CN114670895A - A switch machine indicating rod adjustment mechanism - Google Patents

Abstract

The invention discloses an adjusting mechanism of a switch machine indicating rod, comprising: a mounting seat, a worm, a worm wheel and a screw; the worm is rotatably mounted on the mounting seat; the worm wheel is rotatably mounted on the mounting seat and The worm gear is engaged with the worm, and the worm wheel is provided with a screw hole; the screw rod is inserted into the screw hole and is threadedly matched with the screw hole, and the screw rod is suitable for being connected with the indicator rod. The invention mainly uses the worm gear and worm structure to replace the original buckled and non-buckled shaft sleeve structure. The worm gear and worm structure has a large transmission ratio, and has strong bearing capacity, stable and reliable transmission, especially self-locking, so that the structure is stable, stable and reliable. Safety has been improved and mechanical components have been simplified.

Description

A switch machine indicating rod adjustment mechanism

technical field

The present invention relates to the technical field of switch machines, in particular to an adjustment mechanism for indicating rods of a switch machine.

Background technique

With the continuous development of my country's high-speed railways, the requirements for the stability and safety of the existing turnout conversion equipment are getting higher and higher. On-site maintenance often needs to adjust the length of the rod of the switch machine to ensure that the switch machine shows a gap. meet the standards.

In the application occasion of the existing adjustment mechanism, the adjustment structure is shown in Figure 1, which means that the rod is screwed onto the buttoned and non-buttoned shaft sleeves on the round hole of the screw joint, and the buckled shaft sleeve is driven by rotating the non-buttoned shaft sleeve in the expression. Move the connecting rod up to adjust the indication, and after the indication is adjusted, use the nut to hold the non-buckle bushing against the preparation and fix it. There are some problems with this structure. For example, the existing structure has the problem of buckled and non-buckled shaft sleeves that are easy to release during adjustment, and cannot achieve fine-tuning operation. , Poor tightening of the pressure nut, etc. The data changes suddenly after the adjustment of the turnout, and the daily equipment anti-loosening and anti-fall all rely on the tightening nut and spring washer, and the tightening is not in place due to operational omissions and other reasons. has happened.

In view of this, it is necessary to design a new adjustment structure with simple structure, convenient operation and not easy to loosen.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide a switch machine indicating lever adjustment mechanism.

The technical scheme of the present invention is as follows: a switch machine expressing rod adjustment mechanism, characterized in that it comprises: a mounting seat, a worm, a worm wheel and a screw;

The worm is rotatably mounted on the mounting seat; the worm wheel is rotatably mounted on the mounting seat and engages with the worm, and the worm wheel is provided with a screw hole; the screw rod passes through the screw hole It is threaded inside and is threaded with the screw hole, and the screw rod is adapted to be connected with the indicator rod.

Further, a cavity is provided inside the mounting seat, the worm wheel and the worm are both rotatably arranged in the cavity, the left end of the mounting seat is provided with a first through hole, and the right end is provided with a second through hole , the first through hole and the second through hole are both communicated with the cavity, and the screw rod passes through the second through hole and is threaded with the screw hole and passes through the first through hole out.

Further, the front end of the mounting seat is provided with a third through hole, the rear end of the mounting seat is provided with a fourth through hole, and both the third through hole and the fourth through hole communicate with the cavity , the front end of the worm is rotatably penetrated in the third through hole, and the rear end of the worm is rotatably penetrated in the fourth through hole; the screw shaft is fixedly connected with the front end of the worm , the adjusting head is fixedly connected with the rear end of the worm, and the locking nut is threadedly connected with the screw shaft and can abut with the mounting seat.

Further, the locking nut is a wing nut.

Further, the adjusting head is a square head, the worm is a single-head worm, the worm wheel is provided with 50 teeth, and the internal thread on the screw hole and the external thread on the screw rod are trapezoidal threads. , and the pitch of the trapezoidal thread is 5mm.

Further, one end of the worm extends out of the mounting seat; the screw shaft is fixedly connected to the extension end of the worm, the adjusting head is fixedly connected to the end of the screw shaft away from the worm, and the locking nut is connected to the end of the screw. The screw shaft is screwed and can abut with the mounting seat.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. The worm gear and worm structure are used to replace the original buckled and non-buckled bushing structures. The worm gear and worm structure has a large transmission ratio, strong bearing capacity, stable and reliable transmission, especially self-locking, which makes the structure stable and safe. Improved performance and simplified mechanical components;

2. One end of the worm is provided with a screw shaft and a locking nut, which can enhance the anti-loosening function in addition to the self-locking of the worm gear itself. In daily work, by tightening the nut, the worm gear can be effectively fixed. Anti-loose effect;

3. Set the adjusting head to be a square head, the worm is a single-head worm, the worm wheel is provided with 50 teeth, the internal thread on the screw hole and the external thread on the lead screw are trapezoidal threads, and the pitch of the trapezoidal thread is 5mm. In this way, after the thread spacing value and gear transmission ratio are optimized, the adjustment scale value is also quantified accordingly, so that one-time accurate adjustment of the switch notch value can be achieved, and the refined operation level of the turnout notch can be improved, and the operation is simple and easy to use. .

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative work:

Fig. 1 is the adjustment mechanism that shows the rod in the prior art;

Fig. 2 is the schematic diagram of embodiment 1 of the present invention;

3 is a top view of Embodiment 1 of the present invention;

4 is a front view of Embodiment 1 of the present invention;

5 is a rear view of Embodiment 1 of the present invention;

6 is a front view of Embodiment 2 of the present invention;

FIG. 7 is a plan view of Example 2 of the present invention.

Reference number:

1. Mounting seat; 2. Worm; 3. Worm gear; 4. Screw; 5. Screw shaft; 6. Locking nut; 7. Adjusting head.

Detailed ways

In order to make the purposes, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", The orientation or positional relationship indicated by "circumferential", "radial", "axial", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature.

Example 1

Referring to FIGS. 2-5 of the accompanying drawings, a switch machine according to Embodiment 1 will be described below. The rod adjustment mechanism includes: a mounting seat 1 , a worm 2 , a worm wheel 3 and a screw 4 .

As shown in Figure 2, the worm 2 is rotatably mounted on the mounting seat 1; the worm wheel 3 is rotatably mounted on the mounting seat 1 and engages with the worm 2, and the worm wheel 3 is provided with a screw hole; The screw holes are threaded, and the screw rod 4 is suitable for connecting with the indicating rod.

Specifically, the mounting seat 1 is provided with a cavity inside, and both the worm wheel 3 and the worm 2 are rotatably arranged in the cavity. The left end of the mounting seat 1 is provided with a first through hole, and the right end is provided with a second through hole. and the second through hole are both communicated with the cavity, the screw rod 4 passes through the second through hole and is threadedly matched with the screw hole and protrudes from the first through hole, so that the screw rod 4 and the worm wheel 3 can be threadedly connected.

The front end of the mounting seat 1 is provided with a third through hole, and the rear end of the mounting seat 1 is provided with a fourth through hole. In the third through hole, the rear end of the worm 2 is rotatably passed through the fourth through hole, so that the worm 2 can be rotated and installed.

In practical application, by rotating the worm 2, the worm wheel 3 can be driven to rotate. After the worm wheel 3 is rotated, it can drive the screw 4 to move and then drive the indicator rod to rotate, so as to realize the adjustment of the indicator gap of the switch machine. This kind of structure is simple and easy to operate.

The reason why the worm gear 3 worm 2 structure is used here is that the worm gear 3 worm 2 structure can have a large transmission ratio, and has strong bearing capacity, stable and reliable transmission, especially self-locking, that is, when the lead angle of the worm 2 is less than When the equivalent friction angle between the teeth of the worm wheel 3 is engaged, the mechanism has self-locking properties and can realize reverse self-locking, that is, only the worm wheel 2 can drive the worm wheel 3, but the worm wheel 3 cannot drive the worm wheel 2. Therefore, once the adjustment is completed, the screw The position of 4 will not fluctuate easily, the anti-loosening and anti-falling effect is good, and the size of the switch machine indicates that the size of the gap will not change suddenly.

Further, as shown in Fig. 3-Fig. 5, a screw shaft 5 and an adjustment head 7 can be respectively provided at both ends of the worm 2, wherein the screw shaft 5 is fixedly connected with the front end of the worm 2, and the adjustment head 7 is connected with the rear end of the worm 2. In a fixed connection, the locking nut 6 is threadedly connected with the screw shaft 5 and can abut with the mounting seat 1 .

After setting the adjusting head 7, it is convenient to use a wrench to clamp the adjusting head 7 and turn the worm 2 for adjustment; after setting the screw shaft 5 and the locking nut 6, the anti-loosening function can be enhanced again in addition to the self-locking of the worm gear 3 and the worm 2 itself. , In daily work, by tightening the nut, the fixing and anti-loosening effect of the worm gear 3 can be effectively enhanced. In practical applications, the locking nut 6 is a wing nut, so that it is convenient to tighten the nut manually.

Further, as shown in Figure 2, the adjustment head 7 is a square head, the worm 2 is a single-head worm 2, the worm wheel 3 is provided with 50 teeth, and the internal thread on the screw hole and the external thread on the lead screw 4 are trapezoidal. thread, and the pitch of the trapezoidal thread is 5mm.

Specifically, the inner and outer threads of the trapezoidal thread are not easy to loosen due to the tapered surface, so the trapezoidal thread is used here. Then the axial movement is 0.1mm. Since the adjustment head 7 is a square head, the adjustment head 7 can be rotated by one face to achieve a minimum adjustment of 0.025mm. Therefore, after optimizing the thread spacing value and gear transmission ratio, the corresponding quantification In order to adjust the scale value, the one-time accurate adjustment of the switch gap value can be achieved, and the operation is simple and easy to use.

Example 2

Embodiment 2 is a further improvement of Embodiment 1. As shown in Figures 6 and 7, in Embodiment 2, only one end of the worm 2 protrudes from the mounting seat 1, and the screw shaft 5 and the adjusting head 7 are both arranged on the same end of the worm 3, that is, the screw shaft is fixedly connected to the worm 2, The end of the screw shaft 5 away from the worm 2 is provided with an adjustment head 7, and the screw shaft 5 is provided with a locking nut 6. After tightening the locking nut 6, the worm 2 can be fixed, and after loosening the locking nut 6, the adjustment head can be used. 7. Rotate the worm 2. In this structure, since the screw shaft 5 and the adjusting head 7 are both arranged at the same end of the worm 3, the adjustment is more convenient and the structure is more compact.

In summary, this institution has the following characteristics:

1. The worm gear 3 worm 2 structure is used to replace the original buckled and non-buckled bushing structure. The worm gear 3 worm 2 structure has a large transmission ratio, and has strong bearing capacity, stable and reliable transmission, especially self-locking, making the structure Improved stability, safety, and simplified mechanical components;

2. One end of the worm 2 is provided with a screw shaft 5 and a locking nut 6, which can enhance the anti-loosening function again in addition to the self-locking of the worm gear 3 and the worm 2 itself. In daily work, by tightening this nut, it can be effectively Enhance the anti-loosening effect of fixing the worm gear 3;

3. Set the adjustment head 7 as a square head, the worm 2 is a single-head worm 2, the worm wheel 3 is provided with 50 teeth, the internal thread on the screw hole and the external thread on the screw 4 are trapezoidal threads, and the trapezoidal thread The screw pitch of the switch is 5mm, so after optimizing the thread spacing value and gear transmission ratio, the adjustment scale value is also quantified accordingly, so that one-time precise adjustment of the switch gap value can be achieved, and the fine operation level of the switch indicating gap can be improved. And the operation is simple and easy to use.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (6)

1. A switch machine indicator rod adjustment mechanism, comprising: the mounting seat, the worm wheel and the screw rod;

the worm is rotatably arranged on the mounting seat; the worm wheel is rotatably arranged on the mounting seat and meshed with the worm, and a screw hole is formed in the worm wheel; the screw rod penetrates through the screw hole and is in threaded fit with the screw hole, and the screw rod is suitable for being connected with the indicating rod.

2. The switch machine indicating rod adjusting mechanism of claim 1, wherein a cavity is formed in the mounting base, the worm wheel and the worm are rotatably disposed in the cavity, a first through hole is formed in the left end of the mounting base, a second through hole is formed in the right end of the mounting base, the first through hole and the second through hole are communicated with the cavity, and the screw rod penetrates through the second through hole, is in threaded fit with the screw hole and penetrates out of the first through hole.

3. A switch machine indicating rod adjusting mechanism as recited in claim 2, wherein the front end of the mounting base is provided with a third through hole, the rear end of the mounting base is provided with a fourth through hole, the third through hole and the fourth through hole are both in communication with the cavity, the front end of the worm is rotatably disposed in the third through hole, and the rear end of the worm is rotatably disposed in the fourth through hole;

The screw shaft is fixedly connected with the front end of the worm, the adjusting head is fixedly connected with the rear end of the worm, and the locking nut is in threaded connection with the screw shaft and can be abutted to the mounting seat.

4. A switch machine indication rod adjustment mechanism as claimed in claim 3, characterized in that the locking nut is a wing nut.

5. A switch machine indication rod adjustment mechanism as claimed in claim 3, characterized in that the adjustment head is a square head, the worm is a single-headed worm, 50 teeth are provided on the worm wheel, the internal thread on the screw hole and the external thread on the lead screw are both trapezoidal threads, and the pitch of the trapezoidal threads is 5 mm.

6. A switch machine indicating rod adjustment mechanism as recited in claim 2, wherein one end of the worm extends outwardly of the mounting block; the screw shaft is fixedly connected with the extending end of the worm, the adjusting head is fixedly connected with one end, far away from the worm, of the screw shaft, and the locking nut is in threaded connection with the screw shaft and can be abutted to the mounting seat.

Images