Lifting device

Abstract

The utility model provides a lifting device, which belongs to the technical field of transmission equipment, and comprises a mounting seat, a driving part, a piston rod and a sliding guide part, the driving piece is rotatably arranged in the supporting pipe, a movable block is in threaded connection with the driving piece, and the movable block is configured to move in the height direction of the driving piece along with rotation of the driving piece; the piston rod extends into the supporting pipe and is fixedly connected with the movable block, and the piston rod synchronously moves along with the movable block; the sliding guide part is arranged between the outer wall of the movable block and the inner wall of the supporting pipe, fixedly connected with the movable block and slidably connected with the supporting pipe in an abutting mode. According to the lifting device, the rotating driving part is arranged in the supporting pipe, and the sliding guiding part is in sliding abutting connection with the supporting pipe, so that the supporting pipe plays a role in supporting and guiding at the same time, and the supporting strength of displacement of the piston rod is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of transmission equipment, in particular to a lifting device. Background Art

[0002] In the related art, the lifting system of a truck driver generally realizes the lifting action of the cab through a hydraulic lifting cylinder or a ball screw lifter.

[0003] The hydraulic lifting cylinder is connected to the electric pump and the car battery by a wiring harness. The control valve controls the hydraulic oil generated by the electric pump or manual pump to enter the lifting cylinder. The piston rod of the lifting cylinder moves up and down, driving the cab up and down. Ball screw lifting is to click and drive the gear to drive the ball screw to rotate, pushing the cab up and down.

[0004] However, in cold areas, the hydraulic oil's viscosity increases at low temperatures, making it difficult to flow, causing the hydraulic cylinder's power output to be blocked, affecting the normal lifting action of the cab; and when using a ball screw lifter, the ball screw itself has a more complex structure, with higher installation and maintenance costs, and strict requirements on the use environment, which is not conducive to large-scale use and promotion. Utility Model Content

[0005] Based on this, an embodiment of the present application provides a lifting device to solve the problem in the related art that the lifting device is greatly limited in use due to environmental influences.

[0006] The present application provides a lifting device, comprising:

[0007] A mounting seat, on which a support tube is fixedly provided;

[0008] A driving member is rotatably disposed in the support tube, a movable block is threadedly connected to the driving member, and the movable block is configured to move along the height direction of the driving member as the driving member rotates;

[0009] A piston rod extends into the support tube and is fixedly connected to the movable block, and the piston rod moves synchronously with the movable block;

[0010] The slide guide component is arranged between the outer wall of the movable block and the inner wall of the support tube. The slide guide component is fixedly connected to the movable block and slidably abuts against the support tube.

[0011] In a possible implementation manner, an outer wall of the movable block is provided with a mounting groove, the sliding guide component is arranged in the mounting groove, and a notch of the mounting groove is flush with a surface of the sliding guide component.

[0012] In a possible implementation manner, the outer wall of the movable block is slidably abutted against the inner wall of the support tube.

[0013] In a possible implementation manner, a mounting cavity is provided in the mounting seat, and the lifting device further includes:

[0014] A driving component having a rotating output end, wherein the output end extends into the mounting cavity;

[0015] A transmission assembly is disposed in the installation cavity, and the transmission assembly is connected to the output end and the driving member respectively. The transmission assembly is configured to adjust the initial rotation speed of the output end to the transmission rotation speed, and to make the driving member rotate according to the transmission rotation speed; wherein the initial rotation speed is greater than the transmission rotation speed.

[0016] In a possible implementation, the transmission assembly includes:

[0017] A first transmission tooth is meshed and connected with the output end, and a second transmission tooth is coaxially stacked on the first transmission tooth;

[0018] The third transmission tooth is fixedly connected to the driving member and meshed with the second transmission tooth; the outer diameter of the third transmission tooth is greater than the outer diameter of the second transmission tooth.

[0019] In a possible implementation manner, the driving component is a driving motor, and the axis of the output end of the driving component is parallel to the axis of the driving member.

[0020] In a possible implementation, it further includes:

[0021] At least one travel limit switch is arranged on the support tube, and the travel limit switch is used to limit the extreme position of the displacement of the movable block.

[0022] In a possible implementation manner, the mounting seat includes an upper base and a lower base that are butt-jointed, and the upper base and the lower base together form the mounting cavity.

[0023] In a possible implementation manner, a collar is embedded in the inner wall of one end of the support tube away from the mounting seat, a wear-resistant ring is fixed to the inner wall of the collar, and the wear-resistant ring abuts against the piston rod.

[0024] In a possible implementation manner, an upper lifting ear is fixed to one end of the piston rod away from the mounting seat, and a lower lifting ear is fixed to the mounting seat.

[0025] The lifting device provided in the embodiment of the present application utilizes a rotating driving member to drive the piston rod to move in the height direction. Compared with the hydraulic lifting cylinder in the related art, the structure of the driving member and the piston rod cooperating in lifting and lowering can avoid the intervention of the oil cylinder and there is no need to consider the use environment of the hydraulic oil medium, thereby being able to adapt to more severe working environments; in addition, due to the provision of a support tube, during the lifting and lowering process of the piston rod, the guide sliding member and the support tube can be slidably abutted, and part of the piston rod is located in the support tube, and an axial fit is formed with the support tube through the guide sliding member, so that the support tube simultaneously plays a supporting and guiding effect, effectively ensuring the lifting and lowering stability and support strength of the piston rod, and improving the use effect of the lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model 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, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A schematic diagram of the structure of a lifting device provided in an embodiment of the utility model;

[0028] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0029] Description of reference numerals:

[0030] 100-mounting seat; 110-upper base; 120-lower base; 130-bearing seat; 140-lower lifting ear;

[0031] 200-support tube; 210-first stroke limit switch; 220-second stroke limit switch; 230-ring; 240-wear-resistant ring;

[0032] 300-driving member; 400-movable block; 410-annular boss; 500-piston rod; 510-upper lifting ear; 600-sliding guide member;

[0033] 700-driving component; 710-output end;

[0034] 800 - transmission assembly; 810 - first transmission tooth; 820 - second transmission tooth; 830 - third transmission tooth; 840 - transmission shaft. DETAILED DESCRIPTION

[0035] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of methods and devices consistent with some aspects of the utility model as detailed in the attached claims.

[0036] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] As mentioned in the background technology, linear transmission devices such as hydraulic lifting cylinders and ball screw lifters in related technologies all have certain usage limitations.

[0038] For example, in a low temperature environment, the hydraulic lifting cylinder has a larger flow resistance due to the increased viscosity of the hydraulic oil, and the power output of the hydraulic cylinder is blocked. When using a ball screw lifter, although the ball screw is not affected by the environment and has high precision, lubricant is required between the balls and the nut inside the ball screw to reduce friction and wear, which leads to the complexity of maintenance. In addition, due to the design characteristics of the ball screw, when it stops rotating, the balls will continue to remain in the raceway of the nut. In the absence of an external motor or brake, the load on the ball screw may move or slide on its own, so additional protective measures or structures need to be designed to ensure that the load does not slide accidentally, which further increases the structural and assembly costs.

[0039] Based on the above related description, an embodiment of the present application provides a lifting device to improve the problem that the lifting device in the related art is greatly limited in use due to environmental influences, which is described below in conjunction with the accompanying drawings.

[0040] Reference Figure 1 The lifting device in the embodiment of the present application includes a mounting seat 100, a driving member 300, a piston rod 500 and a sliding guide member 600.

[0041] Among them, a support tube 200 is fixed on the mounting seat 100; the driving member 300 is rotatably arranged in the support tube 200, and a movable block 400 is threadedly connected to the driving member 300, and the movable block 400 is configured to move along the height direction of the driving member 300 as the driving member 300 rotates; the piston rod 500 extends into the support tube 200 and is fixedly connected to the movable block 400, and the piston rod 500 moves synchronously with the movable block 400; the sliding guide component 600 is arranged between the outer wall of the movable block 400 and the inner wall of the support tube 200, and the sliding guide component 600 is fixedly connected to the movable block 400 and slidably abuts against the support tube 200.

[0042] It can be seen from the above description that the lifting device of the present application utilizes a rotating driving member 300 to drive the piston rod 500 to move in the height direction. Compared with the hydraulic lifting cylinder in the related art, the structure in which the driving member 300 and the piston rod 500 cooperate in lifting and lowering can avoid the intervention of the oil cylinder and there is no need to consider the use environment of the hydraulic oil medium, thereby being able to adapt to more severe working environments; in addition, due to the provision of a support tube 200, during the lifting process of the piston rod 500, the guide sliding component 600 is slidably connected to the support tube 200, and part of the piston rod 500 is located in the support tube 200, and an axial fit is formed with the support tube 200 through the guide sliding component 600, so that the support tube 200 plays a supporting and guiding role at the same time, effectively ensuring the lifting stability and support strength of the piston rod 500, and improving the use effect of the lifting device.

[0043] Continue to refer to Figure 1 The mounting base 100 in the embodiment of the present application includes an upper base 110 and a lower base 120 that are connected to each other, and the upper base 110 and the lower base 120 together form a mounting cavity.

[0044] Exemplarily, the lower base 120 and the upper base 110 are fastened and connected by a plurality of bolts arranged at intervals, and the mounting cavity formed inside the lower base 120 and the upper base 110 after docking is used to install the driving member 300 and the transmission assembly 800, etc. Further, the driving member 300 can be a driving screw, and the bottom end of the driving member 300 can be fixed to the lower base 120 by an axle pin, and a bearing seat 130 is provided in the mounting cavity, and the bearing seat 130 is connected to the shaft portion of the driving member 300 by a key fit, so that the driving member 300 is radially constrained in the bearing seat 130 and can rotate freely in the bearing seat 130, and the bearing seat 130 can be fixed to the upper base 110 and the lower base 120 by bolts.

[0045] like Figure 1 As shown, in some embodiments, an outer wall of the movable block 400 is provided with a mounting groove, and the sliding guide component 600 is disposed in the mounting groove, and the notch of the mounting groove is flush with the surface of the sliding guide component 600 .

[0046] In the above embodiment, the movable block 400 has an internal thread. After the movable block 400 and the driving member 300 are threadedly matched, when the driving member 300 rotates, the movable block 400 is restricted to perform lifting and displacement in the support tube 200. Exemplarily, the guide slide component 600 is an annular component sleeved on the movable block 400, and the outer surface of the guide slide component 600 forms a slidable abutment with the inner wall of the support tube 200. When the movable block 400 is lifted and displaced, the guide slide component 600 slides relative to the support tube 200 with the lifting and lowering action of the movable block 400, and the guide slide component 600 is used to support the displacement of the movable block 400, thereby ensuring the stable action of the movable block 400.

[0047] Furthermore, an annular boss 410 is provided at the upper and lower ends of the movable block 400, respectively. The two annular bosses 410 together form an annular mounting groove, and the guide slide component 600 is located between the two annular bosses 410 and is limited and fixed by the annular bosses 410. Here, the outer surface of the guide slide component 600 is flush with the outer surface of the annular boss 410, so that the guide slide component 600 and the annular boss 410 are both slidably abutted against the inner wall of the support tube 200.

[0048] Exemplarily, the movable block 400 and the guide sliding component 600 can be made of wear-resistant, high-strength metal materials or ceramic materials. Since the movable block 400 itself has a high displacement frequency and is subject to greater wear, the provision of the guide sliding component 600 can, on the one hand, enhance the sliding property and stability of the movable block 400 in the support tube 200. On the other hand, under long-term displacement and wear of the movable block 400, the normal operation of the movable block 400 can also be maintained by replacing the guide sliding component 600. This provision is also conducive to reducing maintenance costs.

[0049] It should be noted that the sliding friction between the guide component 600 and the inner wall of the support tube 200, and between the movable block 400 and the inner wall of the support tube 200 can be reduced through certain structural designs to further improve the smooth sliding effect. For example, industrial lubricant is applied to the inner wall of the support tube 200, or the surface smoothness of the guide component 600 is improved by polishing, coating or using low-friction materials, etc. The embodiments of the present application do not make absolute limitations on this.

[0050] Reference Figure 1 and Figure 2 In the embodiment of the present application, the lifting device also includes a driving component 700 and a transmission assembly 800.

[0051] The driving component 700 has a rotating output end 710, and the output end 710 extends into the installation cavity; the transmission assembly 800 is arranged in the installation cavity, and the transmission assembly 800 is respectively connected to the output end 710 and the driving member 300, and the transmission assembly 800 is configured to adjust the initial rotation speed of the output end 710 to the transmission rotation speed, and make the driving member 300 rotate according to the transmission rotation speed; wherein the initial rotation speed is greater than the transmission rotation speed.

[0052] In the above embodiment, the driving component 700 can be a driving motor, and the output end 710 of the driving motor is also the output shaft, which extends into the mounting cavity of the mounting seat 100. Here, the axis of the output end 710 of the driving component 700 is parallel to the axis of the driving member 300, and the driving motor is close to the side of the mounting seat 100. Compared with the related art in which the axis of the output end 710 of the driving motor is perpendicular to the axis of the driving member 300, the driving component 700 in the embodiment of the present application can save more space.

[0053] Exemplarily, the transmission assembly 800 includes a first transmission tooth 810, a second transmission tooth 820 and a third transmission tooth 830, the first transmission tooth 810 is meshedly connected to the output end 710, and the second transmission tooth 820 is coaxially stacked on the first transmission tooth 810; the third transmission tooth 830 is fixedly connected to the driving member 300 and meshedly connected to the second transmission tooth 820; the outer diameter of the third transmission tooth 830 is greater than the outer diameter of the second transmission tooth 820.

[0054] In the above embodiment, the output end 710 of the driving component 700 is coaxially driven with an output tooth, which is meshed and connected with the first transmission tooth 810, thereby driving the first transmission tooth 810 to rotate. The first transmission tooth 810 and the second transmission tooth 820 can be driven to rotate synchronously by a transmission shaft 840 that passes through the first and second transmission teeth 820. The driving member 300 is passed through the third transmission tooth 830, and a synchronous rotation effect is formed by key matching. When the output end 710 drives the output tooth to rotate, the first transmission tooth 810 drives the second transmission tooth 820 to rotate, and the second transmission tooth 820 drives the third transmission tooth 830 to rotate, and finally drives the driving member 300 to form a rotation effect.

[0055] It should be noted that, in the embodiment of the present application, the outer diameters of the first transmission tooth 810 and the third transmission tooth 830 are both larger than the outer diameters of the second transmission tooth 820 and the output tooth. The initial rotational speed output by the driving component 700 is decelerated by the transmission assembly 800, so that the final output transmission speed is lower than the initial rotational speed. As a result, the rotational speed transmitted to the driving member 300 is reduced and the torque is increased, thereby effectively ensuring the overall lifting force of the lifting device and enhancing the overall lifting strength of the lifting device.

[0056] In addition, since in the embodiment of the present application, the first transmission tooth 810 and the second transmission tooth 820 are coaxially stacked, the first transmission tooth 810 and the second transmission tooth 820 rotate synchronously, and the second transmission tooth 820 is meshed with the third transmission tooth 830 for transmission. While achieving the effect of speed reduction transmission, the structure between the various gears of the transmission assembly 800 is more compact, which is beneficial to reducing the occupied space in the mounting base 100, thereby helping to reduce the overall size of the lifting device.

[0057] like Figure 1 As shown, in the embodiment of the present application, the lifting device further includes at least one travel limit switch, which is disposed on the support tube 200 and is used to limit the limit position of the displacement of the movable block 400. Exemplarily, a first travel limit switch 210 is disposed at the upper end of the support tube 200, and the first travel limit switch 210 is used to limit the limit position of the upward displacement of the movable block 400, and a second travel limit switch 220 is disposed at the lower end of the support tube 200, and the second travel limit switch 220 is used to limit the limit position of the downward displacement of the movable block 400.

[0058] Here, the travel limit switch can prevent the movable block 400 from exceeding the movable position, thereby protecting the lifting device and ensuring the normal operation of the lifting device. The travel limit switch can adopt a limit switch component that can control the displacement distance of the movable block 400 in the relevant technology. For example, when the movable block 400 is displaced to the position where the first travel limit switch 210 is located, the movable block 400 triggers the first travel limit switch 210 to start, causing the circuit state of the driving component 700 to change, cutting off the continued operation of the driving component 700, and the movable block 400 stops moving upward. Of course, the working principle of the travel limit switch in the embodiment of the present application is only illustrated by way of example, as long as the displacement limit position of the movable block 400 can be limited.

[0059] Reference Figure 1 In the embodiment of the present application, a collar 230 is embedded in the inner wall of one end of the support tube 200 away from the mounting seat 100, and a wear-resistant ring 240 is fixed to the inner wall of the collar 230, and the wear-resistant ring 240 abuts against the piston rod 500. Here, the collar 230 can be made of metal material, and the wear-resistant ring 240 is made of a material with good wear resistance, such as ceramic material or high-performance engineering plastic, etc. The provision of the wear-resistant ring 240 can limit and support the piston rod 500, preventing the upper end of the piston rod 500 from moving and deviating in the support tube 200. At the same time, the abutment of the wear-resistant ring 240 and the piston rod 500 can close the gap of the support tube 200, preventing foreign objects from falling into the support tube 200 and affecting normal operation.

[0060] like Figure 1As shown, in some embodiments, an upper lifting ear 510 is fixed to one end of the piston rod 500 away from the mounting seat 100, and a lower lifting ear 140 is fixed to the mounting seat 100. The upper lifting ear 510 and the lower lifting ear 140 can facilitate lifting and positioning of heavy objects and prevent the heavy objects from slipping.

[0061] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0062] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A lifting device, characterized in that: include: A mounting seat, on which a support tube is fixedly provided; A driving member is rotatably disposed in the support tube, a movable block is threadedly connected to the driving member, and the movable block is configured to move along the height direction of the driving member as the driving member rotates; A piston rod is located in the support tube and is fixedly connected to the movable block, and the piston rod moves synchronously with the movable block; The slide guide component is arranged between the outer wall of the movable block and the inner wall of the support tube. The slide guide component is fixedly connected to the movable block and slidably abuts against the support tube.

2. The lifting device according to claim 1, characterized in that: An outer wall of the movable block is provided with a mounting groove, the slide guide component is arranged in the mounting groove, and the notch of the mounting groove is flush with the surface of the slide guide component.

3. The lifting device according to claim 2, characterized in that: The outer wall of the movable block is slidably abutted against the inner wall of the support tube.

4. The lifting device according to claim 1, characterized in that: The mounting seat is provided with a mounting cavity, and the lifting device further comprises: A driving component having a rotating output end, wherein the output end extends into the mounting cavity; A transmission assembly is disposed in the installation cavity, and the transmission assembly is connected to the output end and the driving member respectively. The transmission assembly is configured to adjust the initial rotation speed of the output end to the transmission rotation speed, and to make the driving member rotate according to the transmission rotation speed; wherein the initial rotation speed is greater than the transmission rotation speed.

5. The lifting device according to claim 4, characterized in that: The transmission assembly comprises: A first transmission tooth is meshed and connected with the output end, and a second transmission tooth is coaxially stacked on the first transmission tooth; The third transmission tooth is fixedly connected to the driving member and meshed with the second transmission tooth; the outer diameter of the third transmission tooth is greater than the outer diameter of the second transmission tooth.

6. The lifting device according to claim 4, characterized in that: The driving component is a driving motor, and the axis of the output end of the driving component is parallel to the axis of the driving member.

7. The lifting device according to claim 4, characterized in that: Also includes: At least one travel limit switch is arranged on the support tube, and the travel limit switch is used to limit the extreme position of the displacement of the movable block.

8. The lifting device according to claim 4, characterized in that: The mounting seat comprises an upper base and a lower base which are butt-jointed, and the upper base and the lower base together surround and form the mounting cavity.

9. A lifting device according to any one of claims 1 to 7, characterized in that: A collar is embedded in the inner wall of one end of the support tube away from the mounting seat, and a wear-resistant ring is fixed on the inner side wall of the collar, and the wear-resistant ring abuts against the piston rod.

10. The lifting device according to any one of claims 1 to 7, characterized in that: An upper lifting ear is fixed on one end of the piston rod away from the mounting seat, and a lower lifting ear is fixed on the mounting seat.

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