Rolling auxiliary force bearing mechanism

Abstract

The present invention relates to a rolling auxiliary force-bearing mechanism, comprising a lifting device, a roller device and a frame, wherein the frame is a cylindrical structure that penetrates from top to bottom, the majority of the lifting device is located in the frame, the fixed part of the lifting device is installed on the frame, a gap is left between the movable part of the lifting device and the frame, the movable part is exposed from the lower part of the frame, and is hinged to the upper part of the roller device, the hinge axis extends horizontally front and back, the middle and lower part of the roller device is provided with an upper, middle and lower three-sided surrounding structure with an opening facing backwards, the fixed part is hinged to the frame, and the hinge axis extends horizontally left and right. By using the present invention, even in the case of transitional wear of the bottom hook of the guide sliding shoe and the walking wheel teeth in a hard block rock environment, the normal meshing state of the walking system can be guaranteed, thereby providing effective traction.

Description

Technical Field

[0001] The invention relates to an auxiliary force-bearing mechanism used in conjunction with a track of a coal mining machine traveling system, which can provide a constant downward force for the traveling system, so that the traveling mechanism always maintains a normal meshing state. Background Art

[0002] When the guide shoe of the coal mining machine encounters a large amount of hard and difficult-to-break rock environment, the walking system is prone to premature failure, especially the hardened layer of the bottom hook of the guide shoe wears quickly, and when the size of the guide frame of the guide shoe wears too much, the normal engagement between the walking wheel and the pin row cannot be guaranteed, which ultimately leads to a significant reduction in the climbing ability of the coal mining machine, seriously affecting mining, especially on working faces with an inclination of more than 20°, which will seriously affect or restrict mining.

[0003] In response to the above problems, the industry has proposed many optimization and improvement plans, including: increasing the depth of the hardened layer of the guide shoe and the walking wheel to increase their service life; setting the easily worn guide shoe bottom hook into a detachable structure, which can be replaced in time after wear to avoid overall replacement and reduce losses; strengthening maintenance and timely cleaning of hard rock blocks in the track to reduce the breakage of hard rock blocks by the walking system; adopting a new structure of the walking system, etc.

[0004] However, due to the complexity of on-site working conditions, in actual practice, no matter which of the above improvement schemes is used, it is impossible to completely avoid the impact of rock powder and hard rock blocks on the walking system. Therefore, the problem of wear of the guide shoes and walking wheels is still prominent. Summary of the invention

[0005] The purpose of the present invention is to provide a rolling auxiliary force-bearing mechanism, which can ensure the normal meshing state of the walking system even when the guide shoe bottom hook and the walking wheel teeth are excessively worn in a hard rock environment, thereby providing effective traction.

[0006] The main technical solutions of the present invention are:

[0007] A rolling auxiliary force-bearing mechanism, comprising a lifting device, a roller device and a frame, wherein the frame is a cylindrical structure that is passed through from top to bottom, and the lifting device comprises a cylinder, an end cover, a piston rod, a piston and a connecting plate, and a cylindrical convex shaft extending outward is provided on the outer wall of the cylinder near the lower edge, the end cover is fixed to the upper open end of the cylinder and closes the cylinder, the piston is fixedly connected to the lower end of the piston rod, the piston rod passes through the end cover and slides up and down with the end cover, and the piston slides up and down with the cylinder, and an exhaust channel connecting the inside and outside of the cylinder is provided on the side wall of the cylinder near the lower edge, and the piston divides the internal space of the cylinder into The hydraulic chamber above and the atmospheric chamber below, the connecting plate is strip-shaped, the connecting plate is extended in the left and right directions, the middle part of the connecting plate is horizontally fixed to the upper end of the piston rod, the left and right ends of the connecting plate are respectively provided with connecting plate cylindrical pins cantilevered in the left and right directions, the top surface of the frame is provided with left and right U-shaped grooves, the connecting plate cylindrical pins are correspondingly installed in the U-shaped grooves, most of the cylinder is located in the frame, and a gap is left between the cylinder and the frame, the convex shaft is located outside the frame and extends to the front of the frame, the upper part of the roller device is hinged on the convex shaft, and the middle and lower parts of the roller device are provided with an upper, middle and lower three-sided surrounding structure with an opening facing backwards.

[0008] The roller device may include a vertical plate and a roller, the upper part of the vertical plate is provided with a connecting hole that passes through the front and rear, the vertical plate is hinged on the convex shaft through the connecting hole, an upper beam body protruding backwards is provided at the middle and upper part of the rear side plate surface of the vertical plate and below the connecting hole, and a guide body protruding backwards is provided at the lower part of the rear side plate surface of the vertical plate, and a plurality of roller mounting holes arranged at intervals left and right are opened on the guide body, the axis of the roller mounting hole extends horizontally front and back, and the top and bottom of the roller mounting hole are respectively set as a top notch and a bottom notch that pass through the front and rear, and there is a roller in each roller mounting hole, the roller is mounted on the vertical plate, a gap is maintained between the roller and the roller mounting hole, the highest point of the roller is higher than the top surface of the guide body, and the upper beam body, the roller and the vertical plate part located between the upper beam body and the guide body form an upper, middle and lower three-sided surrounding structure with the opening facing backwards.

[0009] An up-and-down sliding guide structure is arranged between the cylinder and the frame on the left and right sides.

[0010] The up-and-down sliding guide structure may include a vertically extending cylindrical pin disposed at the upper middle portion of the outer wall of the cylinder and a frame slide groove disposed at the lower middle portion of the inner wall of the frame, wherein the frame slide groove is a non-through groove extending up and down.

[0011] The convex shaft is preferably sleeved with one or more adjustment rings, a nut is screwed onto the end of the convex shaft, and the vertical plate is sleeved on the convex shaft and located between the nut and the adjustment ring.

[0012] The lower surface of the upper beam body is provided with an upper beam body wear-resistant layer, the top surface of the guide body is provided with a guide body wear-resistant layer, and the rear side plate surface of the vertical plate part located between the upper beam body and the guide body is provided with a vertical plate wear-resistant layer.

[0013] The surface of the roller is preferably provided with a plurality of anti-skid grooves, which extend along the axial direction of the roller and are front-to-back through grooves.

[0014] A plurality of pins can be fixed on the lower part of the vertical plate, and the pins correspond to the rollers one by one. The axis of the pins extends horizontally front and back, and the rear of the pins is exposed in the roller mounting hole. The roller is rotatably supported on the rear journal of the pin through a roller group. A positioning cover is installed in the inner hole of the roller and behind the roller group. The positioning cover is fixed on the pin and limits the roller group axially.

[0015] An oil injection channel may also be provided in the pin shaft, the inlet of the oil injection channel is opened on the exposed surface of the front part of the pin shaft and is installed with an oil injection nozzle, the outlet of the oil injection channel is opened on the rear journal of the pin shaft and is located between adjacent roller groups in the axial direction of the pin shaft, and a seal is provided between the positioning cover and the roller.

[0016] The frame may include a connecting seat and a positioning plate, wherein the positioning plate is a C-shaped structure with an open side which is formed by a front plate, a side plate and a rear plate arranged in sequence, and the connecting seat is installed on the open side of the positioning plate, so that the frame becomes a cylindrical structure with a rectangular cross-section, and the cross-section of the cylinder is rectangular.

[0017] Furthermore, one of the frame slide grooves is arranged on the inner wall of the side plate of the positioning plate, and the other is arranged on the side plate surface of the connecting seat facing the positioning plate, the convex shaft is arranged on the front outer wall of the cylinder, and the cylinder cylindrical pin is arranged on the left and right outer walls of the cylinder.

[0018] The beneficial effects of the present invention are:

[0019] Since the oil pressure in the hydraulic chamber (low-pressure oil of the back pressure of the hydraulic system of the coal mining machine itself) can be used to provide a downward pressure to the walking system side of the coal mining machine, and the force is always kept constant (unless the hydraulic pressure is adjusted), even in complex working conditions such as hard block rock and transitional wear of the guide sliding shoe bottom hook and the walking wheel teeth, the walking mechanism can be kept in a downward pressure state, so that the walking mechanism is in a normal meshing state, thereby providing effective traction. At the same time, the auxiliary force provided by the present invention can also share the force of the guide sliding shoe bottom hook, thereby greatly reducing the wear of the guide sliding shoe bottom hook and extending its service life.

[0020] The invention can be directly installed on existing equipment and has good versatility.

[0021] Since the movable part of the lifting device can move up and down relative to the frame, the movable part can change its height position relative to the travel box together with the track. Therefore, the rolling auxiliary force-bearing mechanism of the present invention can adapt to the up and down bending of the track relative to the travel box when changing its working position with the track.

[0022] By leaving a front-to-rear gap between the movable part of the lifting device and the frame, the movable part of the lifting device can swing slightly back and forth during the up and down movement. Therefore, the rolling auxiliary force-bearing mechanism of the present invention can also adapt to the front-to-rear bending of the track relative to the walking box when the working position changes with the track.

[0023] Since the frame limits the up and down movement of the movable part of the lifting device, the relative movement friction resistance of the track on the roller device can be promptly transmitted to the traveling box shell through the movable part, fixed part and frame of the lifting device, thereby avoiding excessive abnormal force on the fixed part of the lifting device.

[0024] The free swinging freedom of the roller device relative to the cylinder in the left and right directions can ensure that the rollers below are evenly loaded at the same time. The rollers roll relative to the track. Although the positive contact pressure is large, the rolling friction has little wear on the roller surface and the track contact surface, which is conducive to extending the service life of the rolling auxiliary force-bearing mechanism and has little impact on the life of the track. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A front view of an embodiment of the present invention;

[0026] Figure 2 for Figure 1 Left view of

[0027] Figure 3 for Figure 1 A top view of

[0028] Figure 4 for Figure 3 AA section view;

[0029] Figure 5 for Figure 3 BB cross-sectional view;

[0030] Figure 6 for Figure 3 A top view of the positioning plate described in;

[0031] Figure 7 for Figure 1 A schematic structural diagram of the roller device described in;

[0032] Figure 8 for Figure 7 CC step section view;

[0033] Fig. 9 It is a schematic diagram of the state when the lifting device is sliding up and down accompanied by forward and backward swinging;

[0034] Fig.10 It is a schematic diagram of the state when the cylinder of the lifting device of the present invention is at the highest point;

[0035] Fig.11 It is a schematic diagram of the state when the cylinder of the lifting device of the present invention is at the lowest position;

[0036] Fig.12 It is a schematic diagram of the relative position relationship between the guide shoe and the track of the coal mining machine during normal use of the present invention.

[0037] Reference numerals:

[0038] 1. Lifting device; 11. Cylinder; 111. Cylinder cylindrical pin; 114. Cam shaft; 12. Connecting plate; 121. Connecting plate cylindrical pin; 13. Piston rod; 14. Piston; 15. End cover; 16. Oil inlet joint; 19. Adjusting ring.

[0039] 2. Roller device; 21. Vertical plate; 211. Connecting hole; 212. Upper beam body; 2121. Upper beam body wear-resistant layer; 213. Guide body; 2131. Guide body wear-resistant layer; 214. Vertical plate wear-resistant layer; 215. Inclined surface; 22. Roller; 221. Anti-skid groove; 23. Pin shaft; 24. Roller group; 25. Pressing plate; 26. Oil injection channel; 27. Seal; 28. Positioning cover;

[0040] 3. Connecting seat; 31. The side of the connecting seat facing the positioning plate; 32. The connecting seat positioning hole; 33. The connecting seat slide groove; 34. The groove on the connecting seat; 35. The connecting seat mounting hole;

[0041] 4. Connecting seat screws;

[0042] 5. Positioning plate; 51. Overhang end surface; 52. Positioning plate positioning pin; 54. Inner wall of the side plate of the positioning plate; 55. Positioning plate slide groove; 56. Positioning plate groove; 57. Positioning plate screw hole;

[0043] 6. Positioning plate screws;

[0044] 01. Walking box;

[0045] 02. Track. DETAILED DESCRIPTION

[0046] like Figure 1-12As shown, the present invention discloses a rolling auxiliary force-bearing mechanism, including a lifting device 1, a roller device 2 and a frame, wherein the frame is a cylindrical structure that penetrates from top to bottom. The lifting device includes a cylinder 11, an end cover 15, a piston rod 13, a piston 14 and a connecting plate 12, and a cylindrical convex shaft 114 extending outward is provided on the outer wall of the cylinder near the lower edge. The end cover is fixed to the upper open end of the cylinder and closes the cylinder. The piston is fixedly connected to the lower end of the piston rod, and the piston rod passes through the end cover and slides up and down with the end cover, while the piston slides up and down with the cylinder. An exhaust channel connecting the inside and outside of the cylinder is provided on the side wall of the cylinder near the lower edge. The piston divides the internal space of the cylinder into an upper hydraulic chamber and a lower atmospheric chamber. The connecting plate is in the shape of a strip, and the connecting plate is extended in the left-right direction. The middle part of the connecting plate is horizontally fixed to the upper end of the piston rod. The left and right ends of the connecting plate are respectively provided with connecting plate cylindrical pins 121 cantilevered in the left-right direction. The top surface of the frame is provided with left and right U-shaped grooves, and the connecting plate cylindrical pins are correspondingly installed in the U-shaped grooves to realize the hinge connection between the piston rod and the frame. Most of the cylinder is located in the frame, and a gap is left between the cylinder and the frame, and the cylinder can move up and down. The convex shaft is located outside the frame and extends to the front of the frame, and the upper part of the roller device is hinged on the convex shaft. The middle and lower parts of the roller device are provided with an upper, middle and lower three-sided enclosing structure with an opening facing backwards.

[0047] When in use, the frame of the rolling auxiliary force-bearing mechanism is fixed on the coal mining machine walking box 01, specifically on the left outer wall of the left walking box and the right outer wall of the right walking box. At the same time, the upper, middle and lower surrounding structures wrap the track 02 of the coal mining machine from the front (also the coal wall side) to ensure that the roller device has a relatively stable position relative to the track to avoid leaving the track.

[0048] When a constant hydraulic pressure is provided to the lifting device, the fixed part of the lifting device (including the connecting plate, piston rod and piston) tends to retract into the cylinder, and the movable part of the lifting device (including the cylinder and the end cover) moves upward or tends to move upward relative to the fixed part, so a pulling force is generated between the frame and the roller device, pulling the travel box toward the track. Specifically, the roller device generates an upward pulling force on the track, and the frame provides a constant downward thrust to the coal mining machine travel system (including the travel wheel) through the travel box 01, forcing the coal mining machine's travel wheel to always remain in mesh with the track pin row, thereby providing effective traction. Even if there are rock blocks trapped in the tooth sockets, the rock blocks can be crushed with a sufficiently large traction force to reach a normal meshing state. At the same time, the above-mentioned pulling force also enables the upper wear-resistant layer of the guide shoe to maintain contact with the top surface of the track even when the bottom hook of the guide shoe is worn.

[0049] The freedom of the cylinder to move up and down relative to the frame, the freedom of the cylinder to swing forward and backward with the cylindrical pin of the connecting plate as the axis, and the freedom of the roller device to swing left and right with the convex shaft as the axis enable the rolling auxiliary force-bearing mechanism to have the floating ability in the above-mentioned multiple directions, so the rolling auxiliary force-bearing mechanism can adapt to the up and down fluctuations, front and back bending and track angle changes caused by the up and down fluctuations of the track, that is, the up and down fluctuations, front and back bending and track angle changes caused by the up and down fluctuations of the track will not affect the rolling auxiliary force-bearing mechanism to continuously apply tension between the walking box and the track, so that the meshing between the walking wheel and the track pin row can be maintained permanently without being affected by the wear degree of the bottom hook of the guide sliding shoe and whether there are rocks trapped in the tooth socket, so that effective traction is maintained permanently. In addition, the above-mentioned floating ability also avoids the conventional meshing system of the guide sliding shoe walking wheel from being stuck when the rolling auxiliary force-bearing mechanism is working.

[0050] Usually the width of the U-shaped groove is greater than the diameter of the cylindrical pin of the connecting plate to provide a larger activity margin for the connecting plate.

[0051] The roller device 2 includes a vertical plate 21 and a roller 22. The upper part of the vertical plate is provided with a connecting hole 211 that passes through the front and back, and the vertical plate is hinged on the convex shaft through the connecting hole. An upper beam body 212 that protrudes backward is provided at the middle and upper part of the rear side plate surface of the vertical plate and below the connecting hole, and a guide body 213 that protrudes backward is provided at the lower part of the rear side plate surface of the vertical plate. The upper beam body and the guide body are both in the shape of strips extending left and right. The guide body is provided with a plurality of roller mounting holes arranged at intervals left and right, the axis of the roller mounting hole extends horizontally front and back, and the top and bottom of the roller mounting hole are respectively set as a top notch and a bottom notch that pass through the front and back. There is a roller in each roller mounting hole, and the roller is mounted on the vertical plate. The roller can rotate relative to the vertical plate, and a gap is maintained between the roller and the roller mounting hole so as not to hinder the rotation of the roller. The highest point of the roller (the part exposed from the top notch of the roller mounting hole) is higher than the top surface of the guide body, and the upper beam body, the roller and the vertical plate part located between the upper beam body and the guide body form the above-mentioned upper, middle and lower three-sided surrounding structure with the opening facing backward, which can be simply referred to as a frame opening.

[0052] Since rollers are used and the highest point of the rollers is higher than the top surface of the guide body, rolling friction occurs between the lower surface of the coal wall side of the track and the lower surface of the frame opening during normal operation, thereby avoiding friction and wear caused by large contact stress.

[0053] An up-and-down sliding guide structure is arranged between the cylinder and the frame on the left and right sides respectively, for guiding the cylinder when it moves up and down.

[0054] The up-and-down sliding guide structure includes a vertically extending cylindrical pin 111 of the cylinder arranged on the outer wall of the cylinder and a frame slide groove arranged in the middle and lower part of the inner wall of the frame, and the frame slide groove is a non-through groove extending up and down. The non-through groove is used to limit the end points of the stroke of the cylinder sliding up and down. The cylindrical pin of the cylinder is preferably located in the middle and upper part of the outer wall of the cylinder. The left and right cylindrical pins of the cylinder are preferably symmetrically distributed relative to the center line of the cylinder, and correspondingly, the left and right frame slide grooves are also symmetrically distributed, so that the up-and-down sliding guide structure can guide the cylinder to maintain a roughly vertical direction when moving up and down.

[0055] An oil inlet connector 16 for injecting oil into the hydraulic chamber may be mounted on the end cover.

[0056] A manual air release plug can also be installed on the end cover. After the manual air release plug is installed and before the oil pressure acts, the hydraulic cavity can be effectively discharged through the manual air release plug.

[0057] The top of the piston rod and the connecting plate can be positioned by a stopper structure and fixedly connected by a plurality of screws. In the embodiment shown in the accompanying drawings, a convex stopper is provided at the top of the piston rod, a concave stopper is provided at the middle of the bottom surface of the connecting plate, and the screws for connecting the piston rod and the connecting plate are vertically installed at the position where the convex stopper and the concave stopper are inserted.

[0058] One or more adjusting rings 19 are sleeved on the convex shaft, a nut is screwed on the end of the convex shaft, and the vertical plate is sleeved on the convex shaft and located between the nut and the adjusting ring. The nut can prevent the roller device from jumping out of the convex shaft. By using a combination of adjusting rings of different numbers and / or different thicknesses, the front-to-back distance between the roller device and the cylinder can be controlled, thereby adapting to the front-to-back bending of the coal mining machine track, providing sufficient deflection clearance and ensuring normal contact between the roller and the track.

[0059] The lower surface of the upper beam body is provided with an upper beam body wear-resistant layer 2121, the top surface of the guide body is provided with a guide body wear-resistant layer 2131, and the rear side plate surface of the vertical plate part between the upper beam body and the guide body is provided with a vertical plate wear-resistant layer 214, that is, the surface of the frame opening is covered with a wear-resistant layer. In this case, the highest point of the roller should be higher than the top surface of the guide body wear-resistant layer. In other words, when the guide body wear-resistant layer is provided, the top surface of the guide body wear-resistant layer is also the surface of the guide body.

[0060] The guide body and the guide body wear-resistant layer also have the function of cleaning the mineral materials around the track, thereby reducing the adverse effects of these mineral materials on the roller.

[0061] The left and right edges of the rear side plate surface of the vertical plate portion located between the upper beam body and the guide body can be set as a slope 215 or a chamfer to guide the end of the track to enter the frame opening on the roller device.

[0062] The board surface of the vertical board can be set to be a triangle or a trapezoid that is narrow at the top and wide at the bottom.

[0063] The surface of the roller is preferably provided with a plurality of anti-skid grooves 221, which extend along the axial direction of the roller and are front-to-back through grooves, and can prevent the contact surface between the roller and the track from slipping.

[0064] Regarding the installation structure of the roller, a plurality of pins 23 are fixed at the lower part of the vertical plate, and the pins are usually tightly fitted with the vertical plate. The pins correspond to the rollers one by one, and the axis of the pins extends horizontally front and back, and the rear of the pins is exposed in the roller installation hole. The roller is rotatably supported on the rear journal of the pins through the roller group 24. A positioning cover 28 is installed in the inner hole of the roller and behind the roller group. The positioning cover can be fixed on the pins by screws, and the positioning cover plays an axial limit role for the roller group.

[0065] The roller set preferably has a plurality of rows spaced apart from each other, so as to have a greater load-bearing capacity.

[0066] The pin shaft is preferably provided with an oil injection channel 26, and the inlet of the oil injection channel is opened on the exposed surface of the front part of the pin shaft to facilitate the operation of injecting grease. An oil injection nozzle is installed at the inlet of the oil injection channel. The outlet of the oil injection channel is opened on the rear journal of the pin shaft and is located between the adjacent roller groups in the axial direction of the pin shaft, so that grease can be provided to two adjacent roller groups at the same time. At the same time, a seal 27 is provided between the positioning cover and the roller to prevent the grease from overflowing from the last row of roller groups to the outside of the roller. The setting of the oil injection channel can be used to inject grease into the roller group regularly, so as to ensure that the roller group has sufficient lubrication.

[0067] Furthermore, the front part of the pin shaft may be provided with a radially outwardly extending flange, and the pin shaft may be axially positioned on the vertical plate through the flange. The front side plate surface of the vertical plate is flush with the front end surface of the pin shaft, and a long strip pressure plate groove is provided on these two planes, and a pressure plate 25 is installed in the pressure plate groove, and the pressure plate is fixed to the vertical plate by countersunk screws. Usually, a pressure plate passes through the front end surfaces of multiple adjacent pin shafts (at Figure 1 The pins are axially limited to prevent them from jumping out from the front. A through hole is provided in the area where the pressure plate contacts the front end surface of the pin, and the oil injection nozzle is exposed in the through hole.

[0068] The frame includes a connection seat 3 and a positioning plate 5. The positioning plate is a C-shaped structure with one side open, which is formed by a front plate, a side plate and a rear plate arranged in sequence. The connection seat is installed on the open side of the positioning plate, so that the frame becomes a cylindrical structure with a rectangular cross section. The cross section of the cylinder is rectangular.

[0069] Further, one of the frame slide grooves, namely the positioning plate slide groove 55, is arranged on the inner wall 54 of the side plate of the positioning plate, and the other, namely the connecting seat slide groove 33, is arranged on the side plate surface 31 of the connecting seat facing the positioning plate. The convex shaft is arranged on the front outer wall of the cylinder, and the cylinder cylindrical pin is arranged on the left and right outer walls of the cylinder.

[0070] Regarding the connection between the connecting seat and the positioning plate, the connection method in the embodiment shown in the accompanying drawings is: a positioning plate screw hole 57 is respectively provided in the front plate and the rear plate of the positioning plate, and a positioning plate positioning pin 52 is respectively provided on the overhanging end surface 51 of the front plate and the rear plate, and correspondingly, two front and rear connecting seat positioning holes 32 are provided on the plate surface of one side of the connecting seat facing the positioning plate. During installation, the overhanging end surfaces of the positioning plate and the front plate and the rear plate form a plane positioning with the plate surface of one side of the connecting seat facing the positioning plate, and the positioning plate positioning pin is inserted into the connecting seat positioning hole to form a pin positioning, and then the connecting seat and the positioning plate are connected and fastened by inserting the positioning plate screw 6 into the positioning plate screw hole 57.

[0071] In addition, a positioning plate groove 56 can be set at the top of one side plate of the positioning plate, and correspondingly, a connecting seat groove 34 can be set at the top of the connecting seat. The positioning plate groove 56 and the connecting seat groove 34 (i.e., the above-mentioned two left and right U-shaped grooves) are used to accommodate the left and right connecting plate cylindrical pins 121 on the connecting plate to limit the position of the connecting plate relative to the frame in the front and rear directions, but do not affect the front and rear swinging of the connecting plate.

[0072] When the frame is mounted on the traveling box, the connecting seat and the outer wall of the traveling box fit together to form a plane positioning, the pin structure protruding on the outer wall of the traveling box and the connecting seat mounting hole 35 on the side plate of the connecting seat facing the traveling box are inserted to form a pin positioning, and then the connecting seat is connected and fastened to the traveling box by the connecting seat screw 4. The connecting seat mounting hole 35 set on the connecting seat and the screw hole for installing the connecting seat screw 4 constitute the traveling box connection interface structure.

Claims

1. A rolling auxiliary force-bearing mechanism, characterized in that: The utility model comprises a lifting device, a roller device and a frame. The frame is a cylindrical structure which is passed through from top to bottom. The lifting device comprises a cylinder, an end cover, a piston rod, a piston and a connecting plate. A cylindrical convex shaft extending outward is provided on the outer wall of the cylinder near the lower edge. The end cover is fixed to the upper open end of the cylinder and closes the cylinder. The piston is fixedly connected to the lower end of the piston rod. The piston rod passes through the end cover and slides up and down with the end cover. At the same time, the piston slides up and down with the cylinder. An exhaust passage connecting the inside and outside of the cylinder is provided on the side wall of the cylinder near the lower edge. The piston divides the internal space of the cylinder into an upper hydraulic chamber. and the atmospheric cavity below, the connecting plate is strip-shaped, the connecting plate is extended along the left-right direction, the middle part of the connecting plate is horizontally fixed to the upper end of the piston rod, the left and right ends of the connecting plate are respectively provided with connecting plate cylindrical pins cantilevered to the left and right directions, the top surface of the frame is provided with left and right U-shaped grooves, the connecting plate cylindrical pins are correspondingly installed in the U-shaped grooves, most of the cylinder is located in the frame, and a gap is left between the cylinder and the frame, the convex shaft is located outside the frame and extends to the front of the frame, the upper part of the roller device is hinged on the convex shaft, and the middle and lower parts of the roller device are provided with an upper, middle and lower three-sided surrounding structure with an opening facing backwards.

2. The rolling auxiliary force-bearing mechanism according to claim 1, characterized in that: The roller device comprises a vertical plate and a roller, the upper part of the vertical plate is provided with a connecting hole that passes through the front and back, the vertical plate is hinged on the convex shaft through the connecting hole, an upper beam body protruding backwards is provided at the middle and upper part of the rear side plate surface of the vertical plate and below the connecting hole, and a guide body protruding backwards is provided at the lower part of the rear side plate surface of the vertical plate, and a plurality of roller mounting holes arranged at intervals left and right are opened on the guide body, the axis of the roller mounting hole extends horizontally front and back, and the top and bottom of the roller mounting hole are respectively set as a top notch and a bottom notch that pass through the front and back, and there is a roller in each roller mounting hole, and the roller is mounted on the vertical plate, and a gap is maintained between the roller and the roller mounting hole, and the highest point of the roller is higher than the top surface of the guide body, and the upper beam body, the roller and the vertical plate part located between the upper beam body and the guide body form an upper, middle and lower three-sided surrounding structure with the opening facing backwards.

3. The rolling auxiliary force-bearing mechanism according to claim 2, characterized in that: An up-and-down sliding guide structure is arranged between the cylinder and the frame on the left and right sides.

4. The rolling auxiliary force-bearing mechanism according to claim 3, characterized in that: The up-and-down sliding guide structure comprises a vertically extending cylindrical pin arranged at the upper middle portion of the outer wall of the cylinder and a frame slide groove arranged at the lower middle portion of the inner wall of the frame, wherein the frame slide groove is a non-through groove extending up and down.

5. The rolling auxiliary force-bearing mechanism according to claim 2, 3 or 4, characterized in that: One or more adjusting rings are sleeved on the convex shaft, a nut is screwed on the end of the convex shaft, and the vertical plate is sleeved on the convex shaft and located between the nut and the adjusting ring.

6. The rolling auxiliary force-bearing mechanism according to claim 5, characterized in that: The lower surface of the upper beam body is provided with an upper beam body wear-resistant layer, the top surface of the guide body is provided with a guide body wear-resistant layer, and the rear side plate surface of the vertical plate part located between the upper beam body and the guide body is provided with a vertical plate wear-resistant layer.

7. The rolling auxiliary force-bearing mechanism according to claim 6, characterized in that: The surface of the roller is provided with a plurality of anti-skid grooves, which extend along the axial direction of the roller and are front-to-back through grooves.

8. The rolling auxiliary force-bearing mechanism according to claim 7, characterized in that: A plurality of pins are fixed to the lower part of the vertical plate, and the pins correspond to the rollers one by one. The axis of the pins extends horizontally front and back, and the rear of the pins is exposed in the roller mounting hole. The roller is rotatably supported on the rear journal of the pin through a roller group. A positioning cover is installed in the inner hole of the roller and behind the roller group. The positioning cover is fixed on the pin and limits the roller group axially.

9. The rolling auxiliary force-bearing mechanism according to claim 8, characterized in that: An oil injection channel is provided in the pin shaft, the inlet of the oil injection channel is opened on the exposed surface of the front part of the pin shaft and is installed with an oil injection nozzle, the outlet of the oil injection channel is opened on the rear journal of the pin shaft and is located between adjacent roller groups in the axial direction of the pin shaft, and a seal is provided between the positioning cover and the roller.

10. The rolling auxiliary force-bearing mechanism according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, characterized in that: The frame includes a connecting seat and a positioning plate. The positioning plate is a C-shaped structure with one side open, which is formed by a front plate, a side plate and a rear plate arranged in sequence. The connecting seat is installed on the open side of the positioning plate, so that the frame becomes a cylindrical structure with a rectangular cross-section, and the cross-section of the cylinder is rectangular.

11. The rolling auxiliary force-bearing mechanism according to claim 4, 5, 6, 7, 8 or 9, characterized in that: The frame includes a connecting seat and a positioning plate. The positioning plate is a C-shaped structure with an open side formed by a front plate, a side plate and a rear plate arranged in sequence. The connecting seat is installed on the open side of the positioning plate, so that the frame becomes a cylindrical structure with a rectangular cross-section. One of the frame slide grooves is arranged on the inner wall of the side plate of the positioning plate, and the other is arranged on the side plate surface of the connecting seat facing the positioning plate. The cross-section of the cylinder is rectangular, the convex shaft is arranged on the front outer wall of the cylinder, and the cylindrical pin of the cylinder is arranged on the left and right outer walls of the cylinder.

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