High-precision jack rod with automatic compensation function

Abstract

The utility model belongs to hoisting equipment technical field discloses a high -precision jack rod with automatic compensation function, including base and fixedly connected main rod on the base, the first sub -rod is sheathed in the main rod, the first sub -rod is sheathed with second sub -rod, the base is fixedly connected with the hydraulic cylinder for driving the first sub -rod and second sub -rod common lifting, the second sub -rod is rotatably connected with the handle for driving the second sub -rod relative to the first sub -rod moves up and down, the utility model discloses the height of the precise adjustment of the jacking of jack is realized through the coarse adjustment of hydraulic cylinder and through the fine adjustment of handle control, solved the traditional equipment repeatedly operating hydraulic handle and difficult to control accurately fine adjustment mode, make high -precision positioning operation become more intuitive and efficient.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and more specifically, to a high-precision jack rod with automatic compensation function. Background Technology

[0002] A jack is a common tool used for lifting heavy objects, widely used in automotive repair, equipment installation, and building support. Its core function is to use mechanical or hydraulic principles to generate a large output force in the vertical direction with a relatively small input force, thereby lifting vehicles, equipment, or structures.

[0003] However, existing hydraulic jacks require repeated operation of the handle to complete the oil pumping process to lift the load. When approaching the target height and needing fine height adjustments, this adjustment method, which relies on the piston stroke of the hydraulic cylinder, is not convenient enough. Operators usually need to control the swing amplitude and speed of the handle very carefully. Even so, it is often difficult to accurately and quickly achieve the required fine adjustment amount. Especially when frequent fine adjustments are required, the adjustment efficiency is very low.

[0004] In view of this, we propose a high-precision jack rod with automatic compensation function. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this utility model is to provide a high-precision jack rod with automatic compensation function to solve the problem of inconvenient operation of existing hydraulic jacks when high-precision fine adjustment is required, as mentioned in the background art.

[0007] 2. Technical Solution

[0008] A high-precision jack rod with automatic compensation function includes a base and a main rod fixedly connected to the base. A first auxiliary rod is sleeved inside the main rod, and a second auxiliary rod is sleeved outside the first auxiliary rod. A hydraulic cylinder for driving the first and second auxiliary rods to rise and fall together is fixedly connected to the base. A handle for driving the second auxiliary rod to move up and down relative to the first auxiliary rod is rotatably connected to the second auxiliary rod.

[0009] Preferably, multiple sliders are fixedly connected to the outside of both the main rod and the second auxiliary rod, and a groove adapted to the size of the slider is formed on the inner wall surface of the first auxiliary rod.

[0010] Preferably, two mounting plates are fixedly connected inside the first auxiliary rod, and a screw is rotatably connected between the two mounting plates. A threaded sleeve is connected to the screw via a ball screw thread. A connecting plate is fixedly connected to the bottom of the second auxiliary rod, and the threaded sleeve is fixedly connected to the connecting plate, so that when the screw rotates, it can drive the second auxiliary rod to move up and down relative to the first auxiliary rod.

[0011] Preferably, a connecting rod is fixedly connected to the screw, a first bevel gear is fixedly connected to the connecting rod, a transmission gear set is fixedly connected to the inner wall of the first auxiliary rod, the handle is fixedly connected to the output end of the transmission gear set, a second bevel gear is fixedly connected to the output end of the transmission gear set, and the first bevel gear and the second bevel gear mesh with each other, so that when the handle is rotated, it can drive the second auxiliary rod to move up and down relative to the first auxiliary rod.

[0012] Preferably, the transmission gear set includes a first gear fixedly connected to the handle and a second gear rotatably connected to the inner wall of the first auxiliary rod. A third gear is fixedly connected to the shaft of the second gear, and a fourth gear is rotatably connected to the inner wall of the first auxiliary rod and meshes with the third gear. The fourth gear is fixedly connected to the second bevel gear.

[0013] Preferably, the first gear and the third gear are the same size, the second gear and the fourth gear are the same size, and the second gear and the fourth gear have significantly more teeth than the first gear and the third gear, so that the handle can precisely adjust the raising and lowering of the second auxiliary rod and the top plate through the transmission gear set.

[0014] Preferably, both the main rod and the second auxiliary rod have channels for moving to avoid the transmission gear set and the connecting plate.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model, by setting up an independent handle drive mechanism and a gear and lead screw transmission system, allows the operator to easily rotate the handle to make fine adjustments to the lifting height. This solves the problem of the laborious and difficult-to-precise fine-tuning method of repeatedly operating the hydraulic handle in traditional equipment, making high-precision positioning operation more intuitive and efficient.

[0018] 2. The hydraulic cylinder of this utility model provides a powerful initial lifting force, responsible for rapid adjustment of large stroke and high load, while the independent second auxiliary rod manual fine adjustment mechanism is used for small-range height compensation after hydraulic coarse adjustment. The two systems work together to enable the jack to combine the efficiency advantage of hydraulic lifting with the precision advantage of manual screw adjustment, effectively solving the problem of single hydraulic adjustment in precise positioning.

[0019] 3. This utility model improves the precision of the adjusting screw rotation by setting the gear transmission ratio. At the same time, the sliding guide structure formed by the slider and the slide groove ensures that the main rod and the two auxiliary rods maintain stable and precise linear motion during lifting and fine adjustment, effectively avoiding lateral deviation and ensuring the stability of the device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the first auxiliary rod of this utility model;

[0023] Figure 4 This is a bottom view of the second auxiliary rod of this utility model.

[0024] The following are the labels in the diagram: 1. Base, 2. Main rod, 3. First auxiliary rod, 4. Second auxiliary rod, 41. Top plate, 5. Hydraulic cylinder, 6. Handle, 7. Mounting plate, 8. Screw, 9. Screw sleeve, 10. Connecting plate, 11. Slider, 12. Slide groove, 13. Transmission gear set, 131. First gear, 132. Second gear, 133. Third gear, 134. Fourth gear, 14. First bevel gear, 15. Second bevel gear, 16. Connecting rod, 17. Channel. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1-4 This utility model provides a technical solution:

[0029] A high-precision jack rod with automatic compensation function includes a base 1 and a main rod 2 fixedly connected to the base 1. A first auxiliary rod 3 is sleeved inside the main rod 2, and a second auxiliary rod 4 is sleeved outside the first auxiliary rod 3. A hydraulic cylinder 5 is fixedly connected to the base 1 for driving the first auxiliary rod 3 and the second auxiliary rod 4 to rise and fall together. A handle 6 is rotatably connected to the second auxiliary rod 4 for driving the second auxiliary rod 4 to move up and down relative to the first auxiliary rod 3. With this configuration, through the nested structure of the main rod 2, the first auxiliary rod 3, and the second auxiliary rod 4 and the joint drive of the hydraulic cylinder 5, a large stroke coarse adjustment of the top plate 41 is achieved, laying the structural foundation for precision fine adjustment, and the overall structure is compact and stable.

[0030] Multiple sliders 11 are fixedly connected to the outside of the main rod 2 and the second auxiliary rod 4. The inner wall of the first auxiliary rod 3 is provided with a groove 12 that matches the size of the slider 11. With this arrangement, the sliding guide mechanism formed by the slider 11 and the groove 12 ensures that the main rod 2 and the first auxiliary rod 3, and the first auxiliary rod 3 and the second auxiliary rod 4 can only move in a relatively straight line in the vertical direction, effectively preventing deviation during the lifting process and ensuring the stability and accuracy of the lifting and fine-tuning process.

[0031] Specifically, the first auxiliary rod 3 has two mounting plates 7 fixedly connected inside, and a screw 8 is rotatably connected between the two mounting plates 7. A screw sleeve 9 is threadedly connected to the screw 8 through a ball screw pair. The bottom of the second auxiliary rod 4 is fixedly connected to a connecting plate 10, and the screw sleeve 9 is fixedly connected to the connecting plate 10. This allows the screw 8 to rotate and drive the second auxiliary rod 4 to move up and down relative to the first auxiliary rod 3. In this configuration, the rotational motion of the screw 8 is converted into the linear motion of the screw sleeve 9 by the ball screw pair, so that the positioning accuracy of the second auxiliary rod 4 relative to the first auxiliary rod 3 has a certain degree of precision.

[0032] Secondly, a connecting rod 16 is fixedly connected to the screw 8, and a first bevel gear 14 is fixedly connected to the connecting rod 16. A transmission gear set 13 is fixedly connected to the inner wall of the first auxiliary rod 3. The handle 6 is fixedly connected to the output end of the transmission gear set 13, and a second bevel gear 15 is fixedly connected to the output end of the transmission gear set 13. The first bevel gear 14 and the second bevel gear 15 mesh with each other, so that when the handle 6 rotates, it can drive the second auxiliary rod 4 to move up and down relative to the first auxiliary rod 3. With this configuration, the horizontal rotational power of the output shaft of the transmission gear set 13 is transmitted to the connecting rod 16 perpendicular to it through the bevel gear, realizing the conversion of the power direction. This allows the handle 6 located on the side to conveniently drive the internal screw 8 to rotate for vertical fine adjustment.

[0033] Furthermore, the transmission gear set 13 includes a first gear 131 fixedly connected to the handle 6 and a second gear 132 rotatably connected to the inner wall of the first auxiliary rod 3. A third gear 133 is fixedly connected to the shaft of the second gear 132. A fourth gear 134, which meshes with the third gear 133, is rotatably connected to the inner wall of the first auxiliary rod 3. The fourth gear 134 is fixedly connected to the second bevel gear 15. This arrangement, using a multi-stage gear transmission structure, can amplify the transmission ratio within a limited space, allowing the operator to drive the fine-tuning mechanism to produce small displacement changes, thus improving the precision of the fine-tuning operation.

[0034] Furthermore, the first gear 131 and the third gear 133 are the same size, and the second gear 132 and the fourth gear 134 are the same size. Moreover, the second gear 132 and the fourth gear 134 have significantly more teeth than the first gear 131 and the third gear 133. This allows the handle 6 to precisely adjust the raising and lowering of the second auxiliary rod 4 and the top plate 41 through the transmission gear set 13. This arrangement, through the meshing of small and large number of teeth, increases the reduction ratio of the entire transmission system, amplifies the adjustment effect of the operating handle 6, and makes the precise fine-tuning control of the load height more intuitive and precise.

[0035] In addition, both the main rod 2 and the second auxiliary rod 4 are provided with channels 17 for moving to avoid the transmission gear set 13 and the connecting plate 10. This arrangement can prevent the rotation shaft of the mounting plate 7 and the transmission gear set 13 from affecting the movement between the rods.

[0036] It is important to note that after the jack achieves initial lifting and locks the load height through the hydraulic cylinder 5, if a slight settlement occurs in the support height due to factors such as load deformation within the hydraulic system, the operator does not need to depressurize and reset the entire system. Instead, they can simply rotate the handle 6 on the second auxiliary rod 4 to slightly raise the second auxiliary rod 4 via the transmission gear set 13 and the screw 8 assembly to compensate. This process can maintain the original load-bearing state while quickly compensating for the lost height difference, restoring the load to the target position. Compared to the complex steps of traditional hydraulic jacks that require complete depressurization and re-lifting, this solution can achieve settlement correction with just the single action of manually rotating the handle 6, essentially forming a semi-automatic compensation mechanism.

[0037] Working principle:

[0038] When using this device, the hydraulic cylinder 5 is operated to push the first auxiliary rod 3 nested inside the main rod 2, which is fixedly connected to the base 1, and the second auxiliary rod 4 sleeved outside the first auxiliary rod 3 to move upward together, thereby achieving preliminary adjustment, that is, coarse adjustment. When the load reaches close to the target height and further fine adjustment is required, the operator rotates the handle 6 set on the second auxiliary rod 4. The rotation of the handle 6 is decelerated and transmitted through the transmission gear set 13 composed of the first gear 131, the second gear 132, the third gear 133, and the fourth gear 134. Subsequently, it drives the second bevel gear 15 fixed at the output end of the gear set to rotate. The first bevel gear 14 meshing with it drives the connecting rod 16 fixed to it and the screw 8 connected to it to rotate together. Since the screw 8 cooperates with the screw sleeve 9 connected through the ball screw pair, the rotation of the screw 8 is converted into the linear lifting and lowering motion of the screw sleeve 9. The screw sleeve 9 is connected to the connecting plate 10 fixed at the bottom of the second auxiliary rod 4, thereby driving the second auxiliary rod 4 to make precise vertical displacement adjustment relative to the fixed first auxiliary rod 3, that is, fine adjustment.

[0039] It should be noted that during the entire lifting and fine-tuning process, the slider 11 set outside the main rod 2 and the second auxiliary rod 4 closely cooperates with the slide groove 12 opened on the inner wall of the first auxiliary rod 3, providing stable and reliable linear guidance and ensuring smooth and unbiased movement. At the same time, the avoidance channel 17 opened on the main rod 2 and the second auxiliary rod 4 ensures that the internal transmission gear set 13 and the connecting plate 10 will not interfere during the stroke, ensuring stable operation of the device.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision jack rod with automatic compensation function, characterized in that: It includes a base (1) and a main rod (2) fixedly connected to the base (1). A first auxiliary rod (3) is sleeved inside the main rod (2), and a second auxiliary rod (4) is sleeved outside the first auxiliary rod (3). A hydraulic cylinder (5) is fixedly connected to the base (1) for driving the first auxiliary rod (3) and the second auxiliary rod (4) to rise and fall together. A handle (6) is rotatably connected to the second auxiliary rod (4) for driving the second auxiliary rod (4) to move up and down relative to the first auxiliary rod (3).

2. The high-precision jack rod with automatic compensation function as described in claim 1, characterized in that: Multiple sliders (11) are fixedly connected to the outside of the main rod (2) and the second auxiliary rod (4). A groove (12) adapted to the size of the slider (11) is opened on the inner wall surface of the first auxiliary rod (3).

3. The high-precision jack rod with automatic compensation function as described in claim 1, characterized in that: The first auxiliary rod (3) is fixedly connected to two mounting plates (7), and a screw (8) is rotatably connected between the two mounting plates (7). A screw sleeve (9) is connected to the screw (8) through a ball screw thread. A connecting plate (10) is fixedly connected to the bottom of the second auxiliary rod (4). The screw sleeve (9) is fixedly connected to the connecting plate (10), so that when the screw (8) rotates, it can drive the second auxiliary rod (4) to move up and down relative to the first auxiliary rod (3).

4. The high-precision jack rod with automatic compensation function as described in claim 3, characterized in that: A connecting rod (16) is fixedly connected to the screw (8), and a first bevel gear (14) is fixedly connected to the connecting rod (16). A transmission gear set (13) is fixedly connected to the inner wall of the first auxiliary rod (3). The handle (6) is fixedly connected to the output end of the transmission gear set (13). A second bevel gear (15) is fixedly connected to the output end of the transmission gear set (13). The first bevel gear (14) and the second bevel gear (15) mesh with each other, so that when the handle (6) rotates, it can drive the second auxiliary rod (4) to move up and down relative to the first auxiliary rod (3).

5. The high-precision jack rod with automatic compensation function as described in claim 4, characterized in that: The transmission gear set (13) includes a first gear (131) fixedly connected to the handle (6) and a second gear (132) rotatably connected to the inner wall of the first auxiliary rod (3). A third gear (133) is fixedly connected to the shaft of the second gear (132). A fourth gear (134) is rotatably connected to the inner wall of the first auxiliary rod (3) and meshes with the third gear (133). The fourth gear (134) is fixedly connected to the second bevel gear (15).

6. The high-precision jack rod with automatic compensation function as described in claim 5, characterized in that: The first gear (131) and the third gear (133) are the same size, the second gear (132) and the fourth gear (134) are the same size, and the second gear (132) and the fourth gear (134) have significantly more teeth than the first gear (131) and the third gear (133), so that the handle (6) can precisely adjust the raising and lowering of the second auxiliary rod (4) and the top plate (41) through the transmission gear set (13).

7. The high-precision jack rod with automatic compensation function as described in claim 6, characterized in that: Both the main rod (2) and the second auxiliary rod (4) are provided with channels (17) for moving to avoid the transmission gear set (13) and the connecting plate (10).

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