Multifunctional distance-adjustable beam transporting vehicle

Abstract

The utility model relates to the technical field of beam transporting vehicles, in particular to a multifunctional distance-adjustable beam transporting vehicle which comprises a transporting vehicle body, a fixing plate is installed on the transporting vehicle body, a limiting plate is installed at the end, away from the fixing plate, of the transporting vehicle body, and a first adjusting mechanism is arranged on the fixing plate. A second adjusting mechanism is arranged between the limiting plate and the first adjusting mechanism, and a supporting mechanism and a damping mechanism are symmetrically arranged at the end, away from the first adjusting mechanism, of the transport vehicle body. By arranging the first adjusting mechanism and the second adjusting mechanism, beam bodies of different specifications can be limited and supported left and right and front and back, and the efficiency of installing and transporting the beam bodies is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technology field of girder transport vehicle, concretely relates to a multifunctional adjustable distance girder transport vehicle. BACKGROUND

[0002] The girder transport vehicle can efficiently transport long, large and heavy bridge components and accurately place them at the designated position, ensuring the construction quality and safety.

[0003] During the transportation process, the girder transport vehicle may encounter various complex road conditions and terrains, such as uneven roads, slopes, curves, etc. Due to factors such as road conditions and wind, the girder body may be displaced or tilted, which will not be conducive to improving the safety of transportation. Under normal circumstances, workers need to limit the girder body after transporting it, and then equip it with a shock-absorbing component to avoid unnecessary damage to the girder body caused by bumps on the road, which reduces the efficiency of installing and transporting the girder body.

[0004] Based on this, a multifunctional adjustable distance girder transport vehicle is provided to eliminate the drawbacks of existing devices. UTILITY MODEL CONTENTS

[0005] To solve the above problems, a multifunctional adjustable distance girder transport vehicle is provided, which solves the problem of low efficiency of girder transportation installation and shock absorption through a supporting mechanism and a shock-absorbing mechanism.

[0006] To solve the problems of the prior art, the utility model provides a multifunctional adjustable distance girder transport vehicle, which comprises a transport vehicle main body, a fixed plate is installed on the transport vehicle main body, a limiting plate is installed on the transport vehicle main body away from the fixed plate, a first adjusting mechanism is arranged on the fixed plate, and a second adjusting mechanism is arranged between the limiting plate and the first adjusting mechanism.

[0007] Preferably, the first adjusting mechanism comprises a jack, an adjusting plate, a first mounting frame and a sliding guide rail, the jack is installed on the side wall of the fixed plate, the output end of the jack is connected to the side wall of the adjusting plate, the first mounting frame is arranged on the transport vehicle main body, the sliding guide rail is arranged on the first mounting frame, and the first mounting frame is slidably connected to the end of the adjusting plate close to the sliding guide rail.

[0008] Preferably, the second adjusting mechanism comprises a driving motor, a bidirectional screw rod, a second mounting frame and an adjusting block, the second mounting frame is installed between the limiting plate and the first mounting frame on the transport vehicle main body, the driving motor is installed on the transport vehicle main body, the output end of the driving motor is connected to the bidirectional screw rod, the other end of the bidirectional screw rod penetrates through the side wall of the second mounting frame, the threads on the two ends of the bidirectional screw rod are opposite, the adjusting blocks are symmetrically and slidably arranged on the side wall of the second mounting frame, the lower end of the adjusting block is slidably connected to the first mounting frame, the adjusting block is internally provided with threads matched with the first mounting frame, and the connecting mechanism is symmetrically arranged on the transport vehicle main body.

[0009] Preferably, the connecting mechanism comprises a first bevel gear, a second bevel gear, a rotating shaft, a supporting sleeve and a fixing frame, the fixing frame is symmetrically arranged on the side wall of the transport vehicle body, the supporting sleeve is installed on the fixing frame, one end of the rotating shaft is rotationally connected with the side wall of the fixing frame, the other end of the rotating shaft penetrates through the supporting sleeve and is connected with the second bevel gear, the second bevel gear is engaged with the first bevel gear, the first bevel gear is installed at the two ends of the bidirectional spiral rod, and the support mechanism and the damping mechanism are symmetrically arranged on the end of the transport vehicle body away from the first adjusting mechanism.

[0010] Preferably, the support mechanism comprises a large gear, a small gear, an installation shaft plate, a bearing plate, a support arm, a support frame, an adjusting arm, a connecting arm, a receiving frame, a rubber ball and an installation disc, the installation disc is symmetrically installed on the transport vehicle body, the installation shaft plate is installed on one end of the side wall of the installation disc, the support frame is installed on the other end of the side wall of the installation disc, one end of the bearing plate is rotationally arranged on the side wall of the installation shaft plate, the other end of the bearing plate penetrates through the side wall of the installation shaft plate and is connected with the large gear, the large gear is engaged with the small gear, the small gear is arranged on the outer wall of the rotating shaft, the support arm is installed on the side wall of the support frame, one end of the adjusting arm is rotationally connected with one end of the installation shaft plate, the other end of the adjusting arm is rotationally connected with the connecting arm, the connecting arm is rotationally arranged on the side wall of the support arm close to one end of the adjusting arm, the receiving frame is installed on the other end of the connecting arm away from the adjusting arm, and a plurality of rubber balls are rotationally installed on the receiving frame.

[0011] Preferably, the damping mechanism comprises a gear, a rack, an installation column, a sliding plate, a sliding block, a first sleeve, a sliding rod, a second sleeve, an abutting rod, a damping spring, a connecting plate, a supporting shaft plate, a semicircular shaft, a semicircular sliding sleeve and a rubber abutting plate, the installation disc is arranged on the transport vehicle body, installation columns are arranged on the two sides of the installation disc, the sliding plate is slidably arranged on the installation column, the sliding block is installed on the side wall of the sliding plate, the rack is installed on the side wall of the sliding plate close to the rotating shaft, the rack is engaged with the gear, the gear is arranged on the outer wall of the rotating shaft, the rack is installed on the side wall of the sliding plate, the sliding plate is slidably arranged on the installation column, the sliding block is arranged on the side wall of the sliding plate, a plurality of first sleeves are symmetrically arranged on the sliding block, the sliding rod is slidably arranged in the first sleeve, a plurality of second sleeves are arranged between the first sleeves on the sliding block, the abutting rod is slidably arranged in the second sleeve, the connecting plate is connected between the upper ends of the abutting rod and the sliding rod, the damping spring is connected between the side walls of the connecting plate and the second sleeve, the supporting shaft plate is symmetrically arranged on the top wall of the connecting plate, the semicircular shaft is installed between the supporting shaft plates, the semicircular sliding sleeve is slidably arranged on the semicircular shaft, and the rubber abutting plate is arranged on the semicircular sliding sleeve away from the connecting plate.

[0012] The utility model discloses have the beneficial effect compared with prior art is:

[0013] The utility model discloses through setting first adjusting mechanism and second adjusting mechanism can the left and right and the front and back location support of different specifications' beam body, improved the efficiency of installation transportation beam body. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a kind of multifunctional adjustable distance beam transport car's three-dimensional structure diagram Figure 1 .

[0015] Figure 2 It is a kind of multifunctional adjustable distance beam transport car's three-dimensional structure diagram Figure 2 .

[0016] Figure 3 It is a kind of multifunctional adjustable distance beam transport car's partial three-dimensional structure diagram.

[0017] Figure 4 It is a kind of multifunctional adjustable distance beam transport car's damping mechanism three-dimensional structure diagram.

[0018] Figure 5 It is a kind of multifunctional adjustable distance beam transport car's support mechanism three-dimensional structure diagram.

[0019] In the drawing, the reference numerals are: 101, transport car main body;102, fixed plate;103, limit plate;200, first adjusting mechanism;201, jack;202, adjusting plate;203, first mounting bracket;204, sliding guide rail;300, second adjusting mechanism;301, drive motor;302, two-way screw rod;303, second mounting bracket;304, adjusting block;400, connecting mechanism;401, first helical gear;402, second helical gear;403, rotating shaft;404, support sleeve ring;405, fixed bracket;500, support mechanism;501, large gear;502, pinion;503, mounting shaft plate;504, bearing plate;505, support arm;506, support bracket;507, adjusting arm;508, connecting arm;509, receiving bracket;510, rubber ball;511, mounting disc;600, damping mechanism;601, gear;602, rack;603, mounting column;604, sliding plate;605, sliding block;606, first sleeve;607, sliding rod;608, second sleeve;609, abutment rod;610, damping spring;611, connecting plate;612, support shaft plate;613, semicircular shaft;614, semicircular sliding sleeve;615, rubber abutment plate. DETAILED DESCRIPTION

[0020] In order to further understand the features, technical means and specific purposes and functions reached by the utility model, the utility model is described in further detail below in combination with the drawings and specific embodiments.

[0021] Refer toFigures 1-5 The utility model provides a multifunctional adjustable distance beam transport vehicle, including transport vehicle body 101, fixed plate 102 is installed on transport vehicle body 101, limit plate 103 is installed on transport vehicle body 101 away from fixed plate 102 one end, first adjusting mechanism 200 is equipped on fixed plate 102, second adjusting mechanism 300 is equipped between limit plate 103 and first adjusting mechanism 200.

[0022] First adjusting mechanism 200 and second adjusting mechanism 300 are used to limit and support the beam body in front and back and left and right of different specifications, improve the efficiency of beam body transportation, through the linkage of setting support mechanism 500 and damping mechanism 600 with second adjusting mechanism 300, can provide a support and damping effect to the side wall of beam body when limiting and installing, so as to improve the safety of transportation, and can improve the efficiency of installing and transporting beam body.

[0023] Refer to Figure 1 First adjusting mechanism 200 includes jack 201, adjusting plate 202, first mounting frame 203 and sliding guide rail 204, jack 201 is installed on the side wall of fixed plate 102, the output end of jack 201 is connected with the side wall of adjusting plate 202, first mounting frame 203 is equipped on transport vehicle body 101, sliding guide rail 204 is equipped on first mounting frame 203, and the end close to sliding guide rail 204 of adjusting plate 202 is slidably connected with first mounting frame 203.

[0024] Jack 201 is started to drive adjusting plate 202 to slide on sliding guide rail 204, and the cooperation of sliding guide rail 204 and limit plate 103 can realize the limitation of beam body in front and back, and can adapt to beam body of different lengths.

[0025] Refer to Figures 2-3 Second adjusting mechanism 300 includes driving motor 301, bidirectional screw rod 302, second mounting frame 303 and adjusting block 304, second mounting frame 303 is installed between limit plate 103 and first mounting frame 203 on transport vehicle body 101, driving motor 301 is installed on transport vehicle body 101, the output end of driving motor 301 is connected with bidirectional screw rod 302, the other end of bidirectional screw rod 302 penetrates the side wall of second mounting frame 303, the two ends of bidirectional screw rod 302 are equipped with opposite threads, adjusting block 304 is symmetrically slidably arranged on the side wall of second mounting frame 303, the lower end of adjusting block 304 is slidably connected with first mounting frame 203, the thread in adjusting block 304 is matched with first mounting frame 203, and connecting mechanism 400 is symmetrically arranged on transport vehicle body 101.

[0026] The driving motor 301 drives the bidirectional screw rod 302 to rotate, and the bidirectional screw rod 302 rotates and cooperates with the adjusting block 304 to realize the relative or opposite movement of the adjusting block 304 on the second mounting frame 303, so as to adapt to beams of different widths.

[0027] With reference to Figures 2-3 The connecting mechanism 400 comprises a first bevel gear 401, a second bevel gear 402, a rotating shaft 403, a support sleeve ring 404 and a fixing frame 405, the fixing frame 405 is symmetrically arranged on the side wall of the transport vehicle body 101, the support sleeve ring 404 is arranged on the fixing frame 405, one end of the rotating shaft 403 is rotatably connected with the side wall of the fixing frame 405, the other end of the rotating shaft 403 penetrates through the support sleeve ring 404 and is connected with the second bevel gear 402, the second bevel gear 402 is engaged with the first bevel gear 401, the first bevel gear 401 is arranged at two ends of the bidirectional screw rod 302, and the transport vehicle body 101 is symmetrically provided with a supporting mechanism 500 and a damping mechanism 600 away from the first adjusting mechanism 200.

[0028] The bidirectional screw rod 302 drives the first bevel gear 401 to rotate, the first bevel gear 401 drives the second bevel gear 402 to rotate, the second bevel gear 402 drives the rotating shaft 403 to rotate, and the rotating shaft 403 drives the pinion 502 and the gear 601 to rotate.

[0029] With reference to Figures 2-5 The supporting mechanism 500 comprises a large gear 501, a pinion 502, a mounting shaft plate 503, a bearing plate 504, a support arm 505, a support frame 506, an adjusting arm 507, a connecting arm 508, a receiving frame 509, rubber balls 510 and mounting discs 511, the mounting discs 511 are symmetrically arranged on the transport vehicle body 101, the mounting shaft plate 503 is arranged at one end of the side wall of the mounting disc 511, the support frame 506 is arranged at the other end of the side wall of the mounting disc 511, one end of the bearing plate 504 is rotatably arranged on the side wall of the mounting shaft plate 503, the other end of the bearing plate 504 penetrates through the side wall of the mounting shaft plate 503 and is connected with the large gear 501, the large gear 501 is engaged with the pinion 502, the pinion 502 is arranged on the outer wall of the rotating shaft 403, the support arm 505 is arranged on the side wall of the support frame 506, one end of the adjusting arm 507 is rotatably connected with one end of the mounting shaft plate 503, the other end of the adjusting arm 507 is rotatably connected with the connecting arm 508, the connecting arm 508 is rotatably arranged on the side wall of the support arm 505 close to one end of the adjusting arm 507, the receiving frame 509 is arranged at the end of the connecting arm 508 away from the adjusting arm 507, and the receiving frame 509 rotatably comprises a plurality of rubber balls 510.

[0030] The small gear 502 rotates to drive the large gear 501 to rotate, the large gear 501 rotates to drive the bearing plate 504 to rotate, the bearing plate 504 drives the adjusting arm 507 to pull the connecting arm 508 to rotate, the connecting arm 508 drives the supporting frame 509 and the rubber ball 510 to move to the appropriate position, since the rubber ball 510 is made of elastic material, so during the movement adjustment, the problem of excessive abutment force and damage to the parts and the beam body will not occur, and a damping and supporting effect is achieved, the rubber ball 510 and the beam body have friction, which can avoid the sliding phenomenon of the beam body during transportation.

[0031] With reference to Figures 2-4 : The damping mechanism 600 comprises a gear 601, a rack 602, a mounting column 603, a sliding plate 604, a sliding block 605, a first sleeve 606, a sliding rod 607, a second sleeve 608, an abutting rod 609, a damping spring 610, a connecting plate 611, a support shaft plate 612, a semicircular shaft 613, a semicircular sliding sleeve 614 and a rubber abutting plate 615, the mounting disc 511 on the transport vehicle body 101 is provided with mounting columns 603 on both sides, the mounting columns 603 are provided with sliding plates 604, the sliding plates 604 are provided with sliding blocks 605 on the side walls, the sliding plates 604 are provided with racks 602 on the side walls near one end of the rotating shaft 403, the racks 602 are engaged with the gears 601, the gears 601 are arranged on the outer wall of the rotating shaft 403, the racks 602 are arranged on the side walls of the sliding plates 604, the sliding plates 604 are slidingly arranged on the mounting columns 603, the sliding plates 604 are provided with sliding blocks 605 on the side walls, the sliding blocks 605 are provided with a plurality of first sleeves 606 symmetrically arranged thereon, the first sleeves 606 are provided with sliding rods 607 slidingly arranged therein, the first sleeves 606 on the sliding blocks 605 are provided with a plurality of second sleeves 608 arranged therebetween, the second sleeves 608 are provided with abutting rods 609 slidingly arranged therein, the abutting rods 609 and the sliding rods 607 are provided with connecting plates 611 connected to the upper ends, the damping springs 610 are connected to the side walls of the connecting plates 611 and the side walls of the second sleeves 608, the connecting plates 611 are provided with support shaft plates 612 symmetrically arranged on the top walls, the support shaft plates 612 are provided with semicircular shafts 613 arranged therebetween, the semicircular shafts 613 are provided with semicircular sliding sleeves 614 slidingly arranged thereon, and the semicircular sliding sleeves 614 are provided with rubber abutting plates 615 arranged away from one end of the connecting plates 611.

[0032] The gear 601 rotates to drive the rack 602 to move up and down, the rack 602 drives the sliding plate 604 to move up and down, the sliding plate 604 drives the sliding block 605 to move up and down, the sliding block 605 drives the first sleeve 606 and the second sleeve 608 to move up and down, and since the upper end of the beam body is at an inclined angle, when the rubber stop plate 615 is in contact with the side wall of the beam body, the sliding block 605, the first sleeve 606 and the second sleeve 608 continue to move up at this time, and the contact force between the rubber stop plate 615 and the beam body increases, driving the semicircular sliding sleeve 614 to slide on the semicircular shaft 613, and at this time the rubber stop plate 615 will eventually maintain a parallel state of contact with the inclined beam body, and the damping spring 610 can generate a damping force on it.

[0033] Working principle:

[0034] S1, the beam body is placed on the transport vehicle body 101 through a lifting tool, the jack 201 is started to drive the adjusting plate 202 to slide on the sliding guide rail 204, and the sliding guide rail 204 and the limiting plate 103 cooperate to limit the beam body in front and back, and beams of different lengths can be adapted;

[0035] S2, the driving motor 301 is started to drive the bidirectional screw rod 302 to rotate, the bidirectional screw rod 302 rotates and cooperates with the adjusting block 304 to realize the relative or opposite movement of the adjusting block 304 on the second mounting frame 303, so that beams of different widths can be adapted;

[0036] S3, the bidirectional screw rod 302 rotates to drive the first bevel gear 401 to rotate, the first bevel gear 401 rotates to drive the second bevel gear 402 to rotate, the second bevel gear 402 rotates to drive the rotating shaft 403 to rotate, the rotating shaft 403 rotates to drive the pinion 502 and the gear 601 to rotate, the pinion 502 rotates to drive the gear 501 to rotate, the gear 501 rotates to drive the bearing plate 504 to rotate, the bearing plate 504 drives the adjusting arm 507 to pull the connecting arm 508 to rotate, the connecting arm 508 drives the receiving frame 509 and the rubber ball 510 to move to the appropriate position, since the rubber ball 510 is of elastic material, the problem of excessive force of abutment and damage to parts and the beam body will not occur during movement and adjustment, and a damping and supporting effect is achieved, and the rubber ball 510 and the beam body have friction, so that the phenomenon of sliding of the beam body during transportation can be avoided;

[0037] S4, the gear 601 rotates to drive the rack 602 to move up and down, the rack 602 drives the sliding plate 604 to move up and down, the sliding plate 604 drives the sliding block 605 to move up and down, the sliding block 605 drives the first sleeve 606 and the second sleeve 608 to move up and down, since the upper end of the beam body is at an inclined angle, when the rubber stop plate 615 is in contact with the side wall of the beam body, at this time the sliding block 605, the first sleeve 606 and the second sleeve 608 continue to move up, at this time the contact force between the rubber stop plate 615 and the beam body increases, driving the semicircular sliding sleeve 614 to slide on the semicircular shaft 613, at this time the rubber stop plate 615 will eventually maintain a parallel state in contact with the inclined beam body, and the damping spring 610 can generate a damping force on it.

[0038] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A multi-functional adjustable span beam transport vehicle, characterized by, Including the transport car body (101), the fixed plate (102) is installed on the transport car body (101), the limit plate (103) is installed on the transport car body (101) away from the fixed plate (102) one end, the first adjusting mechanism (200) is equipped on the fixed plate (102), the second adjusting mechanism (300) is equipped between the limit plate (103) and the first adjusting mechanism (200).

2. The multi-functional adjustable span beam transport vehicle according to claim 1, wherein, The first adjusting mechanism (200) includes a jack (201), an adjusting plate (202), a first mounting frame (203) and a sliding guide rail (204), the jack (201) is installed on the side wall of the fixed plate (102), the output end of the jack (201) is connected with the side wall of the adjusting plate (202), the first mounting frame (203) is arranged on the transport car body (101), the sliding guide rail (204) is arranged on the first mounting frame (203), and the adjusting plate (202) is slidably connected with the first mounting frame (203) at one end close to the sliding guide rail (204).

3. The multi-functional adjustable span beam transport vehicle according to claim 1, wherein, The second adjusting mechanism (300) includes a driving motor (301), a bidirectional screw rod (302), a second mounting frame (303) and an adjusting block (304), the second mounting frame (303) is installed between the limit plate (103) and the first mounting frame (203) on the transport car body (101), the driving motor (301) is installed on the transport car body (101), the output end of the driving motor (301) is connected with the bidirectional screw rod (302), the other end of the bidirectional screw rod (302) penetrates through the side wall of the second mounting frame (303), the two ends of the bidirectional screw rod (302) are provided with opposite threads, the adjusting block (304) is symmetrically and slidably arranged on the side wall of the second mounting frame (303), the lower end of the adjusting block (304) is slidably connected with the first mounting frame (203), the adjusting block (304) is internally provided with threads matched with the first mounting frame (203), and the connecting mechanism (400) is symmetrically arranged on the transport car body (101).

4. The multi-functional adjustable span beam transport vehicle according to claim 3, wherein, The connecting mechanism (400) includes a first bevel gear (401), a second bevel gear (402), a rotating shaft (403), a support sleeve ring (404) and a fixed frame (405), the fixed frame (405) is symmetrically arranged on the side wall of the transport car body (101), the support sleeve ring (404) is installed on the fixed frame (405), one end of the rotating shaft (403) is rotatably connected with the side wall of the fixed frame (405), the other end of the rotating shaft (403) penetrates through the support sleeve ring (404) and is connected with the second bevel gear (402), the second bevel gear (402) is meshed with the first bevel gear (401), the first bevel gear (401) is installed at the two ends of the bidirectional screw rod (302), and the support mechanism (500) and the damping mechanism (600) are symmetrically arranged on the transport car body (101) away from the first adjusting mechanism (200).

5. The multi-functional adjustable span beam transport vehicle according to claim 4, wherein, Said supporting mechanism (500) including gear (501), pinion (502), mounting shaft plate (503), bearing plate (504), support arm (505), support frame (506), adjusting arm (507), connecting arm (508), receiving frame (509), rubber ball (510) and mounting disc (511), the transport vehicle body (101) symmetry installation has mounting disc (511), one end side wall of mounting disc (511) is installed with mounting shaft plate (503), the other end side wall of mounting disc (511) is installed with support frame (506), one end of bearing plate (504) is rotatably arranged on the side wall of mounting shaft plate (503), the other end of bearing plate (504) passes through the side wall of mounting shaft plate (503) and is connected with gear (501), gear (501) is engaged with pinion (502), pinion (502) is arranged on the outer wall of rotating shaft (403), support frame (506) side wall is installed with support arm (505), one end of adjusting arm (507) is rotatably connected with one end of mounting shaft plate (503), the other end of adjusting arm (507) is rotatably connected with connecting arm (508), connecting arm (508) is rotatably arranged on the side wall of support arm (505) near one end of adjusting arm (507), receiving frame (509) is installed on the other end of connecting arm (508) away from adjusting arm (507), a plurality of rubber balls (510) are rotatably installed on receiving frame (509).

6. The multi-functional adjustable span beam transport vehicle according to claim 4, wherein, The damping mechanism (600) comprises a gear (601), a rack (602), a mounting column (603), a sliding plate (604), a sliding block (605), a first sleeve (606), a sliding rod (607), a second sleeve (608), an abutting rod (609), a damping spring (610), a connecting plate (611), a support shaft plate (612), a semicircular shaft (613), a semicircular sliding sleeve (614) and a rubber abutting plate (615), both sides of the mounting disc (511) on the transport vehicle body (101) are provided with mounting columns (603), the mounting columns (603) are slidably provided with sliding plates (604), the sliding plates (604) are provided on the side walls and are provided with sliding blocks (605), the sliding plates (604) are provided on the side walls near one end of the rotating shaft (403) and are provided with racks (602), the racks (602) are engaged with gears (601), the gears (601) are arranged on the outer walls of the rotating shaft (403), the racks (602) are arranged on the side walls of the sliding plates (604), the sliding plates (604) are slidably arranged on the mounting columns (603), the sliding plates (604) are provided on the side walls and are provided with sliding blocks (605), the sliding blocks (605) are symmetrically provided with a plurality of first sleeves (606), the first sleeves (606) are slidably provided with sliding rods (607), the first sleeves (606) on the sliding blocks (605) are provided with a plurality of second sleeves (608), the second sleeves (608) are slidably provided with abutting rods (609), the abutting rods (609) and the sliding rods (607) are connected with connecting plates (611) at the upper ends, the damping springs (610) are connected with the side walls of the connecting plates (611) and the side walls of the second sleeves (608) at both ends, the connecting plates (611) are symmetrically provided with support shaft plates (612) on the top walls, the support shaft plates (612) are provided with semicircular shafts (613), the semicircular shafts (613) are slidably provided with semicircular sliding sleeves (614), and the semicircular sliding sleeves (614) are provided with rubber abutting plates (615) away from the connecting plates (611).

Images