A type of lifting platform

Abstract

This utility model relates to a lifting platform, comprising: a base, a worktable, a scissor arm assembly, a transmission mechanism, and a handwheel. The scissor arm assembly is mounted on the base, and the worktable is mounted on the scissor arm assembly. The transmission mechanism includes a lead screw and a nut. The lead screw is rotatably mounted on the worktable or the base, and the nut is mounted on the scissor arm assembly. The handwheel is connected to the lead screw. When the handwheel rotates, it can drive the worktable to rise or fall via the transmission mechanism and the scissor arm assembly. A resistance mechanism is provided on the base, the worktable, or the handwheel. The resistance mechanism includes an adjustment knob, which can adjust the rotational resistance of the handwheel. This application, by setting a resistance mechanism and an adjustment knob, allows the rotational resistance of the handwheel to be adjusted as needed, facilitating low-speed fine-tuning or high-speed lifting by the user.

Description

Technical Field

[0001] This utility model relates to the field of lifting device technology, specifically a lifting platform. Background Technology

[0002] Lifting platforms are important tools in industrial machinery, capable of raising and lowering objects from one height to another to meet various usage needs. Manual precision lifting platforms, characterized by high lifting accuracy, are key equipment in laboratories, industrial testing, and precision machining. However, current manual precision lifting platforms have a constant rotational resistance in their handwheels, making fine adjustments dependent on the user's skill. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lifting platform to address the above-mentioned shortcomings.

[0004] To solve the above technical problems, the present invention adopts the following technical solution:

[0005] A lifting platform includes: a base, a worktable, a scissor arm assembly, a transmission mechanism, and a handwheel. The scissor arm assembly is mounted on the base, and the worktable is mounted on the scissor arm assembly. The transmission mechanism includes a lead screw and a nut. The lead screw is rotatably mounted on the worktable or the base, and the nut is mounted on the scissor arm assembly. The handwheel is connected to the lead screw. When the handwheel rotates, it can drive the worktable to rise or fall through the transmission mechanism and the scissor arm assembly. A resistance mechanism is provided on the base, the worktable, or the handwheel. The resistance mechanism includes an adjustment knob, which can adjust the rotational resistance of the resistance mechanism to the handwheel.

[0006] Furthermore, the handwheel is provided with a first slide groove, and the resistance mechanism includes an adjustment knob, a first slider and a spring. The first slider is slidably disposed in the first slide groove. The first slider is close to the first end of the first slide groove. The first slider is provided with a first protrusion that passes through the handwheel. The screw of the adjustment knob is threadedly assembled with the second end of the first slide groove. The spring is disposed in the first slide groove and can provide elastic force to make the first protrusion abut against the worktable or base.

[0007] Furthermore, a second protrusion is provided at the end of the screw facing the first slider.

[0008] Furthermore, a second slide groove is provided on the workbench or base. The resistance mechanism includes a first slider, a spring, and an adjustment knob. The first slider is slidably disposed in the second slide groove. The first slider is close to the first end of the second slide groove. A first protrusion is provided on the first slider that passes through the handwheel. The screw of the adjustment knob is threadedly assembled with the second end of the second slide groove. The spring is disposed in the second slide groove and can provide elastic force to make the first protrusion abut against the handwheel.

[0009] Furthermore, the handwheel is provided with a locking knob for limiting the rotation of the handwheel.

[0010] Furthermore, the handwheel includes a wheel frame and an anti-slip sleeve, the wheel frame is connected to the lead screw, and the anti-slip sleeve is disposed on the outer side of the wheel frame.

[0011] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0012] This application, by setting a resistance mechanism and adjusting knob, allows the rotational resistance of the handwheel to be adjusted as needed, making it convenient for users to make low-speed fine adjustments or perform high-speed lifting and lowering.

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a front view of the lifting platform in Example 1;

[0015] Figure 2 This is an exploded view of the lifting platform in Example 1;

[0016] Figure 3 This is a partial cross-sectional view of the lifting platform located at the handwheel in Embodiment 1;

[0017] Figure 4 This is a partial cross-sectional view of the lifting platform located at the handwheel in Example 2.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Base; 11. Second slide rail; 2. Worktable; 3. Scissor arm assembly; 4. Transmission mechanism; 41. Lead screw; 42. Nut; 5. Handwheel; 51. First slide rail; 52. Locking knob; 53. Wheel frame; 54. Anti-slip sleeve; 6. Resistance mechanism; 61. Adjustment knob; 611. Screw; 612. Second protrusion; 62. First slider; 621. First protrusion; 63. Spring; 7. Mounting base. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise" and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0022] Example 1

[0023] like Figure 1 and Figure 2 As shown, a lifting platform includes: a base 1, a worktable 2, a scissor arm assembly 3, a transmission mechanism 4, and a handwheel 5. The scissor arm assembly 3 is mounted on the base 1, and the worktable 2 is mounted on the scissor arm assembly 3. The transmission mechanism 4 includes a lead screw 41 and a nut 42. The lead screw 41 is rotatably mounted on the worktable 2 or the base 1, and the nut 42 is mounted on the scissor arm assembly 3. The handwheel 5 is connected to the lead screw 41. When the handwheel 5 rotates, it can drive the worktable 2 to rise or fall through the transmission mechanism 4 and the scissor arm assembly 3.

[0024] In this embodiment, the lead screw 41 is rotatably mounted on the worktable 2, and a mounting base 7 is provided on the side wall of the worktable 2. The shaft of the lead screw 41 passes through the mounting base 7 and is connected to the handwheel 5. In other embodiments, the lead screw 41 is rotatably mounted on the base 1, and correspondingly, the mounting base 7 is also provided on the side wall of the base 1.

[0025] The handwheel 5 includes a wheel frame 53 and an anti-slip sleeve 54. The wheel frame 53 is connected to the lead screw 41, and the anti-slip sleeve 54 is located on the outside of the wheel frame 53.

[0026] like Figure 3 As shown, in this embodiment, the resistance mechanism 6 is disposed on the handwheel 5. Specifically, a cylinder is disposed on the inner side of the wheel frame 53, and a first groove 51 is provided inside the cylinder. A first slider 62 is disposed in the first groove 51, close to the inner side of the first groove 51, and a first protrusion 621 is provided on the inner side of the first slider 62. The first protrusion 621 abuts against the mounting base 7 after penetrating the cylinder. The screw 611 of the adjusting knob 61 is threadedly assembled with the outer side of the first groove 51. A spring 63 is disposed in the first groove 51 and located between the first slider 62 and the screw 611. The spring 63 can provide elastic force to make the first protrusion 621 abut against the mounting base 7. In use, turning the adjusting knob 61 can compress or expand the spring 63, increase or decrease the elastic force of the spring 63 on the first slider 62, thereby increasing or decreasing the friction between the first protrusion 621 and the mounting base 7, thereby increasing or decreasing the rotational resistance of the handwheel 5.

[0027] In order to lock the height of the worktable 2, a second protrusion 612 is provided on the inner side of the screw 611. In use, when the height of the worktable 2 is adjusted to the desired position, the adjustment knob 61 is turned so that the second protrusion 612 approaches and abuts against the first slider 62, further increasing the friction between the first protrusion 621 and the mounting base 7, until the handwheel 5 and the mounting base 7 are locked together.

[0028] In another embodiment, the first protrusion 621 can directly abut against the base 1 or the worktable 2.

[0029] Example 2

[0030] This embodiment has a structure that is largely the same as that of Embodiment 1, the difference being the location of the resistance mechanism 6.

[0031] like Figure 4 As shown, in this embodiment, the resistance mechanism 6 is mounted on the mounting base 7. A cylinder is provided on the inner wall of the mounting base 7, and a second sliding groove 11 is provided inside the cylinder. The second sliding groove 11 is arranged radially along the handwheel 5. A first slider 62 is disposed within the second sliding groove 11, located inside the second sliding groove 11, and a first protrusion 621 penetrating the cylinder is provided on the inner side of the first slider 62. The screw 611 of the adjusting knob 61 is threadedly fitted to the outer side of the second sliding groove 11. A spring 63 is disposed within the second sliding groove 11, located between the first slider 62 and the screw 611. The spring 63 provides the elastic force that causes the first protrusion 621 to abut against the handwheel 5 (specifically, the wheel frame 53). In use, turning the adjusting knob 61 compresses or expands the spring 63, increasing or decreasing the elastic force of the spring 63 on the first slider 62, thereby increasing or decreasing the friction between the first protrusion 621 and the mounting base 7, and thus increasing or decreasing the rotational resistance of the handwheel 5.

[0032] In order to lock the height of the worktable 2, the handwheel 5 is equipped with a locking knob 52. The threaded end of the locking knob 52 is threadedly assembled with the wheel frame 53. When the locking knob 52 is turned, the threaded end of the locking knob 52 can abut against the mounting base 7 to increase the friction between the locking knob 52 and the mounting base 7 until the handwheel 5 and the mounting base 7 are locked together.

[0033] In another embodiment, the second slide 11 is formed on the base 1 or the worktable 2, and the resistance mechanism 6 is directly disposed on the base 1 or the worktable 2.

[0034] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A lift table comprising: The system comprises a base (1), a worktable (2), a scissor arm assembly (3), a transmission mechanism (4), and a handwheel (5). The scissor arm assembly (3) is mounted on the base (1), and the worktable (2) is mounted on the scissor arm assembly (3). The transmission mechanism (4) includes a lead screw (41) and a nut (42). The lead screw (41) is rotatably mounted on the worktable (2) or the base (1), and the nut (42) is mounted on the scissor arm assembly (3). The handwheel (5) is connected to the lead screw (41). When the handwheel (5) rotates, it can drive the worktable (2) to rise or fall through the transmission mechanism (4) and the scissor arm assembly (3). Its features include: A resistance mechanism (6) is provided on the base (1), workbench (2) or handwheel (5). The resistance mechanism (6) includes an adjustment knob (61), which can adjust the rotational resistance of the resistance mechanism (6) to the handwheel (5).

2. The lifting platform according to claim 1, characterized in that, The handwheel (5) is provided with a first slide groove (51). The resistance mechanism (6) includes an adjustment knob (61), a first slider (62), and a spring (63). The first slider (62) is slidably disposed in the first slide groove (51). The first slider (62) is close to the first end of the first slide groove (51). The first slider (62) is provided with a first protrusion (621) that penetrates the handwheel (5). The screw (611) of the adjustment knob (61) is threadedly assembled with the second end of the first slide groove (51). The spring (63) is disposed in the first slide groove (51). The spring (63) can provide elastic force to make the first protrusion (621) abut against the worktable (2) or the base (1).

3. The lift table according to claim 2, wherein The screw (611) has a second protrusion (612) at one end facing the first slider (62).

4. The lift table of claim 1, wherein, The workbench (2) or base (1) is provided with a second slide groove (11). The resistance mechanism (6) includes a first slider (62), a spring (63) and an adjustment knob (61). The first slider (62) is slidably disposed in the second slide groove (11). The first slider (62) is close to the first end of the second slide groove (11). The first slider (62) is provided with a first protrusion (621) that passes through the handwheel (5). The screw (611) of the adjustment knob (61) is threadedly assembled with the second end of the second slide groove (11). The spring (63) is disposed in the second slide groove (11). The spring (63) can provide elastic force to make the first protrusion (621) abut against the handwheel (5).

5. The lift table according to claim 4, wherein The handwheel (5) is provided with a locking knob (52) for limiting the rotation of the handwheel (5).

6. The lift table of claim 1, wherein, The handwheel (5) includes a wheel frame (53) and an anti-slip sleeve (54). The wheel frame (53) is connected to the lead screw (41), and the anti-slip sleeve (54) is located on the outside of the wheel frame (53).

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