CN211231816U

CN211231816U - Handle rotation limiting structure

Info

Publication number: CN211231816U
Application number: CN201922095303.7U
Authority: CN
Inventors: 崔琦; 刘敏海
Original assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Current assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-08-11
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a handle rotation limiting structure, which comprises a valve body, a mounting hole, a valve rod, a flat shaft, a handle and the like, wherein the top of the mounting hole is mainly provided with a long circular hole, and the long circular hole consists of two symmetrical arc-edge inner walls and two symmetrical straight-edge inner walls which enclose with the same axis; the flat shaft consists of two symmetrical outer cambered surfaces, two symmetrical straight surfaces and two pairs of symmetrical inclined surfaces which are connected between each adjacent outer cambered surface and the straight surface; when the rotating mechanism works, after one pair of symmetrical inclined planes of the flat shaft are respectively contacted with the two straight-edge inner walls of the long circular hole, the flat shaft rotates until the other pair of symmetrical inclined planes are respectively contacted with the two straight-edge inner walls of the long circular hole, and then the flat shaft can be limited, so that the rotation at a positive fixed angle and a negative fixed angle is formed; therefore, the improved structure has the advantages of simple structure, simple and convenient processing, easy assembly and the like, and can better solve the deflection phenomenon of the assembled handle and ensure that the error of the assembled handle rotation limiting angle is controlled in a smaller range.

Description

Handle rotation limiting structure

Technical Field

The utility model relates to a handle rotates limit structure, is particularly useful for the handle assembly correction of the right angle valve of various functions of opening and close and water injection well choke.

Background

Among current right angle valve and water injection well choke structure, the valve rod all rotates to be installed and open and close in order to realize the valve in the mounting hole of valve body, still can set up 90 rotation limit structure between valve rod and valve body to this convenience of customers masters the open position or the closed position of valve, and these rotate limit structure and adopt peripheral hardware structure mostly, receive accident to collide with the damage easily and lead to spacing inefficacy. Although the market also has an internal limiting structure, the structure often needs to be processed on a valve rod or a valve body, such as punching, slotting, pin installation and the like, and has the defects of inconvenient processing, troublesome assembly process, easy complication of an installation structure and the like. Meanwhile, the internal limiting structures are also easily influenced by machining precision and assembling precision, so that large errors exist, namely, the errors of the rotating limiting angle of the handle are larger than or smaller than 0.5 degrees, the accuracy of the rotating opening and closing angle of the handle cannot be guaranteed, and the special modeling requirements are difficult to meet. In addition, the valve usually adopts a quick-opening valve core with a spline at the top end of the valve rod, the handle is basically meshed with the top end of the valve rod through spline teeth in an assembling and connecting way, namely, the most appropriate spline tooth position is selected, and then the handle and the valve rod are fastened by adopting a screw; because the number of teeth of the spline teeth is generally 20-27 teeth, the handle after assembly generally has the phenomenon of skew deviation, the maximum axial coaxiality skew angle of the handle and the valve body can even reach 9 degrees, and the attractiveness of the appearance of a product is greatly influenced.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art's defect and provide a simple structure, processing is simple and convenient, the assembly is easy, can better solve the crooked deviation phenomenon of post-assembly handle and guarantee post-assembly handle rotation limit angle's error control at less within range handle rotation limit structure.

The technical problem of the utility model is realized through following technical scheme:

a handle rotation limiting structure comprises a valve body, a valve rod and a handle; the valve rod is rotatably arranged in the mounting hole of the valve body, the top of the valve rod is provided with a flat shaft which extends out of the mounting hole and is fixed with the handle, the top of the mounting hole is provided with a long circular hole, and the long circular hole is formed by two symmetrical arc inner walls and two symmetrical straight inner walls which are coaxially enclosed; the flat shaft consists of two symmetrical outer arc surfaces, two symmetrical straight surfaces and two pairs of symmetrical inclined surfaces which are connected between each adjacent outer arc surface and the straight surface; after one pair of symmetrical inclined surfaces of the flat shaft respectively contact the inner walls of the two straight edges of the long circular hole, the flat shaft rotates until the other pair of symmetrical inclined surfaces respectively contact the inner walls of the two straight edges of the long circular hole to form positive and negative fixed angle rotation limiting.

The angle alpha of the positive and negative fixed angle rotation limit formed by the flat shaft in the long round hole is 90 degrees +/-0.5 degrees.

The distance between the two symmetrical outer arc surfaces of the flat shaft is greater than the distance between the two symmetrical straight edge inner walls of the long circular hole, and the distance between the two symmetrical outer arc surfaces of the flat shaft is less than the distance between the two symmetrical arc edge inner walls of the long circular hole.

The distance between each pair of symmetrical inclined planes of the flat shaft is smaller than the distance between the inner walls of the two symmetrical arc edges of the long round hole, and the distance between each pair of symmetrical inclined planes of the flat shaft is larger than or equal to the distance between the inner walls of the two symmetrical straight edges of the long round hole.

The mounting hole is a round hole, the bottom of the valve rod is a round shaft which is rotatably assembled in the mounting hole, and a double-sealing ring is arranged between the round shaft and the mounting hole.

The outer surface of the round shaft is provided with an installation ring groove for embedding the double-sealing ring.

The lower end of the valve rod is provided with a falling-off prevention outer shoulder with the diameter larger than that of the mounting hole.

The bottom surface of the valve rod is provided with a screwing rib.

The top of the handle is provided with a screw for fixing the handle and the flat shaft.

The top of the handle is provided with a top hole for installing the screw, and a top cover for covering and sealing the screw is arranged in the top hole.

Compared with the prior art, the utility model mainly provides a handle rotation limiting structure with a new structure, which comprises a long circular hole arranged at the top of a mounting hole for the rotation mounting of a valve rod, wherein the long circular hole is composed of two symmetrical arc inner walls and two symmetrical straight inner walls which are enclosed with the same axle center; the flat shaft extending out of the mounting hole at the top of the valve rod and exposed out of the mounting hole is composed of two symmetrical outer arc surfaces and two symmetrical straight surfaces which are coaxially enclosed, and two pairs of symmetrical inclined surfaces which are connected between each adjacent outer arc surface and the straight surface; when the rotating mechanism works, after one pair of symmetrical inclined planes of the flat shaft are respectively contacted with the two straight-edge inner walls of the long circular hole, the flat shaft rotates until the other pair of symmetrical inclined planes are respectively contacted with the two straight-edge inner walls of the long circular hole, and then the flat shaft can be limited, so that the rotation at a positive fixed angle and a negative fixed angle is formed; the rotation limiting structure which adopts the mutually rotation matched flat shaft inclined planes to be attached to the straight edge inner wall of the long circular hole has the advantages of simple structure, simple and convenient processing, easy assembly and the like, and can ensure that the error of the rotation limiting angle of the handle is controlled in a smaller range after assembly, so that the rotation opening and closing angle of the handle is more accurate, and the specific modeling requirement is met; meanwhile, the flat shaft and the handle which are specially designed are matched and connected to replace a traditional spline tooth matching and connecting structure, and the problem of deflection deviation of the handle after assembly is solved well, so that the overall appearance of the product is harmonious, attractive and integrated.

Drawings

Fig. 1 is an exploded perspective view of the present invention.

Fig. 2 is a schematic sectional view showing the handle removed.

Fig. 3 is a schematic sectional structure view of the valve body.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic sectional view of the valve stem.

Fig. 6 is an enlarged top view of fig. 5.

Fig. 7 is a schematic diagram of the initial limit structure of the valve rod rotation (one pair of symmetrical inclined surfaces of the flat shaft respectively contact two straight-edge inner walls of the oblong hole).

Fig. 8 is a schematic structural view of the valve rod rotating by a positive and negative fixed angle and a limit angle.

Fig. 9 is a schematic view of the stop structure of the valve rod rotation (another pair of symmetrical inclined surfaces of the flat shaft respectively contact two straight-edge inner walls of the oblong hole).

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1 to 9, the valve body 1, the mounting hole 11, the long round hole 12, the arc inner wall 121, the straight inner wall 122, the anti-drop groove 13, the valve rod 2, the flat shaft 21, the outer arc surface 211, the straight surface 212, the inclined surface 213, the mounting ring groove 22, the anti-drop outer shoulder 23, the rotating rib 24, the handle 3, the top hole 31, the screw 4, the top cover 5 and the double sealing ring 6 are adopted.

A handle rotation limiting structure is shown in figures 1 and 2 and mainly relates to a handle rotation limiting structure of a right-angle valve or a water nozzle, which can control the initial position and the rotation angle of a handle 3 and structurally comprises a valve body 1, a valve rod 2 and the handle 3.

The valve rod 2 is rotatably installed in the installation hole 11 of the valve body 1, the installation hole is a round hole as shown in fig. 3 and 4, the top of the installation hole is provided with a long round hole 12, the long round hole is formed by two symmetrical arc-edge inner walls 121 and two symmetrical straight-edge inner walls 122 which are coaxially enclosed, namely, the installation hole is provided with two arc-edge inner walls 121 with the same size and two straight-edge inner walls 122 with the same size, and the installation hole is in a hole type structure formed by enclosing the arc-edge inner walls 121, the straight-edge inner walls 122, the arc-edge inner walls 121 and the straight-edge inner walls 122 in a closed manner according to the sequence.

The bottom of the valve rod 2 is a round shaft which is rotatably assembled in the mounting hole 11, and a double-channel sealing ring 6 is arranged between the round shaft and the mounting hole 11, and is specifically shown in fig. 5 and 6: the outer surface of the round shaft is provided with two mounting ring grooves 22, each mounting ring groove is internally provided with a sealing ring which is fixedly embedded, so that the round shaft not only forms rotary sealing with the mounting hole 11 through the two sealing rings 6, but also can provide certain friction force when the valve rod 2 rotates, and the valve rod 2 is soft and moderate in hand feeling when rotating.

Meanwhile, the lower end of the valve rod 2 is also provided with a take-off preventing external shoulder 23 with the diameter larger than that of the mounting hole 11, and the take-off preventing external shoulder is assembled in a take-off preventing groove 13 at the bottom of the mounting hole 11, so that the valve rod 2 can be prevented from being taken off upwards from the mounting hole 11, the height position of the valve rod 2 is limited, and the position of the valve rod matched with the handle 3 is more suitable; the bottom surface of the valve rod 2 is provided with a screwing rib 24 for assisting the installation of the valve rod 2 in the installation hole 11.

The top of the valve rod 2 is provided with a flat shaft 21 which extends out of the mounting hole 11 and the long round hole 12 and is fixed with the handle 3, the flat shaft is composed of two symmetrical outer arc surfaces 211 which are coaxially enclosed, two symmetrical straight surfaces 212 and two pairs of symmetrical inclined surfaces 213 which are connected between each adjacent outer arc surface 211 and the straight surface 212, namely, the flat shaft is provided with two outer arc surfaces 211 with the same size, two straight surfaces 212 with the same size and four inclined surfaces 213 with the same size, and the flat shaft structure is formed by enclosed closure according to the sequence of the outer arc surfaces 211, the inclined surfaces 213, the straight surfaces 212, the inclined surfaces 213, the outer arc surfaces 211, the inclined surfaces 213, the straight surfaces 212 and the inclined surfaces 213.

The flat shaft 21 is assembled in the long round hole 12, the distance between the two symmetrical outer arc surfaces 211 of the flat shaft 21 is greater than the distance between the two symmetrical straight-edge inner walls 122 of the long round hole 12, the distance between the two symmetrical outer arc surfaces 211 of the flat shaft 21 is less than the distance between the two symmetrical arc-edge inner walls 121 of the long round hole 12, the distance between each pair of symmetrical inclined surfaces 213 of the flat shaft 21 is less than the distance between the two symmetrical arc-edge inner walls 121 of the long round hole 12, and the distance between each pair of symmetrical inclined surfaces 213 of the flat shaft 21 is greater than or equal to the distance between the two symmetrical straight-edge inner walls 122 of the long round hole 12.

Therefore, its rotation limit structure does: after the pair of symmetrical inclined surfaces 213 of the flat shaft 21 respectively contact the two straight-side inner walls 122 of the oblong hole 12 as shown in fig. 7, the flat shaft 21 rotates as shown in fig. 9 until the other pair of symmetrical inclined surfaces 213 respectively contact the two straight-side inner walls 122 of the oblong hole 12, and at this time, the rotation of the flat shaft 21 is limited, so that the positive and negative angular rotations as shown in fig. 8 are formed.

Therefore, the valve rod 2 can be limited in rotation, and the limiting precision of the valve rod 2 can be controlled to be +/-0.5 degrees depending on machining precision of +/-0.05 mm, namely the angle alpha of the positive and negative fixed angle rotation limiting formed by the flat shaft 21 in the long round hole 12 is 90 degrees +/-0.5 degrees.

The rotation limiting structure for the flat shaft with the mutually rotation matched inclined surface to be attached to the straight edge inner wall of the long circular hole can ensure that the error of the rotation limiting angle of the handle 3 after assembly is controlled within a smaller range of +/-0.5 degrees, the rotation opening and closing angle of the handle 3 is more accurate, the specific modeling requirement is met, and the rotation limiting structure also has the advantages of simple structure, simplicity and convenience in processing, easiness in assembly and the like.

In addition, the mounting structure of the handle 3 and the flat shaft 21 is: the handle 3 is assembled on the flat shaft 21 through a flat hole with a matched shape, the top of the handle 3 is provided with a top hole 31, the flat shaft 21 and the handle 3 are fixed after the screw 4 passes through the top hole 31, and the top cover 5 is arranged in the top hole 31 to cover the top hole so as to seal the screw 4 and ensure the appearance attractiveness.

The flat shaft 21 designed by the special appearance is matched and connected with the handle 3 to replace the traditional spline tooth matching and connecting structure, so that the coaxiality error of the assembled handle 3 and the axial lead of the valve body 1 can be controlled within +/-0.5 degrees, the phenomenon of deflection deviation of the assembled handle 3 is avoided, and the integral appearance of the product is coordinated, attractive and integrated.

The above description is only an embodiment of the present invention, and it should be understood by those skilled in the art that any structural design equivalent to this embodiment is included in the scope of the present invention.

Claims

1. A handle rotation limiting structure comprises a valve body (1), a valve rod (2) and a handle (3); the valve rod (2) is rotatably installed in an installation hole (11) of the valve body (1), a flat shaft (21) extending out of the installation hole (11) and fixed with the handle (3) is arranged at the top of the valve rod (2), and the valve is characterized in that a long circular hole (12) is formed in the top of the installation hole (11), and the long circular hole is formed by two symmetrical arc-edge inner walls (121) and two symmetrical straight-edge inner walls (122) which are coaxially enclosed; the flat shaft (21) is composed of two symmetrical extrados (211) which are coaxially enclosed, two symmetrical straight surfaces (212) and two pairs of symmetrical inclined surfaces (213) which are connected between each adjacent extrados (211) and the straight surfaces (212); after one pair of symmetrical inclined surfaces (213) of the flat shaft (21) respectively contact two straight-edge inner walls (122) of the long round hole (12), the flat shaft (21) rotates until the other pair of symmetrical inclined surfaces (213) respectively contact two straight-edge inner walls (122) of the long round hole (12) to form positive and negative angle rotation limiting.

2. A handle rotation-limiting structure according to claim 1, wherein the flat shaft (21) forms a positive and negative angular rotation-limiting angle α of 90 ° ± 0.5 ° in the oblong hole (12).

3. The handle rotation limiting structure according to claim 1, wherein the distance between the two symmetrical outer arc surfaces (211) of the flat shaft (21) is greater than the distance between the two symmetrical straight-edge inner walls (122) of the oblong hole (12), and the distance between the two symmetrical outer arc surfaces (211) of the flat shaft (21) is less than the distance between the two symmetrical arc-edge inner walls (121) of the oblong hole (12).

4. A handle rotation limiting structure according to claim 1, wherein the distance between each pair of symmetrical inclined surfaces (213) of the flat shaft (21) is smaller than the distance between two symmetrical arc-shaped inner walls (121) of the oblong hole (12), and the distance between each pair of symmetrical inclined surfaces (213) of the flat shaft (21) is greater than or equal to the distance between two symmetrical straight-shaped inner walls (122) of the oblong hole (12).

5. A handle rotation limiting structure according to claim 1, wherein the mounting hole (11) is a circular hole, the bottom of the valve rod (2) is a circular shaft rotatably fitted in the mounting hole (11), and a double-seal ring (6) is provided between the circular shaft and the mounting hole (11).

6. The handle rotation limiting structure as claimed in claim 5, wherein the outer surface of the circular shaft is provided with a mounting ring groove (22) for embedding the double-seal ring (6).

7. A handle rotation limiting structure according to claim 5, wherein the lower end of the valve rod (2) is provided with a drop-proof external shoulder (23) with a diameter larger than that of the mounting hole (11).

8. The handle rotation limiting structure as claimed in claim 5, wherein the valve stem (2) is provided with a tightening rib (24) on the bottom surface.

9. The handle rotation limiting structure according to claim 1, wherein the top of the handle (3) is provided with a screw (4) for fixing the handle (3) and the flat shaft (21).

10. The handle rotation limiting structure according to claim 9, wherein the top of the handle (3) is provided with a top hole (31) for installing the screw (4), and a top cover (5) for covering and sealing the screw (4) is arranged in the top hole.