Positioning fixture for welding of automobile bodies

Abstract

This utility model provides a positioning fixture for automotive body welding, relating to the technical field of vehicle manufacturing equipment. It includes multiple positioning frames that are movable on a support platform surface via sliding grooves. An adjusting component is connected to the bottom of the positioning frames to drive their displacement. A pressing component is mounted on the middle of the support platform via a bracket, used to press down and position the vehicle frame. A distance measuring component is mounted on the surface of the adjusting component to measure the distance between two relative positioning frames. This utility model solves the technical problem of existing fixtures requiring targeted design and frequent replacement, achieving the technical effects of effectively adjusting the distance between positioning frames, positioning and clamping frames of different specifications, and measuring the distance between positioning frames.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing equipment technology, and in particular to a positioning fixture for welding automobile bodies. Background Technology

[0002] Body welding is a key step in ensuring the structural strength and assembly precision of the entire vehicle. The main function of automotive body welding positioning fixtures is to position and stably clamp various frames of the body, ensuring that the parts will not shift due to external forces or welding stress during the welding process, thereby ensuring the consistency of the weld joints, dimensional accuracy and overall structural stability.

[0003] Existing automotive body welding positioning fixtures are mostly fixed structures designed for specific applications. They are customized according to the specifications of a particular vehicle model or component, with fixed positions, spacing, and clamping dimensions for the positioning components. In actual production, operators must accurately place the component to be welded into the fixed positioning area of ​​the fixture, clamp it using a mechanical locking structure, and then perform the welding operation.

[0004] However, existing welding positioning fixtures can only correspond to one or similar frame specifications. When production needs involve different car models and different sizes of body frames, the corresponding fixtures must be replaced, resulting in high equipment replacement frequency and long preparation time. Utility Model Content

[0005] The purpose of this utility model is to provide a positioning fixture for welding automobile bodies, so as to alleviate the technical problem of the fixtures in the prior art being designed specifically for specific purposes and requiring frequent replacement.

[0006] This utility model provides a positioning fixture for automotive body welding, comprising: a support platform, a positioning frame, an adjustment component, a support frame, a pressing component, and a ranging component; Multiple positioning frames are moved and set on the surface of the support platform via sliding grooves. The adjustment component is connected to the bottom of the positioning frame to drive the positioning frame to move. A pressing component is set in the middle of the support platform via a support frame. The pressing component is used to press down and position the vehicle frame. A distance measuring component is set on the surface of the adjustment component to measure the distance between two positioning frames.

[0007] Furthermore, the adjustment assembly includes a drive disc, a rotating rod, a first turntable, a first bevel gear, a base plate, a screw, a second bevel gear, and a threaded block; The drive disc is fixedly connected to the middle of the lower surface of the support platform. The top of the drive disc is rotatably connected to a rotating rod. The other end of the rotating rod is fixedly connected to a first turntable. A first bevel gear is sleeved on the outer wall of the rotating rod. The bottom of the support platform is fixedly provided with four base plates, and each base plate is rotatably connected to the surface of the screw. A second bevel gear is provided on any two opposite screws, and the second bevel gear meshes perpendicularly with the first bevel gear. Each screw has a threaded block threaded to its outer wall. The threaded block passes through a groove on the surface of the support platform and is fixed to the bottom of the positioning frame.

[0008] Furthermore, a slot is provided on the top of the threaded block, and an insert is fixed to the bottom of the positioning frame. The insert is inserted into the slot and installed by a fixing component.

[0009] Furthermore, the fixing components include a locking block, a sliding rod, a return spring, a sliding plate, a side plate, a pull plate, and a mounting rod; The locking block is fixed to the outer wall of the upper surface of the threaded block. The locking block is equipped with a slide rod, and the slide plate and return spring are sleeved on the outside of the slide rod. The side plate of the slide plate opposite to the slide rod is connected to the side plate. The slide plate moves linearly along the side plate. The pull plate is fixed on the side plate. The side plate is connected to a mounting rod, which passes through the surface of the threaded block and inserts into the insert.

[0010] Furthermore, the ranging component includes a storage plate, a take-up roller, a scale strip, a connecting plate, and a mainspring; A receiving plate is set on the opposite side of one symmetrically arranged threaded block, and a connecting plate is set on the opposite side of another symmetrically arranged threaded block. A winding roller is set inside the receiving plate, and a scale strip and a mainspring are wound parallel to each other on the winding roller. Both ends of the scale strip and the mainspring are set between the receiving plate and the connecting plate.

[0011] Furthermore, a connecting block is fixedly connected to the bottom of the support platform, and guide rods are arranged parallel to each other on both sides of the screw. The guide rods pass through the connecting block, and one end of the guide rod is fixed to the base plate.

[0012] Furthermore, the support platform is provided with slide rails on both sides of each positioning frame, and support rods are symmetrically provided at the bottom of the positioning frame. The bottom end of the support rod is fixedly connected to a movable wheel, which slides along the slide rail.

[0013] Furthermore, the pressing assembly includes a lead screw, a second rotary table, a moving plate, and a pressing frame; One end of the lead screw is rotatably connected to the bracket in the middle of the support platform, and the other end of the lead screw is connected to a second turntable. The outer wall of the lead screw is threaded to a movable disc, and the bottom of the movable disc is fixed with several pressure brackets for pressing down the vehicle frame from the top.

[0014] Furthermore, each pressure frame is provided with a limit hole, through which a limit rod passes, and a limit plate is provided at the top of the limit rod.

[0015] Furthermore, the bottom of the support platform is fixedly connected to support legs, and the bottom of the support legs is glued with rubber anti-slip pads.

[0016] Beneficial effects: The positioning fixture for automotive body welding provided by this utility model can conveniently and effectively adjust the distance between multiple positioning frames by adjusting the settings of the components, thereby enabling welding between multiple frames and effectively producing body frames of different specifications. The adjustable settings reduce the production cost for manufacturers compared with the existing fixtures that require frequent changes.

[0017] By setting up the pressing component, multiple frames can be effectively pressed down and fixed, thereby effectively improving the stability of multiple frames during the welding process, and effectively improving the overall positioning effect of the device on the frames and the production quality of the component frames.

[0018] Furthermore, by setting up a distance measuring component, this utility model can measure the distance between multiple positioning frames, thereby enabling workers to adjust the distance between the positioning frames to match the specifications of the frame, which in turn can further improve the positioning accuracy of the frame during welding and further improve the production efficiency of the component frame. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the positioning fixture for automotive body welding provided in an embodiment of this utility model; Figure 2 A bottom view of a positioning fixture for welding automobile bodies provided in an embodiment of this utility model; Figure 3 A partial enlarged view of the positioning fixture A for welding automobile body provided in this embodiment of the utility model; Figure 4 A front view of a positioning fixture for welding automobile bodies provided in an embodiment of this utility model; Figure 5 A partial enlarged view of the positioning fixture B for welding automobile body provided in this embodiment of the utility model; Figure 6 A front view of the automotive body welding provided in an embodiment of this utility model; Figure 7 A partial enlarged view of the positioning fixture C for welding automobile bodies provided in an embodiment of this utility model.

[0021] Icons: 1-Support platform; 101-Connecting block; 102-Guide rod; 2-Positioning frame; 201-Insertion block; 202-Support rod; 203-Swivel wheel; 3-Adjusting assembly; 301-Drive disc; 302-Rotating rod; 303-First turntable; 304-First bevel gear; 305-Base plate; 306-Screw; 307-Second bevel gear; 308-Threaded block; 4-Support frame; 5-Pressing assembly; 501-Lead screw; 502-Second turntable; 503-Moving disc; 504-Pressing frame; 505-Limit rod; 506-Limiting disc; 6-Distance measuring component; 601-Storage plate; 602-Take-up roller; 603-Scale strip; 604-Connecting plate; 605-Spring; 7-Fixing component; 701-Locking block; 702-Sliding rod; 703-Return spring; 704-Slide plate; 705-Side plate; 706-Pull plate; 707-Mounting rod; 8-Supporting feet; 9-Rubber anti-slip mat. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] like Figures 1 to 7 As shown, the positioning fixture for welding automobile bodies provided by this utility model includes: a support platform 1, a positioning frame 2, an adjustment component 3, a support frame 4, a pressing component 5, and a ranging component 6. Multiple positioning frames 2 are moved and set on the surface of the support platform 1 via sliding grooves. The adjustment component 3 is connected to the bottom of the positioning frame 2 to drive the positioning frame 2 to move. The middle of the support platform 1 is set with a pressing component 5 via a support frame 4. The pressing component 5 is used to press down and position the vehicle frame. The distance measuring component 6 is set on the surface of the adjustment component 3 and is used to measure the distance between two positioning frames 2.

[0030] Specifically, the support platform 1 serves as a load-bearing element, with a circular surface and grooves along four directions that are adapted to the positioning frames 2. Multiple positioning frames 2 are slidably connected to the support platform 1 through the grooves and can move stably along the grooves. The adjustment component 3 is fixedly connected to the bottom of the support platform 1 and the bottom of the positioning frames 2, and drives the positioning frames 2 to move synchronously along the grooves through a transmission structure. A support frame 4 is vertically fixed in the middle of the upper surface of the support platform 1. The support frame 4 is frame-shaped with a circular top, and its top supports the pressing component 5, so that the pressing component 5 is suspended in the middle area above the support platform 1. The working end of the pressing component 5 can move vertically to correspond to the positioning position of the vehicle frame. The distance measuring component 6 is fixedly installed on the outer surface of the adjustment component 3 and obtains the distance data between the two through a scale.

[0031] The sliding groove and the adjustment component 3 work together to allow the positioning frame 2 to adapt to the positioning requirements of different sized vehicle frames, thus improving the equipment's versatility. The pressing component 5 is set in the middle through the support frame 4, which can form a symmetrical and balanced downward pressure on the vehicle frame, preventing deformation of the vehicle frame during positioning. The ranging component 6 provides real-time feedback on the spacing information of the positioning frame 2, making it easy for operators to quickly adjust to the preset size and reduce positioning errors.

[0032] In an embodiment of this utility model, the adjustment component 3 includes a drive disk 301, a rotating rod 302, a first turntable 303, a first bevel gear 304, a base plate 305, a screw 306, a second bevel gear 307, and a threaded block 308. The drive disk 301 is fixedly connected to the middle of the lower surface of the support platform 1. The top of the drive disk 301 is rotatably connected to the rotating rod 302. The other end of the rotating rod 302 is fixedly connected to the first turntable 303. The outer wall of the rotating rod 302 is fitted with a first bevel gear 304. The bottom of the support platform 1 is fixedly provided with four base plates 305. Each base plate 305 is rotatably connected to a screw 306. A second bevel gear 307 is provided on any two opposite screws 306. The second bevel gear 307 meshes perpendicularly with the first bevel gear 304. Each screw 306 has a threaded block 308 threadedly connected to its outer wall. The threaded block 308 passes through a groove on the surface of the support platform 1 and is fixedly connected to the bottom of the positioning frame 2.

[0033] Specifically, the drive disk 301 is vertically fixed at the center of the lower surface of the support platform 1, the rotating rod 302 is set in the vertical direction, its top end is rotatably connected to the inner top end of the drive disk 301 through a bearing, and its bottom end extends through the bottom of the drive disk 301 to the outside and is fixedly connected to the surface center of the first turntable 303, forming a manually operated first turntable 303; the first bevel gear 304 is coaxially sleeved and fixed on the outer wall of the rotating rod 302 located inside the drive disk 301, and rotates synchronously with the rotating rod 302; Four base plates 305 are trapezoidal and are vertically fixed at the four corners of the lower surface of the support platform 1. The inner surface of each base plate 305 is rotatably connected to a horizontally arranged screw 306 through a bearing. Two sets of opposite screws 306 (a total of four screws, two screws per set) are fixedly fitted with a second bevel gear 307 at the end near the drive disc 301. The four second bevel gears 307 are respectively perpendicularly meshed with the four sides of the first bevel gear 304 to form a transmission engagement. Each screw 306 has a threaded block 308 threadedly connected to its outer wall. The support platform 1 has a long groove corresponding to the position of the screw 306. The top of the threaded block 308 extends through the groove to the top of the support platform 1 and is fixedly connected to the bottom center of the positioning frame 2, so that the positioning frame 2 can be moved synchronously when the screw 306 rotates.

[0034] Through the vertical meshing structure of the first bevel gear 304 and the four second bevel gears 307, the first turntable 303 can be manually driven to drive the four screws 306 to rotate synchronously, ensuring the consistency of the positioning frame 2's displacement and improving adjustment accuracy. Integrating the transmission structure below the support platform 1 avoids interference with the upper positioning structure and saves space. Operators can intuitively control the displacement of the positioning frame 2 by rotating the turntable, reducing operational difficulty.

[0035] In an embodiment of this utility model, a slot is provided on the top of the threaded block 308, and an insert block 201 is fixedly connected to the bottom of the positioning frame 2. The insert block 201 is inserted into the slot and installed by the fixing component 7.

[0036] The fixing component 7 includes a locking block 701, a sliding rod 702, a return spring 703, a sliding plate (704), a side plate 705, a pull plate 706, and a mounting rod 707; Locking block 701 is fixed to the outer wall of the upper surface of threaded block 308. Inside locking block 701 is sliding rod 702, sliding plate 704 and return spring 703 are sleeved on the outside of sliding rod 702. The side plate 705 is connected to the side plate 704 away from sliding rod 702. Sliding plate 704 moves linearly along side plate 705. Pull plate 706 is fixed on side plate 705. The side plate 705 is connected to a mounting rod 707, which passes through the surface of the threaded block 308 and inserts into the insert block 201.

[0037] Specifically, a rectangular slot adapted to the insert block 201 is centrally located on the top end face of the threaded block 308. The insert block 201 at the bottom of the positioning frame 2 is inserted into the slot to form a plug-in fit. The locking block 701 of the fixing component 7 is U-shaped and is vertically fixed to the outer wall near the edge of the upper surface of the threaded block 308. A slide rod 702 is fixed horizontally inside the block, and the axis of the slide rod 702 is perpendicular to the center line of the threaded block 308. The sliding plate 704 is flat and has a through hole in the middle for the slide rod 702 to pass through. It is slidably fitted onto the outside of the slide rod 702. The return spring 703 is also fitted onto the outside of the slide rod 702, and its two ends abut against the inner wall of the sliding plate 704 near the inner wall of the locking block 701 and the inner side wall of the locking block 701, respectively. A side plate 705 is vertically arranged on the side of the sliding plate 704 away from the return spring 703. The threaded block 308 has a through hole for the mounting rod 707 to pass through at the corresponding position. The side wall of the insert block 201 has a positioning hole that matches the mounting rod 707. After the end of the mounting rod 707 away from the slide plate 704 passes through the through hole of the threaded block 308, it is inserted into the positioning hole of the insert block 201 to form a lock.

[0038] By engaging the insert block 201 with the slot, the positioning frame 2 and the threaded block 308 can be quickly pre-positioned, and locked in conjunction with the mounting rod 707. This ensures a secure connection and allows the mounting rod 707 to disengage from the insert block 201 by pulling the pull plate 706, which in turn causes the slide plate 704 to compress the return spring 703. This enables the positioning frame 2 to be quickly disassembled, improving the efficiency of replacing positioning frames 2 of different specifications.

[0039] In an embodiment of this utility model, the ranging component 6 includes a storage plate 601, a winding roller 602, a scale belt 603, a connecting plate 604, and a spring 605; A receiving plate 601 is provided on the opposite side of one symmetrically arranged threaded block 308, and a connecting plate 604 is provided on the opposite side of the other symmetrically arranged threaded block 308. A winding roller 602 is provided inside the receiving plate 601, and a scale strip 603 and a spring 605 are wound in parallel on the winding roller 602. Both ends of the scale strip 603 and the spring 605 are located between the receiving plate 601 and the connecting plate 604.

[0040] A connecting block 101 is fixedly connected to the bottom of the support platform 1. Guide rods 102 are arranged parallel to each other on both sides of the screw 306. The guide rods 102 pass through the connecting block 101 and one end of the guide rods 102 is fixed to the base plate 305.

[0041] The support platform 1 is provided with slide rails on both sides of each positioning frame 2. The bottom of the positioning frame 2 is symmetrically provided with support rods 202. The bottom end of the support rods 202 is fixedly connected with movable wheels 203, which slide along the slide rails.

[0042] Specifically, in the ranging component 6, the storage plate 601 is vertically fixed to the opposite side (i.e., the side that is close to each other) of one set of symmetrically arranged threaded blocks 308, and the connecting plate 604 is correspondingly fixed to the opposite side of another set of symmetrical threaded blocks 308, with the two in a horizontally opposite state. Inside the storage plate 601, a winding roller 602 is rotatably connected to the inside via bearings in the horizontal direction. The outer wall of the winding roller 602 is wound with a scale strip 603 and a spring 605 in parallel. One end of the scale strip 603 is fixed to the winding roller 602, and the other end extends horizontally and is fixedly connected to the side of the connecting plate 604. One end of the spring 605 is also fixed to the winding roller 602, and the other end is fixed to the same side of the connecting plate 604 via the connecting strip, forming an elastic winding mechanism. Through the cooperation of the spring 605 and the winding roller 602, the ranging component 6 can automatically wind and unwind the scale strip 603 as the threaded blocks 308 move, visually displaying the distance between the relative positioning frames 2. At the bottom of the support platform 1, corresponding to the position of each base plate 305, a connecting block 101 is vertically fixed. The connecting block 101 is located on the outside of the screw 306. Two guide rods 102 are arranged parallel to each other on both sides of the screw 306, and the axis of the guide rod 102 is parallel to the axis of the screw 306. The guide rod 102 passes horizontally through the connecting block 101. The sliding fit between the guide rod 102 and the connecting block 101 can provide lateral support for the movement of the threaded block 308, preventing it from shifting with the rotation of the screw 306, and ensuring that the positioning frame 2 moves stably along a straight line.

[0043] On the upper surface of the support platform 1, long strip slide rails are provided at both sides of each positioning frame 2 along the moving direction of the positioning frame 2. Support rods 202 are symmetrically and vertically fixed on both sides of the bottom of the positioning frame 2. The bottom end of the support rod 202 is rotatably connected to a movable wheel 203 through a rotating shaft. The wheel surface of the movable wheel 203 is in contact with the inner wall of the slide rail and rolls along the length of the slide rail.

[0044] In an embodiment of this utility model, the pressing component 5 includes a lead screw 501, a second turntable 502, a movable disc 503, and a pressing frame 504; One end of the lead screw 501 is rotatably connected to the middle bracket of the support platform 1, and the other end of the lead screw 501 is connected to the second turntable 502. The outer wall of the lead screw 501 is threadedly connected to the movable disk 503. Several pressure brackets 504 are fixedly connected to the bottom of the movable disk 503 for pressing down the vehicle frame from the top.

[0045] Each pressure frame 504 has a limit hole, through which a limit rod 505 passes, and a limit plate 506 is provided on the top of the limit rod 505.

[0046] The bottom of the support platform 1 is fixedly connected to a support leg 8, and the bottom of the support leg 8 is glued with a rubber anti-slip pad 9.

[0047] Specifically, the lead screw 501 is vertically oriented, with its bottom end rotatably connected to the top of the support frame 4 in the middle of the support platform 1 via a bearing. The top end extends above the support frame 4 and is fixedly connected to the center of the lower surface of the second turntable 502, forming a manual drive. The movable disk 503 is a horizontal disc with a threaded hole in its center that matches the lead screw 501. It is threadedly fitted onto the outer wall of the lead screw 501 and rises and falls vertically with the rotation of the lead screw 501. Several pressing arms 504 (preferably four) are vertically fixed at the bottom of the movable disk 503 along a circumferential or symmetrical direction. The bottom end of each pressing arm 504 is shaped like a railing adapted to the top of the vehicle frame, used to directly contact the vehicle frame. The pressing assembly 5, through the threaded engagement between the lead screw 501 and the movable disk 503, enables the lifting and lowering of the pressing arms 504. Combined with the manual operation of the second turntable 502, the downward height is controlled to adapt to the positioning requirements of vehicle frames of different thicknesses.

[0048] Each pressing frame 504 has a vertical limiting hole extending through its upper part. A limiting rod 505 is set vertically, with its bottom end fixed to the support frame 4 of the support platform 1, and its top end passing through the limiting hole and fixedly connected to the center of the lower surface of the limiting plate 506. The limiting rod 505 restricts the rotational freedom of the moving plate 503, ensuring that the pressing frame 504 always moves in the vertical direction, and avoiding uneven force on the frame body due to deviation.

[0049] Support feet 8 are vertically fixed at the four corners of the bottom of the support platform 1. The support feet 8 are columnar, and rubber anti-slip pads 9 are glued to their bottom ends with adhesive. The lower surface of the rubber anti-slip pads 9 has a rough texture.

[0050] Based on the above embodiments, the specific working process of the positioning fixture for automotive body welding of this utility model is as follows: Rotating the first turntable 303 causes the first bevel gear 304 to rotate via the rotating rod 302. The second bevel gear 307, which meshes with the first bevel gear 304, drives the screw 306 to rotate, causing the threaded block 308 to move along the slide groove, thereby driving the positioning frame 2 to move. At the same time, the scale 603 of the ranging component 6 unfolds or rewinds with the threaded block 308, displaying the distance relative to the positioning frame 2.

[0051] If the positioning frame 2 needs to be replaced, pull the pull plate 706 to disengage the mounting rod 707 from the insert block 201 and remove the old positioning frame 2; insert the insert block 201 of the new positioning frame 2 into the slot of the threaded block 308, release the pull plate 706, and the return spring 703 pushes the mounting rod 707 through the threaded block 308 and into the insert block 201.

[0052] Once ready, rotate the second turntable 502, causing the lead screw 501 to rotate, which in turn causes the moving plate 503 to descend along the limit rod 505. Simultaneously, the pressure frame 504 at the bottom of the moving plate 503 moves down, pressing down on the vehicle frame from the top to complete the positioning for subsequent welding work.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A positioning fixture for welding automobile bodies, characterized in that, include: Support platform (1), positioning frame (2), adjustment component (3), support frame (4), pressing component (5), and ranging component (6); Multiple positioning frames (2) are moved and disposed on the surface of the support platform (1) via sliding grooves. The adjustment component (3) is connected to the bottom of the positioning frame (2) to drive the positioning frame (2) to move. The middle part of the support platform (1) is provided with the pressing component (5) via the support frame (4). The pressing component (5) is used to press down and position the vehicle frame. The distance measuring component (6) is disposed on the surface of the adjustment component (3) and is used to measure the distance between the two positioning frames (2).

2. The positioning fixture for automotive body welding according to claim 1, characterized in that, The adjustment assembly (3) includes a drive disc (301), a rotating rod (302), a first turntable (303), a first bevel gear (304), a base plate (305), a screw (306), a second bevel gear (307), and a threaded block (308). The drive disk (301) is fixedly connected to the middle of the lower surface of the support platform (1). The top of the drive disk (301) is rotatably connected to the rotating rod (302). The other end of the rotating rod (302) is fixedly connected to the first turntable (303). The outer wall of the rotating rod (302) is fitted with a first bevel gear (304). The bottom of the support platform (1) is fixedly provided with four base plates (305), and each base plate (305) is rotatably connected to a screw (306). The second bevel gear (307) is provided on any two opposite screws (306), and the second bevel gear (307) meshes perpendicularly with the first bevel gear (304). The outer wall of each screw (306) is threadedly connected to the threaded block (308), and the threaded block (308) passes through a groove opened on the surface of the support platform (1) and is fixed to the bottom of the positioning frame (2).

3. The positioning fixture for automotive body welding according to claim 2, characterized in that, The top of the threaded block (308) is provided with a slot, and the bottom of the positioning frame (2) is fixed with a plug (201). The plug (201) is inserted into the slot and installed by the fixing component (7).

4. The positioning fixture for automotive body welding according to claim 3, characterized in that, The fixing component (7) includes a locking block (701), a sliding rod (702), a return spring (703), a sliding plate (704), a side plate (705), a pull plate (706), and a mounting rod (707). The locking block (701) is fixed to the outer wall of the upper surface of the threaded block (308). The sliding rod (702) is provided inside the locking block (701). The sliding plate (704) and the return spring (703) are sleeved on the outside of the sliding rod (702). The side plate (705) is connected to the side plate (704) on the side away from the sliding rod (702). The sliding plate (704) moves linearly along the side plate (705). The pull plate (706) is fixed on the side plate (705). The side plate (705) is connected to a mounting rod (707), which passes through the surface of the threaded block (308) and is inserted into the insert (201).

5. The positioning fixture for automotive body welding according to claim 2, characterized in that, The ranging component (6) includes a storage plate (601), a winding roller (602), a scale belt (603), a connecting plate (604), and a spring (605). A receiving plate (601) is provided on the opposite side of one of the symmetrically arranged threaded blocks (308), and a connecting plate (604) is provided on the opposite side of the other symmetrically arranged threaded block (308). A take-up roller (602) is provided inside the receiving plate (601), and the scale strip (603) and the spring (605) are wound in parallel on the take-up roller (602). Both ends of the scale strip (603) and the spring (605) are located between the receiving plate (601) and the connecting plate (604).

6. The positioning fixture for automotive body welding according to claim 2, characterized in that, The bottom of the support platform (1) is fixedly connected to a connecting block (101), and guide rods (102) are arranged parallel to each other on both sides of the screw (306). The guide rods (102) pass through the connecting block (101), and one end of the guide rods (102) is fixed to the base plate (305).

7. The positioning fixture for automotive body welding according to claim 1, characterized in that, The support platform (1) is provided with slide rails on both sides of each positioning frame (2). The bottom of the positioning frame (2) is symmetrically provided with support rods (202). The bottom end of the support rods (202) is fixedly connected with movable wheels (203), and the movable wheels (203) slide along the slide rails.

8. The positioning fixture for automotive body welding according to claim 1, characterized in that, The pressing assembly (5) includes a lead screw (501), a second turntable (502), a moving disc (503), and a pressing frame (504). One end of the lead screw (501) is rotatably connected to the middle bracket of the support platform (1), and the other end of the lead screw (501) is connected to the second turntable (502). The outer wall of the lead screw (501) is threadedly connected to the movable disk (503). Several of the lowering frames (504) are fixedly connected to the bottom of the movable disk (503) for pressing down the vehicle frame from the top.

9. The positioning fixture for automotive body welding according to claim 8, characterized in that, Each of the lower pressure frame (504) has a limit hole, through which a limit rod (505) passes, and a limit plate (506) is provided on the top of the limit rod (505).

10. The positioning fixture for welding automobile bodies according to claim 1, characterized in that, The bottom of the support platform (1) is fixedly connected to a support foot (8), and the bottom of the support foot (8) is glued with a rubber anti-slip pad (9).

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