Three-dimensional flexible pneumatic tool clamp for welding front triangle of baby carriage frame

Abstract

The utility model discloses a three-dimensional flexible pneumatic tool clamp for welding a front triangle of a baby carriage frame, which comprises a mounting table, the mounting table is sequentially provided with a vertical pipe support, a first lower pipe support, a second lower pipe support and a head pipe support from left to right, and the top of the head pipe support, the top of the second lower pipe support and the top of the vertical pipe support are respectively provided with an air cylinder. The baby carriage frame is fixed through the air cylinder, high working precision and environment adaptability are achieved, instantaneous pressure and instantaneous flow control can be stably output, and the requirement for operation of workers is low; the air cylinder has the advantages of being high in reliability, long in service life and resistant to corrosion, and long-term stable operation of mechanical equipment can be guaranteed. And the bicycle frame is fixed more completely to a certain extent through the controllability and stability of the air cylinder, the situation of deformation cannot occur in the welding process, and the welding success rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of welding of baby carriage frames, in particular to a three-dimensional flexible pneumatic tooling fixture used for welding the front triangle of a baby carriage frame. Background Art

[0002] There are many kinds of bicycles on the market, and the sizes of various pipes are inconsistent. The pipe fixing methods of different models are also different. When clamping and fixing baby stroller pipes of different diameters, the corresponding mold sizes also need to be replaced. The existing clamp ends are usually non-detachable, so when the sizes do not meet, the entire set of clamps needs to be replaced, which increases the welding production burden and reduces the production efficiency of the enterprise. The existing fixing method usually adopts a manual press-type clamp. Although this type of clamp has a simple structure and low cost, the manual clamp requires workers to press and release continuously, and the accuracy of the manual clamp is difficult to guarantee. At the same time, the manual clamp adopts the lever principle for clamping, which can be used in some environments where the clamping force is not required. In the welding environment of the baby stroller frame, since it is necessary to ensure that the baby stroller frame does not move during welding to ensure the welding accuracy, it is necessary to have certain requirements on the clamping force of the clamp. The manual clamp with a large clamping force has a large resistance when manually clamped, and requires a large amount of force to operate, which has a high labor intensity and is not very convenient to use.

[0003] Therefore, it is urgent to design a three-dimensional flexible pneumatic fixture for welding the front triangle of a baby stroller frame to overcome the deficiencies of one or more of the above-mentioned prior arts. Utility Model Content

[0004] The technical solution adopted by the utility model to solve the above technical problems is: to provide a three-dimensional flexible pneumatic tooling fixture for welding the front triangle of a baby carriage frame, characterized in that it includes: a mounting platform, a plurality of threaded holes are arranged on the mounting platform along the length direction, and a seat tube bracket, a first down tube bracket, a second down tube bracket, and a head tube bracket are arranged on the mounting platform in sequence from left to right; the head tube bracket is located at the end of the mounting platform and is integrally connected to the mounting platform, a plurality of adjustment holes are opened on one side of the head tube bracket, a head tube supporting member is movably connected to the middle part of the head tube bracket through the adjustment hole, a head tube cylinder is movably connected to the top of the head tube bracket through the adjustment hole, and the output end of the head tube cylinder is detachably connected to the head tube The riser bracket is in a semi-enclosed rectangular shape, the bottom of the riser bracket is detachably connected to the threaded hole of the mounting platform, the lower end of the riser bracket is provided with a horizontal and opposite five-way cylinder, the output end of the five-way cylinder is detachably connected to a five-way extrusion, the top of the riser bracket is fixedly provided with a vertical riser cylinder, the output end of the riser cylinder is detachably connected to a riser extrusion; the bottom of the first down tube bracket is detachably connected to the threaded hole, a first down tube supporting member is movably provided on the first down tube bracket, a second down tube supporting member is movably provided in the middle of the second down tube bracket, an upper tube cylinder is fixedly provided on the top of the second down tube bracket, and the output end of the upper tube cylinder is detachably connected to an upper tube extrusion.

[0005] In a preferred embodiment, a riser positioning block is further provided on the riser bracket between the five-way cylinder and the riser cylinder, and the end of the riser positioning block is in an inwardly concave arc shape.

[0006] In a preferred embodiment, the output end of each of the five-way cylinders is detachably provided with a screw rod, the five-way extrusion piece is threadedly connected to the screw rod, and the screw rod is also provided with a fixing nut.

[0007] In a preferred embodiment, the output end of the riser cylinder is detachably provided with a screw rod, the cylinder extrusion piece is threadedly connected to the screw rod, and a fixing nut is also provided on the screw rod.

[0008] In a preferred embodiment, the first down tube bracket is L-shaped, a first fixing seat is movably provided on the first down tube bracket, the first down tube supporting member is provided on the first fixing seat, and a V-shaped groove is provided on the first down tube supporting member.

[0009] In a preferred embodiment, the second lower tube bracket is L-shaped, a second fixing seat is movably provided in the middle of the second lower tube bracket, the second lower tube supporting member is provided on the second fixing seat, a V-shaped groove is provided on the second lower tube supporting member, the output end of the upper tube cylinder is detachably provided with a screw rod, the upper tube extrusion member is detachably connected to the screw rod, and a fixing nut is also provided on the screw rod.

[0010] In a preferred embodiment, the output end of the head pipe cylinder is connected to a screw rod, the head pipe extrusion piece is detachably connected to the screw rod, a fixing nut is also provided on the screw rod, and the head pipe supporting piece comprises: a head pipe upper supporting seat and a head pipe upper supporting shaft pin, the head pipe upper supporting seat is detachably connected to the adjustment hole, and the head pipe upper supporting shaft pin is detachably connected to the head pipe upper supporting seat.

[0011] The beneficial effects of the utility model are: 1. By adopting the cylinder to fix the baby carriage frame, it has high working accuracy and environmental adaptability, can stably output instantaneous pressure and instantaneous flow control, and has relatively simple operation requirements for staff;

[0012] 2. The cylinder has strong reliability, long service life and corrosion resistance, which can ensure the long-term stable operation of mechanical equipment. At the same time, the cylinder seals, valve cores and other components can also guarantee the service life to a certain extent;

[0013] 3. The controllability and stability of the cylinder can fix the bicycle frame more completely to a certain extent, and no deformation will occur during the welding process, which improves the success rate of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a working state diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the second lower tube bracket of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the five-way cylinder of the utility model.

[0018] In the figure:

[0019] 10. Mounting platform; 101. Threaded hole; 11. Head tube bracket; 111. Adjustment hole; 12. Head tube support; 121. Head tube upper support seat; 122. Head tube upper support axle pin; 13. Head tube cylinder; 131. Head tube extrusion; 132. Screw; 133. Fixing nut; 14. Seat tube bracket; 141. Seat tube positioning block; 15. Five-way cylinder; 151. Five-way extrusion; 16. Seat tube cylinder; 161. Seat tube extrusion; 17. First down tube bracket; 171. First fixed seat; 172. First down tube support; 173. V-groove; 18. Second down tube bracket; 181. Second fixed seat; 182. Second down tube support; 19. Upper tube cylinder; 191. Upper tube extrusion. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0021] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.

[0022] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0023] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. Therefore, the utility model is not limited to the specific embodiments disclosed below.

[0025] like Figure 1-Figure 4 As shown, the utility model provides a three-dimensional flexible pneumatic tooling fixture for welding the front triangle of a baby carriage frame, characterized in that it comprises: a mounting platform 10, a plurality of threaded holes 101 are provided on the mounting platform 10 along the length direction, a seat tube bracket 14, a first down tube bracket 17, a second down tube bracket 18, and a head tube bracket 11 are provided on the mounting platform 10 from left to right in sequence; the head tube bracket 11 is located at the end of the mounting platform 10 and is integrally connected to the mounting platform 10, a plurality of adjustment holes 111 are opened on one side of the head tube bracket 11, a head tube supporting member 12 is movably connected to the middle part of the head tube bracket 11 through the adjustment holes 111, a head tube cylinder 13 is movably connected to the top of the head tube bracket 11 through the adjustment holes 111, the output end of the head tube cylinder 13 is detachably connected to a head tube extrusion member 131, and the seat tube bracket 14 is in a semi-enclosed rectangular shape, the bottom of the riser bracket 14 is detachably connected to the threaded hole 101 of the mounting platform 10, the lower end of the riser bracket 14 is provided with a flat and opposite five-way cylinder 15, the output end of the five-way cylinder 15 is detachably connected to a five-way extrusion piece 151, the top of the riser bracket 14 is fixedly provided with a vertical riser cylinder 16, the output end of the riser cylinder 16 is detachably connected to a riser extrusion piece 161; the bottom of the first down tube bracket 17 is detachably connected to the threaded hole 101, the first down tube bracket 17 is movably provided with a first down tube supporting piece 172, the middle part of the second down tube bracket 18 is movably provided with a second down tube supporting piece 182, the top of the second down tube bracket 18 is fixedly provided with an upper tube cylinder 19, the output end of the upper tube cylinder 19 is detachably connected to an upper tube extrusion piece 191;

[0026] Specifically, the head pipe bracket 11 is integrally connected with the mounting platform 10, and the head pipe bracket 11 is located at one end of the mounting platform 10, forming an "L" shape with the mounting platform 10, and a plurality of adjustment holes 111 arranged along the height direction of the head pipe bracket 11 are provided on one side or two opposite sides of the head pipe bracket 11, and the head pipe support 12 and the head pipe cylinder 13 are movably arranged on the head pipe bracket 11 through the adjustment holes 111, and the heights located on the head pipe bracket 11 can be adjusted respectively, wherein the output end of the head pipe cylinder 13 is detachably connected with a head pipe extrusion piece 131, and the head pipe of the frame is fixedly suspended through the head pipe support 12 and the head pipe extrusion piece 131. The seat tube bracket 14 is hollow on the head tube bracket 11. When installing, the head tube is aligned with the head tube supporting member 12 and placed, and then pressed by the head tube extrusion member 131 to achieve fixation. The seat tube bracket 14 is in a semi-enclosed rectangular shape. The bottom of the seat tube bracket 14 is detachably connected to the threaded hole 101 through a cross limiter. The seat tube bracket 14 can move along the mounting platform 10 to adjust the spacing distance between the head tube bracket 11 so as to adapt to frames of different lengths. A five-way cylinder 15 is horizontally arranged at the lower end of the seat tube bracket 14. The five-way cylinder 15 is provided with two and is arranged oppositely. The output end of each five-way cylinder 15 is detachably connected with a five-way extrusion member 151, the bottom bracket is fixed and suspended on the seat tube bracket 14 through two bottom bracket extrusions 151, a seat tube cylinder 16 is also provided on the top of the seat tube bracket 14, and the output end of the seat tube cylinder 16 is detachably connected to the seat tube extrusion 161, when one end of the seat tube is against the bottom bracket, the seat tube is pressed and fixed by the seat tube extrusion 161, and a first down tube bracket 17 is also provided between the seat tube bracket 14 and the head tube bracket 11, and a first down tube support 172 is movably provided in the middle of the first down tube bracket 17, and the down tube is suspended on the first down tube bracket 17 through the support of the first down tube support 172, and the first down tube bracket 17 and the head tube bracket 11 are connected. A second down tube bracket 18 is also provided between the head tube brackets 11. The second down tube bracket 18 can be moved on the mounting platform 10 through the threaded hole 101 to adjust the spacing distance between the second down tube bracket 11. A second down tube supporting member 182 is provided in the middle of the second down tube bracket 18. The down tube is balanced by the support of the first down tube supporting member 172 and the second down tube supporting member 182. At the same time, an upper tube cylinder 19 is provided on the top of the second down tube bracket 18. The output end of the upper tube cylinder 19 is detachably connected to an upper tube extrusion member 191, which is used to press the upper tube above the down tube to prevent it from moving during welding.

[0027] Furthermore, a riser positioning block 141 is provided on the riser support 14 between the five-way cylinder 15 and the riser cylinder 16, and the end of the riser positioning block 141 is in an inwardly concave arc shape;

[0028] Specifically, in order to more conveniently determine the placement position of the riser, a riser positioning block 141 is fixedly provided on the riser bracket 14 between the five-way extrusion 151 and the riser extrusion 161, wherein the end of the riser positioning block 141 is in an inwardly concave arc shape, adapted to the outer side surface of the riser. When placing the riser, the riser needs to be close to the riser positioning block 141, which means that it is placed in place, and the operation is simple and convenient.

[0029] Furthermore, each of the five-way cylinders 15 has a detachable screw rod 132 at its output end, the five-way extrusion piece 151 is threadedly connected to the screw rod 132, and a fixing nut 133 is also provided on the screw rod 132;

[0030] Specifically, the output end of each five-way cylinder 15 is threadedly connected with a screw rod 132, and the five-way extrusion piece 151 is threadedly connected to the screw rod 132. When the five-way extrusion piece 151 is not compatible with the five-way, the five-way extrusion piece 151 can be directly removed and replaced with a matching five-way extrusion piece 151. The disassembly and installation are simple and convenient, and there is no need to replace the entire set of clamps. A fixing nut 133 is also provided on the screw rod 132, and the fixing nut 133 is used to adjust the protruding length of the screw rod 132 relative to the output end of the five-way cylinder 15 to increase the operating stroke of the five-way cylinder 15.

[0031] Furthermore, the output end of the riser cylinder 16 is detachably provided with a screw 132, the cylinder extrusion piece is threadedly connected to the screw 132, and a fixing nut 133 is also provided on the screw 132;

[0032] Specifically, the output end of the riser cylinder 16 is threadedly connected with a screw rod 132, and the riser extrusion piece 161 is threadedly connected to the screw rod 132. When the riser extrusion piece 161 is not compatible with the riser, the riser extrusion piece 161 can be directly removed and replaced with a compatible riser extrusion piece 161. The disassembly and installation are simple and convenient, and there is no need to replace the entire set of clamps. A fixing nut 133 is also provided on the screw rod 132. The fixing nut 133 is used to adjust the protruding length of the screw rod 132 relative to the output end of the riser cylinder 16 to increase the operating stroke of the riser cylinder 16.

[0033] Furthermore, in this embodiment, the first lower tube bracket 17 is L-shaped, a first fixing seat 171 is movably provided on the first lower tube bracket 17, the first lower tube supporting member 172 is provided on the first fixing seat 171, and a V-shaped groove 173 is provided on the first lower tube supporting member 172;

[0034] Specifically, the bottom of the first down tube bracket 17 is movably arranged on the mounting platform 10 through a cross limiter, wherein a first fixed seat 171 is movably connected to the middle of the first down tube bracket 17, and the first fixed seat 171 can slide up and down along the height direction of the first down tube bracket 17, and the height can be adjusted to adapt to different needs. The first down tube supporting member 172 is located on the first fixed seat 171, and in order to limit the down tube, a V-shaped groove 173 is opened on the first down tube supporting member 172. When the down tube is placed in the V-shaped groove 173, it cannot move left and right due to the restriction of the V-shaped groove 173.

[0035] It should be noted that, in addition to being able to move up and down, the first fixing seat 171 can also be rotated to adapt to lower tubes with different inclinations.

[0036] Further, in this embodiment, the second lower tube bracket 18 is L-shaped, a second fixing seat 181 is movably provided in the middle of the second lower tube bracket 18, the second lower tube support member 182 is provided on the second fixing seat 181, a V-shaped groove 173 is provided on the second lower tube support member 182, a screw rod 132 is detachably provided at the output end of the upper tube cylinder 19, the upper tube extrusion member 191 is detachably connected to the screw rod 132, and a fixing nut 133 is also provided on the screw rod 132;

[0037] Specifically, a second fixing seat 181 is also movably provided in the middle of the second lower tube bracket 18, and the second fixing seat 181 can be moved along the height direction of the second lower tube bracket 18 to adjust the height. A second lower tube support 182 is also provided on the second fixing seat 181, and a V-shaped groove 173 is also provided on the second lower tube support 182 for limiting the position of the lower tube, and a screw 132 is threadedly connected to the output end of the upper tube cylinder 19, and the upper tube extrusion member 191 and the screw 132 are connected to each other. 2 threaded connection, when the upper tube extrusion piece 191 is not compatible with the upper tube, the upper tube extrusion piece 191 can be directly removed and replaced with a compatible upper tube extrusion piece 191, which is simple and convenient to disassemble and install, and there is no need to replace the entire set of clamps. A fixing nut 133 is also provided on the screw rod 132, and the fixing nut 133 is used to adjust the protruding length of the screw rod 132 relative to the output end of the upper tube cylinder 19 to increase the operating stroke of the upper tube cylinder 19, wherein the upper tube extrusion piece 191 is in an arc shape.

[0038] Further, in this embodiment, the output end of the head pipe cylinder 13 is connected to a screw rod 132, the head pipe extrusion member 131 is detachably connected to the screw rod 132, the screw rod 132 is further provided with a fixing nut 133, and the head pipe supporting member 12 comprises: a head pipe upper supporting seat 121 and a head pipe upper supporting shaft pin 122, the head pipe upper supporting seat 121 is detachably connected to the adjustment hole 111, and the head pipe upper supporting shaft pin 122 is detachably connected to the head pipe upper supporting seat 121;

[0039] Specifically, the output end of the head pipe cylinder 13 is threadedly connected with a screw rod 132, and the head pipe extrusion piece 131 is threadedly connected to the screw rod 132. When the head pipe extrusion piece 131 is not compatible with the head pipe, the head pipe extrusion piece 131 can be directly removed and replaced with a compatible head pipe extrusion piece 131. The disassembly and installation are simple and convenient, and there is no need to replace the entire set of clamps. A fixing nut 133 is also provided on the screw rod 132. The fixing nut 133 is used to adjust the screw rod 132 relative to the head pipe cylinder 1 3, so as to increase the working stroke of the head pipe cylinder 13; the head pipe upper supporting seat 121 is connected to the adjusting hole 111 by fasteners such as screws, and the head pipe upper supporting seat 121 can move along the height direction of the head pipe bracket 11; the head pipe upper supporting shaft pin 122 is detachably connected to the head pipe upper supporting seat 121, preferably a threaded connection; when the head pipe upper supporting shaft pin 122 is not compatible with the caliber of the head pipe, the head pipe upper supporting shaft pin 122 can be directly removed and replaced with a compatible one.

[0040] To sum up, the present application fixes the baby carriage frame by using a cylinder, which has high working accuracy and environmental adaptability, can stably output instantaneous pressure and instantaneous flow control, and has relatively simple operating requirements for staff; the cylinder has strong reliability, long service life and corrosion resistance, which can ensure the long-term and stable operation of mechanical equipment. At the same time, the seals, valve cores and other components of the cylinder can also guarantee the service life to a certain extent; the controllability and stability of the cylinder can fix the bicycle frame more completely to a certain extent, and no deformation will occur during the welding process, thereby improving the success rate of welding.

[0041] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A three-dimensional flexible pneumatic fixture for welding the front triangle of a baby carriage frame, characterized in that: include: A mounting platform is provided with a plurality of threaded holes along the length direction of the mounting platform, and a seat tube bracket, a first down tube bracket, a second down tube bracket, and a head tube bracket are sequentially provided on the mounting platform from left to right; the head tube bracket is located at the end of the mounting platform and is integrally connected to the mounting platform, a plurality of adjustment holes are opened on one side of the head tube bracket, a head tube supporting member is movably connected to the middle part of the head tube bracket through the adjustment holes, a head tube cylinder is movably connected to the top of the head tube bracket through the adjustment holes, a head tube extrusion member is detachably connected to the output end of the head tube cylinder, the seat tube bracket is in a semi-enclosed rectangular shape, and the bottom of the seat tube bracket is connected to the The threaded hole of the mounting platform is detachably connected, the lower end of the riser bracket is provided with a horizontal and opposite five-way cylinder, the output end of the five-way cylinder is detachably connected with a five-way extrusion piece, the top of the riser bracket is fixedly provided with a vertical riser cylinder, the output end of the riser cylinder is detachably connected with a riser extrusion piece; the bottom of the first down tube bracket is detachably connected to the threaded hole, the first down tube bracket is movably provided with a first down tube supporting piece, the middle part of the second down tube bracket is movably provided with a second down tube supporting piece, the top of the second down tube bracket is fixedly provided with an upper tube cylinder, and the output end of the upper tube cylinder is detachably connected with an upper tube extrusion piece.

2. The three-dimensional flexible pneumatic fixture for welding the front triangle of a baby carriage frame according to claim 1, characterized in that: A riser positioning block is also provided on the riser bracket between the five-way cylinder and the riser cylinder, and the end of the riser positioning block is in an inwardly concave arc shape.

3. The three-dimensional flexible pneumatic fixture for welding the front triangle of a baby carriage frame according to claim 1, characterized in that: The output end of each of the five-way cylinders is detachably provided with a screw rod, the five-way extrusion piece is threadedly connected to the screw rod, and a fixing nut is also provided on the screw rod.

4. The three-dimensional flexible pneumatic fixture for welding the front triangle of a baby carriage frame according to claim 1, characterized in that: The output end of the riser cylinder is detachably provided with a screw rod, the cylinder extrusion piece is threadedly connected to the screw rod, and a fixing nut is also provided on the screw rod.

5. The three-dimensional flexible pneumatic fixture for welding the front triangle of a baby carriage frame according to claim 1, characterized in that: The first lower tube bracket is L-shaped, a first fixing seat is movably provided on the first lower tube bracket, the first lower tube supporting member is provided on the first fixing seat, and a V-shaped groove is provided on the first lower tube supporting member.

6. The three-dimensional flexible pneumatic fixture for welding the front triangle of a baby carriage frame according to claim 1, characterized in that: The second lower tube bracket is L-shaped, and a second fixing seat is movably provided in the middle of the second lower tube bracket. The second lower tube supporting member is arranged on the second fixing seat, and a V-shaped groove is provided on the second lower tube supporting member. The output end of the upper tube cylinder is detachably provided with a screw rod, and the upper tube extrusion member is detachably connected to the screw rod, and a fixing nut is also provided on the screw rod.

7. The three-dimensional flexible pneumatic fixture for welding the front triangle of a baby carriage frame according to claim 1, characterized in that: The output end of the head pipe cylinder is connected to a screw rod, the head pipe extrusion piece is detachably connected to the screw rod, a fixing nut is also provided on the screw rod, and the head pipe supporting piece comprises: a head pipe upper supporting seat and a head pipe upper supporting shaft pin, the head pipe upper supporting seat is detachably connected to the adjustment hole, and the head pipe upper supporting shaft pin is detachably connected to the head pipe upper supporting seat.

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