Device for eliminating meshing clearance between worm gear and worm of welding gun oscillator

Abstract

The utility model discloses a welding gun oscillator worm gear and worm meshing clearance eliminating device which comprises a worm gear and worm pair arranged on a reduction gearbox shell, a motor is connected with a worm, a welding gun clamping frame is connected with one end of a worm gear shaft, and a clearance eliminating device is arranged between the other end of the worm gear shaft and the reduction gearbox shell. The clearance eliminating device specifically comprises a spring supporting seat, a spring locking shaft penetrates through a central through hole in the spring supporting seat to be connected to the other end of the worm wheel shaft, a pin is arranged on the spring supporting seat, one end of a clockwork spring is connected to the pin, and the other end of the clockwork spring is connected to the end of the spring locking shaft. During installation, the clockwork spring has certain pre-tightening force, and the clockwork spring always keeps enough pre-tightening force after the worm wheel shaft swings during welding, so that when the worm drives the worm wheel to swing, the meshing gap between the worm wheel and the worm is kept in one direction due to the action of the spring force, the swing angle of the welding gun is more accurate, and the welding quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a welding gun swing device, especially to a welding gun arc swing device of automatic welding equipment belongs to welding equipment technical field. BACKGROUND

[0002] For welding equipment, in order to guarantee the penetration, the uniformity of welding angle and the beauty of weld surface forming of large groove, wide weld seam welding and thick steel plate deep weld seam welding, the welding gun needs to swing, that is, the welding gun swings in arc around a point;

[0003] Especially in automatic welding, the welding gun needs to be fixed on the welding gun swing device, and in the specific use process, the welding gun is fixed on the clamping device of the welding gun swing device, the driving force generated by the driver is transmitted to the clamping device through the transmission structure, so that the clamping device swings, the welding gun swing device drives the clamping device to swing, and the welding gun on the welding gun swing device swings synchronously.

[0004] At present, the welding gun swing device of automatic welding equipment mostly adopts a worm gear reducer, such as the arc swing device for welding disclosed in 201721237420.7, which comprises a support, a welding gun, a DC motor, a worm gear reducer, an encoder and a welding gun clamping frame. The DC motor is connected with the worm shaft of the worm gear reducer, the encoder is connected with the worm gear reducer, the welding gun clamping frame is fixed on the worm output shaft of the worm gear reducer, and the welding gun is fixed on the welding gun clamping frame. Since the worm gear pair has a transmission gap, the weld quality is not ideal. Although the worm gear reducer in the prior art has a worm gear pair without a gap, the gap can only be reduced as much as possible by adjusting the meshing of the worm gear pair, and the gap cannot be completely eliminated. Even if the transmission gap is controlled in a very small range through high-precision machining, the gap will inevitably be generated after wear in the use process. The existing gap in the welding process will cause the welding gun to swing at an inaccurate angle or to slightly swing due to the unbalanced weight of the welding cable and the like when it is not necessary to swing, thereby affecting the welding quality. SUMMARY

[0005] The utility model discloses a kind of elimination devices of worm gear engagement gap of welding gun swing device, to solve the problems in the background art.

[0006] The technical scheme adopted by the utility model to achieve the above-mentioned purposes is as follows:

[0007] A kind of elimination device of worm gear engagement gap of welding gun swing device, including motor, welding gun clamping frame and worm gear pair rotationally connected on the shell of speed reducer, motor is connected with worm, welding gun clamping frame is connected with one end of worm shaft, welding gun is fixed on welding gun clamping frame, it is characterized by: elimination gap device is equipped between the other end of worm shaft and the shell of speed reducer.

[0008] The elimination device of the meshing gap between the worm and the worm wheel of the welding gun swing device comprises a clock spring, a pin, a spring locking shaft, and a spring support seat,

[0009] The spring support seat is fixed on the reduction box shell and located on the side opposite to the welding gun holder,

[0010] The spring locking shaft is connected to the other end of the worm wheel shaft through the center through hole on the spring support seat,

[0011] The spring support seat is provided with a pin,

[0012] One end of the clock spring is connected to the pin, and the other end is connected to the end of the spring locking shaft.

[0013] By adopting the above technical scheme, the clock spring is arranged between the worm wheel shaft and the reduction box shell, and has a certain pre-tightening force during installation, and the clock spring always maintains sufficient pre-tightening force after the welding swing, so that the meshing gap between the worm and the worm wheel is kept in one direction due to the spring force when the worm drives the worm wheel to swing, and the swing angle of the welding gun is more accurate, which is beneficial to improving the welding quality.

[0014] Further, the worm wheel shaft is a hollow shaft, the left end of the welding gun holder is a left half shaft, and the right end of the spring locking shaft is a right half shaft, the left half shaft and the right half shaft are inserted into the inner hole of the hollow shaft from both ends and matched with the inner hole; the spring locking shaft has a center through hole, a coupling bolt is inserted into the center through hole, and the threaded part of the coupling bolt is screwed with the center screw hole on the left half shaft of the welding gun holder.

[0015] Further, the inner hole of the hollow shaft is provided with a first key groove, the left half shaft is provided with a second key groove, the right half shaft is provided with a third key groove, a first connecting key is arranged between the first key groove and the second key groove, and a second connecting key is arranged between the first key groove and the third key groove.

[0016] In the above-mentioned elimination device of the meshing gap between the worm and the worm wheel of the welding gun swing device, the left end of the spring locking shaft is provided with a radial groove, and the other end of the clock spring is clamped in the groove.

[0017] In the above-mentioned elimination device of the meshing gap between the worm and the worm wheel of the welding gun swing device, the spring support seat is in the shape of a box body with a center through hole at the bottom, the mouth of the box body is provided with a stepped hole, the diameter of the stepped hole is larger than the inner diameter of the box body, the side wall of the stepped hole is provided with an annular groove, a cover plate is arranged in the stepped hole, and a hole retainer ring is arranged in the annular groove to fix the cover plate. Advantages

[0018] The utility model discloses a technical scheme, set up spring between worm shaft and reduction gearbox casing, when installing make spring have certain pre -tension, and make worm shaft always keep enough pre -tension after welding swing, so when the worm drive worm wheel swings, the meshing gap between worm wheel worm is kept in a direction due to the action of spring force, make the swing angle of welding torch more accurate, improve the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1, 2 is the axle side schematic diagram of the utility model.

[0020] Fig. 3 is the schematic diagram of motor, worm, worm wheel in the utility model.

[0021] Fig. 4 is the schematic diagram of worm, worm wheel, clearance elimination device in the utility model.

[0022] Fig. 5 is the axle side schematic diagram of clearance elimination device in the utility model.

[0023] In the drawing: 1 motor, 2 first bolt, 3 welding torch holder, 4 second bolt, 5 worm bearing gland, 6 reduction gearbox casing, 7 clearance elimination device, 7-1 hole with baffle, 7-2 spring seat cover plate, 7-3 spring, 7-4 spring locking shaft, 7-5 column pin, 7-6 spring support seat, 8 worm bearing gland, 9 third bolt, 10 fourth bolt, 11 motor mounting plate, 12 worm bearing a, 13 worm, 14 worm bearing b, 15 gasket, 16 coupling bolt, 17-1 worm bearing, 17-2 worm bearing, 18 second connecting key, 19-1 bearing gasket, 19-2 bearing gasket, 20 worm wheel, 21 first connecting key, 22 sixth bolt. DETAILED DESCRIPTION

[0024] In order to clearly illustrate the technical features of the scheme, the utility model will be further described below through non - limited example and in conjunction with the drawings.

[0025] The front, rear, left and right directions described in the utility model are described according to the front, rear, left and right directions shown in the drawings. For the convenience of description, only the part related to the embodiment of the utility model is shown.

[0026] Please refer to Figures 1 to 5The application discloses a device for eliminating the meshing gap of a worm and a gear of a welding gun swing device, which comprises a motor 1, a welding gun holder 3 and a worm and gear pair rotatably connected to a reduction box shell 6, wherein the motor 1 is connected with a worm, the welding gun holder 3 is connected with one end of a worm shaft, and the welding gun is fixed on the welding gun holder 3.

[0027] Please refer to Figure 3 The worm 13 is rotatably connected to the reduction box shell 6 through worm shaft bearings a12 and b14 at both ends, one end of the worm is connected with the shaft end of the motor 1, and the other end of the worm is sealed through a worm bearing gland 8 connected to the reduction box shell 6 through a third bolt 9.

[0028] Please refer to Figure 4 In the embodiment, the worm 20 and the worm shaft are in an integrated structure, the worm shaft is rotatably connected to the reduction box shell 6 through worm shaft bearings 17-1 and 17-2, bearing spacers 19-1 and 19-2 are respectively arranged between the worm shaft and the worm 20, between the worm shaft bearing 17-1 and the worm 20 and between the worm shaft bearing 17-2 and the worm 20, worm bearing glands 5 are respectively arranged at the outer sides of the worm shaft bearings 17-1 and 17-2, and the two worm bearing glands 5 are respectively fixed on the shell through the second bolt 4 and the sixth bolt 22.

[0029] The other end of the worm shaft (namely, the end opposite to the welding gun holder 3) is provided with a gap eliminating device between the worm shaft and the reduction box shell 6. The gap eliminating device 7 comprises a clock spring 7-3, a pin 7-5, a spring locking shaft 7-4 and a spring support seat 7-6.

[0030] The spring support seat 7-6 is in a box body shape with a central through hole at the bottom, is fixedly connected (welding can be adopted, or the spring support seat 7-6 and the worm bearing gland 5 at the left end are integrally machined and formed) on the worm bearing gland 5 at the left end, is indirectly fixed on the reduction box shell 6 and located at the side opposite to the welding gun holder 3.

[0031] In the embodiment, the worm shaft is a hollow shaft, the left end of the welding torch holder 3 is a left half shaft, the right end of the spring locking shaft 7-4 is a right half shaft, the left half shaft is inserted into the inner hole of the hollow shaft from the right end and matched with the inner hole, and the right half shaft is inserted into the inner hole of the hollow shaft from the left end and matched with the inner hole; the spring locking shaft 7-4 has a center through hole, a coupling bolt 16 is inserted into the center through hole, the threaded part of the coupling bolt 16 is screwed with the center threaded hole on the left half shaft of the welding torch holder 3, and the welding torch holder 3 and the spring locking shaft 7-4 are fastened together. The inner hole of the hollow shaft is provided with a first key groove; the left half shaft is provided with a second key groove, and the right half shaft is provided with a third key groove, a first connecting key 21 is arranged between the first key groove and the second key groove, and a second connecting key 18 is arranged between the first key groove and the third key groove.

[0032] The spring support seat 7-6 is in the form of a box body with a center through hole at the bottom, the box body is fixedly connected with a column pin 7-5 at the edge close to the bottom, the left end of the spring locking shaft 7-4 is provided with a radial groove, one end of the clock spring 7-3 is connected to the column pin 7-5, and the other end of the clock spring 7-3 is clamped in the groove. The mouth of the box body of the spring support seat 7-6 is provided with a stepped hole, the diameter of the stepped hole is greater than the inner diameter of the box body, the side wall of the stepped hole is provided with an annular groove, the spring seat cover plate 7-2 is arranged in the stepped hole, and the hole stop ring 7-1 is arranged in the annular groove to fix the spring seat cover plate 7-2.

[0033] In the description of the utility model, it should be explained that the terms "left", "right", "front", "back", "up", "down", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and the above terms are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] Unless otherwise explicitly specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In addition to the technical features described in the specification, they are known to those skilled in the art.

[0036] The above-mentioned embodiments are only used for understanding the present application, and are not intended to limit the technical solutions described in the present application. Based on the technical solutions described in the claims, those skilled in the related art can make various changes or modifications. All equivalent changes or modifications should be covered within the protection scope of the claims of the present application.

Claims

1. A device for eliminating the meshing gap of the worm and gear pair of a welding gun wiggler, comprising a motor, a welding gun holder and a worm and gear pair rotatably connected to a reduction box shell, the motor being connected to the worm, the welding gun holder being connected to one end of the worm shaft, and the welding gun being fixed to the welding gun holder, characterized in that: The other end of the worm shaft is provided with a gap elimination device between the worm shaft and the reduction gearbox shell; ​ The gap elimination device comprises a clock spring, a pin, a spring locking shaft, and a spring support seat, The spring support seat is fixed on the reduction gearbox shell and located on the side opposite to the welding torch holder, The spring locking shaft is connected to the other end of the worm shaft through the center through hole on the spring support seat, The spring support seat is provided with a pin, One end of the clock spring is connected to the pin, and the other end is connected to the end of the spring locking shaft.

2. The device of claim 1, wherein: The worm shaft is a hollow shaft, the left end of the welding torch holder is a left half shaft, and the right end of the spring locking shaft is a right half shaft. The left half shaft and the right half shaft are inserted into the inner hole of the hollow shaft from both ends and cooperate with the inner hole. The spring locking shaft has a center through hole, a coupling bolt is inserted into the center through hole, and the threaded part of the coupling bolt is screwed with the center screw hole on the left half shaft of the welding torch holder.

3. The device of claim 2, wherein: The inner hole of the hollow shaft is provided with a first key groove, the left half shaft has a second key groove, and the right half shaft has a third key groove. A first connecting key is arranged between the first key groove and the second key groove, and a second connecting key is arranged between the first key groove and the third key groove.

4. The device of claim 1, wherein: The left end of the spring locking shaft is provided with a radial groove, and the other end of the clock spring is clamped in the groove.

5. The device of claim 1, wherein: The spring support seat is in the shape of a box body with a center through hole at the bottom. The mouth of the box body is provided with a stepped hole, the diameter of the stepped hole is larger than the inner diameter of the box body, the side wall of the stepped hole is provided with an annular groove, a cover plate is arranged in the stepped hole, and a hole retainer ring is arranged in the annular groove to fix the cover plate.

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