Stroke limiter

Abstract

A stroke limiter belongs to the technical field of limiters. The device comprises a base, a connecting shaft is inserted into the bottom of the base through a bearing, a main gear is fixed to the position, above the base, of the connecting shaft, and an ascending stroke limiting module and a descending stroke limiting module are arranged at the positions, located on the two opposite sides of the main gear, of the bottom of the base respectively. The main gear is meshed with the ascending stroke limiting module and the descending stroke limiting module at the same time, the side of the base is connected with a cable through a screwing piece, and one end outside the cable is connected with a plug. Through the limiting module with the buffering function, the problem of lost rotation caused by impact vibration is solved, the accuracy of the limiting position is ensured, the structure is modularized, adjustment and maintenance are more convenient, the overall structure is more precise, and the operation noise is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of limiters, and in particular relates to a travel limiter. Background Art

[0002] The existing travel limiter is made roughly. After being impacted and vibrated, the limit switch will occasionally lose its rotation, which will cause the limit position to change and affect the limit accuracy. At the same time, due to the rough structure, it will also generate a lot of noise during operation. Utility Model Content

[0003] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides a travel limiter; the utility model can solve the above problems of loss of rotation and loud noise due to impact vibration.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions.

[0005] The utility model provides a travel limiter, comprising a base, a connecting shaft is inserted into the bottom of the base through a bearing, a main gear is fixed to the connecting shaft above the base, an upward travel limit module and a downward travel limit module are respectively arranged on the bottom of the base at opposite sides of the main gear, the main gear is meshed with the upward travel limit module and the downward travel limit module at the same time, a cable is connected to the side of the base through a tightening piece, and a plug is connected to the outer end of the cable.

[0006] Furthermore, the upward stroke limit module has the same structure as the downward stroke limit module, and both include a base plate, an upper cover, a pillar, a large shaft, a large gear set, a small shaft, a small gear set, a cam, a micro-proximity switch, and a first wave spring. The base plate is connected to the bottom of the base, the pillars are multiple and arranged between the base plate and the upper cover, the two ends of the support are respectively connected to the base plate and the upper cover, the large shaft and the small shaft are both rotatably connected between the base plate and the upper cover, the large gear set is fixed to the large shaft, the small gear set is fixed to the small shaft, and the The large gear set and the small gear set are meshed with each other, and the main gear is meshed with the large gear sets of the rising stroke limit module and the falling stroke limit module at the same time. The two large gear sets are rotated in opposite directions through the rotation of the main gear and drive the two small gear sets to rotate in opposite directions. The upper end of the small shaft passes through the upper cover and is connected to the cam at the upper end. The upper side of the upper cover is connected to the micro-proximity switch next to the cam, so that the protrusion of the cam can touch the micro-proximity switch when the cam rotates. The first wave spring is arranged between the large gear at the upper end of the large gear set and the upper cover.

[0007] Furthermore, a top cap is provided on the outside of the cam, the top cap is connected to the upper side of the upper cover and has a side opening corresponding to the position of the cam, so that the protruding portion of the cam can extend from the opening, and a stop positioning platform is also connected on the small shaft between the cam and the top cap, and a second wave spring is provided between the stop positioning platform and the inner wall of the top cap.

[0008] Furthermore, the pillar is riveted to the bottom plate, and the pillar is connected to the upper cover by screws.

[0009] Furthermore, protective covers are provided on the outside of the ascending stroke limit module and the descending stroke limit module at the same time, and the protective covers are connected to the base and an O-ring is provided between the protective covers and the base.

[0010] Furthermore, a waterproof gasket is provided between the connecting shaft and the base.

[0011] Furthermore, a retaining ring is arranged at the lower bottom of the base outside the connecting shaft.

[0012] Furthermore, a connecting pin is provided at the lower portion of the connecting shaft.

[0013] The beneficial effects of the utility model.

[0014] The utility model has precise transmission, solves the problem of loss of rotation due to impact vibration through the limit module with buffer function, ensures the accuracy of the limit position, and has modular structure, convenient adjustment and maintenance, more precise overall structure and low operating noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0016] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the overall top view structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the rising stroke limit module (falling stroke limit module) of the utility model.

[0019] Figure 4 It is a schematic diagram of the internal three-dimensional structure of the utility model.

[0020] Figure 5It is a schematic diagram of the internal three-dimensional structure of the utility model from another viewing angle.

[0021] Markings in the figure: 1 is the base, 2 is the bearing, 3 is the connecting shaft, 4 is the main gear, 5 is the rising stroke limit module, 6 is the descending stroke limit module, 7 is the tightening part, 8 is the cable, 9 is the plug, 10 is the bottom plate, 11 is the upper cover, 12 is the pillar, 13 is the large shaft, 14 is the large gear set, 15 is the small shaft, 16 is the small gear set, 17 is the cam, 18 is the micro-motion proximity switch, 19 is the first wave spring, 20 is the top cap, 21 is the stopper positioning platform, 22 is the second wave spring, 23 is the protective cover, 24 is the O-ring, 25 is the waterproof gasket, 26 is the retaining ring, and 27 is the connecting pin. DETAILED DESCRIPTION

[0022] As shown in the accompanying drawings, this embodiment provides a travel limiter, including a base 1, a connecting shaft 3 is inserted into the bottom of the base 1 through a bearing 2, the connecting shaft 3 is used to connect to the external shaft, and a connecting pin 27 can be set at the lower part of the connecting shaft 3 to pin-connect with the external shaft.

[0023] The connecting shaft 3 is fixed with a main gear 4 above the base 1, and an ascending stroke limit module 5 and a descending stroke limit module 6 are respectively arranged on the bottom of the base 1 on opposite sides of the main gear 4, and the main gear 4 is simultaneously meshed with the ascending stroke limit module 5 and the descending stroke limit module 6. The left and right installation positions of the ascending stroke limit module 5 and the descending stroke limit module are selected according to whether the shaft descending direction when the main gear 4 rotates is counterclockwise or clockwise.

[0024] The upward stroke limit module 5 and the downward stroke limit module 6 have the same structure, both including a base plate 10, an upper cover 11, a support 12, a large shaft 13, a large gear set 14, a small shaft 15, a small gear set 16, a cam 17, a micro proximity switch 18, and a first wave spring 19.

[0025] The bottom plate 10 is connected to the bottom of the base 1, and there are multiple pillars 12 arranged between the bottom plate 10 and the upper cover 11. The two ends of the support are respectively connected to the bottom plate 10 and the upper cover 11. The pillars 12 are riveted to the bottom plate 10 to prevent loosening caused by vibration, and the pillars 12 are connected to the upper cover 11 by screws.

[0026] The large shaft 13 and the small shaft 15 are both rotatably connected between the base plate 10 and the upper cover 11, the large gear set 14 is fixed on the large shaft 13, the small gear set 16 is fixed on the small shaft 15, and the main gear 4, the large gear set 14 and the small gear set 16 are all coated with multifunctional universal grease.

[0027] The large gear set 14 and the small gear set 16 are meshed with each other, and the main gear 4 is meshed with the large gear set 14 of the rising stroke limit module 5 and the falling stroke limit module 6 at the same time. The two large gear sets 14 are rotated in opposite directions through the rotation of the main gear 4 and drive the two small gear sets 16 to rotate in the opposite directions. The upper end of the small shaft 15 passes through the upper cover 11 and is connected to the cam 17 at the upper end. The upper side of the upper cover 11 is connected to the micro-motion proximity switch 18 next to the cam 17, so that the protrusion of the cam 17 can touch the micro-motion proximity switch 18 when the cam 17 rotates. A first wave spring 19 is arranged between the large gear at the upper end of the large gear set 14 and the upper cover 11.

[0028] When the external shaft is working, it drives the connecting shaft 3 and the main gear 4 to rotate, and transmits the information through the meshing relationship between the main gear 4 and the large gear set 14, and between the large gear set 14 and the small gear set 16. When the cam 17 of the rising stroke limit module 5 moves upward and touches the micro-motion proximity switch 18, a stop signal is triggered and the upper limit position is reached; when the cam 17 of the falling stroke limit module 6 moves downward and touches the micro-motion proximity switch 18, a stop signal is triggered and the lower limit position is reached.

[0029] In addition, a top cap 20 is provided on the outside of the cam 17. The top cap 20 is connected to the upper side of the upper cover 11 and has a side opening corresponding to the position of the cam 17, so that the protruding portion of the cam 17 can extend from the opening. A stop positioning platform 21 is also connected on the small shaft 15 between the cam 17 and the top cap 20, and a second wave spring 22 is provided between the stop positioning platform 21 and the inner wall of the top cap 20.

[0030] The first wave spring 19 and the second wave spring 22 provide a buffering function to solve the problem of loss of rotation due to impact vibration.

[0031] A protective cover 23 is provided on the outside of the rising stroke limit module 5 and the falling stroke limit module 6. The protective cover 23 is connected to the base 1 and an O-ring 24 is provided between the protective cover 23 and the base 1. A waterproof gasket 25 is provided between the connecting shaft 3 and the base 1. A retaining ring 26 is provided on the bottom of the base 1 outside the connecting shaft 3 to provide dust and water protection.

[0032] A cable 8 is connected to the side of the base 1 through a tightening member 7 , and a plug 9 is connected to one end of the cable 8 .

[0033] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. A travel limiter, comprising a base (1), characterized in that: A connecting shaft (3) is inserted into the bottom of the base (1) through a bearing (2); a main gear (4) is fixed to the connecting shaft (3) above the base (1); an upward stroke limit module (5) and a downward stroke limit module (6) are respectively arranged on opposite sides of the main gear (4) at the bottom of the base (1); the main gear (4) is meshed with the upward stroke limit module (5) and the downward stroke limit module (6) at the same time; a cable (8) is connected to the side of the base (1) through a tightening member (7); and a plug (9) is connected to an outer end of the cable (8).

2. A travel limiter according to claim 1, characterized in that: The upward stroke limit module (5) and the downward stroke limit module (6) have the same structure, and both comprise a base plate (10), an upper cover (11), a pillar (12), a large shaft (13), a large gear set (14), a small shaft (15), a small gear set (16), a cam (17), a micro proximity switch (18), and a first wave spring (19). The base plate (10) is connected to the bottom of the base (1). The pillars (12) are multiple and are arranged between the base plate (10) and the upper cover (11). The two ends of the pillars are respectively connected to the base plate (10) and the upper cover (11). The large shaft (13) and the small shaft (15) are both rotatably connected between the base plate (10) and the upper cover (11). The large gear set (14) is fixed to the large shaft (13). The small gear set (16) is fixed to the large shaft (13). On the small shaft (15), the large gear set (14) and the small gear set (16) are meshed with each other, and the main gear (4) is meshed with the large gear sets (14) of the rising stroke limit module (5) and the falling stroke limit module (6) at the same time. The two large gear sets (14) are rotated in opposite directions by the rotation of the main gear (4) and drive the two small gear sets (16) to rotate in opposite directions. The upper end of the small shaft (15) passes through the upper cover (11) and is connected to the cam (17) at the upper end. The upper side of the upper cover (11) is connected to the micro-motion proximity switch (18) beside the cam (17), so that the protruding portion of the cam (17) can touch the micro-motion proximity switch (18) when the cam (17) rotates. The first wave spring (19) is arranged between the large gear at the upper end of the large gear set (14) and the upper cover (11).

3. A travel limiter according to claim 2, characterized in that: A top cap (20) is arranged outside the cam (17), and the top cap (20) is connected to the upper side of the upper cover (11) and has a side opening corresponding to the position of the cam (17), so that the protruding portion of the cam (17) can extend from the opening. A stop positioning platform (21) is also connected to the small shaft (15) between the cam (17) and the top cap (20), and a second wave spring (22) is arranged between the stop positioning platform (21) and the inner wall of the top cap (20).

4. A travel limiter according to claim 2, characterized in that: The support column (12) is riveted to the bottom plate (10), and the support column (12) is connected to the upper cover (11) via screws.

5. A travel limiter according to claim 1, characterized in that: A protective cover (23) is provided on the outside of the ascending stroke limit module (5) and the descending stroke limit module (6). The protective cover (23) is connected to the base (1) and an O-ring (24) is provided between the protective cover and the base (1).

6. A travel limiter according to claim 1, characterized in that: A waterproof gasket (25) is provided between the connecting shaft (3) and the base (1).

7. A travel limiter according to claim 1, characterized in that: A retaining ring (26) is provided on the lower bottom of the base (1) outside the connecting shaft (3).

8. A travel limiter according to claim 1, characterized in that: A connecting pin (27) is provided at the lower part of the connecting shaft (3).

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