Insulation connection structure, welding machine head thereof and steel rail flash welding machine

Abstract

The utility model discloses an insulation connecting structure which is connected between one end of an upsetting shaft and a clamp and comprises a locking nut and an insulation connecting assembly. Wherein the locking nut is connected to the middle of one end of the upsetting shaft, and the insulation connecting assembly wraps the locking nut and the position, connected with the clamp, of the upsetting shaft; compared with the prior art, the locking nut is matched with the insulation connecting assembly, so that the contact area between the insulation connecting assembly and the upsetting shaft is relatively large, the borne pressure intensity is relatively small, the clamp is not prone to being abraded and damaged, the insulation reliability between the clamp and the upsetting shaft is improved, and the risk of short circuit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flash welding machines, in particular to an insulating connection structure, a welding machine head thereof and a rail flash welding machine. Background Art

[0002] A rail flash welding machine is a device used for welding rails. For example, a railway turnout flash welding machine head disclosed in CN117961244A includes two static frame wedge clamps arranged oppositely, two moving frame wedge clamps arranged oppositely, two upset cylinders arranged oppositely, a first clamping cylinder, a second clamping cylinder and a central shaft. Among them: the upset cylinder includes an upset cylinder body and a piston rod drivingly connected to the upset cylinder body, the upset cylinder body is installed on the static frame wedge clamp, and the piston rod is connected to the moving frame wedge clamp to drive the moving frame wedge clamp to reciprocate; the first clamping cylinder includes a first clamping cylinder body and a first telescopic rod drivingly connected to the first clamping cylinder body, the first clamping cylinder body is installed on the central shaft, the upper ends of the two static frame wedge clamps are symmetrically installed on the first telescopic rod, and the first telescopic rod is telescopically arranged in a direction perpendicular to the central shaft; the second clamping cylinder includes a second clamping cylinder body and a second telescopic rod drivingly connected to the second clamping cylinder body, the second clamping cylinder body is installed on the central shaft, the upper ends of the two moving frame wedge clamps are symmetrically installed on the second telescopic rod, and the second telescopic rod is telescopically arranged in a direction perpendicular to the central shaft; the central shaft passes through the two static frame wedge clamps and the two moving frame wedge clamps respectively, so that the two static frame wedge clamps and the two moving frame wedge clamps can be rotatably installed on the central shaft; the lower end of the static frame wedge clamp includes a first wedge member, the lower end of the moving frame wedge clamp includes a second wedge member, and the two first wedge members are used for clamping or loosening a first rail, and the two second wedge members are used for clamping or loosening a second rail.

[0003] The above-mentioned railway turnout flash welding machine head does not specifically disclose the connection method between the moving frame wedge clamp and the upset shaft. The existing connection method between the moving frame wedge clamp and the upset shaft of a rail welding machine head is to process a groove on the upset shaft as a positioning surface, install a snap ring on the groove surface, and then connect between the upset shaft and the moving frame wedge clamp by means of flange pressing or nut pressing. The connection method has the problems that the contact surface of the snap ring is relatively small and the bearing pressure is relatively large, and it is easy to deform and generate gaps after being stressed, thus affecting the stability of the rail welding machine head. After the snap ring is deformed, the wear of the insulating part of the upset shaft is aggravated and fails, and there is a risk of short circuit between the moving frame wedge clamp and the upset shaft. Content of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the present utility model is to provide an insulating connection structure, a welding machine head and a rail flash welding machine thereof, so as to solve the problems in the prior art that the contact surface of the snap ring is relatively small and the pressure borne is relatively large in the connection mode between the clamp and the upsetting shaft, which is easy to deform and generate gaps after being stressed, affecting the stability of the rail welding machine head and having a risk of short - circuit hidden danger between the clamp and the upsetting shaft.

[0005] To achieve the above - mentioned purpose, the following technical solutions are adopted in the first aspect of the present utility model: An insulating connection structure is connected between one end of the upsetting shaft and the clamp, and includes:

[0006] A locking nut, which is connected to the middle of one end of the upsetting shaft;

[0007] An insulating connection assembly, which is wrapped outside the locking nut and the position where the upsetting shaft is connected to the clamp.

[0008] The following technical solutions are adopted in the second aspect of the present utility model: A welding machine head includes an upsetting shaft and a clamp, and further includes an insulating connection structure as described in the first aspect of the present utility model, which is connected between the upsetting shaft and the clamp.

[0009] The following technical solutions are adopted in the third aspect of the present utility model: A rail flash welding machine includes the welding machine head as described in the second aspect of the present utility model.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] This insulating connection structure uses the cooperation of a locking nut and an insulating connection assembly to make the contact area between the insulating connection assembly and the upsetting shaft relatively large, so the pressure received is relatively small, thus it is not easily worn and damaged, improving the insulation reliability between the clamp and the upsetting shaft and reducing the short - circuit risk. Description of the Drawings

[0012] Figure 1 is a cross - sectional view of an embodiment of the present utility model;

[0013] Figure 2 is Figure 1 a partial enlarged view of part A in

[0014] The reference numerals in the drawings of the specification include: upsetting shaft 1, clamp 2, locking nut 3, insulating connection assembly 4, upsetting shaft insulating pad 41, upsetting shaft insulating ring 42, nut insulating pad 43, nut insulating sheath 44, upsetting oil cylinder 5, piston seal sleeve 6. Detailed Description of the Embodiment

[0015] The following further detailed description of the present utility model is given through specific embodiments:

[0016] Since the connection mode between the moving frame wedge clamp 2 and the upsetting shaft 1 of the existing rail welding head is to process a groove on the upsetting shaft 1 as a positioning surface, install a snap ring on the groove surface, and then connect between the upsetting shaft 1 and the moving frame wedge clamp 2 by means of flange pressing or nut pressing. The connection mode has a relatively small contact surface of the snap ring and a relatively large bearing pressure, which is prone to deformation and generate gaps after being stressed, thus affecting the stability of the rail welding head. After the snap ring is deformed, the wear of the insulation parts of the upsetting shaft is aggravated and fails, and there is a risk of short circuit between the moving frame wedge clamp 2 and the upsetting shaft 1. To solve this problem, as Figure 1 and Figure 2 shown, the embodiment of the present invention proposes an insulating connection structure, which is connected between one end of the upsetting shaft 1 and the clamp 2, and includes a locking nut 3 and an insulating connection assembly 4; wherein, the locking nut 3 is connected to the middle of one end of the upsetting shaft 1, and the insulating connection assembly 4 is coated outside the locking nut 3 and the position where the upsetting shaft 1 is connected to the clamp 2.

[0017] The insulating connection structure of the present upsetting shaft 1 uses the cooperation of the locking nut 3 and the insulating connection assembly 4 to make the contact area between the insulating connection assembly 4 and the upsetting shaft 1 relatively large, so the pressure received is relatively small, thus it is not easily worn and damaged, improving the insulation reliability between the clamp 2 and the upsetting shaft 1 and reducing the short circuit risk.

[0018] To better understand this solution, the following will further optimize the structure of the insulating connection assembly 4 and other structures.

[0019] As Figure 2 shown, according to another embodiment of the present invention, for the insulating connection structure, the insulating connection assembly 4 forms a multi-turn structure to be connected between the upsetting shaft 1 and the clamp 2; to reasonably arrange the insulating connection assembly 4 between the upsetting shaft 1 and the clamp 2, ensuring better insulation performance between the upsetting shaft 1 and the clamp 2.

[0020] Based on the above solution:

[0021] The insulating connection assembly 4 includes a upsetting shaft insulating pad 41, a upsetting shaft insulating ring 42, a nut insulating pad 43, and a nut insulating sheath 44. Among them, the upsetting shaft insulating pad 41 is sleeved on the upsetting shaft 1 and abuts between the inner wall of the clamp 2 and the outer wall of the large head of the upsetting shaft 1. The upsetting shaft insulating ring 42 is sleeved on the upsetting shaft 1 and abuts against the inner wall of the mounting hole on the clamp 2 through which the upsetting shaft 1 passes. One end of the upsetting shaft insulating ring 42 is connected to the upsetting shaft insulating pad 41. The nut insulating pad 43 is sleeved on the upsetting shaft 1, and one side thereof abuts against the outer wall of the clamp 2 and is also connected to the other end of the upsetting shaft insulating ring 42. The other side of the nut insulating pad 43 abuts against one end face of the locking nut 3. The nut insulating sheath 44 is sleeved on the outside of the locking nut 3, and one end thereof is connected to the nut insulating pad 43, and the other end is connected to the outer wall of the upsetting shaft 1.

[0022] Through the cooperation of the upsetting shaft insulating pad 41, the upsetting shaft insulating ring 42, the nut insulating pad 43, and the nut insulating sheath 44, an insulating connection assembly 4 is formed to insulate between the outside of the upsetting shaft 1 and the locking nut 3 and the clamp 2, and ensure better insulation strength between the upsetting shaft 1 and the clamp 2.

[0023] Further, one end of the upsetting shaft insulating ring 42 is connected to the inner ring of the upsetting shaft insulating pad 41, and the other end is connected to the inner ring of the nut insulating pad 43. One end of the nut insulating sheath 44 is connected to the middle of one side of the nut insulating pad 43. The upsetting shaft insulating pad 41, the upsetting shaft insulating ring 42, the nut insulating pad 43, and the nut insulating sheath 44 are connected in sequence to form a multi-turn structure.

[0024] Among them, the nut insulating sheath 44 includes a covering sleeve section and an end head plate section. The covering sleeve section is sleeved on the outside of the locking nut 3 for fitting, and one end thereof is connected to the outer ring of the nut insulating pad 43. The end head plate section is connected to the end of the covering sleeve section away from the cooperation with the nut insulating pad 43, and a through hole for the upsetting shaft 1 to pass through is opened in the middle thereof. The end head plate section is attached to the locking nut 3, and the inner wall of the through hole is in contact with the outer wall of the upsetting shaft 1.

[0025] Here, the nut insulating sheath 44 is composed of a covering sleeve section and an end head plate section, and cooperates with the nut insulating pad 43 to completely cover the outside of the locking nut 3 to improve the insulation strength.

[0026] The installation of the insulating connection structure of the upsetting shaft 1 is as follows:

[0027] First, install the upsetting shaft insulating pad 41 and the upsetting shaft insulating ring 42 at the corresponding positions on the large head end of the upsetting shaft 1. Then, pass the small head end of the upsetting shaft 1 through the clamp 2. The large head end of the upsetting shaft 1 is limited inside the clamp 2. The upsetting shaft insulating ring 42 abuts against the inner wall of the clamp 2, and the upsetting shaft insulating pad 41 is in contact with the inner wall of the mounting hole on the upsetting shaft 1.

[0028] Then, a nut insulating pad 43, a lock nut 3, and a nut insulating sheath 44 are sequentially installed from the small head end of the upsetting shaft 1.

[0029] As Figure 1 shown, according to another embodiment of the present invention, the welding machine head includes an upsetting shaft 1 and a clamp 2, and further includes an insulating connection structure of the upsetting shaft 1 as described in any one of the above between the upsetting shaft 1 and the clamp 2. Based on the advantages of the above insulating connection structure of the upsetting shaft 1.

[0030] Furthermore, the welding machine head further includes an upsetting oil cylinder 5. The piston rod of the upsetting oil cylinder 5 is threadedly connected to the small head end of the upsetting shaft 1, and a piston seal sleeve 6 is provided between the piston rod and the small head end of the upsetting shaft 1.

[0031] After the installation between the upsetting shaft 1 and the clamp 2 is completed, first, a piston seal sleeve 6 is sleeved on the piston rod of the upsetting oil cylinder 5, and then the piston rod of the upsetting oil cylinder 5 is screwed into the installation groove opened at the small head end of the upsetting shaft 1, so as to facilitate and quickly install the upsetting shaft 1.

[0032] In this embodiment, other structures in the welding machine head can refer to the corresponding structures in CN117961244A.

[0033] According to another embodiment of the present invention, the rail flash welding machine includes the welding machine head described in any one of the above embodiments, and has the advantages of the welding machine head; in this embodiment, other structures in the rail flash welding machine can refer to the corresponding structures in CN117961244A.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An insulating connection structure, which is connected between one end of the upset shaft and the clamp, characterized in that: include: A locking nut connected to the middle of one end of the upset shaft; The insulating connection component is covered outside the locking nut and the position where the upsetting shaft is connected with the clamp.

2. An insulating connection structure according to claim 1, characterized in that: The insulating connection assembly forms a multiple-bending structure to connect between the upset shaft and the clamp.

3. An insulating connection structure according to claim 1 or 2, characterized in that: The insulating connection assembly comprises: An insulating pad for the upsetting shaft, wherein the insulating pad for the upsetting shaft is sleeved on the upsetting shaft and abuts against an inner side wall of the clamp and an outer wall of the large end of the upsetting shaft; An insulating ring of the upsetting shaft, wherein the insulating ring is sleeved on the upsetting shaft and abuts against the inner wall of the mounting hole on the clamp through which the upsetting shaft passes, and one end of the insulating ring of the upsetting shaft is connected to an insulating pad of the upsetting shaft; A nut insulating washer is sleeved on the upset shaft and one side of the nut insulating washer abuts against the outer wall of the clamp and is also connected to the other end of the upset shaft insulating ring, and the other side of the nut insulating washer abuts against one end face of the locking nut; The nut insulating sheath is sleeved on the outside of the locking nut and one end of the nut insulating sheath is connected to the nut insulating pad, and the other end of the nut insulating sheath is connected to the outer wall of the top forging shaft.

4. An insulating connection structure according to claim 3, characterized in that: One end of the upsetting shaft insulating ring is connected to the inner ring of the upsetting shaft insulating pad, and the other end is connected to the inner ring of the nut insulating pad.

5. An insulating connection structure according to claim 3, characterized in that: One end of the nut insulating sheath is connected to the middle part of a side surface of the nut insulating pad.

6. An insulating connection structure according to claim 3, characterized in that: The nut insulating sheath comprises: A covering sleeve section, wherein the covering sleeve section is sleeved on the outside of the locking nut to fit the locking nut and one end of the covering sleeve section is connected to the outer ring of the nut insulating washer; The end plate section is connected to the end of the covering sleeve section away from the nut insulating pad and has a through hole in the middle for the upsetting shaft to pass through. The end plate section is attached to the locking nut and the inner wall of the through hole fits with the outer wall of the upsetting shaft.

7. A welding machine head, comprising an upset shaft and a clamp, characterized in that: It also includes an insulating connection structure as described in any one of claims 1-6 connected between the upset shaft and the clamp.

8. A welding machine head according to claim 7, characterized in that: It also includes an upsetting oil cylinder, a piston rod of which is threadedly connected to the small end of the upsetting shaft, and a piston sealing sleeve is arranged between the piston rod and the small end of the upsetting shaft.

9. A rail flash welding machine, characterized in that: It comprises a welding machine head as described in claim 7 or 8.

Images