Unmanned transport vehicle for construction site

Abstract

The invention discloses an unmanned transport vehicle for a construction site, and relates to the field of transportation, the unmanned transport vehicle comprises a vehicle body, a bearing frame is mounted on the outer side wall of the vehicle body, a hydraulic cylinder is fixedly connected to the outer side wall of the bearing frame, and a placing table is fixedly connected to the top of the bearing frame and used for placing a hollow steel pipe; the positioning mechanism comprises a first positioning piece fixedly connected to the output end of the hydraulic cylinder and a second positioning piece fixedly connected to the outer side wall of the bearing frame. According to the unmanned transport vehicle for the construction site, the hollow steel pipe is preliminarily positioned through the positioning mechanism, the central axis of the hollow steel pipe coincides with the central axis of the lead screw, and then the driving motor drives the movable base to move through the lead screw till the outer side wall of the baffle abuts against the end face of the hollow steel pipe; and meanwhile, the electric push rod is synchronously started, so that the electric push rod abuts against the inner side wall of the hollow steel pipe, and internal and external double clamping is achieved.

Description

Technical Field

[0001] The invention relates to the field of transportation, and in particular to an unmanned transport vehicle for construction sites. Background Art

[0002] With the development of automatic control technology and artificial intelligence technology, driverless transport vehicles are widely used in construction site operations for logistics transportation. Steel is an indispensable material in construction site construction. During the transportation and use of steel, various cylindrical steels are often bundled and transported, or directly lifted and transported. However, this method of bundling is not firm, which can easily lead to friction and collision between steels. The collision causes the paint layer on the steel surface to peel off and rust, or causes the steel to fall, which has poor safety.

[0003] After searching the publication (announcement) number: CN108657254B, a non-slip and non-collision steel pipe transport vehicle is disclosed. The transport vehicle includes a Ferris wheel bracket, a Ferris wheel support and a roller. The Ferris wheel bracket is connected to the Ferris wheel support through a bracket connection device. The lower end of the Ferris wheel support is equipped with a roller. The Ferris wheel bracket is composed of two symmetrical cylinders with radial ribs. The ribs are provided with a plurality of steel positioning grooves. The inner wall of the steel positioning groove is coated with a magnetic non-slip coating.

[0004] Although the above solution can fix the steel pipe, the diameter of the non-standard pipe may be slightly larger or smaller than the standard size range set by the device, resulting in the pipe being unable to be stably placed inside the device, prone to shaking, shifting, etc., and the device has poor applicability. Summary of the invention

[0005] The main purpose of the present invention is to provide an unmanned transport vehicle for construction sites. By setting up a positioning mechanism, a transmission mechanism and a clamping mechanism, the problem that the diameter of non-standard pipes may be slightly larger or smaller than the standard size range set by the device, resulting in the pipes being unable to be stably placed inside the device and prone to shaking and shifting, can be solved.

[0006] To achieve the above object, the technical solution adopted by the present invention is: Unmanned transport vehicles for construction sites, including: A vehicle body, the outer side wall of the vehicle body is equipped with a load-bearing frame, the outer side wall of the load-bearing frame is fixedly connected to a hydraulic cylinder, and a placement table fixedly connected to the top of the load-bearing frame for placing a hollow steel pipe; The positioning mechanism includes a first positioning member fixedly connected to the output end of the hydraulic cylinder and a second positioning member fixedly connected to the outer side wall of the carrier frame, the first positioning member includes a first positioning unit connected to the output end of the hydraulic cylinder and a second positioning unit, the first positioning unit includes an inclined plate fixedly connected to the outer side wall of the carrier frame, a slider slidably arranged on the top of the inclined plate, and a limiting plate driven by a driving member to limit the hollow steel pipe; A transmission mechanism, the transmission mechanism comprising a laser receiver fixedly connected to the bottom of the second positioning unit for driving the second positioning member, and a laser transmitter fixedly connected to the top of the first positioning unit; The clamping mechanism includes a first clamping member fixedly connected to the output end of the hydraulic cylinder and a second clamping member fixedly connected to the outer wall of the support frame, and the central axis of the first clamping member and the second clamping member coincides with the central axis of the hollow steel pipe.

[0007] Preferably, the driving member includes a servo motor fixedly connected to the outer side wall of the slider, a receiving groove provided at the bottom of the limit plate, an electromagnet embedded in the receiving groove, a connecting spring fixedly connected to the inner side wall of the receiving groove, and a locking block fixedly connected to the end surface of the connecting spring; The output end of the servo motor is fixedly connected to the outer side wall of the limiting plate.

[0008] Preferably, the driving member also includes a locking groove provided on the top of the inclined plate and a snap-fit ​​groove provided on the outer wall of the sliding block, and the inner diameters of the snap-fit ​​groove and the locking groove are equal to the outer diameter of the locking block.

[0009] Preferably, the first positioning unit further comprises a slide slot provided at the top of the inclined plate, an end cover detachably connected to the opening of the slide slot, and a T-shaped block movably provided inside the slide slot; The bottom of the sliding block is fixedly connected to the top of the T-block.

[0010] Preferably, the first positioning unit also includes an arc-shaped limiting groove opened at the lateral end of the T-block and symmetrically distributed, and a plurality of balls movably arranged inside the arc-shaped limiting groove, the radial outer surface of the ball and the arc surface of the arc-shaped limiting groove form an enveloping contact interface, the radial constraint surface of the ball located on the vertical arm of the T-block contacts the inner side wall of the slide groove, and the two axial guide surfaces of the horizontal flange of the T-block contact the relative inner side walls of the slide groove respectively.

[0011] Preferably, the second positioning unit has the same structure as the first positioning unit, and the second positioning unit and the first positioning unit are symmetrically arranged with respect to the central axis of the clamping mechanism.

[0012] Preferably, the transmission mechanism further comprises an electric telescopic rod fixedly connected to the bottom of the inclined plate of the second positioning unit, and the electric telescopic rod is fixedly connected to the sliding block of the second positioning unit via a connecting block.

[0013] Preferably, the first clamping member includes a driving motor fixedly connected to the output end of the hydraulic cylinder, a screw fixedly connected to the output end of the driving motor, a movable seat threadedly connected to the outer side wall of the screw, an electric push rod fixedly connected to the outer side wall of the movable seat, and a baffle fixedly connected to the output end of the electric push rod.

[0014] Preferably, the second clamping member has the same structure as the first clamping member, and a driving motor of the second clamping member is fixedly connected to an outer side wall of the supporting frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by cutting off the power of the electromagnet, the locking block is partially inserted into the locking groove under the action of the connecting spring, so as to fix the limit plate and the slider, and then spray lubricating oil on the surface of the slider, and then place the hollow steel pipe in the arc groove of the placement table, and start the hydraulic cylinder until the hydraulic cylinder pushes the tilting plate to move, thereby driving the hollow steel pipe to move, until the two ends of the hollow steel pipe are respectively against the sliders of the two positioning members, and the hydraulic cylinder is still in a working state, thereby driving the hollow steel pipe to slide on the surface of the slider, until the inner and outer side walls of the bottom end of the hollow steel pipe are respectively against the limit plate and the slider.

[0016] 2. In the present invention, by energizing the electromagnet, it has magnetic force, which then adsorbs the locking block and moves it upward, so that it is separated from the locking groove and abuts against the outer surface of the limit plate. At this time, the hydraulic cylinder is started, so that its hollow steel pipe drives the slider to slide on the inclined plate.

[0017] 3. In the present invention, the laser receiver detects the light spot offset and generates a posture deviation signal of the slider of the first positioning unit relative to the slider of the second positioning unit. At this time, the electric telescopic rod is driven to correct the position in real time to achieve dynamic following of the two sliders. Because the angle between the two inclined plates of its positioning member is an acute angle, the top of the hollow steel pipe will be against the slider of the second positioning unit during the continuous movement, so as to position the hollow steel pipe, and at this time, the central axis of the hollow steel pipe coincides with the central axis of the screw rod.

[0018] 4. In the present invention, the electric power of the electromagnet is increased, so that the locking block is completely retracted into the storage groove, and then the servo motor is started to drive the limit plate to rotate until the limit plate is located at the horizontal extension line of the slider, and the storage groove opening is opposite to the engaging groove. Then the electromagnet is powered off, so that the locking block is inserted into the engaging groove, so as to fix the limit plate and prevent the limit plate from interfering with the movement of the movable seat. The drive motor is started to drive the screw rod to rotate, and then the movable seat is driven to move until the outer wall of the baffle plate is abutted against the end face of the hollow steel pipe, and then the electric push rod is started synchronously, so that the electric push rod is abutted against the inner wall of the hollow steel pipe, so as to realize internal and external double clamping, that is, the end face of the steel pipe and the inner wall, and realize high-stability fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure in the middle; Figure 3 It is a schematic diagram of the three-dimensional structure of the carrier frame of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structure viewed from above; Figure 5 This is a schematic diagram of the connection structure between the inclined plate and the slider of the present invention; Figure 6 For the present invention Figure 5 Middle B is an enlarged schematic diagram of the structure; Figure 7 This is a schematic diagram of the connection structure between the T-block and the ball bearing of the present invention; Figure 8 This is a schematic diagram of the internal structure of the limiting plate of the present invention; Fig. 9 It is a schematic diagram of the distribution structure of the engaging grooves of the present invention.

[0020] In the figure: 1. vehicle body; 2. carrier frame; 3. hydraulic cylinder; 4. placing table; 501. tilting plate; 502. slider; 503. servo motor; 504. limit plate; 505. slide groove; 5051. end cover; 506. T-block; 507. arc limit groove; 508. ball bearing; 509. electromagnet; 5010. connecting spring; 5011. locking block; 5012. engaging groove; 601. electric telescopic rod; 602. laser receiver; 603. laser transmitter; 701. driving motor; 702. lead screw; 703. movable seat; 704. electric push rod; 705. baffle. DETAILED DESCRIPTION

[0021] Embodiment 1 Please refer to Figure 1 , Figure 2 as well as Figure 5-Figure 9 As shown, the present invention is an unmanned transport vehicle for a construction site, comprising: A vehicle body 1, a load-bearing frame 2 is installed on the outer side wall of the vehicle body 1, a hydraulic cylinder 3 is fixedly connected to the outer side wall of the load-bearing frame 2, and a placement table 4 fixedly connected to the top of the load-bearing frame 2 for placing a hollow steel pipe, the placement table 4 is a rectangular block with an arc groove on the top; The positioning mechanism includes a first positioning member fixedly connected to the output end of the hydraulic cylinder 3, and a second positioning member fixedly connected to the outer wall of the carrier frame 2. The first positioning member includes a first positioning unit connected to the output end of the hydraulic cylinder 3 and a second positioning unit. The first positioning unit includes an inclined plate 501 fixedly connected to the outer wall of the carrier frame 2, a slider 502 slidably arranged on the top of the inclined plate 501, and a limiting plate 504 driven by a driving member to limit the hollow steel pipe, wherein the first positioning member and the second positioning member have the same composition structure, and the lowest point of the table surface of the placing table 4 is slightly higher than the top surface of the slider 502; A transmission mechanism, the transmission mechanism comprising a laser receiver 602 fixedly connected to the bottom of the second positioning unit for driving the second positioning member, and a laser transmitter 603 fixedly connected to the top of the first positioning unit; The clamping mechanism includes a first clamping member fixedly connected to the output end of the hydraulic cylinder 3, and a second clamping member fixedly connected to the outer wall of the carrier frame 2. The central axis of the first clamping member and the second clamping member coincides with the central axis of the hollow steel pipe.

[0022] The driving member includes a servo motor 503 fixedly connected to the outer wall of the slider 502, a receiving groove provided at the bottom of the limit plate 504, an electromagnet 509 embedded in the receiving groove, a connecting spring 5010 fixedly connected to the inner wall of the receiving groove, and a locking block 5011 fixedly connected to the end face of the connecting spring 5010; The output end of the servo motor 503 is fixedly connected to the outer wall of the limit plate 504, wherein the locking block 5011 is made of ferromagnetic material. When the electromagnet 509 is energized and has magnetic force, it will adsorb the locking block 5011 and make it completely retracted into the storage groove. At this time, the connecting spring 5010 is in a compressed state. The angle of the limit plate 504 can be adjusted by the servo motor 503 to achieve the limitation or separation of the hollow steel pipe.

[0023] The driving member also includes a locking groove provided on the top of the inclined plate 501 and a snap-fit ​​groove 5012 provided on the outer wall of the sliding block 502. The inner diameters of the snap-fit ​​groove 5012 and the locking groove are equal to the outer diameters of the locking block 5011. When the limiting plate 504 is located at the initial position, the receiving groove is opposite to the locking groove. By cutting off the power of the electromagnet 509, the locking block 5011 is partially inserted into the locking groove under the action of the connecting spring 5010, thereby fixing the limiting plate 504. When the limiting plate 504 is located at the horizontal extension line of the sliding block 502, the opening of the receiving groove is opposite to the snap-fit ​​groove 5012. The above operation is repeated to fix the limiting plate 504.

[0024] The first positioning unit further includes a slide groove 505 provided at the top of the inclined plate 501, an end cover 5051 detachably connected to the opening of the slide groove 505, and a T-shaped block 506 movably provided inside the slide groove 505; The bottom of the sliding block 502 is fixedly connected to the top of the T-block 506 , wherein the end cover 5051 is installed at the end of the sliding groove 505 in a plug-in manner.

[0025] The first positioning unit also includes an arc-shaped limiting groove 507 opened at the lateral end of the T-block 506 and symmetrically distributed, and a plurality of balls 508 movably arranged inside the arc-shaped limiting groove 507. The radial outer surface of the ball 508 forms a covering contact interface with the arc surface of the arc-shaped limiting groove 507. The radial constraint surface of the ball 508 located on the vertical arm of the T-block 506 contacts the inner side wall of the slide groove 505, and the two axial guide surfaces of the horizontal flange of the T-block 506 contact the opposite inner side walls of the slide groove 505 respectively. When the slider 502 slides, it will drive the T-block 506 to slide inside the slide groove 505. At this time, the ball 508 will roll on the inner wall of the slide groove 505, thereby limiting the movement of the slider 502 and reducing the wear on the inner wall of the slide groove 505, thereby increasing the service life of the device. The end cover 5051 is a detachable structure, which is convenient for replacing the slider 502. When the slider 502 is worn or damaged, only the slider 502 needs to be replaced instead of the entire device, thereby greatly reducing maintenance costs and downtime.

[0026] The second positioning unit has the same structure as the first positioning unit, and the second positioning unit and the first positioning unit are symmetrically arranged about the central axis of the clamping mechanism.

[0027] The transmission mechanism also includes an electric telescopic rod 601 fixedly connected to the bottom of the inclined plate 501 of the second positioning unit. The electric telescopic rod 601 is fixedly connected to the slider 502 of the second positioning unit through a connecting block. The laser transmitter 603 projects a laser beam vertically downward. The laser receiver 602 captures the light spot with a wide-angle receiving window ≥120° to form a non-contact spatial positioning reference between the sliders 502 of the two positioning units. When the slider 502 of the first positioning unit starts to move, the laser receiver 602 detects the light spot offset and generates a posture deviation signal of the slider 502 of the first positioning unit relative to the slider 502 of the second positioning unit. At this time, the electric telescopic rod 601 is driven to correct the position in real time to achieve dynamic following of the two sliders 502.

[0028] When the limit plate 504 is in the initial position and the storage groove is opposite to the locking groove, the electromagnet 509 can be powered off so that the locking block 5011 is partially inserted into the locking groove under the action of the connecting spring 5010, thereby fixing the limit plate 504 and the slider 502. Then, lubricating oil is sprayed on the surface of the slider 502, and the hollow steel pipe is placed in the arc groove of the placement table 4, and the hydraulic cylinder 3 is started until the hydraulic cylinder 3 pushes the inclined plate 501 to move, thereby driving the hollow steel pipe to move until the two ends of the hollow steel pipe are respectively against the sliders 502 of the two positioning parts. At this time, the hydraulic cylinder 3 is still in a working state, thereby driving the hollow steel pipe to slide on the surface of the slider 502 until the inner and outer walls of the bottom end of the hollow steel pipe are respectively against the limit plate 504 and the slider 502.

[0029] By energizing the electromagnet 509 to give it magnetic force, the locking block 5011 is attracted and moved upward to disengage from the locking groove and to abut against the outer surface of the limit plate 504. At this time, the hydraulic cylinder 3 is started so that its hollow steel tube drives the slider 502 to slide on the inclined plate 501. During this process, the laser receiver 602 detects the light spot offset and generates a posture deviation signal of the slider 502 of the first positioning unit relative to the slider 502 of the second positioning unit. At this time, the electric telescopic rod 601 is driven to correct the position in real time to achieve dynamic following of the two sliders 502. Because the angle between the two inclined plates 501 of its positioning member is an acute angle, the top of the hollow steel tube will abut against the slider 502 of the second positioning unit during the continuous movement, so as to position the hollow steel tube. At this time, the central axis of the hollow steel tube coincides with the central axis of the screw rod 702.

[0030] Embodiment 2 Please refer to Figure 1-Figure 4 As shown, the present invention is an unmanned transport vehicle for a construction site, comprising: A vehicle body 1, a load-bearing frame 2 is installed on the outer side wall of the vehicle body 1, a hydraulic cylinder 3 is fixedly connected to the outer side wall of the load-bearing frame 2, and a placement table 4 fixedly connected to the top of the load-bearing frame 2 for placing a hollow steel pipe, the placement table 4 is a rectangular block with an arc groove on the top; The positioning mechanism includes a first positioning member fixedly connected to the output end of the hydraulic cylinder 3 and a second positioning member fixedly connected to the outer wall of the carrier frame 2. The first positioning member includes a first positioning unit connected to the output end of the hydraulic cylinder 3 and a second positioning unit. The first positioning unit includes an inclined plate 501 fixedly connected to the outer wall of the carrier frame 2, a slider 502 slidably arranged on the top of the inclined plate 501, and a limiting plate 504 driven by a driving member to limit the hollow steel pipe. The lowest point of the table surface of the placing table 4 is slightly higher than the top surface of the slider 502. A transmission mechanism, the transmission mechanism comprising a laser receiver 602 fixedly connected to the bottom of the second positioning unit for driving the second positioning member, and a laser transmitter 603 fixedly connected to the top of the first positioning unit; The clamping mechanism includes a first clamping member fixedly connected to the output end of the hydraulic cylinder 3, and a second clamping member fixedly connected to the outer wall of the carrier frame 2. The central axis of the first clamping member and the second clamping member coincides with the central axis of the hollow steel pipe.

[0031] The first clamping member includes a driving motor 701 fixedly connected to the output end of the hydraulic cylinder 3, a screw rod 702 fixedly connected to the output end of the driving motor 701, a movable seat 703 threadedly connected to the outer side wall of the screw rod 702, an electric push rod 704 fixedly connected to the outer side wall of the movable seat 703, and a baffle 705 fixedly connected to the output end of the electric push rod 704, wherein the baffle 705 is a right-angle block, and the integral structure composed of the electric push rod 704 and the baffle 705 is symmetrically arranged on the opposite side walls of the movable seat 703.

[0032] The second clamping member has the same composition structure as the first clamping member. The driving motor 701 of the second clamping member is fixedly connected to the outer wall of the supporting frame 2. The driving motor 701 drives the screw rod 702 to rotate, and then drives the movable seat 703 to move until the outer wall of the baffle 705 is abutted against the end face of the hollow steel pipe. Then, the electric push rod 704 is started synchronously, and then the electric push rod 704 is abutted against the inner wall of the hollow steel pipe to fix the hollow steel pipe.

[0033] When the hollow steel pipe is fixed, the power of the electromagnet 509 is increased to completely retract the locking block 5011 into the storage groove, and then the servo motor 503 is started to drive the limit plate 504 to rotate until the limit plate 504 is located at the horizontal extension line of the slider 502, and the storage groove opening is opposite to the locking groove 5012, and then the electromagnet 509 is powered off, so that the locking block 5011 is inserted into the locking groove 5012, so as to fix the limit plate 504 and prevent the limit plate 504 from interfering with the movement of the movable seat 703, and start the drive motor 701 to drive the screw rod 702 to rotate, thereby driving the movable seat 703 to move until the outer wall of the baffle 705 is in contact with the end face of the hollow steel pipe, and then the electric push rod 704 is started synchronously, so that the electric push rod 704 is in contact with the inner wall of the hollow steel pipe, so as to realize internal and external double clamping, that is, the end face of the steel pipe and the inner wall, and achieve high stability fixation.

Claims

1. An unmanned transport vehicle for a construction site, characterized in that: include: A vehicle body (1), a bearing frame (2) being installed on the outer side wall of the vehicle body (1), a hydraulic cylinder (3) being fixedly connected to the outer side wall of the bearing frame (2), and a placement table (4) fixedly connected to the top of the bearing frame (2) for placing a hollow steel pipe; A positioning mechanism, the positioning mechanism comprising a first positioning member fixedly connected to an output end of the hydraulic cylinder (3), and a second positioning member fixedly connected to an outer side wall of the support frame (2), the first positioning member comprising a first positioning unit connected to the output end of the hydraulic cylinder (3) and a second positioning unit, the first positioning unit comprising an inclined plate (501) fixedly connected to the outer side wall of the support frame (2), a sliding block (502) slidably arranged on the top of the inclined plate (501), and a limiting plate (504) driven by a driving member for limiting the position of the hollow steel pipe; A transmission mechanism, the transmission mechanism comprising a laser receiver (602) fixedly connected to the bottom of the second positioning unit for driving the second positioning member, and a laser transmitter (603) fixedly connected to the top of the first positioning unit; The clamping mechanism comprises a first clamping member fixedly connected to the output end of the hydraulic cylinder (3), and a second clamping member fixedly connected to the outer side wall of the support frame (2), wherein the central axis of the first clamping member and the second clamping member coincides with the central axis of the hollow steel pipe.

2. The unmanned transport vehicle for construction sites according to claim 1, characterized in that: The driving member comprises a servo motor (503) fixedly connected to the outer wall of the slider (502), a storage groove provided at the bottom of the limit plate (504), an electromagnet (509) embedded in the storage groove, a connecting spring (5010) fixedly connected to the inner wall of the storage groove, and a locking block (5011) fixedly connected to the end surface of the connecting spring (5010); The output end of the servo motor (503) is fixedly connected to the outer side wall of the limiting plate (504).

3. The unmanned transport vehicle for construction sites according to claim 2, characterized in that: The driving member further comprises a locking groove formed on the top of the inclined plate (501) and a snap-fit ​​groove (5012) formed on the outer side wall of the sliding block (502); the inner diameters of the snap-fit ​​groove (5012) and the locking groove are both equal to the outer diameter of the locking block (5011).

4. The unmanned transport vehicle for construction sites according to claim 3, characterized in that: The first positioning unit further comprises a slide groove (505) provided at the top of the inclined plate (501), an end cover (5051) detachably connected to the opening of the slide groove (505), and a T-shaped block (506) movably arranged inside the slide groove (505); The bottom of the sliding block (502) is fixedly connected to the top of the T-block (506).

5. The unmanned transport vehicle for construction sites according to claim 4, characterized in that: The first positioning unit further comprises an arc-shaped limiting groove (507) which is opened at the lateral end of the T-block (506) and is symmetrically distributed, and a plurality of balls (508) which are movably arranged inside the arc-shaped limiting groove (507), wherein the radial outer surface of the balls (508) forms an enveloping contact interface with the arc surface of the arc-shaped limiting groove (507), the radial constraint surface of the balls (508) located on the vertical arm of the T-block (506) contacts the inner side wall of the slide groove (505), and the two axial guide surfaces of the horizontal flange of the T-block (506) respectively contact the opposite inner side walls of the slide groove (505).

6. The unmanned transport vehicle for construction sites according to claim 5, characterized in that: The second positioning unit has the same structure as the first positioning unit, and the second positioning unit and the first positioning unit are symmetrically arranged with respect to the central axis of the clamping mechanism.

7. The unmanned transport vehicle for construction sites according to claim 6, characterized in that: The transmission mechanism further comprises an electric telescopic rod (601) fixedly connected to the bottom of the inclined plate (501) of the second positioning unit, and the electric telescopic rod (601) is fixedly connected to the sliding block (502) of the second positioning unit via a connecting block.

8. The unmanned transport vehicle for construction sites according to claim 7, characterized in that: The first clamping member comprises a driving motor (701) fixedly connected to the output end of the hydraulic cylinder (3), a screw rod (702) fixedly connected to the output end of the driving motor (701), a movable seat (703) threadedly connected to the outer side wall of the screw rod (702), an electric push rod (704) fixedly connected to the outer side wall of the movable seat (703), and a baffle (705) fixedly connected to the output end of the electric push rod (704).

9. The unmanned transport vehicle for construction sites according to claim 8, characterized in that: The second clamping member has the same structural component as the first clamping member, and the driving motor (701) of the second clamping member is fixedly connected to the outer side wall of the supporting frame (2).

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