CN214152729U

CN214152729U - Limiting cam device

Info

Publication number: CN214152729U
Application number: CN202023308298.2U
Authority: CN
Inventors: 陈志强
Original assignee: Wenzhou Coze Lifting Electrical Appliance Co ltd
Current assignee: Wenzhou Coze Lifting Electrical Appliance Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-07
Anticipated expiration: 2030-12-31

Abstract

The utility model provides a spacing cam gear which characterized in that: the adjusting shaft can slide back and forth along the axial direction of the adjusting shaft, the adjusting shaft is provided with a first position which can be circumferentially limited by being locked with the front baffle and a second position which is unlocked with the front baffle and can rotate circumferentially, and the elastic part can drive the adjusting shaft to be kept at the first position. It is when the position of adjusting the cam subassembly, promote earlier that the regulating spindle moves backward, make the regulating spindle be in the second position, then the rotation regulating spindle, realize cam ring rotation regulation through the gear cooperation between combination tooth and the ring gear, accomplish the regulation back, loosen the regulating spindle and make the regulating spindle reset to the first position under the effect of elastic component, the regulating spindle is unable rotatory simultaneously through the gear cooperation between combination tooth and the ring gear realize the fixed unable rotation of cam ring relative center pin and adopt above-mentioned structure, when adjusting the cam subassembly position, need not to loosen the nut of center pin tip, it is more convenient to operate, and is accurate.

Description

Limiting cam device

Technical Field

The utility model relates to a limit switch technical field, concretely relates to limiting cam device.

Background

The limit switch is a mechanical switch commonly used in the market, and is widely applied to the fields of hoisting and transporting equipment, elevators, stage equipment and the like, particularly to places which are dangerous to workers, such as deceleration occasions, buffering occasions and the like of bridge cranes or lifting appliances. The limit switch drives a microswitch in the contact device through the rotation of the cam to achieve the positioning or termination of the equipment.

The main shaft is provided with a plurality of cams, when the main shaft rotates, the cams rotate along with the main shaft, and the concave-convex surface of the cams is used for controlling the micro-switches to generate opening and closing actions and generate passive signals and active signal input.

When the cam adjusting device is used, each cam needs to be set at a certain angle position to ensure accurate control, the angle position of each cam needs to be adjusted, the conventional cam adjusting method is complex, firstly, a fixing nut at the top of a central spindle needs to be loosened to enable each cam to be loosened relatively, then, an adjusting screw corresponding to each cam is adjusted through a screwdriver, after the adjustment is completed, the fixing nut at the top is screwed, the operation of the whole process is complex and tedious, particularly in the debugging process, the designated position can be reached through repeated adjustment for many times, and the cam adjustment is time-consuming and labor-consuming. In addition, when the fixing nut is loosened or tightened, the position of each cam may be slightly shifted, and the accuracy of adjustment cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of background art, the utility model provides a limiting cam device solves the problem that current limiting cam adjusts troublesome poeration.

The utility model discloses the technical scheme who adopts: a limiting cam device comprises a central shaft and a plurality of groups of cam assemblies and adjusting assemblies, wherein the cam assemblies are sequentially fixed on the central shaft, and each group of cam assemblies is correspondingly connected with one group of adjusting assemblies; the cam component comprises a front baffle, a rear baffle and a cam ring, the front baffle and the rear baffle are fixed on a central shaft, the cam ring is arranged between the front baffle and the rear baffle and forms rotary fit with the front baffle and the rear baffle, and an inner ring of the cam ring is formed with an inner ring gear; the adjusting component comprises an adjusting shaft and an elastic piece, the adjusting shaft is arranged in parallel with the central shaft, one end of the adjusting shaft extends into the cam ring and is provided with a combination tooth matched with the inner gear ring, the adjusting shaft can slide back and forth along the axial direction of the adjusting shaft and is provided with a first position which can be circumferentially limited with the front baffle and a second position which can be circumferentially rotated with the front baffle and can be unlocked, and the elastic piece can drive the adjusting shaft to be kept at the first position.

The front end face of the combination tooth is provided with end face teeth, the rear end face of the front baffle is correspondingly provided with limit teeth, and when the front baffle is located at the first position, the end face teeth and the limit teeth form circumferential limit matching.

The rear end face of the front baffle is provided with a circular groove matched with the combination teeth, the limiting teeth are arranged on the bottom surface of the circular groove, and the upper ends of the combination teeth are embedded into the circular groove.

The elastic piece is a spring, one end of the spring is abutted against the rear baffle, and the other end of the spring is abutted against the rear end face of the combination tooth.

The front end of the rear baffle is provided with a spring groove matched with a spring, and the spring is correspondingly arranged in the spring groove.

The spring groove is characterized in that a positioning hole is formed in the center of the bottom of the spring groove, a positioning shaft part is correspondingly formed at the rear end of the adjusting shaft, and the positioning shaft part is inserted into the positioning hole.

An operation hole is formed at the front end of the adjusting shaft.

The front baffle and the rear baffle between adjacent cam assemblies are of an integrated structure.

The center of the front baffle is provided with a limit post extending backwards, and the limit post is abutted to the rear baffle.

The center pin is including being regular hexagon's axis body, axis body one end is formed with spacing boss, and the other end is formed with the screw shaft, the cam subassembly overlaps in proper order and establishes on the axis body, and its one end is spacing with spacing boss, and the other end passes through the fixed locking of nut.

The utility model has the advantages that: it is when the position of adjusting the cam subassembly, promote earlier that the regulating spindle moves backward, make the regulating spindle be in the second position, then the rotation regulating spindle, realize cam ring rotation regulation through the gear cooperation between combination tooth and the ring gear, accomplish the regulation back, loosen the regulating spindle and make the regulating spindle reset to the first position under the effect of elastic component, the regulating spindle is unable rotatory simultaneously through the gear cooperation between combination tooth and the ring gear realize the fixed unable rotation of cam ring relative center pin and adopt above-mentioned structure, when adjusting the cam subassembly position, need not to loosen the nut of center pin tip, it is more convenient to operate, and is accurate.

Drawings

Fig. 1 is a schematic structural view of a limiting cam device according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a limiting cam device according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a mandrel according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of one set of cam assembly and adjusting assembly according to an embodiment of the present invention.

Fig. 5 is an exploded view of one set of cam assemblies and adjustment assemblies according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view of one set of cam assembly and adjustment assembly according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a front baffle according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a rear baffle according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of an adjusting shaft according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in the figure, the limiting cam device comprises a central shaft 1, a cam component 2 and an adjusting component 3.

Center pin 1 is including being regular hexagon's

axis body

11, 11 one end of axis body is formed with spacing boss 12, and the other end is formed with threaded shaft 13, cam subassembly 2 is equipped with 6 groups to overlap in proper order and establish on axis body 11, 6 one end and the spacing boss 12 of group cam subassembly 2 are spacing, and the other end passes through nut 14 and the fixed locking of threaded shaft 13 cooperation, and constitutes the spacing cooperation of circumference with regular hexagon's axis body 11, consequently when central shaft 1 is rotatory, can drive this 6 group cam subassembly 2 synchronous rotations.

The shaft body 11 of the central shaft 1 is not limited to a regular hexagon, and can also realize circumferential limit with the cam assemblies 2 through other shapes or structures, the number of the cam assemblies 2 is not limited to 6 groups, and can be specifically selected according to actual requirements, and of course, the number of the cam assemblies is at least 2 groups, and is usually 3 groups or more than 3 groups.

The cam assembly 2 comprises a front baffle 21, a rear baffle 22 and a cam ring 23, wherein the centers of the front baffle 21 and the rear baffle 22 are formed with a regular hexagonal hole matched with the shaft body 11 and fixedly mounted on the central shaft 1, the cam ring 23 is arranged between the front baffle 21 and the rear baffle 22 and forms a rotating fit with the front baffle 21 and the rear baffle 22 so as to facilitate the rotating adjustment of the cam ring 23, and an inner ring 231 is formed in the inner ring of the cam ring 23.

The number of the adjusting assemblies 3 is the same as that of the cam assemblies 2, 6 groups are also arranged, and each group of adjusting assemblies 3 is correspondingly matched with one group of cam assemblies 2 respectively and is used for adjusting the position and the angle of each group of cam assemblies 2 respectively.

The adjusting assembly 3 comprises an adjusting shaft 31 and an elastic element 32, the adjusting shaft 31 is arranged in parallel with the central shaft 1, the adjusting shafts of the adjusting assemblies in each group are different in length and are uniformly distributed along the central circumference of the central shaft 1, one end of each adjusting shaft extends into the cam ring 23 matched with the cam assembly 2 in one group, and is provided with a combination tooth 311 matched with the inner ring 231 of the inner ring of the cam ring 23, the adjusting shaft 31 can slide back and forth along the axial direction of the adjusting shaft 31 and is provided with a first position capable of being locked with the front baffle 21 in circumferential limiting mode and a second position capable of being unlocked with the front baffle 21 and rotating in circumferential mode, and the elastic element 32 can drive the adjusting shaft 31 to be kept at the first position.

Wherein, the front end face of the combination tooth 311 is formed with an end face tooth 312, the rear end face of the front baffle 21 is correspondingly formed with a limit tooth 211, and when being at the first position, the end face tooth 312 and the limit tooth 211 can mutually form circumferential limit matching.

The elastic member 32 is a spring, one end of the spring abuts against the rear baffle 22, and the other end of the spring abuts against the rear end surface of the engaging tooth 311, and the spring drives the adjusting shaft 31 to move forward, so that the adjusting shaft 31 is kept at the first position.

The front end of the adjusting shaft 31 is formed with an operation hole 314 capable of being fitted with a screwdriver.

When the position of the cam assembly needs to be adjusted, the screwdriver is firstly pressed backwards to align with the operation hole 314, thereby pushing the adjusting shaft 31 to move backwards, so that the adjusting shaft 31 is moved to the second position, then the screwdriver is rotated to drive the adjusting shaft 31 to rotate synchronously, the adjusting shaft 31 realizes the rotation adjustment of the cam ring 23 through the gear matching between the combination teeth 311 and the inner gear ring 231, after the adjustment is finished, the adjusting shaft 31 is released, so that the adjusting shaft 31 is reset and kept at the first position under the action of the elastic piece 32, the adjusting shaft 31 is locked with the limiting teeth 211 through the end surface teeth 312 and cannot rotate, while the cam ring 23 cannot perform a rotating motion by the gear engagement between the coupling teeth 311 and the inner ring gear 231, therefore, when the position of the cam component is adjusted by adopting the structure, the nut at the end part of the central shaft does not need to be loosened, the adjustment operation is directly carried out, and the operation is more convenient and accurate.

In addition, a circular groove 212 matched with the combining tooth 311 is formed on the rear end surface of the front baffle 21, the limiting tooth 211 is arranged on the bottom surface of the circular groove 212, the upper end of the combining tooth 311 is embedded into the circular groove 212, a spring groove 221 matched with a spring is formed at the front end of the rear baffle 22, a positioning hole 222 is formed in the center of the bottom of the spring groove 221, the spring is correspondingly arranged in the spring groove 221, a positioning shaft part 313 is correspondingly formed at the rear end of the adjusting shaft 31, and the positioning shaft part 313 is inserted into the positioning hole 222.

The front baffle and the rear baffle between adjacent cam assemblies 2 can be directly of an integrated structure.

The structure not only enables the adjusting shaft 31, the front baffle 21 and the rear baffle 22 to form a more reliable positioning matching structure, ensures stable and reliable action and accurate adjustment, but also enables the structure to be more compact and reasonable.

Preceding baffle 21 center is equipped with spacing post 213 that extends backward, spacing post 213 offsets with backplate 22, and when each group cam subassembly 2 cover was established on center pin 1, by preceding baffle 21 and backplate 22 each other form the axial spacing, avoid directly compressing tightly the cam ring 23 between the dead preceding baffle 21 of locking and the backplate 22, when adjusting the cam ring 23, the action of cam ring 23 is lighter, and the operation is also lighter.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. A limiting cam device comprises a central shaft (1) and a plurality of groups of cam assemblies (2) and adjusting assemblies (3), wherein the cam assemblies (2) are sequentially fixed on the central shaft (1), and each group of cam assemblies (2) is correspondingly connected with one group of adjusting assemblies (3);

the method is characterized in that: the cam assembly (2) comprises a front baffle (21), a rear baffle (22) and a cam ring (23), the front baffle (21) and the rear baffle (22) are fixed on the central shaft (1), the cam ring (23) is arranged between the front baffle (21) and the rear baffle (22) and forms a rotating fit with the front baffle (21) and the rear baffle (22), and an inner ring (231) is formed in the inner ring of the cam ring (23);

the adjusting assembly (3) comprises an adjusting shaft (31) and an elastic piece (32), the adjusting shaft (31) is arranged in parallel with the central shaft (1), one end of the adjusting shaft extends into the cam ring (23) and is provided with a combination tooth (311) matched with the inner gear ring (231), the adjusting shaft (31) can slide back and forth along the axial direction of the adjusting shaft, the adjusting shaft has a first position which can be locked with the front baffle (21) in a circumferential limiting mode and a second position which is unlocked with the front baffle (21) and can rotate in the circumferential direction, and the elastic piece (32) can drive the adjusting shaft (31) to be kept at the first position.

2. The spacing cam device of claim 1, wherein: the front end face of the combination tooth (311) is provided with end face teeth (312), the rear end face of the front baffle (21) is correspondingly provided with limit teeth (211), and when the front baffle is located at the first position, the end face teeth (312) and the limit teeth (211) form circumferential limit matching.

3. The spacing cam device of claim 2, wherein: the rear end face of the front baffle (21) is provided with a circular groove (212) matched with the combination teeth (311), the limiting teeth (211) are arranged on the bottom face of the circular groove (212), and the upper ends of the combination teeth (311) are embedded into the circular groove (212).

4. The spacing cam device of claim 1, wherein: the elastic piece (32) is a spring, one end of the spring is abutted against the rear baffle (22), and the other end of the spring is abutted against the rear end face of the combination tooth (311).

5. The spacing cam device of claim 4, wherein: the front end of the rear baffle (22) is provided with a spring groove (221) matched with a spring, and the spring is correspondingly arranged in the spring groove (221).

6. The spacing cam device of claim 5, wherein: a positioning hole (222) is formed in the center of the bottom of the spring groove (221), a positioning shaft part (313) is correspondingly formed at the rear end of the adjusting shaft (31), and the positioning shaft part (313) is inserted into the positioning hole (222).

7. The spacing cam device of claim 5, wherein: an operation hole (314) is formed at the front end of the adjusting shaft (31).

8. The spacing cam device of claim 1, wherein: the front baffle and the rear baffle between the adjacent cam assemblies (2) are of an integrated structure.

9. The spacing cam device of claim 1, wherein: the center of the front baffle (21) is provided with a limit column (213) extending backwards, and the limit column (213) is abutted against the rear baffle (22).

10. The spacing cam device of claim 1, wherein: center pin (1) is including being regular hexagon's axis body (11), axis body (11) one end is formed with spacing boss (12), and the other end is formed with threaded shaft (13), cam subassembly (2) overlaps in proper order and establishes on axis body (11), and its one end is spacing with spacing boss (12), and the other end passes through nut (14) fixed locking.