Crawler-type gantry crane

Abstract

The utility model belongs to the technical field of gantry cranes, and particularly relates to a crawler-type gantry crane which comprises two stand columns, a crawler belt supporting mechanism is arranged below each stand column, each crawler belt supporting mechanism comprises a box body, a power mechanism and a crawler belt, the box bodies are rotationally arranged below the stand columns, transmission wheels are rotationally arranged at the two ends in the box bodies, and the crawler belts are wound on the two transmission wheels; a supporting block is arranged on the stand column, limiting mechanisms are arranged on the two sides of the supporting block, each limiting mechanism comprises two rotating plates, the upper ends of the rotating plates are rotationally connected with the supporting block, an air cylinder is arranged between the two rotating plates of one limiting mechanism, and the two ends of the air cylinder are hinged to the rotating plates; and a connecting column is rotationally arranged between the two rotating plates which are symmetrical about the box body. According to the gantry crane, the crawler belt supporting mechanisms are matched with the crawler belts to achieve movement of the gantry crane, only one crawler belt supporting mechanism moves to achieve in-situ rotation of the gantry crane around the stand column corresponding to the other crawler belt supporting mechanism, and small-range movement of the gantry crane is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gantry cranes, and in particular relates to a crawler type gantry crane. Background Art

[0002] Gantry crane is a variation of bridge crane, also called gantry crane. Its metal structure is like a door-shaped frame. Two legs are installed under the load-bearing main beam. It can run directly on the ground track. Both ends of the main beam can have outward cantilever beams. It has the characteristics of high site utilization, large operating range, wide adaptability, strong versatility, etc., and is widely used in port cargo yards.

[0003] However, the setting of the track imposes great restrictions on the movement of the gantry crane, and the gantry crane cannot be flexibly moved in the application site according to specific needs. Therefore, some gantry cranes that are driven and moved by crawler chassis have appeared, which expands the use site of the gantry crane, facilitates flexible movement, and realizes the convenience of moving on some uneven roads, such as gravel roads. However, the current crawler gantry cranes mostly fix the gantry crane on a crawler mobile trolley structure, which facilitates the flexible movement of the gantry crane and the convenience of movement on uneven roads, but is very inconvenient for small-range position adjustment of the gantry crane. Summary of the invention

[0004] The utility model aims to solve the problem that the existing crawler gantry crane is not convenient to move the gantry crane in a small range when moving. The utility model provides a crawler gantry crane, which limits the crawler support mechanism through a limiting mechanism to ensure that when the gantry crane moves in a straight line, there is no relative rotation between the crawler support mechanism and the gantry crane column, and when the limiting mechanism for the box body is cancelled, the gantry crane can be rotated in situ around the corresponding column of the other crawler support mechanism by moving only one crawler support mechanism, thereby realizing the small range movement of the gantry crane.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A crawler type gantry crane comprises two columns, a cross beam is fixedly arranged above the two columns, a lifting mechanism is arranged on the cross beam, a crawler support mechanism is arranged under each of the columns, the crawler support mechanism comprises a box body with an opening at the lower end, a power mechanism and a crawler track, the box body is rotatably arranged under the columns, transmission wheels are rotatably arranged at both ends of the box body, the lower end of the transmission wheel extends out of the box body, the crawler track is wound around two transmission wheels, a power mechanism is arranged outside the box body, which is used to drive the transmission wheel to rotate, and the rotation of the transmission wheel drives the crawler track to rotate, thereby driving the crawler support mechanism to move on the road surface, when the moving speeds of the two crawler support structures are the same, the gantry crane moves in a straight line, and when the moving speeds of the two crawler support structures are different, the gantry crane realizes steering.

[0007] A support block is fixedly arranged on each of the columns, and a limiting mechanism is arranged on both sides of the support block. The limiting mechanism is symmetrically arranged with respect to the box body, and the limiting mechanism comprises two rotating plates. The upper ends of the two rotating plates are rotatably arranged at the two ends on the same side of the support block. The cross-section of the rotating plate is trapezoidal, and the side of the rotating plate corresponding to the upper bottom of the trapezoidal cross-section contacts the side of the box body. A cylinder is arranged between the two rotating plates corresponding to one of the limiting mechanisms, and the two ends of the cylinder are hinged to the two rotating plates respectively; a connecting column is rotatably connected between the two rotating plates symmetrically arranged with respect to the box body, and each box body corresponds to four rotating plates, and the four rotating plates cooperate to realize the movement and guiding of the box body, and the rotating plates can be driven to open by the cylinder to avoid the rotating plates from contacting the box body, and the limitation of the box body by the limiting mechanism is released, so that the gantry crane can be conveniently rotated around one of the columns, and the gantry crane can be flexibly moved in a small range.

[0008] Preferably, the power mechanism includes a motor and a reducer, the motor and the reducer are fixedly arranged on the side of the box, the output end of the motor is connected to the reducer, and the output end of the reducer passes through the side wall of the box and is fixedly connected to one of the transmission wheels. The transmission wheel speed is adjusted by cooperating with the motor and the reducer, thereby achieving the adjustment of the moving speed of the crawler support structure.

[0009] Preferably, each of the columns is provided with an annular groove, a cylinder is rotatably arranged in the annular groove, a support rod is fixedly arranged between the cylinder and the top of the box body, and the two support rods are symmetrical about the columns. The support rods ensure the stability of the gantry crane when lifting heavy objects and moving them.

[0010] Preferably, a sleeve is fixedly arranged on the top of the box body, and the lower end of the column is rotatably arranged in the sleeve, so as to realize the rotational connection between the column and the box body.

[0011] Preferably, a tightening mechanism is provided in the box body, and the tightening mechanism comprises a tightening wheel, which is rotatably provided in the box body and whose outer side contacts the lower side of the upper belt of the crawler track, and the crawler track is tightened by the tightening wheel.

[0012] Through the above technical solution, the beneficial effects of the utility model are:

[0013] 1. The utility model realizes the support of two columns of the gantry crane through two crawler support mechanisms, and realizes the movement of the crawler support mechanisms by driving the crawler tracks to rotate through a power mechanism. When the moving speeds of the two crawler support mechanisms are consistent, the gantry crane moves in a straight line. When the moving speeds of the two crawler support mechanisms are inconsistent, the gantry crane turns, thereby making the working range of the gantry crane not limited to the track, which is convenient for lifting heavy objects at different positions.

[0014] 2. The utility model connects the column with the box body through rotation. When one of the crawler support mechanisms does not move and the other crawler support mechanism moves, the gantry crane rotates around the column corresponding to the fixed crawler support mechanism, thereby realizing a small-range steering movement of the gantry crane. Compared with simply setting the gantry crane on the crawler chassis structure, the efficiency of the gantry crane in rotating on the spot or moving in a small range is effectively improved.

[0015] 3. The utility model sets a limit mechanism and multiple turn plates to limit the relative rotation of the box and the column. When the gantry crane moves in a straight line, the limit of the turn plates on the box can prevent the two crawler support mechanisms from rotating in different directions due to uneven road surface, which will cause the gantry crane to be pulled during the movement and cause damage to the gantry crane or the crawler support mechanisms.

[0016] 4. The utility model rotatably sets a connecting column between two rotating plates symmetrically arranged about the box body, thereby facilitating the driving of the rotating plate corresponding to the same column by a cylinder, thereby realizing the control of the rotating plate to fit the side of the box body or to move away from the box body, thereby realizing the functional switching of the gantry crane moving or rotating on the spot. When the rotating plate rotates away from the box body, the limiting mechanism does not affect the relative rotation of the column and the crawler support mechanism.

[0017] 5. The utility model sets the turning plate as a plate body with a trapezoidal cross-section, and the side surface of the turning plate corresponding to the upper bottom of the trapezoidal cross-section contacts the side surface of the box body. When the gantry crane moves linearly, as the end of the turning plate rotates toward the direction of the box body, the direction of the box body is corrected under the action of the inclined surface of the trapezoidal turn plate to ensure that the extension directions of the two boxes are parallel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 The structure diagram of the limit mechanism and crawler support structure of the utility model is shown in FIG. Figure 1 .

[0020] Figure 3 The structure diagram of the limit mechanism and crawler support structure of the utility model is shown in FIG. Figure 2 .

[0021] Figure 4 It is a structural schematic diagram of the column and the limiting structure of the utility model.

[0022] Figure 5 The structure of the utility model is shown in FIG. Figure 1 .

[0023] Figure 6 The structure of the utility model is shown in FIG. Figure 2 .

[0024] Figure 7 It is a structural schematic diagram of the tension wheel of the utility model.

[0025] The numbers in the accompanying drawings are: 1 is a column, 2 is a beam, 3 is a box, 4 is a crawler, 5 is a support block, 6 is a rotating plate, 7 is a cylinder, 8 is a connecting column, 9 is a motor, 10 is a reducer, 11 is an annular groove, 12 is a cylinder, 13 is a support rod, 14 is a sleeve, 15 is a tension wheel, 16 is a bolt, and 17 is a strip hole. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0027] like Figure 1 to Figure 7 As shown, this embodiment provides a crawler gantry crane, including two columns 1, a crossbeam 2 is fixedly arranged above the two columns 1, a lifting mechanism is arranged on the crossbeam 2, and the lifting mechanism is a winch, which is slidably arranged on the crossbeam 2. A track can be arranged on the crossbeam 2, and a moving trolley is arranged on the track. The trolley is powered by a motor and a reducer. The winch is arranged on the trolley for lifting heavy objects. Correspondingly, the transport mechanism can also be an electric hoist or other existing technology that can lift heavy objects.

[0028] A crawler support mechanism is arranged under each of the columns 1, and the crawler support mechanism includes a box 3 with an opening at the lower end, a power mechanism, and a crawler 4. The box 3 is rotatably arranged under the column 1, and a sleeve 14 is fixedly arranged on the top of the box 3. The lower end of the column 1 is rotatably arranged in the sleeve 14, and the column 1 and the sleeve 14 can be rotatably connected through a bearing.

[0029] Transmission wheels are rotatably arranged at both ends of the box body 3, and the lower ends of the transmission wheels extend out of the box body 3. The crawler tracks 4 are wound around the two transmission wheels. The rotation of the transmission wheels drives the crawler tracks 4 to rotate, thereby realizing the movement of the crawler support mechanism. A power mechanism is arranged outside the box body 3 for driving the transmission wheels to rotate. The power mechanism includes a motor 9 and a reducer 10. The motor 9 and the reducer 10 are fixedly arranged on the side of the box body 3. The output end of the motor 9 is connected to the reducer 10, and the output end of the reducer 10 passes through the side wall of the box body 3 and is fixedly connected to one of the transmission wheels. The motor 9 and the reducer 10 provide power for the rotation of the transmission wheels to realize the movement of the crawler support mechanism, and then the movement of the gantry crane is realized through the movement of the two crawler support mechanisms. When the output rotation speeds of the two power mechanisms are the same, the moving speeds of the two crawler support mechanisms are the same, and the gantry crane moves in a straight line. When the output rotation speeds of the two power mechanisms are different, the moving speeds of the two crawler support mechanisms are different, and the gantry crane realizes steering.

[0030] When the gantry crane needs to turn in a small range to achieve a small range of movement of the lifting position, one of the power mechanisms stops outputting power and the other power mechanism starts working, and then the gantry crane rotates around the column 1 corresponding to the power mechanism that does not output power.

[0031] A support block 5 is fixedly set on each of the columns 1, and limiting mechanisms are set on both sides of the support block 5. The limiting mechanisms are symmetrically arranged with respect to the box body 3. The limiting mechanisms include two rotating plates 6. The upper ends of the two rotating plates 6 are rotatably arranged at the two ends of the same side of the support block 5. A total of four rotating plates 6 of the two limiting mechanisms are respectively arranged on both sides of the box body 3. When the lower ends of the rotating plates 6 contact the side surfaces of the box body 3, under the limiting action of multiple rotating plates 6, the box body 3 and the corresponding columns 1 cannot achieve relative rotation, thereby ensuring that when the gantry crane moves in a straight line, the crawler 4 is prevented from rotating to both sides due to uneven road surface and the like, which causes the two columns 1 of the gantry crane to be pulled to both sides, causing damage to the gantry crane equipment.

[0032] The rotating plate 6 has a trapezoidal cross section and the side of the rotating plate 6 corresponding to the upper bottom of the trapezoidal cross section contacts the side of the box body 3. A cylinder 7 is arranged between two rotating plates 6 corresponding to one of the limiting mechanisms. The two ends of the cylinder 7 are respectively hinged to the two rotating plates 6. Figure 2-3 As shown, the cylinder 7 drives the corresponding two rotating plates to rotate in opposite directions, so that the rotating plate 6 rotates downward and contacts the side of the box body 3, thereby correcting the moving direction of the box body 3; a connecting column 8 is rotatably connected between the two rotating plates 6 symmetrically arranged with respect to the box body 3, and for the two limiting mechanisms on both sides of the same box body 3, when the rotating plate 6 of one of the limiting mechanisms is driven by the cylinder 7 to rotate, the rotating plate 6 of the other limiting mechanism is synchronously rotated through the connecting column 8, thereby ensuring the limiting effect on the box body 3.

[0033] When the gantry crane needs to move in a straight line, the two crawlers 4 must work in parallel, that is, the boxes 3 of the two crawler support mechanisms are parallel. If there is a small angle difference between the two boxes 3, the side surface (inclined surface) of the rotating plate 6 will first contact the top corner position of the box 3 through the rotation of the rotating plate 6. As the rotating plate 6 continues to rotate, the box 3 is corrected so that its length direction is parallel to the direction of the connection line between the two rotating plates 6 of the same limiting mechanism.

[0034] An annular groove 11 is provided on each of the columns 1, and a cylinder 12 is rotatably arranged in the annular groove 11. A support rod 13 is fixedly arranged between the cylinder 12 and the top of the box body 3. The two support rods 13 are symmetrical about the column 1. The support rods 13, the column 1 and the top surface of the box body 3 together form a triangular structure. The support rods 13 can effectively support the column 1 and prevent the gantry crane from tipping over, thereby improving the stability of the gantry crane when lifting heavy objects. Through the arrangement of the cylinder 12, the support effect of the support rods 13 on the column 1 is achieved without affecting the relative rotation of the column 1 and the box body 3.

[0035] The box body 3 is provided with a tightening mechanism, which includes a tightening wheel 15. The tightening wheel 15 is rotatably arranged in the box body 3 and its outer side contacts the lower side of the upper belt of the crawler 4. The two opposite side surfaces of the box body 3 are provided with strip holes 17. Bolts 16 pass through the strip holes 17. Both ends of the bolts 16 are slidably arranged in two strip holes 17 respectively. The bolts 16 pass through the box body 3 and the ends extend out of the strip holes 17 to be threadedly connected with nuts. The tightening wheel 15 is sleeved on the bolts 16. The installation of the tightening wheel 15 is achieved by the cooperation between the bolts 16 and the nuts. The height of the bolts 16 is adjusted by loosening the nuts, that is, sliding up and down in the strip holes 17, so as to achieve height adjustment of the tightening wheel 15 and further achieve tension adjustment of the crawler 4.

[0036] When in use, the crawler 4 is driven by two power mechanisms (i.e., the motor 9 and the reducer 10) to realize the movement of the two crawler support mechanisms and the movement of the gantry crane; and when the output rotation speeds of the two power mechanisms are the same, the movement speeds of the two crawler support mechanisms are the same, and the gantry crane moves in a straight line; when the output rotation speeds of the two power mechanisms are different, the movement speeds of the two crawler support mechanisms are different, and the gantry crane realizes turning.

[0037] When the gantry crane needs to turn in a small range to achieve a small range of movement of the lifting position, one of the power mechanisms stops outputting power and the other power mechanism works, and then the gantry crane rotates around the column 1 corresponding to the power mechanism that does not output power. At the same time, this method can be used to lift heavy objects near the gantry crane. Before the gantry crane moves in a straight line, since the gantry crane moves in a straight line, it is necessary to meet the requirements that the two crawlers 4 work in parallel, that is, the boxes 3 of the two crawler support mechanisms are parallel. In this way, the two crawler support mechanisms are made close to parallel, and then the cylinder 7 drives the corresponding two rotating plates to rotate in the opposite direction. Through the rotation of the rotating plate 6 When the gantry crane is moving, first the side surface (inclined surface) of the rotating plate 6 contacts the top corner position of the box body 3, and as the rotating plate 6 continues to rotate, the box body 3 is corrected so that its length direction is parallel to the direction of the connection line between the two rotating plates 6 of the same limiting mechanism, thereby correcting the travel direction of the box body 3. At this time, the rotating plate 6 rotates downward to realize the contact between the rotating plate 6 and the side of the box body 3. During the travel of the gantry crane, the rotating plate 6 limits the box body 3, so that the box body 3 and the corresponding column 1 cannot achieve relative rotation, thereby preventing the crawler 4 from rotating to both sides due to uneven road surface, etc., which causes the two columns 1 of the gantry crane to be pulled to both sides, causing damage to the gantry crane equipment.

[0038] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A crawler gantry crane, comprising two columns (1), a crossbeam (2) fixedly arranged above the two columns (1), a hoisting mechanism arranged on the crossbeam (2), characterized in that: A crawler support mechanism is arranged below each of the columns (1), and the crawler support mechanism comprises a box (3) with an opening at the lower end, a power mechanism, and a crawler (4); the box (3) is rotatably arranged below the column (1); transmission wheels are rotatably arranged at both ends of the box (3); the lower ends of the transmission wheels extend out of the box (3); the crawler (4) is wound around the two transmission wheels; and a power mechanism is arranged outside the box (3) for driving the transmission wheels to rotate; A support block (5) is fixedly arranged on each of the uprights (1), and limiting mechanisms are arranged on both sides of the support block (5), and the limiting mechanisms are symmetrically arranged with respect to the box body (3), and the limiting mechanisms include two rotating plates (6), and the upper ends of the two rotating plates (6) are rotatably arranged at the two ends of the same side of the support block (5), and the cross section of the rotating plate (6) is trapezoidal, and the side of the rotating plate (6) corresponding to the upper bottom of the trapezoidal cross section contacts the side of the box body (3), and a cylinder (7) is arranged between the two rotating plates (6) corresponding to one of the limiting mechanisms, and the two ends of the cylinder (7) are respectively hinged to the two rotating plates (6); A connecting column (8) is rotatably connected between two rotating plates (6) symmetrically arranged with respect to the box body (3).

2. A crawler gantry crane according to claim 1, characterized in that: The power mechanism comprises a motor (9) and a reducer (10); the motor (9) and the reducer (10) are fixedly arranged on the side of the box (3); the output end of the motor (9) is connected to the reducer (10); the output end of the reducer (10) passes through the side wall of the box (3) and is fixedly connected to one of the transmission wheels.

3. The crawler gantry crane according to claim 1, characterized in that: Each of the columns (1) is provided with an annular groove (11), a cylinder (12) is rotatably arranged in the annular groove (11), a support rod (13) is fixedly arranged between the cylinder (12) and the top of the box body (3), and the two support rods (13) are symmetrical about the column (1).

4. The crawler gantry crane according to claim 1, characterized in that: A sleeve (14) is fixedly arranged on the top of the box body (3), and the lower end of the column (1) is rotatably arranged in the sleeve (14).

5. The crawler gantry crane according to claim 1, characterized in that: A tightening mechanism is arranged in the box body (3), and the tightening mechanism comprises a tightening wheel (15). The tightening wheel (15) is rotatably arranged in the box body (3) and its outer side contacts the lower side of the upper belt of the crawler (4).

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