Welding device for machining of planetary reducer

Abstract

The invention discloses a welding device for machining a planetary reducer, and belongs to the technical field of planetary reducers. The planetary reducer comprises a shell and a gear ring mounted in the shell; the welding device comprises a rack used for horizontally supporting the shell and the gear ring, a rotation driving device installed on the lower portion of the rack and a center rotating shaft connected with the output end of the rotation driving device, the center rotating shaft is connected with a center gear, a welding assembly and an outer circumference cooling piece at the same time, and a support is rotationally installed on the outer side of the center rotating shaft. A cooling tooth bag is rotationally installed on the support and is made into a gear shape through an elastic material, a cavity filled with cooling liquid is formed in the inner side of the cooling tooth bag, the cooling tooth bag can be meshed with the gear ring and the center gear at the same time, and the center gear can drive the cooling tooth bag to rotate around the axis of the center gear ring while rotating. According to the device, cooling can be conducted in a targeted mode, meanwhile, the cooling cost is saved, and the problem of thermal deformation of the gear ring in the welding process is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of planetary speed reducers, and particularly relates to a welding device for processing planetary speed reducers. Background Art

[0002] As a precision transmission device, planetary speed reducers are widely used in fields such as industrial robots, aerospace, and precision machine tools. The accuracy and strength of the core component, the gear ring, directly affect the performance and service life of the speed reducer. During the processing of planetary speed reducers, the gear ring and the housing are usually welded. The heat generated during the welding process will cause the material to expand and contract thermally, which easily leads to deformation of the gear ring. The deformation of the gear ring will directly affect the gear meshing accuracy, resulting in increased noise, reduced transmission efficiency, and even affecting the service life of the speed reducer. At the same time, during the welding process, the materials of the gear ring and the housing will undergo microstructural changes at high temperatures, forming a heat-affected zone. The heat-affected zone of the gear ring may cause uneven hardness of the gear tooth surface, affecting wear resistance and service life. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a welding device for processing planetary speed reducers, which can solve the above technical problems.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A welding device for processing planetary speed reducers disclosed by the present invention, the planetary speed reducer includes a housing and a gear ring installed in the housing. The welding device includes a frame for horizontally supporting the housing and the gear ring, a rotational driving device installed at the lower part of the frame, and a central rotating shaft connected to the output end of the rotational driving device. The central rotating shaft is simultaneously connected with a central gear, a welding assembly, and an outer circumferential cooling member. A bracket is rotatably installed on the outer side of the central rotating shaft; a cooling tooth sac is rotatably installed on the bracket. The cooling tooth sac is made of an elastic material in a gear shape. The inner side of the cooling tooth sac forms a cavity filled with a coolant. The cooling tooth sac can be meshed with both the gear ring and the central gear at the same time. The central gear can drive the cooling tooth sac to rotate self and rotate around the axis of the central gear ring.

[0005] Further, a hollow cooling shaft is rotatably installed at the center of the cooling tooth sac. The lower end of the cooling shaft is fixedly connected to the bracket. The inner side of the cooling shaft is separated by a partition into a first infusion area and a second infusion area. The outer circumferential surface of the first infusion area is provided with a first through hole communicating with the cavity. The outer circumferential surface of the second infusion area is provided with a second through hole communicating with the cavity. The upper ends of the first infusion area and the second infusion area are connected with a first infusion pipe and a second infusion pipe respectively. The ends of the first infusion pipe and the second infusion pipe away from the cooling shaft are connected to a cooling box.

[0006] Further, air bags are installed on both the first infusion tube and the second infusion tube, and the installation of the air bags can accelerate the flow of the coolant in the cavity.

[0007] Further, a rotating gear is rotatably installed on the bracket at the same time. A central column is coaxially installed in the central hole of the rotating gear. The central column is fixed to the bracket. A cam is installed inside the rotating gear. The air bag is located in the central hole of the rotating gear.

[0008] Further, a shaping gear is rotatably installed on the bracket at the same time. The shaping gear meshes with the toothed ring and the central gear at the same time. The shaping gear, the rotating gear and the cooling tooth bag are evenly distributed on the outer circumference of the central rotating shaft.

[0009] Further, a nut is threadedly connected to the outer side of the cooling shaft. The nut is located outside the cooling tooth bag. By rotating the nut, the cooling tooth bag can be pressed downwards. The cooling tooth bag is in contact with the nut and the bracket through balls respectively.

[0010] Further, the outer circumferential cooling member includes a first hoop, a first vertical beam, a first cross beam, a first slide rail, a first displacement driving device, a suspension rod and a water outlet cylinder. The first hoop is connected to the central rotating shaft. The first hoop is connected to the first vertical beam. The first vertical beam is connected with a first cross beam. A first slide rail is slidably fitted on the first cross beam. A first displacement driving device for driving the first slide rail to slide along the first cross beam is installed on the first cross beam. The outer end of the first slide rail is connected with a water outlet cylinder through a suspension rod.

[0011] Further, the water outlet cylinder includes an inner cylinder and an outer cylinder. The upper end of the inner cylinder is fixedly connected with the suspension rod. First water outlet holes are formed on the surface of the inner cylinder. The outer cylinder is rotatably installed outside the inner cylinder. Second water outlet holes corresponding to the first water outlet holes are formed on the outer cylinder. The surface of the outer cylinder is in contact with the outer side of the housing.

[0012] Further, the welding assembly includes a second hoop, a second vertical beam, a second cross beam, a second slide rail, a second displacement driving device, a welding head, a welding bracket and a third displacement driving device. The second hoop is connected to the central rotating shaft. The second hoop is connected to the second vertical beam. The second vertical beam is connected with a second cross beam. A second slide rail is slidably fitted on the second cross beam. A second displacement driving device for driving the second slide rail to slide along the second cross beam is installed on the second cross beam. The outer end of the second slide rail is fixedly connected with a welding bracket. A third displacement driving device is installed on the welding bracket. The third displacement driving device can drive the welding head to displace vertically.

[0013] The beneficial effects of the present invention are as follows: A welding device for the processing of a planetary reducer disclosed by the present invention. The outer circumferential cooling member and the cooling tooth sac respectively cool the outer side and the inner side of the gear ring as they rotate along with the central rotating shaft. While cooling specifically, it saves the cooling cost and reduces the thermal deformation problem of the gear ring during the welding process.

[0014] In the device disclosed by the present invention, since the cooling tooth sac is designed in a gear shape, through the cooperation of teeth, it can penetrate deeper into the inner teeth of the gear ring to cool the gear ring, avoiding the problem of tooth profile deformation. The central gear can drive the cooling tooth sac to rotate around the axis of the central gear ring, enabling all-round circumferential cooling of the gear ring. The cooling tooth sac itself can also rotate, engaging and cooling alternately, which can enhance the cooling effect.

[0015] In the device disclosed by the present invention, cooling and welding can be carried out simultaneously, reducing the power source, saving energy consumption, being simpler to control, more uniform in cooling, and more stable in the operation of the structure.

[0016] Other advantages, objectives, and features of the present invention will be elaborated in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a schematic structural diagram of the welding device of the present invention; Figure 2 It is a top view of the welding device of the present invention; Figure 3 It is a schematic structural diagram of the cooling tooth sac; Figure 4 It is a cross-sectional view of the cooling tooth sac; Figure 5 It is a schematic structural diagram of the outer circumferential cooling member; Figure 6 It is a schematic structural diagram of the water outlet cylinder; Figure 7 It is a schematic structural diagram of the welding assembly.

[0018] The markings in the attached drawings are as follows: housing 1, gear ring 2, frame 3, rotational drive device 4, central rotating shaft 5, central gear 6, welding assembly 7, outer circumferential cooling member 8, bracket 9, cooling tooth sac 10, cooling shaft 11, first infusion area 12, second infusion area 13, first through hole 14, second through hole 15, first infusion pipe 16, second infusion pipe 17, airbag 18, rotating tooth 19, central column 20, cam 21, shaping tooth 22, nut 23, ball 24, first hoop 25, first vertical beam 26, first cross beam 27, first slide rail 28, first displacement drive device 29, suspension rod 30, water outlet cylinder 31, inner cylinder 32, outer cylinder 33, first water outlet hole 34, second water outlet hole 35, second hoop 36, second vertical beam 37, second cross beam 38, second slide rail 39, second displacement drive device 40, welding head 41, welding bracket 42, third displacement drive device 43. Detailed implementation mode

[0019] As Figures 1 to 7 shown, a welding device for processing a planetary speed reducer disclosed by the present invention, the planetary speed reducer includes a housing 1 and a gear ring 2 installed inside the housing 1. The housing 1 is in a disc shape as a whole, and the gear ring 2 is installed inside the housing 1. Of course, the planetary speed reducer also includes other structures, such as a planetary carrier, planetary gears, and a sun gear, etc. Since the present invention is a device for assisting in the welding process between the gear ring 2 and the housing 1 of the planetary speed reducer, the above-mentioned devices are not proposed yet, and those skilled in the art should be able to understand.

[0020] Specifically, the welding device disclosed by the present invention includes a frame 3 for horizontally supporting the housing 1 and the gear ring 2, a rotational drive device 4 installed at the lower part of the frame 3, and a central rotating shaft 5 connected to the output end of the rotational drive device 4. By horizontally supporting the housing 1 and the gear ring 2, the influence of gravity on the molten pool is relatively small, and the welding device can more easily control the formation and quality of the weld seam. The rotational drive device 4 can directly adopt a reduction motor. By directly connecting the output end of the reduction motor to the central rotating shaft 5, it can be conveniently controlled. The rotational speed can be adjusted according to needs.

[0021] The central rotating shaft 5 of the present invention is simultaneously connected with a central gear 6, a welding assembly 7, and an outer circumferential cooling member 8. A bracket 9 is rotatably installed on the outer side of the central rotating shaft 5; a cooling tooth sac 10 is rotatably installed on the bracket 9. The cooling tooth sac 10 is made of a rubber material and has a certain ability of elastic deformation. The inner side of the cooling tooth sac 10 forms a cavity filled with a coolant, and the coolant can flow in the cavity. The tooth-shaped inner side of the cooling tooth sac 10 also forms a thin-walled cavity, so that better cooling can be achieved. The cooling tooth sac 10 can simultaneously mesh with the gear ring 2 and the central gear 6. The central gear 6 can drive the cooling tooth sac 10 to rotate around the axis of the central gear ring 2 while rotating itself.

[0022] The working principle and process of this invention application are as follows: After installing the housing 1 on the frame 3, install the gear ring 2 inside the housing 1, and then successively install the rotation driving device 4, the central rotating shaft 5, the central gear 6, the cooling tooth capsule 10, the welding assembly 7, and the outer circumferential cooling member 8. After debugging each part, rotate the central rotating shaft 5, and weld the connection part of the housing 1 and the gear ring 2 through the welding assembly 7. During the rotation of the central rotating shaft 5, the outer circumferential cooling member 8 and the cooling tooth capsule 10 rotate with the central rotating shaft 5 to cool the outer side and the inner side of the gear ring 2 respectively. While the above device can perform targeted cooling, it saves cooling costs and reduces the thermal deformation problem of the gear ring 2 during the welding process.

[0023] As a further improvement of the embodiment of the present invention, a hollow cooling shaft 11 is rotatably installed at the center of the cooling tooth capsule 10. The axis of the cooling shaft 11 is vertical. The lower end of the cooling shaft 11 is fixedly connected to the bracket 9. The inner side of the cooling shaft 11 is separated into a first infusion area 12 and a second infusion area 13 by a partition. The outer circumferential surface of the first infusion area 12 is provided with a first through hole 14 communicating with the cavity, and the outer circumferential surface of the second infusion area 13 is provided with a second through hole 15 communicating with the cavity. The upper ends of the first infusion area 12 and the second infusion area 13 are connected with a first infusion pipe 16 and a second infusion pipe 17 respectively. The ends of the first infusion pipe 16 and the second infusion pipe 17 away from the cooling shaft 11 are connected to a cooling box. The cooling box is not drawn here. Its main purpose is to provide a continuous supply of coolant to the inside of the cooling shaft 11. Those skilled in the art should understand that through the first infusion pipe 16 and the second infusion pipe 17, the flow of the coolant can be realized, and the cooling capacity of the cooling tooth capsule 10 can be increased.

[0024] In this embodiment, air bags 18 are installed on both the first infusion pipe 16 and the second infusion pipe 17. By installing the air bags 18, the flow of the coolant in the cavity can be accelerated. A rotating gear 19 is rotatably installed on the bracket 9 at the same time. A central column 20 is coaxially installed in the central hole of the rotating gear 19. The central column 20 is fixed to the bracket 9. A cam 21 is installed inside the rotating gear 19. The air bag 18 is located in the central hole of the rotating gear 19. When the bracket 9 rotates, it can drive the rotating gear 19 to rotate. The rotation of the rotating gear 19 can drive the cam 21 to compress the air bag 18, thereby providing power for the flow of the coolant. No additional power source is required in the whole process, reducing the energy consumption.

[0025] In this embodiment, a shaping gear 22 is rotatably installed on the bracket 9 at the same time. The shaping gear 22 meshes with both the gear ring 2 and the central gear 6. The shaping gear 22, the rotating gear 19, and the cooling tooth capsule 10 are evenly distributed on the outer circumference of the central rotating shaft 5. The shape of the shaping gear 22 is adapted to the inner teeth shape of the gear ring 2. The shaping gear 22 is made of a hard material. When the inner teeth of the gear ring 2 have slight deformation, through the extrusion action of the shaping gear 22, the over-deformation of the inner teeth can be avoided.

[0026] In this embodiment, the outer side of the cooling shaft 11 is threadedly connected with a nut 23, and the nut 23 is located on the outer side of the cooling tooth sac 10. The cooling tooth sac 10 can be pressed downward by rotating the nut 23, so that the cooling tooth sac 10 is compressed. The contact area between the cooling tooth sac 10 and the gear ring 2 is increased as needed to improve the cooling capacity. The cooling tooth sac 10 is abutted against the nut 23 and the bracket 9 by the ball bearings 24 respectively, and the friction of the cooling tooth sac 10 when being pressed can be reduced by rolling.

[0027] In this embodiment, the outer circumferential cooling member 8 includes a first hoop 25, a first vertical beam 26, a first horizontal beam 27, a first slide rail 28, a first displacement driving device 29, a suspension rod 30 and a water outlet cylinder 31. The first hoop 25 is connected to the central rotating shaft 5, the first hoop 25 is connected to the first vertical beam 26, the first vertical beam 26 is connected to the first horizontal beam 27, the first slide rail 28 is slidably matched on the first horizontal beam 27, the first horizontal beam 27 is installed with a first displacement driving device 29 that drives the first slide rail 28 to slide along the first horizontal beam 27, and the outer end of the first slide rail 28 is connected to the water outlet cylinder 31 through the suspension rod 30. The water outlet cylinder 31 includes an inner cylinder 32 and an outer cylinder 33, the upper end of the inner cylinder 32 is fixedly connected to the suspension rod 30, a first water outlet hole 34 is opened on the surface of the inner cylinder 32, the outer cylinder 33 is rotatably installed on the outer side of the inner cylinder 32, a second water outlet hole 35 corresponding to the first water outlet hole 34 is opened on the outer cylinder 33, and the surface of the outer cylinder 33 contacts the outer side of the shell 1. When the outer circumferential cooling member 8 is rotating, the outer cylinder 33 rotates relative to the inner cylinder 32 under the action of friction. When the first water outlet 34 and the second water outlet 35 are aligned, the water in the inner cylinder 32 can overflow and coat the outer circumferential surface of the shell 1 for cooling. When the first water outlet 34 and the second water outlet 35 are staggered, the water can be prevented from flowing out. By alternately supplying and stopping water, it can adapt to the welding speed and meet the actual cooling needs.

[0028] In this embodiment, the welding assembly 7 includes a second hoop 36, a second vertical beam 37, a second cross beam 38, a second slide rail 39, a second displacement driving device 40, a welding head 41, a welding bracket 42, and a third displacement driving device 43. The second hoop 36 is connected to the central rotating shaft 5. The second hoop 36 is connected to the second vertical beam 37. The second vertical beam 37 is connected with a second cross beam 38. A second slide rail 39 is slidably fitted on the second cross beam 38. A second displacement driving device 40 for driving the second slide rail 39 to slide along the second cross beam 38 is installed on the second cross beam 38. The outer end of the second slide rail 39 is fixedly connected with a welding bracket 42. A third displacement driving device 43 is installed on the welding bracket 42. The third displacement driving device 43 adopts a linear motor and can drive the welding head 41 to displace vertically, so as to weld the part to be welded. By adopting the first displacement driving device 29 and the second displacement driving device 40 that can displace radially, and the above devices are controlled by a gear rack, the radial position of the welding head 41 can be adjusted, and the welding of gear rings 2 with different diameters can be adapted.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A welding device for processing a planetary reducer, the planetary reducer comprising a housing and a gear ring installed in the housing, characterized in that: The welding device includes a frame for horizontally supporting a shell and a gear ring, a rotating drive device installed at the bottom of the frame, and a central shaft connected to the output end of the rotating drive device, wherein the central shaft is simultaneously connected to a central gear, a welding assembly and an outer circumferential cooling member, and a bracket is rotatably installed on the outer side of the central shaft; a cooling tooth bag is rotatably installed on the bracket, and the cooling tooth bag is made of elastic material in a gear shape, and the inner side of the cooling tooth bag is formed into a cavity filled with coolant, and the cooling tooth bag can mesh with the gear ring and the central gear at the same time, and the central gear can drive the cooling tooth bag to rotate while rotating around the axis of the central gear ring.

2. A planetary reducer machining welding device according to claim 1, characterized in that: A hollow cooling shaft is rotatably mounted at the center of the cooling tooth sac, the lower end of the cooling shaft is fixedly connected to the bracket, the inner side of the cooling shaft is separated into a first infusion area and a second infusion area by a partition, a first through hole communicating with the cavity is formed on the outer circular surface of the first infusion area, a second through hole communicating with the cavity is formed on the outer circular surface of the second infusion area, the upper ends of the first infusion area and the second infusion area are connected with a first infusion tube and a second infusion tube, and the first infusion tube and the second infusion tube are connected to a cooling box at one end away from the cooling shaft.

3. A planetary reducer machining welding device according to claim 2, characterized in that: Air bags are installed on both the first infusion tube and the second infusion tube. The installation of the air bags can accelerate the flow of the cooling liquid in the cavity.

4. A planetary reducer machining welding device according to claim 3, characterized in that: A rotating tooth is rotatably mounted on the bracket, a center column is coaxially mounted in the center hole of the rotating tooth, the center column is fixed to the bracket, a cam is mounted on the inner side of the rotating tooth, and the airbag is located in the center hole of the rotating tooth.

5. A planetary reducer machining welding device according to claim 4, characterized in that: The bracket is rotatably mounted with shaping teeth, which are meshed with the gear ring and the central gear at the same time. The shaping teeth, rotating teeth and cooling tooth capsules are evenly distributed on the outer circumference of the central rotating shaft.

6. A planetary reducer machining welding device according to claim 2, characterized in that: The outer side of the cooling shaft is threadedly connected with a nut, and the nut is located on the outer side of the cooling tooth sac. The cooling tooth sac can be pressed downward by rotating the nut. The cooling tooth sac is abutted against the nut and the bracket respectively through balls.

7. A planetary reducer machining welding device according to any one of claims 1 to 6, characterized in that: The outer circumferential cooling member includes a first hoop, a first vertical beam, a first cross beam, a first slide rail, a first displacement driving device, a suspension rod and a water outlet cylinder. The first hoop is connected to the central rotating shaft, the first hoop is connected to the first vertical beam, the first vertical beam is connected to the first cross beam, the first cross beam is slidably fitted with a first slide rail, the first cross beam is equipped with a first displacement driving device that drives the first slide rail to slide along the first cross beam, and the outer end of the first slide rail is connected to the water outlet cylinder through a suspension rod.

8. A planetary reducer machining welding device according to claim 7, characterized in that: The water outlet cylinder includes an inner cylinder and an outer cylinder. The upper end of the inner cylinder is fixedly connected to the suspension rod. A first water outlet hole is provided on the surface of the inner cylinder. The outer cylinder is rotatably installed on the outside of the inner cylinder. A second water outlet hole corresponding to the first water outlet hole is provided on the outer cylinder. The surface of the outer cylinder contacts the outside of the shell.

9. A planetary reducer machining welding device according to claim 8, characterized in that: The welding assembly includes a second hoop, a second vertical beam, a second cross beam, a second slide rail, a second displacement drive device, a welding head, a welding bracket, and a third displacement drive device. The second hoop is connected to the central shaft, the second hoop is connected to the second vertical beam, the second vertical beam is connected to the second cross beam, the second cross beam is slidably fitted with a second slide rail, the second cross beam is equipped with a second displacement drive device that drives the second slide rail to slide along the second cross beam, the outer end of the second slide rail is fixedly connected to the welding bracket, the welding bracket is equipped with a third displacement drive device, and the third displacement drive device can drive the welding head to move vertically.

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