CN217647392U - Welding tool for subway pipe piece steel reinforcement cage - Google Patents

Abstract

The application discloses a welding tool for a subway pipe sheet reinforcement cage, which comprises a tire fixture and a welding assembly, wherein the tire fixture is suitable for positioning the position of a reinforcement, the tire fixture is in the shape of a semicircular ring with an upward cambered surface, the tire fixture comprises a first tire fixture and a second tire fixture, the first tire fixture and the second tire fixture are distributed on two sides of the welding tool in a mirror image manner, and the first tire fixture and the second tire fixture can be connected in an openable manner; the inner walls of the first tire clamp and the second tire clamp define a placing cavity, and the placing cavity is suitable for positioning the outer contour of the steel bar; the welding subassembly is installed and is being placed the intracavity, and the welding subassembly is applicable to each node of welding reinforcing bar. The welding process can solve the problems that the welding leakage and the welding releasing often occur in the welding process of the reinforcement cage.

Description

Welding tool for subway pipe piece steel reinforcement cage

Technical Field

The application relates to the field of subway pipe pieces, in particular to a welding tool for a subway pipe piece steel reinforcement cage.

Background

The subway segments are main assembly members for shield construction, when a shield machine excavates forwards, a complete-ring subway tunnel 'concrete liner' can be assembled by using the prefabricated segments, the quality of the subway segments directly influences the quality of the subway tunnel, and the requirements on the overall quality of the subway and the waterproofness and durability of the tunnel are met; inside the subway section of jurisdiction is placed to the steel reinforcement cage, be applicable to the tensile strength that increases the subway section of jurisdiction that the concrete made.

The problems of welding missing and welding releasing of the reinforcement cage often occur in the welding process, and the problems need to be solved by the technical personnel in the field.

Disclosure of Invention

An aim at of this application provides a subway tube piece steel reinforcement cage's welding frock.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows:

the welding tool for the subway pipe piece reinforcement cage comprises a jig fixture and a welding assembly, wherein the jig fixture is suitable for positioning the position of a reinforcement, the jig fixture is in the shape of a semicircular ring with an upward arc surface, the jig fixture comprises a first jig fixture and a second jig fixture, the first jig fixture and the second jig fixture are distributed on two sides of the welding tool in a mirror image manner, and the first jig fixture and the second jig fixture are connected in an openable manner; the inner walls of the first tire clamp and the second tire clamp define a placing cavity, and the placing cavity is suitable for positioning the outer contour of the steel bar;

the welding assembly is installed place the intracavity, the welding assembly is applicable to the welding each node of reinforcing bar.

In the actual production process, a method for placing the steel reinforcement cage with the cambered surface facing outwards is usually adopted for welding the subway segment steel reinforcement cage, the steel reinforcement cage needs to be turned over by 90 degrees after welding is completed, and then the steel reinforcement cage is placed into the segment mold. Because the dead weight of steel reinforcement cage is great, at the in-process of upset, the problem of desoldering appears easily to the steel reinforcement cage that stacks appears leaking easily and welds, influences the quality of steel reinforcement cage, consequently child fixture adopts cambered surface semicircle ring up, and after the welding is accomplished, can directly hoist and mount, need not carry out the upset operation to the steel reinforcement cage again, avoids appearing the problem of desoldering at the upset in-process.

And the reinforcing bar is located places the intracavity, can accurate positioning steel bar's outline, makes things convenient for the solder joint of accurate control reinforcing bar, and first child fixture and second child fixture can connect with opening and shutting, have made things convenient for the workman to operate every welding point in proper order, prevent because the welding point is too much, and the problem of welding appears leaking.

Further preferably, the first jig comprises a first top jig and a first bottom jig, the first top jig is mounted on the top of the first jig, and the first bottom jig is mounted on the bottom of the first jig; a second top fixture and a second bottom fixture are arranged at corresponding positions of the second tire fixture, and inner walls of the first top fixture, the first bottom fixture, the second top fixture and the second bottom fixture define the placing cavity; the top parts of the first top fixture and the second top fixture are provided with vertical bar fixing holes, and vertical bars penetrate through the vertical bar fixing holes; the vertical bar fixing holes are suitable for positioning the positions of the vertical bars.

The vertical reinforcing steel bars penetrate through the vertical reinforcing steel bar fixing holes of the first tire fixture and the second tire fixture, so that the positions of the vertical reinforcing steel bars can be positioned in actual production, the next operation of the welding assembly is facilitated, and if the vertical reinforcing steel bar fixing holes are not formed, much extra time is needed for scribing, and the production efficiency is reduced; if erect the position change of putting the reinforcing bar, can change different child fixture and answer the different condition, both guaranteed the production welding efficiency to single specification model steel reinforcement cage, guaranteed its flexibility again, the convenient steel reinforcement cage to other specifications welds.

Preferably, a first sliding shaft hole is formed in the bottom of the first tire clamp, a second sliding shaft hole is formed in the corresponding position of the second tire clamp, the tire clamp is provided with a sliding shaft, the sliding shaft penetrates through the first sliding shaft hole and the second sliding shaft hole, and the first tire clamp and the second tire clamp are connected in an openable and closable manner through the sliding shaft; the number of the sliding shafts is not less than three.

Set up the sliding shaft and can reduce the frictional force that first child fixture and second child fixture need when can opening and shutting and slide to reduce the power take off that needs, and because the weight ratio of steel reinforcement cage and child fixture is heavier, three sliding shafts are no less than to need parallel arrangement, with the frictional force that further reduces the sliding lock needs, and can prevent that child fixture from blocking at the sliding shaft and dying, the problem that became invalid appears.

Further preferably, the first tire fixture is provided with a first connecting rib, and the first top fixture and the first bottom fixture are connected through the first connecting rib; the second clamping fixture is provided with a second connecting rib in a mirror image mode, and the second top clamping fixture is connected with the second bottom clamping fixture through the second connecting rib.

The first connecting rib and the second connecting rib are used for being connected with the first bottom fixture and the first bottom fixture respectively, and the second bottom fixture respectively, so that the weight of the tire fixture can be conveniently reduced, the weight of the tire fixture is maximally reduced on the premise of ensuring the strength and the effect of the tire fixture, the material consumption and the energy consumption are reduced, and the cost is controlled.

In another preferred mode, the lateral side of the tire fixture is provided with transverse bar fixing holes, transverse bars penetrate through the transverse bar fixing holes, and the transverse bar fixing holes are suitable for positioning the positions of the transverse bars.

Further preferably, the length of the transverse reinforcing steel bars is the total length of the reinforcing cage.

The length can once insert horizontal muscle fixed orifices for the horizontal reinforcing bar of steel reinforcement cage overall length in operation process, reduces the follow-up operation of inserting horizontal reinforcing bar, optimizes the welding procedure to simplified the cutting operation before the welding, the cost is reduced of maximize, and horizontal reinforcing bar is the straight line, can reduce the operation of steel bar bender, further increases steel reinforcement cage's production efficiency.

In another preferred embodiment, the inner walls of the first top fixture, the first bottom fixture, the second top fixture and the second bottom fixture are provided with a welding assembly track, the shape of the welding assembly track is consistent with that of the arc-shaped steel bar, and the welding assembly is slidably connected in the welding assembly track.

The welding assembly rails embedded in the tire clamping apparatus are arranged for the welding assembly, so that the welding efficiency can be increased by times, and the condition of welding leakage is prevented.

Preferably, the device for welding the subway segment steel reinforcement cage is provided with a driving assembly, and the driving assembly is suitable for driving the first tire clamp and the second tire clamp to be connected in an openable and closable manner; the driving assembly comprises a first sliding block, a second sliding block and a lifting block, the first sliding block is connected to the bottom of the first tire fixture, the second sliding block is connected to the bottom of the second tire fixture, the lifting block is installed in the middle of the tire fixture, and the first sliding block and the second sliding block are rotatably connected with the lifting sliding block.

Compared with the prior art, the beneficial effect of this application lies in:

(1) The tire clamp with the upward cambered surface is adopted, so that the steel reinforcement cage is prevented from being turned over after welding is finished, the problem of desoldering in the turning process is prevented, the tire clamp positions the outer contour of the steel reinforcement by using the inner cavity, the processes of scribing measurement are reduced, the manufacturing cost can be reduced, the manufacturing process is reduced, and the manufacturing precision is improved;

(2) The first clamping fixture and the second clamping fixture which can be opened and closed can sequentially position the vertical reinforcing steel bars and the arc-shaped reinforcing steel bars at different positions, so that the welding leakage phenomenon of workers and tigers is reduced due to too many welding spots in the operation process, the quality of a reinforcing cage can be improved, the strength of the reinforcing cage is increased, and the quality of the subway pipe piece is further optimized.

Drawings

FIG. 1 is a schematic representation of a rebar of one embodiment of the present apparatus;

FIG. 2 is a schematic view of one embodiment of the present apparatus, showing various structures and locations;

FIG. 3 is a schematic view of the initial positions of the first and second tire clamps of one embodiment of the apparatus;

FIG. 4 is a schematic view of a first and second tire clamps in an open position in accordance with one embodiment of the present apparatus;

FIG. 5 is a cross-sectional view of one embodiment of the present apparatus showing the location and shape of the welding assembly track.

In the figure: 1. a tire fixture; 11. a first tire fixture; 111. a first top fixture; 112. a first bottom fixture; 113. a first slide shaft hole; 114. a first connecting rib;

12. a second tire fixture; 121. a second top fixture; 122. a second bottom fixture; 123. a second slide shaft hole; 124. a second connecting rib;

13. a placement chamber; 14. a sliding shaft; 15. vertically arranging a rib fixing hole; 16. fixing holes for transverse ribs; 17. welding the assembly rail;

2. welding the assembly;

3. reinforcing steel bars; 31. vertically placing a steel bar; 32. transversely arranging reinforcing steel bars; 33. arc-shaped reinforcing steel bars;

4. a drive assembly; 41. a first slider; 42. a second slider; 43. and (6) lifting the block.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments described below or between the technical features may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the actual production process, the method for placing the welded subway segment steel reinforcement cage with the steel reinforcement cage cambered surface facing outwards is generally adopted, the steel reinforcement cage needs to be turned over by 90 degrees after welding is completed, and then the steel reinforcement cage is placed into the segment mold. Because the dead weight of steel reinforcement cage is great, at the in-process of upset, the easy problem that appears sealing off to the steel reinforcement cage that stacks appears leaking easily and welds, influences the quality of steel reinforcement cage.

Accordingly, the applicant has invented a welding fixture for a steel reinforcement cage of a subway tube, wherein one embodiment of the welding fixture is shown in fig. 1 to 5, the welding fixture comprises a jig fixture 1 and a welding assembly 2, the jig fixture 1 is suitable for positioning a position of a steel reinforcement 3, the jig fixture 1 is in the shape of a semicircular ring with an upward arc surface, the jig fixture 1 comprises a first jig fixture 11 and a second jig fixture 12, the first jig fixture 11 and the second jig fixture 12 are distributed on two sides of the welding fixture in a mirror image manner, and the first jig fixture 11 and the second jig fixture 12 are connected in an openable manner; the inner walls of the first tire clamp 11 and the second tire clamp 12 define a placing cavity 13, and the placing cavity 13 is suitable for positioning the outer contour of the steel bar 3;

the welding assembly 2 is installed in placing the chamber 13, and the welding assembly 2 is applicable to each node of welding reinforcing bar 3.

In the actual production process, as shown in fig. 1, the steel bars 3 used by the steel bar cage can be divided into vertical steel bars 31, horizontal steel bars 32 and arc-shaped steel bars 33, a plurality of vertical steel bars 31, a plurality of horizontal steel bars 32 and a plurality of arc-shaped steel bars 33, so that the arc-shaped steel bar cage used by the subway segment is formed, the dividing method of the steel bars 3 used by the steel bar cage can optimize the bending process of the steel bars 3, the vertical steel bars 31 and the horizontal steel bars 32 only need to be limited in length, and do not need to be bent, but only need to be bent to the arc-shaped steel bars 33, the production flow of the steel bars 3 is optimized, and the production cost is further reduced.

The utility model provides a child fixture 1 adopts cambered surface semicircle ring up, as shown in fig. 2, after the welding is accomplished, can directly hoist, need not carry out the upset operation to the steel reinforcement cage again, avoid the problem of desoldering appearing in the upset in-process, in actual production, place earlier and erect reinforcing bar 31 and horizontal reinforcing bar 32, place arc reinforcing bar 33 in the chamber 13 of placing of child fixture 1 at last, avoid carrying out multistep measurement and marking off, avoid the production procedure overlength, after the welding is accomplished for the first time, can open first child fixture 11 and second child fixture 12, make the distance of first child fixture 11 and second child fixture 12 increase, place later on and erect reinforcing bar 31 and horizontal reinforcing bar 32, place arc reinforcing bar 33 in the chamber 13 of placing of new forming, weld for the second time again.

Reinforcing bar 3 is located places chamber 13, can accurate positioning steel bar 3's outline, makes things convenient for accurate control reinforcing bar 3's solder joint, and first child fixture 11 and second child fixture 12 can connect with opening and shutting, have made things convenient for the workman to operate every welding point in proper order, prevent because the solder joint is too much, and the problem of welding appears leaking.

In a further preferred embodiment, as shown in fig. 2, the first jig 11 comprises a first top jig 111 and a first bottom jig 112, the first top jig 111 being mounted on the top of the first jig 11, the first bottom jig 112 being mounted on the bottom of the first jig 11; a second top fixture 121 and a second bottom fixture 122 are arranged at corresponding positions of the second tire fixture 12, and the inner walls of the first top fixture 111, the first bottom fixture 112, the second top fixture 121 and the second bottom fixture 122 define a placing cavity 13; the first top fixture 111 and the second top fixture 121 are provided with vertical bar fixing holes 15, and the vertical bars 31 penetrate through the vertical bar fixing holes 15; the vertical bar fixing holes 15 are adapted to position the vertical bars 31.

The vertical reinforcing steel bar 31 penetrates through the vertical reinforcing steel bar fixing holes 15 of the first tire fixture 11 and the second tire fixture 12, so that the position of the vertical reinforcing steel bar 31 can be positioned in actual production, and the welding assembly 2 can be conveniently subjected to next operation; if the vertical rib fixing holes 15 are not arranged, much extra time is needed for scribing, so that the production efficiency is reduced; if erect reinforcing bar 31's position change, can change different child fixture 1 and answer different circumstances, both guaranteed the production welding efficiency to single specification model steel reinforcement cage, guaranteed its flexibility again, the convenience welds the steel reinforcement cage of other specifications.

In another preferred embodiment, as shown in fig. 2, a first sliding shaft hole 113 is formed in the first tire holder 11, a second sliding shaft hole 123 is formed in a corresponding position of the second tire holder 12, the tire holder 1 is provided with a sliding shaft 14, the sliding shaft 14 passes through the first sliding shaft hole 113 and the second sliding shaft hole 123, and the first tire holder 11 and the second tire holder 12 are connected in an openable and closable manner through the sliding shaft 14; the number of the slide shafts 14 is not less than three.

The arrangement of the sliding shafts 14 can reduce the friction force required when the first tire clamp 11 and the second tire clamp 12 can slide in an opening and closing manner, so that the required power output is reduced, and because the weight of the reinforcement cage and the tire clamp 1 is heavier, no less than three sliding shafts 14 need to be arranged in parallel, so that the friction force required by a sliding lock is further reduced, and the problem that the tire clamp 1 is clamped on the sliding shafts 14 to cause failure can be prevented; in this particular embodiment, 3 sliding shafts 14 are used.

In a further preferred embodiment, as shown in fig. 2, the first clamping fixture 11 is provided with first connecting ribs 114, and the first top clamping fixture 111 and the first bottom clamping fixture 112 are connected by the first connecting ribs 114; the second tire fixture 12 is provided with second coupling ribs 124 in a mirror image, and the second top fixture 121 and the second bottom fixture 122 are coupled by the second coupling ribs 124.

The first connecting rib 114 and the second connecting rib 124 are used for connecting the first top fixture 111 and the first bottom fixture 112, and the second top fixture 121 and the second bottom fixture 122 respectively, so that the weight of the tire fixture 1 can be reduced conveniently, the weight of the tire fixture 1 can be reduced to the maximum extent on the premise of ensuring the strength and the effect of the tire fixture 1, the material consumption and the energy consumption are reduced, and the cost is controlled.

Alternatively, as shown in fig. 2, the lateral side of the tire clamp 1 is provided with a transverse bar fixing hole 16, the transverse bar 32 passes through the transverse bar fixing hole 16, and the transverse bar fixing hole 16 is suitable for positioning the position of the transverse bar 32.

The transverse bar fixing hole 16 is formed in the tire clamp 1, so that the position of the transverse bar 32 is conveniently found, and the marking and unnecessary operation are reduced; secondly, the feeding is convenient, the feeding can be carried out from two sides of the clamping fixture 1 by using a mechanical arm or other devices, and the production efficiency of the reinforcement cage is further improved.

It is further preferred that the length of the transverse reinforcement 32 is the overall length of the reinforcement cage.

The length can all insert horizontal muscle fixed orifices 16 once when welding for the first time for the horizontal reinforcing bar 32 of steel reinforcement cage overall length, reduces the follow-up operation of inserting horizontal reinforcing bar 32, optimizes the welding procedure to simplified the cutting operation before the welding, the cost is reduced of maximize, and horizontal reinforcing bar 32 is the straight line, can reduce the operation of reinforcing bar bender, further increases the production efficiency of steel reinforcement cage.

In another preferred embodiment, the first top jig 111, the first bottom jig 112, the second top jig 121 and the second bottom jig 122 are provided with a welding-set rail 17, the shape of the welding-set rail 17 is identical to the shape of the arc-shaped reinforcing bars 33, and the welding set 2 is slidably coupled in the welding-set rail 17.

The welding assembly rails 17 embedded in the tire fixture 1 are arranged for the welding assembly 2, and four welding assembly rails 17 are arranged on the first top fixture 111, the first bottom fixture 112, the second top fixture 121 and the second bottom fixture 122 respectively, so that the welding efficiency can be increased in multiples, and the condition of welding missing is prevented; wherein the shape of welding subassembly track 17 is unanimous with the shape of arc reinforcing bar 33, can optimize the movement distance of welding subassembly 2 in welding subassembly track 17, reduces the removal of welding subassembly 2, increases welding speed, optimizes the welding procedure.

In a further preferred embodiment, as shown in fig. 2 to 4, the device for welding the subway segment steel reinforcement cage is provided with a driving assembly 4, wherein the driving assembly 4 is suitable for driving the first jig 11 and the second jig 12 to be connected in an openable and closable manner; the driving assembly 4 comprises a first sliding block 41, a second sliding block 42 and a lifting block 43, the first sliding block 41 is connected to the bottom of the first jig 11, the second sliding block 42 is connected to the bottom of the second jig 12, the lifting block 43 is arranged at a lower position in the middle of the jig 1, and the first sliding block 41 and the second sliding block 42 are rotatably connected with the lifting block 43.

In this embodiment, the lifting of the lifting block 43 is driven by a hydraulic cylinder, which can bear a large force and can be powered off to save energy during the welding process, but the height of the lifting block 43 can still be maintained, which has the effect of saving cost. When the lifting block 43 is located at the initial position, as shown in fig. 3, the gap between the first tire fixture 11 and the second tire fixture 12 is the smallest, and the longer transverse reinforcement 32 is first placed in and passes through the transverse reinforcement fixing hole 16; then, vertically-arranged reinforcing steel bars 31 are placed into the vertically-arranged reinforcing steel bar fixing holes 15; finally, arc-shaped reinforcing steel bars 33 are placed on the basis of the vertical reinforcing steel bars 31 and the transverse reinforcing steel bars 32, and then first welding is carried out; after the welding is finished, the lifting block 43 is lifted upwards, so that the first sliding block 41 slides leftwards on the sliding shaft 14, the second sliding block 42 slides rightwards on the sliding shaft 14, at this time, as shown in fig. 4, the first tire clamp 11 and the second tire clamp 12 are opened, the vertical reinforcing steel bars 31 and the arc-shaped reinforcing steel bars 33 are placed again, and the second welding is carried out; the process is repeated in a circulating mode, then the lifting block 43 is lifted upwards again, and third welding is carried out; and finally forming a complete subway segment steel reinforcement cage.

The foregoing has described the principles, principal features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and such changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (8)

1. The welding tool for the steel reinforcement cage of the subway pipe sheet is characterized by comprising a tire fixture and a welding assembly, wherein the tire fixture is suitable for positioning the position of a steel reinforcement, the tire fixture is in the shape of a semicircular ring with an upward arc surface, the tire fixture comprises a first tire fixture and a second tire fixture, the first tire fixture and the second tire fixture are distributed on two sides of the welding tool in a mirror image manner, and the first tire fixture and the second tire fixture are connected in an openable manner; the inner walls of the first tire clamp and the second tire clamp define a placing cavity, and the placing cavity is suitable for positioning the outer contour of the steel bar;

the welding assembly is installed place the intracavity, the welding assembly is applicable to the welding each node of reinforcing bar.

2. The welding tool for the steel reinforcement cage of the subway tube sheet as claimed in claim 1, wherein said first jig comprises a first top jig and a first bottom jig, said first top jig is installed on the top of said first jig, said first bottom jig is installed on the bottom of said first jig; a second top fixture and a second bottom fixture are arranged at corresponding positions of the second tire fixture, and inner walls of the first top fixture, the first bottom fixture, the second top fixture and the second bottom fixture define the placing cavity; the top parts of the first top fixture and the second top fixture are provided with vertical bar fixing holes, and vertical bars penetrate through the vertical bar fixing holes; the vertical bar fixing holes are suitable for positioning the positions of the vertical bars.

3. The welding tool for the steel reinforcement cage of the subway tube as claimed in claim 1, wherein a first sliding shaft hole is formed at the bottom of said first jig, a second sliding shaft hole is formed at the corresponding position of said second jig, said jig is provided with a sliding shaft, said sliding shaft passes through said first sliding shaft hole and said second sliding shaft hole, and said first jig and said second jig are openably connected by said sliding shaft; the number of the sliding shafts is not less than three.

4. The welding tool for the steel reinforcement cage of the subway pipe piece as claimed in claim 2, wherein said first jig is provided with a first connecting rib, and said first top jig and said first bottom jig are connected by said first connecting rib; the second clamping fixture is provided with a second connecting rib in a mirror image mode, and the second top clamping fixture is connected with the second bottom clamping fixture through the second connecting rib.

5. The welding fixture for a subway tube sheet reinforcement cage as claimed in claim 1, wherein lateral side of said jig is provided with transverse bar fixing holes through which transverse bars pass, said transverse bar fixing holes being adapted to position said transverse bars.

6. The welding fixture of claim 5, wherein the length of the transverse reinforcement is the total length of the reinforcement cage.

7. The welding fixture for a metro tube sheet reinforcement cage according to claim 2, wherein inner walls of the first top fixture, the first bottom fixture, the second top fixture and the second bottom fixture are provided with a welding assembly rail, a shape of the welding assembly rail is identical to a shape of the arc-shaped reinforcement, and the welding assembly is slidably connected in the welding assembly rail.

8. The welding tool for the subway segment steel reinforcement cage as claimed in claim 1, wherein said device for welding the subway segment steel reinforcement cage is provided with a driving assembly, said driving assembly is adapted to drive said first clamping fixture and said second clamping fixture to connect in an openable manner; the driving assembly comprises a first sliding block, a second sliding block and a lifting block, the first sliding block is connected to the bottom of the first tire fixture, the second sliding block is connected to the bottom of the second tire fixture, the lifting block is installed in the middle of the tire fixture, and the first sliding block and the second sliding block are rotatably connected with the lifting block.

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