阅读说明：本技术 一种自行车车架焊接夹具 (Bicycle frame welding fixture ) 是由 苏学敏 高谱祥 于 2021-07-21 设计创作，主要内容包括：本申请涉及自行车车架加工技术领域,特别涉及一种自行车车架焊接夹具,包括机架、第一夹持装置、第二夹持装置和第三夹持装置；第一夹持装置包括安装基座、第一调节组件、第一连接件和第一夹件；第一调节组件包括第一握把、第一铰接件、第一推动杆；安装基座固定于机架,第一握把的一端与安装基座铰接；第一铰接件的第一端与第一握把铰接,第一铰接件的第二端与第一推动杆的第一端铰接；第一推动杆的第二端与第一连接件连接,第一连接件与第一夹件连接；第一夹件设有用于夹持自行车车架的头管的夹持部；第二夹持装置用于夹持固定自行车车架的上管、下管和立管；第三夹持装置用于夹持四通接管。本申请解决了现有技术中存在装拆不方便的技术问题。(The application relates to the technical field of bicycle frame processing, in particular to a bicycle frame welding fixture, which comprises a rack, a first clamping device, a second clamping device and a third clamping device; the first clamping device comprises an installation base, a first adjusting assembly, a first connecting piece and a first clamping piece; the first adjusting component comprises a first handle, a first hinge part and a first push rod; the mounting base is fixed on the rack, and one end of the first handle is hinged with the mounting base; the first end of the first hinge part is hinged with the first handle, and the second end of the first hinge part is hinged with the first end of the first push rod; the second end of the first push rod is connected with a first connecting piece, and the first connecting piece is connected with a first clamping piece; the first clamping piece is provided with a clamping part for clamping a head pipe of a bicycle frame; the second clamping device is used for clamping and fixing an upper pipe, a lower pipe and a vertical pipe of the bicycle frame; and the third clamping device is used for clamping the four-way connecting pipe. The application solves the technical problem of inconvenience in assembly and disassembly in the prior art.)

1. A bicycle frame welding fixture is characterized by comprising a rack, a first clamping device, a second clamping device and a third clamping device;

the first clamping device comprises an installation base, a first adjusting assembly, a first connecting piece and a first clamping piece;

the first adjusting component comprises a first handle, a first hinge part and a first push rod;

the mounting base is fixed on the rack, and one end of the first handle is hinged with the mounting base;

the first end of the first hinge is hinged with the middle part of the first handle, and the second end of the first hinge is hinged with the first end of the first push rod;

the second end of the first pushing rod is connected with the first connecting piece, and the first connecting piece is connected with the first clamping piece;

the first clamping piece is provided with at least two clamping parts for clamping a head pipe of a bicycle frame;

the second clamping devices are used for clamping and fixing an upper pipe, a lower pipe and a vertical pipe of a bicycle frame respectively;

and the third clamping device is used for clamping a four-way connecting pipe fixedly connecting the lower pipe and the vertical pipe.

2. The bicycle frame welding fixture of claim 1, wherein the first clamping device further comprises a guide rod;

the mounting base is provided with a guide through hole corresponding to the guide rod;

the first end of the guide rod is connected with the first connecting piece, and the second end of the guide rod is slidably mounted in the guide through hole.

3. The bicycle frame welding fixture of claim 2, wherein a fixed seat is removably mounted on the mounting base;

the first handle is hinged with the fixed seat;

the first hinge is arranged on the fixed seat.

4. The bicycle frame welding fixture of claim 3, wherein a limit guide is provided on the fixing base;

the limiting guide piece is provided with a limiting hole;

the first push rod penetrates through the limiting hole to be connected with the first connecting piece.

5. The bicycle frame welding fixture of claim 3, wherein the first grip comprises a gripping portion and a driving portion;

the driving part is in a V shape with an obtuse included angle;

the first end of the driving part is hinged with the fixed seat, and the second end of the driving part is connected with the first handle;

the first end of the first hinge is hinged at the corner of the driving part.

6. The bicycle frame welding fixture of claim 1, wherein the first clamp member is provided with an arc-shaped hole, and the first connecting member is provided with a through hole corresponding to the arc-shaped hole;

the first clamping piece and the first connecting piece are connected through the arc-shaped hole and the through hole by a fastening piece.

7. The bicycle frame welding fixture of claim 1, wherein each of said second clamping devices comprises a retaining socket, a clamping head, and a second adjustment assembly;

the limiting seat is arranged on the rack, and a limiting clamping groove is formed in the limiting seat;

the second adjusting component is connected with the pressing head and used for generating acting force close to the limiting seat on the pressing head, so that a first clamping space is formed between the pressing head and the limiting seat.

8. The bicycle frame welding fixture of claim 7, wherein the second adjustment assembly includes a support member, a pivot mount, a second grip, a second hinge member, and a second connector;

the supporting piece is fixedly arranged on the rack;

the pivoting seat is arranged on the supporting piece;

the first end of the second hinge piece is hinged with the first end of the pivoting seat, and the second end of the second hinge piece is hinged with the middle part of the second handle;

the second end of the pivoting seat and the first end of the second handle are both hinged with the first end of the second connecting piece;

the compression head is mounted on the second end of the second connector.

9. The bicycle frame welding fixture of claim 1, wherein the third clamping device includes a third adjustment assembly, a second clamp member, and a third clamp member;

the second clamping piece is fixed on the rack;

the third adjusting assembly is connected with the third clamping piece and used for driving the third clamping piece to move in a direction close to or far away from the second clamping piece, so that a second clamping space is formed between the second clamping piece and the third clamping piece.

10. The bicycle frame welding fixture of any one of claims 1-9, further comprising a limit adjustment mechanism;

the limiting and adjusting mechanism comprises a positioning seat and an adjusting rod;

the positioning seat is fixed on the rack, and an adjusting hole is formed in the positioning seat;

the adjusting rod penetrates through the adjusting hole to be in contact and abutted with the four-way connecting pipe;

the adjusting rod is provided with a plurality of first positioning holes along the length direction, and the positioning seat is provided with second positioning holes corresponding to the first positioning holes.

Technical Field

The application relates to the technical field of bicycle frame processing, in particular to a bicycle frame welding fixture.

Background

As shown in FIG. 1, the bicycle frame includes a head tube, an upper tube, a lower tube and a seat tube. One end of the upper pipe is welded on the head pipe, and the other end of the upper pipe is welded on the top end of the vertical pipe; one end of the lower pipe is welded on the head pipe, and the other end of the lower pipe is welded on the four-way connecting pipe; the bottom end of the vertical pipe is welded on the four-way connecting pipe. When welding bicycle frame, need fix through anchor clamps counter head pipe, top tube, low tube and riser, wherein, change a mould and need dismouting pin 35, it needs about 4 hours consuming time. The clamp plates need to be replaced on the left and right sides of the frame during welding, and the error is large after the die is reset. In addition, after the tool fixture is updated, the automatic manipulator program needs to be rewritten and the welding seam position needs to be modified.

Disclosure of Invention

In view of this, the present application provides a bicycle frame welding jig, which effectively solves the technical problem of inconvenient assembly and disassembly in the prior art.

In order to achieve the purpose, the application provides the following technical scheme:

a welding fixture for a bicycle frame comprises a frame, a first clamping device, a second clamping device and a third clamping device;

the first clamping device comprises an installation base, a first adjusting assembly, a first connecting piece and a first clamping piece;

the first adjusting component comprises a first handle, a first hinge part and a first push rod;

the mounting base is fixed on the rack, and one end of the first handle is hinged with the mounting base;

the first end of the first hinge is hinged with the middle part of the first handle, and the second end of the first hinge is hinged with the first end of the first push rod;

the second end of the first pushing rod is connected with the first connecting piece, and the first connecting piece is connected with the first clamping piece;

the first clamping piece is provided with at least two clamping parts for clamping a head pipe of a bicycle frame;

the second clamping devices are used for clamping and fixing an upper pipe, a lower pipe and a vertical pipe of a bicycle frame respectively;

and the third clamping device is used for clamping a four-way connecting pipe fixedly connecting the lower pipe and the vertical pipe.

Preferably, in the bicycle frame welding jig described above, the first clamping device further includes a guide rod;

the mounting base is provided with a guide through hole corresponding to the guide rod;

the first end of the guide rod is connected with the first connecting piece, and the second end of the guide rod is slidably mounted in the guide through hole.

Preferably, in the above bicycle frame welding jig, the mounting base is detachably mounted with a fixing base;

the first handle is hinged with the fixed seat;

the first hinge is arranged on the fixed seat.

Preferably, in the above bicycle frame welding jig, the fixing seat is provided with a limit guide;

the limiting guide piece is provided with a limiting hole;

the first push rod penetrates through the limiting hole to be connected with the first connecting piece.

Preferably, in the above bicycle frame welding jig, the first grip includes a grip portion and a driving portion;

the driving part is in a V shape with an obtuse included angle;

the first end of the driving part is hinged with the fixed seat, and the second end of the driving part is connected with the first handle;

the first end of the first hinge is hinged at the corner of the driving part.

Preferably, in the above bicycle frame welding jig, the first clamping piece is provided with an arc-shaped hole, and the first connecting piece is provided with a through hole corresponding to the arc-shaped hole;

the first clamping piece and the first connecting piece are connected through the arc-shaped hole and the through hole by a fastening piece.

Preferably, in the above bicycle frame welding jig, each of the second clamping devices includes a limiting seat, a pressing head and a second adjusting assembly;

the limiting seat is arranged on the rack, and a limiting clamping groove is formed in the limiting seat;

the second adjusting component is connected with the pressing head and used for generating acting force close to the limiting seat on the pressing head, so that a first clamping space is formed between the pressing head and the limiting seat.

Preferably, in the above bicycle frame welding jig, the second adjusting assembly includes a supporting member, a pivoting seat, a second grip, a second hinge member and a second connecting member;

the supporting piece is fixedly arranged on the rack;

the pivoting seat is arranged on the supporting piece;

the first end of the second hinge piece is hinged with the first end of the pivoting seat, and the second end of the second hinge piece is hinged with the middle part of the second handle;

the second end of the pivoting seat and the first end of the second handle are both hinged with the first end of the second connecting piece;

the compression head is mounted on the second end of the second connector.

Preferably, in the above bicycle frame welding jig, the third clamping device includes a third adjusting member, a second clamping member and a third clamping member;

the second clamping piece is fixed on the rack;

the third adjusting assembly is connected with the third clamping piece and used for driving the third clamping piece to move in a direction close to or far away from the second clamping piece, so that a second clamping space is formed between the second clamping piece and the third clamping piece.

Preferably, in the above bicycle frame welding jig, a limit adjusting mechanism is further included;

the limiting and adjusting mechanism comprises a positioning seat and an adjusting rod;

the positioning seat is fixed on the rack, and an adjusting hole is formed in the positioning seat;

the adjusting rod penetrates through the adjusting hole to be in contact and abutted with the four-way connecting pipe;

the adjusting rod is provided with a plurality of first positioning holes along the length direction, and the positioning seat is provided with second positioning holes corresponding to the first positioning holes.

Compared with the prior art, the beneficial effects of this application are:

the application provides a bicycle frame welding jig, when fixed, pulls first handle and drives the swing of first articulated elements, produces the effort that is close to first connecting piece to first catch bar, orders about first catch bar and promotes first connecting piece and first folder and move to the direction that is close to bicycle frame, and second clamping device and third clamping device are reunited, and the completion is fixed to the centre gripping of whole bicycle frame to carry out the welding process operation to bicycle frame. When the bicycle frame is disassembled, the first handle is pulled in the opposite direction to drive the first hinge piece to swing in the opposite direction, a pulling force far away from the first connecting piece is generated on the first push rod, the first push rod is driven to pull the first connecting piece and the first clamping piece to move in the direction far away from the bicycle frame, and then the second clamping device and the third clamping device are loosened, so that the purpose of quickly loosening the bicycle frame is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a top plan view of a bicycle frame welding fixture provided in an embodiment of the present application;

FIG. 2 is a perspective view of a welding fixture for a bicycle frame according to an embodiment of the present application;

FIG. 3 is a schematic structural view of a first clamping device of a bicycle frame welding fixture according to an embodiment of the present application;

FIG. 4 is a schematic structural view of a second clamping device of a bicycle frame welding fixture according to an embodiment of the present application;

FIG. 5 is a schematic structural view of a third clamping device of a bicycle frame welding fixture according to an embodiment of the present application.

In the figure:

1. a first holding device; 11. mounting a base; 12. a first adjustment assembly; 121. a first grip; 1211. a grip portion; 1212. a drive section; 122. a first hinge member; 123. a first push rod; 13. a first connecting member; 14. a first clamp member; 141. a clamping portion; 142. a baffle plate; 143. an arc-shaped hole; 15. a guide bar; 16. a fixed seat; 17. a limiting guide member; 2. a second holding device; 21. a limiting seat; 22. a compression head; 23. a second adjustment assembly; 231. a support member; 232. a pivoting seat; 233. a second grip; 234. a second hinge member; 235. a second connecting member; 3. a third clamping device; 31. a third adjustment assembly; 32. a second clamp; 33. a third clip member; 4. a limit adjusting mechanism; 41. positioning seats; 42. adjusting a rod; 5. a frame; 6. a bicycle frame; 61. a head pipe; 62. feeding a pipe; 63. a lower pipe; 64. a riser; 65. a four-way connecting pipe.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

As shown in FIG. 1, the bicycle frame 6 includes a head tube 61, an upper tube 62, a lower tube 63 and a seat tube 64. One end of the upper pipe 62 is welded on the head pipe 61, and the other end of the upper pipe 62 is welded on the top end of the stand pipe 64; one end of the lower pipe 63 is welded on the head pipe 61, and the other end of the lower pipe 63 is welded on the four-way connecting pipe; the bottom end of the stand pipe 64 is welded to the four-way joint pipe 65. When welding bicycle frame 6, need fix through anchor clamps counter head pipe 61, top tube 62, low tube 63 and riser 64, wherein, change a mould and need dismouting pin 35, it takes about 4 hours to spend time. The clamp plates need to be replaced on the left and right sides of the frame during welding, and the error is large after the die is reset. In addition, after the tool fixture is updated, the automatic manipulator program needs to be rewritten and the welding seam position needs to be modified.

Referring to fig. 1 to 5, an embodiment of the present application provides a welding fixture for a bicycle frame 6, which includes a frame 5, a first clamping device 1, a second clamping device 2, and a third clamping device 3; the first clamping device 1 comprises a mounting base 11, a first adjusting assembly 12, a first connecting piece 13 and a first clamping piece 14; the first adjusting assembly 12 comprises a first grip 121, a first hinge 122, a first pushing rod 123; the mounting base 11 is fixed on the frame 5, and one end of the first grip 121 is hinged with the mounting base 11; a first end of the first hinge 122 is hinged to the middle of the first grip 121, and a second end of the first hinge 122 is hinged to a first end of the first push rod 123; the second end of the first pushing rod 123 is connected with the first connecting piece 13, and the first connecting piece 13 is connected with the first clamping piece 14; the first clamping piece 14 is provided with at least two clamping parts 141 for clamping the head pipe 61 of the bicycle frame 6; the plurality of second clamping devices 2 are respectively used for clamping and fixing an upper pipe 62, a lower pipe 63 and a stand pipe 64 of the bicycle frame 6; the third clamping device 3 is used for clamping a four-way connecting pipe 65 fixedly connecting the lower pipe 63 and the stand pipe 64.

More specifically, the mounting base 11 is detachably mounted to the frame 5 by fasteners; the clamping parts 141 are detachably mounted on the first clamping piece 14, the two clamping parts 141 are respectively arranged on two sides of the first clamping piece 14, the clamping parts 141 are provided with clamping grooves matched with the head pipe 61, one clamping part 141 is provided with a baffle 142, and the baffle 142 is in contact and abutting contact with the end surface of the head pipe 61 and can serve as a positioning reference for mounting the head pipe 61 on the first clamping piece 14; the frame 5 is connected and is equipped with the L template, and frame 5 passes through the L template and is connected with driving motor's actuating shaft, rotates through driving motor drive frame 5 and first clamping device 1, second clamping device 2 and the third clamping device 3 that set up in frame 5 to welding equipment carries out welding process to bicycle frame 6.

In this embodiment, when the bicycle frame is fixed, the first handle 121 is pulled to drive the first hinge 122 to swing, so as to generate an acting force on the first pushing rod 123 close to the first connecting member 13, drive the first pushing rod 123 to push the first connecting member 13 and the first clamping member 14 to move in a direction close to the bicycle frame 6, and then combine the second clamping device 2 and the third clamping device 3 to complete clamping and fixing of the whole bicycle frame 6, so as to perform welding operation on the bicycle frame 6. When the bicycle frame is disassembled, the first handle 121 is pulled in the opposite direction to drive the first hinge part 122 to swing in the opposite direction, so that a pulling force far away from the first connecting part 13 is generated on the first pushing rod 123, the first pushing rod 123 is driven to pull the first connecting part 13 and the first clamping part 14 to move in the direction far away from the bicycle frame 6, and then the second clamping device 2 and the third clamping device 3 are loosened, so that the purpose of quickly loosening the bicycle frame 6 is achieved.

Further, in the present embodiment, referring to fig. 3, the first clamping device 1 further includes a guide rod 15; the mounting base 11 is provided with a guide through hole corresponding to the guide rod 15; a first end of the guide rod 15 is connected to the first connector 13 and a second end of the guide rod 15 is slidably mounted in the guide through hole. The movement direction of the connecting piece and the first clamping piece 14 can be effectively limited through the arrangement of the guide rod 15, the guide of the connecting piece and the movement of the first clamping piece 14 along the linear direction is facilitated, the position of the first clamping piece 14 can be adjusted better by a worker conveniently, so that the first clamping piece 14 can clamp the head pipe 61 better, the two clamping parts 141 can be clamped to the head pipe 61 simultaneously, and the clamping stability of the first clamping piece 14 to the head pipe 61 is guaranteed.

More specifically, the number of the guide rods 15 is two, and the two guide rods 15 are respectively distributed on both sides of the first connecting member 13; the first connecting piece 13 comprises a vertically-arranged stress plate and a horizontally-arranged first connecting base plate, a second connecting plate corresponding to the first connecting plate is arranged on the side wall of the first clamping piece 14, and the first connecting plate and the second connecting plate are connected through a fastener.

Further, in the present embodiment, please refer to fig. 3, a fixing base 16 is detachably mounted on the mounting base 11; the first handle 121 is hinged with the fixed seat 16; the first hinge 122 is disposed on the fixing base 16. The requirement that the first handle 121 is hinged to the mounting base 11 can be met through the fixing seat 16, the requirement that the first adjusting component 12 is detached from the mounting base 11 can also be met, and the first adjusting component 12 is convenient to maintain and replace.

More specifically, the mounting base 11 is detachably fixed on the mounting base 11 by a fastener, a groove corresponding to the fixing seat 16 is formed in the middle of the mounting base 11, and the fixing seat 16 is detachably mounted in the groove by the fastener.

Further, in the present embodiment, referring to fig. 3, a limiting guide 17 is disposed on the fixing base 16; the limiting guide member 17 is provided with a limiting hole; the first pushing rod 123 passes through the limiting hole and is connected with the first connecting piece 13. The limiting guide member 17 can limit the movement direction of the first pushing rod 123, so that the movement direction of the first pushing rod 123 is unique, and the first pushing rod 123 is driven to move along the linear direction by the swinging of the first grip 121 and the first hinge 122, thereby achieving the effect of driving the first connecting member 13 and the first clamping member 14 to move forward or backward.

More specifically, the first push lever 123 is detachably connected to the first link 13; the stress plate of the first connecting piece 13 is provided with a notch matched with the first pushing rod 123, the second end of the first pushing rod 123 is provided with an external thread, the stress plate is provided with a first nut and a second nut, the first nut is positioned on one side of the stress plate close to the first clamping piece 14, the second nut is positioned on one side of the stress plate close to the first handle 121, and the stress plate is adjusted continuously through the first nut and the second nut so as to adjust the position of the stress plate relative to the mounting base 11, namely, the first clamping piece 14 is controlled to advance or retreat, so that the first clamping piece 14 has the best clamping position, and the clamping effect of the first clamping piece 14 on the head pipe 61 is guaranteed.

Further, in the present embodiment, referring to fig. 3, the first grip 121 includes a holding portion 1211 and a driving portion 1212; the driving portion 1212 is V-shaped with an obtuse angle; the first end of the driving portion 1212 is hinged to the fixing base 16, and the second end of the driving portion 1212 is connected to the first handle 121; the bent corner of the driving portion 1212 is hinged to the first end of the first hinge 122. The first end of the driving portion 1212 serves as a fulcrum through the arrangement of the driving portion 1212, and when the first grip 121 is pulled, since the distance from the grip 1211 to the fulcrum is greater than the distance from the first hinge 122 to the fulcrum, according to the lever theorem, the longer the arm of force, the smaller the required acting force is, the arrangement is favorable for reducing the force required for pulling the first grip 121, so that the worker can easily pull the first grip 121, the worker can conveniently adjust the position of the first clamping member 14 by using the first grip 121, and the labor intensity is effectively reduced.

More specifically, the fixing seat 16 is provided with a connecting lug, the driving portion 1212 is divided into two halves, the two halves of the driving portion 1212 are respectively located at two sides of the connecting lug, and the driving portion 1212 is hinged to the connecting lug through a rotating shaft; the first hinge 122 is also divided into two halves, the two halves of the first hinge 122 are respectively located at two sides of the driving portion 1212, the first hinge 122 is hinged with the driving portion 1212 through a rotating shaft, and the first hinge 122 is also hinged with the first pushing rod 123 through a rotating shaft; and the driving portion 1212 and the first hinge 122 are engaged with each other, so that the first handle 121 is not easily loosened, and the rotation position of the first handle 121 may be locked by a fastener, a strap, or other means.

Further, in the present embodiment, referring to fig. 3, the first clamping member 14 is provided with an arc-shaped hole 143, and the first connecting member 13 is provided with a through hole corresponding to the arc-shaped hole 143; the first clip member 14 and the first connector 13 are connected by a fastener through the arc-shaped hole 143 and the through-hole. The relative deflection angle between the first clamping member 14 and the first connecting member 13 can be properly adjusted by the arc-shaped holes 143, so that the clamping portion 141 of the first clamping member 14 can be clamped on head tubes 61 of different specifications in a fitting manner.

More specifically, the arc-shaped hole 143 is disposed on the second connecting plate horizontally disposed, the first connecting plate of the first connecting member 13 is provided with a fixing hole corresponding to the arc-shaped hole 143, a position in the arc-shaped hole 143 is selected by a fastener, and then the first connecting plate and the second connecting plate are fixed by passing through the fixing hole and the arc-shaped hole 143, so that the first connecting member 13 and the first clamping member 14 are connected together.

Further, in the present embodiment, referring to fig. 4, each second clamping device 2 includes a limiting seat 21, a pressing head 22 and a second adjusting assembly 23; the limiting seat 21 is arranged on the frame 5, and a limiting clamping groove is arranged on the limiting seat 21; the second adjusting component 23 is connected to the pressing head 22, and is configured to generate an acting force on the pressing head 22, which is close to the limiting seat 21, so that a first clamping space is formed between the pressing head 22 and the limiting seat 21. Spacing draw-in groove can play the effect of bearing to upper tube 62, low tube 63 or riser 64, and the cooperation is compressed tightly the head 22 again, can form clamping action to upper tube 62, low tube 63 or riser 64 to obtain the fixed position effect to upper tube 62, low tube 63 or riser 64, so that weld process operation to whole bicycle frame 6. And can suitably adjust the distance between pressure head 22 and spacing seat 21 through second adjusting part 23 to be applicable to the tubular product of different specifications and carry out the centre gripping, be favorable to increasing the application range of device.

More specifically, the size and shape of the limiting clamping groove are set according to the shape and specification of the upper pipe 62, the lower pipe 63 and the stand pipe 64; the clamping of a single upper pipe 62, a single lower pipe 63 or a single vertical pipe 64 is at least provided with two limiting clamping grooves, and the at least two limiting clamping grooves can effectively avoid the swinging of the upper pipe 62, the lower pipe 63 or the vertical pipe 64.

Further, in the present embodiment, referring to fig. 4, the second adjusting assembly 23 includes a supporting member 231, a pivot seat 232, a second handle 233, a second hinge 234 and a second connecting member 235; the supporting member 231 is fixedly disposed on the frame 5; the pivot base 232 is mounted on the supporting member 231; a first end of the second hinge member 234 is hinged to the first end of the pivot base 232, and a second end of the second hinge member 234 is hinged to the middle of the second handle 233; the second end of the pivot base 232 and the first end of the second handle 233 are both hinged to the first end of the second connecting member 235; the compression head 22 is mounted on a second end of the second connector 235. The support 231 is used for correspondingly lifting the second grip 233, the pressing head 22 and the like; by pulling the second grip 233 upward, the second hinge 234 and the second connector 235 are released, so that the worker can properly adjust the up-down position of the pressing head 22; the second grip 233 is pulled downward until the second grip 233 cannot be pulled, thereby fixing the compression head 22.

More specifically, a bar-shaped through hole is formed in the second end of the second connecting piece 235, the compression head 22 is connected with a screw rod, the screw rod is arranged in the bar-shaped through hole in a penetrating mode, two nuts are arranged on the screw rod and are respectively located above and below the second connecting piece 235, the extending distance of the compression head 22 can be properly adjusted by rotating the two nuts, clamping requirements of pipes of different specifications are met, and finally the two nuts are in contact and abut against the second connecting piece 235, so that the effect of fixing the compression head 22 is achieved; additional fasteners, ties, or other means may be added to lock the rotational position of the second grip 233.

Further, in the present embodiment, referring to fig. 5, the third clamping device 3 includes a third adjusting assembly 31, a second clamping member 32 and a third clamping member 33; the second clamping piece 32 is fixed on the frame 5; the third adjusting assembly 31 is connected to the third clamping member 33 for driving the third clamping member 33 to move in a direction approaching or moving away from the second clamping member 32, so that a second clamping space is formed between the second clamping member 32 and the third clamping member 33. When the four-way connecting pipe is fixed, two end faces of the four-way connecting pipe 65 need to be respectively contacted and abutted with the second clamping piece 32 and the third clamping piece 33; the third adjusting assembly 31 can drive the second clamping piece 32 to move in a direction close to or far from the second clamping piece 32, so that the effect of properly adjusting the distance between the second clamping piece 32 and the third clamping piece 33 is achieved, and the purpose of clamping and fixing the four-way connecting pipe 65 meeting different specifications is achieved. The common clamping of the third clamping device 3 and the second clamping device 2 can fix the whole bicycle frame 6 along the height direction, so that the whole bicycle frame 6 is prevented from shifting and deviating along the height direction in the welding process.

More specifically, the third adjusting assembly 31 may be a telescopic cylinder, and a telescopic rod of the telescopic cylinder is connected to the third clamping member 33 for driving the third clamping member 33 to move in a direction approaching or departing from the second clamping member 32; the third adjustment assembly 31 may also be an electric push rod or other telescoping mechanism.

Further, in the present embodiment, please refer to fig. 5, further comprising a limiting adjustment mechanism 4; the limiting and adjusting mechanism 4 comprises a positioning seat 41 and an adjusting rod 42; the positioning seat 41 is fixed on the frame 5, and the positioning seat 41 is provided with an adjusting hole; the adjusting rod 42 passes through the adjusting hole and is contacted and abutted with the four-way connecting pipe 65; the adjusting rod 42 is provided with a plurality of first positioning holes along the length direction, and the positioning seat 41 is provided with second positioning holes corresponding to the first positioning holes. The adjusting rod 42 is rotated until the end part of the adjusting rod 42 is contacted and abutted against the four-way connecting pipe 65, the adjusting rod 42 and the positioning seat 41 are fixed by penetrating through the first positioning hole and the second positioning hole through the fasteners, and then the clamping effect of each limiting clamping groove and the clamping effect of the first clamping device 1 are matched, so that the bicycle frame 6 can be fixed along the horizontal direction, and the situation that the whole bicycle frame 6 is displaced and deviated along the horizontal direction in the welding process can be prevented.

More specifically, the positioning seat 41 may be L-shaped, a lower side of the positioning seat 41 may be detachably connected to the frame 5 by a fastener, an upper side of the positioning seat 41 is used for installing the adjusting rod 42, and the adjusting rod 42 may be installed on the positioning seat 41 by a thread.

The beneficial effects of this embodiment:

(1) the first clamping device 1, the second clamping device 2 and the third clamping device 3 are all in a compression joint fixing mode, excessive pins do not need to be disassembled, the disassembling and assembling time is greatly shortened, the rapid disassembling and replacing of the die are realized, the whole frame can be welded at one time, clamps do not need to be replaced or manual repair welding does not need to be carried out, meanwhile, the mechanical arm does not need to be reprogrammed after being reset, the original program is called out, and the device has the advantages of high installing precision, simple installing steps and good welding quality;

(2) the frame 5 can be externally connected with a rotating shaft of a driving motor, the rotating shaft and the automatic welding machine are uniformly controlled by a program, and the rotating shaft can adjust the turnover angle along with the stroke of a welding head in the welding process, so that each part of the frame is welded and formed at one time, and the welding quality is improved;

(3) the frame 5 and the clamp part can be provided with a position-avoiding slotted hole according to the welding position of the frame, so that the interference to a welding head in the overturning process is avoided.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.