A hydraulic clamping pressure regulating device for a single-track hoist

Abstract

The present invention provides a hydraulic clamping pressure regulating device for a single-rail crane. The hydraulic clamping pressure regulating device for a single-rail crane includes a single-rail crane body; a fixing mechanism, a hydraulic driving mechanism, a transmission mechanism, and the transmission mechanism is connected to the bottom end of the hydraulic driving mechanism; a clamping mechanism, a buffer mechanism. The present invention can automatically clamp and fix workpieces, and can install workpieces of various sizes, which not only improves the practicability of the device, but also facilitates subsequent reprocessing; when the clamping plate abuts against the workpiece, by controlling the distance between the rack and the clamping plate, the compression degree of the elastic member is adjusted, so as to adjust the size of the clamping pressure of the clamping plate, further increasing the comprehensiveness of the device, realizing the reduction of the clamping pressure, effectively avoiding the serious wear and degumming of the driving wheels caused by the large clamping pressure of the locomotive, and at the same time avoiding the damage of the vulnerable parts of the clamping system, and improving the working efficiency of the device to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic clamping devices, and in particular to a hydraulic clamping pressure regulating device for a single-track crane. Background Art

[0002] The single-track crane body locomotive is an auxiliary transportation device that is highly mobile, has a fast running speed, a large load capacity, a compact structure, and is stable and safe to run on a suspended single-track system. It is widely used for auxiliary transportation in underground coal mines. Most single-track crane bodies consist of a bracket, a hanging component, a stepping and pushing component, a tensioning component, and corresponding connecting piece components.

[0003] During the pressure regulation process of the existing single-track crane body, only simple grasping can be performed, and the pressure cannot be adjusted according to the size of the clamped workpiece. When the clamping pressure is large, it is easy to cause serious wear and delamination of the driving wheels of the locomotive, and at the same time, it is easy to damage the vulnerable parts of the clamping system. Most devices cannot install workpieces of various sizes, and the practicability of the device is relatively poor. Moreover, most devices cannot adjust the clamping pressure, reducing the comprehensiveness of the device and affecting the working efficiency of the device.

[0004] Therefore, it is necessary to provide a new hydraulic clamping pressure regulating device for a single-track crane to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a hydraulic clamping pressure regulating device for a single-track crane that is convenient for fixing workpieces of different sizes.

[0006] To solve the above technical problem, the hydraulic clamping pressure regulating device for a single-track crane provided by the present invention includes: a single-track crane body;

[0007] A fixing mechanism, the fixing mechanism is installed on the side wall of the single-track crane body;

[0008] A hydraulic driving mechanism, the hydraulic driving mechanism is fixed to the side wall of the fixing mechanism;

[0009] A transmission mechanism, the transmission mechanism is connected to the bottom end of the hydraulic driving mechanism;

[0010] Clamping mechanism, the clamping mechanism is fixed to the bottom end of the fixing mechanism. The clamping mechanism includes a chute, a rack, an installation box body, a clamping plate, an elastic member, a driven gear and a driven gear shaft. The installation box body is installed at the bottom end of the fixing mechanism. The chutes are symmetrically arranged inside the installation box body, and the rack is slidably connected inside the chutes; the driven gear shaft and the driven gear are rotatably connected inside the installation box body, and the driven gear meshes with the rack; one end of the rack is installed with the elastic member, and one end of the elastic member is fixedly connected to the clamping plate with an arc-shaped side wall.

[0011] Buffering mechanism, the buffering mechanism is installed inside the hydraulic driving mechanism. The buffering mechanism includes an airbag storing lubricating oil, and a connecting plate is fixedly connected to the bottom of the airbag. A support plate is welded at the center of the bottom of the connecting plate, and the bottom of the support plate abuts against the rotating shaft of the hydraulic driving mechanism through a ball.

[0012] Specifically, the fixing mechanism includes a fixing frame and a fixing plate.

[0013] The fixing frames are symmetrically and fixedly connected to the side wall of the monorail crane body. The bottom end of the fixing frame is fixedly connected to the annular installation box body, and the fixing plates are symmetrically installed on the side wall of the fixing frame.

[0014] Specifically, the hydraulic driving mechanism includes a telescopic member, a driving box body, a moving frame, a track groove, a fixing block and a spherical block.

[0015] The driving box body is fixedly connected to the side wall of the fixing plate, and the telescopic member is fixedly connected to the monorail crane body; the bottom end of the telescopic member is connected to the moving frame, and the fixing blocks are symmetrically installed at the bottom end of the moving frame. One end of the fixing block is fixedly connected to the spherical block; the rotating shaft is rotatably connected inside the driving box body, and a spiral track groove is arranged on the side wall of the rotating shaft, and the spherical block is slidably connected inside the track groove.

[0016] Specifically, the buffering mechanism further includes an air inlet hole and an air outlet hole. The side wall of the airbag made of elastic rubber material is provided with the air inlet hole and the air outlet hole, and the air outlet hole is connected to the inside of the installation box body through a pipeline. Convex blocks are symmetrically arranged on the side wall of the connecting plate, and the convex blocks are located on the guiding grooves on the inner side wall of the moving frame.

[0017] Specifically, the transmission mechanism includes a rotating shaft, a driving gear, an external gear ring and an internal gear ring. The rotating shaft is fixedly connected to the rotating shaft, the bottom end of the rotating shaft is fixedly connected to the driving gear, the driving gear meshes with the external gear ring and the annular internal gear ring is installed on the inner side wall of the external gear ring.

[0018] As a preferred embodiment of the present invention: the diameter of the external gear ring is greater than the diameters of the driving gear and the driven gear, and the internal gear ring meshes with the driven gear.

[0019] As a further embodiment of the present invention: the bottom surface of the mounting box body is provided with an annular connecting groove, the top end of the external gear ring is provided with a fixing ring, and the fixing ring is rotatably connected to the inside of the connecting groove.

[0020] As a further embodiment of the present invention: one end of the fixing ring has a circular cross-section, and the height of the fixing ring is equal to the height of the connecting groove.

[0021] As a further embodiment of the present invention: the telescopic member is a cylinder or a hydraulic cylinder.

[0022] Compared with the related art, the hydraulic clamping pressure regulating device for a single-track crane provided by the present invention has the following beneficial effects:

[0023] The present invention provides a hydraulic clamping pressure regulating device for a single-track crane. When fixing a workpiece, the workpiece is inserted into the inside of the mounting box body, the hydraulic driving mechanism is opened, the hydraulic driving mechanism drives the transmission mechanism to rotate, the transmission mechanism pushes the driven gear to rotate inside the mounting box body, so that the driven gear pushes the rack to move inside the sliding groove, reducing the distance between the two clamping plates, making the clamping plates gradually approach and squeeze the workpiece, the clamping plates move to compress the elastic member, and the elastic member reversely squeezes the clamping plates. When the clamping plates compress the workpiece, the workpiece is clamped and fixed between the clamping plates; this device can automatically clamp and fix the workpiece, and can install workpieces of various sizes, which not only improves the practicability of the device, but also facilitates subsequent reprocessing; when the clamping plates contact the workpiece, by controlling the distance between the rack and the clamping plates, the compression degree of the elastic member is adjusted, thereby adjusting the clamping pressure of the clamping plates, further increasing the comprehensiveness of the device, realizing the reduction of the clamping pressure, effectively avoiding serious wear and degumming of the driving wheels caused by the large clamping pressure of the locomotive, and at the same time avoiding damage to the vulnerable parts of the clamping system, and improving the working efficiency of the device to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the hydraulic clamping pressure regulating device for a single-track crane provided by the present invention;

[0025] Figure 2 is Figure 1 a schematic diagram of the structure of the clamping mechanism and the transmission mechanism shown in;

[0026] Figure 3 is Figure 1 a schematic diagram of the internal structure of the mounting box body shown in;

[0027] Figure 4 is Figure 1 a schematic diagram of the overall structure of the installation box body shown in the figure;

[0028] Figure 5 is Figure 1 a cross-sectional view of the rotating shaft shown in the figure;

[0029] Figure 6 is Figure 1 an enlarged schematic diagram of part A shown in the figure;

[0030] Figure 7 is Figure 1 a schematic diagram of the internal structure of the airbag shown in the figure.

[0031] Reference numerals in the figure:

[0032] 1. Monorail hoist body,

[0033] 2. Fixing mechanism, 21. Fixing frame, 22. Fixing plate,

[0034] 3. Hydraulic drive mechanism, 31. Telescopic member, 32. Drive box body, 33. Moving frame, 331. Guide groove, 34. Track groove, 35. Rotating shaft, 36. Fixed block, 37. Spherical block,

[0035] 4. Transmission mechanism, 41. Rotating shaft, 42. Driving gear, 43. Outer gear ring, 44. Inner gear ring,

[0036] 5. Clamping mechanism, 51. Sliding groove, 52. Rack, 53. Installation box body, 54. Clamping plate, 55. Elastic member, 56. Driven gear, 57. Driven gear shaft,

[0037] 6. Fixed ring,

[0038] 7. Connecting groove,

[0039] 8. Buffer mechanism, 81. Airbag, 82. Connecting plate, 821. Protrusion, 83. Support plate, 84. Ball, 85. Air inlet hole, 86. Air outlet hole. Specific implementation mode

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] Please refer to Figures 1 to 7, the hydraulic clamping pressure regulating device for a single-rail crane includes: a single-rail crane body 1; a fixing mechanism 2, which is installed on the side wall of the single-rail crane body 1; a hydraulic driving mechanism 3, which is fixed to the side wall of the fixing mechanism 2; a transmission mechanism 4, which is connected to the bottom end of the hydraulic driving mechanism 3; a clamping mechanism 5, which is fixed to the bottom end of the fixing mechanism 2. The clamping mechanism 5 includes a chute 51, a rack 52, a mounting box 53, a clamping plate 54, an elastic member 55, a driven gear 56 and a driven gear shaft 57. The mounting box 53 is installed at the bottom end of the fixing mechanism 2. The chutes 51 are symmetrically arranged inside the mounting box 53, and the rack 52 is slidably connected inside the chutes 51; the driven gear shaft 57 and the driven gear 56 are rotatably connected inside the mounting box 53, and the driven gear 56 meshes with the rack 52; one end of the rack 52 is installed with the elastic member 55, and one end of the elastic member 55 is fixedly connected to the clamping plate 54 with an arc-shaped side wall; a buffer mechanism 8, which is installed inside the hydraulic driving mechanism 3. The buffer mechanism 8 includes an airbag 81 storing lubricating oil, and the bottom of the airbag 81 is fixedly connected with a connecting plate 82. The center of the bottom of the connecting plate 82 is welded with a support plate 83, and the bottom of the support plate 83 abuts against the rotating shaft 35 of the hydraulic driving mechanism 3 through a ball 84. The buffer mechanism 8 further includes an air inlet hole 85 and an air outlet hole 86. The side wall of the airbag 81 made of elastic rubber material is provided with the air inlet hole 85 and the air outlet hole 86, and the air outlet hole 86 is connected to the inside of the mounting box 53 through a pipeline. The side wall of the connecting plate 82 is symmetrically provided with bumps 821, and the bumps 821 are located on the guiding grooves 331 on the inner side wall of the moving frame 33. The support plate 83 drives the connecting plate 82 to move. The side wall of the connecting plate 82 is symmetrically provided with bumps 821, and the bumps 821 are located inside the guiding grooves 331, so that the rotation of the rotating shaft 35 will not deviate. The airbag 81 made of elastic rubber material can have a certain buffering effect on a large clamping pressure. At the same time, it makes the transmission more stable. Further, it provides lubrication for the clamping mechanism 5, reduces the resistance during the movement process, and enables the equipment to be used stably.

[0042] In addition to the above technical solutions, in the embodiment of the clamping mechanism 5 of the present invention, a link mechanism or a lead screw mechanism can also be used to realize the displacement adjustment of the rack 52.

[0043] In this embodiment, the fixing mechanism 2 includes a fixing frame 21 and a fixing plate 22. The fixing frames 21 are symmetrically and fixedly connected to the side wall of the single-rail crane body 1. The bottom end of the fixing frame 21 is fixedly connected to the annular mounting box 53. The fixing plates 22 are symmetrically installed on the side wall of the fixing frame 21, so as to conveniently use the fixing frame 21 to fix the mounting box 53 above the single-rail crane body 1.

[0044] Specifically, the hydraulic drive mechanism 3 includes a telescopic member 31, a drive box 32, a movable frame 33, a track groove 34, a rotating shaft 35, a fixed block 36 and a spherical block 37. The side wall of the fixed plate 22 is fixedly connected to the drive box 32, and the telescopic member 31 is fixedly connected to the monorail crane body 1; the bottom end of the telescopic member 31 is connected to the movable frame 33, and the fixed block 36 is symmetrically installed at the bottom end of the movable frame 33, and one end of the fixed block 36 is fixedly connected to the spherical block 37; the interior of the drive box 32 is rotatably connected to the rotating shaft 35, the side wall of the rotating shaft 35 is provided with a spiral track groove 34, and the interior of the track groove 34 is slidably connected to the spherical block 37, and the transmission mechanism 4 includes a rotating shaft 41, a driving gear 42, an outer gear ring 43 and an inner gear ring 44, the rotating shaft 41 is fixedly connected to the rotating shaft 35, and the bottom end of the rotating shaft 35 The driving gear 42 is fixedly connected, the driving gear 42 meshes with the outer gear ring 43 and the inner side wall of the outer gear ring 43 is installed with the annular inner gear ring 44; the telescopic member 31 drives the movable frame 33 and the fixed block 36 to move downward, the fixed block 36 moves downward to squeeze the spherical block 37, so that the spherical block 37 squeezes the spiral track groove 34 downward, and the rotating shaft 35 drives the track groove 34 to rotate on the side wall of the spherical block 37, so that the movable frame 33, the fixed block 36 and the spherical block 37 can move linearly downward. During this process, the rotating shaft 35 pushes the rotating shaft 41, the driving gear 42, the outer gear ring 43 and the inner gear ring 44 to rotate; and the rotation of the rotating shaft 35 causes the spherical block 37 to rotate inside the track groove 34, reducing the resistance of the spherical block 37 to the movement inside the rotating shaft 35.

[0045] See also Figure 2 The diameter of the outer gear ring 43 is greater than the diameters of the driving gear 42 and the driven gear 56, and the inner gear ring 44 meshes with the driven gear 56. In order to facilitate the driving gear 42 to push the outer gear ring 43 to rotate more labor-saving, and when the inner gear ring 44 pushes the driven gear 56, the speed of the driven gear 56 is greater than the rotation of the outer gear ring 43, so that the driven gear 56 can drive the rack 52 to move.

[0046] See also Figure 1 and Figure 4, a circular connection groove 7 is provided on the bottom surface of the installation box body 53, a fixing ring 6 is installed at the top end of the external gear ring 43, and the fixing ring 6 is rotationally connected to the inside of the connection groove 7; one end cross-section of the fixing ring 6 is a circular structure, and the height of the fixing ring 6 is equal to the height of the connection groove 7. In order to facilitate the rotation of the external gear ring 43 to drive the fixing ring 6 to rotate inside the connection groove 7, the fixing ring 6 is stuck in the connection groove 7, thereby fixing the external gear ring 43 below the installation box body 53 and enabling the external gear ring 43 to rotate on the bottom surface of the installation box body 53.

[0047] In addition to the above technical solutions, in the embodiment of the hydraulic driving mechanism 3 of the present invention, the telescopic member 31 adopts driving elements such as air cylinders and hydraulic cylinders; it can also adopt rollers or roller shafts slidingly connected to the rotating shaft 35 to realize the rotation of the rotating shaft 35.

[0048] The working principle of the hydraulic clamping pressure regulating device for the single-track crane provided by the present invention is as follows: When fixing a workpiece, the workpiece is inserted into the interior of the installation box body 53, and the workpiece is located between the two clamping plates 54. Connect the telescopic member 31 to an external power source and turn on the telescopic member 31, so that the telescopic member 31 drives the moving frame 33 and the fixed block 36 to move downward. The downward movement of the fixed block 36 presses the spherical block 37, causing the spherical block 37 to press the spiral track groove 34 downward, so that the rotating shaft 35 drives the track groove 34 to rotate on the side wall of the spherical block 37, facilitating the downward linear movement of the moving frame 33, the fixed block 36 and the spherical block 37. During this process, the rotating shaft 35 pushes the rotating shaft 41, the driving gear 42, the external gear ring 43 and the internal gear ring 44 to rotate; and when the rotating shaft 35 rotates, the spherical block 37 rotates inside the track groove 34. The contact area between the spherical block 37 and the track groove 34 is small, reducing the resistance of the spherical block 37 moving inside the rotating shaft 35; at the same time, since the moving frame 33 of the hydraulic driving mechanism 3 moves downward, the rotating shaft 35 will press the buffer mechanism 8. Specifically, the rotating shaft 35 presses the ball 84, and the support plate 83 connected to the ball 84 moves upward. (Since a groove corresponding to the ball 84 is provided at the center of the top of the rotating shaft 35, the support plate 83 moves more smoothly during the upward movement. At the same time, the ball 84 can reduce the resistance of the rotating shaft 35 to rotate), the support plate 83 drives the connecting plate 82 to move. The side wall of the connecting plate 82 is symmetrically provided with convex blocks 821, and the convex blocks 821 are located inside the guiding groove 331, so that the rotation of the rotating shaft 35 will not deviate. The airbag 81 made of elastic rubber material can have a certain buffering effect on a large clamping pressure. At the same time, the transmission is made more stable to ensure the normal operation of the equipment. After being squeezed, the airbag 81 will squeeze the lubricating oil inside the airbag 81 into the interior of the installation box body 53 through the air outlet hole 86 (the air outlet hole 86 is connected to the interior of the installation box body 53 through a pipeline), realizing the lubrication of the rack 52. The air outlet hole 86 is located below the air inlet hole 85, which can prevent the lubricating oil from being squeezed out from the air inlet hole 85. Check valves are installed inside both the air inlet hole 85 and the air outlet hole 86. The air inlet hole is used to provide gas when the airbag 81 is reset. Moreover, during this process, the lubricating oil flowing out of the air outlet hole 86 is a small amount of lubricating oil. When the internal lubricating oil is insufficient, it can be added from the air inlet hole 85. And when the external gear ring 43 rotates, it drives the fixed ring 6 to rotate inside the connection groove 7. The fixed ring 6 is stuck in the connection groove 7, thereby fixing the external gear ring 43 below the installation box body 53, so that the external gear ring 43 rotates on the bottom surface of the installation box body 53.The outer gear ring 43 drives the inner gear ring 44 to rotate. The inner gear ring 44 pushes the driven gear 56 to rotate inside the mounting box body 53, causing the driven gear 56 to push the rack 52 to move inside the sliding groove 51, reducing the distance between the two clamping plates 54, making the clamping plates 54 gradually approach and squeeze the workpiece. The clamping plates 54 move to compress the elastic member 55, and the elastic member 55 squeezes the clamping plates 54 in the reverse direction. When the clamping plates 54 compress the workpiece, the workpiece is clamped and fixed between the clamping plates 54. This device can automatically clamp and fix the workpiece and can install workpieces of various sizes, which not only improves the practicality of the device but also facilitates subsequent reprocessing. After the clamping plates 54 contact the workpiece, by controlling the distance between the rack 52 and the clamping plates 54, the compression degree of the elastic member 55 is adjusted, thereby adjusting the clamping pressure of the clamping plates 54, further increasing the comprehensiveness of the device and improving the working efficiency of the device to a certain extent.

[0049] Compared with the related art, the hydraulic clamping pressure regulating device for a single-track crane provided by the present invention has the following beneficial effects:

[0050] The present invention provides a hydraulic clamping pressure regulating device for a single-track crane. When fixing a workpiece, the workpiece is inserted into the mounting box body 53, and the hydraulic driving mechanism 3 is turned on. The hydraulic driving mechanism 3 drives the transmission mechanism 4 to rotate. The transmission mechanism pushes the driven gear 56 to rotate inside the mounting box body 53, causing the driven gear 56 to push the rack 52 to move inside the sliding groove 51, reducing the distance between the two clamping plates 54, making the clamping plates 54 gradually approach and squeeze the workpiece. The clamping plates 54 move to compress the elastic member 55, and the elastic member 55 squeezes the clamping plates 54 in the reverse direction. When the clamping plates 54 compress the workpiece, the workpiece is clamped and fixed between the clamping plates 54. This device can automatically clamp and fix the workpiece and can install workpieces of various sizes, which not only improves the practicality of the device but also facilitates subsequent reprocessing. After the clamping plates 54 contact the workpiece, by controlling the distance between the rack 52 and the clamping plates 54, the compression degree of the elastic member 55 is adjusted, thereby adjusting the clamping pressure of the clamping plates 54, further increasing the comprehensiveness of the device and improving the working efficiency of the device to a certain extent.

[0051] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A hydraulic clamping pressure regulating device for a single-track crane, characterized in that, Including: The single-rail hoist body (1); The fixing mechanism (2), which is installed on the side wall of the single-rail hoist body (1); The hydraulic driving mechanism (3), which is fixed on the side wall of the fixing mechanism (2); The transmission mechanism (4), which is connected to the bottom end of the hydraulic driving mechanism (3); The clamping mechanism (5), which is fixed at the bottom end of the fixing mechanism (2). The clamping mechanism (5) includes a chute (51), a rack (52), an installation box body (53), a clamping plate (54), an elastic member (55), a driven gear (56) and a driven gear shaft (57). Among them, The installation box body (53) is installed at the bottom end of the fixing mechanism (2). The chutes (51) are symmetrically arranged inside the installation box body (53), and the racks (52) are slidably connected inside the chutes (51); the driven gear shaft (57) and the driven gear (56) are rotatably connected inside the installation box body (53), and the driven gear (56) meshes with the rack (52); one end of the rack (52) is installed with the elastic member (55), and one end of the elastic member (55) is fixedly connected to the clamping plate (54) with an arc-shaped side wall; The buffer mechanism (8), which is installed inside the hydraulic driving mechanism (3). The buffer mechanism (8) includes an air bag (81) storing lubricating oil. The bottom of the air bag (81) is fixedly connected with a connecting plate (82). The center of the bottom of the connecting plate (82) is welded with a support plate (83), and the bottom of the support plate (83) abuts against the rotating shaft (35) of the hydraulic driving mechanism (3) through a ball (84); The fixing mechanism (2) includes a fixing frame (21) and a fixing plate (22), The fixing frames (21) are symmetrically and fixedly connected to the side wall of the single-rail hoist body (1). The bottom end of the fixing frame (21) is fixedly connected to the annular installation box body (53). The fixing plates (22) are symmetrically installed on the side wall of the fixing frame (21); The hydraulic driving mechanism (3) includes a telescopic member (31), a driving box body (32), a moving frame (33), a track groove (34), a fixing block (36) and a spherical block (37), The driving box body (32) is fixedly connected to the side wall of the fixing plate (22), and the telescopic member (31) is fixedly connected to the single-rail hoist body (1); the bottom end of the telescopic member (31) is connected to the moving frame (33). The fixing blocks (36) are symmetrically installed at the bottom end of the moving frame (33), and one end of the fixing block (36) is fixedly connected to the spherical block (37); the rotating shaft (35) is rotatably connected inside the driving box body (32). A spiral track groove (34) is arranged on the side wall of the rotating shaft (35), and the spherical block (37) is slidably connected inside the track groove (34); The buffer mechanism (8) further includes an air inlet hole (85) and an air outlet hole (86). The side wall of the airbag (81) made of elastic rubber material is provided with the air inlet hole (85) and the air outlet hole (86), and the air outlet hole (86) is connected to the inside of the installation box body (53) through a pipeline. The side wall of the connecting plate (82) is symmetrically provided with bumps (821), and the bumps (821) are located on the guide grooves (331) on the inner side wall of the moving frame (33).

2. The hydraulic clamping pressure regulating device for a single-track crane according to claim 1, wherein The transmission mechanism (4) includes a rotating shaft (41), a driving gear (42), an external gear ring (43) and an internal gear ring (44). The rotating shaft (41) is fixedly connected to the rotating shaft (35). The bottom end of the rotating shaft (35) is fixedly connected to the driving gear (42). The driving gear (42) meshes with the external gear ring (43), and the internal gear ring (44) is installed on the inner side wall of the external gear ring (43).

3. The hydraulic clamping pressure regulating device for a single-track crane according to claim 2, characterized in that, The diameter of the external gear ring (43) is larger than the diameters of the driving gear (42) and the driven gear (56), and the internal gear ring (44) meshes with the driven gear (56).

4. The hydraulic clamping pressure regulating device for a single-rail hoist according to claim 3, characterized in that, The bottom surface of the installation box body (53) is provided with an annular connecting groove (7). The top end of the external gear ring (43) is provided with a fixing ring (6), and the fixing ring (6) is rotatably connected to the inside of the connecting groove (7).

5. The hydraulic clamping pressure regulating device for a single-rail hoist according to claim 4, characterized in that, One end cross-section of the fixing ring (6) is a circular structure, and the height of the fixing ring (6) is equal to the height of the connecting groove (7).

6. The hydraulic clamping pressure regulating device for a single-rail hoist according to claim 3, characterized in that, The telescopic member (31) is a cylinder or a hydraulic cylinder.

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