Rotary tensioning mechanism

Abstract

The utility model relates to the field of mechanical structure relates to a kind of rotary tensioning mechanism, the utility model includes: handle, screw rod, tensioning positioning block and bushing, the tensioning positioning block is fixed on upper plate, the bushing is fixed on lower plate, the bushing is equipped with passageway inside, the handle lower end rotation is arranged in the inside of tensioning positioning block, the screw rod is connected in the inside of tensioning positioning block and the upper end of screw rod is connected in the inside of handle, the screw rod bottom is equipped with the taper head of increasing width downward, the tensioning positioning block bottom is equipped with tensioning sleeve, the tensioning sleeve is sleeved on screw rod and located in passageway, the tensioning sleeve bottom is equipped with the protrusion of hooking bushing bottom, vertical through slot is equipped at interval on the tensioning sleeve, the connecting mode of hooking bushing by the taper head of screw rod to push tensioning sleeve to expand, connection is stable and reliable, the quick connection of the upper plate and lower plate of automobile gauge is realized.

Description

Technical Field

[0001] This utility model relates to the field of mechanical structures, and specifically to a rotary tensioning mechanism. Background Technology

[0002] In the field of automotive fixtures, fixtures typically consist of an upper plate and a lower plate. Traditional installation methods for the upper and lower plates often involve bolt connections. This conventional method requires tightening multiple bolts one by one, which is not only cumbersome but also inefficient, significantly impacting the assembly progress of automotive fixtures. Furthermore, frequent bolt removal and installation can lead to thread wear, reducing the reliability and lifespan of the connection structure and increasing maintenance and time costs. Therefore, there is an urgent need for a mechanism that enables rapid and secure connections to meet the requirements of efficient assembly and stable use of automotive fixtures. Utility Model Content

[0003] This invention provides a rotary tensioning mechanism to address the problems of existing technologies.

[0004] The objective of this utility model can be achieved through the following technical solution: A rotary tensioning mechanism includes a handle, a screw, a tensioning positioning block, and a bushing. The tensioning positioning block is fixed on an upper plate, and the bushing is fixed on a lower plate. The bushing has a channel inside. The lower end of the handle is rotatably disposed inside the tensioning positioning block. The screw is threadedly connected to the inside of the tensioning positioning block, and the upper end of the screw is connected to the inside of the handle. The bottom of the screw has a tapered head with a downwardly increasing width. The bottom of the tensioning positioning block has a tensioning sleeve. The tensioning sleeve is fitted onto the screw and located inside the channel. The bottom of the tensioning sleeve has a protrusion that hooks onto the bottom of the bushing. Vertical through grooves are spaced apart on the tensioning sleeve.

[0005] In a further improvement, the width of the protrusion is increased along the middle on both the upper and lower sides.

[0006] As a further improvement, the upper end of the vertical through groove is provided with an arc-shaped groove.

[0007] In a further improvement, the upper end of the tensioning positioning block is provided with a limiting hole, and the lower end of the handle is provided with an annular groove. The annular groove is located inside the tensioning positioning block, and the height of the annular groove is greater than the height of the limiting hole. A positioning pin is provided inside the limiting hole and the annular groove.

[0008] As a further improvement, the limiting holes are arranged in two sets symmetrically.

[0009] In a further improvement, the upper end of the tensioning positioning block is provided with a second limiting hole, and the middle part of the screw is provided with a second annular groove. The second annular groove is located inside the tensioning positioning block, and the height of the second annular groove is set to be greater than the height of the second limiting hole. The second limiting hole and the second annular groove are provided with a second positioning pin.

[0010] Compared with the prior art, the advantages of the rotary tensioning mechanism of this utility model are as follows:

[0011] The rotary tensioning mechanism enables rapid connection between the upper and lower plates of the automotive inspection fixture, greatly improving connection efficiency and shortening assembly time. Simultaneously, the connection method, where the screw's conical head pushes the tensioning sleeve to open and hook the bushing, ensures a stable and reliable connection. This avoids thread wear caused by frequent bolt disassembly and assembly, extending the service life of the connection structure, reducing maintenance and time costs, and guaranteeing the stable use of the automotive inspection fixture. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the present invention.

[0013] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0014] Figure 3 This is a schematic diagram of a partial structure of the present invention.

[0015] In the figure, 1-handle, 11-annular groove one, 2-screw, 21-cone head, 22-annular groove two, 3-tensioning positioning block, 31-tensioning sleeve, 32-protrusion, 33-vertical through groove, 34-limiting hole one, 35-limiting hole two, 4-shield, 41-channel, 7-positioning pin one, 8-positioning pin two. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 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, and therefore should not be construed as a limitation of this utility model; unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to fixed connections or detachable connections, etc. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] The following describes the embodiments and appendices. Figures 1-3 The technical solution of this utility model will be further described below.

[0018] Example 1

[0019] A rotary tensioning mechanism includes: a handle 1, a screw 2, a tensioning positioning block 3, and a bushing 4. The tensioning positioning block 3 is fixed to an upper plate, and the bushing 4 is fixed to a lower plate. The bushing 4 has a channel 41 inside. The lower end of the handle 1 is rotatably disposed inside the tensioning positioning block 3. The screw 2 is threadedly connected to the inside of the tensioning positioning block 3, and the upper end of the screw 2 is connected to the inside of the handle 1. The bottom of the screw 2 has a tapered head 21 with a downwardly increasing width. The bottom of the tensioning positioning block 3 has a tensioning sleeve 31, which is sleeved on the screw 2 and located inside the channel 41. The bottom of the tensioning sleeve 31 has a protrusion 32 that hooks the bottom of the bushing 4, and the tensioning sleeve 31 has vertical through grooves 33 spaced apart.

[0020] like Figures 1-3 As shown, the rotary tensioning mechanism in this embodiment mainly consists of a handle 1, a screw 2, a tensioning positioning block 3, and a bushing 4. In use, the components consisting of the handle 1, tensioning positioning block 3, and screw 2 are placed inside the upper plate (not shown in the figure), and the bushing 4 is fixed to the lower plate (not shown in the figure). When the lower plate serves as a fixed base plate and the upper plate as a detachable component plate, rotating the handle 1 causes the screw 2 to rotate. Since the lower end of the handle 1 is rotatably positioned inside the tensioning positioning block 3, and the screw 2 is threadedly connected to the tensioning positioning block 3 and connected to the handle 1, rotating the handle 1 drives the screw 2 to rotate. When the screw 2 rotates, due to its threaded connection with the tensioning positioning block 3, the screw 2 moves downwards. The tapered head 21, whose width increases downwards at the bottom of the screw 2, moves downwards accordingly, pushing the tensioning sleeve 31 at the bottom of the tensioning positioning block 3 outwards. The tensioning sleeve 31 is fitted onto the screw 2 and located within the channel 41 of the bushing 4. When the tensioning sleeve 31 expands, the protrusion 32 at the bottom can hook onto the bottom of the bushing 4, thereby quickly connecting the upper plate and the lower plate together. Compared with conventional bolt connections, this connection method eliminates the need to tighten each bolt individually; a quick connection can be achieved simply by rotating the handle.

[0021] The rotary tensioning mechanism enables a quick connection between the upper and lower plates of the automotive fixture, greatly improving connection efficiency and shortening assembly time. Simultaneously, the connection method, where the conical head 21 of the screw 2 pushes the tensioning sleeve 31 to open and hook the bushing 4, ensures a stable and reliable connection. This avoids thread wear caused by frequent bolt disassembly and assembly, extending the service life of the connection structure, reducing maintenance and time costs, and guaranteeing the stable use of the automotive fixture.

[0022] In a further preferred embodiment, the width of the protrusion 32 increases along the middle of its upper and lower sides. Conventional protrusion structures experience concentrated stress when hooking the bottom of the bushing 4, which can easily lead to stress concentration and damage to the protrusion. However, in this preferred embodiment, the increased width of the protrusion 32 along the middle of its upper and lower sides increases the contact area between the protrusion 32 and the bottom of the bushing 4 when the tensioning sleeve 31 expands and hooks the bottom of the bushing 4, resulting in a more even and distributed force distribution.

[0023] As a further preferred embodiment, the upper end of the vertical through groove 33 has an arc-shaped groove. In conventional vertical through grooves, when the tensioning sleeve 31 is pushed outward by the cone head 21 of the screw 2, the stress at its end is relatively concentrated, making it prone to tearing and other damage. However, the arc-shaped groove design at the upper end of the vertical through groove 33 guides the deformation of the tensioning sleeve 31 during its expansion process, making the deformation more uniform and dispersing the stress at the end.

[0024] As a further preferred embodiment, the tensioning positioning block 3 has a limiting hole 34 at its upper end, and the handle 1 has an annular groove 11 at its lower end. The annular groove 11 is located inside the tensioning positioning block 3, and its height is greater than the height of the limiting hole 34. A positioning pin 7 is provided within both the limiting hole 34 and the annular groove 11. Conventional handle-tensioning positioning block connections may result in instability and wobbling during handle rotation. In this configuration, the positioning pin 7 passes through the limiting hole 34 and the annular groove 11. Because the height of the annular groove 11 is greater than the height of the limiting hole 34, the handle 1 can rotate around the positioning pin 7 within a certain range. Simultaneously, the two symmetrically arranged limiting holes 34 and positioning pins 7 can limit the wobbling of the handle 1 during rotation, ensuring the stability and accuracy of the handle 1's rotation.

[0025] As a further preferred embodiment, two sets of the limiting holes 34 are symmetrically arranged.

[0026] As a further preferred embodiment, the tensioning positioning block 3 has a limiting hole 35 at its upper end, and the screw 2 has an annular groove 22 in its middle. The annular groove 22 is located inside the tensioning positioning block 3, and its height is greater than the height of the limiting hole 35. A positioning pin 8 is provided inside the limiting hole 35 and the annular groove 22. In a conventional connection between the screw and the tensioning positioning block, axial movement or uneven rotation may occur during the screw's rotation and vertical movement. The positioning pin 8 passes through the limiting hole 35 and the annular groove 22. Because the height of the annular groove 22 is greater than the height of the limiting hole 35, the screw 2 can move and rotate axially within a certain range. Simultaneously, the positioning pin 8 restricts the axial movement of the screw 2, ensuring the stability and accuracy of the screw 2 during rotation and vertical movement.

[0027] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A rotary tensioning mechanism, characterized in that, include: The device comprises a handle, a screw, a tensioning positioning block, and a bushing. The tensioning positioning block is fixed to the upper plate, and the bushing is fixed to the lower plate. The bushing has a channel inside. The lower end of the handle is rotatably disposed inside the tensioning positioning block. The screw is threadedly connected to the inside of the tensioning positioning block, and the upper end of the screw is connected to the inside of the handle. The bottom of the screw has a tapered head with a downwardly increasing width. The bottom of the tensioning positioning block has a tensioning sleeve, which is fitted onto the screw and located within the channel. The bottom of the tensioning sleeve has a protrusion that hooks onto the bottom of the bushing, and the tensioning sleeve has vertical through grooves spaced apart.

2. The rotary tensioning mechanism according to claim 1, characterized in that, The width of the protrusion increases along the middle on both the upper and lower sides.

3. The rotary tensioning mechanism according to claim 1, characterized in that, The upper end of the vertical through groove has an arc-shaped groove.

4. The rotary tensioning mechanism according to claim 1, characterized in that, The upper end of the tensioning positioning block is provided with a limiting hole, and the lower end of the handle is provided with an annular groove. The annular groove is located inside the tensioning positioning block, and the height of the annular groove is greater than the height of the limiting hole. A positioning pin is provided in the limiting hole and the annular groove.

5. A rotary tensioning mechanism according to claim 4, characterized in that, The limiting holes are arranged in two sets symmetrically.

6. A rotary tensioning mechanism according to claim 1, characterized in that, The upper end of the tensioning positioning block is provided with a limiting hole two, and the middle part of the screw is provided with an annular groove two. The annular groove two is located inside the tensioning positioning block, and the height of the annular groove two is set to be greater than the height of the limiting hole two. The limiting hole two and the annular groove two are provided with positioning pin two.

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