Stepping telescopic mechanical self-locking hydraulic integrated work box and use method

Abstract

The invention discloses a stepping telescopic mechanical self-locking type hydraulic integrated work box and a using method, and relates to the technical field of hydraulic locking. Comprising a bottom frame, a mounting cavity is formed in the bottom frame, a hydraulic oil pump assembly is mounted on one side of the mounting cavity, and a battery control assembly is mounted on the other side of the mounting cavity; a supporting seat is mounted at the end part of the bottom frame; a cylinder body of the hydraulic cylinder is mounted in the mounting cavity; a piston rod is mounted in the hydraulic cylinder; a driving motor is mounted on the hydraulic cylinder; the large fluted disc is in threaded connection with the piston rod, and the outside of the large fluted disc is meshed with the pinion; the end of the universal disc is in a ball head shape, the universal disc is detachably connected to the end of the piston rod through an installation locking disc, and the universal disc extends out of the bottom frame and is provided with a connecting disc. The technical problems that an existing hydraulic component and an existing servo component are separated from a hydraulic cylinder, the connecting angle is relatively fixed, and installation at other angles is lacked are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic cylinders, and in particular relates to a step-by-step telescopic mechanical self-locking hydraulic integrated working box and a use method thereof. Background Art

[0002] Hydraulic jacks are widely used in the lifting and support of large equipment, and are of great significance to ensure the safety of lifting construction of large equipment. Because traditional hydraulic jacks need to rely on oil pressure to support heavy objects for a long time during lifting construction, there is a safety risk of sudden failure of the jack causing the load to become unstable, and the lifting process is usually equipped with a mechanical screw jack to protect the top, which consumes a lot of manpower and equipment resources.

[0003] The application number in the reference is CN202221085381.4, an axial force automatic compensation steel support servo device. When the piston moves and drives the locking nut away from the cylinder body, the rotating motor is started to drive the telescopic rod to rotate, and the telescopic rod drives the driving gear to rotate. Through the engagement of the driving gear and the locking nut, the driving gear can drive the locking nut to rotate, and then the locking nut is abutted against the cylinder body to lock the piston, and the telescopic rod can be extended and retracted, thereby achieving the purpose of convenient operation without manually tightening the locking nut after the piston is extended.

[0004] However, most of the existing hydraulic components and servo components are separated from the hydraulic cylinder, which requires external inspection and debugging for installation and commissioning, and requires a large hydraulic oil station for lifting and installation. In addition, most of the end connection components can only go straight up and down, resulting in a relatively fixed connection angle and a lack of angle installation for use in diagonal bracing and other directions.

[0005] In summary, the present invention provides a step-by-step telescopic mechanical self-locking hydraulic integrated working box and a method of using the same. Summary of the invention

[0006] The object of the present invention is to provide a step-by-step telescopic mechanical self-locking hydraulic integrated working box and a method of use, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] Step-by-step telescopic mechanical self-locking hydraulic integrated work box, including:

[0009] A chassis, wherein a mounting cavity is provided in the chassis, a hydraulic oil pump assembly is installed on one side of the mounting cavity, and a battery control assembly is installed on the other side; a support seat is installed at the end of the chassis;

[0010] A hydraulic cylinder, wherein the cylinder body of the hydraulic cylinder is installed in the installation cavity; a piston rod is installed in the hydraulic cylinder, and the output direction of the piston rod is arranged away from the support seat; the hydraulic cylinder includes a gland, and the gland is in the shape of a sleeve;

[0011] A driving motor and a motor bracket, wherein the motor bracket is installed outside the gland, and the driving motor is installed on the motor bracket;

[0012] A large toothed disc, wherein the large toothed disc is provided with external teeth on the outside and internal threads on the inside; the piston rod is provided with external threads, and the large toothed disc is threadedly connected to the piston rod;

[0013] Position gear, the output end of the driving motor is fixedly mounted with a position gear, the position gear is meshed with the large gear plate; the tooth width of the position gear is greater than the tooth width of the external tooth shape;

[0014] The end of the universal disk is in the shape of a ball head and is detachably connected to the end of the piston rod by installing a locking disk. The universal disk extends outside the chassis and is installed with a connecting disk.

[0015] In a further technical solution, the hydraulic cylinder also includes a cylinder body, which is provided with an oil inlet and an oil outlet; one end of the cylinder body is fixedly connected to the base frame, and a volume chamber is provided in the cylinder body, and the end of the piston rod away from the universal plate is installed in the volume chamber; a guide sleeve is installed at the end of the cylinder body, and the guide sleeve is detachably connected to the cylinder body; the rod body of the piston rod is connected to the cylinder body, the guide sleeve, the pressure cover and the large gear plate.

[0016] In a further technical solution, the large toothed disc includes a toothed portion and a fixing ring, the fixing ring is integrally connected to the toothed portion, an external tooth is arranged outside the toothed portion, an internal thread is opened inside the fixing ring, and a fixing ring is arranged on the side of the external tooth opposite to the universal disc.

[0017] In a further technical solution, the chassis includes a frame portion, a compartment box and a bent plate, the compartment box is installed in the bent plate, the compartment box is provided with an opening and is arranged toward a side facing away from the cylinder body;

[0018] The frame part is fixedly connected to the bent plate, and a lifting lug is arranged on the surface;

[0019] The battery control assembly is detachably installed in the compartment box;

[0020] The end of the frame part is detachably mounted with a front closing plate, the front closing plate is provided with a central hole suitable for the universal disk to pass through; the diameter of the central hole is smaller than the diameter of the connecting disk;

[0021] A left cover plate and a right cover plate are detachably mounted on both sides of the base frame. A door plate is provided on the left cover plate, and the door plate is hinged to the left cover plate.

[0022] In a further technical solution, the position gear includes side tooth portions and a middle portion located on both sides, and the width of the middle portion is smaller than the width of the toothed portion;

[0023] The side tooth portion is fixedly connected to the middle portion, and a lubrication cavity and a position cavity are arranged in the middle portion, the lubrication cavity is communicated with the position cavity, a ball is installed in the position cavity, and a position ring is installed outside the ball, the position ring is connected to the outside of the position cavity, and is suitable for limiting the ball from leaving the position cavity;

[0024] The lubricating cavity is filled with lubricant, and cotton felt is also installed in the positioning cavity.

[0025] In a further technical solution, the position gear is mounted on the output end of the drive motor, and the output end of the drive motor is coaxially mounted with a moving rod via a mounting coupling;

[0026] A moving part and a fixed part are respectively installed on one side of the front closing plate opposite to the hydraulic cylinder, the moving rod is installed on the moving part, a transmission gear is installed on the moving rod, and the transmission gear is fixedly connected to the moving rod;

[0027] The fixing part includes a rotating ring gear and a track plate, and the transmission gear is movably connected to the rotating ring gear; a track plate is installed on the rotating ring gear, and a limiting member is installed in the track plate; a limiting ring groove is provided on the universal plate, and the end of the limiting member is suitable for movably abutting in the limiting ring groove.

[0028] In a further technical solution, the moving member includes a position frame, the position frame is detachably connected to the front closing plate, and a square hole is opened on the position frame, and a slide plate 1 is installed in the square hole located on one side of the front closing plate, a connecting bearing is installed in the slide plate 1, the inner ring of the connecting bearing is fixedly connected to one end of the moving rod, and the outer ring of the connecting bearing is connected to the sliding plate;

[0029] The fixing member also includes a fixing cover, which is sleeved on the universal disk and one end of which is detachably connected to the front closing plate, so that an annular portion is fixedly installed on the fixing cover, and the rotary gear ring includes an inner ring, an outer ring and a rolling body; the annular portion is fixedly connected to the inner ring, and the inner ring and the outer ring rotate relatively through the rolling body;

[0030] The outer ring is provided with a connecting column outside and fixedly connected to the track plate, and the outer ring is provided with a tooth shape outside and meshes with the transmission gear;

[0031] A track groove is arranged in the track plate, the limiting member comprises a second slide plate, the second slide plate is installed in the track groove, a telescopic rod is installed on the second slide plate, the telescopic rod comprises an inner straight tube and an outer screw rod, the inner straight tube is threadedly connected with the outer screw rod, and an abutment ball is installed at the end of the outer screw rod;

[0032] The track plates are provided in at least four groups and are circumferentially distributed on the outer ring; arc strips are installed at the ends of the second slide plate and the fixed cover;

[0033] The outer ring is rotated to drive the second slide plate on the track plate to move forward or backward during rotation, and drive the abutment ball to move and abut in the limiting ring groove.

[0034] In a further technical solution, the support seat includes a connecting plate, a cylindrical plate and a supporting rib plate, the connecting plate is provided with a connecting hole, and the connecting plate is fixedly connected to the cylindrical plate; a plurality of supporting rib plates are arranged, and are circumferentially fixedly connected to the outside of the cylindrical plate, and the supporting rib plates are respectively fixedly connected to the bending plate, the connecting plate and the cylindrical plate.

[0035] In a further technical solution, the battery control assembly includes a control box and a battery box, and the control box is installed on the top of the battery box;

[0036] The hydraulic oil pump assembly includes a high-pressure pump station oil tank, an electromagnetic reversing valve and an oil pump motor. The body of the oil pump motor is installed on the high-pressure pump station oil tank. The electromagnetic reversing valve is suitable for connecting a pipeline to control the direction of oil in the cylinder.

[0037] A method for using a step-by-step telescopic mechanical self-locking hydraulic integrated working box comprises the following steps:

[0038] Step 1, determine the model of the hydraulic integrated work box; determine the hydraulic oil pump assembly and battery control assembly on both sides;

[0039] Step 2, debugging, open the control box and the oil pump motor, the oil pump motor pumps the hydraulic oil in the oil tank of the high-pressure pump station into the hydraulic cylinder, enters through the oil inlet, and realizes reversal through the electromagnetic reversing valve;

[0040] Step 3, Action steps:

[0041] a. The piston rod advances a certain distance x, driving the large toothed disc meshing with the piston rod to advance synchronously. At this time, the large toothed disc and the piston rod are relatively stationary, and the tooth surfaces of the large toothed disc and the position gear slide relatively. Here, the large toothed disc advances with the piston rod, while the position gear is relatively different. The advancing distance is not greater than the tooth width of the position gear, that is, there is no disengagement between the large toothed disc and the position gear.

[0042] b. The driving motor drives the position gear to rotate, and the position gear drives the large gear plate to rotate, and the large gear plate moves backward along the piston rod a distance x;

[0043] c. Continue to perform steps 1 and 2 for n times until the expected feeding distance is reached;

[0044] Each time the large toothed disc returns to the position where it fits the gland, the action effect is completed, and each return can support the piston rod, achieving the locking effect of lifting or supporting the hydraulic cylinder;

[0045] Piston rod backward process:

[0046] d. The driving motor drives the position gear to rotate in the opposite direction, and the position gear drives the large gear plate to rotate in the opposite direction, and the large gear plate moves forward along the piston rod by a distance x;

[0047] e. The piston rod retreats a certain distance x, driving the large toothed disc meshing with the piston rod to retreat synchronously. At this time, the large toothed disc and the piston rod are relatively stationary, and the tooth surface of the large toothed disc and the position gear slides relatively;

[0048] f. Continue to execute steps 4 and 5 for n times until the expected retreat distance is reached and return to the initial state;

[0049] Step 4, in step 3, the detection part passes, a micro switch and a displacement sensor are installed on the side of the large toothed disc opposite to the guide sleeve, the body of the micro switch is installed with a fixing plate 1, and the fixing plate 1 is fixedly connected to the pressure cover; the output end of the micro switch is movably connected to the end face of the large toothed disc; the micro switch controls the direction of the oil circuit by contact breaking;

[0050] The body of the displacement sensor is equipped with a second fixing plate, which is detachably connected to the pressure cover; the output end of the displacement sensor abuts against the end surface of the large toothed disc; the output end of the displacement sensor abuts against the side of the large toothed disc to detect the stroke of the large toothed disc;

[0051] Step 5, in step 3, when the driving motor drives the position gear to rotate, for a properly installed universal disk, that is, when the universal disk and the piston rod are installed coaxially, the moving rod and the output shaft of the driving motor are connected by a coupling, and the transmission gear on the moving rod rotates together with the position gear; the rotating gear ring is driven to rotate synchronously, and the outer ring of the rotating gear ring rotates, driving the track plate to rotate, and the slide plate 2 on the track plate is pulled by the arc bar, so as to move forward synchronously, so that the abutment ball on the telescopic rod abuts in the limiting ring groove;

[0052] Step 6: Install the hydraulic integrated working box described in claim 9 on the corresponding load.

[0053] Beneficial Effects

[0054] The present invention adopts a partial external thread on the piston rod, and drives the large gear ring forward or backward through the piston rod. The displacement distance is controlled within the tooth width length of the small gear, achieving the effect of one-step displacement and one-step locking, and adopts the effect of step-by-step lifting or supporting. Different from ordinary jacks, it has a lower error rate, reduces the loss rate of supported workpieces, and reduces the occurrence of safety accidents. The structure adopted by the present invention realizes the reciprocating switching of hydraulic movement and servo motor movement, which can achieve longer-term support and forward movement. The integrated hydraulic pump station and battery control box can realize independent operation without external interference, which is conducive to stable support and protection.

[0055] The hydraulic integrated work box has a compact structure, and a universal disk and a connecting disk are installed at the end of the piston rod, which can achieve the support effect of most external workpieces. The displacement sensor, micro switch and pull rod displacement sensor installed on the surface of the hydraulic cylinder realize the detection action, which is conducive to the automatic control of the displacement of the piston rod in the hydraulic cylinder. The end of the universal disk in the present invention is a ball head shape, which can realize the angled installation of the connecting disk, which is conducive to the angle installation and support effect at complex positions.

[0056] The height of the ball in the position gear of the present invention should be consistent with the side tooth portion, so that when the large toothed disk moves, it will contact the ball, and the ball will move forward in contact with the surface of the toothed portion. The lubricant is immersed in the cotton felt so that the lubricant will not spray out quickly, but will be continuously rolled out by the ball, thereby changing the sliding friction into local rolling friction and being able to lubricate the contact surface.

[0057] The present invention connects the moving rod and the output shaft of the driving motor through a coupling, and the transmission gear on the moving rod rotates with the position gear; the rotating ring gear is synchronously driven to rotate, and the outer ring of the rotating ring gear rotates, driving the track plate to rotate, and the slide plate 2 on the track plate is pulled by the arc bar, thereby moving forward synchronously, so that the abutment ball on the telescopic rod abuts in the limiting ring groove, and is locked in the limiting ring groove at a determined position, thereby ensuring the actual coaxial use of the universal disk and the piston rod, and ensuring the determination of the jacking direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0059] Figure 1 The structure of the hydraulic integrated working box of the present invention is Figure 1 ;

[0060] Figure 2 for Figure 1 A magnified view of part A;

[0061] Figure 3 The structure of the hydraulic integrated working box of the present invention is Figure 2 ;

[0062] Figure 4 It is a front end schematic diagram of the hydraulic integrated working box of the present invention;

[0063] Figure 5 for Figure 4 A cross-sectional view of BB;

[0064] Figure 6 The figure is a schematic diagram of the chassis structure of the present invention (the left cover plate and the right cover plate are not shown);

[0065] Figure 7 It is a schematic diagram of the structure of the driving motor, micro switch, displacement sensor and universal plate on the hydraulic cylinder of the present invention;

[0066] Figure 8 A schematic diagram of the hydraulic integrated working box of the present invention is shown in perspective 1;

[0067] Fig. 9 The second perspective view of the schematic diagram of the hydraulic integrated working box of the present invention (left cover plate removed);

[0068] Fig.10 The third perspective view of the schematic diagram of the hydraulic integrated working box of the present invention (with the right cover removed);

[0069] Fig.11 It is a structural diagram of the large toothed disc of the present invention;

[0070] Fig.12 It is a structural diagram of the gland of the present invention;

[0071] Fig.13 It is a structural diagram of the universal disk of the present invention;

[0072] Fig.14 Another position gear structure diagram of the present invention;

[0073] Fig.15 is a cross-sectional view of the middle portion of the position gear of the present invention;

[0074] Fig.16 for Fig.15 Enlarged view of part C;

[0075] Fig.17 It is a schematic diagram of another hydraulic integrated working box of the present invention;

[0076] Fig.18 for Fig.17 The enlarged view of point D;

[0077] Fig.19A schematic diagram of another universal disk of the present invention;

[0078] Fig. 20 It is a schematic diagram of the structure of the position frame and the moving rod of the present invention;

[0079] Fig.21 It is a front view of the rotary gear ring connected to the fixed cover of the present invention;

[0080] Fig. 22 for Fig.21 A magnified view of part E;

[0081] Fig.23 It is a schematic diagram of the structure of the fixed cover and the annular part of the present invention.

[0082] In the figure:

[0083] 1. Chassis; 2. Hydraulic oil pump assembly; 3. Battery control assembly; 4. Support seat; 5. Hydraulic cylinder; 6. Drive motor; 7. Large gear plate; 8. Position gear; 9. Universal plate;

[0084] 11. Frame; 12. Partition box; 13. Bending plate; 14. Lifting ear; 15. Left cover plate; 16. Right cover plate; 17. Door plate; 18. Front closing plate; 19. Center hole;

[0085] 21. Oil tank of high-pressure pump station; 22. Solenoid reversing valve; 23. Oil pump motor;

[0086] 31. Control box; 32. Battery box; 33. Hoop plate; 34. Positioning bolt;

[0087] 41. connecting plate; 42. cylindrical plate; 43. supporting rib plate; 44. connecting hole;

[0088] 51. Piston rod; 52. Gland; 53. Cylinder body; 531. Oil inlet; 532. Oil outlet; 54. Guide sleeve;

[0089] 61. Motor bracket;

[0090] 71. toothed portion; 72. fixing ring;

[0091] 81, side tooth portion; 82, middle portion; 83, lubrication chamber; 84, position chamber; 85, ball bearing; 86, position ring; 87, cotton felt;

[0092] 91. Locking plate; 92. Connecting plate; 93. Limiting ring groove;

[0093] 101, micro switch; 102, displacement sensor; 103, fixing plate 1; 104, fixing plate 2; 121, threaded hole;

[0094] 201, coupling; 202, moving rod; 203, transmission gear; 204, rotating gear ring; 205, track plate; 206, position frame; 207, square hole; 208, slide plate 1; 209, connecting bearing; 2041, inner ring; 2042, outer ring;

[0095] 301, fixed cover; 302, annular portion; 303, slide plate 2; 304, inner straight cylinder; 305, outer screw; 306, abutment ball; 307, arc strip. DETAILED DESCRIPTION

[0096] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0097] The application principle of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0098] Example 1

[0099] like Figure 1-7 As shown in FIG. 1 , an embodiment of the present invention is a step-by-step telescopic mechanical self-locking hydraulic integrated working box, comprising a base frame 1, a mounting cavity is provided in the base frame 1, a hydraulic oil pump assembly 2 is installed on one side of the mounting cavity, and a battery control assembly 3 is installed on the other side; a support seat 4 is installed at the end of the base frame 1; Figure 6 As shown, the chassis 1 includes a frame portion 11, a compartment box 12 and a bent plate 13. The compartment box 12 is installed in the bent plate 13. The compartment box 12 is provided with an opening and is arranged on the side facing away from the cylinder body 53. The frame portion 11 is fixedly connected to the bent plate 13, and a lifting lug 14 is provided on the surface. The battery control assembly 3 is detachably installed in the compartment box 12. The end of the frame portion 11 is detachably provided with a front closing plate 18, and a center hole 19 is provided on the front closing plate 18, and is suitable for the universal disk 9 to pass through. The diameter of the center hole 19 is smaller than the diameter of the connecting disk 92. Further, in Figure 6 The top end of the support base includes a support base structure; the support base 4 includes a connecting plate 41, a cylindrical plate 42 and a supporting rib plate 43, the connecting plate 41 is provided with a connecting hole 44, and the connecting plate 41 is fixedly connected to the cylindrical plate 42; there are multiple groups of supporting rib plates 43, and they are circumferentially fixedly connected to the outside of the cylindrical plate 42, and the supporting rib plates 43 are respectively fixedly connected to the bending plate 13, the connecting plate 41 and the cylindrical plate 42. When in use, the base frame can be placed vertically or horizontally, and can be fastened by installing positioning bolts or embedded bolts in the connecting holes 44.

[0100] A hydraulic cylinder 5, the cylinder body of which is installed in the installation cavity; a piston rod 51 is installed in the hydraulic cylinder 5, and the output direction of the piston rod 51 is arranged away from the support seat 4; the hydraulic cylinder 5 includes a gland 52, which is in the shape of a sleeve;

[0101] A driving motor 6 and a motor bracket 61, wherein the motor bracket 61 is mounted outside the gland 52, and the driving motor 6 is mounted on the motor bracket 61;

[0102] like Figure 7 As shown, it includes a large toothed disc 7, the outside of which is provided with an external tooth shape, and the inside of which is provided with an internal thread; an external thread is provided on the piston rod 51, and the large toothed disc 7 is threadedly connected to the piston rod 51; a micro switch 101 and a displacement sensor 102 are installed on the side of the large toothed disc 7 opposite to the guide sleeve 54, and the body of the micro switch 101 is installed with a fixing plate 103, and the fixing plate 103 is fixedly connected to the pressure cover 52; the output end of the micro switch 101 is movably connected to the end face of the large toothed disc 7; the body of the displacement sensor 102 is installed with a fixing plate 2 104, and the fixing plate 2 104 is detachably connected to the pressure cover 52; the output end of the displacement sensor 102 abuts against the end face of the large toothed disc 7.

[0103] A pinion 8 is fixedly mounted on the output end of the driving motor 6, and the pinion 8 is meshed with the large toothed disc 7; the tooth width of the pinion 8 is greater than the tooth width of the external tooth shape;

[0104] The end of the universal disk 9 is in a ball head shape and is detachably connected to the end of the piston rod 51 by installing a locking disk 91. The universal disk 9 extends to the outside of the chassis 1 and is installed with a connecting disk 92.

[0105] The hydraulic cylinder 5 also includes a cylinder body 53, which is provided with an oil inlet 531 and an oil outlet 532; one end of the cylinder body 53 is fixedly connected to the base frame 1, and a volume chamber is provided in the cylinder body 53, and the end of the piston rod 51 away from the universal plate 9 is installed in the volume chamber; a guide sleeve 54 is installed at the end of the cylinder body 53, and the guide sleeve 54 is detachably connected to the cylinder body 53; the rod body of the piston rod 51 is connected to the cylinder body 53, the guide sleeve 54, the pressure cover 52 and the large gear plate 7.

[0106] like Figure 1 and Figure 3 A left cover plate 15 and a right cover plate 16 are detachably mounted on both sides of the base frame 1 . A door plate 17 is provided on the left cover plate 15 , and the door plate 17 is hinged to the left cover plate 15 . Figure 3 This is the usage status of the hydraulic integrated working box. When in use, you only need to check and adjust the hydraulic oil pump assembly. The battery control assembly is installed on the other side.

[0107] Working method:

[0108] 1) The piston rod advances a certain distance x, driving the large gear ring meshing with the piston rod to advance synchronously. At this time, the large gear ring and the piston rod are relatively stationary, and the tooth surfaces of the large gear ring and the pinion gear slide relatively. Here, the large gear ring advances with the piston rod, while the pinion gear is relatively different. The advancing distance is not greater than the tooth width of the pinion gear, that is, there is no separation between the large gear ring and the pinion gear.

[0109] 2) The driving motor drives the small gear to rotate, and the small gear drives the large ring gear to rotate, and the large ring gear moves backward along the piston rod a distance x;

[0110] 3) Continue to execute steps 1 and 2 for n times until the expected feeding distance is reached.

[0111] Each time the large gear ring returns to the position where the gland is fitted, the action effect is completed, and each return can support the piston rod to achieve the locking effect of lifting or supporting the hydraulic cylinder.

[0112] Piston rod backward process:

[0113] 4) The driving motor drives the small gear to rotate in the opposite direction, and the small gear drives the large gear ring to rotate in the opposite direction, and the large gear ring moves forward along the piston rod by a distance x;

[0114] 5) The piston rod retreats a certain distance x, driving the large gear ring meshing with the piston rod to retreat synchronously. At this time, the large gear ring and the piston rod are relatively stationary, and the tooth surfaces of the large gear ring and the pinion gear slide relatively;

[0115] 6) Continue to execute steps 4 and 5 for n times until the expected retreat distance is reached and return to the initial state.

[0116] During the retreat process, since the piston rod drives the large gear ring to retreat a certain distance and returns to the position where the pressure cover is fitted, the piston rod can be supported each time it returns to the position, thereby achieving the locking effect of the hydraulic cylinder descending or retracting. The single lifting distance can be 0-180mm, and step-by-step lifting and locking can be achieved to maintain the overall action effect and locking effect, which is convenient for stability in actual lifting or support and will not cause sudden retraction problems. Since the present embodiment adopts the effect of step-by-step lifting or support, it is different from ordinary jacks and has a lower error rate, which reduces the loss rate of supported workpieces and reduces the occurrence of safety accidents. The structure adopted by the present invention realizes the reciprocating switching of hydraulic movement and servo motor movement, which can achieve longer-term support and forward movement. The integrated hydraulic pump station and battery control box can realize independent operation without external interference, which is conducive to stable support and protection.

[0117] Example 2

[0118] like Figure 8-13 As shown, another embodiment of the present invention is based on Example 1. Fig.11As shown, the large toothed disc 7 includes a toothed portion 71 and a fixing ring 72 , the fixing ring 72 is integrally connected to the toothed portion 71 , and an external tooth is provided outside the toothed portion 71 , an internal thread is provided inside the fixing ring 72 , and the fixing ring 72 is provided on the side of the external tooth opposite to the universal disc 9 .

[0119] like Figure 8 As shown, the battery control assembly 3 includes a control box 31 and a battery box 32, and the control box 31 is installed on the top of the battery box 32 and fixedly installed in the compartment box;

[0120] like Fig. 9 As shown, the hydraulic oil pump assembly 2 includes a high-pressure pump station oil tank 21, an electromagnetic reversing valve 22 and an oil pump motor 23. The body of the oil pump motor 23 is installed on the high-pressure pump station oil tank 21. The electromagnetic reversing valve 22 is suitable for connecting a pipeline to control the direction of the oil in the cylinder 53. The hydraulic oil pump assembly can also be equipped with HYDAC-HDA pressure sensor, QUQ1-10X0.25 air filter, CBBALHN balance valve and other regulating and control components to achieve the pumping of hydraulic oil and the balanced use of the oil tank.

[0121] A pull rod displacement sensor is also installed on the cylinder body, and the output end abuts against the external thread of the piston rod, which is suitable for detecting the displacement distance of the piston rod.

[0122] At the connection point where the connecting plate passes through the chassis, a protective cover can be installed to ensure that external dust or debris will not enter the hydraulic integrated working box. Fig.13 The ball end of the universal disc is shown and is secured to the end of the piston rod by a locking disc; Fig.12 The middle pressure cover shows that its upper part is provided with a variety of mounting slots and fixing plates, which are used to connect with micro switches, displacement sensors and pull rod displacement sensors.

[0123] Example 3

[0124] like Figure 14-16 As shown, another implementation scheme of the present invention is based on Example 2. Since the driving gear and the locking nut in the prior art are driven by the piston to move linearly when they are in action, there will be frequent friction between the two sets of tooth surfaces, which will cause the driving gear and the locking nut to be quickly scrapped.

[0125] Set as Fig.14 The new position gear 8 includes side tooth portions 81 and a middle portion 82 located on both sides, and the width of the middle portion 82 is smaller than the width of the tooth-shaped portion 71;

[0126] The side tooth portion 81 is fixedly connected to the middle portion 82, and a lubrication cavity 83 and a position cavity 84 are provided in the middle portion 82, the lubrication cavity 83 is communicated with the position cavity 84, a ball 85 is installed in the position cavity 84, and a position ring 86 is installed outside the ball 85, the position ring 86 is connected to the outside of the position cavity 84, and is suitable for limiting the ball 85 from leaving the position cavity 84;

[0127] The lubricating cavity 83 is filled with lubricant, and a cotton felt 87 is installed in the position cavity 84. The height of the ball 85 in the position gear should be consistent with the side tooth portion 81, so that when the large toothed disc 7 moves, it will contact the ball 85, and the ball 85 will move forward along the surface of the toothed portion 71. The lubricant is immersed in the cotton felt 87 so that the lubricant will not be sprayed out quickly, and it will be continuously rolled out by the ball, so that the sliding friction is changed to local rolling friction, and the contact surface can be lubricated.

[0128] Example 4

[0129] like Figure 17-23 As shown, another implementation scheme of the present invention is based on Example 3. Because the end of the aforementioned universal disk is spherical, this also leads to the problem of angle deviation in actual use. In most actual uses, the piston rod and the universal disk need to be installed on the same axis. Therefore, it is arranged that the universal disk is fixed by a locking plate after the angle is adjusted, and the moving part and the fixed part are installed to achieve the effect of multi-angle abutment to maintain the angle of the universal disk.

[0130] like Fig.17 As shown, the position gear 8 is installed at the output end of the driving motor 6, and the output end of the driving motor 6 is coaxially installed with a moving rod 202 through a coupling 201;

[0131] A moving part and a fixed part are respectively installed on one side of the front closing plate 18 opposite to the hydraulic cylinder 5, the moving rod 202 is installed on the moving part, a transmission gear 203 is installed on the moving rod 202, and the transmission gear 203 is fixedly connected to the moving rod 202;

[0132] The fixing part includes a rotating ring gear 204 and a track plate 205, and the transmission gear 203 is movably connected to the rotating ring gear 204; the track plate 205 is installed on the rotating ring gear 204, and a limiting member is installed in the track plate 205; a limiting ring groove 93 is provided on the universal disk 9, and the end of the limiting member is suitable for movably abutting in the limiting ring groove 93.

[0133] Combination Fig.18 and Fig. 20As shown, the moving member includes a position frame 206, the position frame 206 is detachably connected to the front closing plate 18, and a square hole 207 is opened on the position frame 206, and a slide plate 208 is installed in the square hole 207 located on one side of the front closing plate 18, and a connecting bearing 209 is installed in the slide plate 208, the inner ring of the connecting bearing 209 is fixedly connected to one end of the moving rod 202, and the outer ring of the connecting bearing 209 is connected to the sliding plate;

[0134] The fixing member also includes a fixing cover 301. The fixing cover 301 is as shown in FIG. Fig.23 As shown, the annular plate and the vertical pole are fixed, and the opening on the annular plate is fixed to the front closing plate by mounting bolts. The fixed cover 301 is sleeved on the universal disk 9, and one end is detachably connected to the front closing plate 18, so an annular portion 302 is fixedly installed on the fixed cover 301. The slewing gear ring 204 includes an inner ring 2041, an outer ring 2042 and a rolling body; the rolling body is not drawn in the figure, and the existing slewing support structure can be referred to. The annular portion 302 is fixedly connected to the inner ring 2041, and the inner ring 2041 and the outer ring 2042 rotate relative to each other through the rolling body;

[0135] The outer ring 2042 is provided with a connecting column on the outside and is fixedly connected to the track plate 205. The outer ring 2042 is provided with a tooth shape on the outside and meshes with the transmission gear 203. The track plate 205 is provided with a track groove. The limiting member includes a second slide plate 303, which is installed in the track groove. A telescopic rod is installed on the second slide plate 303. The telescopic rod includes an inner straight tube 304 and an outer screw 305. The inner straight tube 304 is threadedly connected to the outer screw 305, and an abutment ball 306 is installed at the end of the outer screw 305. The track plate 205 is provided with at least four groups, Fig.21 There are 6 groups shown in the figure, and they are circumferentially distributed on the outer ring 2042; the ends of the slide plate 2 303 and the fixed cover 301 are equipped with arc strips 307;

[0136] The outer ring 2042 is suitable for driving the second slide plate 303 on the track plate 205 to move forward or backward during rotation, and the outer ring 2042 rotates relative to the inner ring 2041, driving and pulling the second slide plate 303 through the arc strip 307, so that the second slide plate 303 slides in the track groove, and the abutment ball 306 is movably abutted in the limiting ring groove 93. Fig.21 From the perspective of the embodiment, the arc strip 307 is connected to the back side of the slide plate 2. When the piston rod and the universal disk need to be installed on the same axis, the position can be determined by moving the moving rod, and then connected to the output end of the drive motor 6 through a coupling. The position of the slide plate 1 208 can be fixed to the front closing plate or the position frame by bolts. The fixing method is not shown in the figure, and the existing fixing method can be referred to.

[0137] A method for using a step-by-step telescopic mechanical self-locking hydraulic integrated working box comprises the following steps:

[0138] Step 1, determine the model of the hydraulic integrated working box; determine the hydraulic oil pump assembly 2 and the battery control assembly 3 on both sides;

[0139] Step 2, debugging, open the control box 31 and the oil pump motor 23, the oil pump motor 23 pumps the hydraulic oil in the high-pressure pump station tank 21 into the hydraulic cylinder 5, enters through the oil inlet 531, and realizes reversal through the electromagnetic reversing valve 22;

[0140] Step 3, Action steps:

[0141] a. The piston rod 51 advances a certain distance x, driving the large toothed disc 7 meshing with the piston rod 51 to advance synchronously. At this time, the large toothed disc 7 and the piston rod 51 are relatively stationary, and the tooth surfaces of the large toothed disc 7 and the position gear 8 slide relatively. Here, the large toothed disc 7 advances with the piston rod 51, while the position gear 8 is relatively different. The advancing distance is not greater than the tooth width of the position gear 8, that is, the large toothed disc 7 and the position gear 8 are not disengaged.

[0142] b. The driving motor 6 drives the position gear 8 to rotate, and the position gear 8 drives the large toothed disc 7 to rotate, and the large toothed disc 7 moves backward along the piston rod 51 by a distance x;

[0143] c. Continue to perform steps 1 and 2 for n times until the expected feeding distance is reached;

[0144] Each time the large toothed disc 7 returns to the position where the gland is fitted, the action effect is completed, and each return can support the piston rod 51, achieving the locking effect of lifting or supporting the hydraulic cylinder 5;

[0145] The backward process of piston rod 51:

[0146] d. The driving motor 6 drives the position gear 8 to rotate in the opposite direction, and the position gear 8 drives the large toothed disc 7 to rotate in the opposite direction, and the large toothed disc 7 moves forward along the piston rod 51 by a distance x;

[0147] e. The piston rod 51 retreats a certain distance x, driving the large toothed disc 7 meshing with the piston rod 51 to retreat synchronously. At this time, the large toothed disc 7 and the piston rod 51 are relatively stationary, and the tooth surfaces of the large toothed disc 7 and the position gear 8 slide relative to each other;

[0148] f. Continue to execute steps 4 and 5 for n times until the expected retreat distance is reached and return to the initial state;

[0149] Step 4, in step 3, the detection part passes, a micro switch 101 and a displacement sensor 102 are installed on the side of the large toothed disc 7 relative to the guide sleeve 54, the body of the micro switch 101 is installed with a fixing plate 103, and the fixing plate 103 is fixedly connected to the pressure cover 52; the output end of the micro switch 101 is movably connected to the end surface of the large toothed disc 7; the micro switch 101 controls the direction of the oil path by contact breaking;

[0150] The body of the displacement sensor 102 is installed with a second fixing plate 104, which is detachably connected to the pressure cover 52; the output end of the displacement sensor 102 abuts against the end surface of the large toothed disc 7; the output end of the displacement sensor 102 abuts against the side of the large toothed disc 7 to detect the stroke of the large toothed disc 7;

[0151] Step 5, in step 3, when the driving motor 6 drives the position gear 8 to rotate, for the properly installed universal disk 9, that is, when the universal disk 9 and the piston rod 51 are installed and used coaxially, the moving rod 202 and the output shaft of the driving motor 6 are connected through the coupling 201, and the transmission gear 203 on the moving rod 202 rotates together with the position gear 8; the rotating ring gear 204 is synchronously driven to rotate, and the outer ring 2042 of the rotating ring gear 204 rotates, driving the track plate 205 to rotate, and the slide plate 2 303 on the track plate 205 is pulled by the arc strip 307, so as to move forward synchronously, so that the abutment ball 306 on the telescopic rod abuts in the limiting ring groove 93;

[0152] Step 6: Install the hydraulic integrated working box described in claim 9 on the corresponding load.

[0153] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0154] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Step-by-step telescopic mechanical self-locking hydraulic integrated working box, characterized in that: include: A base frame (1), wherein a mounting cavity is provided in the base frame (1), a hydraulic oil pump assembly (2) is installed on one side of the mounting cavity, and a battery control assembly (3) is installed on the other side; a support seat (4) is installed at the end of the base frame (1); A hydraulic cylinder (5), wherein the cylinder body of the hydraulic cylinder (5) is installed in the installation cavity; a piston rod (51) is installed in the hydraulic cylinder (5), and the output direction of the piston rod (51) is arranged away from the support seat (4); the hydraulic cylinder (5) includes a gland (52), and the gland (52) is in the shape of a sleeve; A driving motor (6) and a motor bracket (61), wherein the motor bracket (61) is mounted outside the gland (52), and the driving motor (6) is mounted on the motor bracket (61); A large toothed disc (7), wherein the large toothed disc (7) is provided with external teeth on the outside and internal threads on the inside; the piston rod (51) is provided with external threads, and the large toothed disc (7) is threadedly connected to the piston rod (51); A position gear (8), wherein the output end of the driving motor (6) is fixedly mounted with the position gear (8), and the position gear (8) is meshed with the large toothed disc (7); the tooth width of the position gear (8) is greater than the tooth width of the external tooth shape; A universal disk (9) has a ball-shaped end and is detachably connected to the end of a piston rod (51) by installing a locking disk (91). The universal disk (9) extends outside the chassis (1) and is installed with a connecting disk (92).

2. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 1 is characterized in that: The hydraulic cylinder (5) further comprises a cylinder body (53), and the cylinder body (53) is provided with an oil inlet (531) and an oil outlet (532); one end of the cylinder body (53) is fixedly connected to the base frame (1), and a volume chamber is provided in the cylinder body (53), and the end of the piston rod (51) away from the universal disk (9) is installed in the volume chamber; a guide sleeve (54) is installed at the end of the cylinder body (53), and the guide sleeve (54) is detachably connected to the cylinder body (53); the rod body of the piston rod (51) is connected to the cylinder body (53), the guide sleeve (54), the pressure cover (52) and the large gear disk (7).

3. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 2 is characterized in that: The large toothed disc (7) comprises a toothed portion (71) and a fixing ring (72), wherein the fixing ring (72) is integrally connected to the toothed portion (71), and an external toothed portion (71) is provided outside the toothed portion, an internal thread is provided inside the fixing ring (72), and the fixing ring (72) is provided on the side of the external toothed portion opposite to the universal disc (9).

4. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 3 is characterized in that: The base frame (1) comprises a frame portion (11), a compartment box (12) and a bent plate (13); the compartment box (12) is installed in the bent plate (13); the compartment box (12) is provided with an opening and is arranged on a side facing away from the cylinder body (53); The frame part (11) is fixedly connected to the bent plate (13), and a lifting lug (14) is arranged on the surface; The battery control assembly (3) is detachably mounted in the compartment box (12); A front closing plate (18) is detachably mounted on the end of the frame portion (11), and a center hole (19) is provided on the front closing plate (18) and is suitable for the universal disk (9) to pass through; the diameter of the center hole (19) is smaller than the diameter of the connecting disk (92); A left cover plate (15) and a right cover plate (16) are detachably mounted on both sides of the base frame (1), and a door plate (17) is provided on the left cover plate (15), and the door plate (17) is hinged to the left cover plate (15).

5. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 4 is characterized in that: The position gear (8) comprises side tooth portions (81) and a middle portion (82) located on both sides, and the width of the middle portion (82) is smaller than the width of the toothed portion (71); The side tooth portion (81) is fixedly connected to the middle portion (82), and a lubrication cavity (83) and a position cavity (84) are provided in the middle portion (82), the lubrication cavity (83) is communicated with the position cavity (84), a ball (85) is installed in the position cavity (84), and a position ring (86) is installed outside the ball (85), the position ring (86) is connected to the outside of the position cavity (84), and is suitable for limiting the ball (85) from leaving the position cavity (84); The lubricating cavity (83) is filled with lubricant, and a cotton felt (87) is also installed in the positioning cavity (84).

6. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 5 is characterized in that: The position gear (8) is installed at the output end of the driving motor (6), and the output end of the driving motor (6) is coaxially installed with a moving rod (202) via a coupling (201); A moving part and a fixed part are respectively installed on one side of the front closing plate (18) opposite to the hydraulic cylinder (5), the moving rod (202) is installed on the moving part, a transmission gear (203) is installed on the moving rod (202), and the transmission gear (203) is fixedly connected to the moving rod (202); The fixing member comprises a rotating gear ring (204) and a track plate (205); the transmission gear (203) is movably connected to the rotating gear ring (204); a track plate (205) is mounted on the rotating gear ring (204); a limiting member is mounted in the track plate (205); a limiting ring groove (93) is provided on the universal disk (9), and an end of the limiting member is adapted to movably abut against the limiting ring groove (93).

7. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 6 is characterized in that: The movable member comprises a position frame (206), the position frame (206) is detachably connected to the front closing plate (18), a square hole (207) is provided on the position frame (206), a slide plate (208) is installed in the square hole (207) located on one side of the front closing plate (18), a connecting bearing (209) is installed in the slide plate (208), the inner ring of the connecting bearing (209) is fixedly connected to one end of the moving rod (202), and the outer ring of the connecting bearing (209) is connected to the sliding plate; The fixing member further comprises a fixing cover (301), the fixing cover (301) is sleeved on the universal disk (9), and one end of the fixing cover (301) is detachably connected to the front closing plate (18), so that an annular portion (302) is fixedly mounted on the fixing cover (301), and the rotating gear ring (204) comprises an inner ring (2041), an outer ring (2042) and a rolling body; the annular portion (302) is fixedly connected to the inner ring (2041), and the inner ring (2041) and the outer ring (2042) rotate relative to each other via the rolling body; The outer ring (2042) is provided with a connecting column outside and is fixedly connected to the track plate (205); the outer ring (2042) is provided with a tooth shape outside and is meshed with the transmission gear (203); A track groove is arranged in the track plate (205), the limiting member comprises a second slide plate (303), the second slide plate (303) is installed in the track groove, a telescopic rod is installed on the second slide plate (303), the telescopic rod comprises an inner straight tube (304) and an outer screw rod (305), the inner straight tube (304) is threadedly connected to the outer screw rod (305), and an abutment ball (306) is installed at the end of the outer screw rod (305); The track plates (205) are provided in at least four groups and are circumferentially distributed on the outer ring (2042); arc strips (307) are installed at the ends of the second slide plate (303) and the fixed cover (301); The outer ring (2042) is suitable for driving the second slide plate (303) on the track plate (205) to move forward or backward during rotation, driving the abutment ball (306) to moveably abut in the limiting ring groove (93).

8. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 7 is characterized in that: The support seat (4) comprises a connecting plate (41), a cylindrical plate (42) and a supporting rib plate (43); a connecting hole (44) is provided on the connecting plate (41); the connecting plate (41) is fixedly connected to the cylindrical plate (42); a plurality of supporting rib plates (43) are provided and are circumferentially fixedly connected to the outside of the cylindrical plate (42); the supporting rib plates (43) are respectively fixedly connected to the bending plate (13), the connecting plate (41) and the cylindrical plate (42).

9. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 8 is characterized in that: The battery control assembly (3) comprises a control box (31) and a battery box (32), wherein the control box (31) is installed on top of the battery box (32); The hydraulic oil pump assembly (2) comprises a high-pressure pump station oil tank (21), an electromagnetic reversing valve (22) and an oil pump motor (23); the body of the oil pump motor (23) is mounted on the high-pressure pump station oil tank (21); and the electromagnetic reversing valve (22) is suitable for connecting a pipeline to control the direction of oil in the cylinder body (53).

10. A method for using a step-by-step telescopic mechanical self-locking hydraulic integrated working box, characterized in that: The following steps are involved: Step 1, determine the model of the hydraulic integrated working box; determine the hydraulic oil pump assembly (2) and the battery control assembly (3) on both sides; Step 2, debugging, open the control box (31) and the oil pump motor (23), the oil pump motor (23) pumps the hydraulic oil in the high-pressure pump station tank (21) into the hydraulic cylinder (5), enters through the oil inlet (531), and realizes reversal through the electromagnetic reversing valve (22); Step 3, Action steps: a. The piston rod (51) advances a certain distance x, driving the large toothed disc (7) meshing with the piston rod (51) to advance synchronously. At this time, the large toothed disc (7) and the piston rod (51) are relatively stationary, and the tooth surfaces of the large toothed disc (7) and the position gear (8) slide relatively. Here, the large toothed disc (7) advances with the piston rod (51), while the position gear (8) is relatively different. The advancing distance is not greater than the tooth width of the position gear (8), that is, the large toothed disc (7) and the position gear (8) do not disengage. b. The drive motor (6) drives the position gear (8) to rotate, and the position gear (8) drives the large toothed disc (7) to rotate, and the large toothed disc (7) moves backward along the piston rod (51) a distance x; c. Continue to perform steps 1 and 2 for n times until the expected feeding distance is reached; Each time the large toothed disc (7) returns to the position where it fits the gland, the action effect is completed, and each time it returns, the piston rod (51) can be supported, thereby achieving the locking effect of lifting or supporting the hydraulic cylinder (5); Piston rod (51) backward process: d. The drive motor (6) drives the position gear (8) to rotate in the opposite direction, the position gear (8) drives the large toothed disc (7) to rotate in the opposite direction, and the large toothed disc (7) moves forward along the piston rod (51) by a distance x; e. The piston rod (51) retreats a certain distance x, driving the large toothed disc (7) meshing with the piston rod (51) to retreat synchronously. At this time, the large toothed disc (7) and the piston rod (51) are relatively stationary, and the tooth surfaces of the large toothed disc (7) and the position gear (8) slide relative to each other; f. Continue to execute steps 4 and 5 for n times until the expected retreat distance is reached and return to the initial state; Step 4, in step 3, the detection part is passed, a micro switch (101) and a displacement sensor (102) are installed on the side of the large toothed disc (7) opposite to the guide sleeve (54), the body of the micro switch (101) is installed with a fixing plate 1 (103), and the fixing plate 1 (103) is fixedly connected to the pressure cover (52); the output end of the micro switch (101) is movably connected to the end surface of the large toothed disc (7); the micro switch (101) controls the direction of the oil path by contact opening and closing; The body of the displacement sensor (102) is provided with a second fixing plate (104), which is detachably connected to the pressure cover (52); the output end of the displacement sensor (102) abuts against the end surface of the large toothed disc (7); the output end of the displacement sensor (102) abuts against the side surface of the large toothed disc (7) to detect the stroke of the large toothed disc (7); Step 5, in step 3, when the driving motor (6) drives the position gear (8) to rotate, for the properly installed universal disk (9), that is, when the universal disk (9) and the piston rod (51) are installed and used coaxially, the movable rod (202) and the output shaft of the driving motor (6) are connected through the coupling (201), and the transmission gear (203) on the movable rod (202) and the position gear (8) rotate together; synchronously driving the rotating ring gear (204) to rotate, the outer ring (2042) of the rotating ring gear (204) rotates, driving the track plate (205) to rotate, and the slide plate 2 (303) on the track plate (205) is pulled by the arc strip (307), so as to move forward synchronously, so that the abutment ball (306) on the telescopic rod abuts in the limiting ring groove (93); Step 6: Install the hydraulic integrated working box described in claim 9 on the corresponding load.

Images