Stepping telescopic mechanical self-locking hydraulic integrated work box

Abstract

The utility model discloses a stepping telescopic mechanical self-locking type hydraulic integrated work box, and belongs to the technical field of hydraulic cylinders. Comprising a working frame, a mounting cavity is formed in the working 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 working frame; a cylinder body of the hydraulic cylinder is mounted in the mounting cavity; a piston rod is mounted in the hydraulic cylinder; a working motor is mounted on the hydraulic cylinder; the working fluted disc is in threaded connection with the piston rod, and the outside of the working fluted disc is meshed with the pinion; the end of the position connecting piece is in a ball head shape, the position connecting piece is detachably connected to the end of the piston rod through an installation locking disc, and the position connecting piece extends out of the working frame and is provided with a connecting disc. The technical problems that an existing hydraulic component and an existing servo component are separated from the hydraulic cylinder, the connecting angle is relatively fixed, and installation at other angles is lacked are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders and relates to a step-by-step telescopic mechanical self-locking hydraulic integrated working box. Background Art

[0002] Hydraulic jacks are widely used for lifting and supporting large equipment and are crucial for ensuring the safety of large equipment lifting operations. Traditional hydraulic jacks rely on oil pressure to support heavy objects for extended periods during lifting operations, posing a safety risk of sudden jack failure and load instability. Furthermore, mechanical screw jacks are often used to maintain the load during the lifting process, consuming significant 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 shell, the rotating motor is started, so that the rotating motor drives 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 shell, the piston is locked, 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 means that external inspection and debugging are required for installation and debugging, and large hydraulic oil stations are needed 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 directions such as diagonal bracing.

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

[0006] In order to solve the above technical problems, the inventors have come up with the technical solution of the present utility model through practice and summary. The present utility model discloses that the basic concept of the technical solution adopted by the present utility model to solve the above technical problems is:

[0007] Step-by-step telescopic mechanical self-locking hydraulic integrated work box, including:

[0008] A work frame, wherein a mounting cavity is provided in the work frame, 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 work frame;

[0009] 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;

[0010] A working motor and a motor bracket, wherein the motor bracket is installed outside the gland, and the working motor is installed on the motor bracket;

[0011] A working toothed disc, wherein the outer surface of the working toothed disc is provided with an external tooth shape and the inner surface is provided with an internal thread; the piston rod is provided with an external thread, and the working toothed disc is threadedly connected to the piston rod;

[0012] A pinion gear is fixedly mounted on the output end of the working motor, and the pinion gear is meshed with the working gear disc; the tooth width of the pinion gear is greater than the tooth width of the external tooth profile;

[0013] The position connector has a ball-shaped end and a stepped middle portion, and a mounting hole is provided at the end and can be detachably connected to the end of the piston rod by installing a locking disk. The position connector extends outside the work frame and is installed with a connecting disk.

[0014] In a further technical solution, the hydraulic cylinder also includes a cylinder shell, which is provided with an oil inlet and an oil outlet; one end of the cylinder shell is fixedly connected to the working frame, and a volume chamber is provided in the cylinder shell, and the end of the piston rod away from the position connection piece is installed in the volume chamber; a guide sleeve is installed at the end of the cylinder shell, and the guide sleeve is detachably connected to the cylinder shell; the rod body of the piston rod is connected to the cylinder shell, the guide sleeve, the pressure cover and the working gear disc.

[0015] In a further technical solution, the working toothed disc includes a toothed portion and a fixing ring, the fixing ring is integrally connected to the toothed portion, and an external tooth shape is provided outside the toothed portion, an internal thread is provided inside the fixing ring, and a fixing ring is provided on one side of the external tooth shape relative to the connecting piece.

[0016] In a further technical solution, the working frame includes a frame portion, a compartment box and a bent plate, wherein the compartment box is installed in the bent plate, and the compartment box is provided with an opening and is arranged toward a side facing away from the cylinder shell;

[0017] The frame portion is fixedly connected to the bent plate and has a lifting lug on its surface;

[0018] The battery control assembly is removably mounted within the compartment. A front closure plate is removably mounted on the end of the frame. This plate has a central hole for receiving a connector; the diameter of the central hole is smaller than the diameter of the connection plate. The work frame also includes an upper closure plate. The upper closure plate, front closure plate, left cover plate, right cover plate, and bent plate secure the six sides of the integrated work box, completing its outdoor installation.

[0019] In a further technical solution, the support seat includes a connecting plate, a cylindrical plate and a support rib plate, the connecting plate is provided with a connecting hole, and the connecting plate is fixedly connected to the cylindrical plate; multiple groups of support rib plates are provided, and are circumferentially fixedly connected to the outside of the cylindrical plate, and the support rib plates are respectively fixedly connected to the bending plate, the connecting plate and the cylindrical plate.

[0020] In a further technical solution, the battery control assembly includes a relay box, a battery box and a mounting member, wherein the relay box is mounted on the top of the battery box and is separately arranged;

[0021] The mounting member includes a hoop plate and positioning bolts. The hoop plate abuts the top of the battery box. Two sets of positioning bolts are installed at both ends of the hoop plate. A threaded hole is opened in the compartment box, and the positioning bolts are threadedly connected to the threaded hole.

[0022] In a further technical solution, a micro switch and a displacement sensor are installed on the side of the working toothed disc opposite to the guide sleeve, and a fixing plate 1 is installed on the body of the micro switch, 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 surface of the working toothed disc;

[0023] 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 working gear disc.

[0024] In a further technical solution, the hydraulic oil pump assembly includes a high-pressure pump station 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 tank, and the electromagnetic reversing valve is suitable for connecting a pipeline to control the direction of the oil in the cylinder shell.

[0025] In a further technical solution, the work frame is provided with a detachable left cover and a right cover on both sides, the left cover being provided with a door panel hingedly connected to the left cover. The gland is provided with a through slot and multiple sets of platform surfaces; the fixing plate is fixedly connected to the gland.

[0026] Beneficial effects

[0027] This utility model adopts a partial external thread on the piston rod, which 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. It 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 this utility model 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.

[0028] This hydraulic integrated work box has a compact structure, and the piston rod end is equipped with a position connector and a connecting plate, which can achieve the most external workpiece support effects. The displacement sensor, micro switch and pull rod displacement sensor installed on the surface of the hydraulic cylinder realize the detection of movement, which facilitates the automatic control of the displacement of the piston rod in the hydraulic cylinder.

[0029] The end of the position connector in the present invention is in the shape of a ball head, which can realize the installation of the connection plate at an angle, and is beneficial to the angle installation and support effect at complex positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 The structure of the hydraulic integrated working box of the utility model Figure 1 ;

[0032] Figure 2 for Figure 1 A magnified view of part A;

[0033] Figure 3 The structure of the hydraulic integrated working box of the utility model Figure 2 ;

[0034] Figure 4 This is a front end schematic diagram of the hydraulic integrated working box of the present utility model;

[0035] Figure 5 for Figure 4 Cross-sectional view of BB;

[0036] Figure 6 This is a schematic diagram of the working frame structure of the present invention (the left cover and the right cover are not shown);

[0037] Figure 7 This is a schematic diagram of the structure of the working motor, micro switch, displacement sensor and position connector on the hydraulic cylinder of the utility model;

[0038] Figure 8 This is a schematic diagram of the hydraulic integrated working box of the present invention from perspective 1;

[0039] Figure 9 This is a schematic diagram of the hydraulic integrated working box of the present invention from perspective 2 (left cover removed);

[0040] Figure 10This is a schematic diagram of the hydraulic integrated working box of the present invention from perspective three (with the right cover removed);

[0041] Figure 11 This is a structural diagram of the working toothed disc of the utility model;

[0042] Figure 12 This is a structural diagram of the gland of the present utility model;

[0043] Figure 13 This is a structural diagram of the position connector of the utility model.

[0044] In the figure: 1. Working frame; 2. Hydraulic oil pump assembly; 3. Battery control assembly; 4. Support base; 5. Hydraulic cylinder; 6. Working motor; 7. Working gear plate; 8. Pinion; 9. Position connector;

[0045] 11. Frame; 12. Partition box; 13. Bent plate; 14. Lifting lug; 15. Left cover; 16. Right cover; 17. Door panel; 18. Front closing plate; 19. Center hole;

[0046] 21. High-pressure pump station oil tank; 22. Solenoid reversing valve; 23. Oil pump motor;

[0047] 31. Relay box; 32. Battery box; 33. Hoop plate; 34. Positioning bolt;

[0048] 41. Connecting plate; 42. Cylindrical plate; 43. Support ribs; 44. Connecting hole;

[0049] 51. Piston rod; 52. Gland; 53. Cylinder housing; 531. Oil inlet; 532. Oil outlet; 54. Guide sleeve;

[0050] 61. Motor bracket;

[0051] 71. Toothed portion; 72. Fixed ring;

[0052] 91. Locking disc; 92. Connecting disc;

[0053] 101. Micro switch; 102. Displacement sensor; 103. Fixing plate 1; 104. Fixing plate 2; 121. Threaded hole. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions 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 intended to limit the present invention.

[0055] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0056] Example 1

[0057] like Figure 1-7 As shown in FIG. 1 , an embodiment of the present invention is provided, a step-by-step telescopic mechanical self-locking hydraulic integrated working box, comprising a working frame 1, a mounting cavity provided in the working frame 1, a hydraulic oil pump assembly 2 installed on one side of the mounting cavity, and a battery control assembly 3 installed on the other side; a support base 4 is installed at the end of the working frame 1; Figure 6 As shown, the work stand 1 includes a frame portion 11, a compartment 12 and a bent plate 13. The compartment 12 is installed in the bent plate 13. The compartment 12 is provided with an opening and is arranged on the side facing away from the cylinder shell 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 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, which is suitable for the position connector 9 to pass through. The diameter of the center hole 19 is smaller than the diameter of the connecting plate 92. Further, in Figure 6 The top end of the support frame includes a support base structure; the support base 4 includes a connecting plate 41, a cylindrical plate 42, and supporting ribs 43. The connecting plate 41 has a connecting hole 44, and the connecting plate 41 is fixedly connected to the cylindrical plate 42. The supporting ribs 43 are provided in multiple groups and are circumferentially fixed to the outside of the cylindrical plate 42. The supporting ribs 43 are respectively fixedly connected to the bent plate 13, the connecting plate 41, and the cylindrical plate 42. When in use, the work frame can be placed vertically or horizontally and fastened by installing positioning bolts or embedded bolts in the connecting holes 44.

[0058] The hydraulic cylinder 5 has a cylinder body 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 set away from the support seat 4; the hydraulic cylinder 5 includes a pressure cover 52, which is sleeve-shaped;

[0059] The working motor 6 and the motor bracket 61 are installed outside the pressure cover 52, and the working motor 6 is installed on the motor bracket 61;

[0060] like Figure 7 As shown, it includes a working 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 working 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 working toothed disc 7 opposite to the guide sleeve 54, and the body of the micro switch 101 is provided with a fixing plate 103, which 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 working toothed disc 7; the body of the displacement sensor 102 is provided with a fixing plate 2 104, which is detachably connected to the pressure cover 52; the output end of the displacement sensor 102 abuts against the end face of the working toothed disc 7.

[0061] A pinion 8 is fixedly mounted on the output end of the working motor 6 and meshes with the working gear wheel 7; the tooth width of the pinion 8 is greater than the tooth width of the external tooth profile;

[0062] The position connector 9 has a ball-shaped end and a stepped middle portion, and a mounting hole is provided at the end and can be detachably connected to the end of the piston rod 51 by installing a locking disk 91. The position connector 9 extends outside the workbench 1 and is installed with a connecting disk 92.

[0063] The hydraulic cylinder 5 also includes a cylinder housing 53, which is provided with an oil inlet 531 and an oil outlet 532. One end of the cylinder housing 53 is fixedly connected to the work frame 1. A volume chamber is defined within the cylinder housing 53, and the end of the piston rod 51, which is away from the position connector 9, is mounted within the volume chamber. A guide sleeve 54 is mounted at the end of the cylinder housing 53 and is detachably connected to the cylinder housing 53. The rod body of the piston rod 51 is connected to the cylinder housing 53, the guide sleeve 54, the gland 52, and the working gear disc 7. The gland 52 is provided with a through slot and multiple sets of flat surfaces. The fixing plate 103 is fixedly connected to the gland 52.

[0064] 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 work 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.

[0065] Working methods:

[0066] 1) The piston rod advances a certain distance x, driving the large ring gear meshing with the piston rod to advance synchronously. At this time, the large ring gear and the piston rod are relatively stationary, and the tooth surfaces of the large ring gear and the pinion gear slide relative to each other. Here, the large ring gear advances with the piston rod, while the pinion gear is relatively different. The advancement distance is no greater than the tooth width of the pinion gear, that is, the large ring gear and the pinion gear do not disengage.

[0067] 2) The working motor drives the small gear to rotate, and the small gear drives the large ring gear to rotate. The large ring gear moves backward along the piston rod a distance x;

[0068] 3) Continue to perform steps 1 and 2 for n times until the desired feed distance is reached.

[0069] Each time the large gear ring returns to the position where it fits the gland, the action effect is completed, and each return can support the piston rod, thereby achieving the locking effect of lifting or supporting the hydraulic cylinder.

[0070] Piston rod backward process:

[0071] 4) The working motor drives the small gear to rotate in the opposite direction, and the small gear drives the large ring gear to rotate in the opposite direction. The large ring gear moves forward along the piston rod by a distance x;

[0072] 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 slide relative to each other;

[0073] 6) Continue to execute steps 4 and 5 for n times until the expected retreat distance is reached and return to the initial state.

[0074] During the retreat process, since the piston rod drives the large gear ring to retreat a distance and returns to the position where the pressure cover is fitted, it can achieve the support of the piston rod each time it returns, and achieve the locking effect of the hydraulic cylinder descending or retracting. The single jacking distance can be 0-180mm, achieving step-by-step jacking and locking, which is used to maintain the overall action effect and locking effect, facilitates stability in actual jacking or support, and does not cause sudden retraction problems. Since this embodiment adopts the effect of step-by-step jacking or support, it is different from ordinary jacks and has a lower error rate, reduces the loss rate of supported workpieces, and reduces the occurrence of safety accidents. The structure adopted by the utility model 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.

[0075] Example 2

[0076] like Figure 8-13 As shown, another embodiment of the present invention is shown, based on Example 1, as Figure 11 As shown, the working 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. The toothed portion 71 is provided with an external tooth shape, and the fixing ring 72 is provided with an internal thread. The fixing ring 72 is provided on one side of the external tooth shape relative to the connecting member 9.

[0077] like Figure 8 As shown, the battery control assembly 3 includes a relay box 31, a battery box 32 and a mounting part. The relay box 31 is installed on the top of the battery box 32 and is separated. The mounting part includes a clamping plate 33 and a positioning bolt 34. The clamping plate 33 abuts against the top of the battery box 32. Two sets of positioning bolts 34 are installed at both ends of the clamping plate 33. A threaded hole 121 is opened in the partition box 12, and the positioning bolt 34 is threadedly connected to the threaded hole 121.

[0078] like Figure 9As shown, the hydraulic oil pump assembly 2 includes a high-pressure pump station tank 21, a solenoid 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 tank 21. The solenoid reversing valve 22 is adapted to connect to a pipeline to control the flow of oil within the cylinder housing 53. The hydraulic oil pump assembly may also be equipped with regulating and control components such as a HYDAC-HDA pressure sensor, a QUQ1-10X0.25 air filter, and a CBBALHN balancing valve to ensure hydraulic oil pumping and tank balancing.

[0079] A pull rod displacement sensor is also installed on the cylinder shell, and its output end abuts against the external thread of the piston rod, which is suitable for detecting the displacement distance of the piston rod.

[0080] At the connection point where the connecting plate passes through the work frame, a protective cover can be installed to ensure that external dust or debris will not enter the hydraulic integrated work box. Figure 13 The ball end of the position connector is shown and is secured to the end of the piston rod by a locking disc; Figure 12 The middle pressure cover shows that there are multiple mounting slots and fixing plates on its upper part, which are used to connect with micro switches, displacement sensors and pull rod displacement sensors.

[0081] 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 invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0082] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A step-by-step telescopic mechanical self-locking hydraulic integrated working box, characterized in that: include: A working frame (1), wherein a mounting cavity is provided in the working 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 working 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 pressure cover (52), and the pressure cover (52) is sleeve-shaped; A working motor (6) and a motor bracket (61), wherein the motor bracket (61) is mounted outside the pressure cover (52), and the working motor (6) is mounted on the motor bracket (61); A working toothed disc (7), wherein the working toothed disc (7) is provided with an external tooth shape on the outside and an internal thread on the inside; the piston rod (51) is provided with an external thread, and the working toothed disc (7) is threadedly connected to the piston rod (51); A small gear (8) is fixedly mounted on the output end of the working motor (6), and the small gear (8) is meshed with the working gear disc (7); the tooth width of the small gear (8) is greater than the tooth width of the external tooth profile; A position connector (9), wherein the end of the position connector (9) is spherical, the middle portion is stepped, and a mounting hole is provided at the end thereof and the position connector (9) is detachably connected to the end of the piston rod (51) by installing a locking disk (91). The position connector (9) extends outside the work frame (1) and is installed with a connecting disk (92); The hydraulic cylinder (5) further comprises a cylinder housing (53), on which an oil inlet (531) and an oil outlet (532) are provided; one end of the cylinder housing (53) is fixedly connected to the working frame (1); a volume chamber is provided in the cylinder housing (53), and the end of the piston rod (51) away from the position connector (9) is installed in the volume chamber; a guide sleeve (54) is installed at the end of the cylinder housing (53), and the guide sleeve (54) is detachably connected to the cylinder housing (53); the rod body of the piston rod (51) is connected to the cylinder housing (53), the guide sleeve (54), the pressure cover (52) and the working gear disc (7).

2. A step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 1, characterized in that: The working 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 on the outside. An internal thread is provided on the fixing ring (72), and the fixing ring (72) is provided on one side of the external toothed portion relative to the connecting member (9).

3. A step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 2, characterized in that: The work frame (1) comprises a frame portion (11), a compartment (12) and a bent plate (13), wherein the compartment (12) is installed in the bent plate (13), and the compartment (12) is provided with an opening and is arranged toward a side facing away from the cylinder shell (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 mounted in the compartment box (12).

4. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 3 is characterized in that: 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 position connector (9) to pass through; the diameter of the center hole (19) is smaller than the diameter of the connecting plate (92).

5. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 4 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).

6. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 5, characterized in that: The battery control assembly (3) comprises a relay box (31), a battery box (32) and a mounting member, wherein the relay box (31) is mounted on top of the battery box (32); The mounting member comprises a hoop plate (33) and a positioning bolt (34); the hoop plate (33) abuts against the top of the battery box (32); two sets of positioning bolts (34) are installed at both ends of the hoop plate (33); a threaded hole (121) is provided in the compartment box (12), and the positioning bolt (34) is threadedly connected to the threaded hole (121).

7. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 5, characterized in that: A micro switch (101) and a displacement sensor (102) are installed on one side of the working toothed disc (7) opposite to the guide sleeve (54); a fixing plate (103) is installed on the body of the micro switch (101); and an output end of the micro switch (101) is movably connected to the end surface of the working toothed disc (7); The body of the displacement sensor (102) is equipped with a second fixing plate (104), and the second fixing plate (104) is detachably connected to the pressure cover (52); the output end of the displacement sensor (102) abuts against the end surface of the working gear disc (7).

8. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 5, characterized in that: 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 to a pipeline to control the direction of oil in the cylinder housing (53).

9. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 5, characterized in that: A left cover plate (15) and a right cover plate (16) are detachably mounted on both sides of the work 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).

10. The step-by-step telescopic mechanical self-locking hydraulic integrated working box according to claim 7, characterized in that: The pressure cover (52) is provided with a through slot and a plurality of platform surfaces; the fixing plate (103) is fixedly connected to the pressure cover (52).

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