Automatic leveling hydraulic device

Abstract

The utility model relates to the technical field of leveling, and discloses an automatic leveling hydraulic device which is characterized in that pressure balance and abrasion reduction are realized through structures such as a supporting disc, a bearing disc and a 3-RPS parallel mechanism, a small hydraulic cylinder is started according to angle inclination of the ground, the small hydraulic cylinder pushes a ball head through an output shaft, and the ball head is automatically leveled. One side, pushed by the 3-RPS parallel mechanisms, of the supporting disc is inclined, the extending length of each 3-RPS parallel mechanism is adjusted, the bottom face of the supporting disc makes complete contact with the ground, friction force maximization is achieved, the multiple 3-RPS parallel mechanisms are arranged to be used for reducing pressure of a single connecting column, meanwhile, the position of the supporting disc is fixed through ejection of a ball head, and therefore the supporting disc can be fixed. And the position deviation of the supporting disc in actual use is avoided, the more accurate leveling effect is achieved, and the effects of balancing pressure and reducing loss are achieved.

Description

Technical Field

[0001] This utility model relates to the field of leveling technology, and in particular to an automatic leveling hydraulic device. Background Technology

[0002] A hydraulic automatic leveling device is a commonly used auxiliary device in hydraulic systems. It can be used to balance the simultaneous lifting and lowering of two or more hydraulic cylinders. When two or more cylinders lift and lower simultaneously, the pressure in different oil circuits will differ, resulting in different lifting and lowering speeds and ultimately causing tilting. The hydraulic automatic leveling device senses this difference and adjusts the flow of hydraulic oil to keep the pressure in each oil circuit consistent, thus ensuring balanced lifting and lowering of the cylinders. In practice, automatic leveling devices are frequently used in lifting platforms.

[0003] In the existing technology, there are certain shortcomings of the automatic leveling hydraulic device. For example, the output shaft end of the hydraulic cylinder is a ball, which is directly connected to the ball sleeve. The bottom of the ball sleeve is supported on the ground. Due to the single support rod, the gap between the ball and the ball sleeve increases due to long-term load impact. After leveling, the platform will have slight sway. Moreover, when leveling the platform, the extension and retraction accuracy of the hydraulic cylinder is not high, and it is quite cumbersome when high-precision leveling is required. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an automatic leveling hydraulic device that has the advantages of avoiding wear and achieving high leveling accuracy, thus solving the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: an automatic leveling hydraulic device, including a bearing platform, on which bubble levels are fixedly installed on the four sides; two six-dimensional force sensors are symmetrically fixedly installed inside the bearing platform; two balance boxes are symmetrically fixedly installed at the bottom of the bearing platform, with the balance boxes located on one side of the six-dimensional force sensors; a support plate is provided at the bottom of the balance box; a frame block is uniformly fixedly installed in a circular shape on the bottom surface of the support plate; a connecting column is provided in the middle of the bottom surface of the support plate; a ball is provided at the end of the connecting column; a support plate is provided below the support plate; a bushing A is provided at the top of the support plate; the ball at the end of the connecting column is located inside the bushing A; a retainer A is provided between the outer ring of the connecting column and the inner ring of the bushing A; the retainer A is sized to match the bushing A and the connecting column; and a 3-RPS parallel mechanism connects the support plate and the support plate.

[0006] With the above structural setup, the coarse and fine adjustments of the leveling function are achieved through the hydraulic cylinder A and servo motor inside the balance box. The hydraulic cylinder A extends its output shaft to move the support plate and the support plate as a whole, and makes a coarse adjustment to the horizontal position of the bearing platform. Then, by starting the servo motor and through the transmission of gear B and gear A, a high-precision adjustment of the horizontal adjustment of the bearing platform is achieved.

[0007] Preferably, one side of the balance box has a sliding groove, and the inside of the balance box has symmetrically formed side grooves. A rotating rod is rotatably installed between the top wall and the bottom wall of the side groove. A gear A is fixedly sleeved on the outer ring of the rotating rod, and a threaded groove is formed on the outer ring of the rotating rod below the gear A.

[0008] With the above structural design, when the rotating rod rotates, it can drive the hydraulic cylinder A to slide up and down on the outer ring through the threaded groove of its outer ring, thereby improving the accuracy of horizontal adjustment.

[0009] Preferably, a hydraulic cylinder A is slidably installed inside the balance box. The output shaft end of the hydraulic cylinder A is fixedly connected to the top surface of the support plate. An oil pipe is provided on one side of the top of the hydraulic cylinder A inside the slide groove. Lugs are provided on both sides of the top of the hydraulic cylinder A. The lugs are threadedly sleeved on the outer ring of the rotating rod inside the side groove. The inner ring of the lugs and the outer ring of the rotating rod are threadedly matched.

[0010] With the above structural design, hydraulic cylinder A can roughly adjust the level of the bearing platform by controlling the extension length of the output shaft, and hydraulic cylinder A can achieve more precise up and down sliding by threading the lugs onto the outer ring of the rotating rod.

[0011] Preferably, a servo motor is fixedly installed inside the balance box above the hydraulic cylinder A. The output shaft of the servo motor is connected to a gear B via a coupling. The gear B and gear A are at the same height and mesh with each other.

[0012] With the above structural setup, the output shaft of the servo motor drives gear B to rotate through the coupling. Gear B, through meshing with gear A, drives the rotating rod to rotate. When the rotating rod rotates, the drive lug slides up and down on the outer ring of the rotating rod, thus enabling the servo motor to drive the hydraulic cylinder A to slide up and down.

[0013] Preferably, the top of the support plate is provided with bushings B in a circular shape, the number of bushings B corresponds to the number of support blocks, and a retainer B is movably installed on the inner ring of the bushing B.

[0014] With the above structural design, the support plate forms a spherical bearing by fitting bushing A with the connecting column and bushing B with the ball head, thereby improving the connection strength of bushing A and bushing B.

[0015] Preferably, the 3-RPS parallel mechanism includes a small hydraulic cylinder and a ball head. The number of the 3-RPS parallel mechanism corresponds to the number of the frame blocks and bushings B. The tail of the small hydraulic cylinder is rotatably installed inside the frame block. The output shaft end of the small hydraulic cylinder is provided with a ball head. The ball head is located inside the cage B. The outer ring of the ball head is adapted to the size of the inner ring of the cage B.

[0016] With the above-described structure, the small hydraulic cylinder adjusts the different tilt angles of the support plate by controlling the extension and retraction of the output shaft.

[0017] This utility model has the following advantages:

[0018] 1. This automatic leveling hydraulic device achieves pressure balance and reduces wear through a structure consisting of a support plate, a bearing plate, and a 3-RPS parallel mechanism. A small hydraulic cylinder is activated based on the ground's angle of inclination. The small hydraulic cylinder pushes the ball head through its output shaft, causing the side of the support plate pushed by the 3-RPS parallel mechanism to tilt. By adjusting the extension length of each 3-RPS parallel mechanism, the bottom surface of the support plate is made into complete contact with the ground, maximizing friction. Multiple 3-RPS parallel mechanisms are used to reduce the pressure on individual connecting columns. Simultaneously, the ball head's extension fixes the position of the support plate, preventing positional shifts during actual use and achieving a more precise leveling effect, thus balancing pressure and reducing wear.

[0019] 2. This automatic leveling hydraulic device, through the setting of a balance box, hydraulic cylinder A, servo motor, and other structures, achieves coarse and fine adjustments for leveling the load-bearing platform. Activating hydraulic cylinder A on the lower side causes its output shaft to drive the support plate downwards, pushing it down. After the support plate contacts the ground, the internal pressure of hydraulic cylinder A is maintained, ensuring its position is basically stable. The user then activates the servo motor. The output shaft of the servo motor drives gear B to rotate via a coupling. When gear B rotates, it meshes with gear A, causing the rotating rod to rotate synchronously. Because the rotating rod is threadedly connected to the lug, the lug causes hydraulic cylinder A to slide up and down on the outer ring of the rotating rod, achieving precise adjustment of the load-bearing platform's balance, thus achieving both coarse and fine adjustments during leveling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the balance box of this utility model;

[0022] Figure 3 This is a schematic diagram of the interior of the destruction box structure of this utility model from another perspective;

[0023] Figure 4This is an exploded view of the 3-RPS parallel mechanism structure of this utility model.

[0024] In the diagram: 1. Bearing platform; 2. Bubble level; 3. Six-dimensional force sensor; 4. Balance box; 41. Slide groove; 42. Side groove; 43. Rotating rod; 44. Gear A; 45. Hydraulic cylinder A; 46. Oil pipe; 47. Ear block; 48. Servo motor; 49. Gear B; 5. Support plate; 51. Frame block; 52. Connecting column; 6. Support plate; 61. Bushing A; 62. Cage A; 63. Bushing B; 64. Cage B; 7. 3-RPS parallel mechanism; 71. Small hydraulic cylinder; 72. Ball head. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 An automatic leveling hydraulic device includes a support platform 1. Bubble levels 2 are fixedly installed on the four sides of the support platform 1. The bubble levels 2 are external leveling devices, allowing users to determine the specific leveling angle during leveling. Two six-dimensional force sensors 3 are symmetrically fixedly installed inside the support platform 1. During operation, the six-dimensional force sensors 3 detect their own tilt angle to determine whether the platform is level. Two balance boxes 4 are symmetrically fixedly installed at the bottom of the support platform 1, located to one side of the six-dimensional force sensors 3. The bottom is provided with a support plate 5, and the bottom surface of the support plate 5 is uniformly fixed with a frame block 51 in a circular shape. A connecting column 52 is provided in the middle of the bottom surface of the support plate 5, and a ball is provided at the end of the connecting column 52. A support plate 6 is provided below the support plate 5, and a bushing A61 is provided on the top of the support plate 6. The ball at the end of the connecting column 52 is located inside the bushing A61. A retainer A62 is provided between the outer ring of the connecting column 52 and the inner ring of the bushing A61. The retainer A62 is sized to match the bushing A61 and the connecting column 52. A 3-RPS parallel mechanism 7 is connected between the support plate 6 and the support plate 5.

[0027] In actual use, this device achieves coarse and fine adjustments to the leveling function through the hydraulic cylinder A45 and servo motor 48 inside the balance box 4. The hydraulic cylinder A45 extends its output shaft to move the support plate 5 and the support plate 6 as a whole, so that the bottom surface of the support plate 6 is in contact with the ground, and the horizontal position of the bearing platform 1 is roughly adjusted. Then, by starting the servo motor 48, the hydraulic cylinder A45 slides up and down inside the side groove 42 through the transmission of gear B49 and gear A44, achieving high-precision adjustment of the horizontal adjustment of the bearing platform 1, so that the leveling state of the bearing platform 1 has two different precision adjustments.

[0028] The position and angle of the support plate 6 are limited by setting a 3-RPS parallel mechanism 7. At the same time, the 3-RPS parallel mechanism 7 reduces the pressure on the connecting column 52 between the support plate 6 and the support plate 5. The setting of the 3-RPS parallel mechanism 7 can balance the pressure between the ball head 72 and the connecting column 52, so that it has a longer service life. In addition, since the bushing B63 and the ball head 72 are fitted together as a spherical bearing, and the connecting column 52 and the bushing A61 are fitted together as a spherical bearing, higher strength is achieved.

[0029] Please see Figures 1-3 The balance box 4 has a sliding groove 41 on one side and side grooves 42 symmetrically opened inside the balance box 4. A rotating rod 43 is rotatably installed between the top wall and the bottom wall of the side groove 42. A gear A44 is fixedly sleeved on the outer ring of the rotating rod 43. A threaded groove is opened on the outer ring of the rotating rod 43 below the gear A44.

[0030] When the rotating rod 43 rotates, it can drive the hydraulic cylinder A45 to slide up and down on the outer ring through the threaded groove of its outer ring, thereby improving the accuracy of the horizontal adjustment.

[0031] Please see Figures 1-3 A hydraulic cylinder A45 is slidably installed inside the balance box 4. The output shaft end of the hydraulic cylinder A45 is fixedly connected to the top surface of the support plate 5. An oil pipe 46 is provided on one side of the top of the hydraulic cylinder A45 inside the slide groove 41. Lugs 47 are provided on both sides of the top of the hydraulic cylinder A45. The lugs 47 are threadedly connected to the outer ring of the rotating rod 43 inside the side groove 42. The threads between the inner ring of the lugs 47 and the outer ring of the rotating rod 43 are compatible.

[0032] Hydraulic cylinder A45 achieves a rough adjustment of the level of the bearing platform 1 by controlling the extension length of the output shaft. Hydraulic cylinder A45 is threadedly connected to the outer ring of the rotating rod 43 through lug 47, achieving a more precise up and down sliding.

[0033] Please see Figures 1-3Inside the balance box 4, a servo motor 48 is fixedly installed above the hydraulic cylinder A45. The output shaft of the servo motor 48 is connected to a gear B49 via a coupling. Gear B49 and gear A44 are at the same height and mesh with each other. After the servo motor 48 starts, its output shaft drives gear B49 to rotate via the coupling. Gear B49, through meshing with gear A44, drives the rotating rod 43 to rotate. When the rotating rod 43 rotates, the drive lug 47 slides up and down on the outer ring of the rotating rod 43, so that the servo motor 48 can drive the hydraulic cylinder A45 to slide up and down. By driving the hydraulic cylinder A45 to slide up and down through the servo motor 48, the position of the hydraulic cylinder A45 can be finely adjusted, achieving high-precision adjustment.

[0034] Please see Figures 1-4 The top of the support plate 6 is uniformly provided with bushings B63 in a circular shape. The number of bushings B63 corresponds to the number of bracket blocks 51. A retainer B64 is movably installed on the inner ring of the bushing B63.

[0035] The support plate 6 forms a spherical bearing by fitting bushing A61 with connecting column 52 and bushing B63 with ball head 72, thereby improving the connection strength of bushing A61 and bushing B63 and avoiding redundant clearance during long-term use. At the same time, the fit between bushing A61 and connecting column 52 and between bushing B63 and ball head 72 can achieve the effect of balancing the bearing pressure and extending the service life of connecting column 52 and support plate 6.

[0036] Please see Figures 1-4 The 3-RPS parallel mechanism 7 includes a small hydraulic cylinder 71 and a ball head 72. The number of 3-RPS parallel mechanisms 7 corresponds to the number of bracket blocks 51 and bushings B63. The tail of the small hydraulic cylinder 71 is rotatably installed inside the bracket block 51. The output shaft end of the small hydraulic cylinder 71 is provided with a ball head 72, which is located inside the cage B64. The outer ring of the ball head 72 is adapted to the inner ring size of the cage B64.

[0037] The small hydraulic cylinder 71 adjusts the different tilt angles of the support plate 6 by controlling the extension and retraction of the output shaft. The small hydraulic cylinder 71 drives the ball head 72 to extend and retract. Since the position of the ball head 72 is limited inside the bushing B63, the ball head 72 can move inside the bushing B63 when it moves, so as to realize the tilt adjustment of the support plate 6 at different angles.

[0038] Working Principle: During use, the device is moved to the desired position. Due to varying ground heights, one side of the device may tilt. This tilt is detected by the six-dimensional force sensor 3, which then activates the lower-side hydraulic cylinder A45. Hydraulic cylinder A45, through its output shaft, moves the support plate 5 downwards, pushing the support plate 6 downwards. When the support plate 6 contacts the ground, due to the ground's tilt angle, the small hydraulic cylinder 71 is activated based on this angle. The small hydraulic cylinder 71, through its output shaft, advances the ball head 72, causing the side of the support plate 6 pushed by the 3-RPS parallel mechanism 7 to tilt. By adjusting the extension length of each 3-RPS parallel mechanism 7, complete contact between the bottom surface of the support plate 6 and the ground is achieved, maximizing friction. Multiple 3-RPS parallel mechanisms 7 are used to reduce the pressure on a single connecting column 52, while the extension of the ball head 72 further enhances the friction. The position of the support plate 6 is fixed to prevent it from shifting during actual use, thus achieving a more precise leveling effect. When the hydraulic cylinder A45 moves the support platform 1 close to balance, the internal pressure of the hydraulic cylinder A45 is maintained to keep its position basically stable. The user then starts the servo motor 48. The output shaft of the servo motor 48 drives the gear B49 to rotate through the coupling. When the gear B49 rotates, it drives the rotating rod 43 to rotate synchronously through meshing with the gear A44. Since the rotating rod 43 is threadedly connected to the lug 47, the lug 47 will drive the hydraulic cylinder A45 to slide up and down on the outer ring of the rotating rod 43, thereby achieving precise adjustment of the balance of the support platform 1. During use, the hydraulic cylinder A45 is used to achieve coarse adjustment of the position and height. When the position is basically balanced, the servo motor 48 is started to drive the hydraulic cylinder A45 to move up and down on the outer ring of the rotating rod 43 to achieve fine adjustment of precision, making the balance accuracy of the support platform 1 higher.

Claims

1. An automatic levelling hydraulic device comprising a load bearing platform (1), characterised in that: The four edges of the bearing platform (1) are fixedly installed with bubble levels (2), the inside of the bearing platform (1) is fixedly installed with two six-dimensional force sensors (3) in a symmetrical manner, the bottom of the bearing platform (1) is fixedly installed with two balance boxes (4) in a symmetrical manner, the balance box (4) is located on one side of the six-dimensional force sensor (3), the bottom of the balance box (4) is provided with a support disc (5), the bottom surface of the support disc (5) is uniformly fixedly installed with frame blocks (51) in a circular ring shape, the middle of the bottom surface of the support disc (5) is provided with a connecting column (52), the end of the connecting column (52) is provided with a ball, the lower side of the support disc (5) is provided with a support disc (6), the top of the support disc (6) is provided with a shaft sleeve A (61), the ball at the end of the connecting column (52) is located inside the shaft sleeve A (61), a retainer A (62) is arranged between the outer ring of the connecting column (52) and the inner ring of the shaft sleeve A (61), the retainer A (62) is matched in size with the shaft sleeve A (61) and the connecting column (52), and the support disc (6) is connected with the support disc (5) through a 3-RPS parallel mechanism (7).

2. An automatic levelling hydraulic device according to claim 1, characterised in that: One side of the balance box (4) is provided with a sliding groove (41), the inside of the balance box (4) is provided with a side groove (42) in a symmetrical manner, a rotating rod (43) is rotatably installed between the top wall and the bottom wall of the side groove (42), a gear A (44) is fixedly sleeved on the outer ring of the rotating rod (43), and a threaded groove is formed below the gear A (44) on the outer ring of the rotating rod (43).

3. An automatic levelling hydraulic device according to claim 2, characterised in that: A hydraulic cylinder A (45) is slidably installed in the inside of the balance box (4), the output shaft end of the hydraulic cylinder A (45) is fixedly connected with the top surface of the support disc (5), an oil pipe (46) is arranged on one side of the top of the hydraulic cylinder A (45) and located in the inside of the sliding groove (41), ear blocks (47) are arranged on both sides of the top end of the hydraulic cylinder A (45) and threadedly sleeved on the outer ring of the rotating rod (43) and located in the inside of the side groove (42), and the inner ring of the ear block (47) is threadedly matched with the outer ring of the rotating rod (43).

4. An automatic levelling hydraulic device according to claim 3, characterised in that: A servo motor (48) is fixedly installed above the hydraulic cylinder A (45) in the inside of the balance box (4), a gear B (49) is drivingly connected with the output shaft of the servo motor (48) through a shaft coupling, the gear B (49) is located at the same height as the gear A (44), and the gear B (49) is engaged with the gear A (44).

5. An automatic levelling hydraulic device according to claim 3, characterised in that: The top of the support disc (6) is uniformly provided with shaft sleeves B (63) in a circular ring shape, the number of the shaft sleeves B (63) corresponds to the number of the frame blocks (51), and the inner ring of the shaft sleeve B (63) is movably installed with a retainer B (64).

6. An automatic levelling hydraulic device according to claim 5, characterised in that: The 3-RPS parallel mechanism (7) includes a small hydraulic cylinder (71) and a ball head (72), the number of the 3-RPS parallel mechanism (7) corresponds to the number of the frame block (51) and the shaft sleeve B (63), the tail of the small hydraulic cylinder (71) is rotatably installed in the frame block (51), the output shaft end of the small hydraulic cylinder (71) is provided with the ball head (72), the ball head (72) is located in the retainer B (64), and the outer circle of the ball head (72) is matched with the size of the inner circle of the retainer B (64).

Images