CN113997734A

CN113997734A - Hollow tire dismounting device

Info

Publication number: CN113997734A
Application number: CN202111514014.1A
Authority: CN
Inventors: 徐鹏; 孙腾
Original assignee: Shandong Mclaren Tire Co ltd
Current assignee: Shandong Hongxin New Energy Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-10
Publication date: 2022-02-01
Anticipated expiration: 2041-12-10
Also published as: CN113997734B

Abstract

Fretwork tire dismouting equipment, including the deck plate on the frame and on the frame, install the lift disc on the deck plate, the interior week of fretwork tire can be realized to the slider of strutting that sets up on the lift disc, still install between lift disc and the frame and vertically move direction resetting means, vertical push down the device and can drive the lift disc and descend to deck plate position department at the in-process that promotes the wheel hub and move down, and then make in the wheel hub enters into the fretwork tire that struts, it drives the lift disc and resets to initial condition to erect to move direction resetting means after the installation is accomplished, so that the installation operation of next time. The device realizes the installation of the wheel hub in the hollow-out tire, not only reduces the labor intensity, but also greatly improves the installation efficiency and quality.

Description

Hollow tire dismounting device

Technical Field

The invention relates to the technical field of tire dismounting equipment, in particular to hollow tire dismounting equipment.

Background

Different from the existing pneumatic tire, the hollow tire is an inflation-free tire, has a firm structure and has the characteristic of inflation-free maintenance, when the hub of the hollow tire is disassembled and assembled, the inner periphery of the hollow tire needs to be expanded, then the hub is placed into the hollow tire, and finally the installation of the hub can be realized after the expanded hollow tire is loosened. Because the application range of the prior hollow tire is limited, the hub installation of the hollow tire mostly depends on manual installation, the operation is complex, and the installation efficiency of the hub in the hollow tire is greatly reduced.

Disclosure of Invention

The invention aims to provide a hollow tire dismounting device, which is a hub dismounting device specially designed for a hollow tire, wherein the inner periphery of the hollow tire is unfolded through an unfolding sliding block, and then a hub is pushed into the hollow tire through a vertical pressing device, so that the hub is quickly mounted, and the problems in the prior art are solved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a hollow tire dismounting device which comprises a rack, wherein a table board is arranged on the rack, a vertical moving hole is formed in the table board, a lifting disc capable of moving vertically is arranged in the vertical moving hole in a matched mode, a vertical pressing device is further arranged on the rack and located at the upper side position of the lifting disc, the vertical pressing device can push the lifting disc to move downwards to the bottom of the table board, a plurality of guide grooves circumferentially arranged along the radius direction are formed in the lifting disc, a spreading sliding block is arranged in each guide groove and can move synchronously along the length direction of each guide groove, and the spreading sliding block can fall to the lower side of the table board along with the lifting disc. The vertical pressing device is a lifting oil cylinder, the lifting oil cylinder is located on the upper side of the lifting disc, a piston rod of the lifting oil cylinder moves downwards to push the lifting disc to move downwards along the vertical direction, a hydraulic system and a control system are further mounted on the rack, the hydraulic system is communicated with the lifting oil cylinder through an oil way, and the control system is connected with the hydraulic system through a control circuit. The lifting disc is provided with four guide grooves arranged in the circumference, the opening sliders are provided with synchronous opening devices, the synchronous opening devices can drive four opening sliders to move synchronously, each synchronous opening device comprises a rotary disc, the rotary discs are installed at the circle center positions of the bottoms of the lifting discs through rotating shafts, the rotary discs can rotate relative to the lifting discs, the rotary discs are provided with four connecting claws, the bottoms of the opening sliders penetrate out of the guide grooves and are connected with sliding support rods, each sliding support rod is hinged with the corresponding connecting claw through a rotary pull plate, a telescopic oil cylinder is hinged between the two sliding support rods at the same diameter position of the lifting discs, the two telescopic oil cylinders are arranged in a cross mode, and the telescopic oil cylinders can drive the four opening sliders to move synchronously when stretching. A vertical movement guiding reset device is arranged between the lifting disc and the frame and can drive the lifting disc to rise along the vertical direction, the vertical movement guiding reset device comprises four groups of vertical movement guiding reset mechanisms, each vertical movement guiding reset mechanism comprises a fixed plate arranged at the bottom of the lifting disc, a lifting support rod is hinged on one side of the fixed plate, one end of the lifting support rod is hinged on the fixed plate, the other end of the lifting support rod is connected with the frame through a reset spring, a splint seat is arranged on the table board, a first pin shaft is arranged on the splint seat, a long groove matched with the first pin shaft is arranged on the lifting support rod, the reset spring always has the tendency of pulling the lifting support rod to move downwards until the first pin shaft is positioned in the long groove and close to one end of the fixed plate, and second pin shafts are arranged on two side surfaces of the lifting support rod close to one end of the reset spring, the second pin shaft and the first pin shaft are connected with a deviation rectifying spring, the lifting support rod is located between the two deviation rectifying springs, the elastic force of one of the deviation rectifying springs is larger than that of the other deviation rectifying spring, the table board is further provided with a guide plate, a vertical groove matched with the fixing plate is formed in the guide plate, and the fixing plate can vertically lift along the vertical groove. The fixed plate extends out of the bottom position of the lifting disc, when the lifting disc vertically ascends, the fixed plate can move to the bottom position of the table board along the vertical groove, and the fixed plate cannot penetrate through the vertical moving hole. The top surface of the strutting slide block is provided with a jack, and an inserting rod is arranged in the jack.

The invention has the positive effects that: the hollow tire dismounting and mounting equipment comprises an organic frame and a table board arranged on the organic frame, wherein a lifting disc is arranged on the table board, a spreading slide block arranged on the lifting disc can realize spreading operation of the inner periphery of a hollow tire, a vertical moving guiding and resetting device is also arranged between the lifting disc and the frame, the vertical pressing device can drive the lifting disc to be lowered to the position of the table board in the process of pushing a hub to move downwards, the hub is further enabled to enter the spread hollow tire, and the vertical moving guiding and resetting device drives the lifting disc to be reset to an initial state after mounting is completed, so that the next mounting operation is facilitated. The device realizes the installation of the wheel hub in the hollow-out tire, not only reduces the labor intensity, but also greatly improves the installation efficiency and quality.

Drawings

FIG. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a view from the direction A of FIG. 2;

FIG. 4 is a view from the direction B of FIG. 3;

FIG. 5 is an enlarged view of the cross-sectional view taken along line C-C of FIG. 3;

FIG. 6 is a schematic view of the distracting slide of the FIG. 3 configuration in an open position;

FIG. 7 is a schematic view of the structure of FIG. 4 with the distraction slide open;

FIG. 8 is a schematic structural view of a vertical movement guiding reset device arranged on the lifting disc;

FIG. 9 is a schematic structural view of a set of vertical displacement guide return mechanisms;

FIG. 10 is a view from direction D of FIG. 9;

FIG. 11 is an enlarged view taken along line E-E in FIG. 10;

FIG. 12 is a schematic view showing the state of the vertical movement guide returning mechanism when the elevating disk is moved downward;

FIG. 13 is a schematic view of the overall device with the spreader slide lowered to the deck plate position;

FIG. 14 is a schematic structural view of the spreader slide with the inserted bar;

fig. 15 is a schematic diagram of a structure of installing two deviation rectifying springs with different torsion forces on a lifting support rod.

Detailed Description

The invention relates to a hollow tire dismounting device, which comprises a rack 1, wherein the rack 1 is used as an installation base of the whole device, a table board 2 is installed on the rack 1, a hollow tire to be installed is placed on the table board 2, as shown in fig. 3, a vertical moving hole 3 is formed in the table board 2, a lifting disc 4 capable of moving vertically is installed in the vertical moving hole 3 in a matching mode, the diameter of the vertical moving hole 3 is smaller than that of the hollow tire to be installed, and the hollow tire is always located on the table board 2 in the process of installing a hub by the hollow tire.

The frame 1 is also provided with a vertical pressing device which is positioned at the upper side of the lifting disc 4 and can push the lifting disc 4 to move downwards to the bottom of the table panel 2. The vertical pressing device can be an existing electric push rod or an existing actuating component such as an air cylinder, a pressing plate is installed on a piston rod of the vertical pressing device, and the lifting disc 4 is pushed to descend through vertical movement of the pressing plate. As shown in fig. 3, a plurality of guide grooves 6 arranged along the circumference of the radius direction are formed in the lifting disc 4, a spreading slider 7 is installed in each guide groove 6, the spreading slider 7 can move synchronously along the length direction of the guide groove 6, the spreading slider 7 is placed on the inner periphery of the hollow tire to be installed, and when the spreading slider 7 moves away from each other, the inner diameter of the hollow tire can be spread, so that the subsequent installation of the hub is realized. The opening sliding block 7 can move vertically along with the lifting disc 4 synchronously, and can fall to the lower side of the table board 2 along with the lifting disc 4, so that the wheel hub enters the hollow tire to be installed.

When the hub in the hollow tire is installed, the hollow tire is placed on the table panel 2, the spreading slide block 7 is positioned on the inner periphery of the hollow tire, then the hub is placed on the hollow tire, the hub is positioned on the upper side of the matching position of the inner periphery of the hollow tire, then the spreading slide block 7 is mutually separated in the guide groove 6, the inner periphery diameter of the hollow tire is enlarged until the outer periphery diameter of the spreading slide block 7 is matched with the hub, namely the hub can enter the spread hollow tire, then the vertical pressing device is started to push the hub to move downwards, the spreading slide block 7 and the lifting disc 4 are pushed to move downwards in the downward moving process of the hub, because the diameter of the hollow tire is larger than that of the vertical moving hole 3, the hollow tire can stay on the table panel 2, the hub can gradually enter the hollow tire in the downward moving process, and the spreading slide block 7 on the lifting disc 4 is pushed to move downwards to be flush with the table panel 2, at the moment, the expanding slide block 7 is separated from the hollow tire, and the expanded hollow tire tightly holds the inner hub to complete installation.

Wherein the vertical movement of the lifting disc 4 can be realized through the existing electric push rod, air cylinder or other power cylinders through the guide rail and slider mechanism, so as to ensure that the downwards moved wheel hub drives the distraction slider 7 to move downwards, thereby replacing the distraction slider 7 to enter the hollow-out tire to be installed.

Further, in order to facilitate the accurate control of the vertical pressing device on the lower pressure degree and distance of the hub, the vertical pressing device is a lifting oil cylinder 5, the lifting oil cylinder 5 is located at the upper side position of the lifting disc 4, a piston rod of the lifting oil cylinder 5 moves downwards to push the lifting disc 4 to move downwards along the vertical direction, a hydraulic system and a control system are further installed on the rack 1, the hydraulic system is communicated with the lifting oil cylinder 5 through an oil way, the control system is connected with the hydraulic system through a control circuit, the accurate control on the pressing of the hub is realized through hydraulic transmission, and the quality of the hub installation is further ensured.

Further, in order to ensure that all the distraction sliders 7 move synchronously when the distraction sliders 7 move away from each other, so as to realize uniform distraction of the inner periphery of the hollowed-out tire, and facilitate the subsequent wheel hub to smoothly enter the hollowed-out tire, the distraction sliders 7 are provided with synchronous distraction devices, and taking the four guide grooves 6 arranged circumferentially as an example, which are arranged on the lifting disc 4 shown in fig. 3, the synchronous distraction devices can drive the four distraction sliders 7 to move synchronously.

As shown in fig. 4, the synchronous opening device includes a rotating plate 8, the rotating plate 8 is installed at the position of the center of the circle at the bottom of the lifting disc 4 through a rotating shaft, and the rotating plate 8 can rotate relative to the lifting disc 4. Four connecting claws 9 are arranged on the rotary disc 8, as shown in fig. 5, the bottom of each spreading slide block 7 penetrates out of the guide groove 6 and is connected with a sliding stay bar 10, each sliding stay bar 10 is hinged with the corresponding connecting claw 9 through a rotary pull plate 11, a telescopic oil cylinder 12 is hinged between the two sliding stay bars 10 at the same diameter position of the lifting disc 4, in order to save the installation space of the bottom, the two telescopic oil cylinders 12 can be arranged in a cross mode, the telescopic oil cylinders 12 are communicated with a hydraulic system through oil ways, and the four spreading slide blocks 7 can be driven to move synchronously when the telescopic oil cylinders 12 are stretched.

When the strutting sliding blocks 7 need to be synchronously separated from each other in the guide groove 6 to strut the inner periphery of the hollow tire, the piston rods of the telescopic oil cylinders 12 extend out to drive one of the sliding support rods 10 to move away from the direction of the convolution disc 8, namely, the strutting sliding blocks 7 are synchronously separated from each other in the guide groove 6, the convolution disc 8 is driven to rotate through the transmission of the convolution pull plate 11 and the connecting claws 9 in the process, the rotating convolution disc 8 can ensure that the four groups of sliding support rods 10 are synchronously opened, and as shown in fig. 6 and 7, the synchronous opening of the strutting sliding blocks 7 is completed.

In order to adapt to the installation of different diameter type fretwork tires, can also install the adjusting device of the flexible length of control flexible hydro-cylinder 12 ration on frame 1, just also realize the quantitative control to flexible hydro-cylinder 12 piston rod extension length through the hydraulic oil that control entered into flexible hydro-cylinder 12, realize the regulation installation to different diameter type fretwork tires.

Further, in order to ensure that the lifting disc 4 can move downwards along the vertical direction in the installation process and that the spreading slide 7 which descends below the table panel 2 can move upwards along the vertical direction to reset to an initial state after the hub is installed in the hollow tire, so as to facilitate the subsequent installation operation of the hollow tire, a vertical movement guiding and resetting device is installed between the lifting disc 4 and the rack 1. The vertical moving guiding and resetting device can play a role in guiding the vertical movement of the lifting disc 4, the vertical lifting of the lifting disc 4 in the vertical moving hole 3 is guaranteed, after the hub is installed, the vertical pressing device relieves the pressing on the hub, under the action of the vertical moving guiding and resetting device, the lifting disc 4 and the spreading slide block 7 on the lifting disc can move upwards for resetting, the hub-installed hollow tire also rises from the table board 2, and the hollow tire is taken away conveniently and is prepared for the installation of the next hollow tire.

As shown in fig. 8 and 9, the vertical movement guiding and returning device includes four sets of vertical movement guiding and returning mechanisms, each vertical movement guiding and returning mechanism includes a fixed plate 13 disposed at the bottom of the lifting disc 4, a lifting support rod 14 is hinged to one side of the fixed plate 13, one end of the lifting support rod 14 is hinged to the fixed plate 13, and the other end of the lifting support rod 14 is connected to the frame 1 through a return spring 15. The table panel 2 is provided with a clamping plate seat 16, the clamping plate seat 16 is provided with a first pin shaft 17, as shown in fig. 11, the lifting support rod 14 is provided with a strip groove 18 matched with the first pin shaft 17, and the return spring 15 always tends to pull the lifting support rod 14 to move downwards until the first pin shaft 17 is located in the strip groove 18 and close to one end of the fixed plate 13.

Two side surfaces of the lifting support rod 14 near one end of the return spring 15 are both provided with a second pin 19, a deviation-correcting spring 20 is connected between the second pin 19 and the first pin 17, as shown in fig. 10, the lifting support rod 14 is positioned between the two deviation-correcting springs 20, and the elasticity of one deviation-correcting spring 20 is greater than that of the other deviation-correcting spring 20. Still install deflector 21 on deck plate 2, set up the vertical groove 22 with fixed plate 13 matched with on the deflector 21, fixed plate 13 can carry out vertical lift along vertical groove 22.

When the vertical pressing device does not push the lifting disc 4 to move downwards, the state of the vertical movement guiding and resetting mechanism is shown in fig. 9, at this time, the lifting support rod 14 forms an included angle of 45 degrees with the vertical direction, the fixing plate 13 is positioned at the bottom of the table board 2, and the lifting support rod 14 is in a relatively static state under the action of the two deviation-correcting springs 20 and the resetting spring 15. When the vertical pushing device pushes the lifting disc 4 to vertically move downwards, the fixing plate 13 at the bottom of the lifting disc 4 synchronously moves downwards, the lifting disc 4 vertically descends under the guiding action of the guide plate 21, in the descending process, the lifting support rod 14 rotates anticlockwise in the direction shown in fig. 9, in the rotating process, the first pin shaft 17 continuously and relatively moves in the long strip groove 18, so that the vertical downward movement of the hinged end of the lifting support rod 14 and the fixing plate 13 is ensured, the arrangement of the clamp plate seat 16 also provides limitation for the rotation of the lifting support rod 14, the rotating and downward movement of the lifting support rod 14 is avoided, and the fixing plate 13 is separated from the vertical groove 22.

When the fixing plate 13 at one end of the lifting support rod 14 moves downwards, the other end of the lifting support rod 14 stretches the return spring 15 to store energy until the state shown in fig. 12, at this time, the top surface of the spreading slide 7 is lowered to the position of the table top plate 2, the installation of the hub is completed, and the lifting support rod 14 also rotates to the horizontal state shown in fig. 12. The subsequent fretwork tire that will install the completion is ejecting from deck plate 2, vertical push-down device cancel to wheel hub, strut slider 7 and the downward pressure of lift disc 4, reset spring 15 of energy storage resumes the original state, drive lift bracing piece 14 clockwise rotation in the direction that figure 12 shows, under the guide effect of deflector 21, fixed plate 13 and lift disc 4 shift up vertically in step, accomplish the restoration of lift disc 4, it is ejecting to install the fretwork tire of completion, be convenient for take off, for next fretwork tire's installation ready work has been done simultaneously.

When the lifting support rod 14 rotates to the horizontal state shown in fig. 12, the fixing plate 13 receives the force in the horizontal direction in the vertical groove 22, at this time, the fixing plate 13 is easy to generate the situation that the vertical groove 22 is blocked and is not reset any more, in order to avoid the situation, two deviation rectifying springs 20 on the same lifting support rod 14 are provided, one elastic force is small, the other elastic force is large, the lifting support rod 14 can be ensured to be in a continuously vibrating state all the time in the rotating process of the lifting support rod 14, and the phenomenon of blocking due to vertical movement can be effectively prevented.

In four sets of vertical movement direction canceling release mechanical systems, two deviation rectifying springs 20 that the looks interval set up the same, two deviation rectifying springs 20 that adjacent set up oppositely, that is to say that wherein two sets of corresponding deviation rectifying springs 20 that set up in the vertical movement direction canceling release mechanical system, the big elasticity on right side of left elasticity is little, and the other two sets of vertical movement direction canceling release mechanical system's of the big elasticity on right side of elasticity that, just need the elasticity on the little right side of left elasticity to be big. On the premise of the above structure, once two sets of corresponding fixing plates 13 and vertical grooves 22 are about to be locked, the other two sets of deviation rectifying springs 20 drive the lifting support rods 14 and the lifting disc 4 to vibrate, so as to avoid the locking phenomenon. As shown in fig. 15, the deviation rectifying springs 20 on the two horizontally arranged lifting support rods 14 are small in elasticity on the left side and large in elasticity on the right side, the deviation rectifying springs 20 on the two vertically arranged lifting support rods 14 are large in elasticity on the left side and small in elasticity on the right side, the two horizontally arranged lifting support rods 14 have a trend of clockwise rotation in the direction shown in fig. 15 due to the reason that the deviation rectifying springs 20 on the two horizontally arranged lifting support rods are poor in elasticity, the two vertically arranged lifting support rods 14 have a trend of counterclockwise rotation, the rotating trends are opposite, when the fixing plates 13 of the two corresponding sets of lifting support rods 14 are about to be jammed, the other two sets of deviation rectifying springs 20 drive the lifting support rods 14 and the lifting disc 4 to generate reverse vibration, and therefore the phenomenon that the fixing plates 13 are jammed is avoided.

Further, in order to make the vertical movement guiding reset device drive the lifting disc 4 to move up and reset, the lifting disc 4 can be effectively limited, so that the lifting disc 4 can stop moving when moving up to a specified position, the fixing plate 13 extends out of the bottom position of the lifting disc 4, when the lifting disc 4 vertically ascends, the fixing plate 13 can move to the bottom position of the platform panel 2 along the vertical groove 22, half of the upper position of the fixing plate 13 can be fixed on the lifting disc 4, the other half of the upper position extends out of the lifting disc 4, the circumferential diameter formed by the four fixing plates 13 is larger than the diameter of the vertical movement hole 3, when the lifting disc 4 moves up, only the fixing plate 13 can move up to the bottom surface of the platform panel 2, and at the moment, the lifting disc 4 moves up to an initial state. The vertical upward movement of the lifting disc 4 is formed by the movement of the reset spring 15, the limit of the lifting disc 4 can effectively prevent the lifting disc 4 from excessively moving upward to the upper side of the table board 2, and the shaking caused by the elastic force of the reset spring 15 can also be avoided, so that the service life of the device is prolonged.

Further, in order to realize the dismounting operation of the device for the hollow tire with the hub, as shown in fig. 14, the top surface of the opening slider 7 is provided with an insertion hole 23, an insertion rod 24 is installed in the insertion hole 23, when dismounting is performed, the hollow tire is placed on the opening slider 7, the insertion rod 24 on the hollow tire is inserted into the hollow tire hole, then the opening slider 7 is opened, the hollow tire is enlarged until the hollow tire loses the clamping force on the inner hub, and then the inner hub is manually taken out.

The technical solution of the present invention is not limited to the scope of the embodiments of the present invention. The technical contents not described in detail in the present invention are all known techniques.

Claims

1. The utility model provides a fretwork tire dismouting equipment which characterized in that: including frame (1), install deck plate (2) on frame (1), seted up on deck plate (2) and erected and move hole (3), erect and move hole (3) fit in and install lift disc (4) that can vertical migration, still install vertical push down device on frame (1), vertical push down device is located the upside position of lift disc (4), and vertical push down device can promote lift disc (4) and move down to deck plate (2) bottom, set up a plurality of guide way (6) of arranging along the radius direction circumference on lift disc (4), all install in every guide way (6) and strut slider (7), strut the length direction synchronous motion that slider (7) can follow guide way (6), strut slider (7) and can follow lift disc (4) and fall to deck plate (2) downside.

2. The fretwork tire dismouting equipment of claim 1, characterized in that: the vertical pressing device is a lifting oil cylinder (5), the lifting oil cylinder (5) is located at the upper side position of a lifting disc (4), a piston rod of the lifting oil cylinder (5) moves downwards to push the lifting disc (4) to move downwards along the vertical direction, a hydraulic system and a control system are further installed on the rack (1), the hydraulic system is communicated with the lifting oil cylinder (5) through an oil way, and the control system is connected with the hydraulic system through a control circuit.

3. The fretwork tire dismouting equipment of claim 1, characterized in that: four guide grooves (6) which are circumferentially arranged are formed in the lifting disc (4), a synchronous opening device is installed on the opening sliding blocks (7) and can drive the four opening sliding blocks (7) to synchronously move, the synchronous opening device comprises a rotary disc (8), the rotary disc (8) is installed at the circle center position of the bottom of the lifting disc (4) through a rotating shaft, the rotary disc (8) can rotate relative to the lifting disc (4), four connecting claws (9) are arranged on the rotary disc (8), the bottom of each opening sliding block (7) penetrates through the guide grooves (6) and is connected with sliding support rods (10), each sliding support rod (10) is hinged with the corresponding connecting claw (9) through a rotary pull plate (11), and a telescopic oil cylinder (12) is hinged between the two sliding support rods (10) at the same diameter position of the lifting disc (4), the two telescopic oil cylinders (12) are arranged in a cross mode, and the four spreading sliding blocks (7) can be driven to synchronously move when the telescopic oil cylinders (12) stretch.

4. The fretwork tire dismouting equipment of claim 1, characterized in that: install between lift disc (4) and frame (1) and erect and move direction resetting means, erect and move direction resetting means and can drive lift disc (4) and rise along vertical direction, erect and move direction resetting means and include that four groups erect and move direction canceling release mechanical system, every erects to move direction canceling release mechanical system and all includes fixed plate (13) that set up in lift disc (4) bottom, the articulated lifting support pole (14) of installing in one side of fixed plate (13), the one end of lifting support pole (14) articulates on fixed plate (13), the other end of lifting support pole (14) is connected with frame (1) through reset spring (15), install clamp plate seat (16) on deck plate (2), install first round pin axle (17) on clamp plate seat (16), set up on lifting support pole (14) and sell axle (17) matched with rectangular groove (18), reset spring (15) have all the pulling lifting support pole (14) to move down to first round pin axle (17) and be located rectangular groove (17) (18) Interior trend that is close to fixed plate (13) one end all installs second round pin axle (19) on lifting support pole (14) are close to the both sides face of reset spring (15) one end, is connected with between second round pin axle (19) and first round pin axle (17) and rectifies spring (20), and lifting support pole (14) are located between two springs (20) of rectifying, and one of them spring (20) elasticity of rectifying is greater than the elasticity of another spring (20) of rectifying, still install deflector (21) on deck plate (2), seted up on deflector (21) with fixed plate (13) matched with vertical groove (22), fixed plate (13) can carry out vertical lift along vertical groove (22).

5. The fretwork tire dismouting equipment of claim 4, characterized in that: the fixed plate (13) extends out of the bottom position of the lifting disc (4), when the lifting disc (4) vertically ascends, the fixed plate (13) can move to the bottom position of the table panel (2) along the vertical groove (22), and the fixed plate (13) cannot penetrate through the vertical moving hole (3).

6. The fretwork tire dismouting equipment of claim 1, characterized in that: the top surface of the strutting slide block (7) is provided with an inserting hole (23), and an inserting rod (24) is arranged in the inserting hole (23).