Bolt dismounting and mounting system for narrow and small space

Abstract

The invention discloses a bolt dismounting and mounting system for a narrow space. The bolt dismounting and mounting system comprises a bolt sleeve, a moving device, a lifting device, a transmission device and a power device, the lifting device is used for lifting the bolt sleeve and extending the bolt sleeve into the narrow space, so that the bolt sleeve is connected into a to-be-disassembled bolt and pressure is applied to the to-be-disassembled bolt; the power device is used for providing torque; the transmission device is used for transmitting torque provided by the power device to the bolt sleeve. The lifting device vertically moves through a labor-saving force arm in the height direction, so that a bolt sleeve is conveniently connected into a bolt in a narrow space and applies pressure to the bolt, and the lifting device adapts to the working condition that the space between wheels is insufficient; through the combination of the constant velocity universal joint and the spline housing, the pneumatic hammer is better in compatibility, the whole system structure can be lower in height, movement in a narrow working condition environment is facilitated, a bevel gear or a worm shaft worm is adopted for right-angle reversing for speed reduction and torque increase, the height of the whole system is saved, the gravity center is lowered, the gravity center is made to be back, and operation stability is facilitated.

Description

Technical Field

[0001] The invention patent relates to the field of vehicle maintenance technology, and in particular to a bolt disassembly and assembly system for use in a narrow space. Background Art

[0002] The U-bolts of the rear axle leaf springs of the vehicle are passed down, and the nuts are fixed at the balance shaft. The structural strength is higher and does not affect the movable gap with the beam. However, the disadvantage is that there is insufficient space for disassembly and assembly, and the air cannon is inconvenient to use during disassembly and assembly. The surrounding tires need to be removed, which is laborious, time-consuming and expensive. Frequent disassembly and assembly will cause damage to the tire bolts. The maintenance cycle and cost are relatively inferior to the top-through type, which uses the gravity of the air cannon to move downward from the top. In terms of labor saving, convenience, speed and no need to remove tires, the market share of vehicles with U-bolts passing down is large, which brings about large maintenance costs and reduces customer operation rates. The existing technology is limited to solving the labor-saving solution of lifting the air cannon longitudinally when operating the air cannon horizontally, but the U-bolts passing down are difficult to operate from the bottom up to disassemble and install the bolts of the air cannon, and there is no good technical solution. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a bolt disassembly and assembly system for a narrow space. The vertical holding mechanism, the universal lever mechanism and the telescopic handle are used to solve the problem that it is difficult to control the air cannon from bottom to top to disassemble and install the bolts when the U-bolt is passed through, and the present invention has many adjustment functions, adaptation functions and a labor-saving structure.

[0004] In order to solve the problems of the prior art, the present invention discloses a bolt disassembly and assembly system for a narrow space, comprising: a bolt sleeve, a moving device, and a lifting device, a transmission device and a power device arranged on the moving device; The lifting device is used to lift the bolt sleeve and extend it into a narrow space, so that the bolt sleeve can be connected to the bolt to be disassembled and installed, and to apply pressure to the bolt to be disassembled and installed; One end of the transmission device is connected to the bolt sleeve, and the other end is connected to the power device; the power device is used to provide torque; and the transmission device is used to transmit the torque provided by the power device to the bolt sleeve.

[0005] Furthermore, the transmission device includes: a sleeve extension rod, a sleeve head universal joint, a spline sleeve, a spline shaft, a right-angle reversing transmission mechanism and a transmission shaft assembly; the middle part of the transmission shaft assembly is a transmission shaft, and constant velocity universal joints are respectively provided at both ends, wherein the constant velocity universal joint at one end is connected to the output shaft of the power device, and the constant velocity universal joint at the other end is connected to the spline shaft through the right-angle reversing transmission mechanism; the spline shaft is connected to the spline sleeve, and a space is provided inside the spline sleeve for the spline shaft to expand and contract; the spline sleeve is connected to the sleeve extension rod through the sleeve head universal joint, and the sleeve extension rod is connected to the bolt sleeve.

[0006] Furthermore, the right-angle reversing transmission mechanism is a 90-degree hinged bevel gear set.

[0007] Furthermore, the lifting device includes: an outer lifting sleeve, a telescopic pressure rod, a pressure rod supporting shaft, a pressure rod main support seat and a sleeve base; the sleeve base is arranged on the moving device, and the outer wall of the outer lifting sleeve is slidingly connected to the inner wall of the sleeve base; the spline sleeve is arranged inside the outer lifting sleeve, and the spline sleeve is rotatably connected to the outer lifting sleeve, and a limiting structure is provided inside the outer lifting sleeve that can make the spline sleeve rise and fall with the outer lifting sleeve; one end of the telescopic pressure rod is rotatably connected to the outer lifting sleeve, and the middle part is connected to the pressure rod main support seat through the pressure rod supporting shaft.

[0008] Furthermore, it also includes a bracket, on which a first position adjustment locking mechanism is provided. The bracket is used to lock the telescopic pressure rod through the first position adjustment locking mechanism after the lifting device lifts the bolt sleeve to a specified height.

[0009] Furthermore, the first position adjustment locking mechanism includes: a locating pin pull ring, a locating pin pull ring hole, a locating pin rod, a locating pin reset spring, a locating pin outer cover, a locating pin reset spring baffle, a locating pin locking pin, a movable part locking hole, an outer cover locking pin hole, a movable part and an outer cover; a locating pin pull ring is provided at one end of the locating pin rod through the locating pin pull ring hole, and a locating pin locking pin is provided at the other end, and a locating pin reset spring and a locating pin reset spring baffle are provided in the middle section; the locating pin outer cover is connected to the outer cover, the inner side of the locating pin outer cover abuts the locating pin reset spring, and outer cover locking pin holes are provided at corresponding positions of the outer cover and the locating pin lock pin; the movable part is provided with a plurality of movable part locking holes.

[0010] Furthermore, the telescopic pressure rod body is a straight portion, and the end portion is a bent portion, the straight portion is provided with a first handle cover, the bent portion is provided with a second handle cover, and the end portion of the bent portion is provided with a T-shaped handle.

[0011] Furthermore, the mobile device includes a front wheel, a base and a steering tail wheel; the lifting device, transmission device and power device are all arranged on the base, the front wheel is arranged at the front end of the bottom of the base, and the steering tail wheel is arranged at the rear end of the bottom of the base.

[0012] Furthermore, it also includes a base extension plate, a front wheel reversing positioning pin, a front wheel base and a front wheel base rotating shaft; the base extension plate is arranged at the front end of the base, the front wheel base is installed at the front end of the bottom of the base through the front wheel base rotating shaft, and the front wheel is installed on the front wheel base; the front wheel reversing positioning pin is arranged on the front wheel.

[0013] Furthermore, the power device is a pneumatic gun.

[0014] The present invention has the beneficial effects: The present invention adopts a labor-saving lever arm to move vertically in the height direction through the lifting device, which is convenient for connecting the bolt sleeve to the bolt in a narrow space and applying pressure to it, and adapts to the working condition of insufficient space between wheels; when disassembling and assembling the bolt, the staff does not need to bear the weight of the air cannon itself on the one hand, and on the other hand, by utilizing the lever principle, the longer the telescopic pressure rod is, the less effort it takes to press down, thereby reducing the force of the staff when applying pressure to the bolt, and providing a labor-saving bolt disassembly and assembly system; the bolt sleeve model and the sleeve extension rod can be replaced as needed, and the universal joint with the sleeve extension rod can be adapted to different angles; the handle has a rubber sleeve, and can be adjusted in two ways: near-front adjustment and far-body adjustment; through the combination of a constant velocity universal joint and a spline sleeve, the air cannon fixing mechanism is adjustable, making the air cannon more compatible, and the structural height of the entire system can be lower, which is convenient for moving in a narrow working environment; the right-angle reversing adopts bevel gears or worm shafts to reduce speed and increase torque, and saves the height of the entire system, lowers the center of gravity, and moves the center of gravity backward to facilitate operational stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the extended sleeve extension rod of the present invention; Figure 3 It is a schematic diagram of the structure of the position adjustment locking mechanism in the present invention; Figure 4 This is a diagram of the front wheel dual position adjustment and center of gravity and force analysis of the present invention; Figure 5 This is a top view of the dual front wheels and the retracted position of the pressure rod of the present invention; Figure 6 A top view of the position of the U-bolt removal operation in the tire group gap of the present invention; Figure 7 A schematic diagram of the holding posture and holding points for close-range alignment and adjustment using the present invention; Figure 8 A schematic diagram of the remote adjustment of angle, front and rear direction and downward pressing operation using the present invention; Fig. 9 It is a top view schematic diagram of the relationship between the adjustment arm and the adjustment accuracy.

[0016] Reference numerals: 1. Bolt sleeve; 2. Sleeve extension rod; 3. Sleeve head universal joint; 4. Splined shaft sleeve; 5. External lifting sleeve; 6. Splined shaft; 7. Right-angle reversing transmission mechanism; 8. Base extension plate; 9. Front wheel reversing positioning pin; 10. Front wheel; 11. Base; 12. Pneumatic gun; 13. Steering tail wheel; 14. Tail wheel deflection seat; 15. First fixing mechanism; 16. Position adjustment locking mechanism; 17. Bending part; 18. Pressure rod support shaft; 19. Pressure rod main support seat; 20. Bracket; 21. First handle cover; 22. Pressure rod positioning pin; 23. Second handle cover; 24. T-handle; 25. Extended sleeve extension rod; 26. Guide rail upper pin; 27. Guide rail assembly; 28. Front wheel base; 29. ​​Front wheel base shaft; 30. Sleeve base; 31. Drive shaft assembly; 32. Output shaft; 33. Second fixing mechanism; 34. Straight portion; 35. Telescopic pressure rod; 36. Positioning pin pull ring; 37. Positioning pin pull ring hole; 38. Positioning pin rod; 39. Positioning pin return spring; 40. Positioning pin outer cover; 41. Positioning pin return spring baffle; 42. Positioning pin lock pin; 43. Movable part locking hole; 44. Outer set locking pin hole; 45. Movable part; 46. Outer set. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] Example 1: Figure 1 As shown, this embodiment provides a bolt disassembly and assembly system for a narrow space, comprising: a bolt sleeve 1, a moving device, and a lifting device, a transmission device and a power device arranged on the moving device; the bolt sleeve 1 can be replaced with a corresponding model and a corresponding inner cavity length according to the bolt specification and the exposed length of the screw rod; The lifting device is used to lift the bolt sleeve 1 and extend it into a narrow space, so that the bolt sleeve 1 can be connected to the bolt to be disassembled and assembled, and pressure can be applied to the bolt to be disassembled and assembled; it includes: an outer lifting sleeve 5, a telescopic pressure rod 35, a pressure rod support shaft 18, a pressure rod main support seat 19 and a sleeve base 30; the sleeve base 30 is arranged on the moving device, and the outer wall of the outer lifting sleeve 5 is slidably connected to the inner wall of the sleeve base 30; the spline sleeve 4 is arranged inside the outer lifting sleeve 5, and the spline sleeve 4 is rotatably connected to the outer lifting sleeve 5, and a limiting structure is provided inside the outer lifting sleeve 5 that can make the spline sleeve 4 rise and fall with the outer lifting sleeve 5; one end of the telescopic pressure rod 35 is rotatably connected to the outer lifting sleeve 5, and the middle part is connected to the pressure rod main support seat 19 through the pressure rod support shaft 18. The bracket 20 is also included. The bracket 20 is provided with a position adjustment locking mechanism 16. The bracket 20 is used to lock the telescopic pressure rod 35 through the position adjustment locking mechanism 16 after the lifting device lifts the bolt sleeve 1 to a specified height. The telescopic pressure rod 35 is mainly a straight portion 34, and the end is a bent portion 17. The straight portion 34 is provided with a first handle glove 21, the bent portion is provided with a second handle glove 23, and the end of the bent portion is provided with a T-shaped handle 24. The first handle glove 21, the second handle glove 23, and the T-shaped handle 24 are all made of rubber.

[0019] One end of the transmission device is connected to the bolt sleeve 1, and the other end is connected to the power device; the power device is used to provide torque; the transmission device is used to transmit the torque provided by the power device to the bolt sleeve 1, and the power device preferably adopts a pneumatic gun 12.

[0020] The transmission device comprises: a sleeve extension rod 2, a sleeve head universal joint 3, a spline shaft sleeve 4, a spline shaft 6, a right-angle reversing transmission mechanism 7 and a transmission shaft assembly 31; the middle part of the transmission shaft assembly 31 is a transmission shaft, and constant velocity universal joints are respectively provided at both ends, wherein the constant velocity universal joint at one end is connected to the output shaft 32 of the power device, and the constant velocity universal joint at the other end is connected to the spline shaft 6 through the right-angle reversing transmission mechanism 7; the spline shaft 6 is connected to the spline shaft sleeve 4, and the interior of the spline shaft sleeve 4 is provided with a space for the spline shaft 6 to expand and contract; the spline shaft sleeve 4 is connected to the sleeve extension rod 2 through the sleeve head universal joint 3, and the sleeve extension rod 2 is connected to the bolt sleeve 1. The right-angle reversing transmission mechanism 7 is a 90-degree hinged bevel gear set.

[0021] The mobile device includes a front wheel 10, a base 11 and a steering tail wheel 13; the lifting device, transmission device and power device are all arranged on the base 11, the front wheel 10 is arranged at the front end of the bottom of the base 11, and the steering tail wheel 13 is arranged at the rear end of the bottom of the base 11. It also includes a base extension plate 8, a front wheel reversing positioning pin 9, a front wheel base 28 and a front wheel base rotating shaft 29; the base extension plate 8 is arranged at the front end of the base 11, the front wheel base 28 is installed at the front end of the bottom of the base 11 through the front wheel base rotating shaft 29, and the front wheel 10 is installed on the front wheel base 28; the front wheel reversing positioning pin 9 is arranged on the front wheel 10; the front wheel base 28 can rotate forward and backward through the front wheel base rotating shaft 29 and realize positioning and locking at the corresponding position by relying on the front wheel reversing positioning pin 9. When it is in the front position, it is fixed by relying on the base extension plate 8, and the base extension plate 8 has a triangular reinforcement rib for fixing the front wheel 11 when it is changed to the front position. The steering tail wheel 13 and its tail wheel deflection seat 14 realize the steering and position adjustment of the entire system.

[0022] like Figure 1-Figure 2 As shown, the working principle of the bolt disassembly and assembly system for a narrow space provided in this embodiment is as follows: Select the corresponding bolt sleeve 1 according to the required bolt specifications and the exposed screw length, and select and install the corresponding sleeve extension rod 2 according to the height of the downward U-bolt from the ground, to ensure that when the telescopic pressure rod 35 is pressed down, the bolt sleeve 1 is lifted enough to reach the bolt to be removed, and when the telescopic pressure rod 35 is loosened and lifted, the bolt sleeve 1 drops, leaving enough space, and the gap is large enough for a person to easily enter and take out the removed bolt in the bolt sleeve 1.

[0023] The sleeve extension rod 2 is installed on the top of the spline sleeve 4. There is a sleeve head universal joint 3 between the top of the spline sleeve 4 and the sleeve extension rod 2, which can be tilted at a certain angle. It is used to adapt to the uneven ground or the inconsistency between the sleeve axis and the screw axis caused by the angle of the removed bolt. The bolt can be adjusted and aligned by hand. The length of the sleeve extension rod 2 can be replaced in multiple styles according to needs. The effect of the extended sleeve extension rod 25 is as follows Figure 2 shown.

[0024] The outside of the spline sleeve 4 is wrapped with an external lifting sleeve 5 which serves as a height adjustment. The spline sleeve 4 is allowed to rotate freely and move with it in the vertical direction. The center of the spline sleeve 4 is a matching spline shaft 6 which has a constant height and only rotates axially. The external lifting sleeve 5 realizes vertical sliding freedom relative to the spline shaft 6, realizes raising and lowering the height, and the spline sleeve is driven to rotate by the spline shaft 6.

[0025] The outer lifting sleeve 5 is provided with two sets of guide tenons, which are used to connect two points into a straight line to ensure the vertical upward and downward movement of the vertical guide rail limit path on the side of the sleeve base 30. The two ends of the guide rail are respectively provided with a guide rail upper pin 26 and a guide rail lower pin 27 for limiting the vertical movement path of the outer lifting sleeve 5; and the front end of the telescopic pressure rod 35 has a connecting hole with a compatible slide groove connected to the outer lifting sleeve 5, and a set of guide tenons are provided, which convert the vertical arc movement of the telescopic pressure rod 35 pressed up and down into a linear vertical movement of the outer lifting sleeve 5, and the horizontal movement brought by the arc movement of the telescopic pressure rod 35 is matched and adapted through the compatible slide groove.

[0026] The right-angle reversing transmission mechanism 7 is a 90-degree hinged bevel gear set, including the bevel gear at the bottom of the spline shaft 6 and the bevel gear at the end of the transverse shaft connected to the front end of the constant velocity universal joint of the transmission shaft assembly 31. The speed ratio of the two bevel gears can be designed as required. When only the rotation direction needs to be changed at a constant speed, a 1:1 speed ratio is used. When the torque needs to be increased, it is designed as a deceleration and torque-increasing speed ratio with a large number of bevel gears at the end of the vertical shaft and a small number of bevel gears at the transverse shaft, and the bevel gear set can be flexibly replaced as required. At the same time, it can also be designed as a worm gear reversing deceleration and torque-increasing structure to further increase the torque, wherein a worm gear is installed at the end of the vertical shaft and a worm is installed at the end of the transverse shaft. The speed ratio is designed as required and a worm gear combination with other speed ratios can be replaced as required.

[0027] The transmission shaft assembly 31 connects and matches the bevel gear horizontal axis at the front end and the output shaft 32 of the air cannon 12 at the rear end, achieving compatibility with the size and angle deviations caused by non-coaxiality in the height and left and right directions, and can also be used to adapt to air cannons of different brands and sizes. At the same time, the transition shaft between the two constant velocity joints of the transmission shaft assembly 31 is also a spline shaft 6, which can be freely telescopically adjusted along the axial direction and transmit the rotational torque and speed around the axial direction.

[0028] The air cannon 12 is firmly fixed to the upper rear section of the base 11 by means of the second fixing mechanism 33 and the first fixing mechanism 15, and the shape and size of the front and rear fixing mechanisms can be adapted according to different brands, specifications, models and sizes.

[0029] Near the constant velocity universal joint, there is a main support seat 19 of the pressure rod across the universal joint and the spline shaft 6, and there is a pressure rod support shaft 18 at the top of the support. With the support shaft 18 as the center, the telescopic pressure rod 35 is divided into two sections, the front section is short and the rear section is long, and the two sections are similar triangles. The ratio of the vertical lifting change height of the front end to the height pressing amount of the rear section hand grip is equal to the ratio of the length of the front section to the length of the rear section to the hand grip point, that is, the farther the hand grip point is from the pressure rod support shaft 18, the greater the vertical movement distance of the hand required to lift the bolt sleeve 1 by the same distance, that is, the higher the adjustment accuracy, the easier it is to adjust accurately and the easier it is to save effort. However, the larger the operating stroke, the slower the operating speed, the larger the required hand movement range, and the more activities and larger movement range will be brought. There are three basic gripping positions for the hand, namely the first grip 21 and the second grip 23, and the T-shaped handle 24. The telescopic pressure rod 35 can flexibly adjust the telescopic amount by adjusting the pressure rod positioning pin 22 to control the distance between the gripping points of the rear second handle 23 and the T-shaped handle 24 and the pressure rod supporting shaft 18 .

[0030] Example 2: Figure 3 As shown, based on the concept of embodiment 1, the brackets 20 straddling on both sides of the jackhammer 12 are provided with a height-adjustable limit pin, i.e., a position adjustment locking mechanism 16. The limit pin can adjust the height travel range of the rear section of the pressure rod, or locate its position.

[0031] The position adjustment locking mechanism 16 includes: a positioning pin pull ring 36, a positioning pin pull ring hole 37, a positioning pin rod 38, a positioning pin return spring 39, a positioning pin outer cover 40, a positioning pin return spring baffle 41, a positioning pin lock pin 42, a movable part locking hole 43, an outer cover locking pin hole 44, a movable part 45 and an outer cover 46; one end of the positioning pin rod 38 is provided with a positioning pin pull ring 36 through the positioning pin pull ring hole 37, and the other end is a positioning pin lock pin 42, and the middle section is provided with abutting positioning pin return spring 39 and positioning pin return spring baffle 41; the positioning pin outer cover 40 is connected to the outer cover 46, the inner side of the positioning pin outer cover 40 abuts the positioning pin return spring 39, and the outer cover locking pin hole 44 is provided at the corresponding position of the outer cover 46 and the positioning pin lock pin 42; the movable part 45 is provided with a plurality of movable part locking holes 43.

[0032] When the position needs to be adjusted, the positioning pin pull ring 36 is lifted, and the positioning pin rod 38 is lifted to compress the positioning pin reset spring 39, which is compressed between the positioning pin cover 40 and the positioning pin reset spring baffle 41, and is lifted to a sufficient height so that the positioning pin lock pin 42 is pulled out of the movable part locking hole 43, and is in the outer set locking pin hole 44 or is also pulled out, so that the movable part 45 is in an unlocked state and can freely extend and slide in the middle of the outer set 46. After the position adjustment is completed, the positioning pin pull ring 36 is released, and under the action of the positioning pin reset spring 39, the positioning pin lock pin 42 is inserted into the outer set locking pin hole 44 and the movable part locking hole 43 at the corresponding position, completing the locking of the movable part 45 and the outer set 46.

[0033] Example 3: Figure 4 As shown, this embodiment provides the front wheel dual-position adjustment and center of gravity and force analysis of the system described in Example 1: after the bolt sleeve 1 moves up in the direction of arrow A to press against the nut to be removed, it is urgently necessary to apply pressure upward to tighten it. The nut is pressed downward to apply force to the equipment downward along the direction of arrow B, and the center of gravity of the entire set of equipment is downward along arrow E. At this time, the front two wheels are viewed as a fulcrum from the side view, and the ground provides an upward support force through the front and rear wheels, which balances the downward gravity and nut force, wherein the rear wheel position remains unchanged and moves upward along the direction of arrow F. When the front wheel 11 is placed at the front end, the supporting force is upward along the arrow C. At this time, the center of gravity and the bolt sleeve force are between the front and rear wheel supporting forces, which is the most stable. When the front wheel 11 is placed at the rear end, the supporting force is upward along the arrow D. At this time, the force of the bolt sleeve is in front of the two wheels, and the stability is slightly lower, but the front size is shorter.

[0034] The top view of the system removing the U-bolt in the gap between the tires is shown below. Figure 6 As shown, the air cannon system is placed using the smaller gap between the wheels and the approximately triangular space at the bottom between the two circles of the tires, and can be tilted and adjusted to ensure effective operation of the disassembled bolts.

[0035] like Figure 7 The figure shows the schematic diagram of bolt alignment and position adjustment during close-range operation, which is divided into the rear hand front grip position and the rear hand rear grip position. It is conducive to adjusting the precise position at close range and aligning the bolt sleeve with the removed nut accurately and quickly.

[0036] like Figure 8 The figure shows a schematic diagram of the remote adjustment angle, front and rear direction and downward pressing operation, which is convenient for forward movement, downward pressing and wide range adjustment.

[0037] like Fig. 9 Shown is the analysis of movement adjustment when the front wheel is at the front end, rear end and exactly at the position of the bolt sleeve axis.

[0038] in Fig. 9 Figure A shows the front wheel at the rear, Figure B shows the front wheel at the front, and Figure C shows the front wheel at the center line of the bolt sleeve.

[0039] In mode A, from a top view perspective, hold the T-handle and rotate it to the right by a distance of X4. With the centers of the two front wheels as the center of the circle for adjusting the rotational movement, the bolt sleeve will shift to the left by a distance of X1, X1 / L1=X4 / L2+L3+L4. That is, the adjustment amount obtained by moving the same distance X4 is X1=X4*L1 / L2+L3+L4.

[0040] In mode B, from a top view perspective, hold the T-handle and rotate it to the right a distance of X4. With the centers of the two front wheels as the center of the circle for adjusting the rotational movement, the bolt sleeve will shift to the right a distance of X5, X5 / L1=X4 / L1+L5+L3+L4, and L5=L1+L2, that is, the adjustment amount obtained by moving the same distance X4 is X5=X4*L1 / 2*L1+L2+L3+L4, that is, X5<X1.

[0041] In mode C, from a top view perspective, hold the T-shaped handle and rotate it to the right by a distance of X4. The center of the rotation is adjusted using the center of the two front wheels. The bolt sleeve rotates in place and cannot be offset. There is no left and right adjustment amount. Adjustment can only be achieved by rotation + forward and backward movement, which is extremely inconvenient and is the worst solution.

[0042] Solution A is faster to adjust, which means Solution B is more precise, and Solution C is the most complicated to adjust. Different holding positions correspond to different lengths of the rear section of the shaft. The further back the hand is held or the longer the adjustment length of the pressure rod is, the smaller the adjustment amount obtained by moving the same distance X4, that is, the more precise the adjustment. The closer the hand is held or the shorter the pressure rod is, the larger the adjustment amount obtained by moving the same distance X4, that is, the faster the adjustment.

[0043] After pressing the pressure rod by hand, the bolt sleeve is lifted up: the lifting amount > the bolt amount + the hand operation amount, that is, after supporting the nut to be removed, the thread stroke required to remove it + the hand operation space height required to remove the nut from the center of the fallen bolt sleeve without moving the jackhammer assembly.

[0044] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. At the same time, in the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. And in the drawings of the present invention, the filling pattern is only to distinguish the layers, without any other limitation.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt disassembly and assembly system for a narrow space, characterized in that: include: A bolt sleeve (1), a moving device, and a lifting device, a transmission device and a power device arranged on the moving device; The lifting device is used to lift the bolt sleeve (1) and extend it into a narrow space, so that the bolt sleeve (1) is connected to the bolt to be disassembled and installed, and to apply pressure to the bolt to be disassembled and installed; One end of the transmission device is connected to the bolt sleeve (1), and the other end is connected to the power device; the power device is used to provide torque; and the transmission device is used to transmit the torque provided by the power device to the bolt sleeve (1).

2. The bolt disassembly and assembly system for a narrow space according to claim 1, characterized in that: The transmission device comprises: a sleeve extension rod (2), a sleeve head universal joint (3), a spline shaft sleeve (4), a spline shaft (6), a right-angle reversing transmission mechanism (7) and a transmission shaft assembly (31); the middle part of the transmission shaft assembly (31) is a transmission shaft, and constant velocity universal joints are respectively provided at both ends, wherein the constant velocity universal joint at one end is connected to the output shaft (32) of the power device, and the constant velocity universal joint at the other end is connected to the spline shaft (6) through the right-angle reversing transmission mechanism (7); the spline shaft (6) is connected to the spline shaft sleeve (4), and a space for the spline shaft (6) to be extended and retracted is provided inside the spline shaft sleeve (4); the spline shaft sleeve (4) is connected to the sleeve extension rod (2) through the sleeve head universal joint (3), and the sleeve extension rod (2) is connected to the bolt sleeve (1).

3. The bolt disassembly and assembly system for a narrow space according to claim 2, characterized in that: The right-angle reversing transmission mechanism (7) is a 90-degree hinged bevel gear set.

4. The bolt disassembly and assembly system for a narrow space according to claim 2, characterized in that: The lifting device comprises: an outer lifting sleeve (5), a telescopic pressure rod (35), a pressure rod support shaft (18), a pressure rod main support seat (19) and a sleeve base (30); the sleeve base (30) is arranged on the moving device, and the outer wall of the outer lifting sleeve (5) is slidably connected to the inner wall of the sleeve base (30); the spline shaft sleeve (4) is arranged inside the outer lifting sleeve (5), the spline shaft sleeve (4) is rotatably connected to the outer lifting sleeve (5), and a limiting structure capable of enabling the spline shaft sleeve (4) to rise and fall with the outer lifting sleeve (5) is provided inside the outer lifting sleeve (5); one end of the telescopic pressure rod (35) is rotatably connected to the outer lifting sleeve (5), and the middle part is connected to the pressure rod main support seat (19) through the pressure rod support shaft (18).

5. The bolt disassembly and assembly system for a narrow space according to claim 4, characterized in that: It also includes a bracket (20), on which a position adjustment locking mechanism (16) is provided. The bracket (20) is used to lock the telescopic pressure rod (35) through the position adjustment locking mechanism (16) after the lifting device lifts the bolt sleeve (1) to a specified height.

6. The bolt disassembly and assembly system for a narrow space according to claim 4, characterized in that: The position adjustment locking mechanism (16) comprises: a positioning pin pull ring (36), a positioning pin pull ring hole (37), a positioning pin rod (38), a positioning pin return spring (39), a positioning pin outer cover (40), a positioning pin return spring baffle (41), a positioning pin lock pin (42), a movable part locking hole (43), an outer sleeve locking pin hole (44), a movable part (45) and an outer sleeve (46); one end of the positioning pin rod (38) is provided with a positioning pin pull ring through the positioning pin pull ring hole (37). (36), the other end of which is a positioning pin lock pin (42), and the middle section is provided with a positioning pin return spring (39) and a positioning pin return spring baffle (41) that abut against each other; the positioning pin outer cover (40) is connected to the outer set (46), the inner side of the positioning pin outer cover (40) abuts against the positioning pin return spring (39), and the outer set lock pin hole (44) is provided at the corresponding position of the outer set (46) and the positioning pin lock pin (42); the movable member (45) is provided with a plurality of movable member locking holes (43).

7. The bolt disassembly and assembly system for a narrow space according to claim 4, characterized in that: The telescopic pressure rod (35) has a main body of a straight portion (34) and an end portion of a bent portion (17). The straight portion (34) is provided with a first handle cover (21), the bent portion is provided with a second handle cover (23), and the end portion of the bent portion is provided with a T-shaped handle (24).

8. The bolt disassembly and assembly system for a narrow space according to claim 1, characterized in that: The mobile device comprises a front wheel (10), a base (11) and a steering tail wheel (13); the lifting device, the transmission device and the power device are all arranged on the base (11); the front wheel (10) is arranged at the front end of the bottom of the base (11); and the steering tail wheel (13) is arranged at the rear end of the bottom of the base (11).

9. The bolt disassembly and assembly system for narrow space according to claim 8, characterized in that: The invention also comprises a base extension plate (8), a front wheel reversing positioning pin (9), a front wheel base (28) and a front wheel base rotating shaft (29); the base extension plate (8) is arranged at the front end of the base (11); the front wheel base (28) is installed at the front end of the bottom of the base (11) via the front wheel base rotating shaft (29); the front wheel (10) is installed on the front wheel base (28); and the front wheel reversing positioning pin (9) is arranged on the front wheel (10).

10. The bolt disassembly and assembly system for a narrow space according to claim 1, characterized in that: The power device is a wind gun (12).

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