Vehicle frame welding positioning device

Abstract

The invention discloses a vehicle frame welding positioning device, and particularly relates to the technical field of part welding, the vehicle frame welding positioning device comprises a mounting base and two groups of positioning power frames, two symmetrical positioning frames are mounted on one side of each group of positioning power frames, and a positioning assembly for restraining multi-directional displacement of a vehicle frame is arranged on one side of each positioning frame; the positioning assembly comprises two inclined positioning pins symmetrically installed on one side of the positioning frame, and one side of each inclined positioning pin is provided with a stable tooth plate. Two-way cross constraint can be achieved on a part between the two positioning frames through the contact face of the inclined structure of the inclined positioning pin, the inclined face can actively generate directional counter-acting force through tight contact with the part, and the transversely-inclined contact face can directly offset the force of the part deviating towards the side face; and the longitudinally inclined contact surface can firmly lock the moving trend of the part in the length direction, so that the part is always stabilized on a preset positioning reference, and the stable positioning of the positioning frame on the part is ensured.

Description

Technical Field

[0001] This invention relates to the field of parts welding technology, and specifically to a vehicle frame welding positioning device. Background Technology

[0002] Currently, the positioning equipment used in vehicle frame welding production mainly employs conventional structural designs for its core positioning components, primarily consisting of three types: vertical positioning pins, rigid support blocks, and modular positioning modules. Among these, the vertical positioning pin achieves positioning by engaging with the holes in the vehicle frame parts. It relies on the vertical contact between the hole wall and the pin body to restrict part displacement and is the most widely used basic positioning structure in the industry. In vehicle frame welding production, positioning equipment must complete the clamping and positioning process through "precise alignment of the positioning components with the parts, locking of the clamping components, and welding operations." Its core design lies in ensuring positioning accuracy through rigid contact to meet the basic dimensional requirements of vehicle frame welding. However, the vertical positioning pin requires the holes in the vehicle frame parts to be completely aligned with the pin body for assembly to be completed. Due to slight unevenness on the surface of the parts, parts are prone to jamming or failure to be clamped smoothly. This can also prevent the positioning device from forming a stable and close clamping state with the parts, affecting the subsequent processing quality of the parts. Summary of the Invention

[0003] The purpose of this invention is to provide a vehicle frame welding positioning device to address the aforementioned shortcomings in the technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a vehicle frame welding positioning device, comprising a mounting base and two sets of positioning power frames, wherein two symmetrical positioning frames are mounted on one side of each set of positioning power frames, and a positioning component for constraining multi-directional displacement of the vehicle frame is provided on one side of each positioning frame; The positioning component includes two inclined positioning pins symmetrically installed on one side of the positioning frame, and a stabilizing tooth plate is installed on one side of each of the two inclined positioning pins. Two symmetrical guide rods are installed on the side of the mounting base near the positioning power frame, and the two guide rods are used to guide the attitude of the frame. A side guide rod for guiding the top of the frame is installed at one end of the guide rod. A fine-tuning component for adjusting the inclined positioning pins with respect to the outside of the frame is provided on one side of the positioning frame. A power assembly for adjusting the guide rod circumferentially is installed on one side of the mounting base; A multi-directional component is provided between the guide rod and the positioning power frame to enable the side guide rod to move in multiple dimensions along the top of the frame. An arc guide assembly is installed on one side of the positioning frame, and the arc guide assembly is used to form an arc transition at the front end of the tilt positioning pin, so that the frame and the tilt positioning pin are in stable contact.

[0005] Preferably, the power assembly includes a positioning box fixedly connected to one side of the mounting base and a coaxial column installed at the bottom of the guide rod. A second gear is rotatably connected inside the positioning box. One end of the coaxial column extends into the interior of the positioning box and is fixedly connected to one end of the second gear. A first gear meshing with the second gear is rotatably connected to the center of the interior of the positioning box. A servo motor is fixedly connected to one side of the positioning box, and the servo motor is used to drive the first gear to rotate.

[0006] Preferably, the multi-directional assembly includes a limiting shaft mounted on one side of the side guide rod, a guide rod movably sleeved on the outside of the limiting shaft, a connecting shaft rotatably connected to one side of the positioning power frame, a support plate fixedly connected to the end of the connecting shaft away from the positioning power frame, and a sliding groove for guiding the movement of the side guide rod on one side of the support plate.

[0007] Preferably, an abutment block is installed at the end of the limiting shaft away from the side guide rod. One end of the abutment block is provided with an adjusting bolt that allows it to be loosened or locked from the limiting shaft. One end of the adjusting bolt passes through the abutment block and is screwed to one end of the limiting shaft.

[0008] Preferably, the arc guide assembly includes two mounting plates symmetrically fixedly connected to one side of the positioning frame, and a column is connected between the two mounting plates. A guide arc column is fixedly connected to the outside of the column, and the guide arc column protrudes outward along one side of the positioning frame through the action of the column, ensuring that the protrusion direction is relatively stable with the side position of the inclined positioning pin. A unidirectional assembly is provided between the mounting plate and the column to allow the guide arc column to rotate in the same direction.

[0009] Preferably, the co-directional assembly includes a ratchet disc fixedly sleeved on the outside of the column and a concentric plate fixedly connected to one end of the mounting plate. A centering shaft is movably connected to the bottom of the concentric plate. A pawl bracket that engages with the ratchet disc is fixedly sleeved on the outside of the centering shaft. A return spring is connected to one side of the pawl bracket and the top of the centering shaft.

[0010] Preferably, the fine-tuning component includes a sliding cone column fixedly connected to one side of the inclined positioning pin. The positioning frame has a guide groove on the side near the inclined positioning pin for guiding the sliding cone column to move. The guide groove is an arc-shaped structure. The inclined positioning pin moves in an arc along one side of the positioning frame through the sliding cone column. One side of the positioning frame is provided with a locking assembly that allows the sliding cone to be released or locked along the guide groove.

[0011] Preferably, the locking assembly includes a guide groove formed on one side of the positioning frame and communicating with the inside of the guide groove. The top of the side sliding cone column is provided with a threaded groove. A threaded column is screwed onto one side of the positioning frame, and one end of the threaded column is screwed into the threaded groove that matches the guide groove through the threaded groove. A rubber pad is sleeved on the outside of the threaded column, and the rubber pad is tightly engaged with one side of the positioning frame through the threaded column.

[0012] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0013] 1. The present invention can achieve bidirectional cross constraint on the parts between two positioning frames through the contact surface of the inclined structure of the inclined positioning pin. The inclined surface will actively generate directional reaction force through close contact with the parts. The laterally inclined contact surface can directly offset the force of the parts shifting to the side, while the longitudinally inclined contact surface can firmly lock the movement trend of the parts along the length direction. By simply using the geometric characteristics of the inclined surface itself, the disordered movement path of the parts can be cut off from multiple dimensions, and the parts can always be stabilized on the preset positioning reference, ensuring the stable positioning of the parts by the positioning frame. 2. Through the setting of guide rod, inclined positioning pin and stabilizing tooth plate, the stabilizing tooth plate can maintain a multi-tooth dispersed contact state on the inclined positioning pin on the inclined surface, so that the stabilizing tooth plate can independently fit with different areas of the part surface. Even if some teeth are pushed up due to local protrusion and cannot fit, the remaining teeth can still firmly bite with the flat area, build multi-point support positioning, and avoid the failure of positioning reference due to local unevenness. 3. The present invention, through the arrangement of guide rods, side guide rods, inclined positioning pins and positioning frames, makes the guide rods and side guide rods form an outward or contracting flared structure at the front end of the inclined positioning pins, forming a progressive guiding channel for the part. When the top of the part contacts the guide rods and side guide rods, the inclined surface will apply a downward component force along the inclined direction, constraining the high side from excessive lifting and forcing it to sink smoothly, while the inclined low side obtains an upward lifting force through the reverse support force of the inclined surface of the guide rod, preventing the low side from continuously falling. The two forces exert force synchronously along the axis of symmetry and counterbalance each other, finally adjusting the part to the preset horizontal posture, ensuring that the part is stably positioned between the inclined positioning pins and positioning frames; 4. The present invention, through the setting of support plate, side guide rod, guide rod and abutment block, enables the guide rod and side guide rod to be finely adjusted in groups. The group adaptation method can ensure that the guide rod and side guide rod synchronously build an unobstructed continuous guide channel. It will not cause jamming due to misalignment of the guide angle in a certain area, nor will it force the frame to "accommodate" the guide path due to forced uniform angle, ensuring that the parts can be stably positioned by the tilting positioning pin. 5. The present invention, through the setting of the guide arc column, the inclined positioning pin, the guide rod and the positioning frame, makes the guide arc column make an arc transition at the front end of the inclined positioning pin, which is used to eliminate the sharp corner at the inclined positioning pin, so that the part can smoothly enter the inclined guide area, avoid collision and jamming, ensure the continuity of the guiding process, and make the positioning frame stably position the part. 6. This invention prevents the ratchet disc from reversing by using the rigidity of the ratchet bracket itself, forming a one-way locking effect. It allows the guide column to rotate in one direction and prevents it from rotating in the opposite direction, thus avoiding conflict in the guiding direction and ensuring that the part is positioned along the preset path. 7. This invention, through the design of guide grooves, inclined positioning pins, and positioning frames, enables the inclined positioning pins to form a contour-fitting effect with the parts. When facing arc-shaped contact surfaces, the angle can be adjusted in real time to precisely match the tangential direction of the arc surface, allowing the pin to form a smooth contact with the curved surface extending along the tangent. When encountering composite inclined surfaces, it can dynamically adapt to the angle characteristics of each inclined surface according to the segment, fitting the surface morphology of different inclined segments segment by segment. This dynamic adaptation capability can maximize the contact area, upgrading the positioning reference from discrete single-point support to continuous regional locking, fundamentally strengthening the stability of the positioning frame for part positioning. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the positioning power frame of the present invention; Figure 2 This is a schematic diagram of the inclined positioning pin of the present invention; Figure 3 This is a schematic diagram of the first motion state of the guide rod and side guide rod of the present invention; Figure 4 This is a schematic diagram of the structure of the limiting shaft column of the present invention; Figure 5 This is a schematic diagram of the second motion state of the guide rod and side guide rod of the present invention; Figure 6 This is a schematic diagram of the structure of the guiding arc column of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of section A in the image; Figure 8 This is a schematic diagram of the structure of the fine-tuning component of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Mounting base; 11. Positioning power frame; 12. Positioning frame; 2. Positioning assembly; 21. Inclined positioning pin; 22. Stabilizing tooth plate; 23. Guide rod; 24. Side guide rod; 3. Power assembly; 31. Servo motor; 32. First gear; 33. Positioning box; 34. Second gear; 35. Coaxial column; 4. Multi-directional component; 41. Support plate; 42. Connecting shaft; 43. Slide groove; 44. Abutment block; 45. Adjusting bolt; 46. Limiting shaft; 5. Arc guide assembly; 51. Mounting plate; 52. Guide arc column; 53. Column; 54. Ratchet disc; 55. Concentric plate; 56. Pawl holder; 57. Centering shaft column; 58. Return spring; 6. Fine-tuning component; 61. Guide groove; 62. Side sliding cone; 63. Guide groove; 64. Rubber pad; 65. Threaded column; 66. Threaded groove. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] This invention provides, for example Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The vehicle frame welding positioning device shown includes a mounting base 1 and two sets of positioning power frames 11. Each set of positioning power frames 11 has two symmetrical positioning frames 12 installed on one side. The positioning frame 12 has a positioning component 2 on one side to constrain the multi-directional displacement of the vehicle frame. The positioning component 2 includes two inclined positioning pins 21 symmetrically installed on one side of the positioning frame 12, and a stabilizing tooth plate 22 is installed on one side of each of the two inclined positioning pins 21. Two symmetrical guide rods 23 are installed on the side of the mounting base 1 near the positioning power frame 11, and the two guide rods 23 are used to guide the attitude of the frame. A side guide rod 24 for guiding the top of the frame is installed at one end of the guide rod 23. refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the specific structure and principle of the positioning power frame 11 are existing technologies, so they are not described in detail in this application. Currently, in the positioning of vehicle frame welding, the vehicle frame positioning process is usually as follows: the vehicle frame to be welded is placed between two sets of positioning power frames 11, and then the internal power motor of the positioning power frame 11 drives the lead screw to rotate. Then the external thread of the lead screw will generate an axial component force through the meshing surface with the internal thread of the nut. Since the nut is usually restricted in its rotational freedom by the guide structure (such as guide rail or slider), it cannot rotate synchronously with the lead screw and can only move linearly along the axial direction of the lead screw, thereby pushing the positioning frame 12 connected to the nut to move and positioning the vehicle frame between the two sets of positioning power frames 11. In addition, there are two positioning power frames 11 in each set, and the number of positioning frames 12 is the same as that of the positioning power frames 11. Therefore, there are four positioning frames 12, and every two positioning frames 12 are matched with every two positioning power frames 11.

[0019] refer to Figure 3 , Figure 4 and Figure 5 As shown, a power assembly 3 for driving the guide rod 23 to adjust circumferentially is installed on one side of the mounting base 1. The power assembly 3 includes a positioning box 33 fixedly connected to one side of the mounting base 1 and a coaxial column 35 installed at the bottom of the guide rod 23. A second gear 34 is rotatably connected inside the positioning box 33. One end of the coaxial column 35 extends into the interior of the positioning box 33 and is fixedly connected to one end of the second gear 34. A first gear 32 that meshes with the second gear 34 is rotatably connected to the middle of the interior of the positioning box 33. A servo motor 31 is fixedly connected to one side of the positioning box 33, and the servo motor 31 is used to drive the first gear 32 to rotate. The number of guide rods 23 and side guide rods 24 is the same as that of the positioning frame 12, and the guide rods 23 and side guide rods 24 are distributed at both ends of the mounting base 1 to ensure the guidance of the parts.

[0020] refer to Figure 3 , Figure 4 and Figure 5 As shown, a multi-directional assembly 4 is provided between the guide rod 23 and the positioning power frame 11 to enable the side guide rod 24 to move in multiple dimensions along the top of the vehicle frame; the multi-directional assembly 4 includes a limiting shaft post 46 installed on one side of the side guide rod 24, the guide rod 23 is movably sleeved on the outside of the limiting shaft post 46, a connecting shaft post 42 is rotatably connected to one side of the positioning power frame 11, a support plate 41 is fixedly connected to the end of the connecting shaft post 42 away from the positioning power frame 11, and a sliding groove 43 is provided on one side of the support plate 41 for guiding the side guide rod 24 to move; refer to Figure 3 , Figure 4 and Figure 5As shown, a contact block 44 is installed at the end of the limiting shaft 46 away from the side guide rod 24. One end of the contact block 44 is provided with an adjusting bolt 45 to loosen or lock it from the limiting shaft 46. One end of the adjusting bolt 45 passes through the contact block 44 and is screwed to one end of the limiting shaft 46. The number of multi-directional components 4 is the same as that of the guide rod 23 and the side guide rod 24, and they are matched with each other.

[0021] refer to Figure 2 , Figure 6 and Figure 7 As shown, an arc guide assembly 5 is installed on one side of the positioning frame 12, and the arc guide assembly 5 is used to form an arc transition at the front end of the inclined positioning pin 21, so that the frame and the inclined positioning pin 21 are in stable contact. The arc guide assembly 5 includes two mounting plates 51 symmetrically fixedly connected to one side of the positioning frame 12. A column 53 is connected between the two mounting plates 51. A guide arc column 52 is fixedly connected to the outside of the column 53. The guide arc column 52 protrudes outward along one side of the positioning frame 12 through the action of the column 53, so that the protrusion direction is relatively stable with the side position of the inclined positioning pin 21. refer to Figure 2 , Figure 6 and Figure 7 As shown, a co-rotating assembly is provided between the mounting plate 51 and the column 53 to allow the guide arc column 52 to rotate in the same direction. The co-rotating assembly includes a ratchet disk 54 fixedly sleeved on the outside of the column 53 and a concentric plate 55 fixedly connected to one end of the mounting plate 51. A centering shaft column 57 is movably connected to the bottom of the concentric plate 55. A pawl bracket 56 that engages with the ratchet disk 54 is fixedly sleeved on the outside of the centering shaft column 57. A return spring 58 is connected to one side of the pawl bracket 56 and the top of the centering shaft column 57.

[0022] refer to Figure 2 and Figure 8 As shown, a fine-tuning component 6 is provided on one side of the positioning frame 12 to drive the tilting positioning pin 21 to adjust to the outside of the frame; the fine-tuning component 6 includes a side sliding cone 62 fixedly connected to one side of the tilting positioning pin 21. A guide groove 61 is provided on the side of the positioning frame 12 near the tilting positioning pin 21 to guide the side sliding cone 62 to move, and the guide groove 61 is set as an arc structure. The tilting positioning pin 21 moves in an arc along one side of the positioning frame 12 through the side sliding cone 62. refer to Figure 2 and Figure 8As shown, a locking assembly is provided on one side of the positioning frame 12 to allow the sliding cone 62 to be released or locked along the guide groove 61. The locking assembly includes a guide groove 63 that is opened on one side of the positioning frame 12 and communicates with the inside of the guide groove 61. A threaded groove 66 is opened at the top of the sliding cone 62. A threaded post 65 is screwed onto one side of the positioning frame 12, and one end of the threaded post 65 is screwed into the threaded groove 66 that matches the guide groove 63. A rubber pad 64 is sleeved on the outside of the threaded post 65, and the rubber pad 64 is tightly engaged with one side of the positioning frame 12 through the threaded post 65.

[0023] Working principle: When using; refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, when the frame needs to be stably positioned between the two positioning frames 12, firstly, the two guide rods 23 act as guides, guiding the frame gradually into the positioning area; simultaneously, the two side guide rods 24 form a limit from the top of the frame, working together with the guide rods 23 to construct a predetermined movement trajectory, ensuring that the frame moves smoothly along this trajectory between the two positioning frames 12, avoiding initial attitude deviation. As the frame continues to approach the positioning frame 12, it first passes through the guide area formed by the guide rods 23 and the side guide rods 24, and then the two inclined positioning pins 21 make contact with the outside of the frame in advance. Since the contact part of the inclined positioning pins 21 is an inclined structure, one inclined surface specifically restricts the lateral displacement of the frame, while the other inclined surface specifically constrains the longitudinal displacement. The two components form a bidirectional cross constraint covering the main offset direction, preventing the frame from shifting to any side from the source. After the tilting positioning pin 21 initially positions the frame between the two positioning frames 12, the stabilizing tooth plate 22 then fits into different areas of the frame surface. Even if there are local protrusions on the frame surface that cause some teeth to be lifted, the remaining teeth can still mesh tightly with the flat area, forming a reliable "multi-point support positioning", effectively avoiding the failure of the positioning reference due to local unevenness. At the same time, the small tooth pitch of the stabilizing tooth plate 22 can accommodate the slight undulations on the frame surface, ultimately enabling the frame to achieve stable positioning under the synergistic effect of the two positioning frames 12 and the tilting positioning pin 21, greatly improving the positioning fit and overall positioning accuracy. refer to Figure 3 , Figure 4 and Figure 5As shown, when different specifications of parts need to be adapted and the two positioning frames 12 move towards each other, firstly, the servo motor 31 starts and drives the first gear 32 to rotate inside the positioning box 33; since the first gear 32 and the two second gears 34 are always meshed, the two second gears 34 are then driven to rotate synchronously inside the positioning box 33. As the second gears 34 rotate, the two coaxial columns 35 coaxial with them rotate synchronously, thereby driving the two guide rods 23 to make a circular motion around the outside of the positioning box 33. During this process, the included angle between the two guide rods 23 gradually decreases, and at the same time, the tilt angle between them and the parts is also precisely adjusted to prepare for the subsequent orientation adaptation of the parts. refer to Figure 3 , Figure 4 and Figure 5 As shown, when the guide rod 23 rotates, its interior forms a floating fit with the limiting shaft 46, generating an upward thrust to move the limiting shaft 46. The limiting shaft 46 further drives the side guide rod 24 to slide directionally along the inside of the slide groove 43. As the side guide rod 24 moves, its exterior abuts against the inner wall of the slide groove 43, pushing the support plate 41 to rotate circumferentially along one side of the positioning power frame 11 with the connecting shaft 42 as the fulcrum. The posture of the support plate 41 gradually changes from vertical to horizontal, and during the adjustment process, it synchronously drives the side guide rod 24 to change its angle, so that the relative angle between the side guide rod 24 and the guide rod 23 changes from vertical to horizontal, and then returns from horizontal to vertical. At the same time, the contact block 44 achieves multi-dimensional linkage with the movement of the side guide rod 24, and its movement trajectory is completely synchronized with the side guide rod 24. Finally, the side guide rod 24, the contact block 44 and the guide rod 23 combine to form a Z-shaped structure. With this structure, as the guide rod 23 continues to rotate, its force on the limiting shaft 46 changes from a pushing force to a pulling force, pulling the limiting shaft 46 horizontally along one side of the support plate 41. This action causes the side guide rod 24 and the contact block 44 to move synchronously towards the outside of the part, thereby creating a pre-guiding effect on the part and ensuring that the part maintains a stable posture before entering the positioning area. refer to Figure 3 , Figure 4 and Figure 5 As shown, in addition, if it is necessary to further optimize the fit of the abutment block 44, the adjusting bolt 45 can be rotated to make it relatively move with one end of the limiting shaft 46 through thread engagement; when one end of the adjusting bolt 45 is disengaged from the abutment block 44, the abutment block 44 is in a movable state between the adjusting bolt 45 and the limiting shaft 46. At this time, the angle of the abutment block 44 can be independently fine-tuned to ensure that it can maintain a stable fit with the part according to the surface morphology of the part, and further improve the positioning adaptability. refer to Figure 2 , Figure 6 and Figure 7 As shown, when the part passes through the guide rod 23 and the side guide rod 24 and moves towards the inclined positioning pin 21 and the positioning frame 12, firstly, the guide arc post 52 makes pre-contact with the outside of the part that is about to enter the positioning area; during the continuous movement of the part, friction is generated with the surface of the guide arc post 52, which in turn drives the guide arc post 52 to rotate flexibly between the two mounting plates 51. As the guide arc post 52 rotates, the column 53 connected to it is synchronously driven, driving the ratchet disk 54 to rotate clockwise. When the ratchet disk 54 rotates in the preset direction, its outer tooth groove will abut against the return spring 58; at this time, the pawl holder 56 will smoothly slide from the current tooth groove along the tooth groove structure. The return spring 58 applies a continuous push to the side of the pawl holder 56 through its own elasticity, ensuring that the pawl holder 56 always maintains a tight and stable contact with the tooth groove of the ratchet disc 54, avoiding locking failure due to contact gap. During this process, if the ratchet disc 54 attempts to rotate in the opposite direction due to external force, the pawl holder 56 will immediately and firmly lock into the current tooth groove, directly preventing the ratchet disc 54 from reversing due to its own structural rigidity. This ultimately achieves the one-way locking function of "allowing the guide arc column 52 to rotate in the forward direction with the movement of the part and restricting its reverse rotation", ensuring that the part can only be smoothly advanced along the positioning direction, avoiding interference of back offset on subsequent positioning accuracy. refer to Figure 2 and Figure 8 As shown, when the tilting positioning pin 21 needs to contact and position with parts (such as the arc-shaped transition between longitudinal and transverse beams, or the composite inclined surface of the suspension mounting seat), since the positioning contact surfaces of these parts are mostly curved surfaces or multi-angle spliced ​​inclined surfaces, the contact angle between the tilting positioning pin 21 and the part needs to be adjusted accordingly. First, by rotating the threaded post 65, it is made to maintain thread engagement with the threaded groove 66 to unlock the positioning; then the threaded post 65 moves upward along the inside of the threaded groove 66 and the guide groove 63. During this process, the top of the threaded post 65 gradually disengages from the rubber pad 64. Immediately afterwards, the rubber pad 64, due to its own elasticity, releases the rubber pad 64. The threaded pin 65 is reset and then disengaged from the positioning frame 12, thus releasing the constraint on the angle adjustment of the tilting positioning pin 21. At this time, the tilting positioning pin 21 is pushed to make an arc-shaped movement along one side of the positioning frame 12. While the tilting positioning pin 21 is moving, it will drive the side sliding cone 62 to make an arc-shaped guide movement along the inside of the guide groove 61. At the same time, the threaded pin 65 will also move synchronously along the guide groove 63 with the movement trajectory of the tilting positioning pin 21, thus achieving precise adjustment of the contact angle between the tilting positioning pin 21 and the part, ensuring that it is completely in contact with the part.

[0024] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vehicle frame welding positioning device, comprising a mounting base (1) and two sets of positioning power frames (11), wherein two symmetrical positioning frames (12) are mounted on one side of each set of positioning power frames (11), characterized in that: The positioning frame (12) is provided with a positioning component (2) on one side to constrain the multi-directional displacement of the frame. The positioning component (2) includes two inclined positioning pins (21) symmetrically installed on one side of the positioning frame (12), and a stabilizing tooth plate (22) is installed on one side of each of the two inclined positioning pins (21). The mounting base (1) is equipped with two symmetrical guide rods (23) on the side near the positioning power frame (11), and the two guide rods (23) are used to guide the attitude of the frame. One end of the guide rod (23) is equipped with a side guide rod (24) for guiding the top of the frame. A fine adjustment component (6) is provided on one side of the positioning frame (12) to drive the inclined positioning pins (21) to adjust with the outside of the frame. A power assembly (3) for driving the guide rod (23) to adjust circumferentially is installed on one side of the mounting base (1); A multi-directional component (4) is provided between the guide rod (23) and the positioning power frame (11) to enable the side guide rod (24) to move in multiple dimensions along the top of the frame. An arc guide assembly (5) is installed on one side of the positioning frame (12), and the arc guide assembly (5) is used to form an arc transition at the front end of the inclined positioning pin (21) so that the frame and the inclined positioning pin (21) are in stable contact.

2. The vehicle frame welding positioning device according to claim 1, characterized in that: The power assembly (3) includes a positioning box (33) fixedly connected to one side of the mounting base (1) and a coaxial column (35) installed at the bottom of the guide rod (23). The positioning box (33) is rotatably connected to a second gear (34). One end of the coaxial column (35) extends into the interior of the positioning box (33) and is fixedly connected to one end of the second gear (34). The center of the interior of the positioning box (33) is rotatably connected to a first gear (32) that meshes with the second gear (34). A servo motor (31) is fixedly connected to one side of the positioning box (33), and the servo motor (31) is used to drive the first gear (32) to rotate.

3. The vehicle frame welding positioning device according to claim 2, characterized in that: The multi-directional component (4) includes a limiting shaft (46) installed on one side of the side guide rod (24), a guide rod (23) is movably sleeved on the outside of the limiting shaft (46), a connecting shaft (42) is rotatably connected to one side of the positioning power frame (11), a support plate (41) is fixedly connected to one end of the connecting shaft (42) away from the positioning power frame (11), and a groove (43) is provided on one side of the support plate (41) for guiding the side guide rod (24) to move.

4. The vehicle frame welding positioning device according to claim 3, characterized in that: The end of the limiting shaft (46) away from the side guide rod (24) is equipped with an abutment block (44). One end of the abutment block (44) is provided with an adjusting bolt (45) to loosen or lock it from the limiting shaft (46). One end of the adjusting bolt (45) passes through the abutment block (44) and is screwed to one end of the limiting shaft (46).

5. The vehicle frame welding positioning device according to claim 1, characterized in that: The arc guide assembly (5) includes two mounting plates (51) symmetrically fixedly connected to one side of the positioning frame (12). A column (53) is connected between the two mounting plates (51). A guide arc column (52) is fixedly connected to the outside of the column (53). The guide arc column (52) protrudes outward along one side of the positioning frame (12) through the action of the column (53), ensuring that the protrusion direction is relatively stable with the side position of the inclined positioning pin (21). A co-directional assembly is provided between the mounting plate (51) and the column (53) to allow the guide arc column (52) to rotate in the same direction.

6. The vehicle frame welding positioning device according to claim 5, characterized in that: The co-directional assembly includes a ratchet disc (54) fixedly sleeved on the outside of the column (53) and a concentric plate (55) fixedly connected to one end of the mounting plate (51). A centering shaft (57) is movably connected to the bottom of the concentric plate (55). A pawl bracket (56) that engages with the ratchet disc (54) is fixedly sleeved on the outside of the centering shaft (57). A return spring (58) is connected to one side of the pawl bracket (56) and the top of the centering shaft (57).

7. The vehicle frame welding positioning device according to claim 1, characterized in that: The fine-tuning component (6) includes a side-sliding cone column (62) fixedly connected to one side of the inclined positioning pin (21). The positioning frame (12) has a guide groove (61) on the side near the inclined positioning pin (21) for guiding the side-sliding cone column (62) to move. The guide groove (61) is an arc-shaped structure. The inclined positioning pin (21) moves in an arc along one side of the positioning frame (12) through the side-sliding cone column (62). The positioning frame (12) is provided with a locking assembly on one side to allow the sliding cone (62) to be released or locked along the guide groove (61).

8. The vehicle frame welding positioning device according to claim 1, characterized in that: The locking assembly includes a guide groove (63) that is opened on one side of the positioning frame (12) and communicates with the inside of the guide groove (61). The top of the side sliding cone (62) is provided with a threaded groove (66). A threaded column (65) is screwed to one side of the positioning frame (12), and one end of the threaded column (65) is screwed into the threaded groove (66) that matches the guide groove (63) through the guide groove (63). A rubber pad (64) is sleeved on the outside of the threaded column (65), and the rubber pad (64) is tightly engaged with one side of the positioning frame (12) through the threaded column (65).

Images