Steel welding and positioning tool for fitness equipment machining

Abstract

The invention relates to the technical field of welding tools, and provides a steel welding and positioning tool for fitness equipment machining, the steel welding and positioning tool comprises a tool bottom plate and two sets of clamping units, each clamping unit comprises a first ring frame, a clamping mechanism, a second ring frame and a pushing mechanism, the first ring frame is slidably arranged at the top of the tool bottom plate, and the clamping mechanism is slidably arranged at the top of the tool bottom plate; the clamping mechanism is rotationally arranged on the inner side of the first ring frame; the clamping mechanism comprises an inner ring plate and an outer ring plate, a plurality of clamping seats are movably inserted into the outer circumferential wall of the inner ring plate, a plurality of rotating arm plates are rotatably mounted on the inner circumferential wall of the outer ring plate, and each rotating arm plate is movably connected with the corresponding clamping seat; the second ring frame is movably connected to the first ring frame through the driving mechanism, the pushing mechanism is rotationally installed on the inner side of the second ring frame, and when the driving mechanism acts, the pushing mechanism can move in the direction close to the first ring frame. On the basis, clamping and positioning of different types of steel pipes can be met, and the steel pipes can rotate in the circumferential direction after being fixed, so that the outer edges of the two steel pipes can be welded conveniently.

Description

Technical Field

[0001] The present application relates to the technical field of welding tooling, and particularly to a steel welding positioning tooling for fitness equipment processing. Background Art

[0002] With the improvement of people's living standards nowadays, the group that pays attention to exercise is gradually increasing, which makes outdoor fitness parks, gyms and other places gradually emerge, and the demand and functional requirements for fitness equipment are also increasing day by day. Fitness equipment is usually divided into two categories: single-function and comprehensive multi-function according to the number of training functions. Commonly used fitness equipment includes rowing machines, exercise bikes, steppers, treadmills, waist trainers, etc.

[0003] Most of the support structures of existing fitness equipment are welded by various steel pipes. And based on market demand and the functional requirements of the equipment itself, the steel pipes that make up the support structure include a large number of arc-shaped bent pipes and special-shaped bent pipes with multiple local bends (hereinafter collectively referred to as special-shaped pipes). When welding such steel materials, it is necessary for welders to hold the special-shaped pipes by hand, or it is necessary to design a special positioning tooling to assist in positioning the special-shaped pipes. It can be seen that the method of positioning by hand increases the operation difficulty of welders, is prone to welding defects, and makes it difficult to control the welding quality. Therefore, it is usually necessary to use a positioning tooling to clamp and position the special-shaped pipes.

[0004] Due to the variety of fitness equipment, the shapes and outer diameter sizes of the special-shaped pipes used in different types of fitness equipment are different. It is necessary to improve the design of the fixture part of the positioning tooling so that it can adapt to the clamping and positioning of various special-shaped pipes, and at the same time can also adapt to the clamping and positioning of various straight steel pipes; and, after two steel pipes are respectively fixed to the fixture part, it is necessary to butt the two steel pipes, and a circle of welding is to be performed on the outer edge of the butt joint position of the two steel pipes. Therefore, it is necessary to improve the design of the fixture part so that it can drive the steel pipes to rotate. The existing positioning tooling only has the function of clamping and positioning different types of steel pipes, or only has the function of rotating after clamping and positioning a single type of steel pipe, but the combination of the two is relatively difficult, resulting in limitations in the use of the positioning tooling and cumbersome and inconvenient operation, which needs to be improved. Summary of the Invention

[0005] Based on this, the present application provides a steel welding positioning tooling for fitness equipment processing, which can not only meet the clamping and positioning of different types of steel pipes, but also can perform circumferential rotation after the steel pipes are fixed, so as to facilitate the welding of the outer edges of the two steel pipes, and help to improve the forming quality of the welding operation.

[0006] The steel welding positioning tooling for fitness equipment processing provided by the present application adopts the following technical solutions: A steel pipe welding positioning tooling for fitness equipment processing, comprising a tooling base plate and two clamping units arranged on the tooling base plate. The two clamping units are arranged in a mirror image; the clamping unit includes a first ring frame, a clamping mechanism, a second ring frame and a pushing mechanism. The first ring frame is slidably arranged on the top of the tooling base plate, and the clamping mechanism is rotatably arranged inside the first ring frame; Among them, the clamping mechanism includes an inner ring plate and an outer ring plate connected to each other. A plurality of clamping seats are movably inserted on the outer peripheral wall of the inner ring plate, and the moving direction of the clamping seats is the same as the radial direction of the inner ring plate; a plurality of rotating arm plates are rotatably installed on the inner peripheral wall of the outer ring plate, and each rotating arm plate is movably connected to each clamping seat respectively; The second ring frame is movably connected to the first ring frame through a driving mechanism. The second ring frame and the first ring frame are coaxially arranged. The driving mechanism is used to force the second ring frame to move towards the first ring frame; the pushing mechanism is rotatably installed inside the second ring frame. When the driving mechanism acts, the pushing mechanism gradually abuts against each rotating arm plate to force each clamping seat to move inwards and jointly clamp the steel pipe.

[0007] By adopting the above technical solution, in this application, two clamping units are provided to respectively clamp and position two steel pipes. During operation, the straight steel pipe is directly placed inside the inner ring plate, or the straight section of the special-shaped pipe is placed inside the inner ring plate, so that the ports of the two steel pipes face each other. Then, control the driving mechanism to act to make the pushing mechanism move towards the first ring frame. The pushing mechanism can gradually abut against each rotating arm plate, thereby forcing each clamping seat to move inwards and close to each other, which can realize the stable clamping of the steel pipe and can adapt to the clamping and positioning of steel pipes with different diameters. Then, by forcing the two clamping units to approach each other, the ends of the two steel pipes move to a state of mutual abutment, and the welding operation of the two steel pipes can be conveniently carried out. During the welding operation, the inner ring plate and the outer ring plate can jointly rotate circumferentially around the central axis of the first ring frame, and then can drive the steel pipe to rotate circumferentially, so as to facilitate the welding and fixing of the outer edges of the two steel pipes. The operation is convenient and efficient, and at the same time helps to improve the forming quality of the welding operation.

[0008] Optionally, the rotating arm plate includes a connecting part, an intermediate part and a bearing part arranged in sequence. The rotating arm plate is rotatably connected to the outer ring plate through a rotating shaft, and the rotating shaft is arranged at the intermediate part; a sliding block is rotatably connected to the end of the connecting part, and a sliding groove is arranged on the side of the clamping seat away from the central axis of the inner ring plate. The sliding block is slidably arranged in the sliding groove; The bearing part is located on the side of the rotating arm plate close to the pushing mechanism. When the pushing mechanism moves towards the rotating arm plate, the pushing mechanism gradually abuts against each bearing part and forces each connecting part to rotate towards the inner ring plate.

[0009] By adopting the above technical solution, the rotating arm plate is rotationally connected to the outer ring plate through the rotating shaft in the middle part. When the driving mechanism acts and drives the pushing mechanism to move towards the direction close to the first ring frame, the pushing mechanism can first abut against each bearing part and force each bearing part to rotate away from the central axis of the inner ring plate. Using the lever principle, each connecting part can be driven to rotate towards the central axis of the inner ring plate, thereby driving each clamping seat to move inwards and close to each other to achieve stable clamping and positioning of the steel pipe.

[0010] Optionally, the pushing mechanism includes a pushing seat rotatably installed inside the second ring frame. The outer diameter of the pushing seat gradually increases from the end close to the first ring frame to the other end. When the driving mechanism acts, the outer peripheral wall of the pushing seat gradually abuts against each bearing part.

[0011] By adopting the above technical solution, by making the outer diameter of the pushing seat gradually increase from the end close to the first ring frame to the other end, when the pushing seat moves towards the direction close to the first ring frame, the outer wall of the pushing seat can gradually abut against the bearing parts of each rotating arm plate, thereby driving each clamping seat to move inwards and close to each other.

[0012] Optionally, multiple groups of guiding tracks are provided on the outer peripheral wall of the pushing seat, and each group of guiding tracks is correspondingly arranged with each rotating arm plate; wherein, each guiding track includes two track plates, and the distance between the two track plates gradually decreases from the end of the track plate close to the first ring frame to the other end, and the rotating arm plate is normally located between the two track plates of the corresponding guiding track.

[0013] By adopting the above technical solution, since the rotating arm plate is normally located between the two track plates of the corresponding guiding track, after the pushing seat moves towards the direction close to the first ring frame, the rotating arm plate can be matched to enter the area between the two track plates. Then, when the pushing seat is driven to rotate, the inner ring plate and the outer ring plate can rotate together with the pushing seat, so as to facilitate the smooth welding and fixing of the outer edges of the two steel pipes.

[0014] Optionally, the pushing mechanism further includes a toothed plate fixedly connected to the pushing seat, and a toothed ring portion is provided on the outer peripheral surface of the toothed plate; a rotating motor is fixed to the second ring frame, and the rotating motor is electrically connected to a foot switch for controlling start and stop; a driving gear is fixedly connected to the output shaft of the rotating motor, and the driving gear meshes with the toothed ring portion for transmission.

[0015] By adopting the above technical solution, when the rotating motor operates, the driving gear can drive the toothed ring portion engaged therewith to rotate, and then the pushing seat fixed to the toothed seat can be driven to rotate circumferentially around its own central axis to achieve the circumferential rotation of the steel pipe; based on this, the direction and position of the steel pipe can be adjusted before welding, or the steel pipe can be rotated circumferentially during the welding operation, which is convenient for welding and fixing the outer edges of the two steel pipes.

[0016] Optionally, the clamping unit further includes a fixture main board, the first ring frame is fixed to the fixture main board, and the second ring frame is slidably mounted on the fixture main board; The driving mechanism includes a connecting rod member, a first spring and a runner component. Among them, the connecting rod member movably passes through the first ring frame, and one end of the connecting rod member is fixedly connected to the second ring frame; the first spring is arranged between the first ring frame and the second ring frame and is used to force the second ring frame to move away from the first ring frame in the normal state; The runner component is rotatably mounted on the fixture main board. A chain belt structure is arranged on the outer peripheral side of the runner component. The runner component is connected to the end of the connecting rod member far from the second ring frame through the chain belt structure and is used to drive the second ring frame to move; A holding mechanism for restricting the second ring frame from moving away from the first ring frame is also provided inside the first ring frame.

[0017] By adopting the above technical solution, after the steel pipe is placed inside the inner ring plate, the operator can manually rotate the runner component and use the chain belt structure to pull the connecting rod member to move, thereby driving the second ring frame to gradually move towards the first ring frame, so that the pushing seat gradually abuts against each rotating arm plate; Moreover, the setting of the holding mechanism can limit the situation that the second ring frame retreats backward, so that the pushing seat can keep abutting against the rotating arm plate, thereby keeping the clamping seat clamping and positioning the steel pipe.

[0018] Optionally, the holding mechanism includes a movable plug post movably inserted into the first ring frame and a second spring arranged between the movable plug post and the first ring frame. The second spring is used to force the movable plug post to abut against the connecting rod member in the normal state; One end of the movable plug post is provided with a plugging portion, and an inclined guide surface is provided on the side of the plugging portion close to the second ring frame; A plurality of concave annular grooves are arranged on the outer peripheral surface of the connecting rod member at intervals along the axial direction of the connecting rod member, and the width dimension of each concave annular groove is adapted to the width of the plugging portion; The end of the movable plug post far from the plugging portion is exposed at the bottom of the first ring frame.

[0019] By adopting the above technical solution, under the elastic force of the second spring, the movable insertion post in this embodiment can make the insertion part automatically clamped in the inner concave ring groove. And because the first spring always has a force forcing the second ring frame to move away from the first ring frame, it can keep the side surface of the insertion part in contact with the inner wall of the inner concave ring groove for limiting position, achieving the effect of restricting the free movement of the connecting rod member, and further realizing the position retention of the second ring frame and the pushing seat. When the operator rotates the runner component, the second ring frame moves towards the first ring frame under the force. At this time, the inner wall of the inner concave ring groove can partially abut against the inclined guide surface, thereby guiding the insertion part to gradually disengage from the inner concave ring groove; based on this, after the connecting rod member moves forward, the insertion part can be clamped into the next inner concave ring groove, thus realizing the one-way movement of the connecting rod member. In addition, after the welding is completed, by applying force to the exposed end of the movable insertion post to make the insertion part of the movable insertion post smoothly disengage from the inner concave ring groove, at this time, the second ring frame can automatically reset under the elastic force of the first spring, and the pushing seat can release the clamping and positioning of the steel pipe after disengaging from each rotating arm plate, facilitating the removal of the steel pipe after welding.

[0020] Optionally, the clamping unit further includes a fixture main board. The first ring frame is fixed to the fixture main board, and the second ring frame is slidably mounted on the fixture main board; a sliding seat is arranged on the side surface of each fixture main board; two support stands are fixed to the top of the tooling bottom plate, and each support stand is provided with a sliding track. The two sliding tracks are inclined downward and close to each other; the two sliding seats are respectively slidably mounted on the two sliding tracks, and a telescopic rod group is commonly connected between the two fixture main boards. The axis direction of the telescopic rod group is the same as the horizontal direction; the tooling bottom plate is further provided with a lifting mechanism for driving the sliding seat to move.

[0021] By adopting the above technical solution, the setting of the telescopic rod group can connect the two fixture main boards and keep them at the same horizontal position. When two steel pipes are respectively fixed to two sets of clamping units, by controlling the lifting mechanism to act to drive the fixture main board to move, when the fixture main board gradually moves down along the sliding track, the two steel pipes can approach each other and finally keep in contact with each other, facilitating the operator to perform the welding operation on the two steel pipes.

[0022] Optionally, the lifting mechanism includes a jacking component fixed to the tooling bottom plate and a horizontal top plate connected to the movable end of the jacking component. An extension part is provided on the side surface of the sliding seat away from the fixture main board, and the extension part normally abuts against the horizontal top plate under the action of gravity.

[0023] By adopting the above technical solution, the jacking component in this embodiment is normally in the extended state, and due to the self-weight of the fixture main board, the sliding seat normally abuts against the horizontal top plate; after the jacking component retracts inward, the horizontal top plate moves downward and disengages from the sliding seat, and the sliding seat can gradually move downward along the sliding track under its own weight, and finally the two fixture main boards can make the two steel pipes abut against each other under the action of gravity, which can not only facilitate the welding operation of the two steel pipes, but also conveniently adjust the angle of one of the steel pipes, making it more convenient to use.

[0024] Optionally, the sliding track is provided with a sliding groove for the sliding seat to slide and install, the top of the sliding track is provided with a notch for the sliding seat to enter the sliding groove, and a sliding cover is slidably connected to the top of the sliding track, and the sliding cover normally abuts against the side wall of the notch under the action of gravity to close the notch.

[0025] By adopting the above technical solution, after the welding operation of the two special-shaped pipes is completed on this welding positioning tooling, since the special-shaped pipes are locally bent and it is difficult to directly take them out from the clamping unit, at this time, the operator can manually force the sliding cover to move to open the notch, and the sliding seat can disengage from the sliding groove via the notch, so that the clamping unit can smoothly disengage from the sliding track; however, moving the clamping unit can enable it to smoothly pass through the bent part of the special-shaped pipe, and then the welded steel pipe can be smoothly taken out from the welding positioning tooling.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By arranging multiple groups of clamping seats, after the driving mechanism drives the pushing seat to move, it can abut against each rotating arm plate, and then can force each clamping seat to move inward and close to each other to realize the firm clamping of the steel pipe, and can adapt to the positioning of steel pipes with different diameters; 2. By rotatably arranging the clamping mechanism inside the first ring frame, during the welding operation, the inner ring plate and the outer ring plate can jointly rotate around the central axis of the first ring frame, and then can drive the steel pipe to rotate circumferentially, so as to facilitate the smooth welding and fixing of the outer edges of the two steel pipes, with convenient operation and high efficiency, and at the same time contribute to improving the forming quality of the welding operation; 3. By slidably installing the fixture main board on the sliding track, after the lifting mechanism acts, the horizontal top plate disengages from the sliding seat, and the two fixture main boards can make the two steel pipes abut against each other under the action of gravity, which can not only facilitate the welding of the two steel pipes, but also conveniently adjust the angle of one of the steel pipes, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the embodiment of this application; Figure 2 is the back structural schematic diagram of a single clamping unit in the embodiment of this application; Figure 3It is a schematic structural diagram of the first ring frame and the clamping mechanism in the embodiment of the present application; Figure 4 It is a schematic semi-sectional structural diagram of the clamping mechanism in the embodiment of the present application; Figure 5 It is Figure 4 The enlarged view of part A in Figure 6 It is a schematic structural diagram of the second ring frame and the pushing mechanism in the embodiment of the present application; Figure 7 It is a sectional view of the first ring frame and the second ring frame in the embodiment of the present application, mainly showing the specific structure of the holding mechanism; Figure 8 It is Figure 7 The enlarged view of part A in Figure 9 It is a schematic front structural diagram of a single assembly clamping unit in the embodiment of the present application.

[0028] Explanation of reference numerals: 1, tooling base plate; 11, support stand; 12, sliding track; 121, sliding groove; 122, notch; 13, sliding cover; 14, lifting mechanism; 141, jacking component; 142, horizontal top plate; 2, clamping unit; 3, first ring frame; 31, holding mechanism; 32, movable insertion post; 321, insertion part; 322, inclined guide surface; 33, second spring; 4, clamping mechanism; 41, inner ring plate; 42, outer ring plate; 43, clamping seat; 431, sliding groove for sliding; 44, rotating arm plate; 441, connecting part; 442, middle part; 443, load-bearing part; 444, rotating shaft; 445, sliding block for sliding; 5, second ring frame; 6, pushing mechanism; 61, pushing seat; 62, guiding track; 621, track plate; 63, toothed plate; 631, toothed ring part; 64, rotating motor; 65, driving gear; 7, fixture main board; 71, sliding seat; 711, extending part; 72, telescopic rod group; 8, driving mechanism; 81, connecting rod part; 811, inner concave ring groove; 82, first spring; 83, runner component; 84, sprocket; 85, chain link. Detailed implementation manners

[0029] The following further elaborates on the present application in conjunction with the attached Figures 1-9 for further detailed description.

[0030] The embodiment of the present application discloses a steel welding positioning tooling for fitness equipment processing.

[0031] Refer to Figure 1, A steel welding positioning tooling for fitness equipment processing, including a tooling base plate 1 and a clamping unit 2. The number of clamping units 2 is set to two groups, and the two groups of clamping units 2 are arranged mirror-symmetrically on the top of the tooling base plate 1. The clamping unit 2 includes a first ring frame 3, a clamping mechanism 4, a second ring frame 5, a pushing mechanism 6 and a fixture main board 7. Among them, two support seats 11 are fixed on the top of the tooling base plate 1, and the two support seats 11 are spaced apart from each other for installing two fixture main boards 7 respectively.

[0032] At the same time, referring to Figure 2 , on the top of each support seat 11, a sliding track 12 is fixedly connected. The two sliding tracks 12 incline downward and are close to each other; each sliding track 12 is provided with a sliding groove 121, and the extending direction of the sliding groove 121 is the same as that of the sliding track 12. A notch 122 communicating with the sliding groove 121 is opened on the top of the sliding track 12, and the communicating position of the notch 122 and the sliding groove 121 is close to the higher end of the sliding groove 121; and, a freely sliding sliding cover 13 is installed on the top of the sliding track 12, and the sliding direction of the sliding cover 13 is the same as the extending direction of the sliding track 12; since the sliding track 12 is inclined as a whole, the sliding cover 13 can slide downward under its own gravity and finally abut against the side wall of the notch 122, so that the notch 122 is in a normally closed state; and when it is necessary to open the notch 122, manually forcing the sliding cover 13 to slide upward can make the sliding cover 13 smoothly leave the notch 122.

[0033] Referring to Figure 2 , a sliding seat 71 is integrally formed on the side of the fixture main board 7. The width of the sliding seat 71 is not greater than the width of the notch 122, so that the sliding seat 71 can enter the inside of the sliding groove 121 through the notch 122, and the sliding seat 71 can move along the extending direction of the sliding groove 121; it can be understood that when the sliding seats 71 of the two fixture main boards 7 both slide downward along the sliding groove 121, the two fixture main boards 7 can automatically approach each other, that is, the two groups of clamping units 2 can automatically approach. An expansion link group 72 is commonly connected between the two fixture main boards 7. The expansion link group 72 has a length expansion and contraction function, and its structure is well-known to those skilled in the art and is not the key point to be protected in this case, so it will not be elaborated in detail here; the axis direction of the expansion link group 72 is the same as the horizontal direction, and can keep the two fixture main boards 7 at the same horizontal height.

[0034] The tooling base plate 1 is provided with a lifting mechanism 14. Among them, the lifting mechanism 14 includes a jacking component 141 and a transverse top plate 142. In this embodiment, the jacking component 141 is set as a cylinder. The jacking component 141 is fixedly installed on the top surface of the tooling base plate 1, and the movable end of the jacking component 141 normally extends outwards; the number of the jacking components 141 is two, and the movable ends of the two jacking components 141 are jointly connected to the transverse top plate 142. The extending direction of the transverse top plate 142 is the same as the horizontal direction. An integrally formed extension 711 is provided on the side of the sliding seat 71 away from the fixture main board 7. Under the action of gravity, the extensions 711 of the two sliding seats 71 can normally abut against the transverse top plate 142. Based on this, when the jacking component 141 acts, the transverse top plate 142 moves downward and disengages from the two extensions 711, and the two clamping units 2 can slide downward and approach each other under the action of gravity.

[0035] Refer to Figure 3 , Figure 4 , the first ring frame 3 is fixed to the side of the fixture main board 7 away from the sliding seat 71, and thus is slidably arranged on the top of the tooling base plate 1. The clamping mechanism 4 is rotatably arranged inside the first ring frame 3. Specifically, the clamping mechanism 4 includes an inner ring plate 41 and an outer ring plate 42 which are connected to each other. A plurality of clamping seats 43 are movably inserted on the outer peripheral wall of the inner ring plate 41. In this embodiment, the specific number of the clamping seats 43 is 8. All the clamping seats 43 are arranged equidistantly around the central axis of the inner ring plate 41, and the moving direction of the clamping seats 43 is the same as the radial direction of the inner ring plate 41; it can be understood that in other feasible embodiments, the number of the clamping seats 43 can also be 6, 7 or 9, as long as the stable clamping and positioning of the steel pipe can be achieved, and it is not limited by the number shown in this embodiment.

[0036] In addition, it should be noted here that a resetting member (not shown in the figure) is provided between each clamping seat 43 and the outer ring plate 42. The resetting member can be a tension spring, a spring or a magnet arranged between the clamping seat 43 and the outer ring plate 42, which can always generate a force acting on the clamping seat 43 and force the clamping seat 43 to move towards the direction close to the outer ring plate 42 to ensure that each clamping seat 43 is normally away from each other, which is helpful for the smooth installation of the steel pipe.

[0037] A plurality of rotating arm plates 44 are rotatably installed on the inner peripheral wall of the outer ring plate 42. The specific number of the rotating arm plates 44 is equal to the number of the clamping seats 43, and each rotating arm plate 44 is movably connected to each clamping seat 43 respectively. Specifically refer to Figure 5, the rotating arm plate 44 includes a connecting portion 441, an intermediate portion 442, and a load-bearing portion 443 that are sequentially arranged and integrally formed. The intermediate portion 442 is fixedly penetrated by a rotating shaft 444, and the rotating arm plate 44 is rotatably connected to the inner wall of the outer ring plate 42 through the rotating shaft 444. A sliding block 445 is rotatably connected to the end of the connecting portion 441, and the sliding block 445 is wedge-shaped; a sliding groove 431 is formed on one side of the clamping seat 43 away from the central axis of the inner ring plate 41. The extending direction of the sliding groove 431 is the same as the axial direction of the inner ring plate 41, and the sliding block 445 is fitted and clamped in the sliding groove 431 and can slide along the sliding groove 431.

[0038] Referring to Figure 3 , the second ring frame 5 is slidably installed on the fixture main board 7 through a slide rail, and the second ring frame 5 is coaxially arranged with the first ring frame 3; the second ring frame 5 is movably connected to the first ring frame 3 through a driving mechanism 8 for forcing the second ring frame 5 to move towards the first ring frame 3; also referring to Figure 6 , the pushing mechanism 6 is rotatably installed inside the second ring frame 5, and the load-bearing portion 443 is located on the side of the rotating arm plate 44 close to the pushing mechanism 6. When the driving mechanism 8 operates, the pushing mechanism 6 can gradually abut against each rotating arm plate 44, thereby driving each clamping seat 43 to move inward and close to each other.

[0039] Specifically referring to Figure 6 , the driving mechanism 8 includes a connecting rod member 81, a first spring 82, and a rotating wheel component 83. One end of the connecting rod member 81 is fixedly connected to the second ring frame 5, and the other end of the connecting rod member 81 movably penetrates through the first ring frame 3 and extends to the side of the first ring frame 3 away from the second ring frame 5; the first spring 82 is sleeved on the connecting rod member 81, and the first spring 82 is located between the first ring frame 3 and the second ring frame 5 and can always generate an elastic force acting on the second ring frame 5 to force the second ring frame 5 to move away from the first ring frame 3.

[0040] The rotating wheel component 83 is rotatably installed on the fixture main board 7, and a chain belt structure is provided between the rotating wheel component 83 and the connecting rod member 81; the chain belt structure includes a sprocket 84 and a chain link 85. Among them, the sprocket 84 is coaxially fixed to the rotating wheel component 83, one end of the chain link 85 is fixed to the outer peripheral side of the sprocket 84, and the other end of the chain link 85 is wound around the sprocket 84 and connected to the end of the connecting rod member 81 away from the second ring frame 5. Therefore, when an operator manually rotates the rotating wheel component 83, the connecting rod member 81 can be smoothly pulled to drive the second ring frame 5 to move towards the first ring frame 3.

[0041] Referring to Figure 7 , Figure 8, a retaining mechanism 31 is further provided inside the first ring frame 3 for restricting the second ring frame 5 from moving away from the first ring frame 3; specifically, the retaining mechanism 31 includes a movable insertion post 32 and a second spring 33. The movable insertion post 32 is movably inserted into the first ring frame 3, and an integrally formed insertion portion 321 is provided at the end of the movable insertion post 32. A plurality of concave annular grooves 811 are provided on the outer peripheral surface of the link member 81. All the concave annular grooves 811 are arranged at equal intervals along the axial direction of the link member 81, and the width of each concave annular groove 811 is equal to the width of the insertion portion 321. The second spring 33 is disposed between the movable insertion post 32 and the inner wall of the first ring frame 3, and can always generate an elastic force of the movable insertion post 32 to force the movable insertion post 32 to move towards the link member 81, so that the insertion portion 321 is inserted into one of the concave annular grooves 811 to restrict the movement of the link member 81.

[0042] An inclined guide surface 322 is provided on the side of the insertion portion 321 close to the second ring frame 5. After the operator rotates the runner member 83 to force the second ring frame 5 to move towards the first ring frame 3, the inner wall of the concave annular groove 811 can abut against the inclined guide surface 322 and force the movable insertion post 32 to move outwards, so as to realize the one-way movement of the second ring frame 5 and the clamping and positioning retention of the steel pipe. In addition, one end of the movable insertion post 32 away from the insertion portion 321 is exposed at the bottom of the second ring frame 5. When it is necessary to release the clamping and positioning of the steel pipe, by applying a force to the exposed end of the movable insertion post 32 to move it outwards, after the insertion portion 321 disengages from the concave annular groove 811, the second ring frame 5 can automatically reset away from the first ring frame 3 under the elastic force of the first spring 82, and further the respective clamping seats 43 are disengaged from the steel pipe, which is beneficial to the smooth removal of the steel pipe.

[0043] Returning to Figure 6 , each pushing mechanism 6 includes a pushing seat 61, and the pushing seat 61 is rotatably installed inside the second ring frame 5; the pushing seat 61 is in the shape of a rotary cylinder, and the outer diameter dimension of the pushing seat 61 gradually increases from the end close to the first ring frame 3 to the end away from the first ring frame 3. A plurality of groups of guiding tracks 62 are provided on the outer peripheral wall of the pushing seat 61. The specific number of the guiding tracks 62 is equal to the number of the rotating arm plates 44, and each group of guiding tracks 62 can be correspondingly arranged with each rotating arm plate 44.

[0044] Specifically, each guiding track 62 includes two mirror-image arranged track plates 621, and the two track plates 621 are arranged at intervals; the distance between the two track plates 621 gradually decreases from the end close to the first ring frame 3 to the other end, and the minimum distance between the two track plates 621 is equal to the width of the rotating arm plate 44; it should be noted here that the rotating arm plate 44 can always be located between the two track plates 621 of the corresponding guiding track 62.

[0045] Based on this, referring to Figure 3 、Figure 6 When an operator rotates the runner component 83 to drive the second ring frame 5 to move towards the first ring frame 3, the outer peripheral wall of the pushing seat 61 can gradually abut against each bearing part 443, and by using the lever principle, the connecting part 441 is forced to drive the clamping seat 43 to move inwards. Then, after the steel pipe is placed inside the inner ring plate 41, it can be stably clamped by each clamping seat 43 to complete positioning. At the same time, under the guidance of the guiding track 62, the rotating arm plate 44 can gradually rotate and finally fit into the rear end of the guiding track 62 and be limited by the two track plates 621, so that the clamping mechanism 4 can rotate together with the pushing seat 61.

[0046] Refer to Figure 9 Among them, one set of the pushing mechanism 6 further includes a toothed plate 63. The toothed plate 63 is fixedly connected to the side surface of the pushing seat 61, and the toothed plate 63 and the pushing seat 61 are coaxial. A toothed ring part 631 is arranged on the outer peripheral surface of the toothed plate 63. A rotating motor 64 is fixed on the second ring frame 5 where the pushing mechanism 6 is located. The output shaft of the rotating motor 64 is coaxially fixed with a driving gear 65. The driving gear 65 and the toothed ring part 631 are meshed and driven with each other, and the rotating motor 64 is also connected with a foot switch (not shown in the figure). The start and stop of the rotating motor 64 can be controlled through the foot switch.

[0047] Based on this, after two steel pipes are respectively clamped and fixed on two sets of clamping units 2, by allowing the fixture main board 7 to slide down naturally along the sliding groove 121, the two steel pipes can naturally abut against each other under the action of gravity. At this time, if there are requirements for the welding angle between the two steel pipes, the operator manually lifts the clamping unit 2 upwards, and the two steel pipes can be separated from each other. At this time, by stepping on the foot switch to drive one of the steel pipes to rotate, the welding angle between the two steel pipes can be smoothly adjusted. In addition, during the welding operation process, after local welding is performed at the abutting part of the two steel pipes, by stepping on the foot switch, the two sets of clamping mechanisms 4 can be driven to rotate together, which is beneficial to welding and fixing the outer edges of the two steel pipes, and the operation is convenient and efficient.

[0048] The above is the preferred embodiment of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A steel welding positioning tooling for fitness equipment processing, characterized in that: It includes a tooling base plate (1) and two clamping units (2) arranged on the tooling base plate (1), and the two clamping units (2) are arranged in a mirror image; the clamping unit (2) includes a first ring frame (3), a clamping mechanism (4), a second ring frame (5) and a pushing mechanism (6), the first ring frame (3) is slidably arranged on the top of the tooling base plate (1), and the clamping mechanism (4) is rotatably arranged inside the first ring frame (3); Among them, the clamping mechanism (4) includes an inner ring plate (41) and an outer ring plate (42) which are connected to each other. A plurality of clamping seats (43) are movably inserted on the outer peripheral wall of the inner ring plate (41), and the moving direction of the clamping seats (43) is the same as the radial direction of the inner ring plate (41); A plurality of rotating arm plates (44) are rotatably installed on the inner peripheral wall of the outer ring plate (42), and each rotating arm plate (44) is movably connected to each clamping seat (43); The second ring frame (5) is movably connected to the first ring frame (3) through a driving mechanism (8), the second ring frame (5) and the first ring frame (3) are coaxially arranged, and the driving mechanism (8) is used to force the second ring frame (5) to move towards the first ring frame (3); The pushing mechanism (6) is rotatably installed inside the second ring frame (5). When the driving mechanism (8) acts, the pushing mechanism (6) gradually abuts against each rotating arm plate (44) to force each clamping seat (43) to move inwards and jointly clamp the steel pipe.

2. The steel welding positioning tooling according to claim 1, wherein: The rotating arm plate (44) includes a connecting part (441), an intermediate part (442) and a bearing part (443) arranged in sequence. The rotating arm plate (44) is rotatably connected to the outer ring plate (42) through a rotating shaft (444), and the rotating shaft (444) is arranged on the intermediate part (442); A sliding block (445) is rotatably connected to the end of the connecting part (441). A sliding groove (431) is arranged on the side of the clamping seat (43) away from the central axis of the inner ring plate (41), and the sliding block (445) is slidably arranged in the sliding groove (431); The bearing part (443) is located on the side of the rotating arm plate (44) close to the pushing mechanism (6). When the pushing mechanism (6) moves towards the rotating arm plate (44), the pushing mechanism (6) gradually abuts against each bearing part (443) and forces each connecting part (441) to rotate towards the inner ring plate (41).

3. The steel welding positioning tooling according to claim 2, characterized in that: The pushing mechanism (6) includes a pushing seat (61) rotatably installed inside the second ring frame (5). The outer diameter of the pushing seat (61) gradually increases from one end close to the first ring frame (3) to the other end. When the driving mechanism (8) acts, the outer peripheral wall of the pushing seat (61) gradually abuts against each bearing part (443).

4. The steel welding positioning tooling according to claim 3, characterized in that: The outer peripheral wall of the pushing seat (61) is provided with multiple groups of guiding tracks (62), and each group of the guiding tracks (62) is correspondingly arranged with each rotating arm plate (44); wherein, each guiding track (62) includes two track plates (621), and the distance between the two track plates (621) gradually decreases from the end of the track plate (621) close to the first ring frame (3) to the other end, and the rotating arm plate (44) is normally located between the two track plates (621) of the corresponding guiding track (62).

5. The steel welding positioning tooling according to claim 4, wherein: The pushing mechanism (6) further includes a toothed plate (63) fixedly connected to the pushing seat (61), and a toothed ring portion (631) is arranged on the outer peripheral surface of the toothed plate (63); a rotating motor (64) is fixed to the second ring frame (5), and the rotating motor (64) is electrically connected to a foot switch for controlling start and stop; an output shaft of the rotating motor (64) is fixedly connected to a driving gear (65), and the driving gear (65) meshes with the toothed ring portion (631) for transmission.

6. The steel welding positioning tooling according to claim 1, characterized in that: The clamping unit (2) further includes a fixture main board (7), the first ring frame (3) is fixed to the fixture main board (7), and the second ring frame (5) is slidably installed on the fixture main board (7); The driving mechanism (8) includes a connecting rod member (81), a first spring (82) and a runner component (83), wherein, the connecting rod member (81) movably passes through the first ring frame (3), and one end of the connecting rod member (81) is fixedly connected to the second ring frame (5); the first spring (82) is arranged between the first ring frame (3) and the second ring frame (5) and is used for forcing the second ring frame (5) to normally move in a direction away from the first ring frame (3); The runner component (83) is rotatably installed on the fixture main board (7), a chain belt structure is arranged on the outer peripheral side of the runner component (83), and the runner component (83) is connected to the end of the connecting rod member (81) away from the second ring frame (5) through the chain belt structure for driving the second ring frame (5) to move; a holding mechanism (31) for restricting the second ring frame (5) from moving in a direction away from the first ring frame (3) is further arranged inside the first ring frame (3).

7. The steel welding positioning tooling according to claim 6, wherein: The holding mechanism (31) includes a movable insertion post (32) movably inserted into the first ring frame (3) and a second spring (33) arranged between the movable insertion post (32) and the first ring frame (3), and the second spring (33) is used for forcing the movable insertion post (32) to normally abut against the connecting rod member (81); One end of the movable insertion post (32) is provided with a plugging portion (321), and an inclined guide surface (322) is arranged on the side surface of the plugging portion (321) close to the second ring frame (5); a plurality of concave annular grooves (811) are arranged on the outer peripheral surface of the connecting rod member (81), and the concave annular grooves (811) are arranged at intervals along the axial direction of the connecting rod member (81), and the width dimension of each concave annular groove (811) is adapted to the width of the plugging portion (321); the end of the movable insertion post (32) away from the plugging portion (321) is exposed outside the bottom of the first ring frame (3).

8. The steel welding positioning tooling according to claim 1, characterized in that: The clamping unit (2) further includes a fixture main board (7), the first ring frame (3) is fixed to the fixture main board (7), and the second ring frame (5) is slidably mounted on the fixture main board (7); a sliding seat (71) is provided on the side surface of each fixture main board (7); Two support stands (11) are fixed to the top of the tooling bottom plate (1), each support stand (11) is provided with a sliding track (12), the two sliding tracks (12) are inclined downward and close to each other; the two sliding seats (71) are respectively slidably mounted on the two sliding tracks (12), and a telescopic rod group (72) is commonly connected between the two fixture main boards (7), and the axial direction of the telescopic rod group (72) is arranged in the same direction as the horizontal direction; the tooling bottom plate (1) is further provided with a lifting mechanism (14) for driving the sliding seat (71) to move.

9. The steel welding positioning tooling according to claim 8, characterized in that: The lifting mechanism (14) includes a jacking component (141) fixed to the tooling bottom plate (1) and a horizontal top plate (142) connected to the movable end of the jacking component (141), and an extension part (711) is provided on the side surface of the sliding seat (71) away from the fixture main board (7), and the extension part (711) normally abuts against the horizontal top plate (142) under the action of gravity.

10. The steel welding positioning tooling according to claim 8, characterized in that: The sliding track (12) is provided with a sliding groove (121) for the sliding seat (71) to be slidably mounted, a notch (122) for the sliding seat (71) to enter the sliding groove (121) is provided at the top of the sliding track (12), and a sliding cover (13) is slidably connected to the top of the sliding track (12), and the sliding cover (13) normally abuts against the side wall of the notch (122) under the action of gravity to close the notch (122).

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