Stretching structure

Abstract

The utility model provides a stretching structure. The stretching structure comprises an upper support and a lower support which are distributed up and down, the shear fork assembly is connected between the upper support and the lower support, and the distance L between the upper support and the lower support is adjusted through the shear fork assembly; the gear adjusting mechanism is mounted on the shear fork assembly and is in multi-gear clamping with the shear fork assembly, so that the distance L can be adjusted and locked in a multi-gear manner; the gear adjusting mechanism is arranged on the shear fork assembly, and the gear adjusting mechanism and the shear fork assembly are clamped in a multi-gear mode through the step-shaped clamping teeth and the clamping grooves, so that the distance L between the upper support and the lower support is adjusted and locked in a multi-gear mode, and the problems that in the prior art, a common lifting adjusting mechanism is single in height adjusting function, and the height adjusting function is complex are solved. Particularly, multi-gear adjustment and locking cannot be performed on the height.

Description

Technical Field

[0001] This utility model relates to the field of height adjustment mechanism technology, and in particular to an extension structure. Background Technology

[0002] The height of components such as workbenches needs to be adjusted according to different work scenarios, which usually requires the use of a lifting and adjusting mechanism.

[0003] However, the height adjustment function of ordinary lifting and adjusting mechanisms in existing technical solutions is limited, especially in that they cannot adjust and lock the height in multiple positions. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an extension structure. By setting a gear adjustment mechanism on the scissor lift assembly, the gear adjustment mechanism and the scissor lift assembly can engage in multiple gear positions through stepped teeth and grooves, so that the distance L between the upper and lower supports can be adjusted and locked in multiple positions. This solves the technical problems of existing ordinary lifting adjustment mechanisms having a single height adjustment function, especially the inability to adjust and lock the height in multiple positions.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An extension structure includes: an upper support and a lower support arranged vertically; a scissor lift assembly connected between the upper and lower supports, the scissor lift assembly including a first scissor lift and a second scissor lift hinged to each other, the left ends of the first and second scissor lifts being hinged to the upper and lower supports respectively, and the right ends being slidably disposed on the upper and lower supports respectively, the scissor lift assembly being used to adjust the distance L between the upper and lower supports; and a gear adjustment mechanism, the gear adjustment mechanism being mounted on the scissor lift assembly and engaging with the scissor lift assembly in multiple gear positions, so that the distance L can be adjusted and locked in multiple gear positions.

[0007] Preferably, the gear adjustment mechanism includes: a locking part, the lower end of which is hinged to the first scissor fork of the scissor fork assembly and the upper end is provided with locking teeth; the second scissor fork of the scissor fork assembly is provided with locking grooves that match and engage with the locking teeth; the locking teeth are provided in a plurality of steps and are arranged in a stepped manner; the locking grooves are also provided in a plurality of steps and are arranged in a stepped manner.

[0008] Preferably, the centers of the first and second scissor branches are hinged to each other, the engaging portion is hinged between the center and end of the first scissor branch, and the slot is disposed between the center and end of the second scissor branch.

[0009] Preferably, the gear adjustment mechanism further includes a pull rope connected to the upper end of the engaging part, which is used to pull the engaging part to separate the locking teeth from the locking groove.

[0010] Preferably, a limiting ring is provided at the edge of the lower support, and the pull rope passes through the limiting ring.

[0011] Preferably, the gear adjustment mechanism further includes an elastic element A, which is connected and disposed between the upper end of the engaging portion and the second scissor fork, and is used to pull the engaging portion in the opposite direction to the pull rope so that the locking teeth engage with the locking groove.

[0012] Preferably, one end of the elastic member A is mounted on the upper end of the engaging portion, and the other end is mounted on the second scissor fork and located between the center and the end of the second scissor fork.

[0013] Preferably, the right ends of the first and second scissor lifts are provided with sliding pins, and the upper and lower supports are provided with corresponding horizontal grooves, with the sliding pins being slidably limited and installed in the grooves.

[0014] Preferably, the system further includes a locking structure, which includes a locking member. One end of the locking member is hinged to the lower support, and the other end is recessed in a locking groove on the side facing the sliding pin. When the sliding pin slides to the inner end of the groove, the sliding pin engages with the locking groove.

[0015] Preferably, the locking structure further includes: an elastic element B, one end of which is mounted on the locking member and located between the hinge point of the locking member and the lower support and the locking groove, and the other end of which is mounted on the lower support at the inner end position opposite to the sliding groove; an elastic element C is horizontally connected between the first scissor fork and the second scissor fork, and the first scissor fork and the second scissor fork are pulled by the elastic element C to make the sliding pin slide to the inner end of the sliding groove, while the locking member is pulled by the elastic element B to rotate until the locking groove engages with the sliding pin.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) This utility model provides a gear adjustment mechanism on the scissor fork assembly. The gear adjustment mechanism and the scissor fork assembly are engaged in multiple gears through stepped teeth and slots, so that the distance L between the upper and lower supports can be adjusted and locked in multiple gears to meet the adjustment needs of different heights.

[0018] (2) This utility model is provided with a pull rope and an elastic element A. The pull rope is used to pull the engaging part to separate the locking teeth from the slot, thereby switching and adjusting the height level. The elastic element A pulls the engaging part in the opposite direction to the pull rope to engage the locking teeth with the slot, thereby locking the height level after the switching and adjustment. The two work together to achieve convenient and quick level adjustment and automatic locking.

[0019] (3) This utility model sets up an elastic element C to cooperate with a locking structure. The elastic element C pulls the first scissor fork and the second scissor fork so that the sliding pin slides to the inner end of the slide groove. At the same time, the elastic element B pulls the locking element to rotate until the locking groove engages with the sliding pin, thereby automatically achieving position locking. The structure is ingenious. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the extended structure in the retracted state in Example 2;

[0021] Figure 2 This is a schematic diagram of the extension structure in the first unfolded state in Example 2;

[0022] Figure 3 This is a schematic diagram of the extension structure in the second unfolded state in Example 2;

[0023] Figure 4 This is a schematic diagram of the extension structure in the third unfolded state in Example 2;

[0024] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 6 for Figure 3 Enlarged view at point B in the middle;

[0026] Figure 7 for Figure 4 Enlarged view at point C;

[0027] Figure 8 This is a schematic diagram of the extended structure in the retracted state in Example 3;

[0028] Figure 9 This is a schematic diagram of the extension structure in the deployed and locked state in Embodiment 3;

[0029] Figure 10 for Figure 9 Enlarged view of point D in the middle. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] Example 1

[0034] like Figure 1-2 As shown, an extension structure includes: an upper support 11 and a lower support 12 arranged vertically; a scissor lift assembly 13 connected between the upper support 11 and the lower support 12, the scissor lift assembly 13 including a first scissor lift 14 and a second scissor lift 15 hinged to each other, the left ends of the first scissor lift 14 and the second scissor lift 15 being hinged to the upper support 11 and the lower support 12 respectively, and the right ends being slidably disposed on the upper support 11 and the lower support 12 respectively, the distance L between the upper support 11 and the lower support 12 being adjusted by the scissor lift assembly 13; and a gear adjustment mechanism 2, the gear adjustment mechanism 2 being mounted on the scissor lift assembly 13 and engaging with the scissor lift assembly 13 in multiple gears, so that the distance L can be adjusted and locked in multiple gears.

[0035] As a preferred option, such as Figure 5As shown, the gear adjustment mechanism 2 includes: a locking part 21, the lower end of which is hinged to the first scissor fork 14 of the scissor fork assembly 13 and the upper end is provided with locking teeth 22. The second scissor fork 15 of the scissor fork assembly 13 is provided with locking grooves 23 that match and engage with the locking teeth 22. There are a plurality of locking teeth 22 arranged in a stepped manner, and there are also a plurality of locking grooves 23 arranged in a stepped manner.

[0036] In this embodiment, by providing a gear adjustment mechanism 2 on the scissor lift assembly 13, the gear adjustment mechanism 2 and the scissor lift assembly 13 are engaged in multiple gears through stepped teeth 22 and slots 23, thereby allowing the distance L between the upper support 11 and the lower support 12 to be adjusted and locked in multiple gears to adapt to the adjustment needs of different heights.

[0037] Preferably, the centers of the first scissor fork 14 and the second scissor fork 15 are hinged to each other, the engaging part 21 is hinged between the center and the end of the first scissor fork 14, and the slot 23 is disposed between the center and the end of the second scissor fork 15.

[0038] As a preferred option, such as Figure 2 As shown, the gear adjustment mechanism 2 further includes a pull rope 24, which is connected to the upper end of the engaging part 21 and is used to pull the engaging part 21 to separate the locking teeth 22 from the locking groove 23.

[0039] Preferably, a limiting ring 16 is provided at the edge of the lower support 12, and the pull rope 24 passes through the limiting ring 16.

[0040] As a preferred option, such as Figure 2 As shown, the right ends of the first scissor lift 14 and the second scissor lift 15 are provided with sliding pins 17, and the upper support 11 and the lower support 12 are respectively provided with horizontally corresponding sliding grooves 18, and the sliding pins 17 are slidably limited and installed in the sliding grooves 18.

[0041] Example 2

[0042] The components in this embodiment that are the same as or corresponding to those in the above embodiments are referred to by the same reference numerals as those in the above embodiments. For the sake of simplicity, only the differences between this embodiment and the above embodiments are described below. The difference between this embodiment and the above embodiments is that:

[0043] As a preferred option, such as Figure 5-7 As shown, the gear adjustment mechanism 2 further includes an elastic element A25, which is connected and disposed between the upper end of the engaging part 21 and the second scissor 15. It is used to pull the engaging part 21 in the opposite direction to the pull rope 24 so that the locking teeth 22 engage with the locking groove 23.

[0044] In this embodiment, by providing a pull cord 24 and an elastic element A25, the pull cord 24 is used to pull the engaging part 21 to separate the locking teeth 22 from the locking groove 23, thereby switching and adjusting the height level. The elastic element A25 pulls the engaging part 21 in the opposite direction to the pull cord 24 to engage the locking teeth 22 with the locking groove 23, thereby locking the height level after the switching and adjustment. The two work together to achieve convenient and quick level adjustment and automatic locking.

[0045] Preferably, one end of the elastic member A25 is mounted on the upper end of the engaging part 21, and the other end is mounted on the second scissor 15 and located between the center and the end of the second scissor 15.

[0046] Example 3

[0047] The components in this embodiment that are the same as or corresponding to those in the above embodiments are referred to by the same reference numerals as those in the above embodiments. For the sake of simplicity, only the differences between this embodiment and the above embodiments are described below. The difference between this embodiment and the above embodiments is that:

[0048] As a preferred option, such as Figure 8-9 As shown, it also includes: a locking structure 3, the locking structure 3 including a locking member 31, one end of the locking member 31 is hinged to the lower support 12, and the other end is recessed with a locking groove 32 on the side facing the sliding pin 17. When the sliding pin 17 slides to the inner end 181 of the groove 18, the sliding pin 17 is just engaged with the locking groove 32.

[0049] As a preferred option, such as Figure 10 As shown, the locking structure 3 further includes: an elastic element B33, one end of which is mounted on the locking member 31 and located between the hinge point of the locking member 31 and the lower support 12 and the locking groove 32; the other end of which is mounted on the lower support 12 at the position directly opposite the inner end 181 of the slide groove 18; an elastic element C4 is horizontally connected between the first scissor fork 14 and the second scissor fork 15. The elastic element C4 pulls the first scissor fork 14 and the second scissor fork 15 to make the sliding pin 17 slide to the inner end 181 of the slide groove 18, while the elastic element B33 pulls the locking member 31 to rotate until the locking groove 32 engages with the sliding pin 17.

[0050] In this embodiment, by setting the elastic element C4 to cooperate with the locking structure 3, the elastic element C4 pulls the first scissor fork 14 and the second scissor fork 15 to make the sliding pin 17 slide to the inner end 181 of the slide groove 18. At the same time, the elastic element B33 pulls the locking element 31 to rotate to the locking groove 32 to engage with the sliding pin 17, thereby automatically achieving position locking. The structure is ingenious.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An extension structure, characterized in that, include: The upper support (11) and lower support (12) are arranged vertically. A scissor lift assembly (13) is connected between the upper support (11) and the lower support (12). The scissor lift assembly (13) includes a first scissor lift (14) and a second scissor lift (15) that are hinged to each other. The left ends of the first scissor lift (14) and the second scissor lift (15) are respectively hinged to the upper support (11) and the lower support (12), and the right ends are respectively slidably disposed on the upper support (11) and the lower support (12). The distance L between the upper support (11) and the lower support (12) is adjusted by the scissor lift assembly (13). as well as Gear adjustment mechanism (2) is installed on the scissor lift assembly (13) and engages with the scissor lift assembly (13) in multiple gear positions so that the distance L can be adjusted and locked in multiple gear positions.

2. The extension structure according to claim 1, characterized in that, The gear adjustment mechanism (2) includes: The engaging part (21) has its lower end hinged to the first scissor fork (14) of the scissor fork assembly (13) and its upper end provided with a locking tooth (22). The second scissor fork (15) of the scissor fork assembly (13) is provided with a locking groove (23) that matches and engages with the locking tooth (22). The locking tooth (22) is provided in a plurality of steps and the locking groove (23) is also provided in a plurality of steps.

3. The extension structure according to claim 2, characterized in that, The centers of the first scissor bar (14) and the second scissor bar (15) are hinged to each other, the engaging part (21) is hinged between the center and the end of the first scissor bar (14), and the slot (23) is provided between the center and the end of the second scissor bar (15).

4. The extension structure according to claim 2, characterized in that, The gear adjustment mechanism (2) also includes: A pull cord (24) is connected to the upper end of the engaging part (21) and is used to pull the engaging part (21) to separate the locking tooth (22) from the locking groove (23).

5. The extension structure according to claim 4, characterized in that, The lower support (12) is provided with a limiting ring (16) at its edge, and the pull rope (24) passes through the limiting ring (16).

6. The extension structure according to claim 4, characterized in that, The gear adjustment mechanism (2) also includes: Elastic element A (25) is connected between the upper end of the engaging part (21) and the second scissor fork (15), and is used to pull the engaging part (21) in the opposite direction to the pull rope (24) so ​​that the locking tooth (22) engages with the locking groove (23).

7. The extension structure according to claim 6, characterized in that, One end of the elastic member A (25) is mounted on the upper end of the engaging part (21), and the other end is mounted on the second scissor (15) and located between the center and the end of the second scissor (15).

8. The extension structure according to claim 1, characterized in that, The right ends of the first scissor lift (14) and the second scissor lift (15) are provided with sliding pins (17), and the upper support (11) and the lower support (12) are respectively provided with horizontal grooves (18), and the sliding pins (17) are slidably limited and installed in the grooves (18).

9. The extension structure according to claim 8, characterized in that, Also includes: The locking structure (3) includes a locking member (31). One end of the locking member (31) is hinged to the lower support (12), and the other end is recessed in a locking groove (32) on the side facing the sliding pin (17). When the sliding pin (17) slides to the inner end (181) of the groove (18), the sliding pin (17) is engaged with the locking groove (32).

10. The extension structure according to claim 9, characterized in that, The locking structure (3) further includes: Elastic element B (33), one end of which is mounted on the locking element (31) and located between the hinge point of the locking element (31) and the lower support (12) and the locking groove (32), and the other end of which is mounted on the lower support (12) at the position of the inner end (181) of the slide groove (18); An elastic element C (4) is horizontally connected between the first scissor bar (14) and the second scissor bar (15). The elastic element C (4) pulls the first scissor bar (14) and the second scissor bar (15) to make the sliding pin (17) slide to the inner end (181) of the groove (18). At the same time, the elastic element B (33) pulls the locking element (31) to rotate until the locking groove (32) engages with the sliding pin (17).

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