Tool fixture for welding tricycle

Abstract

This invention provides a novel tooling fixture for welding tricycles, belonging to the technical field of welding equipment. It includes a power component, on which a transmission component is mounted. Both sides of the transmission component are connected to connecting components, each connecting component being connected to a pipe-body constraint component. Each pipe-body constraint component is connected to a bridge cup end constraint component. This invention solves the problems of existing fixtures, which mostly rely on manual operation, making it impossible to achieve synchronous and precise positioning of the pipe body and bridge cup end. This leads to coaxiality deviations between the two, resulting in poor welding quality and even component wear. Furthermore, it is difficult to control the load during locking, easily damaging the pipe workpiece due to excessive locking force or causing workpiece displacement during welding due to insufficient force. Moreover, the fixture structure is fixed and cannot be flexibly modified to adapt to different component specifications.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, and specifically relates to a novel tooling fixture for welding tricycles. Background Technology

[0002] The rear axle of a tricycle is a core transmission component that ensures the vehicle's driving stability and load-bearing capacity. The tube body of the tricycle's rear axle consists of a bridge cup and round tubes welded to both sides of the bridge cup. They are connected by welding. During the operation of the tricycle, the rear axle needs to withstand the weight of the vehicle, the impact of road bumps and the torque transmitted by the power for a long time. Therefore, the welding quality of the tube body and the end of the bridge cup directly determines the service life of the rear axle and driving safety.

[0003] Existing welding methods for bridge cups and pipe bodies are either manual or involve clamping. Most existing clamps are manually operated, making it difficult to achieve synchronized and precise positioning of the pipe body and bridge cup ends. This easily leads to coaxiality deviations, resulting in poor weld quality and even component wear. Furthermore, it is difficult to control the load during clamping, which can damage the pipe workpiece due to excessive clamping force or cause workpiece displacement during welding due to insufficient force. Moreover, the clamp structure is fixed and cannot be flexibly modified to adapt to different component specifications. Therefore, a new type of tooling fixture for tricycle welding is proposed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Given the following technical problems in the existing technology: existing fixtures are mostly manually operated, which cannot achieve synchronous and accurate positioning of the tube body and the end of the bridge cup, and are prone to coaxiality deviation between the two, resulting in poor welding quality and even causing component wear. Furthermore, it is not easy to control the load during locking, which can easily damage the tube workpiece due to excessive locking force or cause the workpiece to shift during welding due to insufficient force. Moreover, the fixture structure is fixed and cannot be flexibly changed to adapt to components of different specifications.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a novel tooling fixture for welding tricycles, including a power component, a transmission component mounted on the power component, a connecting component connected to both sides of the transmission component, a pipe body constraint component connected to each of the connecting components, and a bridge cup end constraint component connected to each of the pipe body constraint components. The power assembly includes a mounting base with a pair of sliding openings. A rotating seat 1 fixed to the mounting base is installed on the side of the sliding openings that are close to each other, and a rotating seat 2 fixed to the mounting base is installed on the side of the sliding openings that are far apart from each other. The rotating seats 2 and 1 are rotatably connected by a lead screw, and each lead screw is threaded with a threaded block.

[0007] By adopting the above technical solution, the assembly seat provides the assembly basis for the entire tooling. The assembly seat can be assembled via an additional cylinder, which can adjust the height of the assembly seat. Rotary seat one and rotary seat two together limit the rotation trajectory of the lead screw, ensuring the lead screw rotates. When the lead screw rotates, its screw engagement with the screw connector converts the rotational motion into linear motion. The sliding port limits the linear motion of the screw connector to avoid deviation. At the same time, through the sequential connection of the power component, transmission component, connecting component, tube body constraint component and bridge cup end constraint component, a complete force and motion transmission path is constructed, laying the structural foundation for the subsequent welding constraint of the tricycle rear axle.

[0008] Furthermore, the power assembly also includes a motor fixed to the central area of ​​the lower wall of the mounting base. The power end of the motor is fixed to a shaft passing through the mounting base. The upper end of the shaft is fixed to a first engagement umbrella disc. The two pairs of lead screws are fixed to each other on their sides that are close to each other, and the two pairs of lead screw blocks are fixed to each other on their sides that are far apart.

[0009] By adopting the above technical solution, the motor serves as the power source, transmitting power to the first meshing umbrella disc via the shaft, causing the first meshing umbrella disc to rotate synchronously, which in turn pulls the second meshing umbrella disc to rotate, thereby pulling the screw fixedly connected to the second meshing umbrella disc to rotate. The rotation of the screw pulls the threaded block to move linearly along the sliding opening, and the threaded block then pulls the fixed power bar to move synchronously.

[0010] Furthermore, the second interlocking umbrella disc engages with the first interlocking umbrella disc, the threaded block slides and connects to the cavity wall of the sliding port, and the power strip passes through the side wall of the mounting base.

[0011] By adopting the above technical solution, the meshing of the second meshing umbrella disc and the first meshing umbrella disc allows power to be transmitted from the motor to the lead screw. The power bar passes through the side wall of the mounting base, allowing the power bar to extend to the outside of the mounting base and connect with the transmission components.

[0012] Furthermore, the transmission assembly includes an assembly strip, the upper end of which is fixedly connected to a power strip, and an assembly ring fixedly connected to the lower end of the assembly strip. A liquid storage tank is fixedly connected inside the assembly ring, and a displacement frustum is slidably connected inside the liquid storage tank. The power end of the cylinder passes through the upper wall of the liquid storage tank and is connected to the displacement frustum. A double-section rod is fixedly connected to the upper wall of the displacement frustum, and an elastic element is installed on the periphery of the double-section rod. The upper end of the elastic element is connected to the upper part of the liquid storage tank, and the lower end of the elastic element is fixedly connected to the upper wall of the displacement frustum. One side of a traction rod is fixedly connected to the central area of ​​the lower wall of the displacement frustum, and a receiving seat is fixedly connected to the lower side of the traction rod. One side of a second traction rod is fixedly connected to the inner side of the receiving seat.

[0013] By adopting the above technical solution, the assembly strip serves as the connecting core of the transmission component. By being fixedly connected to the power strip, it transmits the linear power of the power component to the entire transmission component. The assembly ring assembles the liquid storage tank to ensure its stability. The cylinder serves as the power source, pushing or pulling the displacement platform along the inner wall of the liquid storage tank to move up and down. The double-section rod moves synchronously with the displacement platform to ensure the smooth movement of the displacement platform. The elastic element, through its own elastic deformation, assists in pulling the displacement platform back to its initial position. When the displacement platform moves, it compresses the fluid medium, allowing the fluid medium to be transmitted into the constraint component inside the pipe body, locking the pipe body.

[0014] Furthermore, the internal constraint assembly of the tube includes a hollow main column fixedly connected to the side of the traction rod two away from the receiving seat. A plurality of circular shells one are evenly spaced on the peripheral wall of the hollow main column. A T-shaped rod is slidably connected to the inner wall of the circular shell one. A buffer rod one is slidably connected to the protruding side of the T-shaped rod. An arched abutment piece one is fixedly connected to the protruding side of the buffer rod one.

[0015] By adopting the above technical solution, the main hollow column is fixedly connected to the second traction rod, which can move with the transmission component and at the same time provide an installation carrier for the first circular shell. The first circular shell is evenly distributed to ensure that the subsequent constraint force is evenly applied to the inner wall of the tube. The T-shaped rod can slide along the inner wall of the first circular shell to achieve the action of protruding outward or retracting inward. During the protrusion of the T-shaped rod, the first traction buffer rod moves together. The first buffer rod then drives the first arched abutment plate to contact the inner wall of the tube. The curved structure of the first arched abutment plate can better fit with the inner wall of the tube, which can increase the contact area and prevent excessive local force from damaging the tube. Through the simultaneous pressure of multiple sets of the first arched abutment plates, the tube is stably constrained from the inside.

[0016] Furthermore, a sliding cavity is reserved on one side of the T-shaped rod, and one side of the buffer rod is located in the sliding cavity. A sensing element is installed on the cavity wall of the sliding cavity away from the buffer rod, and an elastic element is installed between the sensing element and the buffer rod.

[0017] By adopting the above technical solution, the buffer rod 1 can slide freely in the sliding cavity 1. When the arched abutment piece 1 is in contact with the inner wall of the tube and is subjected to opposite loads, the buffer rod 1 will move into the sliding cavity 1. During the displacement of the buffer rod 1, the elastic element 3 undergoes elastic deformation, which absorbs part of the impact force and avoids damage to the tube or the arched abutment piece 1 due to excessive load during the contact. On the other hand, it keeps the arched abutment piece 1 in contact with the inner wall of the tube, enhancing the constraint stability. The sensing element detects the load of the buffer rod 1 against it in real time, reflecting the magnitude of the contact force between the arched abutment piece 1 and the inner wall of the tube. The operator can change the protrusion length of the T-shaped rod according to the feedback data of the sensing element to ensure that the contact force is within a suitable range, which satisfies the constraint requirements without damaging the workpiece.

[0018] Furthermore, the bridge cup end constraint assembly includes a connecting strip that is slidably connected to the lower edge of the assembly strip. An outer hollow rod is fixedly connected to the lower end of the connecting strip. One side of an inner sliding rod is slidably connected to the outer hollow rod. A clamping bolt for constraining the sliding rod is threaded onto the outer hollow rod. A retaining ring is fixedly connected to the other side of the inner sliding rod. A sliding ring slidably connected to the inner sliding rod is mounted on the side of the retaining ring away from the main hollow column. A plurality of transmission strips are hinged at equal intervals to the side of the sliding ring away from the retaining ring. A plurality of equally spaced transmission strips are fixedly connected to the end of the inner sliding rod. A supporting strip is slidably connected to a sliding T-shaped platform inside the supporting strip. A linkage strip is fixedly connected to the side of the sliding T-shaped platform away from the inner sliding rod. A buffer rod is slidably connected to the side of the linkage strip away from the sliding T-shaped platform. The other side of the transmission strip is hinged to the sliding T-shaped platform. One side of the sliding ring is fixedly connected to one side of the elastic element four near the main hollow column. The other side of the elastic element four is fixedly connected to the main hollow column. A sealing disc is slidably connected to the inner wall of the main hollow column and is slidably installed on the inner sliding rod. Several connecting rods are fixedly connected between the sealing disc and the sliding ring.

[0019] By adopting the above technical solution, the connecting strip fixes the bridge cup end constraint component and the transmission component assembly strip together, so that the movement of the assembly strip can pull the bridge cup end constraint component to move. The inner sliding bar can slide along the inner wall of the outer hollow bar, changing the overall protrusion length of the bridge cup end constraint component to adapt to the constraint requirements of bridge cups of different specifications. The resisting ring limits the sliding range of the sliding ring on the inner sliding bar. The elastic element four pulls the sliding ring towards the main hollow column to return to its displacement position through its own elastic force. During the displacement of the sliding ring, the sliding T-shaped platform is driven to protrude outward along the sliding path of the support strip through the hinged transmission strip. The sliding T-shaped platform pulls the linkage strip to move together, and the linkage strip then... The second buffer rod is driven to fit against the end of the bridge cup, thus constraining the end of the bridge cup. The sealing disc bears the load applied by the fluid medium, which drives the fixed rod to pull the sliding ring to slide. When adapting to different bridge cups, the inner sliding rod is pulled to slide in the outer hollow rod by loosening the clamping bolt, changing the length of the inner sliding rod protruding from the inner end of the main hollow column. When it protrudes longer, the resistance ring pulls the sliding ring to move accordingly. When it protrudes shorter, the elastic element four will pull the sliding ring to follow the displacement of the resistance ring, so that the sliding ring is tightly attached to the resistance ring. This can change the orientation of the arched abutment piece two, thereby adapting to bridge cups of different specifications. During the adjustment, the fluid medium flows accordingly.

[0020] Furthermore, a sliding cavity 2 is reserved on the linkage bar, one side of the buffer rod 2 is located in the sliding cavity 2, and an elastic element 5 is fixedly connected between the buffer rod 2 and the cavity wall of the sliding cavity 2. A T-shaped cavity matching the sliding T-shaped platform is reserved in the support bar, and the sliding T-shaped platform is slidably connected to the support bar via the concave cavity.

[0021] By adopting the above technical solution, the buffer rod 2 can slide freely in the sliding cavity 2. When the buffer rod 2 is in contact with the inner wall of the bridge cup end and is subjected to opposite loads, it can move into the sliding cavity 2 to prevent rigid collision damage to the bridge cup or the buffer rod 2. The elastic element 5 can be changed to make the displacement of the buffer rod 2 more flexible and adapt to more specifications. The T-shaped cavity of the support strip is adapted to the structure of the sliding T-shaped platform to ensure smooth sliding.

[0022] Furthermore, the connecting component includes a first connecting channel, one side of which is connected to a liquid storage tank, and an inner channel that is slidably connected to the other side of the first connecting channel. The inner channel is fixedly connected to the main hollow column, and one side of the connecting channel is connected to the inner channel. One side of the second connecting channel is fixedly connected to the lower wall of the main hollow column, and a displacement rod is slidably connected to the other side of the second connecting channel. A pressure plate is fixedly connected to the side of the displacement rod away from the second connecting channel, and an elastic element is fixedly connected between the second connecting channel and the pressure plate.

[0023] By adopting the above technical solution, the first connecting channel achieves fluid medium communication between the liquid storage tank and the main hollow column. When the displacement frustum slides in the liquid storage tank, it changes the fluid content in the liquid storage tank. The fluid is transferred to the main hollow column through the first connecting channel, which helps to drive the T-shaped rod to extend outward. The connecting channel can also serve as a fluid flow channel, sending the fluid into the second connecting channel to drive the displacement rod to extend outward. During the welding of the pipe body and the bridge cup, the pipe body is placed on the first arched abutment piece. The displacement rod pulls the pressure plate to contact the pipe body, which can apply pressure to the pipe body and connect the end of the pipe body to the bridge cup, which is conducive to the welding action. During the fluid recovery, the second elastic element pulls the displacement rod and the pressure plate back to the initial position through elastic return, which is conducive to the removal of the workpiece after the welding is completed.

[0024] Furthermore, the inner sliding rod passes through the receiving seat and the traction rod and is slidably connected to the receiving seat.

[0025] By adopting the above technical solution, the inner sliding rod passes through the bearing seat and the second traction rod, so that the movement paths of the bridge cup end constraint component and the tube body constraint component are related but do not interfere with each other, ensuring that the two can move synchronously and constrain the bridge cup end and the tube body respectively, achieving coordinated fixation of the welding part of the tricycle. The sliding connection between the inner sliding rod and the bearing seat allows the inner sliding rod to slide freely in the bearing seat, which does not affect the movement of the bearing seat with the first traction rod, and also ensures that the inner sliding rod can independently change its extension length to adapt to the constraint requirements of workpieces of different specifications.

[0026] The beneficial effects of this invention are as follows: 1. This invention utilizes a precise transmission structure of the power component, employing a motor to drive the engagement umbrella disc one and engagement umbrella disc two into engagement. The traction screw and the connecting block cooperate to achieve linear motion, while the sliding port limits deviation. The internal constraint component of the tube employs equally spaced circular shells one and arched abutment plates one. The curved structure allows for close contact with the inner wall of the tube, increasing the contact range and preventing localized damage. Simultaneously, the sensing element detects the abutment force in real time and links with the industrial control computer. Fluid is delivered via a cylinder, ensuring that the constraint force remains within the appropriate range. This prevents displacement of the tube and bridge cup, as well as over-tightening that could damage the workpiece. The sliding cooperation between the inner sliding rod and the receiving seat ensures that the internal constraint component of the tube and the end constraint component of the bridge cup move synchronously, effectively guaranteeing the coaxiality of the tube and the bridge cup and reducing deviation.

[0027] 2. In this invention, the extension length of the inner sliding rod can be flexibly adjusted by the clamping bolt on the outer hollow rod in the bridge cup end constraint assembly. With the cooperation of the elastic element four traction sliding rings following the displacement of the resistance ring, it can quickly adapt to bridge cups of different specifications.

[0028] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be achieved and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a top view of the structure according to an embodiment of the present invention; Figure 3 This is a frontal cross-sectional structural diagram of an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal constraint assembly structure of the tube according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the internal constraint component of the tube according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a cross-sectional structure of a circular shell according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the support strip according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the two-section structure of the connecting channel according to an embodiment of the present invention; Figure 9 This is a schematic diagram of a cross-sectional structure of the connection channel according to an embodiment of the present invention; Reference numerals: 100, Power assembly; 101, Mounting seat; 102, Sliding port; 103, Rotating seat one; 104, Rotating seat two; 105, Motor; 106, Engaging umbrella disc one; 107, Threaded block; 108, Engaging umbrella disc two; 109, Power bar; 1010, Lead screw; 200, Transmission assembly; 201, Assembly bar; 202, Assembly ring; 203, Liquid storage tank; 204, Cylinder; 205, Elastic element one; 206, Double-section rod; 207, Displacement frustum; 208, Traction rod one; 209, Receiving seat; 2010, Traction rod two; 300, Connecting assembly; 301, Connecting channel one; 3011, Inner channel; 302, Connecting channel; 303, Connecting channel two; 3 04. Displacement bar; 305. Elastic element two; 306. Pressure plate; 400. Internal constraint assembly; 401. Main hollow column; 402. Circular shell one; 403. T-shaped bar; 404. Sensing element; 405. Elastic element three; 406. Buffer bar one; 407. Arched abutment plate one; 500. Bridge cup end constraint assembly; 501. Connecting strip; 502. Outer hollow bar; 503. Inner sliding bar; 504. Resistance ring; 505. Sliding ring; 506. Elastic element four; 507. Supporting strip; 508. Arched abutment plate two; 509. Transmission strip; 5010. Buffer bar two; 5011. Elastic element five; 5012. Linkage strip; 5013. Sliding T-shaped platform; 5014. Sealing circular plate. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0034] Reference Figures 1-9 This invention proposes a novel tooling fixture for welding tricycles, including a power assembly 100, a transmission assembly 200 mounted on the power assembly 100, a connecting assembly 300 connected to both sides of the transmission assembly 200, a pipe body constraint assembly 400 connected to each of the connecting assemblies 300, and a bridge cup end constraint assembly 500 connected to each pipe body constraint assembly 400. The power assembly 100 includes a mounting base 101, on which a pair of sliding openings 102 are provided. A first rotating seat 103, fixed to the mounting base 101, is mounted on the side of the sliding openings 102 that are close to each other. A second rotating seat 104, fixed to the mounting base 101, is mounted on the side of the sliding openings 102 that are far apart from each other. A lead screw 1010 is rotatably connected to the first rotating seat 103 and the corresponding second rotating seat 104. Each lead screw 1010 is threaded with a threaded connecting block 107. The mounting base 101 provides the assembly foundation for the entire tooling. The mounting base 101 can be assembled via an additional cylinder, thus allowing for vertical displacement of the mounting base 101. Rotating seat 103 and rotating seat 2 104 together limit the rotation trajectory of lead screw 1010, ensuring that lead screw 1010 rotates. When lead screw 1010 rotates, its threaded engagement with threaded connector 107 converts rotational motion into linear motion, causing the two threaded connectors 107 to move away from or close to each other. Sliding port 102 limits the linear motion of threaded connector 107 to prevent deviation. At the same time, through the sequential connection of power component 100, transmission component 200, connecting component 300, tube body constraint component 400 and bridge cup end constraint component 500, a complete force and motion transmission path is constructed, laying the structural foundation for subsequent welding constraints of the tricycle rear axle.

[0035] The power assembly 100 also includes a motor 105 fixedly connected to the central area of ​​the lower wall of the mounting base 101. The power end of the motor 105 is fixedly connected to a shaft passing through the mounting base 101. The upper end of the shaft is fixedly connected to a first meshing umbrella disc 106. A pair of lead screws 1010 are fixedly connected to a second meshing umbrella disc 108 on their sides that are close to each other. A pair of wire connecting blocks 107 are fixedly connected to a power bar 109 on their sides that are far apart from each other. The motor 105 serves as a power source and transmits power to the first meshing umbrella disc 106 via the shaft, causing the first meshing umbrella disc 106 to rotate synchronously, which in turn pulls the second meshing umbrella disc 108 to rotate, thereby pulling the lead screw 1010 fixedly connected to the second meshing umbrella disc 108 to rotate. The rotation of the lead screw 1010 pulls the wire connecting block 107 to move linearly along the sliding port 102. The wire connecting block 107 then pulls the fixed power bar 109 to move synchronously.

[0036] The second biting umbrella disc 108 and the first biting umbrella disc 106 bite each other. The walls of the second biting umbrella disc 108 and the first biting umbrella disc 106 are reserved with matching biting teeth. The threaded block 107 is slidably connected to the cavity wall of the sliding port 102. The power bar 109 passes through the side wall of the mounting base 101. The biting engagement of the second biting umbrella disc 108 and the first biting umbrella disc 106 allows power to be transmitted from the motor 105 to the lead screw 1010. The power bar 109 passes through the side wall of the mounting base 101, allowing the power bar 109 to extend to the outside of the mounting base and connect with the transmission assembly 200.

[0037] The transmission assembly 200 includes an assembly strip 201. The upper end of the assembly strip 201 is fixedly connected to a power strip 109. An assembly ring 202 is fixedly connected to the lower end of the assembly strip 201. A liquid storage tank 203 is fixedly connected inside the assembly ring 202. A displacement frustum 207 is slidably connected inside the liquid storage tank 203. The power end of the cylinder 204 passes through the upper wall of the liquid storage tank 203 and is connected to the displacement frustum 207. A double-section rod 206 is fixedly connected to the upper wall of the displacement frustum 207. An elastic element 205 is installed around the periphery of the double-section rod 206. The upper end of the elastic element 205 is connected to the upper part of the liquid storage tank 203, and the lower end of the elastic element 205 is fixedly connected to the upper wall of the displacement frustum 207. One side of a traction rod 208 is fixedly connected to the central area of ​​the lower wall of the displacement frustum 207. A receiving seat 209 is fixedly connected to the lower side of the traction rod 208. One side of the inner side of the receiving seat 209 is fixedly connected to the traction rod 2010. The assembly strip 201 serves as the connecting core of the transmission component 200. By being fixedly connected to the power strip 109, it transmits the linear power of the power component 100 to the entire transmission component. The assembly ring 202 assembles the liquid storage tank 203 to ensure the stability of the liquid storage tank 203. The cylinder 204 serves as the power source, pushing or pulling the displacement frustum 207 to move up and down along the inner wall of the liquid storage tank 203. The double-section rod 206 moves synchronously with the displacement frustum 207 to ensure the smooth movement of the displacement frustum 207. The elastic element 205 assists in pulling the displacement frustum 207 back to its initial position through its own elastic deformation. When the displacement frustum 207 moves, it compresses the fluid medium, allowing the fluid medium to be transmitted into the constraint component inside the 400 pipe body, locking the pipe body.

[0038] The internal constraint assembly 400 includes a hollow main column 401 fixedly connected to the side of the traction rod 2010 away from the receiving seat 209. A plurality of circular shells 402 are evenly spaced along the periphery of the hollow main column 401. T-shaped rods 403 are slidably connected to the inner wall of each circular shell 402. A buffer rod 406 is slidably connected to the protruding side of each T-shaped rod 403. An arched abutment piece 407 is fixedly connected to the protruding side of each buffer rod 406. The hollow main column 401, fixedly connected to the traction rod 2010, can move with the transmission assembly 200 and simultaneously provides a mounting carrier for the circular shells 402. The evenly spaced circular shells 402 ensure that the subsequent constraint force is evenly applied to the inner wall of the pipe. The T-shaped rod 403 can slide along the inner wall of the cylindrical shell 402 to achieve the action of protruding outward or retracting inward. During the outward protrusion of the T-shaped rod 403, it pulls the buffer rod 406 to move together. The buffer rod 406 then drives the arched abutment piece 407 to contact the inner wall of the tube. The curved structure of the arched abutment piece 407 can better fit with the inner wall of the tube, which can increase the contact area and prevent excessive local force from damaging the tube. Through the simultaneous application of multiple sets of arched abutment pieces 407, the tube is stably constrained from the inside.

[0039] One protruding side of the T-shaped rod 403 has a pre-reserved sliding cavity. One side of the buffer rod 406 is located in the sliding cavity. A sensing element 404 is installed on the cavity wall of the sliding cavity away from the buffer rod 406. The sensing element 404 can detect the load and force. An elastic element 405 is installed between the sensing element 404 and the buffer rod 406. The buffer rod 406 can slide freely in the sliding cavity. When the arched abutment piece 407 is in contact with the inner wall of the tube and is subjected to opposite loads, the buffer rod 406 will move into the sliding cavity. The elastic element 405 is located within the sliding cavity. During displacement, elastic deformation occurs, which absorbs part of the impact force and prevents the load from being too large during the contact period, thus avoiding damage to the tube or the arched contact plate 407. On the other hand, it keeps the arched contact plate 407 in contact with the inner wall of the tube, enhancing the constraint stability. The sensing element 404 detects the load on the buffer rod 406 in real time, reflecting the magnitude of the contact force between the arched contact plate 407 and the inner wall of the tube. Based on the feedback data from the sensing element 404, the operator can adjust the protrusion length of the T-shaped rod 403 to ensure that the contact force is within a suitable range, which satisfies the constraint requirements without damaging the workpiece.

[0040] The bridge cup end restraint assembly 500 includes a connecting strip 501 that is slidably connected to the lower side of the assembly strip 201. An outer hollow rod 502 is fixedly connected to the lower end of the connecting strip 501. One side of an inner sliding rod 503 is slidably connected to the outer hollow rod 502. A clamping bolt for restraining the sliding rod 503 is threaded onto the outer hollow rod 502. A retaining ring 504 is fixedly connected to the other side of the inner sliding rod 503. A sliding ring 505, slidably connected to the inner sliding rod 503, is mounted on the side of the retaining ring 504 away from the main hollow column 401. Several transmission strips 509 are hinged at equal intervals to the side of the sliding ring 505 away from the retaining ring 504. Several equally spaced support strips 507 are fixedly connected to the end of the inner sliding rod 503. A sliding T-shaped platform is slidably connected to the inside of each support strip 507. 5013, a sliding T-shaped platform 5013 is fixedly connected to a linkage bar 5012 on the side away from the inner sliding bar 503. A buffer bar 5010 is slidably connected to the side of the linkage bar 5012 away from the sliding T-shaped platform 5013. The other side of the transmission bar 509 is hinged to the sliding T-shaped platform 5013. An elastic element 506 is fixedly connected to the side of the sliding ring 505 near the main hollow column 401. The other side of the elastic element 506 is fixedly connected to the main hollow column 401. A sealing disc 5014, slidably mounted on the inner sliding bar 503, is slidably connected to the inner wall of the main hollow column 401. Several connecting bars 5015 are fixed between the sealing disc 5014 and the sliding ring 505. The connecting bar 501 connects the end constraint assembly 500 of the bridge cup to the transmission assembly 200. The mounting strip 201 is fixed in place, allowing its movement to pull the bridge cup end restraint assembly 500. The inner sliding rod 503 can slide along the inner wall of the outer hollow rod 502, changing the overall protrusion length of the bridge cup end restraint assembly to adapt to the restraint requirements of bridge cups of different specifications. The stop ring 504 limits the sliding range of the sliding ring 505 on the inner sliding rod 503. The elastic element 4 506 pulls the sliding ring 505 back towards the main hollow column 401 via its own elastic force. During the displacement of the sliding ring 505, the hinged transmission strip 509 drives the sliding T-shaped platform 5013 to extend outward along the sliding path of the support strip 507. The sliding T-shaped platform 5013 pulls the linkage strip 5012 to move together. The linkage strip 5012 then drives the buffer rod 2 5010 and the bridge cup. The cup ends fit together, achieving constraint on the cup ends. The sealing disc 5014 bears the load applied by the fluid medium, driving the fixed rod 5015 to pull the sliding ring 505 to slide. When adapting to different cups, the inner sliding rod 503 is pulled to slide in the outer hollow rod 502 by loosening the clamping bolt, changing the length of the inner sliding rod 503 protruding from the inner end of the main hollow column 401. When it protrudes longer, the stop ring 504 pulls the sliding ring 505 to move accordingly. When it protrudes shorter, the elastic element 4 506 pulls the sliding ring 505 to follow the displacement of the stop ring 504, so that the sliding ring 505 is tightly attached to the stop ring 504. This can change the orientation of the arched abutment piece 2 508, thereby adapting to different specifications of cups. During the adjustment, the fluid medium flows accordingly.

[0041] A sliding cavity 2 is reserved on the linkage bar 5012. One side of the buffer rod 2 5010 is located in the sliding cavity 2. An elastic element 5011 is fixed between the buffer rod 2 5010 and the cavity wall of the sliding cavity 2. A T-shaped cavity matching the sliding T-shaped platform 5013 is reserved in the support bar 507. The sliding T-shaped platform 5013 is slidably connected to the support bar 507 through the concave cavity. The buffer rod 2 5010 can slide freely in the sliding cavity 2. When the buffer rod 2 5010 is in contact with the inner wall of the bridge cup end and is subjected to opposite loads, it can move into the sliding cavity 2 to prevent rigid collision damage to the bridge cup or the buffer rod 2 5010. The elastic element 5011 can be adjusted to make the displacement of the buffer rod 2 5010 more flexible and adaptable to more specifications. The T-shaped cavity of the support bar 507 is adapted to the structure of the sliding T-shaped platform 5013 to ensure smooth sliding.

[0042] The connecting component 300 includes a first connecting channel 301, one side of which is connected to the liquid storage tank 203. An inner channel 3011 is slidably connected to the other side of the first connecting channel 301. The inner channel 3011 is fixedly connected to the main hollow column 401. One side of the connecting channel 302 is connected to the inner channel 3011. One side of the second connecting channel 303 is fixedly connected to the lower wall of the main hollow column 401. A displacement rod 304 is slidably connected to the other side of the second connecting channel 303. A pressure plate 306 is fixedly connected to the side of the displacement rod 304 away from the second connecting channel 303. An elastic element 305 is fixedly connected between the second connecting channel 303 and the pressure plate 306. The first connecting channel 301 achieves fluid medium communication between the liquid storage tank 203 and the main hollow column 401. When the displacement frustum 207 in 03 slides, it changes the fluid content in the storage tank 203. The fluid is transferred to the hollow column 401 through the connecting channel 1 301, which helps to drive the T-shaped rod 403 to extend outward. The connecting channel 302 can serve as a fluid flow channel, sending the fluid into the connecting channel 2 303 to drive the displacement rod 304 to extend outward. During the welding of the tube body and the bridge cup, the tube body is placed on the arched abutment piece 1 407. The displacement rod 304 pulls the pressure plate 306 to contact the tube body, which can apply pressure to the tube body and connect the tube body and the end of the bridge cup to the abutment, which is conducive to the welding action. During the fluid recovery, the elastic element 2 305 returns to the initial position by elastically pulling the displacement rod 304 and the pressure plate 306, which is conducive to removing the workpiece after the welding is completed.

[0043] The inner sliding rod 503 passes through the support seat 209 and the second traction rod 2010 and is slidably connected to the support seat 209. The inner sliding rod 503 passes through the support seat 209 and the second traction rod 2010, so that the movement paths of the bridge cup end constraint component 500 and the tube body constraint component 400 are related but do not interfere with each other, ensuring that the two can move synchronously and constrain the bridge cup end and the tube body respectively, achieving coordinated fixation of the welding part of the tricycle. The sliding connection between the inner sliding rod 503 and the support seat 209 allows the inner sliding rod 503 to slide freely in the support seat 209, which does not affect the movement of the support seat 209 with the first traction rod 208, and also ensures that the inner sliding rod 503 can independently change its extension length to adapt to the constraint requirements of workpieces of different specifications. The surfaces of the arched abutment piece 407 and the arched abutment piece 508 are evenly rotatably connected with several beads. This allows the tube to be rotated appropriately during the welding of the constrained tube, enabling circumferential welding of the connection between the tube and the bridge cup. During welding, partial welding can be performed first, thus fixing the tube and the bridge cup relatively, and then circumferential welding can be performed, with the beads assisting in the rotation.

[0044] The specific implementation method is as follows: The tooling fixture uses the power component 100 as the power core and the assembly seat 101 as the basic support. The orientation can be changed by the height displacement of the additional cylinder. After the motor 105 is powered on, it pulls the first biting umbrella plate 106 to rotate through the shaft. Through the biting umbrella plate 108 and the biting umbrella plate 106, the pulling screw 1010 rotates. The sliding port 102 constrains the wire joint block 107 to shift. The wire joint block 107 is pulled to shift by the screw 1010. The wire joint block 107 then pulls the power bar 109 to protrude out of the assembly seat 101. Then the tube body is inserted into the tube body constraint component 400. Then the motor 105 pulls the first biting umbrella plate 106 to rotate in the opposite direction, so that the power bar 109 is retracted into the assembly seat 101. At this time, the tube body follows the movement. When it is displaced to a suitable position, the movement stops. Then the two ends of the bridge cup are respectively placed on the bridge cup end constraint component 500. At this time, based on the weight of the pipe body and the bridge cup, the constraint assembly 400 inside the pipe body will be pulled down as a whole. During this period, the connecting bar 501, the traction rod 208, and the inner channel 3011 slide and change accordingly. Under the influence of gravity, the traction rod 208 is pulled down, and the fluid in the lower part of the displacement frustum 207 is transported to the main hollow column 401 through the connecting channel 301 and the inner channel 3011. In the main hollow column 401, the fluid is distributed to each of the round shells 402. Then, the T-shaped rod 403 is pressed to pull the buffer rod 406 and the arched abutment piece 407 to protrude and fit against the inner wall of the pipe body. At the same time, the sealing round piece 5014 will also be displaced. The load applied at this time will cause the sensing element 404 to react through the elastic element 3 405. The sensing element 404 can be electrically connected to the industrial control computer, and the value of the sensing element 404 can be displayed on the industrial control computer. During the period when the requirements are not met, that is, the operation of cylinder 204 drives the displacement frustum 207 to slide along the inner wall of the liquid storage tank 203, and then delivers fluid into the main hollow column 401. The continuous input makes the buffer rod 406 and the inner wall of the tube tightly fit together. When the set value is reached, the operation of cylinder 204 stops. At this time, the tube is clamped securely and appropriately. At the same time, during the fluid delivery of cylinder 204, the fluid drives the sealing disc 5014 to pull the sliding ring 505 to move via the fixed rod 5015. The sliding ring 505 then drives the sliding T-shaped platform and the linkage bar 5012 to slide via the hinged transmission bar 509, so that the buffer rod 5010 fits the end of the bridge cup. The elastic element 5011 assists the buffer rod 5010 to flexibly adapt and keep it in contact. The elastic element 4 506 then pulls the sliding ring 505 back to the initial position. Furthermore, the fluid enters the connecting channel 303 through the connecting channel 302, causing the displacement bar 304 to extend out and pull the pressure plate 306 to contact the pipe body, pressing the pipe body against the end of the bridge cup, providing initial positioning for welding, and directly aligning the ends of the bridge cup and the pipe body, which is beneficial for welding the pipe body and the bridge cup.

[0045] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A jig fixture for welding a trike, comprising a power pack (100), characterized in that, The power assembly (100) is equipped with a transmission assembly (200), and both sides of the transmission assembly (200) are connected to a connecting assembly (300). Each connecting assembly (300) is connected to a pipe body constraint assembly (400), and each pipe body constraint assembly (400) is connected to a bridge cup end constraint assembly (500). The power assembly (100) includes a mounting base (101), and a pair of sliding ports (102) are reserved on the mounting base (101). A rotating seat one (103) fixed to the mounting base (101) is installed on the side of the sliding ports (102) that are close to each other, and a rotating seat two (104) fixed to the mounting base (101) is installed on the side of the sliding ports (102) that are far apart from each other. A lead screw (1010) is rotatably connected between the rotating seat two (104) and the rotating seat one (103) that are correspondingly installed. Each lead screw (1010) is threaded with a threaded block (107). The transmission assembly (200) includes an assembly strip (201), the upper end of which is fixedly connected to a power strip (109). An assembly ring (202) is fixedly connected to the lower end of the assembly strip (201). A liquid storage tank (203) is fixedly connected inside the assembly ring (202). A displacement frustum (207) is slidably connected inside the liquid storage tank (203). The power end of a cylinder (204) passes through the upper wall of the liquid storage tank (203) and is connected to the displacement frustum (207). A double-section rod (2) is fixedly connected to the upper wall of the displacement frustum (207). 06), an elastic element 1 (205) is installed on the periphery of the double-section rod (206). The upper end of the elastic element 1 (205) is connected to the upper part of the liquid storage tank (203). The lower end of the elastic element 1 (205) is fixed to the upper wall of the displacement frustum (207). One side of the traction rod 1 (208) is fixed to the middle area of ​​the lower wall of the displacement frustum (207). A receiving seat (209) is fixed to the lower side of the traction rod 1 (208). One side of the traction rod 2 (2010) is fixed to the inner side of the receiving seat (209). The internal constraint assembly (400) of the tube includes a hollow main column (401) fixedly connected to the side of the traction rod (2010) away from the receiving seat (209). A plurality of circular shells (402) are evenly spaced on the peripheral wall of the hollow main column (401). A T-shaped rod (403) is slidably connected to the inner wall of the circular shell (402). A buffer rod (406) is slidably connected to the protruding side of the T-shaped rod (403). An arched abutment piece (407) is fixedly connected to the protruding side of the buffer rod (406).

2. The tooling fixture for welding tricycles according to claim 1, characterized in that: The power assembly (100) also includes a motor (105) fixedly connected to the central area of ​​the lower wall of the mounting base (101). The power end of the motor (105) is fixedly connected to a shaft passing through the mounting base (101). The upper end of the shaft is fixedly connected to a first engagement umbrella disc (106). The two pairs of lead screws (1010) are fixedly connected to a second engagement umbrella disc (108) on the side that is close to each other. The two pairs of lead screw blocks (107) are fixedly connected to a power bar (109) on the side that is far away from each other.

3. The trike welding fixture of claim 2, wherein: The second interlocking umbrella disc (108) and the first interlocking umbrella disc (106) interlock with each other, the threaded block (107) is slidably connected to the cavity wall of the sliding port (102), and the power strip (109) passes through the side wall of the mounting base (101).

4. The trike welding fixture of claim 3, wherein: The T-shaped rod (403) has a sliding cavity 1 protruding from one side. One side of the buffer rod (406) is located in the sliding cavity 1. A sensing element (404) is installed on the cavity wall of the sliding cavity 1 away from the buffer rod (406). An elastic element 3 (405) is installed between the sensing element (404) and the buffer rod (406).

5. The trike welding fixture of claim 4, wherein: The bridge cup end restraint assembly (500) includes a connecting strip (501) that is slidably connected to the lower side of the assembly strip (201). An outer hollow rod (502) is fixedly connected to the lower end of the connecting strip (501). One side of an inner sliding rod (503) is slidably connected to the outer hollow rod (502). A clamping bolt for restraining the sliding rod (503) is threaded onto the outer hollow rod (502). A retaining ring (5) is fixedly connected to the other side of the inner sliding rod (503). 04), the side of the retaining ring (504) away from the main hollow column (401) is provided with a sliding ring (505) slidably connected to the inner sliding rod (503). The side of the sliding ring (505) away from the retaining ring (504) is hinged with one side of several transmission bars (509) at equal intervals. The end of the inner sliding rod (503) is fixedly connected with several support bars (507) arranged at equal intervals. The inside of the support bars (507) is slidably connected with a sliding ring. A T-shaped platform (5013) is fixedly connected to a linkage bar (5012) on the side of the sliding T-shaped platform (5013) away from the inner sliding bar (503). A second buffer bar (5010) is slidably connected to the side of the linkage bar (5012) away from the sliding T-shaped platform (5013). An arched abutment piece (508) is mounted on the second buffer bar (5010). The other side of the transmission bar (509) is hinged to the sliding T-shaped platform (5013). One side of the sliding ring (505) near the main hollow column (401) is fixedly connected to one side of the elastic element four (506), and the other side of the elastic element four (506) is fixedly connected to the main hollow column (401). The inner wall of the main hollow column (401) is slidably connected to a sealing disc (5014) that is slidably installed on the inner sliding rod (503). A number of fixing rods (5015) are fixedly connected between the sealing disc (5014) and the sliding ring (505).

6. The tooling fixture for welding tricycles according to claim 5, characterized in that: The linkage bar (5012) has a reserved sliding cavity 2. One side of the buffer rod 2 (5010) is located in the sliding cavity 2. An elastic element 5 (5011) is fixed between the buffer rod 2 (5010) and the cavity wall of the sliding cavity 2. The support bar (507) has a reserved T-shaped cavity that matches the sliding T-shaped platform (5013). The sliding T-shaped platform (5013) is slidably connected to the support bar (507) through the concave cavity.

7. A tooling fixture for welding tricycles according to claim 6, characterized in that: The connecting component (300) includes a connecting channel one (301), one side of the connecting channel one (301) is connected to the liquid storage tank (203), and the other side of the connecting channel one (301) is slidably connected to an inner channel (3011). The inner channel (3011) is fixedly connected to the main hollow column (401). One side of the connecting channel (302) is connected to the inner channel (3011). One side of the connecting channel two (303) is fixedly connected to the lower wall of the main hollow column (401). The other side of the connecting channel two (303) is slidably connected to a displacement rod (304). The side of the displacement rod (304) away from the connecting channel two (303) is fixedly connected to a pressure plate (306). An elastic element two (305) is fixedly connected between the connecting channel two (303) and the pressure plate (306).

8. A tooling fixture for welding tricycles according to claim 7, characterized in that: The inner sliding rod (503) passes through the support seat (209) and the second traction rod (2010) and is slidably connected to the support seat (209).

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