Rotating shaft structure capable of conducting large current

Abstract

The utility model discloses a rotating shaft structure capable of conducting large current, which comprises an outer shaft body, the upper end of the outer shaft body is provided with a mounting groove, the inner bottom of the mounting groove is provided with an inner groove, the mounting groove is internally provided with a first bearing, the inner bottom of the inner groove is provided with a second bearing, the second bearing is internally provided with an inner shaft body, and the inner shaft body is internally provided with a second bearing. The upper end of the inner shaft body penetrates through the first bearing, an inner shaft copper bar connecting piece is arranged on the outer wall of the inner shaft body, an outer shaft copper bar connecting piece is arranged on the outer wall of the outer shaft body, a compensation block is arranged in the inner groove, and the compensation block is elastically connected with the inner bottom of the inner groove through a spring. According to the structure, on the premise that the rotation flexibility and the rotation range of the joint arm are not affected, large current can be transmitted, gaps caused by abrasion can be automatically compensated, the stability of current transmission is guaranteed, meanwhile, the conductive liquid is arranged, rotation of the rotating shaft is more flexible, and the conductive efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic welding, in particular to a rotating shaft structure capable of conducting large current. Background Art

[0002] During the process of automatic welding, it is usually necessary to use wires for current transmission. However, in the actual use process, the current transmitted by wires is small. And since a robotic arm is usually used during the automatic welding process, a rotating shaft mechanism needs to be installed. The existing rotating shaft mechanism transmits a small current and cannot meet the current magnitude required for resistance welding. Moreover, when the rotating shaft mechanism is worn, the gap between the inner and outer shafts cannot be automatically compensated, the wire efficiency is low. At the same time, when the existing rotating shaft mechanism is installed on structures such as joint arms, it will affect the rotational flexibility and rotational range of the joint arm. Therefore, it is necessary to design a rotating shaft structure capable of conducting large current to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the defects existing in the prior art, and a rotating shaft structure capable of conducting large current is proposed. This structure can transmit a larger current without affecting the rotational flexibility and rotational range of the joint arm, can automatically compensate for the gap caused by wear, etc., ensure the stability of current transmission, and at the same time, a conductive liquid is provided to make the rotation of the rotating shaft more flexible and improve the conductive efficiency.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A rotating shaft structure capable of conducting large current includes an outer shaft body. An installation groove is provided at the upper end of the outer shaft body. An inner groove is installed at the inner bottom of the installation groove. A first bearing is installed in the installation groove. A second bearing is installed at the inner bottom of the inner groove. An inner shaft body is installed in the second bearing. The upper end of the inner shaft body penetrates through the first bearing. An inner shaft copper row connector is provided on the outer wall of the inner shaft body. An outer shaft copper row connector is provided on the outer wall of the outer shaft body. A compensation block is provided in the inner groove. The compensation block is elastically connected to the inner bottom of the inner groove through a spring.

[0006] Preferably, the inner groove is filled with a conductive liquid.

[0007] Preferably, an end cover is sleeved on the outer wall of the inner shaft body. A plurality of through holes are provided on the end cover. Bolts are provided in the plurality of through holes. A plurality of first threaded holes are provided at the upper end of the outer shaft body.

[0008] Preferably, a sealing ring is provided between the outer wall of the inner shaft body and the inner wall of the inner groove.

[0009] Preferably, a plurality of second threaded holes are provided on the outer shaft copper busbar connector, and a plurality of third threaded holes are provided on the inner shaft copper busbar connector.

[0010] Preferably, a plurality of jacks are provided on both the outer shaft copper busbar connector and the inner shaft copper busbar connector.

[0011] Compared with the existing technology, the advantages of this device are as follows:

[0012] 1. Compared with the existing technology, through the setting of the inner shaft and the outer shaft, without affecting the rotation flexibility and rotation range of the articulated arm, the outer shaft copper busbar connector and the inner shaft copper busbar connector can transmit a large current.

[0013] 2. Compared with the existing technology, through the setting of the compensation block and the spring, the gap generated between the inner shaft and the outer shaft due to wear can be automatically compensated, thereby ensuring the stability of current transmission.

[0014] 3. Compared with the existing technology, through the setting of the conductive liquid, the rotation of the rotating shaft can be made more flexible, thereby greatly improving the conductive efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a rotating shaft structure capable of conducting large current proposed by the present utility model;

[0016] Figure 2 is Figure 1 a schematic structural diagram from another perspective;

[0017] Figure 3 is Figure 1 a sectional view of.

[0018] In the figure: 1 outer shaft body, 2 outer shaft copper busbar connector, 3 inner shaft copper busbar connector, 4 inner shaft body, 5 end cover, 6 first bearing, 7 sealing ring, 8 second bearing, 9 conductive liquid, 10 compensation block, 11 first threaded hole, 12 second threaded hole, 13 third threaded hole, 14 jack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0020] Refer to Figures 1 - 3, a rotating shaft structure capable of conducting large currents, comprising an outer shaft body 1. An installation groove is provided at the upper end of the outer shaft body 1. An inner groove is installed at the inner bottom of the installation groove. A first bearing 6 is installed in the installation groove. A second bearing 8 is installed at the inner bottom of the inner groove. An inner shaft body 4 is installed in the second bearing 8. The upper end of the inner shaft body 4 penetrates through the first bearing 6. An inner shaft copper bus connection member 3 is provided on the outer wall of the inner shaft body 4. An outer shaft copper bus connection member 2 is provided on the outer wall of the outer shaft body 1. A compensation block 10 is provided in the inner groove. The compensation block 10 is elastically connected to the inner bottom of the inner groove by a spring. The lower end of the inner shaft body 4 has a certain taper, and at the same time, the taper of the compensation block 10 is the same as that of the inner shaft body 4.

[0021] Among them, the inner groove is filled with a conductive liquid 9. It is also possible to use conductive grease to fill the gap between the inner shaft body 4 and the outer shaft body 1. An end cover 5 is sleeved on the outer wall of the inner shaft body 4. Multiple through holes are provided on the end cover 5. Bolts are provided in the multiple through holes. Multiple first threaded holes 11 are provided at the upper end of the outer shaft body 1.

[0022] Among them, a sealing ring 7 is provided between the inner shaft body 4 and the inner wall of the inner groove, thereby avoiding conductive heat leakage.

[0023] Among them, multiple second threaded holes 12 are provided on the outer shaft copper bus connection member 2. Multiple third threaded holes 13 are provided on the inner shaft copper bus connection member 3. Multiple jacks 14 are provided on both the outer shaft copper bus connection member 2 and the inner shaft copper bus connection member 3.

[0024] The functional principle of the present utility model can be described through the following operation method: During installation, the device is installed on the articulated arm, and then multiple wires are inserted into the corresponding jacks 14, so that stable current transmission can be carried out when the articulated arm is running;

[0025] When wear occurs between the inner shaft body 4 and the outer shaft body 1 due to continuous relative movement, the compensation block 10 moves upward under the action of the spring, automatically compensating for the gap between the inner shaft body 4 and the outer shaft body 1.

[0026] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A rotating shaft structure capable of conducting large currents, comprising an outer shaft body (1), characterized in that: An installation groove is provided at the upper end of the outer shaft body (1). An inner groove is installed at the inner bottom of the installation groove. A first bearing (6) is installed in the installation groove. A second bearing (8) is installed at the inner bottom of the inner groove. An inner shaft body (4) is installed in the second bearing (8). The upper end of the inner shaft body (4) penetrates through the first bearing (6). An inner shaft copper bus connection member (3) is provided on the outer wall of the inner shaft body (4). An outer shaft copper bus connection member (2) is provided on the outer wall of the outer shaft body (1). A compensation block (10) is provided in the inner groove. The compensation block (10) is elastically connected to the inner bottom of the inner groove through a spring.

2. The shaft structure capable of conducting large current according to claim 1, wherein: A conductive liquid (9) is filled in the inner groove.

3. The rotating shaft structure capable of conducting large current according to claim 1, wherein: An end cover (5) is sleeved on the outer wall of the inner shaft body (4). A plurality of through holes are provided on the end cover (5). Bolts are provided in the plurality of through holes. A plurality of first threaded holes (11) are provided at the upper end of the outer shaft body (1).

4. A rotating shaft structure capable of conducting large current according to claim 1, characterized in that: A sealing ring (7) is provided between the inner shaft body (4) and the inner wall of the inner groove.

5. The shaft structure capable of conducting large current according to claim 1, wherein: A plurality of second threaded holes (12) are provided on the outer shaft copper bus connection member (2). A plurality of third threaded holes (13) are provided on the inner shaft copper bus connection member (3).

6. The shaft structure capable of conducting large current according to claim 1, wherein: A plurality of jacks (14) are provided on both the outer shaft copper bus connection member (2) and the inner shaft copper bus connection member (3).

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