Tension-adjustable lifting transmission and lifting device

Abstract

The utility model relates to hoisting equipment manufacturing technical field discloses a tension adjustable hoisting transmission and hoisting equipment. Wherein tension adjustable hoisting transmission includes fixed unit, driving roller, driven roller, hoisting belt, drive unit and adjusting unit. Fixed unit includes inclined support and a pair of opposite fixed side station, and fixed side station is installed in inclined support, and driving roller is connected with driven roller and is divided and sets between two fixed side stations, and driven roller is located in the upper of driving roller along the extension direction of fixed side station, and hoisting belt is sleeved on two rollers. Drive unit is installed in fixed side station and is connected with driving roller, and adjusting unit includes first sliding box and first adjusting part, and first sliding box is installed in at least one fixed side station, and first adjusting part is installed in it and its output end is connected with driven roller, and the tension of hoisting belt is adjusted through adjusting unit, and the difficulty of relaxing hoisting belt is reduced when disassembling, and maintenance replacement is more efficient and labor saving, and the practicality and operation convenience of hoisting device.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment manufacturing technology, and in particular to a lifting transmission device and lifting equipment with adjustable tension. Background Technology

[0002] In the field of lifting equipment manufacturing technology, lifting transmission devices, as core components for the vertical or inclined conveying of materials or workpieces, have a crucial impact on the continuity and stability of the entire production process. In many scenarios such as industrial production, logistics transportation, and warehousing management, the efficient operation of lifting equipment is directly related to production efficiency and operating cost control.

[0003] Currently, some lifting transmission devices use a fixed installation method for the driving and driven rollers, which are rigidly connected to the support structures on both sides. This means that the tension of the lifting belt between the two rollers is fixed after installation and cannot be flexibly adjusted according to actual usage. The lifting belt is difficult to disassemble, which not only reduces maintenance efficiency and prolongs downtime during device maintenance, but may also cause permanent damage to components during disassembly, increasing maintenance costs and risks.

[0004] Therefore, there is an urgent need for a lifting transmission device with adjustable tension, which can solve the problem of difficult disassembly and maintenance caused by the non-adjustable tension of the lifting belt. Utility Model Content

[0005] The purpose of this invention is to provide a lifting transmission device with adjustable tension, which can solve the problems of poor transmission effect and difficulty in disassembly and maintenance caused by non-adjustable tension of the lifting belt.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] An adjustable lifting transmission device includes:

[0008] A fixing unit, comprising an inclined support and a pair of oppositely arranged fixing side platforms, the fixing side platforms being mounted on the inclined support;

[0009] An active roller is disposed between the two fixed side platforms and connected to the fixed side platforms;

[0010] The driven roller is disposed between and connected to the two fixed side platforms, and is positioned above the driving roller in the direction of extension of the fixed side platform;

[0011] A lifting belt, which is sleeved around the outer periphery of the driving roller and the driven roller;

[0012] The drive unit is mounted on the fixed side platform and connected to the drive roller;

[0013] An adjustment unit includes a first slide box and a first adjustment member. The first slide box is mounted on at least one of the fixed side platforms, and the first adjustment member is mounted inside the first slide box. The output end of the first adjustment member is connected to the driven roller, and the first adjustment member is used to drive the driven roller to slide along the extension direction of the fixed side platform.

[0014] As an alternative to the adjustable lifting transmission device, the first adjusting element is an electro-hydraulic rod.

[0015] As an alternative to the adjustable lifting transmission device, the first slide box is provided with a first slide groove, which extends along the extending direction of the fixed side platform. The adjustment unit also includes:

[0016] A first slider is connected to the output end of the first adjusting member. The first slider is disposed in the first slide groove and can slide along the extension direction of the first slide groove.

[0017] The first bearing has its inner ring connected to one end of the driven roller and its outer ring connected to the first slider.

[0018] As an alternative to this adjustable lifting transmission device, the adjustment unit further includes:

[0019] The second slide box is provided with a second slide groove, which extends along the extension direction of the fixed side platform;

[0020] The second slider is disposed in the second groove and is capable of sliding along the extension direction of the second groove;

[0021] The second bearing has its inner ring connected to the opposite end of the driven roller, and its outer ring connected to the second slider.

[0022] As an optional solution for the adjustable lifting transmission device, the second slide box is also provided with a roller unloading groove. The roller unloading groove is located on the lower side of the second slide along the extension direction of the fixed side platform. The roller unloading groove is connected to the second slide. The opening size of the second slide is smaller than the size of the second slider, and the size of the roller unloading groove is greater than or equal to the size of the second slider. The driven roller can be disengaged from the roller unloading groove.

[0023] As an alternative to this adjustable lifting transmission device, the lifting belt is made of rubber.

[0024] As an alternative to the adjustable lifting transmission device, the inclined support includes a downwardly extending bearing plate and two support legs of the same height connected by a connecting beam. The first end of the bearing plate is connected to the two support legs, and the fixed side platform is mounted on the bearing plate.

[0025] As an alternative to the adjustable lifting transmission device, the fixing unit also includes a bolt and nut structure, through which the bearing plate is connected to the fixing side platform.

[0026] As an alternative to the adjustable lifting transmission device, the fixing unit also includes a support base, which is installed at the bottom of the inclined support.

[0027] The lifting equipment includes a main body and an adjustable lifting transmission device mounted on the main body.

[0028] The beneficial effects of this utility model are as follows:

[0029] This utility model proposes an adjustable lifting transmission device. The fixed unit includes an inclined support and a pair of fixed side platforms arranged opposite each other. The fixed side platforms are mounted on the inclined support. The driving roller is disposed between and connected to the two fixed side platforms, and the driven roller is disposed between and connected to the two fixed side platforms. The driven roller is positioned above the driving roller along the extension direction of the fixed side platforms. The lifting belt is sleeved on the driving roller and the driven roller. The driving unit is mounted on the fixed side platforms and connected to the driving roller. The adjusting unit includes a first sliding box and a first adjusting member. The first sliding box is mounted on at least one fixed side platform, and the first adjusting member is mounted inside the first sliding box. The output end of the first adjusting member is connected to the driven roller. The first adjusting member is used to drive the driven roller to slide along the extension direction of the fixed side platforms. The tension of the lifting belt can be easily changed by driving the driven roller to slide through the adjusting unit. This ensures the stability of the transmission process and the service life of the lifting belt. When disassembly is required later, the lifting belt can be loosened to reduce the difficulty of disassembly, making maintenance, replacement and other operations more efficient and labor-saving, greatly improving the practicality and ease of operation of the device. Attached Figure Description

[0030] Figure 1 This is a first structural schematic diagram of the adjustable lifting transmission device provided in this embodiment of the utility model;

[0031] Figure 2 This is a second structural schematic diagram of the adjustable lifting transmission device provided in this embodiment of the utility model;

[0032] Figure 3 This is a third structural schematic diagram of the adjustable lifting transmission device provided in this embodiment of the utility model;

[0033] Figure 4 This is a fourth structural schematic diagram of the adjustable lifting transmission device provided in this embodiment of the utility model;

[0034] Figure 5 This is a fifth structural schematic diagram of the adjustable lifting transmission device provided in this embodiment of the utility model.

[0035] In the picture:

[0036] 1. Fixed unit; 11. Inclined support; 111. Support leg; 112. Bearing plate; 12. Fixed side platform; 13. Bolt and nut structure; 14. Support base;

[0037] 2. Drive roller;

[0038] 3. Driven roller;

[0039] 4. Lifting belt;

[0040] 5. Drive unit; 51. Drive motor; 52. Motor housing;

[0041] 6. Adjustment unit; 61. First slide box; 611. First slide groove; 612. Upper roller opening; 62. First adjusting component; 63. First slider; 64. First bearing; 65. Second slide box; 651. Second slide groove; 652. Unloading roller groove; 66. Second slider; 67. Second bearing. Detailed Implementation

[0042] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] This embodiment discloses a lifting transmission device with adjustable tension, such as... Figures 1-2As shown, in this embodiment, the adjustable lifting transmission device includes a fixed unit 1, a driving roller 2, a driven roller 3, a lifting belt 4, a drive unit 5, and an adjustment unit 6. The fixed unit 1 includes an inclined support 11 and a pair of oppositely arranged fixed side platforms 12. The fixed side platforms 12 are mounted on the inclined support 11. The driving roller 2 is disposed between and connected to the two fixed side platforms 12. The driven roller 3 is disposed between and connected to the two fixed side platforms 12, and is positioned above the driving roller 2 along the extending direction of the fixed side platforms 12. The lifting belt 4 is sleeved around the outer periphery of the driving roller 2 and the driven roller 3. The drive unit 5 is mounted on the fixed side platforms 12 and connected to the driving roller 2. The adjustment unit 6 includes a first sliding box 61 and a first adjusting member 62. The first sliding box 61 is mounted on at least one fixed side platform 12. The first adjusting member 62 is installed inside the first sliding box 61. The output end of the first adjusting member 62 is connected to the driven roller 3. The first adjusting member 62 is used to drive the driven roller 3 along the fixed side platform 12. The platform 12 slides in the extension direction, and the first adjusting component 62 of the adjusting unit 6 drives the driven roller 3 to slide along the extension direction of the fixed side platform 12, so that the lifting belt 4 is loosened, thereby reducing the tightness of the fit between the lifting belt 4 and the driving roller 2 and the driven roller 3, making it easier to remove the lifting belt 4 from the two rollers. At the same time, it also reduces the obstruction for the disassembly of components such as the driving roller 2 and the driven roller 3. By driving the driven roller 3 to slide through the adjusting unit 6, the tightness of the lifting belt 4 can be easily changed, which not only ensures the stability of the transmission process and the service life of the lifting belt 4, but also reduces the difficulty of disassembly by loosening the lifting belt 4 when disassembly is required in the future, avoiding problems such as disassembly difficulties and component damage caused by the tightness of the lifting belt 4. This makes the disassembly process smoother and more efficient, and makes maintenance, replacement and other operations more efficient and labor-saving, greatly improving the practicality and ease of operation of the device.

[0048] Preferably, in this embodiment, the first adjusting member 62 is an electro-hydraulic rod, which can stably and accurately drive the driven roller 3 to slide along the extension direction of the fixed side platform 12. The electro-hydraulic rod has a large output force and runs smoothly, which can ensure the reliability and accuracy of the tension adjustment process of the lifting belt 4. It can maintain the appropriate tightness of the lifting belt 4 during transmission to ensure transmission stability and the service life of the lifting belt 4, and can smoothly adjust the lifting belt 4 to a slack state when disassembly is required, reducing the difficulty of disassembly, avoiding damage to components, and further improving the efficiency and convenience of device maintenance and replacement operations, thus enhancing the overall practicality. In other embodiments, the first adjusting member 62 can also be a servo motor combined with a ball screw structure or a pneumatic push rod, etc.

[0049] Specifically, such as Figures 1-2As shown, in this embodiment, the first slide box 61 is provided with a first slide groove 611, which extends along the extension direction of the fixed side platform 12. The adjustment unit 6 also includes a first slider 63 and a first bearing 64. The first slider 63 is connected to the output end of the first adjustment member 62 and is disposed in the first slide groove 611. The first slider 63 can slide along the extension direction of the first slide groove 611. The inner ring of the first bearing 64 is connected to one end of the driven roller 3, and the outer ring of the first bearing 64 is connected to the first slider 63. The first slider 63 slides along the first slide groove 611 to ensure that the driven roller 3 moves smoothly and strictly along the extension direction of the fixed side platform 12. The lifting belt 4 is loosened to prevent misalignment from affecting its adjustment accuracy. The first bearing 64 connects the driven roller 3 and the first slider 63, allowing the driven roller 3 to rotate freely while moving with the slider, ensuring normal transmission between it and the lifting belt 4. The cooperation between the first slide groove 611 and the first slider 63 improves the stability and accuracy of the adjustment process, ensuring uniform and reliable tension adjustment of the lifting belt 4. This also improves the disassembly efficiency of the adjustable lifting transmission device. Furthermore, the first bearing 64 enables compatibility between the movement and rotation of the driven roller 3, avoiding mechanical interference and additional wear, extending the service life of components, and further optimizing the reliability and smoothness of the device's adjustment.

[0050] Preferably, such as Figures 1-2 As shown, in this embodiment, the size of the opening of the first slide groove 611 is smaller than the size of the first slider 63. An upper roller opening 612 is provided at the top of the first slide box 61 along the extension direction of the fixed side platform 12. The upper roller opening 612 communicates with the first slide groove 611. The driven roller 3 slides into the first slide groove 611 through the upper roller opening 612. The size of the opening of the first slide groove 611 is smaller than the size of the first slider 63, which can limit the first slider 63, preventing it from coming out of the groove and ensuring the stability of the first slider 63 when sliding along the slide groove. The opening of the first slide groove 611 is smaller than the size of the first slider 63, thus limiting the first slider 63 and preventing it from coming out of the groove, ensuring the stability of the first slider 63 when sliding along the slide groove. The upper roller opening 612, which is located at the top of the direction and communicates with the first slide groove 611, facilitates the driven roller 3 to slide into the slide groove through the opening and cooperate with the first slider 63 for installation. This structural design not only ensures the stability of the slider during the adjustment process through the size difference between the groove and the slider, avoiding the impact on the adjustment accuracy and device operation due to the slider falling off, but also reduces the installation difficulty of the driven roller 3 by using the upper roller opening 612, realizing the convenient assembly of the driven roller 3 and the adjustment unit 6, further improving the reliability and convenience of device assembly and adjustment, and optimizing the practicality of the overall structure.

[0051] Specifically, such as Figures 1-3As shown, in this embodiment, the adjustment unit 6 further includes a second sliding box 65, a second slider 66, and a second bearing 67. The second sliding box 65 is provided with a second sliding groove 651, which extends along the extension direction of the fixed side platform 12. The second slider 66 is disposed in the second sliding groove 651 and can slide along the extension direction of the second sliding groove 651. The inner ring of the second bearing 67 is connected to the opposite end of the driven roller 3, and the outer ring of the second bearing 67 is connected to the second slider 66. This allows both ends of the driven roller 3 to move smoothly and synchronously along the extension direction of the fixed side platform 12, further ensuring the parallelism and stability of the driven roller 3 during movement. This avoids problems such as uneven tension adjustment, deviation, or component imbalance caused by single-end force or movement deviation. At the same time, the second bearing 67 enables the rotation compatibility of the other end of the driven roller 3, reducing mechanical wear, improving the overall adjustment accuracy and the smoothness of device operation, making the tension adjustment of the lifting belt 4 more reliable, the disassembly operation more convenient, and further extending the service life of the device.

[0052] Preferably, such as Figures 1-3 As shown, in this embodiment, the second slide box 65 is also provided with a roller unloading groove 652. The roller unloading groove 652 is located on the lower side of the second slide groove 651 along the extension direction of the fixed side platform 12. The roller unloading groove 652 is connected to the second slide groove 651. The size of the roller unloading groove 652 is greater than or equal to the size of the second slider 66. The driven roller 3 can be disengaged from the roller unloading groove 652. After the lifting belt 4 is relaxed, the installation constraint of the driven roller 3 can be further eliminated, making the disassembly of the driven roller 3 more direct and convenient. It avoids disassembly obstacles caused by the limitation of the sliding stroke. At the same time, in conjunction with the structure of the first slide box 61, it ensures that both ends of the driven roller 3 can be disengaged smoothly, reducing the impact damage to the components during disassembly, further improving the operational efficiency during device maintenance and replacement, and enhancing the practicality and convenience of the overall structure.

[0053] In other embodiments, both ends of the driven roller 3 may be configured as a first slide box 61, a first adjusting member 62, a first slider 63, and a first bearing 64.

[0054] Preferably, in this embodiment, the lifting belt 4 is made of rubber. Rubber has good elasticity and flexibility, which can better adapt to the positional changes of the driving roller 2 and driven roller 3 during the adjustment process. This ensures that the lifting belt 4 maintains a stable fit with the roller body even when the tension changes, reducing slippage during transmission and ensuring the reliability of the lifting transmission. The rubber material has strong wear resistance and anti-aging properties, which can extend the service life of the lifting belt 4 and reduce the replacement frequency. Its relatively low hardness can reduce rigid friction with the driving roller 2 and driven roller 3, reducing component wear. Combined with the adjustment unit 6 to adjust the tension, it further avoids material fatigue or breakage caused by excessive tension, making the device more stable and durable, reducing maintenance costs, and significantly improving the practicality and economy of the overall device. In other embodiments, the lifting belt 4 can also be made of nylon or polyurethane materials, etc.

[0055] Preferably, such as Figures 1-5 As shown, in this embodiment, the inclined support 11 includes a downwardly extending bearing plate 112 and two support legs 111 of the same height connected by a connecting beam. The first end of the bearing plate 112 is connected to the two support legs 111. The fixed side platform 12 is installed on the bearing plate 112, which can provide a stable support foundation for the entire device. At the same time, with the inclined setting of the bearing plate 112, the active roller 2 and the driven roller 3 form an inclined layout that meets the lifting requirements, ensuring that the transmission direction and lifting angle of the lifting belt 4 are adapted to the actual operation requirements. The support legs 111 can ensure the stability of the device during operation and avoid shaking that affects the transmission accuracy and lifting effect. The inclined bearing plate 112 can reasonably plan the spatial position of the active roller 2, the driven roller 3 and the lifting belt 4, making the lifting transmission process more in line with the mechanical principles, improving the work efficiency, and also providing a reasonable support carrier for the installation and layout of each component, further enhancing the overall structural rationality and practicality of the device.

[0056] Preferably, such as Figures 1-5 As shown, in this embodiment, the fixing unit 1 further includes a bolt and nut structure 13. The bearing plate 112 and the fixed side platform 12 are connected by the bolt and nut structure 13, achieving detachable fixing between them. The bolt and nut connection has the characteristics of stable connection and high reliability, which can ensure the stability of the fixed side platform 12 during device operation. At the same time, the detachable feature makes it more convenient to maintain, replace or adjust the layout of the fixed side platform 12, bearing plate 112 or related components in the later stage, reducing the difficulty of operation and improving the flexibility and maintainability of the device. In other embodiments, the bearing plate 112 and the fixed side platform 12 can also be connected by welding or snap-fit ​​connection, etc.

[0057] Preferably, such as Figures 1-5As shown, in this embodiment, the fixing unit 1 also includes a support base 14, which is installed at the bottom of the support and can form a firm fixed connection between the device and the ground. The device can be stably placed by anchoring or closely fitting the support base 14 to the ground.

[0058] Optionally, in this embodiment, the support base 14 is an adjustable foot. The adjustable foot effectively enhances the overall anti-overturning capability of the device, resists lateral forces generated during the lifting transmission process, and prevents the device from shifting or swaying. Simultaneously, the adjustable foot can adapt to uneven ground by adjusting its height, ensuring the overall levelness of the device and the coordinated operation of the transmission components. Furthermore, the stable connection between the adjustable foot and the ground further distributes the weight and operating load of the device, reducing pressure on the ground, protecting the installation foundation, and improving the long-term reliability and safety of the device. In other embodiments, the support base 14 can also be a roller-type support or a frame-type support, etc.

[0059] Specifically, such as Figures 1-5 As shown, in this embodiment, the drive unit 5 includes a drive motor 51, which is mounted on the fixed side platform 12. The output end of the drive motor 51 is connected to the active roller 2, which can provide stable power output to the active roller 2, drive the active roller 2 to rotate, and then drive the driven roller 3 to rotate synchronously through the lifting belt 4, so as to realize the lifting transmission function of the device. The drive motor 51 has stable power output and strong controllability, and can accurately adjust the speed and direction of the active roller 2 to meet different lifting requirements. At the same time, the motor is directly mounted on the fixed side platform 12, which shortens the power transmission path, reduces energy loss, improves transmission efficiency, and the installation method is compact, saves space, facilitates the overall layout, and also provides convenience for the later maintenance and repair of the motor, ensuring the continuous and stable operation of the device.

[0060] Preferably, such as Figures 1-5 As shown, in this embodiment, the drive unit 5 also includes a motor cover 52, which covers the drive motor 51. The motor cover 52 is connected to the fixed side platform 12, providing physical protection for the drive motor 51, blocking external dust, debris, water droplets, etc. from corroding the motor, extending the service life of the drive motor 51, reducing failures caused by external environmental factors, ensuring the stability and safety of motor operation, and the connection with the fixed side platform 12 makes the cover firmly installed and will not loosen due to vibration during device operation. At the same time, when it is necessary to maintain the motor, the cover can be easily disassembled, and it can also prevent personnel from directly contacting the running motor and causing safety accidents, thus taking into account both protection and maintainability.

[0061] This embodiment also discloses a lifting device. In this embodiment, the lifting device includes a device body and an adjustable lifting transmission device. The adjustable lifting transmission device is installed on the device body. By installing the adjustable lifting transmission device on the device body, the lifting device can conveniently change the tension of the lifting belt 4 by driving the driven roller 3 to slide with the help of the adjustment unit 6. This ensures the stability of the transmission process and the service life of the lifting belt 4. It also reduces the difficulty of disassembly by loosening the lifting belt 4 during subsequent maintenance and replacement operations, avoiding disassembly difficulties and component damage caused by the tightness of the lifting belt 4. This makes the disassembly process smoother and more efficient, and maintenance and replacement less laborious, greatly improving the practicality, ease of operation, and overall reliability and economy of the equipment.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A lifting transmission device with adjustable tension, characterized in that, include: The fixing unit (1) includes an inclined support (11) and a pair of fixed side platforms (12) arranged opposite to each other, the fixed side platforms (12) being mounted on the inclined support (11); An active roller (2) is disposed between the two fixed side platforms (12) and connected to the fixed side platforms (12); Driven roller (3), the driven roller (3) is disposed between the two fixed side platforms (12) and connected to the fixed side platforms (12), the driven roller (3) is disposed above the driving roller (2) along the extension direction of the fixed side platforms (12); A lifting belt (4) is sleeved on the outer periphery of the driving roller (2) and the driven roller (3); A drive unit (5) is mounted on the fixed side platform (12) and connected to the drive roller (2); The adjustment unit (6) includes a first slide box (61) and a first adjustment member (62). The first slide box (61) is mounted on at least one of the fixed side platforms (12). The first adjustment member (62) is mounted inside the first slide box (61). The output end of the first adjustment member (62) is connected to the driven roller (3). The first adjustment member (62) is used to drive the driven roller (3) to slide along the extension direction of the fixed side platform (12).

2. The adjustable lifting transmission device according to claim 1, characterized in that, The first adjusting component (62) is an electro-hydraulic rod.

3. The adjustable lifting transmission device according to claim 1, characterized in that, The first sliding box (61) is provided with a first sliding groove (611), which extends along the extending direction of the fixed side platform (12). The adjustment unit (6) further includes: The first slider (63) is connected to the output end of the first adjusting member (62). The first slider (63) is disposed in the first slide groove (611). The first slider (63) can slide along the extension direction of the first slide groove (611). The first bearing (64) has its inner ring connected to one end of the driven roller (3) and its outer ring connected to the first slider (63).

4. The adjustable lifting transmission device according to claim 3, characterized in that, The adjustment unit (6) further includes: The second slide box (65) is provided with a second slide groove (651), which extends along the extension direction of the fixed side platform (12). The second slider (66) is disposed in the second groove (651) and is capable of sliding along the extension direction of the second groove (651); The second bearing (67) has its inner ring connected to the opposite end of the driven roller (3) and its outer ring connected to the second slider (66).

5. The adjustable lifting transmission device according to claim 4, characterized in that, The second slide box (65) is also provided with a roller unloading groove (652). The roller unloading groove (652) is located on the lower side of the second slide groove (651) along the extension direction of the fixed side platform (12). The roller unloading groove (652) is connected to the second slide groove (651). The groove opening size of the second slide groove (651) is smaller than the size of the second slider (66). The size of the roller unloading groove (652) is greater than or equal to the size of the second slider (66). The driven roller (3) can be disengaged from the roller unloading groove (652).

6. The adjustable lifting transmission device according to any one of claims 1-5, characterized in that, The lifting belt (4) is made of rubber material.

7. The adjustable lifting transmission device according to any one of claims 1-5, characterized in that, The inclined support (11) includes a downwardly extending bearing plate (112) and two support legs (111) of the same height connected by a connecting beam. The first end of the bearing plate (112) is connected to the two support legs (111), and the fixed side platform (12) is mounted on the bearing plate (112).

8. The adjustable lifting transmission device according to claim 7, characterized in that, The fixing unit (1) also includes a bolt and nut structure (13), and the bearing plate (112) is connected to the fixing side platform (12) through the bolt and nut structure (13).

9. The adjustable lifting transmission device according to any one of claims 1-5, characterized in that, The fixing unit (1) also includes a support base (14), which is installed at the bottom of the inclined support (11).

10. A lifting device, characterized in that, It includes a device body and a tension-adjustable lifting transmission device as described in any one of claims 1-9, wherein the tension-adjustable lifting transmission device is mounted on the device body.

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