A jig for assembling and aligning the front axle of a round tube

Abstract

The present invention relates to the technical field of the assembly of a circular tube front axle, and particularly relates to a positioning tooling fixture for the assembly of a circular tube front axle, which includes an assembly frame, a placement mechanism, and a positioning mechanism. In the positioning mechanism designed by the present invention, the front steering axle is clamped on the positioning rod, and the positioning shaft is driven to rotate by an existing driving motor. During the rotation of the positioning shaft, it drives the rotation through the positioning disc. Furthermore, the positioning disc drives the positioning connecting rod to rotate through the positioning rod. When the positioning connecting rod enters the installation hole on the front axle and inside the front steering axle, at this time, the threaded hole is aligned with the installation hole on the installation disc, and then the fastening bolt is passed through the above-mentioned threaded hole and the installation hole on the installation disc, and the front steering axle can be fixed on the front axle.

Description

Technical Field

[0001] The present invention relates to the technical field of the assembly of a round tube front axle, and particularly relates to a positioning tooling fixture for the assembly of a round tube front axle. Background Art

[0002] The round tube front axle is composed of a front axle, a front steering axle, etc., and is a device for transmitting various acting forces and the bending moment and torque generated therebetween between the vehicle frame and the front wheels. The round tube front axle is connected to the vehicle frame through a suspension, and wheels are installed at both ends thereof. Therefore, during the assembly process of the round tube front axle, it is necessary to fixedly clamp the front steering axle and the front axle through a tooling, and then threadedly connect the front steering axle to the front axle to facilitate the smooth progress of the assembly work.

[0003] In the existing tooling fixtures, it is necessary to manually adjust the front steering axle for positioning to ensure that the central axis of the mounting hole on the front steering axle is aligned with the central axis of the mounting hole on the front axle. After manually adjusting the position of the front steering axle, it is necessary to visually judge whether the central axes of the above two mounting holes are aligned. Due to the error in visual observation, the central axes of the above two mounting holes may not be on the same line, which may cause the fastening bolts to not pass through the mounting holes of the above two, thereby affecting the installation efficiency of the front steering axle and the front axle.

[0004] Since the front axles of the same brand but different vehicle series may have different lengths, the distance between the mounting holes on the front axle and the vehicle frame is also different. The traditional tooling fixtures can only limit and fix the front axles with the same mounting hole spacing, and the applicable effect is poor. Summary of the Invention

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: A positioning tooling fixture for the assembly of a round tube front axle, including an assembly frame. A placement mechanism is arranged on the upper end surface of the assembly frame, and positioning mechanisms are commonly installed on the upper end surface of the assembly frame and on the left and right sides of the placement mechanism.

[0006] The placement mechanism includes a two-way cylinder fixed in the middle of the upper end surface of the assembly frame. Movement grooves are opened on the upper end surface of the assembly frame and on the left and right sides of the two-way cylinder. Placement frames are slidably arranged inside the movement grooves. Support protrusions are arranged on the front and rear sides of the placement frames. An arc-shaped groove extending left and right is opened on the upper end surface of the placement frames. Locking parts are arranged on the support protrusions.

[0007] The positioning mechanism includes a positioning frame slidably arranged inside the movement grooves. A positioning shaft is installed on the positioning frame through a bearing. A positioning disc is fixedly arranged on the opposite surfaces of the positioning shaft. A plurality of positioning rods are evenly installed circumferentially on the side of the positioning disc away from the positioning shaft. A positioning part is installed on the side of the reset rod away from the positioning disc. The part of the assembly frame between the two movement grooves is installed with a two-way screw through a bearing. The left and right ends of the two-way screw are respectively threadedly connected to the left and right positioning frames.

[0008] Preferably, the locking portion includes a limiting rod fixed to the middle of the upper end surface of the supporting protrusion. A locking groove extending left and right is formed on the circumferential surface of the limiting rod. Symmetrically arranged locking plates are installed on the lower end surface of the locking groove through spring hinges. In the middle of the upper part inside the locking groove, an isosceles trapezoidal block is provided. Symmetrically arranged relief grooves are formed on the upper end surface of the isosceles trapezoidal block. A reset spring rod is installed at the bottom of the relief groove, and the upper ends of the reset spring rods are all installed on the upper end surface of the locking groove. The two waists of the isosceles trapezoidal block respectively abut against the opposite surfaces of the left and right locking plates.

[0009] Preferably, linkage blocks are slidably arranged on the upper end surface of the supporting protrusion and on the left and right sides of the limiting rod. A linkage groove is formed inside the supporting protrusion and between the two linkage blocks. A linkage plate is arranged inside the linkage groove. The left and right ends of the linkage plate are respectively fixedly connected to the left and right linkage blocks. A linkage rope is fixed to the lower end surface of the isosceles trapezoidal block. The lower end of the linkage rope passes through the limiting rod and is fixed to the upper end surface of the linkage plate fixed to the supporting protrusion.

[0010] Preferably, the alignment portion includes an alignment groove formed inside the alignment rod and extending left and right. An alignment link is slidably arranged on the side of the alignment groove away from the alignment frame. An alignment protrusion is arranged inside the alignment groove. An alignment spring rod is jointly installed on the alignment protrusion and the alignment link.

[0011] Preferably, a movable rod that can be reset is slidably arranged on the alignment rod along a direction perpendicular to the axis of the alignment rod. Two abutting rods are installed on the lower end surface of the movable rod through hinges, and the two abutting rods are in a V-shaped structure. The ends of the abutting rods away from the movable rod are slidably arranged on the alignment rod. A guiding inclined surface is arranged at the end of the alignment rod away from the abutting rods. A reset groove extending left and right is arranged in the middle of the alignment rod. A linkage rod corresponding to the reset groove is installed at one end of the alignment link located inside the alignment groove.

[0012] Preferably, limiting plates are installed on the opposite surfaces of the placement frame. A fixed connection plate is slidably arranged on the upper end surface of the limiting plate. A fixed rod is installed on the side of the fixed connection plate away from the placement frame. A return spring rod is jointly installed on the fixed connection plate and the limiting plate. A positioning hole is formed on the front end surface of the fixed connection plate. A positioning rod extending forward and backward is slidably arranged in the middle of the front end surface of the limiting plate.

[0013] Preferably, limiting protrusions are arranged below the front and rear sides of the placement frame and the alignment frame. Limiting sliding grooves matching the limiting protrusions are formed inside the moving grooves. The mutual cooperation of the limiting protrusions and the limiting sliding grooves can limit the alignment frame and the placement frame, avoiding the overturning of the alignment frame and the placement frame and resulting in the fracture of the telescopic end of the double-acting cylinder and the double-threaded screw.

[0014] Preferably, a ball is provided on the side of the counterpoint connecting rod away from the counterpoint rod, and a positioning plate is fixedly installed on the circumferential surface of the counterpoint rod. The ball can reduce the friction between the counterpoint connecting rod and the mounting disc, reduce the wear of the mounting disc, and at the same time enable the counterpoint connecting rod to slide smoothly on the mounting disc. The positioning plate can limit the front steering axle during its movement to prevent excessive movement and collision with the counterpoint disc, thus protecting the front steering axle.

[0015] Preferably, rubber pads are provided on the opposite sides of the locking plate, and an annular inclined surface is provided on the upper end surface of the limiting rod. The rubber pads can compensate between the locking plate and the mounting frame, so that the locking plate is always in close contact with the mounting frame, increasing the stability of the locking plate in limiting the mounting frame. The annular inclined surface plays a guiding role during the placement of the mounting frame, enabling the mounting holes on the mounting frame to quickly and smoothly enter the outside of the limiting plate.

[0016] The beneficial effects of the present invention are as follows: 1. In the placement mechanism designed by the present invention, starting the bidirectional cylinder can drive the placement rack to move left and right. Then, the placement rack can drive the locking part to move left and right. Furthermore, the placement rack can limit and fix the front axle with different mounting hole spacings, making the placement mechanism more widely applicable.

[0017] 2. In the counterpoint mechanism designed by the present invention, the front steering axle is clamped on the counterpoint rod, and the existing drive motor drives the counterpoint shaft to rotate. During the rotation of the counterpoint shaft, it drives the rotation through the counterpoint disc. Furthermore, the counterpoint disc drives the counterpoint connecting rod to rotate through the counterpoint rod. When the counterpoint connecting rod enters the installation hole between the front axle and the front steering axle, at this time, the threaded hole is aligned with the installation hole on the mounting disc, and then the fastening bolt is passed through the above-mentioned threaded hole and the installation hole on the mounting disc to fix the front steering axle on the front axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Figure 1 is a three-dimensional installation structure schematic diagram of the present invention and the round tube front axle.

[0020] Figure 2 is the present invention Figure 1 partial three-dimensional structure schematic diagram.

[0021] Figure 3 is a three-dimensional installation structure schematic diagram of the placement mechanism of the present invention and the round tube front axle.

[0022] Figure 4 is the present invention Figure 3 partial three-dimensional structure schematic diagram.

[0023] Figure 5 is a three-dimensional installation structure schematic diagram of the counterpoint mechanism of the present invention and the round tube front axle.

[0024] Figure 6 This is the front view of the present invention. Figure 5 of the main view.

[0025] Figure 7 This is a schematic diagram of the internal installation structure of the locking part and the supporting protrusion of the present invention.

[0026] Figure 8 This is the present invention Figure 7 partial enlarged view of part A.

[0027] Figure 9 This is a schematic diagram of the installation mechanism between the alignment rod and the alignment part of the present invention.

[0028] Figure 10 This is the present invention Figure 9 partial structure schematic diagram (viewed from left to right).

[0029] Figure 11 This is a schematic diagram of the alignment disc structure on the right side of the present invention (viewed from left to right).

[0030] Figure 12 This is the assembled round tube front axle of the present invention.

[0031] In the figure: 1. Assembly frame; 2. Placing mechanism; 21. Double-acting cylinder; 22. Moving groove; 221. Limit sliding groove; 23. Placing frame; 231. Limit plate; 232. Fixed connecting plate; 233. Fixed rod; 234. Positioning hole; 235. Positioning rod; 236. Return spring rod; 24. Locking part; 241. Limit rod; 242. Locking groove; 243. Locking plate; 2431. Rubber pad; 244. Isosceles trapezoidal block; 245. Reset spring rod; 246. Linking block; 247. Linking groove; 248. Linking plate; 249. Linking rope; 3. Alignment mechanism; 31. Alignment frame; 32. Alignment shaft; 33. Alignment disc; 34. Alignment rod; 341. Moving rod; 342. Tightening rod; 343. Reset groove; 344. Linking rod; 345. Ball; 346. Positioning plate; 35. Alignment part; 351. Alignment groove; 352. Alignment connecting rod; 353. Alignment spring rod; 36. Double-threaded screw; 4. Round tube front axle; 41. Front axle; 42. Front steering axle; 43. Installation disc; 44. Installation hole; 45. Installation frame. Detailed implementation manners

[0032] The following will describe in detail the embodiments of the present invention with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the claims.

[0033] Refer to Figure 1A round tube front axle assembly alignment fixture comprises an assembly frame 1, a placement mechanism 2 is arranged on the upper end surface of the assembly frame 1, and an alignment mechanism 3 is installed on the upper end surface of the assembly frame 1 and on the left and right sides of the placement mechanism 2.

[0034] See also Figure 2 The placement mechanism 2 includes a two-way cylinder 21 fixed to the middle part of the upper end surface of the assembly frame 1, wherein the upper end surface of the assembly frame 1 and the left and right sides of the two-way cylinder 21 are provided with a movable groove 22, and a placement frame 23 is slidably arranged inside the movable groove 22, and the placement frame 23 is provided with supporting protrusions on the front and rear sides, and the upper end surface of the placement frame 23 is provided with an arc groove extending left and right, and a locking portion 24 is provided on the supporting protrusion.

[0035] See also Figure 3 , Figure 7 as well as Figure 8 The locking portion 24 includes a limiting rod 241 fixed to the middle part of the upper end surface of the supporting protrusion, and a locking groove 242 extending left and right is opened on the circumferential surface of the limiting rod 241. A left-right symmetrical locking plate 243 is installed on the lower end surface of the locking groove 242 through a spring hinge. An isosceles trapezoidal block 244 is arranged in the middle of the upper part of the locking groove 242. A left-right symmetrical giving way groove is opened on the upper end surface of the isosceles trapezoidal block 244. A reset spring rod 245 is installed at the bottom of the giving way groove. The upper ends of the reset spring rods 245 are all installed on the upper end surface of the locking groove 242. The left and right waists of the isosceles trapezoidal block 244 are respectively against the opposite surfaces of the left and right locking plates 243;

[0036] A linkage block 246 is slidably arranged on the upper end surface of the supporting protrusion and located on the left and right sides of the limit rod 241. A linkage groove 247 is opened inside the supporting protrusion and located between the two linkage blocks 246. A linkage plate 248 is arranged inside the linkage groove 247. The left and right ends of the linkage plate 248 are respectively fixedly connected to the left and right linkage blocks 246. A linkage rope 249 is fixed to the lower end surface of the isosceles trapezoidal block 244. The lower end of the linkage rope 249 passes through the limit rod 241 and is fixed to the upper end surface of the linkage plate 248 with the supporting protrusion.

[0037] See also Figure 12, wherein the circular tube front axle 4 is composed of a front axle 41 and a front steering axle 42. Mounting discs 43 are installed at the left and right ends of the front axle 41. A plurality of mounting holes 44 are circumferentially and evenly arranged on the mounting discs 43. Mounting frames 45 that are symmetrically arranged front and back are installed on the left and right sides of the circumferential surface of the front axle 41. Mounting holes 44 for fixing to the vehicle frame are provided on the mounting frames 45. A plurality of mounting ears that correspond one-to-one with the mounting holes 44 on the mounting discs 43 are circumferentially and evenly installed on the circumferential surface of the front steering axle 42. Threaded holes are provided on the mounting ears. During specific operation, measure the distance between two adjacent mounting frames 45 on the left and right. Start the bidirectional cylinder 21 to drive the placing frame 23 to slide a certain distance inside the moving groove 22. The distance between the two placing frames 23 after movement is the distance between the two mounting frames 45. Therefore, the movable placing frame 23 can place mounting frames 45 with different distances.

[0038] After the movement of the placing frame 23 ends, hoist the front axle 41 above the two placing frames 23 through existing hoisting equipment, so that the front axle 41 is located inside the arc-shaped groove, and the mounting holes 44 on the mounting frames 45 are aligned with the limiting rods 241. Then place the front axle 41 on the placing frame 23 through existing hoisting equipment. During the placing process, the mounting holes 44 on the mounting frames 45 pass through the limiting rods 241. During the downward movement of the front axle 41, the mounting frames 45 move downward synchronously. Furthermore, the mounting frames 45 drive the linkage blocks 246 to move downward. During the downward movement of the linkage blocks 246, the isosceles trapezoidal blocks 244 are driven to move downward through the linkage ropes 249. During the downward movement of the isosceles trapezoid, the reset spring rods 245 are stretched synchronously. During the downward movement of the isosceles trapezoidal blocks 244, the locking plates 243 can be driven to rotate around the hinges through the two inclined waists. During the continuous downward movement of the isosceles trapezoidal blocks 244, the locking plates 243 can be driven to abut against the mounting frames 45. Furthermore, the locking plates 243 can perform vertical direction limiting treatment on the mounting frames 45. The limiting rods 241 can perform horizontal direction limiting treatment on the mounting frames 45. Therefore, the locking plates 243 and the limiting rods 241 cooperate with each other to limit and lock the mounting frames 45, thereby ensuring the stability of the front axle 41.

[0039] Refer to Figure 3 and Figure 4, on the opposite faces of the placement rack 23, limit plates 231 are installed. On the upper end face of the limit plate 231, a fixed connecting plate 232 is slidably arranged. On the side of the fixed connecting plate 232 away from the placement rack 23, a fixed rod 233 is installed. A return spring rod 236 is jointly installed on the fixed connecting plate 232 and the limit plate 231. A positioning hole 234 is formed on the front end face of the fixed connecting plate 232. In the middle of the front end face of the limit plate 231, a positioning rod 235 extending forward and backward is slidably arranged. In the starting position, the positioning rod 235 limits the fixed connecting plate 232, and the return spring rod 236 is in a contracted and tense state. After the front axle 41 is placed, the positioning rod 235 is released, and the return spring rod 236 expands to drive the fixed connecting plate 232 to move. During the movement of the fixed connecting plate 232, the fixed rod 233 is driven to move into the installation hole 44 at the bottommost part of the installation disc 43. Therefore, the cooperation between the fixed rod 233 and the fixed connecting plate 232 can limit the installation disc 43 to prevent the installation disc 43 from shaking during the assembly process. When placing the fastening bolt in the installation hole 44 at the bottommost part of the installation disc 43, manually push the fixed connecting plate 232 back to the starting position, and then insert the positioning rod 235 into the positioning hole 234.

[0040] Refer to Figure 8 , rubber pads 2431 are arranged on the opposite faces of the locking plates 243. An annular inclined surface is arranged on the upper end face of the limit rod 241. The rubber pads 2431 can compensate between the locking plates 243 and the installation frame 45, so that the locking plates 243 are always in close contact with the installation frame 45, increasing the stability of the locking plates 243 limiting the installation frame 45. The annular inclined surface plays a guiding role during the placement of the installation frame 45, enabling the installation holes 44 on the installation frame 45 to quickly and smoothly enter the outside of the limit plate 231.

[0041] Refer to Figure 5 and Figure 6 , the alignment mechanism 3 includes an alignment rack 31 slidably arranged inside the moving groove 22. Among them, an alignment shaft 32 is installed on the alignment rack 31 through a bearing. Opposite faces of the alignment shaft 32 are fixedly provided with alignment discs 33. A plurality of alignment rods 34 are evenly installed circumferentially on the side of the alignment disc 33 away from the alignment shaft 32. An alignment part 35 is installed on the side of the reset rod away from the alignment disc 33. The part of the assembly rack 1 between the two moving grooves 22 is installed with a bidirectional screw rod 36 through a bearing. The left and right ends of the bidirectional screw rod 36 are respectively threadedly connected to the left and right alignment racks 31.

[0042] Refer to Figure 9 , the alignment part 35 includes an alignment groove 351 formed inside the alignment rod 34 and extending left and right. A sliding alignment link 352 is arranged on the side of the alignment groove 351 away from the alignment rack 31. Alignment protrusions are arranged inside the alignment groove 351. An alignment spring rod 353 is jointly installed on the alignment protrusions and the alignment link 352.

[0043] Refer to Figure 9 and Figure 10 A resetable moving rod 341 is slidably arranged on the upper edge of the alignment rod 34 in a direction perpendicular to the axis of the alignment rod 34. The lower end surface of the moving rod 341 is hinged with two abutting rods 342, and the two abutting rods 342 are in a V-shaped structure. One end of the abutting rod 342 away from the moving rod 341 is slidably arranged on the alignment rod 34. A guiding inclined surface is arranged at one end of the alignment rod 34 away from the abutting rod 342. A reset groove 343 extending left and right is arranged in the middle of the alignment rod 34. A linkage rod 344 corresponding to the reset groove 343 is installed at one end of the alignment linkage rod 352 located inside the alignment groove 351.

[0044] Refer to Figure 2 Limit protrusions are arranged below the front and rear sides of the placement frame 23 and the alignment frame 31. Limit sliding grooves 221 matching the limit protrusions are respectively arranged inside the moving grooves 22. The mutual cooperation of the limit protrusions and the limit sliding grooves 221 can limit the alignment frame 31 and the placement frame 23 to prevent the telescopic end of the bidirectional cylinder 21 and the bidirectional screw 36 from breaking due to the overturning of the alignment frame 31 and the placement frame 23.

[0045] During specific operation, after the current front axle 41 is placed, the front steering axle 42 to be assembled is moved to the opposite surface of the alignment disc 33, and the threaded holes on the mounting ears pass through the alignment rod 34. Push the front steering axle 42 to move along the alignment rod 34 through the mounting ears. During the movement of the mounting ears, the moving rod 341 is driven to move into the alignment groove 351 through the guiding inclined surface. At this time, the moving rod 341 drives the linkage rod 344 to move outwards through the hinge and makes one end of the abutting rod 342 away from the moving rod 341 abut against the inner wall of the threaded hole, so as to fix the mounting ear on the alignment rod 34 and prevent the front steering axle 42 from shaking during the alignment process.

[0046] After the front steering axle 42 is placed, rotate the bidirectional screw 36 to drive the alignment frame 31 to move towards each other, so that the alignment linkage rod 352 abuts against the mounting disc 43. At this time, the alignment spring rod 353 contracts and tightens. When the alignment linkage rod 352 abuts against the mounting disc 43, drive the alignment shaft 32 to rotate through the existing driving motor. During the rotation of the alignment shaft 32, it drives the rotation through the alignment disc 33. Furthermore, the alignment disc 33 drives the alignment linkage rod 352 to rotate through the alignment rod 34. When the alignment linkage rod 352 enters the mounting hole 44 on the mounting disc 43 during the rotation process, turn off the driving motor. At this time, the alignment spring rod 353 resets and drives the alignment linkage rod 352 to move into the mounting hole 44 of the mounting disc 43. At this time, the alignment rod 34 synchronously drives the threaded hole to align with the central axis of the mounting hole 44 on the mounting disc 43.

[0047] The upper end surface of the reset groove 343 is set as an inclined plane. Manually pass the fastening bolt through the mounting hole 44 on the mounting disc 43 and into the threaded hole. During the rotation of the fastening bolt, the alignment connecting rod 352 is driven to move into the alignment groove 351. During the movement of the alignment connecting rod 352, the linkage rod 344 is driven to contact the inclined plane inside the reset groove 343. The linkage rod 344 drives the moving rod 341 to move upward through the reset groove 343, and the pressing rod 342 synchronously moves into the reset groove 343. At this time, the front steering axle 42 is disengaged from the locking. When the fastening bolts are installed one by one, reverse rotation of the bidirectional screw 36 can drive the alignment frame 31 to move away from each other. At this time, the circular tube front axle 4 is assembled. At this time, use the existing hoisting equipment to drive the front axle 41 to move upward. At this time, the mounting bracket 45 is disengaged from the linkage block 246, and the contraction of the reset spring rod 245 can drive the isosceles trapezoidal block 244 to move upward, and then the locking plate 243 is reset synchronously, and the front axle 41 can be taken out from the placement frame 23.

[0048] Refer to Figure 6 and Figure 11 A ball 345 is arranged on the side of the alignment connecting rod 352 away from the alignment rod 34, and a positioning plate 346 is fixedly installed on the circumferential surface of the alignment rod 34. The ball 345 can reduce the friction between the alignment connecting rod 352 and the mounting disc 43, reduce the wear of the mounting disc 43, and at the same time enable the alignment connecting rod 352 to slide smoothly on the mounting disc 43. The positioning plate 346 can limit the front steering axle 42 during its movement to prevent it from moving excessively and colliding with the alignment disc 33, playing a protective role for the front steering axle 42.

[0049] When using the above-mentioned circular tube front axle 4 assembly alignment fixture to assemble and align the circular tube front axle, the following steps are included: First step, adjustment and placement: Measure the distance between two adjacent mounting brackets 45 on the left and right. Start the bidirectional cylinder 21 to drive the placement frame 23 to slide a certain distance inside the moving groove 22. When the movement of the placement frame 23 ends, use the existing hoisting equipment to hoist the front axle 41 above the two placement frames 23, so that the front axle 41 is located inside the arc groove, and the mounting hole 44 on the mounting bracket 45 is aligned with the limiting rod 241. Then use the existing hoisting equipment to place the front axle 41 on the placement frame 23. During the placement process, the mounting hole 44 on the mounting bracket 45 passes through the limiting rod 241.

[0050] Step 2. Front axle locking and limiting: During the downward movement of the front axle 41, the mounting bracket 45 moves downward synchronously. Then, the mounting bracket 45 drives the linkage block 246 to move downward. During the downward movement of the linkage block 246, the isosceles trapezoidal block 244 is driven to move downward through the linkage rope 249. During the downward movement of the isosceles trapezoid, the reset spring rod 245 is stretched synchronously. During the downward movement of the isosceles trapezoidal block 244, the locking plate 243 can be driven to rotate around the hinge through the two inclined waists. During the continuous downward movement of the isosceles trapezoidal block 244, the locking plate 243 can be driven to abut against the mounting bracket 45. Then, the locking plate 243 can perform vertical limiting treatment on the mounting bracket 45.

[0051] Step 3. Front steering axle locking and limiting: And make the threaded hole on the mounting ear pass through the alignment rod 34, and push the front steering axle 42 to move along the alignment rod 34 through the mounting ear. During the movement of the mounting ear, the moving rod 341 is driven to move into the alignment groove 351 through the guiding inclined surface. At this time, the moving rod 341 drives the linkage rod 344 to move outward through the hinge and makes the end of the abutting rod 342 away from the moving rod 341 abut against the inner wall of the threaded hole, so as to fix the mounting ear on the alignment rod 34.

[0052] Step 4. Alignment and installation: Manually pass the fastening bolt through the installation hole 44 on the installation disc 43 and into the threaded hole.

[0053] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A round tube front axle assembly alignment tooling fixture, comprising an assembly frame, characterized in that: The upper end surface of the assembly rack is provided with a placement mechanism, and the upper end surface of the assembly rack and the left and right sides of the placement mechanism are jointly installed with a positioning mechanism, wherein; The placement mechanism comprises a bidirectional cylinder fixed to the middle of the upper end surface of the assembly frame, wherein the upper end surface of the assembly frame and the left and right sides of the bidirectional cylinder are provided with a movable groove, the inside of the movable groove is provided with a placement frame slidably, the front and rear sides of the placement frame are provided with a supporting protrusion, the upper end surface of the placement frame is provided with an arc groove extending left and right, and the supporting protrusion is provided with a locking part; The alignment mechanism comprises an alignment frame slidably arranged inside the moving groove, wherein an alignment shaft is mounted on the alignment frame through a bearing, an alignment disc is fixedly arranged on the opposite surface of the alignment shaft, a plurality of alignment rods are evenly mounted on the side of the alignment disc away from the alignment shaft, an alignment portion is mounted on the side of the reset rod away from the alignment disc, a bidirectional screw is mounted on the part of the assembly frame located between the two moving grooves through a bearing, and the left and right ends of the bidirectional screw are respectively threadedly connected to the left and right alignment frames; The locking part includes a limit rod fixed to the middle part of the upper end surface of the supporting protrusion, a locking groove extending left and right is opened on the circumferential surface of the limit rod, and a left-right symmetrical locking plate is installed on the lower end surface of the locking groove through a spring hinge, an isosceles trapezoidal block is arranged in the upper middle part of the locking groove, and a left-right symmetrical giving way groove is opened on the upper end surface of the isosceles trapezoidal block, and a reset spring rod is installed at the bottom of the giving way groove, and the upper ends of the reset spring rods are all installed on the upper end surface of the locking groove, and the left and right waists of the isosceles trapezoidal block are respectively against the opposite surfaces of the left and right locking plates; A linkage block is slidably arranged on the upper end surface of the supporting protrusion and located on the left and right sides of the limit rod. A linkage groove is opened inside the supporting protrusion and located between the two linkage blocks. A linkage plate is arranged inside the linkage groove. The left and right ends of the linkage plate are respectively fixedly connected to the left and right linkage blocks. A linkage rope is fixed on the lower end surface of the isosceles trapezoidal block. The lower end of the linkage rope passes through the limit rod and the supporting protrusion and is fixed on the upper end surface of the linkage plate.

2. The assembling and alignment tooling fixture for the front axle of a round tube according to claim 1, wherein: The alignment part includes an alignment groove opened inside the alignment rod and extending left and right. An alignment connecting rod is slidably arranged on the side of the alignment groove away from the alignment frame. An alignment protrusion is arranged inside the alignment groove. An alignment spring rod is installed on the alignment protrusion and the alignment connecting rod.

3. The assembly alignment tooling fixture for the front axle of a round tube according to claim 1, characterized in that: A resettable moving rod is slidably provided on the upper edge of the alignment rod in a direction perpendicular to the axis of the alignment rod. Two clamping rods are installed on the lower end surface of the moving rod through a hinge, and the two clamping rods are in a V-shaped structure. The end of the clamping rod away from the moving rod is slidably provided on the alignment rod. A guide slope is provided on the end of the alignment rod away from the clamping rod. A reset groove extending left and right is provided in the middle of the alignment rod, and a connecting rod corresponding to the reset groove is installed at one end of the alignment connecting rod located inside the alignment groove.

4. A round tube front axle assembly alignment tooling fixture according to claim 1, characterized in that: The opposite surfaces of the placement rack are installed with limit plates, and a fixed connecting plate is slidably arranged on the upper end surface of the limit plate. A fixed rod is installed on the side of the fixed connecting plate away from the placement rack. A return spring rod is installed together with the fixed connecting plate and the limit plate. A positioning hole is opened on the front end surface of the fixed connecting plate, and a positioning rod extending forward and backward is slidably arranged in the middle of the front end surface of the limit plate.

5. The assembly alignment tooling fixture for the front axle of a round tube according to claim 1, characterized in that: Limit protrusions are provided below the front and rear sides of the placement rack and the alignment rack, and limit sliding grooves matching the limit protrusions are formed inside the moving grooves.

6. A round tube front axle assembly alignment tooling fixture according to claim 2, characterized in that: A ball is provided on one side of the alignment connecting rod away from the alignment rod, and a positioning plate is fixedly installed on the circumferential surface of the alignment rod.

7. A circular tube front axle assembly alignment tooling fixture according to claim 1, characterized in that: Rubber pads are provided on the opposite surfaces of the locking plates, and an annular inclined surface is provided on the upper end surface of the limit rod.

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