A screw bottom cover assembling machine for watch

Abstract

A watch threaded bottom cover assembly is used to rotate the bottom cover machine, relates to watch assembly device field, including base, support arm, support plate, control rotation rod and dial clamp, the upper surface of base is fixedly connected with dial clamp, the upper surface of base is fixedly connected with support arm, support arm is fixedly connected with support plate, the position of support plate corresponds with the position of dial clamp, control rotation rod is rotatably connected with support plate, control rotation rod is equipped with flexible torque sensing component, the bottom end of control rotation rod is connected with the fixed end of flexible torque sensing component through support plate, flexible torque sensing component is equipped with horizontal limit cover component, the detection end of flexible torque sensing component is connected with the fixed end of horizontal limit cover component, the position of horizontal limit cover component corresponds with the position of dial clamp, beneficial effect lies in: reduce the damage to dial and bottom cover thread due to the excessive torque of worker operation, improve the fault tolerance of worker installation bottom cover.

Description

Technical Field

[0001] This utility model relates to the field of watch assembly device technology, and in particular to a screw-on case back assembly machine for watches with threaded case backs. Background Technology

[0002] As is generally known, a watch case screw-down machine is a device used to screw the threaded watch case to the case back, thus assembling the watch case and case back.

[0003] Chinese patent CN222653275U discloses a screw-on case back assembly machine for watch threaded case backs, including a frame, a tightening assembly, a torque sensor, and a display device. The tightening assembly, in conjunction with the torque sensor and display device, controls the torque during manual installation. However, in practical use, the following problems still exist:

[0004] When workers install the watch cover by tightening the components, if the torque is insufficient, they can increase the torque to reach the threshold. However, if the worker accidentally applies torque exceeding the threshold, even if the torque sensor and display device prompt the worker to stop immediately, the excessive torque will have already damaged the threads of the dial and the back cover. Even if the adjustment is made, the damage cannot be undone. The tolerance for accidentally applying excessive torque beyond the threshold is low.

[0005] Therefore, a screw-on case back assembly machine for watch screw-on case backs is proposed. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a screw-on bottom cover assembly machine for watches.

[0007] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0008] A screw-on case back assembly machine for watches includes a base, a support arm, a support plate, a control screw rod, and a dial clamp. The dial clamp is fixedly connected to the center of the upper surface of the base. The edge of the upper surface of the base is fixedly connected to one end of the support arm, and the other end of the support arm is fixedly connected to the support plate. The position of the support plate corresponds to the position of the dial clamp. The support plate has a through hole at its center. The control screw rod is located in the through hole of the support plate and is rotatably connected to the support plate. The control screw rod has a flexible torque sensing component. The bottom end of the control screw rod passes through the through hole in the support plate and is connected to the fixed end of the flexible torque sensing component. The flexible torque sensing component has a horizontal limiting cover component. The detection end of the flexible torque sensing component is connected to the fixed end of the horizontal limiting cover component. The movable end of the horizontal limiting cover component is used to clamp the case back, and the position of the horizontal limiting cover component corresponds to the position of the dial clamp.

[0009] The flexible torque sensing component includes a flexible assembly, a torque sensor, and a torque display. The movable end of the flexible assembly is connected to the bottom end of the control lever, the fixed end of the flexible assembly is fixedly connected to the upper surface of the torque sensor, the detection end of the torque sensor is located below the torque sensor, the detection end of the torque sensor is connected to the horizontal limiting clamp component, and the torque sensor is electrically connected to the torque display.

[0010] The flexible component includes a housing, a limiting ring, and a torsion spring. The housing has a groove with the groove opening upwards. The bottom end of the control rod is located within the groove and rotatably connected to the housing. The inner wall of the housing has an annular limiting groove. The inner wall of the limiting ring is fixedly connected to the control rod. The limiting ring is located within the annular limiting groove and contacts the housing. The bottom end of the control rod is fixedly connected to the inner wall of the housing via the torsion spring. The lower surface of the housing is fixedly connected to the upper surface of the torsion sensor.

[0011] The horizontal limiting clamp component includes a sleeve, a bottom cover clamp, and a horizontal limiting assembly. The detection end of the torque sensor is detachably fixedly connected to the sleeve inside the sleeve. The lower surface of the sleeve is fixedly connected to the upper surface of the bottom cover clamp. The lower surface of the bottom cover clamp is connected to the fixed end of the horizontal limiting assembly. The movable end of the horizontal limiting assembly is in contact with the bottom cover.

[0012] The cross-section of the inner wall of the sleeve is a regular polygon, and the cross-sectional shape of the detection end of the torque sensor corresponds to the cross-sectional shape of the inner wall of the sleeve.

[0013] The bottom cover clamp includes a fixed block, a slider, a chuck, an elastic telescopic column, a bidirectional threaded rod, and a control block. The fixed block has a sliding groove and a through hole on its side. One end of the bidirectional threaded rod is rotatably connected to the inner wall of the fixed block away from the through hole. The other end of the bidirectional threaded rod passes through the through hole of the fixed block and is fixedly connected to the control block. The control block is in contact with the outer wall of the fixed block. The front thread of the bidirectional threaded rod and the rear thread of the bidirectional threaded rod have opposite helical directions. There are two sliders, two elastic telescopic columns, and two chucks. The slider is located in the sliding groove and is slidably connected to the fixed block. The two sliders are respectively threaded to the front and rear of the bidirectional threaded rod. The lower surface of the slider is fixedly connected to the upper surface of the chuck through the elastic telescopic column, and the elastic telescopic column is slidably connected to the fixed block.

[0014] The horizontal limiting component is a suction cup. The fixed end of the suction cup is fixedly connected to the lower surface of the fixed block. The suction end of the suction cup is in contact with the watch back cover. There are two sets of suction cups, which are symmetrically distributed on both sides of the bidirectional threaded rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This watch case back assembly screw-down machine, through the cooperation of the case back clamp and the horizontal limiting component, fixes the case back to a horizontal plane during use. This avoids insufficient installation accuracy caused by thread misalignment due to unevenness of the case back when it is initially screwed into the internal thread of the dial, thus improving installation efficiency. The flexible component and torque sensor work together to transmit torque, reducing damage to the threads of the dial and case back caused by excessive torque due to carelessness during operation, and improving the error tolerance of workers when installing case backs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the bottom cover clamp of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the flexible component of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the sleeve of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 6 This utility model Figure 5 A schematic diagram of the cross-sectional structure at point A is shown.

[0023] Figure 7 This utility model Figure 5 A schematic diagram of the cross-sectional structure at point B is shown.

[0024] 1. Base; 2. Support arm; 3. Support plate; 4. Control lever; 5. Dial clamp; 6. Flexible component; 7. Torque sensor; 8. Torque display; 9. Housing; 10. Torque spring; 11. Sleeve; 12. Bottom cover clamp; 13. Fixing block; 14. Slider; 15. Chuck; 16. Elastic telescopic column; 17. Bidirectional threaded rod; 18. Control block; 19. Sliding groove; 20. Suction cup; 21. Detection end; 22. Limiting ring. Detailed Implementation

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0026] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0027] like Figure 1 and Figure 5 As shown, a screw-on case back assembly machine for watches includes a base 1, a support arm 2, a support plate 3, a control screw rod 4, and a dial clamp 5. The dial clamp 5 is fixedly connected to the center of the upper surface of the base 1. The edge of the upper surface of the base 1 is fixedly connected to one end of the support arm 2, and the other end of the support arm 2 is fixedly connected to the support plate 3. The position of the support plate 3 corresponds to the position of the dial clamp 5. The center of the support plate 3 has a through hole. The control screw rod 4 is located in the through hole of the support plate 3 and is rotatably connected to the support plate 3. The control screw rod 4 is provided with a flexible torque sensing component. The bottom end of the control screw rod 4 passes through the through hole on the support plate 3 and is connected to the fixed end of the flexible torque sensing component. The flexible torque sensing component is provided with a horizontal limiting cover component. The detection end 21 of the flexible torque sensing component is connected to the fixed end of the horizontal limiting cover component. The movable end of the horizontal limiting cover component is used to clamp the case back, and the position of the horizontal limiting cover component corresponds to the position of the dial clamp 5.

[0028] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the flexible torque sensing component includes a flexible component 6, a torque sensor 7, and a torque display 8. The movable end of the flexible component 6 is connected to the bottom end of the control lever 4, the fixed end of the flexible component 6 is fixedly connected to the upper surface of the torque sensor 7, the detection end 21 of the torque sensor 7 is located below the torque sensor 7, the detection end 21 of the torque sensor 7 is connected to the horizontal limiting clamp component, and the torque sensor 7 is electrically connected to the torque display 8.

[0029] like Figure 3 and Figure 6 As shown, the flexible component 6 includes a housing 9, a limiting ring 22, and a torsion spring 10. The housing 9 has a groove inside, with the groove opening facing upwards. The bottom end of the control rod 4 is located in the groove of the housing 9 and is rotatably connected to the housing 9. The inner wall of the housing 9 has an annular limiting groove. The inner wall of the limiting ring 22 is fixedly connected to the control rod 4. The limiting ring 22 is located in the annular limiting groove of the housing 9 and is in contact with the housing 9. The bottom end of the control rod 4 is fixedly connected to the inner wall of the housing 9 through the torsion spring 10. The lower surface of the housing 9 is fixedly connected to the upper surface of the torsion sensor 7.

[0030] like Figure 1 , Figure 5 and Figure 7 As shown, the horizontal limiting clamping component includes a sleeve 11, a bottom cover clamp 12, and a horizontal limiting assembly. The detection end 21 of the torque sensor 7 is detachably fixedly connected to the sleeve 11 inside the sleeve 11. The lower surface of the sleeve 11 is fixedly connected to the upper surface of the bottom cover clamp 12. The lower surface of the bottom cover clamp 12 is connected to the fixed end of the horizontal limiting assembly. The movable end of the horizontal limiting assembly is in contact with the bottom cover.

[0031] like Figure 4 As shown, the cross-section of the inner wall of the sleeve 11 is a regular polygon, and the cross-sectional shape of the detection end 21 of the torque sensor 7 corresponds to the cross-sectional shape of the inner wall of the sleeve 11.

[0032] like Figure 2 and Figure 7As shown, the bottom cover clamp 12 includes a fixed block 13, a slider 14, a chuck 15, an elastic telescopic column 16, a bidirectional threaded rod 17, and a control block 18. The fixed block 13 is provided with a sliding groove 19 and a through hole on its side. One end of the bidirectional threaded rod 17 is rotatably connected to the inner wall of the fixed block 13 away from the through hole. The other end of the bidirectional threaded rod 17 passes through the through hole of the fixed block 13 and is fixedly connected to the control block 18. The control block 18 is in contact with the outer wall of the fixed block 13. The front thread of the bidirectional threaded rod 17 and the rear thread of the bidirectional threaded rod 17 have opposite helical directions. There are two sliders 14, two elastic telescopic columns 16, and two chucks 15. The slider 14 is located in the sliding groove 19 and is slidably connected to the fixed block 13. The two sliders 14 are respectively threaded to the front and rear of the bidirectional threaded rod 17. The lower surface of the slider 14 is fixedly connected to the upper surface of the chuck 15 through the elastic telescopic column 16, and the elastic telescopic column 16 is slidably connected to the fixed block 13.

[0033] like Figure 2 As shown, the horizontal limiting component is a suction cup 20. The fixed end of the suction cup 20 is fixedly connected to the lower surface of the fixing block 13. The suction end of the suction cup 20 is in contact with the bottom cover of the watch. There are two sets of suction cups 20, which are symmetrically distributed on both sides of the bidirectional threaded rod 17.

[0034] The work process is as follows:

[0035] S1. In use, first fix the dial on the dial clamp 5 of the base 1, align the bottom cover with the chuck 15 of the bottom cover clamp 12, and then rotate the control block 18 on the fixing block 13. The control block 18 drives the bidirectional threaded rod 17 to rotate in the sliding groove 19. The bidirectional threaded rod 17 drives the elastic telescopic column 16 to slide towards each other through the two sliders 14 connected by threads. The elastic telescopic column 16 drives the chuck 15 to slide towards each other and clamp the bottom cover. Then, the suction cup 20 is sucked onto the bottom cover. The bottom cover is fixed on a horizontal plane through the cooperation of the elastic telescopic column 16, the chuck 15 and the suction cup 20. This avoids the thread misalignment caused by the unevenness of the bottom cover when it is first screwed into the internal thread of the dial, which would result in insufficient installation accuracy and improve installation efficiency.

[0036] S2, after fixing the dial to the dial clamp 5 and the bottom cover to the bottom cover clamp 12, the worker presses down the control lever 4 on the support plate 3. When the bottom cover contacts the dial, the worker starts to rotate the control lever 4. The control lever 4 drives the torque sensor 7 to rotate through the torsion spring 10. The detection end 21 of the torque sensor 7 drives the bottom cover clamp 12 to rotate through the sleeve 11. At this time, the bottom cover fixed on the bottom cover clamp 12 is screwed into the dial. The torque sensor 7 displays the detected value on the torque display 8. When the torque displayed on the torque display 8 approaches the threshold, the worker begins to slowly rotate the control lever. When the torque display 8 shows a value that matches the threshold, the worker holds the control lever 4 and observes the dial status. Once the torque display 8 and the watch are stable, the worker can release the control lever 4 and remove the installed watch. When the torque exceeds the threshold, the worker quickly releases the control lever 4. Since the torque spring 10 is a flexible component, it will slow down the transmission of force. After release, the torque will be released onto the control lever 4, and the worker can then perform a second torque check. This avoids damage to the threads of the dial and case back due to excessive torque caused by worker error, and improves the error tolerance of the worker installing the case back.

[0037] The cross-section of the inner wall of the sleeve 11 is set as a regular polygon. The cross-sectional shape of the detection end 21 of the torque sensor 7 is matched with the cross-sectional shape of the inner wall of the sleeve 11. Since the regular polygon is more stable when releasing torque, the accuracy of the measurement data of the torque sensor 7 is improved. Since the torque spring 10 will compress or elongate when transmitting torque, the annular limiting groove and limiting ring 22 set on the inner wall of the outer shell 9 are used to avoid the compression or elongation of the torque spring 10 when transmitting torque. After the bottom cover is controlled to be in a horizontal position, since the thread screwing force is transmitted in a tangential direction, the torque transmitted by the torque spring 10 can also compensate for the tangential force during the installation process, further improving the fault tolerance of the bottom cover installation.

[0038] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A screw-down case assembly machine for a watch case, comprising a base (1), a support arm (2), a support plate (3), a control screw rod (4), and a dial clamp (5), wherein the dial clamp (5) is fixedly connected to the center of the upper surface of the base (1), one end of the support arm (2) is fixedly connected to the edge of the upper surface of the base (1), the other end of the support arm (2) is fixedly connected to the support plate (3), and the position of the support plate (3) corresponds to the position of the dial clamp (5), a through hole is provided in the center of the support plate (3), and the control screw rod (4) is located in the through hole of the support plate (3) and rotatably connected to the support plate (3), characterized in that: The control lever (4) is provided with a flexible torque sensing component. The bottom end of the control lever (4) passes through the through hole on the support plate (3) and is connected to the fixed end of the flexible torque sensing component. The flexible torque sensing component is provided with a horizontal limiting cover component. The detection end (21) of the flexible torque sensing component is connected to the fixed end of the horizontal limiting cover component. The movable end of the horizontal limiting cover component is used to clamp the bottom cover, and the position of the horizontal limiting cover component corresponds to the position of the dial clamp (5).

2. The screw-on case back assembly machine for a watch with a threaded case back as described in claim 1, characterized in that: The flexible torque sensing component includes a flexible assembly (6), a torque sensor (7), and a torque display (8). The movable end of the flexible assembly (6) is connected to the bottom end of the control lever (4). The fixed end of the flexible assembly (6) is fixedly connected to the upper surface of the torque sensor (7). The detection end (21) of the torque sensor (7) is located below the torque sensor (7). The detection end (21) of the torque sensor (7) is connected to the horizontal limiting clamp component. The torque sensor (7) is electrically connected to the torque display (8).

3. A screw-on case back assembly machine for a watch with a threaded case back according to claim 2, characterized in that: The flexible component (6) includes a housing (9), a limiting ring (22), and a torsion spring (10). The housing (9) has a groove inside, with the groove opening facing upwards. The bottom end of the control lever (4) is located in the groove of the housing (9) and is rotatably connected to the housing (9). The inner wall of the housing (9) has an annular limiting groove. The inner wall of the limiting ring (22) is fixedly connected to the control lever (4). The limiting ring (22) is located in the annular limiting groove of the housing (9) and is in contact with the housing (9). The bottom end of the control lever (4) is fixedly connected to the inner wall of the housing (9) through the torsion spring (10). The lower surface of the housing (9) is fixedly connected to the upper surface of the torsion sensor (7).

4. A watch case screw-on case assembly machine according to claim 3, characterized in that: The horizontal limiting clamp component includes a sleeve (11), a bottom cover clamp (12), and a horizontal limiting assembly. The detection end (21) of the torque sensor (7) is detachably fixedly connected to the sleeve (11) inside the sleeve (11). The lower surface of the sleeve (11) is fixedly connected to the upper surface of the bottom cover clamp (12). The lower surface of the bottom cover clamp (12) is connected to the fixed end of the horizontal limiting assembly. The movable end of the horizontal limiting assembly is in contact with the bottom cover.

5. A screw-on case back assembly machine for a watch with a threaded case back according to claim 4, characterized in that: The cross-section of the inner wall of the sleeve (11) is a regular polygon, and the cross-sectional shape of the detection end (21) of the torque sensor (7) corresponds to the cross-sectional shape of the inner wall of the sleeve (11).

6. A screw-on case back assembly machine for a watch with a threaded case back according to claim 4, characterized in that: The bottom cover clamp (12) includes a fixing block (13), a slider (14), a chuck (15), an elastic telescopic column (16), a bidirectional threaded rod (17), and a control block (18). The fixing block (13) is provided with a sliding groove (19), and the side of the fixing block (13) is provided with a through hole. One end of the bidirectional threaded rod (17) is rotatably connected to the inner wall of the fixing block (13) away from the through hole of the fixing block (13). The other end of the bidirectional threaded rod (17) passes through the through hole of the fixing block (13) and is fixedly connected to the control block (18). The control block (18) is in contact with the outer wall of the fixing block (13). The front thread of the threaded rod (17) and the rear thread of the bidirectional threaded rod (17) are in opposite directions. There are two sliders (14), two elastic telescopic columns (16) and two chucks (15). The slider (14) is located in the sliding groove (19) and is slidably connected to the fixed block (13). The two sliders (14) are respectively threaded to the front and rear of the bidirectional threaded rod (17). The lower surface of the slider (14) is fixedly connected to the upper surface of the chuck (15) through the elastic telescopic column (16), and the elastic telescopic column (16) is slidably connected to the fixed block (13).

7. A screw-on case back assembly machine for a watch with a threaded case back according to claim 6, characterized in that: The horizontal limiting component is a suction cup (20). The fixed end of the suction cup (20) is fixedly connected to the lower surface of the fixed block (13). The suction end of the suction cup (20) is in contact with the bottom cover of the watch. There are two sets of suction cups (20). The two sets of suction cups (20) are symmetrically distributed on both sides of the bidirectional threaded rod (17).

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