CN112908763A

CN112908763A - Universal travel switch contact

Info

Publication number: CN112908763A
Application number: CN202110367874.0A
Authority: CN
Inventors: 刘加将; 范小波
Original assignee: Sichuan Huaneng Kangding Hydropower Co Ltd
Current assignee: Sichuan Huaneng Kangding Hydropower Co Ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-06-04

Abstract

The invention discloses a universal travel switch contact, comprising a bearing mechanism and a main ball; the bearing mechanism is provided with a cavity; the part of the main ball larger than 1/2 is rotatably placed in the cavity of the bearing mechanism, and the cavity is The longest width of the opening is smaller than the diameter of the main ball; the combination of the main ball and the bearing mechanism of the present invention can make the contact realize free movement in a plane, and can ensure that the main ball will not fall off; Reduce the friction between the main ball and the bearing mechanism when rolling, so as to reduce the rolling resistance of the main ball; the thread cooperation between the outer sleeve and the inner sleeve can realize the relative position adjustment of the outer sleeve and the inner sleeve, so that the main ball and the auxiliary ball can be adjusted. Contact pressure, thereby adjusting the mobility of the cue ball.

Description

Universal travel switch contact

Technical Field

The invention relates to the technical field of travel switches, in particular to a universal travel switch contact.

Background

The travel switch is also called limit switch or position switch, and can be mounted on the relatively static object or moving object, when the moving object is close to the static object, the connecting rod of the switch can drive the contact of the switch to make the closed contact be opened or closed, and the action of circuit and control mechanism can be changed according to the opening and closing state of the switch contact. The travel switch is widely applied to modern industrial equipment, so that the equipment realizes an automatic control function, and is an important automation element. Fig. 1 shows a typical structure of a travel switch, which mainly includes a body 3, a cable cover 5, a fixing bolt 4, a sheath 2, a roller contact 6, and the like.

The contacts of the travel switch can now only move in a linear direction relative to the device, as shown in fig. 1 the contacts are roller type contacts, the rollers can only move in one linear direction. If the equipment has the motion perpendicular to the direction of motion of gyro wheel, then easily can cause the gyro wheel contact card to hinder, leads to travel switch action incorrect, even damages travel switch.

It is therefore desirable to develop a universal travel switch contact that solves the above problems.

Disclosure of Invention

The invention aims to solve the problems and designs a universal travel switch contact.

The invention realizes the purpose through the following technical scheme:

a gimbaled travel switch contact, comprising:

the bearing mechanism is internally provided with a cavity;

a main ball; the part of the main ball larger than 1/2 can be rotatably arranged in the cavity of the bearing mechanism, and the longest width of the opening of the cavity is smaller than the diameter of the main ball.

Specifically, the bearing mechanism includes:

a jacket;

an inner sleeve; a part of the inner sleeve is arranged in the outer sleeve; a cavity is formed between the inner part of the outer sleeve and the top of the inner sleeve.

Preferably, the top of the inner sleeve is provided with a concave main ball groove.

Preferably, a plurality of auxiliary balls are arranged at the top of the inner sleeve, and the lower end of the main ball is rotationally connected with the auxiliary balls.

Furthermore, a plurality of auxiliary ball grooves are formed in the surface of the main ball groove, and a plurality of auxiliary balls are correspondingly and rotatably arranged in the plurality of auxiliary ball grooves.

Preferably, the opening depths of the plurality of auxiliary ball grooves are the same.

Preferably, the plurality of auxiliary ball grooves are uniformly distributed on the main ball groove.

Preferably, an internal thread is formed on the inner wall of the outer sleeve, an external thread is formed on the outer wall of the inner sleeve, and the outer sleeve is in threaded connection with the inner sleeve.

Specifically, the outer jacket includes a lower section shell formed in a cylindrical ring shape and an upper section shell formed in a ring shape with an upper end extending inward, the upper end of the lower section shell being connected with the lower end of the upper section shell.

Preferably, the upper shell is formed in a ring shape having a diameter gradually decreasing from a lower end to an upper end, and an inner sidewall of the upper shell is formed as an inner spherical surface having a diameter slightly larger than that of the main ball.

The invention has the beneficial effects that:

1. through the combination and matching of the main ball and the bearing mechanism, the contact can realize free movement in one plane, and the main ball can not fall off;

2. the auxiliary ball can reduce the friction between the main ball and the bearing mechanism when the main ball rolls, so as to reduce the rolling resistance of the main ball.

3. The outer sleeve is matched with the inner sleeve through threads, so that the relative position of the outer sleeve and the inner sleeve can be adjusted, the contact pressure of the main ball and the auxiliary ball can be adjusted, and the mobility of the main ball can be adjusted.

Drawings

FIG. 1 is a schematic diagram of a roller contact according to the prior art;

fig. 2 is a schematic structural view of a ball contact according to the present application;

fig. 3 is a detailed structural diagram of the ball contact in the present application;

FIG. 4 is a schematic structural view of another embodiment of the inner sleeve of the present application;

FIG. 5 is a schematic structural view of a secondary ball groove of the present application;

FIG. 6 is a first embodiment of a structural schematic diagram of an upper shell of the present application;

FIG. 7 is a schematic structural diagram of a second embodiment of an upper shell according to the present application;

FIG. 8 is a schematic view of the connection structure of the outer sleeve and the inner sleeve in the present application;

FIG. 9 is a schematic structural view of the inner sleeve of the present application;

in the figure: 1. a ball-type contact; 11. a connecting rod; 12. a jacket; 121. a lower shell; 122. an upper section shell; 13. a secondary ball; 14. a main ball; 15. an inner sleeve; 151. an auxiliary ball groove; 152. an external thread; 153. a main ball groove; 2. a sheath; 3. a body; 4. fixing the bolt; 5. a cable cover; 6. roller type contact.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of embodiments of the invention refers to the accompanying drawings.

As shown in fig. 2, a body 3, a cable cover 5, a fixing bolt 4, a sheath 2, and a ball contact 1 are shown, and the lower end of the ball contact 1 is connected to the body.

As shown in fig. 3-5, a gimbaled travel switch contact comprises:

the bearing mechanism is internally provided with a cavity;

a main ball 14; the portion of the main ball 14 greater than 1/2 is rotatably disposed within a cavity of the carrier, the cavity opening having a longest width less than the diameter of the main ball 14.

In this embodiment, the portion of the main ball 14 larger than 1/2 is rotatably disposed in the cavity of the support mechanism, and the longest width of the cavity opening is smaller than the diameter of the main ball 14, so as to ensure that the main ball 14 does not fall off the support mechanism; the main ball 14 is rotatably disposed in the cavity, which means that the main ball 14 is not locked by various positions of the inner wall of the cavity when rotating. The main ball 14 may generate rotational friction with a certain position of the inner wall of the cavity only when rotating, but the free rotation of the main ball 14 is not affected, in this case, the lubricating substance can be injected into the cavity to reduce the rotational friction of the main ball 14, and the lubricating oil can be injected to achieve the effect of reducing the rotational friction of the main ball 14.

As shown in fig. 3-6, the load bearing mechanism includes:

an outer cover 12;

an inner sleeve; a part of the inner sleeve is arranged in the outer sleeve 12; a cavity is formed between the interior of the outer sleeve 12 and the top of the inner sleeve.

Due to the structural design in the embodiment, the method of preparing the sub-modules can be adopted in the actual manufacturing process, the modules are convenient to mount and replace, the main ball 14 is also convenient to replace, and the outer sleeve 12 and the inner sleeve can be connected through threads, welding, clamping and the like.

As shown in fig. 3-9, the top of the inner sleeve is provided with a concave main ball groove 153.

The structural design in the embodiment can make the installation of the main ball 14 more stable, and the supporting effect on the main ball 14 is better.

As shown in fig. 3, a plurality of sub balls 13 are provided at the top of the inner sleeve, and the lower ends of the main balls 14 are rotatably connected to the plurality of sub balls 13. In some embodiments, the auxiliary balls 13 are generally laid on the main ball grooves 153 of the inner sleeve in a single layer, and the positions of all the auxiliary balls 13 are not fixed, but the rolling of the main balls 14 is not influenced; because the position of the auxiliary ball 13 is not fixed, the installation is convenient. Because the auxiliary balls 13 are arranged, the direct friction between the main ball 14 and the inner sleeve is changed into rolling friction with the plurality of auxiliary balls 13, the friction force is reduced, and the rotating effect of the main ball 14 is better.

As shown in fig. 4 to 5, a plurality of sub ball grooves 151 are formed on the surface of the main ball groove 153, and a plurality of sub balls 13 are rotatably mounted in the plurality of sub ball grooves 151. By placing the sub ball 13 in the sub ball groove 151, the positional variation of the sub ball 13 can be reduced, and the rolling noise generated during use can be reduced.

As shown in fig. 5, the sub ball grooves 151 are formed to the same depth. Such structural design has guaranteed that main ball 14 can roll friction with all vice balls 13, avoids appearing some vice balls 13 and abrades comparatively seriously, and some vice balls 13 still take place for the condition of wearing and tearing, has played the benefit that can change all vice balls 13 at the same time, avoids vice ball 13 to change the difficulty that needs the inspection.

As shown in fig. 8 to 9, a plurality of sub ball grooves 151 are uniformly distributed on the main ball groove 153. This structure is designed to stably support each portion of the main ball 14 by the sub ball 13 when the main ball 14 rotates.

As shown in fig. 8 to 9, the outer sleeve 12 has an inner thread 152 formed on an inner wall thereof and an outer thread formed on an outer wall thereof, and the outer sleeve 12 is threadedly coupled with the inner sleeve. The outer sleeve 12 is in threaded connection with the inner sleeve, so that the relative positions of the inner sleeve and the outer sleeve 12 can be adjusted by rotating the inner sleeve or the outer sleeve 12, the compression degree of the main balls 14 and the auxiliary balls 13 is further adjusted, when the main balls 14 and the auxiliary balls 13 are worn, the auxiliary balls 13 can be pushed towards the main balls 14, and a certain rolling friction force between the main balls 14 and the auxiliary balls 13 is ensured.

As shown in fig. 6, the outer jacket 12 includes a lower section case 121 and an upper section case 122, the lower section case 121 is formed in a cylindrical ring shape, the upper section case 122 is formed in a ring shape with an upper end extending inward, and the upper end of the lower section case 121 is connected to the lower end of the upper section case 122. The mechanism of this embodiment is designed so that the main ball 14 does not fall.

As shown in fig. 7, the upper stage casing 122 is formed in a ring shape having a diameter gradually decreasing from the lower end to the upper end, and the inner side wall of the upper stage casing 122 is formed as an inner spherical surface having a diameter slightly larger than that of the main ball 14. The structural design of the upper shell 122 ensures that the main ball 14 is supported at a relative position, so that the main ball 14 is prevented from being displaced greatly, and the working accuracy of the main ball 14 is prevented from being influenced by the excessive displacement.

As shown in fig. 3 and 4, the lower end of the inner sleeve is connected with the upper end of the connecting rod 11, and the lower end of the connecting rod 11 is connected with the body of the travel switch.

The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A gimbaled travel switch contact, comprising:

the bearing mechanism is internally provided with a cavity;

2. The universal travel switch contact of claim 1, wherein the carrier mechanism comprises:

a jacket;

3. The contact of claim 2, wherein the top of the inner sleeve defines a concave main ball groove.

4. The contact of claim 3, wherein a plurality of auxiliary balls are disposed on the top of the inner sleeve, and the lower end of the main ball is rotatably connected to the plurality of auxiliary balls.

5. The universal travel switch contact as claimed in claim 4, wherein a plurality of secondary ball grooves are formed on the surface of the main ball groove, and a plurality of secondary balls are correspondingly and rotatably mounted in the plurality of secondary ball grooves.

6. The contact of claim 5, wherein the secondary ball grooves are formed to the same depth.

7. The contact of claim 5, wherein the plurality of secondary ball grooves are uniformly distributed on the primary ball groove.

8. The contact for a universal stroke switch according to any one of claims 2 to 7, wherein an inner thread is formed on an inner wall of the outer sleeve, an outer thread is formed on an outer wall of the inner sleeve, and the outer sleeve is threadedly coupled to the inner sleeve.

9. The universal travel switch contact according to any one of claims 2 to 7, wherein the outer casing comprises a lower section casing and an upper section casing, the lower section casing is formed in a cylindrical annular shape, the upper section casing is formed in an annular shape with an upper end extending inward, and the upper end of the lower section casing is connected to the lower end of the upper section casing.

10. The contact for the universal travel switch according to claim 9, wherein the upper shell is formed in a ring shape having a diameter gradually decreasing from the lower end to the upper end, and an inner sidewall of the upper shell is formed as an inner spherical surface having a diameter slightly larger than that of the main ball.