Rotary positioning structure for laser welding of steering engine shell

Abstract

The utility model relates to the technical field of machinery, in particular to a rotary positioning structure for laser welding of a steering engine shell, which comprises a welding head connecting piece, an intermediate shaft and a shell positioning pressure head, the shell positioning pressure head is mounted at the bottom of the welding head connecting piece, and a first positioning structure is arranged between the welding head connecting piece and the shell positioning pressure head. The middle shaft is located in the welding head connecting piece, one end of the middle shaft is fixed to the welding head connecting piece, and the other end of the middle shaft is connected with the shell positioning pressing head. Compared with the prior art, by means of the welding head connecting piece, the middle shaft and the shell positioning pressing head, connection of a rotary welding unit of laser transmission welding equipment and a steering engine shell in the equipment operation process is met, and accurate positioning of the steering engine shell in the surrounding welding process is achieved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically a rotary positioning structure for laser welding of steering gear housings. Background Technology

[0002] During the assembly of the steering gear electronic control unit, the upper housing and housing frame need to be welded, and both of these components are non-metallic.

[0003] The welding of the upper housing and the housing frame employs laser transmission welding technology. During the welding process, the laser head on the equipment spirals upwards around the product, requiring the product to maintain precise and stable positioning at all times. However, the existing positioning structure cannot meet the connection and precise positioning requirements between the rotary welding unit of the laser transmission welding equipment and the steering gear housing.

[0004] Therefore, it is necessary to design a rotary positioning structure for laser welding of steering gear housings to connect the rotary welding unit of the laser transmission welding equipment with the steering gear housing, and to accurately position the steering gear housing during the circumferential welding process. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary positioning structure for laser welding of steering gear housing, which connects the rotary welding unit of laser transmission welding equipment to the steering gear housing, and precisely positions the steering gear housing during the circumferential welding process.

[0006] To achieve the above objectives, this utility model is a rotary positioning structure for laser welding of steering gear housing, including a welding head connector, an intermediate shaft, and a housing positioning pressure head. The housing positioning pressure head is installed at the bottom of the welding head connector, and a positioning structure is provided between the welding head connector and the housing positioning pressure head. The intermediate shaft is located inside the welding head connector, with one end of the intermediate shaft fixed to the welding head connector and the other end of the intermediate shaft connected to the housing positioning pressure head.

[0007] The welding head connector includes a quick-change connector, a base, a housing, and a lower cover. The quick-change connector is installed at the top center of the base. The bottom edge of the base is connected to the upper end of the housing. A positioning structure is provided between the base and the housing. The bottom center of the base has a straight groove that matches the bearing seat of the intermediate shaft. The lower end of the housing is connected to the lower cover. The bottom inner ring of the lower cover has a notch that matches the positioning component of the housing positioning pressure head.

[0008] The intermediate shaft includes a bearing seat, a shaft body, a base plate, a cover plate, and elastic components. The straight boss at the top center of the bearing seat is embedded in the straight groove of the base. The top edge of the bearing seat is embedded between the base and the outer shell. The upper end of the shaft body is installed in the inner hole of the bearing seat. The lower end of the shaft body passes through the cover plate and is connected to the positioning sleeve of the positioning head of the housing. The convex ring structure on the surface of the shaft body is located between the bearing seat and the cover plate. The base plate is sleeved on the outside of the bearing seat. The base plate and the bearing seat are connected by bearing one. Several sets of elastic components are installed between the base plate and the cover plate. The bottom of the cover plate is connected to the top center of the pressure head body of the positioning head of the housing by bearing two.

[0009] The housing positioning pressure head includes a baffle, a pressure head body, a positioning component, a positioning sleeve, and a contouring component. The top edge of the pressure head body is connected to the baffle. The baffle is located in the internal space between the lower cover and the outer shell. The top edge of the baffle is provided with a positioning component. The positioning component is inserted into or separated from the notch of the lower cover. A positioning sleeve is installed in the center of the bottom of the pressure head body, and a contouring component is installed on the bottom edge of the pressure head body.

[0010] The quick-connect coupling has a through hole running from top to bottom, and the base has a boss on top. The boss is embedded in the lower end of the through hole of the quick-connect coupling, and the quick-connect coupling and the base are connected by bolts.

[0011] The base has bolt holes at the bottom, and slotted threaded sleeves are installed in the bolt holes. Bolt 2 passes through the mounting hole at the upper end of the outer shell and connects with the slotted threaded sleeve. Bolt 3 connects the outer shell and the lower cover.

[0012] The positioning structure includes a positioning pin one and a positioning pin two. Positioning pin one is installed in the mounting hole at the lower end of the outer shell, and positioning pin two is installed in the mounting hole on the side of the pressure head body. Positioning pin one and positioning pin two are in contact or separated.

[0013] The second positioning structure includes a positioning pin sleeve and a third positioning pin. The positioning pin sleeve is installed in the bottom bolt hole of the base, and the third positioning pin is installed in the mounting hole at the upper end of the outer shell. The third positioning pin is inserted into the pin hole of the positioning pin sleeve.

[0014] The shaft seat and the shaft body are provided with a shoulder-type oilless bushing and a straight column-type oilless bushing from top to bottom. The first bearing is a needle roller thrust bearing, and the second bearing is a ball roller thrust bearing.

[0015] The elastic component includes a rod, a spring, and a stop block. One end of the rod is fixed to the base plate with four bolts, and the other end of the rod is fixed to the cover plate with five bolts. The spring and the stop block are sleeved on the outside of the rod, with the two ends of the spring abutting against one end of the rod and the end of the stop block, respectively.

[0016] The positioning component includes a positioning nut and a threaded limiting pin. The threaded limiting pin is fixed to the edge of the baffle by the positioning nut, and the end of the threaded limiting pin protrudes from the lower surface of the baffle.

[0017] The baffle and the pressure head body are fixed together by bolt six. The positioning sleeve is a countersunk positioning sleeve with a shoulder. The positioning sleeve and the shaft body are fixed together by bolt seven. The pressure head body and the contouring component are fixed together by bolt eight.

[0018] The contouring component matches the shape of the steering gear housing.

[0019] Compared with the prior art, this utility model, through the welding head connector, intermediate shaft, and housing positioning pressure head, satisfies the connection between the rotating welding unit of the laser transmission welding equipment and the steering gear housing during equipment operation, and achieves precise positioning of the steering gear housing during the circumferential welding process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is an exploded view of the present invention.

[0022] Figure 3 This is a cross-sectional view of the present invention.

[0023] Figure 4 This is an exploded view of the welded head connector of this utility model.

[0024] Figure 5 This is an exploded view of the intermediate shaft of this utility model.

[0025] Figure 6 This is an exploded view of the housing positioning pressure head of this utility model.

[0026] Figure 7 This is a schematic diagram showing the usage state of this utility model.

[0027] Figure 8 This is a cross-sectional view of the present invention in its free state.

[0028] Figure 9 This is a cross-sectional view of the present invention in its initial working state.

[0029] Figure 10 This is a cross-sectional view of the present invention in its final working state. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings.

[0031] See Figure 1 , Figure 2 and Figure 3 This utility model is a rotary positioning structure for laser welding of steering gear housing, including a welding head connector, an intermediate shaft, and a housing positioning pressure head. The bottom of the welding head connector 1 is equipped with a housing positioning pressure head 3. A positioning structure is provided between the welding head connector 1 and the housing positioning pressure head 3. The intermediate shaft 2 is located inside the welding head connector 1. One end of the intermediate shaft 2 is fixed to the welding head connector 1, and the other end of the intermediate shaft 2 is connected to the housing positioning pressure head 3.

[0032] See Figure 4 The welding head connector 1 includes a quick-connect connector 11, a base 12, a housing 13, and a lower cover 14. The quick-connect connector 11 is installed at the top center of the base 12. The bottom edge of the base 12 is connected to the upper end of the housing 13. A positioning structure 2 is provided between the base 12 and the housing 13. The bottom center of the base 12 has a straight groove that matches the bearing seat 21 of the intermediate shaft 2 to facilitate the positioning of the intermediate shaft 2. The lower end of the housing 13 is connected to the lower cover 14. The bottom inner ring of the lower cover 14 has a notch 141 that matches the positioning component of the housing positioning pressure head 3.

[0033] See Figure 5 The intermediate shaft 2 includes a bearing seat 21, a shaft body 22, a base plate 23, a cover plate 25, and elastic components. A straight-cut boss at the top center of the bearing seat 21 is embedded in a straight-cut groove in the base 12. The top edge of the bearing seat 21 is embedded between the base 12 and the outer shell 13, thus pressing the bearing seat 21 firmly and preventing it from moving. The upper end of the shaft body 22 is installed inside the inner hole of the bearing seat 21. The lower end of the shaft body 22 passes through the cover plate 25 and connects to the positioning sleeve 33 of the housing positioning head 3. A raised ring structure on the surface of the shaft body 22 is located between the bearing seat 21 and the cover plate 25. The base plate 23 is sleeved on the outside of the bearing seat 21. The base plate 23 and the bearing seat 21 are connected by a bearing 24. Several sets of elastic components are installed between the base plate 23 and the cover plate 25. The base plate 23 bears the thrust of the elastic components, making the rotation of the elastic components around the shaft body 22 smoother and reducing oscillation. The bottom of the cover plate 25 is connected to the top center of the pressure head body 32 of the housing positioning pressure head 3 by bearing 213.

[0034] See Figure 6 The housing positioning pressure head 3 includes a baffle 31, a pressure head body 32, a positioning component, a positioning sleeve 33, and a contouring component 34. The top edge of the pressure head body 32 is connected to the baffle 31. The baffle 31 is located in the internal space between the lower cover 14 and the outer shell 13. The top edge of the baffle 31 is provided with a positioning component, which is inserted into or separated from the notch 141 of the lower cover 14. The positioning sleeve 33 is installed at the center of the bottom of the pressure head body 32, and the contouring component 34 is installed at the bottom edge of the pressure head body 32. The baffle 31 moves with the pressure head body 32, and the lower limit of the downward movement of the housing positioning pressure head 3 is the position where the baffle 31 contacts the inner wall of the lower cover 14.

[0035] The quick-connector 11 has a through hole running through the top and bottom, and the base 12 has a boss on the top. The boss is embedded in the lower end of the through hole of the quick-connector 11 to achieve positioning. The quick-connector 11 and the base 12 are connected by bolt 17.

[0036] The base 12 has bolt holes at its bottom, and slotted threaded inserts 18 are installed in the bolt holes to increase the connection and load-bearing capacity of the threaded holes and enhance the material and durability. Bolt 19 passes through the mounting hole at the upper end of the outer shell 13 and connects with the slotted threaded insert 18. The outer shell 13 and the lower cover 14 are connected by bolt 110.

[0037] Positioning structure one includes positioning pin one 111 and positioning pin two 37. Positioning pin one 111 is installed in the mounting hole at the lower end of the housing 13, and positioning pin two 37 is installed in the mounting hole on the side of the pressure head body 32. Positioning pin one 111 and positioning pin two 37 are in contact or separated. Positioning structure one is used to indicate the initial installation position.

[0038] The second positioning structure includes a positioning pin sleeve 15 and a positioning pin three 16. The positioning pin sleeve 15 is installed in the bottom bolt hole of the base 12, and the positioning pin three 16 is installed in the mounting hole at the upper end of the outer shell 13. The positioning pin three 16 is inserted into the pin hole of the positioning pin sleeve 15.

[0039] Between the bearing seat 21 and the shaft body 22, from top to bottom, there are shoulder-type oilless bushings 26 and straight column-type oilless bushings 27. Bearing 1 24 is a needle roller thrust bearing, and bearing 213 is a ball thrust bearing.

[0040] The elastic component includes a rod 28, a spring 29, and a stop block 210. One end of the rod 28 is fixed to the base plate 23 with bolt 211, and the other end of the rod 28 is fixed to the cover plate 25 with bolt 212. The spring 29 and the stop block 210 are sleeved on the outside of the rod 28, with the two ends of the spring 29 abutting against one end of the rod 28 and the end of the stop block 210, respectively. Under the push of the spring 29, the shaft body 22 slides up and down within the shaft seat 21. The specifications of the spring 29 are selected according to the pressure limit of the pressure-bearing surface of the steering gear housing.

[0041] The positioning assembly includes a positioning nut 35 and a threaded limit pin 36. The threaded limit pin 36 is fixed to the edge of the baffle 31 by the positioning nut 35, and the end of the threaded limit pin 36 protrudes from the lower surface of the baffle 31.

[0042] The baffle 31 is fixed to the pressure head body 32 by bolt six 38. The positioning sleeve 33 is a countersunk positioning sleeve with a shoulder. The positioning sleeve 33 is fixed to the shaft body 22 by bolt seven 39. The pressure head body 32 is fixed to the contouring component 34 by bolt eight 310.

[0043] The contouring component 34 matches the shape of the steering gear housing. Different contouring components 34 are designed for different steering gear housing shapes. During steering gear housing production changes, different complete rotary positioning structures can be quickly switched using the quick-change joint 11.

[0044] See Figure 7 Among them, the rotary servo mechanism 4, the track 6, the laser emitter 7, the gap detection sensor 8, and the lifting and positioning device 9 are all components of the laser transmission welding equipment itself.

[0045] In operation, the quick-change connector 11 of the welding head connector 1 is installed and fixed to the lower end of the rotary servo mechanism 4. After the steering gear housing 5 is transported to its position, the lifting and positioning device 9 lifts and positions the steering gear housing 5.

[0046] See Figure 8 Initially, the rotary positioning structure is in a free state. Under the tension of the spring 29 in the elastic component, the baffle 31 of the housing positioning head 3 contacts the inner wall of the lower cover 14 of the welding head connector 1, as shown. Figure 8 As shown in circle B1; the threaded limiting pin 36 is inserted into the notch 141 of the lower cover 14, as shown. Figure 8 As shown in circle A1, this restricts the relative position of the housing positioning head 3.

[0047] The laser welding device then moves downwards along track 6 to press the product. See also... Figure 9 Initially, the rotary positioning structure is in its initial state. The spring 29 in the elastic component contracts, and the baffle 31 of the housing positioning head 3 disengages from the inner wall of the lower cover 14 of the welding head connector 1. Figure 9 As shown in circle B2; the threaded limiting pin 36 is away from the notch 141 of the lower cover 14, as... Figure 9 As shown in circle A2, relative rotation is allowed between the housing positioning head 3 and the welding head connector 1. At this time, the contouring component 34 of the housing positioning head 3 will press against the steering gear housing 5 and remain stationary. There is a small gap between the head body 32 and the lower cover 14. The gap detection sensor 8 will detect this gap to ensure that the lifting height and horizontal position of the steering gear housing 5 meet the welding position requirements.

[0048] The laser emitter 7 corresponds to the welding position of the steering gear housing 5, and after the welding begins, it continuously spirals upward around the steering gear housing 5 with the rotation servo mechanism 4, continuously welding from the lower limit position of the welding area to the upper limit position.

[0049] See Figure 10 During the welding process, the welding head connector 1 rotates and rises with the laser welding device, and the distance between the baffle 31 of the housing positioning pressure head 3 and the inner wall of the lower cover 14 of the welding head connector 1 gradually decreases, such as... Figure 10As shown in circle B3; the threaded limiting pin 36 gradually approaches the notch 141 of the lower cover 14, as... Figure 10 As shown in circle A3, the gap between the pressure head body 32 and the lower cover 14 gradually increases. Throughout the welding process, the gap detection sensor 8 detects the gap between the pressure head body 32 and the lower cover 14. The gap measurement result is required to increase steadily and continuously as the equipment operates, thereby ensuring that the laser welding surface remains stable relative to the plane of the product.

[0050] This invention, through a welding head connector, an intermediate shaft, and a housing positioning pressure head, satisfies the connection between the rotating welding unit of the laser transmission welding equipment and the steering gear housing during equipment operation, and achieves precise positioning of the steering gear housing during the circumferential welding process.

Claims

1. A rotary positioning structure for laser welding of steering gear housing, comprising a welding head connector, an intermediate shaft, and a housing positioning pressure head, characterized in that: A housing positioning head (3) is installed at the bottom of the welding head connector (1). A positioning structure is provided between the welding head connector (1) and the housing positioning head (3). An intermediate shaft (2) is located inside the welding head connector (1). One end of the intermediate shaft (2) is fixed to the welding head connector (1), and the other end of the intermediate shaft (2) is connected to the housing positioning head (3). The welding head connector (1) includes a quick-change connector (11), a base (12), a housing (13), and a lower cover (14). The quick-change connector (11) is installed at the top center of the base (12). The bottom edge of the base (12) is connected to the upper end of the housing (13). A positioning structure II is provided between the base (12) and the housing (13). A straight groove matching the bearing seat (21) of the intermediate shaft (2) is provided at the bottom center of the base (12). The lower end of the housing (13) is connected to the lower cover (14). The bottom inner ring of the lower cover (14) is provided with a notch (141) matching the positioning component of the housing positioning pressure head (3). The intermediate shaft (2) includes a bearing seat (21), a shaft body (22), a base plate (23), a cover plate (25), and an elastic component. The straight boss at the top center of the bearing seat (21) is embedded in the straight groove of the base (12). The top edge of the bearing seat (21) is embedded between the base (12) and the outer shell (13). The upper end of the shaft body (22) is installed in the inner hole of the bearing seat (21). The lower end of the shaft body (22) passes through the cover plate (25) and is positioned by the positioning head (3) of the outer shell. The sleeve (33) is connected, and the convex ring structure on the surface of the shaft body (22) is located between the shaft seat (21) and the cover plate (25). The bottom plate (23) is sleeved on the outside of the shaft seat (21). The bottom plate (23) and the shaft seat (21) are connected by bearing one (24). Several sets of elastic components are installed between the bottom plate (23) and the cover plate (25). The bottom of the cover plate (25) is connected to the top center of the pressure head body (32) of the housing positioning pressure head (3) by bearing two (213). The housing positioning pressure head (3) includes a baffle (31), a pressure head body (32), a positioning component, a positioning sleeve (33), and a contouring component (34). The top edge of the pressure head body (32) is connected to the baffle (31). The baffle (31) is located in the internal space between the lower cover (14) and the outer shell (13). The top edge of the baffle (31) is provided with a positioning component. The positioning component is inserted into the notch (141) of the lower cover (14) or separated from the notch (141) of the lower cover (14). The positioning sleeve (33) is installed in the center of the bottom of the pressure head body (32), and the contouring component (34) is installed on the bottom edge of the pressure head body (32).

2. The rotary positioning structure for laser welding of steering gear housing according to claim 1, characterized in that: The quick-connector (11) is provided with a through hole running through the top and bottom. The base (12) is provided with a boss at the top. The boss is embedded in the lower end of the through hole of the quick-connector (11). The quick-connector (11) and the base (12) are connected by bolt (17).

3. The rotary positioning structure for laser welding of steering gear housing according to claim 1, characterized in that: The base (12) is provided with bolt holes at the bottom, and slotted threaded sleeves (18) are installed in the bolt holes. Bolt 2 (19) passes through the mounting hole at the upper end of the outer shell (13) and is connected to the slotted threaded sleeve (18). The outer shell (13) and the lower cover (14) are connected by bolt 3 (110).

4. The rotary positioning structure for laser welding of steering gear housing according to claim 1, characterized in that: The positioning structure includes a positioning pin 1 (111) and a positioning pin 2 (37). The positioning pin 1 (111) is installed in the mounting hole at the lower end of the outer shell (13), and the positioning pin 2 (37) is installed in the mounting hole on the side of the pressure head body (32). The positioning pin 1 (111) and the positioning pin 2 (37) are in contact or separated.

5. The rotary positioning structure for laser welding of steering gear housing according to claim 1, characterized in that: The second positioning structure includes a positioning pin sleeve (15) and a positioning pin three (16). The positioning pin sleeve (15) is installed in the bottom bolt hole of the base (12), and the positioning pin three (16) is installed in the mounting hole at the upper end of the outer shell (13). The positioning pin three (16) is inserted into the pin hole of the positioning pin sleeve (15).

6. The rotary positioning structure for laser welding of steering gear housing according to claim 1, characterized in that: The bearing seat (21) and the shaft body (22) are provided with a shoulder-type oilless bushing (26) and a straight column-type oilless bushing (27) from top to bottom. The bearing one (24) is a needle roller thrust bearing and the bearing two (213) is a ball thrust bearing.

7. The rotary positioning structure for laser welding of steering gear housing according to claim 1, characterized in that: The elastic component includes a rod (28), a spring (29), and a stop (210). One end of the rod (28) is fixed to the base plate (23) with bolt four (211), and the other end of the rod (28) is fixed to the cover plate (25) with bolt five (212). The spring (29) and the stop (210) are sleeved on the outside of the rod (28), and the two ends of the spring (29) abut against one end of the rod (28) and the end of the stop (210), respectively.

8. A rotary positioning structure for laser welding of a steering gear housing according to claim 1, characterized in that: The positioning component includes a positioning nut (35) and a threaded limiting pin (36). The threaded limiting pin (36) is fixed to the edge of the baffle (31) by the positioning nut (35), and the end of the threaded limiting pin (36) protrudes from the lower surface of the baffle (31).

9. A rotary positioning structure for laser welding of a steering gear housing according to claim 1, characterized in that: The baffle (31) is fixed to the pressure head body (32) by bolt six (38), the positioning sleeve (33) is a countersunk positioning sleeve with a shoulder, the positioning sleeve (33) is fixed to the shaft body (22) by bolt seven (39), and the pressure head body (32) is fixed to the contouring component (34) by bolt eight (310).

10. A rotary positioning structure for laser welding of a steering gear housing according to claim 1, characterized in that: The contouring component (34) is matched to the shape of the steering gear housing.

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