Multi-point supporting self-locking type lifting device

Abstract

The invention discloses a multi-point supporting self-locking type lifting device. According to the device, the multiple supporting assemblies are used for supporting the supporting plate, the supporting plate is used for bearing and supporting lifted objects, and uniform and stable stress is guaranteed through multi-point supporting; a left-handed screw rod sliding block is arranged on the left-handed screw rod, and a right-handed screw rod sliding block is arranged on the right-handed screw rod; according to the device, the distance between a left-handed screw rod sliding block and a right-handed screw rod sliding block in each supporting assembly is adjusted through rotation of a screw rod, and lifting and descending of a supporting plate are achieved; the self-locking function of the sliding blocks and the screw rods is achieved through friction force and a connecting structure of the left-handed lead screw sliding blocks and the left-handed screw rods and friction force and a connecting structure of the right-handed lead screw sliding blocks and the right-handed screw rods, the screw rods in the multiple sets of supporting units are matched, and when operation of the hand-cranking tool is stopped, due to the synergistic effect of the multiple sets of screw rods, the screw rods can be driven to rotate, so that the hand-cranking tool is convenient to operate. And all the screws can offset the moving trend of any single screw together, so that an integral self-locking mechanism is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of manual lifting devices, and more particularly, to a multi-point supported self-locking lifting device. Background Art

[0002] Currently, some products have special performance requirements, and elastic materials with relatively low hardness are often coated on the outer surface of the products. However, during the assembly or transportation of the products, there is a risk of damaging the soft structure of the elastic materials after being subjected to uneven external pressure. When transporting the products, a support platform is required to reduce the occupied space, and when performing assembly operations, it needs to be lifted to an appropriate height for operation. Therefore, a transportation and assembly integrated platform is needed to ensure the maintenance of the products. In the existing lifting and supporting devices, the contact surface mostly uses stick supports, and the contact area is relatively small, which is not suitable for supporting soft materials. On the other hand, most of the existing lifting devices use hydraulic single-point support for lifting, but hydraulic lifting has the risks of oil leakage and pressure relief, and often requires maintenance. In addition, the single hydraulic rod support for a large plane has the defects of uneven force and instability.

[0003] Aiming at the problems that most of the existing lifting devices use hydraulic single-point support for lifting, which not only has the defects of uneven force and instability when supporting a large plane, but also has risks such as oil leakage and pressure relief, no effective solution has been proposed yet. Summary of the Invention

[0004] An embodiment of the present invention provides a multi-point supported self-locking lifting device to solve the problems that most of the existing lifting devices use hydraulic single-point support for lifting, which not only has the defects of uneven force and instability when supporting a large plane, but also has risks such as oil leakage and pressure relief.

[0005] To achieve the above object, the present invention provides a multi-point supported self-locking lifting device, which includes: a mounting plate for fixing a plurality of support units; the support unit includes a plurality of support components; each support component includes: a support base including an upper support base and a lower support base, the lower support base is fixedly installed on the mounting plate; a screw assembly including a left-handed screw and a right-handed screw, the left-handed screw and the right-handed screw are connected by a first coupling; a left-handed screw slider is arranged on the left-handed screw, and a right-handed screw slider is arranged on the right-handed screw; the upper support base, the left-handed screw slider, the lower support base, and the right-handed screw slider are connected by a connecting rod; two adjacent support components are fixedly connected; a transmission chain for being installed on the screws at the same-side ends of a plurality of support units to drive the synchronous rotation of all screws; a hand-operated tool connected to one of the screws at one end where the transmission chain is installed; when the hand-operated tool is rotated clockwise, the distance between the left-handed screw slider and the right-handed screw slider in each group of support components is shortened by the rotation of the screw; when the hand-operated tool is rotated counterclockwise, the distance between the left-handed screw slider and the right-handed screw slider in each group of support components is increased by the rotation of the screw; when the rotation of the hand-operated tool stops, the distance between the left-handed screw slider and the right-handed screw slider does not change; a support plate installed on the upper support base for carrying and supporting the lifted item.

[0006] Optionally, the upper support base, the left-handed screw slider, the lower support base, the right-handed screw slider, and the upper support base are sequentially connected by a connecting rod to form a rhombus structure.

[0007] Optionally, the upper support base, the left-handed screw slider, the lower support base, the right-handed screw slider, and the connecting rod are connected by a pin shaft.

[0008] Optionally, two adjacent support components are connected by a second coupling.

[0009] Optionally, in each support component, the distance between the left-handed screw slider and the first coupling is equal to the distance between the right-handed screw slider and the first coupling.

[0010] Optionally, at least two support units are provided; at least two support components are provided in each support unit.

[0011] Optionally, the number of support components provided in each support unit is equal.

[0012] Optionally, the support base is made of a high-strength material.

[0013] Optionally, the left-handed screw is threadedly connected to the left-handed screw slider; the right-handed screw is threadedly connected to the right-handed screw slider.

[0014] Optionally, the support plate is an arc-shaped plate structure and the support plate is an integral structure.

[0015] Advantages of the present invention:

[0016] The present invention provides a multi-point supported self-locking lifting device. The device uses multiple support components to support a support plate, and the support plate is used to carry and support the lifted items. The multi-point support ensures uniform and stable force; the device adjusts the distance between the left-handed screw slider and the right-handed screw slider in each support component by rotating the screw, realizing the lifting and lowering of the support plate; through the friction force and connection structure between the left-handed screw slider and the left-handed screw, and the friction force and connection structure between the right-handed screw slider and the right-handed screw, the self-locking function of the slider and the screw is realized, and the screws in multiple groups of support units cooperate. When the operation of the hand tool stops, due to the cooperative action of multiple groups of screws, all screws will jointly cancel the moving tendency of any single screw, thereby forming an overall self-locking mechanism. Brief Description of the Drawings

[0017] Figure 1 is the front view of a multi-point supported self-locking lifting device provided by an embodiment of the present invention;

[0018] Figure 2 is the perspective view of a multi-point supported self-locking lifting device provided by an embodiment of the present invention.

[0019] Symbol Description:

[0020] Mounting plate - 1, support base - 2, left-handed screw - 3, right-handed screw - 4, first coupling - 5, left-handed screw slider - 6, right-handed screw slider - 7, drive chain - 8, hand tool - 9, support plate - 10, connecting rod - 11, pin shaft - 12, second coupling - 13, upper support base - 21, lower support base - 22. Detailed Embodiment

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0022] Figure 1 is the front view of a multi-point supported self-locking lifting device provided by an embodiment of the present invention; Figure 2 is the perspective view of a multi-point supported self-locking lifting device provided by an embodiment of the present invention. As Figure 1 and Figure 2 shown, the device includes:

[0023] 1. A mounting plate 1 for fixing multiple support units;

[0024] In an alternative embodiment, the mounting plate 1 may be provided as one, and a plurality of support units are fixed on one mounting plate 1;

[0025] In another alternative embodiment, a plurality of the mounting plates 1 are provided, and the plurality of mounting plates 1 correspond to the plurality of support units one by one; that is, one support unit is fixed on one mounting plate 1.

[0026] The mounting plate 1 is for being horizontally placed on the ground.

[0027] At least two of the support units are provided; in a specific embodiment of the present invention, two support units are provided, which are respectively used to support the front side and the rear side of an object.

[0028] 2. The support unit includes a plurality of support components; each support component includes: a support base 2, including an upper support base 21 and a lower support base 22, the lower support base 22 is fixedly installed on the mounting plate 1; a screw rod assembly, including a left-handed screw rod 3 and a right-handed screw rod 4, the left-handed screw rod 3 and the right-handed screw rod 4 are connected by a first coupling 5; a left-handed screw rod slider 6 is arranged on the left-handed screw rod 3, and a right-handed screw rod slider 7 is arranged on the right-handed screw rod 4; the upper support base 21, the left-handed screw rod slider 6, the lower support base 22, and the right-handed screw rod slider 7 are connected by a connecting rod 11; adjacent two support components are fixedly connected;

[0029] In an alternative embodiment, each support unit is composed of a plurality of support components, and adjacent two support components are connected by a second coupling 13; at least two support components are provided in each support unit; the number of support components provided in each support unit is equal. In a specific embodiment of the present invention, two support units are provided, two support components are provided in each support unit, and the two support components are connected by a second coupling 13.

[0030] Each support component includes: an upper support base 21, a lower support base 22, a left-handed screw rod 3, a right-handed screw rod 4, a left-handed screw rod slider 6, a right-handed screw rod slider 7, a first coupling 5, and a connecting rod 11;

[0031] Wherein, the lower support base 22 is fixedly installed on the mounting plate 1; the left-handed screw rod slider 6 is arranged on the left-handed screw rod 3, and the left-handed screw rod 3 is in threaded connection with the left-handed screw rod slider 6; the right-handed screw rod slider 7 is arranged on the right-handed screw rod 4, and the right-handed screw rod 4 is in threaded connection with the right-handed screw rod slider 7; the left-handed screw rod 3 and the right-handed screw rod 4 are connected by a first coupling 5.

[0032] The upper support base 21, the left-handed screw slider 6, the lower support base 22, the right-handed screw slider 7, and the upper support base 21 are sequentially connected by connecting rods 11 to form a rhombus structure. Specifically, one end of the upper support base 21 is connected to the center of the left-handed screw slider 6 by a connecting rod 11, the center of the left-handed screw slider 6 is connected to one end of the lower support base 22 by a connecting rod 11, the other end of the lower support base 22 is connected to the center of the right-handed screw slider 7 by a connecting rod 11, and the center of the right-handed screw slider 7 is connected to the other end of the upper support base 21 by a connecting rod 11.

[0033] Further, the upper support base 21, the left-handed screw slider 6, the lower support base 22, the right-handed screw slider 7 and the connecting rod 11 are fixedly connected by a pin shaft 12.

[0034] In each support assembly, the distance between the left-handed screw slider 6 and the first coupling 5 is equal to the distance between the right-handed screw slider 7 and the first coupling 5. This can ensure that the upper support base 21, the left-handed screw slider 6, the lower support base 22, and the right-handed screw slider 7 can form a rhombus structure.

[0035] 3. The drive chain 8 is used to be installed on the screws at the same-side ends of multiple support units to drive the synchronous rotation of all the screws;

[0036] In a specific embodiment of the present invention, the drive chain 8 is installed on the left-handed screw 3 at the right-side ends of two support units (as Figure 1 shown) to drive the synchronous rotation of all the screws.

[0037] 4. The hand tool 9 is connected to one of the screws on which one end of the drive chain 8 is installed; when the hand tool 9 is rotated clockwise, the distance between the left-handed screw slider 6 and the right-handed screw slider in each support assembly is shortened by the rotation of the screw; when the hand tool 9 is rotated counterclockwise, the distance between the left-handed screw slider 6 and the right-handed screw slider in each support assembly is increased by the rotation of the screw; when the rotation of the hand tool 9 stops, the distance between the left-handed screw slider 6 and the right-handed screw slider does not change;

[0038] Specifically, the rotation direction of the screw is closely related to the moving direction of the slider. When the hand tool 9 is rotated clockwise, this means that both the left-handed screw 3 and the right-handed screw 4 rotate in the clockwise direction. For the left-handed screw slider 6 and the right-handed screw slider 7, clockwise rotation will cause them to approach the first coupling 5 respectively. Specifically: when the left-handed screw 3 rotates clockwise, the left-handed screw slider 6 will move on the left-handed screw 3 towards the first coupling 5; similarly, when the right-handed screw 4 rotates clockwise, the right-handed screw slider 7 will move on the right-handed screw 4 towards the first coupling 5.

[0039] Since both the left-handed screw slider 6 and the right-handed screw slider 7 move towards the first coupling 5, the distance between the left-handed screw slider 6 and the right-handed screw slider 7 shortens. At this time, the vertical distance between the lower support base 22 and the screw rod increases, and the vertical distance between the upper support base 21 and the screw rod also increases correspondingly. Furthermore, the distance between the upper support base 21 and the lower support base 22 increases, and the device is lifted.

[0040] Conversely, when the hand-operated tool 9 is rotated counterclockwise, the distance between the left-handed screw slider 6 and the right-handed screw slider increases, the distance between the upper support base 21 and the lower support base 22 becomes shorter, and the device will descend.

[0041] When the rotation of the hand-operated tool 9 stops, the distance between the left-handed screw slider 6 and the right-handed screw slider does not change, realizing the self-locking mechanism.

[0042] The self-locking mechanism is achieved in the following ways:

[0043] (1) Thread connection design: Use a larger pitch or a steeper thread angle. When the external force is removed, due to the existence of friction, the left-handed screw slider 6 and the right-handed screw slider 7 will not move freely on the screw rod. Even if there is a load acting on the left-handed screw slider 6 and the right-handed screw slider 7, it will not cause automatic rotation or sliding. This design can ensure that after the operation of the hand-operated tool 9 stops, the lifting device will not fall back by itself, thus realizing self-locking.

[0044] (2) Multiple groups of left-handed screw sliders 6 and right-handed screw sliders 7 are all precisely matched with their respective screw rods. When each group of screw rods rotates synchronously, each group of screw rods will receive a uniform force. Due to the synergistic effect of multiple groups of screw rods, after the operation stops, the sliding of any group of screw rods will be restricted by the friction of other groups of screw rods, further preventing the device from sliding and realizing the self-locking function.

[0045] (3) The drive chain 8 connects the screw rods at the same-side ends of the front and rear two support units to make them rotate synchronously. When the operation of the hand-operated tool 9 stops, due to the rigid characteristics of the drive chain 8, all the screw rods will jointly counteract the movement tendency of any single screw rod, thus forming an overall self-locking mechanism.

[0046] (4) The friction between the left-handed screw slider 6 and the right-handed screw slider 7 and the screw rod is also a key factor in self-locking. By precisely designing the friction coefficient between the slider and the screw rod, when the manual operation stops, the friction force is sufficient to resist the sliding caused by the object's own weight or external force.

[0047] 5. The support plate 10 is installed on the upper support base 21 and is used to carry and support the lifted items.

[0048] In an alternative embodiment, the support base 2 is made of a high-strength material to ensure the stable operation of the entire device under high-load conditions.

[0049] The support plate 10 is an arc-shaped plate structure and is an integral structure.

[0050] The device of the present invention is applicable to an integrated platform for transportation and assembly, and can perform smooth height adjustment without damaging the supported object; after the device performs lifting and lowering operations, it can achieve a self-locking mechanism to prevent sliding or accidental lowering, improving the safety of operation and the stability of the device.

[0051] Advantages of the present invention:

[0052] The present invention provides a multi-point supported self-locking lifting device. The device uses multiple support components to support the support plate 10, and the support plate 10 is used to carry and support the lifted object. The multi-point support ensures uniform and stable force; the device adjusts the distance between the left-handed screw slider 6 and the right-handed screw slider in each support component by rotating the screw, realizing the lifting and lowering of the support plate 10; through the friction and connection structure between the left-handed screw slider 6 and the left-handed screw 3, and the friction and connection structure between the right-handed screw slider 7 and the right-handed screw 4, the self-locking function of the slider and the screw is realized, and the screws in multiple groups of support units cooperate. When the operation of the hand tool 9 stops, due to the synergistic effect of multiple groups of screws, all screws will jointly offset the movement tendency of any single screw, thereby forming an overall self-locking mechanism.

[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A multi-point supported self-locking lifting device, characterized in that Comprising: A mounting plate for fixing a plurality of support units; The support unit includes a plurality of support components; Each support component includes: a support base including an upper support base and a lower support base, the lower support base being fixedly mounted on the mounting plate; a screw assembly including a left-handed screw and a right-handed screw, the left-handed screw and the right-handed screw being connected by a first coupling; a left-handed screw slider is provided on the left-handed screw, and a right-handed screw slider is provided on the right-handed screw; the upper support base, the left-handed screw slider, the lower support base, and the right-handed screw slider are connected by a connecting rod; adjacent two support components are fixedly connected; A transmission chain for being mounted on the screws at the same-side ends of a plurality of support units to drive the synchronous rotation of all the screws; A hand-operated tool connected to one of the screws at one end of the mounted transmission chain; when the hand-operated tool is rotated clockwise, the distance between the left-handed screw slider and the right-handed screw slider in each group of support components is shortened by the rotation of the screw; when the hand-operated tool is rotated counterclockwise, the distance between the left-handed screw slider and the right-handed screw slider in each group of support components is increased by the rotation of the screw; when the rotation of the hand-operated tool stops, the distance between the left-handed screw slider and the right-handed screw slider does not change; A support plate mounted on the upper support base for carrying and supporting the lifted article.

2. The device according to claim 1, wherein: The upper support base, the left-handed screw slider, the lower support base, the right-handed screw slider, and the upper support base are sequentially connected by a connecting rod to form a rhombus structure.

3. The device according to claim 2, wherein: The upper support base, the left-handed screw slider, the lower support base, the right-handed screw slider, and the connecting rod are connected by a pin shaft.

4. The device according to claim 1, wherein: Adjacent two support components are connected by a second coupling.

5. The device according to claim 1, wherein: In each support component, the distance between the left-handed screw slider and the first coupling is equal to the distance between the right-handed screw slider and the first coupling.

6. The device according to claim 1, wherein: At least two support units are provided; at least two support components are provided in each support unit.

7. The device according to claim 6, wherein: The number of support components provided in each support unit is equal.

8. The device according to claim 1, wherein: The support base is made of a high-strength material.

9. The device according to claim 1, wherein: The left-handed screw is threadedly connected to the left-handed screw slider; the right-handed screw is threadedly connected to the right-handed screw slider.

10. The device according to claim 1, wherein: The support plate is an arc-shaped plate structure, and the support plate is an integral structure.

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