please see Figure 3 As shown, the drive mechanism 2 includes a gantry frame 21, a first drive module 22, and a second drive module 23. The gantry frame 21 is located on top of the frame 1. The top crossbeam of the gantry frame 21 extends along a first horizontal direction. The first tray 3 is located at one end of the top crossbeam, and the second tray 4 is located at the other end of the top crossbeam.

[0042] The first drive module 22 is a linear drive module. The first drive module 22 extends along a first horizontal direction. The fixed end of the first drive module 22 is mounted on the top crossbeam, and the drive end of the first drive module 22 is connected to the fixed end of the second drive module 23 via a slide table 24. The first drive module 22 is adapted to drive the second drive module 23 to move along the first horizontal direction. To ensure that the first drive module 22 can drive the second drive module 23 to move smoothly, a matching slide rail and slider are provided between the slide table 24 and the top crossbeam of the gantry frame 21.

[0043] The second drive module 23 is a linear drive module. The second drive module 23 is vertically arranged. The upper end of the second drive module 23 is a fixed end, connected to the slide table 24. The lower end of the second drive module 23 is a drive end, connected to the mounting frame 25. The second drive module 23 is suitable for driving the mounting frame 25 to move up and down. To ensure that the second drive module 23 can drive the mounting frame 25 to move smoothly, a matching slide rail and slider are provided between the mounting frame 25 and the slide table 24.

[0044] Please see Figures 7-10As shown, the clamping mechanism 5 includes a pneumatic finger 51, a first clamping block 52, and a second clamping block 53. The pneumatic finger 51 is disposed at the bottom of the mounting bracket 25. The fixed end of the pneumatic finger 51 is connected to the mounting bracket 25, and two grippers are provided opposite each other on the driving end of the pneumatic finger 51. The two grippers of the pneumatic finger 51 are adapted to open and close in the horizontal direction. There are two first clamping blocks 52, which are disposed on the inner side of the corresponding grippers. The lower end of the first clamping block 52 is provided with a clamping groove 521. The clamping groove 521 is adapted to cooperate with the lower edge protrusion of the upper shell assembly 81 (i.e., the lower edge protrusion of the upper shell 811). There are two second clamping blocks 53, which are disposed on the outer side of the corresponding grippers. The second clamping blocks 53 are vertically disposed, and their lower ends are provided with a horizontal limiting part. The upper part of the horizontal limiting part is provided with a mating notch for accommodating the upper gear 813. The sidewall of the mating notch is adapted to abut against the outer periphery of the upper gear 813. When the first clamping block 52 clamps the lower edge protrusion of the upper shell assembly 81, the lower part of the horizontal limiting part is adapted to limit the upper gear 813 on the upper shell assembly 81 in the vertical direction.

[0045] During the transfer of the upper housing assembly 81, the upper housing 811, the sector gear 812, and the connecting rod 814 are connected together via the rotating shaft of the sector gear 812, and can be considered as a whole, preventing accidental separation. The large gear of the upper gear 813 is positioned between the upper housing 811 and the sector gear 812, and the small gear of the upper gear 813 meshes with the sector gear 812. Therefore, during the transfer of the upper housing assembly 81, there is a risk that the upper gear 813 may detach from the upper housing 811. This application addresses this by providing a second clamping block 53 to limit the movement of the sector gear 812, thereby preventing the upper gear 813 from detaching from the upper housing 811 during the transfer of the upper housing assembly 81.

[0046] Please see Figures 7-9 As shown, the connecting frame 61 includes a connecting top plate 611, a connecting column 612, and a connecting bottom plate 613 arranged sequentially from top to bottom. The connecting top plate 611 is positioned above the mounting frame 25. The connecting bottom plate 613 is positioned below the mounting frame 25. The connecting column 612 is vertically arranged. The upper end of the connecting column 612 is fixedly connected to the connecting top plate 611. The lower end of the connecting column 612 slides vertically through the mounting frame 25 and is connected to the connecting bottom plate 613. An elastic element 614 is sleeved on the connecting column 612. Both ends of the elastic element 614 abut against the mounting frame 25 and the connecting bottom plate 613, respectively.

[0047] Please see Figure 11As shown, a contact rod 616 and a vacuum suction cup 615 are spaced apart at the bottom of the connecting base plate 613. The lower end of the contact rod 616 is adapted to abut against the top surface of the upper shell assembly 81 (i.e., the top surface of the upper shell 811). The vacuum suction cup 615 is adapted to adsorb the top surface of the upper shell assembly 81 (i.e., the top surface of the upper shell 811). The middle part of the vacuum suction cup 615 is connected to a vacuum pump. The vacuum pump is electrically connected to a control mechanism. The control mechanism is adapted to control the lower end of the vacuum suction cup 615 to adsorb or stop adsorbing the top surface of the upper shell 811 through the vacuum pump.

[0048] The locking module 62 is vertically positioned above the mounting bracket 25. In this embodiment, the locking module 62 is a linear drive module. The upper end of the locking module 62 is a fixed end, mounted on the mounting bracket 25 via a support bracket 26. The lower end of the locking module 62 is a drive end, positioned above the connecting top plate 611. The drive end of the locking module 62 is adapted to be spaced apart from the top of the connecting top plate 611, so that the connecting bracket 61 is elastic. The drive end of the locking module 62 is adapted to drive the connecting top plate 611 to abut against the mounting bracket 25, so that the connecting bracket 61 is rigid.

[0049] In this embodiment, there are two connecting top plates 611, four connecting columns 612, and one connecting bottom plate 613. There are two locking modules 62, each corresponding to one of the connecting top plates 611. Specifically, the four connecting columns 612 are distributed at the four corners of the connecting bottom plate 613. The two connecting top plates 611 are distributed opposite each other on both sides of the support frame 26, and each connecting top plate 611 is connected to its corresponding two connecting columns 612.

[0050] In this embodiment, to ensure smooth lifting and lowering of the connecting frame 61, the connecting base plate 613 is slidably engaged with the two grippers of the pneumatic finger 51. Specifically, the connecting base plate 613 is positioned below the fixed end of the pneumatic finger 51 and between the two grippers of the pneumatic finger 51. Adjusting bolts 511 are respectively provided on the two grippers of the pneumatic finger 51. The adjusting bolts 511 are horizontally positioned. The connecting base plate 613 is positioned between the two adjusting bolts 511, and the outer side walls on both sides of the connecting base plate 613 are adapted to slidably engage with the ends of the adjusting bolts 511.

[0051] In this embodiment, a plurality of abutment rods 616 are spaced apart at the bottom of the connecting base plate 613. When the clamping mechanism 5 clamps the lower edge protrusion of the upper shell assembly 81, the plurality of abutment rods 616 are adapted to be distributed relative to the axial center hole of the upper gear 813 on the upper shell assembly 81, the positioning post on the edge of the inner cavity of the upper shell 811, and the mounting hole of the lower gear in the inner cavity of the upper shell 811, respectively.

[0052] In addition, an anti-rotation guard 617 is vertically provided at the bottom of the connecting base plate 613. When the clamping mechanism 5 clamps the lower edge protrusion of the upper shell assembly 81, the anti-rotation guard 617 is positioned above the lower edge protrusion of the upper shell assembly 81. In this embodiment, there are two connecting base plates 613, distributed on both sides of the connecting base plate 613.

[0053] For further details, please refer to Figures 7-8 As shown, the abutment mechanism 6 also includes a displacement sensor 63. The displacement sensor 63 is mounted on the mounting bracket 25. A mating block 64 that cooperates with the displacement sensor 63 is provided on the connecting base plate 613. The displacement sensor 63 is adapted to detect the relative displacement between the mounting bracket 25 and the connecting base plate 613. The control mechanism is adapted to determine whether the upper gear 813 in the upper shell assembly 81 and the lower gear 822 in the lower shell assembly 82 are meshed based on the information fed back by the displacement sensor 63.

[0054] Please see Figure 8 and Figure 12 As shown, the actuating mechanism 7 includes an actuation drive module 71, a driving gear 72, a driven gear 73, and a lever 74. The actuation drive module 71 is a rotary drive module. The actuation drive module 71 is positioned above the mounting bracket 25. The upper end of the actuation drive module 71 is a fixed end, mounted on the mounting bracket 25 via a support bracket 26. The lower end of the actuation drive module 71 is a driving end. The driving gear 72 is mounted on the driving end of the actuation drive module 71 and is positioned between the support bracket 26 and the mounting bracket 25. The driven gear 73 is rotatably mounted on the mounting bracket 25 via a bearing seat and meshes with the driving gear 72. The upper end of the lever 74 is connected to the shaft of the driven gear 73. The lower end of the lever 74 passes through the mounting bracket 25 and extends below the connecting bracket 61. The bottom of the lever 74 is provided with a lever block 75, and the notch on the lever 75 is adapted to cooperate with the eccentric rod 815.

[0055] The control mechanism includes a controller and a control panel. Both the controller and control panel are existing technologies and will not be described in detail. The controller is electrically connected to the first drive module 22, the second drive module 23, the pneumatic finger 51, the air extraction device, the locking module 62, the displacement sensor 63, and the toggle drive module 71.

[0056] The working principle of this application is: Before operation, the operator detachably places the first tray 3, which carries the upper shell assembly 81, onto the corresponding slot on the top of the frame 1, and detachably places the second tray 4, which carries the lower shell assembly 82, onto the corresponding slot on the top of the frame 1. At this time, the connecting frame 61 is elastic, meaning that the locking module 62 and the connecting top plate 611 are spaced apart, and the connecting frame 61 can slide on the mounting frame 25; the two grippers of the pneumatic fingers 51 are in the open state.

[0057] The operator controls the drive mechanism 2 to move the mounting frame 25 through the control mechanism, so that the clamping mechanism 5, the abutment mechanism 6, and the actuating mechanism 7 are all moved to the top of the first tray 3. Then, the operator drives the mounting frame 25 to descend through the control mechanism, so that the lower end of the abutment rod 616 abuts against the top surface of the upper shell assembly 81 (i.e., the top surface of the upper shell 811), the suction end of the vacuum suction cup 615 abuts against the top surface of the upper shell assembly 81 (i.e., the top surface of the upper shell 811), the anti-rotation guard 617 is placed above both sides of the upper shell assembly 81, the eccentric rod 815 of the upper shell assembly 81 is placed in the notch of the actuating block 75, and the elastic element 614 is in a compressed state.

[0058] In this configuration, the C-shaped limiting block 32 can limit the sector gear 812, and the eccentric rod 815 is connected to the shaft of the sector gear 812 via the connecting rod 814. Specifically, the eccentric rod 815 is fixedly connected to the connecting rod 814, and the connecting rod 814 is welded to the shaft of the sector gear 812. Therefore, the C-shaped limiting block 32 can indirectly limit the eccentric rod 815 through the sector gear 812. That is, the placement angle and position of the eccentric rod 815 on the first tray 3 are fixed and uniform. Therefore, when the drive end of the toggle drive module 71 rotates back to its initial position, the notch of the toggle block 75 can smoothly engage with the eccentric rod 815 on the first tray 3.

[0059] Subsequently, the pneumatic fingers 51 are controlled by the control mechanism to clamp the upper shell assembly 81. Specifically, two first clamping blocks 52 clamp the lower edge protrusions on both sides of the upper shell assembly 81 (i.e., the lower edge protrusions on both sides of the upper shell 811); two second clamping blocks 53 limit the two sides of the upper gear 813. The lower part of the horizontal limiting part of the second clamping block 53 limits the large gear of the upper gear 813 in the vertical direction, and the mating notch of the horizontal limiting part of the second clamping block 53 limits the large gear of the upper gear 813 in the horizontal direction.

[0060] After the pneumatic finger 51 grips the upper shell assembly 81, the control mechanism drives the mounting bracket 25 to move via the drive mechanism 2, so that the pneumatic finger 51 transfers the upper shell assembly 81 directly above the second tray 4. At this time, the upper shell assembly 81 and the lower shell assembly 82 are opposite to each other, that is, the upper shell assembly 81 is placed directly above the lower shell assembly 82.

[0061] Subsequently, the control mechanism drives the mounting bracket 25 to descend via the drive mechanism 2, thereby indirectly driving the upper shell assembly 81 to descend, thus enabling the upper shell assembly 81 and the lower shell assembly 82 to partially engage. Specifically, the axial center hole of the upper gear 813 partially engages with the rotating shaft located in the inner cavity of the lower shell 821, and the lower end of the rotating shaft of the sector gear 812 partially engages with the mounting hole located in the inner cavity of the lower shell 821. Simultaneously, the lower end face of the large gear of the upper gear 813 abuts against the upper end face of the lower gear 822 (e.g., Figure 13(As shown). At this time, the upper housing 811 and the lower housing 821 are spaced apart, and the clamping mechanism 5 is spaced apart from the lower housing assembly 82.

[0062] Subsequently, the control mechanism controls the vacuum suction cup 615 to stop adsorbing the upper housing 811 through the air extraction device, and then controls the two grippers of the pneumatic finger 51 to open so that the clamping mechanism 5 is separated from the upper housing assembly 81.

[0063] After the clamping mechanism 5 separates from the upper shell assembly 81, the control mechanism drives the lever 74 to rotate by the toggle drive module 71, so that the lever 74 indirectly drives the sector gear 812 to rotate through the eccentric rod 815, and the rotating sector gear 812 drives the upper gear 813 to rotate.

[0064] When the teeth of the upper gear 813 and the tooth grooves of the lower gear 822 are aligned, the elastic element 614 returns to its original position. Under the action of the elastic element 614, the abutment rod 616 drives the upper gear 813 downwards, causing the large gear of the upper gear 813 to mesh with the lower gear 822. Simultaneously, as the elastic element 614 drives the abutment rod 616 downwards, it also drives the connecting base plate 613 downwards, causing the displacement sensor 63 to detect the downward displacement of the mating block 64. The displacement sensor 63 feeds back the detection result to the control mechanism, which then determines that the large gear of the upper gear 813 is meshing with the lower gear 822 based on this result.

[0065] After the control mechanism determines that the large gear of the upper gear 813 meshes with the lower gear 822, the control mechanism controls the drive end of the locking module 62 to move downward, so that the connecting top plate 611 abuts against the top surface of the mounting bracket 25, that is, the connecting bracket 61 becomes rigid. After the connecting bracket 61 becomes rigid, the control mechanism drives the mounting bracket 25 to descend through the drive mechanism 2, so that the abutment rod 616 presses down on the upper housing 811, thereby pressing the upper housing assembly 81 completely onto the lower housing assembly 82 to obtain the electric actuator.

[0066] After the electric actuator is assembled, the control mechanism controls the drive mechanism 2, the abutment mechanism 6, and the actuation mechanism 7 to reset, so that the clamping mechanism 5, the abutment mechanism 6, and the actuation mechanism 7 are all away from the electric actuator.

[0067] This embodiment utilizes the cooperation of a drive mechanism, a clamping mechanism, abutment mechanism, and actuating mechanism to press the upper shell assembly onto the lower shell assembly, effectively reducing manual operation time and costs and improving work efficiency. The cooperation between the actuating mechanism and the connecting frame ensures smooth meshing of gears within the upper and lower shell assemblies, reducing assembly difficulty. The cooperation between the connecting frame and the locking module allows the connecting frame to be either rigid or elastic.

[0068] Example 2 The difference between this embodiment and Embodiment 1 is that, in this embodiment, the lever 74 is a split structure.

[0069] Please see Figure 12 As shown, the lever 74 includes an upper lever 741 and a lower lever 742. The upper end of the upper lever 741 is connected to the shaft of the driven gear 73. The lower end of the upper lever 741 passes through the mounting bracket 25 and extends between the mounting bracket 25 and the connecting base plate 613. A plug-in locking block is provided at the bottom of the upper lever 741. The lower lever 742 is located below the upper lever 741. The lower lever 742 is rotatably mounted on the connecting base plate 613 via a bearing seat. A plug-in locking groove that mates with the plug-in locking block is provided at the top of the lower lever 742. The lower end of the lower lever 742 passes through the connecting base plate 613 and extends below the connecting base plate 613. A lever block 75 is provided at the bottom of the lower lever 742.

[0070] When the connecting bracket 61 slides up and down on the mounting bracket 25, the connecting base plate 613 drives the lower rod 742 to move up and down. Since the upper rod 741 and the lower rod 742 are connected by a plug-in block and a plug-in slot, the up and down movement of the plug-in block in the plug-in slot will not affect the transmission between the upper rod 741 and the lower rod 742.

[0071] In this embodiment, the lever 74 adopts a split structure, which facilitates disassembly and maintenance in the later stage and extends its service life.

[0072] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pressing device for an electric actuator, characterized in that, Includes a drive mechanism (2), a first tray (3), and a second tray (4) respectively set on the top of the frame (1); The drive mechanism (2) extends along the first horizontal direction, with the first tray (3) below one end and the second tray (4) below the other end; the drive end of the drive mechanism (2) is connected to the clamping mechanism (5), the abutting mechanism (6) and the actuating mechanism (7) respectively through the mounting bracket (25); The clamping mechanism (5) is located at the bottom of the mounting bracket (25), with its lower end being the clamping end; The abutting mechanism (6) includes a connecting frame (61) and a locking module (62); the connecting frame (61) is vertically and slidably mounted on the mounting frame (25), and an elastic element (614) abuts between the two; the lower end of the connecting frame (61) is a free end, located below the mounting frame (25), and the free end is adapted to abut against the top surface of the upper shell assembly (81) when the clamping mechanism (5) clamps the upper shell assembly (81); the locking module (62) is disposed between the mounting frame (25) and the connecting frame (61), and is adapted to control the connecting frame (61) to be rigid or elastic; The actuating mechanism (7) is vertically arranged; the upper end of the actuating mechanism (7) is a fixed end, which is arranged on the mounting bracket (25); the lower end of the actuating mechanism (7) is a driving end, which extends to the bottom of the connecting bracket (61); The control mechanism mounted on the frame (1) is adapted to drive the clamping mechanism (5) via the drive mechanism (2) to transfer the upper shell assembly (81) placed on the first tray (3) to directly above the lower shell assembly (82) placed on the second tray (4); the control mechanism is adapted to control the actuating mechanism (7) to actuate the eccentric rod (815) on the upper shell assembly (81) when the connecting frame (61) is elastic, so that the gear in the upper shell assembly (81) meshes with the gear in the lower shell assembly (82); the control mechanism is also adapted to control the connecting frame (61) to be rigid after the gear in the upper shell assembly (81) meshes with the gear in the lower shell assembly (82), and drive the connecting frame (61) to press down via the drive mechanism (2) so that the upper shell assembly (81) is pressed onto the lower shell assembly (82).

2. The pressing device according to claim 1, characterized in that, The connecting frame (61) includes a connecting top plate (611), a connecting column (612), and a connecting bottom plate (613) arranged sequentially from top to bottom. The connecting top plate (611) is positioned above the mounting bracket (25); the connecting bottom plate (613) is positioned below the mounting bracket (25); The connecting column (612) is vertically arranged, with its upper end fixedly connected to the connecting top plate (611), and its lower end vertically and slidably passing through the mounting frame (25) and connected to the connecting bottom plate (613); the elastic element (614) is sleeved on the connecting column (612), and both ends of the elastic element (614) abut against the mounting frame (25) and the connecting bottom plate (613) respectively; The bottom of the connecting base plate (613) is provided with an abutment rod (616) for abutting against the top surface of the upper shell assembly (81) and a vacuum suction cup (615) for adsorbing the top surface of the upper shell assembly (81). The locking module (62) is vertically arranged and placed above the mounting bracket (25); the upper end of the locking module (62) is a fixed end, which is set on the mounting bracket (25) by a support bracket (26); the lower end of the locking module (62) is a driving end, which is placed above the connecting top plate (611). The driving end of the locking module (62) is adapted to be spaced apart from the top of the connecting top plate (611) so that the connecting frame (61) is elastic; the driving end of the locking module (62) is adapted to drive the connecting top plate (611) to abut against the mounting frame (25) so that the connecting frame (61) is rigid.

3. The pressing device according to claim 2, characterized in that, The bottom of the connecting base plate (613) is provided with a plurality of abutment rods (616) spaced apart; the plurality of abutment rods (616) are adapted to be distributed relative to the axial center hole of the upper gear (813) on the upper shell assembly (81), the positioning post on the edge of the inner cavity of the upper shell (811), and the mounting hole of the lower gear in the inner cavity of the upper shell (811) when the clamping mechanism (5) clamps the upper shell assembly (81); The bottom of the connecting base plate (613) is also vertically provided with an anti-rotation stop (617), which is adapted to be placed above the lower edge protrusion of the upper shell assembly (81) when the clamping mechanism (5) clamps the upper shell assembly (81).

4. The pressing device according to claim 2, characterized in that, The contact mechanism (6) also includes a displacement sensor (63). The displacement sensor (63) is mounted on the mounting bracket (25); The connecting base plate (613) is provided with a mating block (64) that cooperates with the displacement sensor (63). The displacement sensor (63) is adapted to detect the relative displacement between the mounting bracket (25) and the connecting base plate (613); the control mechanism is adapted to determine whether the gear in the upper shell assembly (81) and the gear in the lower shell assembly (82) are meshed based on the information fed back by the displacement sensor (63).

5. The pressing device according to claim 1, characterized in that, The drive mechanism (2) includes a gantry (21), a first drive module (22), and a second drive module (23); The gantry (21) is disposed on the top of the frame (1); the top crossbeam of the gantry (21) extends along the first horizontal direction; the first tray (3) is located at one end of the top crossbeam, and the second tray (4) is located at the other end of the top crossbeam; The first drive module (22) extends along the first horizontal direction, its fixed end is disposed on the top crossbeam, and its drive end is connected to the fixed end of the second drive module (23) through the slide (24); the first drive module (22) is adapted to drive the second drive module (23) to move along the first horizontal direction; The second drive module (23) is vertically arranged; the upper end of the second drive module (23) is a fixed end, which is connected to the slide (24); the lower end of the second drive module (23) is a drive end, which is connected to the mounting frame (25); the second drive module (23) is adapted to drive the mounting frame (25) to move up and down.

6. The pressing device according to claim 1, characterized in that, The clamping mechanism (5) includes a pneumatic finger (51), a first clamping block (52), and a second clamping block (53); The fixed end of the pneumatic finger (51) is connected to the mounting bracket (25), and two grippers are provided opposite each other on the driving end of the pneumatic finger (51). There are two first clamping blocks (52), which are disposed on the inner side of the corresponding clamping claws; the lower end of the first clamping block (52) is provided with a clamping slot (521), which is suitable for cooperating with the lower edge protrusion of the upper shell assembly (81); There are two second clamping blocks (53), which are disposed on the outer side of the corresponding clamping claws; the second clamping blocks (53) are vertically disposed, and a horizontal limiting part is provided at their lower end; the upper part of the horizontal limiting part is provided with a mating notch for accommodating the upper gear (813), and the side wall of the mating notch is adapted to abut against the outer periphery of the upper gear (813); the lower part of the horizontal limiting part is adapted to limit the upper gear (813) on the upper shell assembly (81) in the vertical direction when the first clamping block (52) clamps the lower edge protrusion of the upper shell assembly (81).

7. The pressing device according to claim 6, characterized in that, The connecting base plate (613) of the connecting frame (61) is placed below the fixed end of the pneumatic finger (51) and between the two grippers; The pneumatic finger (51) has two grippers with adjusting bolts (511) on each side, and the adjusting bolts (511) are set horizontally. The outer wall of the connecting base plate (613) is adapted to slide into contact with the end of the adjusting bolt (511).

8. The pressing device according to claim 1, characterized in that, The toggle mechanism (7) includes a toggle drive module (71), a drive gear (72), a driven gear (73), and a lever (74). The toggle drive module (71) is placed above the mounting bracket (25), and the fixed end of the toggle drive module (71) is mounted on the mounting bracket (25) via a support bracket (26). The drive gear (72) is disposed on the drive end of the toggle drive module (71) and is positioned between the support frame (26) and the mounting frame (25); The driven gear (73) is rotatably mounted on the mounting bracket (25) via a bearing seat and meshes with the driving gear (72); The upper end of the lever (74) is connected to the shaft of the driven gear (73), and the lower end of the lever (74) passes through the mounting bracket (25) and extends to the bottom of the connecting bracket (61). The bottom of the lever (74) is provided with a lever block (75), and the notch on the lever block (75) is adapted to cooperate with the eccentric rod (815).

9. The pressing device according to claim 8, characterized in that, The lever (74) includes an upper lever (741) and a lower lever (742). The upper end of the upper rod (741) is connected to the shaft of the driven gear (73); the lower end of the upper rod (741) passes through the mounting bracket (25) and extends between the mounting bracket (25) and the connecting base plate (613) of the connecting bracket (61); the bottom of the upper rod (741) is provided with a plug-in block. The lower rod (742) is positioned below the upper rod (741) and is rotatably mounted on the connecting base plate (613) via a bearing seat. The top of the lower rod (742) is provided with a plug-in slot that mates with the plug-in block. The lower end of the lower rod (742) passes through the connecting base plate (613) and extends to the bottom of the connecting base plate (613). The lever (75) is located at the bottom of the lower rod (742).

10. The pressing device according to claim 1, characterized in that, The top of the first tray (3) is provided with a first receiving groove (31) for receiving the upper shell assembly (81). The first receiving groove (31) is provided with a C-shaped limiting block (32) for limiting the sector gear (812); the first receiving groove (31) is provided with an insertion hole for the sector gear (812) shaft to be inserted; the first receiving groove (31) is provided with a vertically arranged upright rod, which is suitable for cooperating with the axial center hole of the upper gear (813); The top of the second tray (4) is provided with a second receiving groove (41) for receiving the lower shell assembly (82).

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