Chain tensioning mechanism and underframe

Abstract

The utility model relates to the technical field of laser cutting, and discloses a chain tensioning mechanism and an underframe. The chain tensioning mechanism comprises a mounting seat, two pressing strips, a tensioning seat, a first chain wheel and a second chain wheel; the mounting seat is fixedly connected with the underframe; the two pressing strips are fixedly connected with the mounting seat and are arranged up and down; the tensioning seat is arranged between the two pressing strips in a sliding manner; the elastic screw rod is in threaded connection with the mounting seat; the tail part of the elastic screw rod is used for abutting against the side wall of the tensioning seat, and the head part of the elastic screw rod faces the second chain wheel. According to the chain tensioning mechanism, two pressing strips are used for guiding the movement of a tensioning seat in the front-back direction and limiting the movement of the tensioning seat in the up-down direction; the tensioning screw is in threaded connection with the mounting seat, so that the position of the tensioning seat relative to the mounting seat can be changed, the tensioning degree of the chain can be adjusted, and the adjusting process is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting, in particular to a chain tensioning mechanism and a chassis. Background Art

[0002] Chain drive is one of the common driving methods. In order to ensure the convenience of installation and the accuracy of driving, the chain tension is generally set to be adjustable. For example, a wheel axle adjustment mechanism disclosed in application number 202323604072.0 limits the movement of the adjustment shaft in the forward and backward directions through an adjusting screw and an adjusting nut, as well as a locking screw and a locking nut. However, in actual use, the above-mentioned wheel axle adjustment mechanism requires not only turning the adjusting screw and the adjusting nut, but also turning the locking screw and the locking nut to adjust the chain tension, which is not convenient to use.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a chain tensioning mechanism and a chassis, aiming to improve the convenience of adjusting the chain tension.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A chain tensioning mechanism includes a mounting base for being fixed to a base frame, two pressure strips fixed to the mounting base and arranged above and below, a tensioning base slidably arranged between the two pressure strips, a first sprocket rotatably connected to the tensioning base, a second sprocket connected to the first sprocket through a chain transmission, and a tensioning screw threadedly connected to the mounting base; the tail of the tensioning screw is used to abut against the side wall of the tensioning base, and the head of the tensioning screw faces the second sprocket.

[0007] The chain tensioning mechanism described above, wherein the mounting seat includes a mounting base whose lower surface is fixed to the base frame, and a tensioning adjustment block arranged on the side wall of the mounting base; a waist-shaped hole is provided on the mounting base, and the extension direction of the waist-shaped hole is consistent with the extension direction of the chain; the tensioning seat is movably arranged in the waist-shaped hole; the tensioning adjustment block is threadedly connected to the tensioning screw.

[0008] In the chain tensioning mechanism, a tightening nut is threadedly connected to the rod body of the tightening screw, and the side wall of the tightening nut is used to abut against the side wall of the tensioning adjustment block.

[0009] The chain tensioning mechanism, wherein the tensioning seat includes a tensioning base plate and a central shaft fixed to the tensioning base plate; the central shaft passes through the middle of the tensioning base plate, and the inner end of the central shaft is rotatably connected to the first sprocket; the outer end of the central shaft passes through the waist-shaped hole; the side wall of the central shaft abuts against the tail of the tensioning screw.

[0010] In the chain tensioning mechanism, a vertical plane is provided on the outer end of the central shaft, and the vertical plane is used to contact the tail of the tensioning screw.

[0011] The chain tensioning mechanism, wherein the cross-section of the tensioning base plate is an isosceles trapezoid, the side walls of the two pressure strips facing each other are both configured as inclined surfaces, and the two inclined surfaces respectively abut against the upper surface or the lower surface of the tensioning base plate.

[0012] A chassis comprises a frame composed of a plurality of square tubes and the chain tensioning mechanism; an embedding opening is provided on the inner side surface of any of the square tubes, and a mounting seat of the chain tensioning mechanism is fixed in the embedding opening.

[0013] The chassis, wherein an inspection port is provided on the outer side surface of the square passage where the chain tensioning mechanism is provided.

[0014] Beneficial effects:

[0015] The utility model provides a chain tensioning mechanism and a base frame. The chain tensioning mechanism uses two pressure strips to provide guidance for the movement of the tensioning seat in the front and rear directions, and to limit its movement in the up and down directions; a tensioning screw is threadedly connected to the mounting seat, so that the position of the tensioning seat relative to the mounting seat can be changed, thereby realizing the adjustment of the chain tension, and the adjustment process is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the square rear chassis with one side hidden.

[0017] Figure 2 Schematic diagram of the chain tensioning mechanism.

[0018] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0019] Figure 4 Schematic diagram of the local structure of the chain tensioning mechanism.

[0020] Description of main component symbols:

[0021] 10-chain tensioning mechanism, 1-mounting seat, 11-mounting base, 111-waist-shaped hole, 12-tensioning adjustment block, 2-pressing strip, 3-tensioning seat, 31-tensioning base plate, 32-middle axis, 321-vertical plane, 4-first sprocket, 5-second sprocket, 6-chain, 7-tensioning screw, 8-tensioning nut;

[0022] 20-base frame, 201-square tube, 202-embedded port, 203-inspection port. DETAILED DESCRIPTION

[0023] The present invention provides a chain tensioning mechanism and a chassis. To make the purpose, technical solution, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0024] See also Figures 1-4 The utility model provides a chain tensioning mechanism 10, including a mounting base 1 for being fixed to a base frame 20, two pressure strips 2 fixed to the mounting base 1 and arranged up and down, a tensioning base 3 slidably arranged between the two pressure strips 2, a first sprocket 4 rotatably connected to the tensioning base 3, a second sprocket 5 connected to the first sprocket 4 through a chain 6, and a tensioning screw 7 threadedly connected to the mounting base 1; the tail of the tensioning screw 7 is used to abut against the side wall of the tensioning base 3, and the head of the tensioning screw 7 faces the second sprocket 5.

[0025] In this embodiment, please refer to Figure 1 Chain tensioning mechanisms 10 are provided on both sides of the chassis 20. The two chain tensioning mechanisms 10 are respectively connected to the same transmission mechanism. That is, in this embodiment, the second sprockets 5 in the two chain tensioning mechanisms 10 are connected to the transmission mechanism. The second sprocket 5 is driven to rotate by the operation of the transmission mechanism, and the first sprocket 4 is driven by the chain 6 to rotate synchronously.

[0026] In actual use, please refer to Figure 2 and Figure 3 By twisting the tensioning screw 7 forward / reverse, the position of the tensioning seat 3 relative to the mounting seat 1 in length / forward and backward directions can be changed under the pulling action of the tail of the tensioning screw 7, thereby changing the spacing between the first sprocket 4 and the second sprocket 5, thereby achieving the tension of the chain 6 wound between the first sprocket 4 and the second sprocket 5. The adjustment process is simple and convenient.

[0027] The above-mentioned mechanism uses two pressure strips 2 to provide guidance for the movement of the tensioning seat 3 in the front and rear directions, and to limit its movement in the up and down directions; the tensioning screw 7 is threadedly connected to the mounting seat 1 to change the position of the tensioning seat 3 relative to the mounting seat 1, thereby realizing the adjustment of the tension of the chain 6, and the adjustment process is simple and convenient.

[0028] See also Figure 3 In some embodiments, the mounting base 1 includes a mounting base 11 whose lower surface is fixed to the base frame 20, and a tensioning adjustment block 12 disposed on the side wall of the mounting base 11. The mounting base 11 is provided with a waist-shaped hole 111, the extension direction of which is consistent with the extension direction of the chain 6. The tensioning seat 3 is movably disposed in the waist-shaped hole 111. The tensioning adjustment block 12 is threadedly connected to the tensioning screw 7. Specifically, the mounting base 11 is fixed to the upper surface of the base frame 20 and is L-shaped. The tensioning adjustment block 12 is located outside the mounting base 11, allowing staff to adjust the tensioning screw 7 on the tensioning adjustment block 12 from the outside. The provision of the waist-shaped hole 111 provides clearance for the movement of the tensioning seat 3.

[0029] See also Figure 3 In some embodiments, a tensioning nut 8 is threadedly connected to the body of the tensioning screw 7, and the sidewall of the tensioning nut 8 is configured to abut against the sidewall of the tensioning adjustment block 12. After adjusting the position of the tensioning screw 7, the tensioning nut 8 is used to reinforce the tensioning seat 3 to further limit the front-to-back movement, ensuring that the chain tensioning mechanism 10 does not shift during operation.

[0030] See also Figure 3 and Figure 4 In some embodiments, the tensioning seat 3 includes a tensioning base plate 31 and a central shaft 32 fixed to the tensioning base plate 31. The central shaft 32 passes through the middle of the tensioning base plate 31, and the inner end of the central shaft 32 is rotatably connected to the first sprocket 4. The outer end of the central shaft 32 passes through the waist-shaped hole 111. The sidewall of the central shaft 32 abuts the tail end of the tensioning screw 7. A through hole is formed in the middle of the tensioning base plate 31 for the central shaft 32 to pass through. The two are fixed together by welding. The outer end of the central shaft 32 can reciprocate within the waist-shaped hole 111.

[0031] See also Figure 3 In some embodiments, a vertical plane 321 is provided on the outer end of the central shaft 32. The vertical plane 321 is used to contact the tail of the tensioning screw 7. The outer peripheral surface of the shaft is generally an arc surface, and the vertical plane 321 formed can increase the contact area between the tail of the tensioning screw 7 and the central shaft 32.

[0032] See also Figure 4In some embodiments, the cross-section of the tensioning base 31 is an isosceles trapezoid, and the mutually facing sidewalls of the two pressure strips 2 are both configured as inclined surfaces, which respectively abut against the upper or lower surface of the tensioning base 31. By defining the shapes of the tensioning base 31 and the pressure strips 2, the tensioning base 31 can be limited in the vertical direction, which is an ingenious design.

[0033] See also Figure 1 A chassis 20 includes a frame formed of a plurality of square tubes 201 and the chain tensioning mechanism 10. Each of the square tubes 201 has an insertion opening 202 formed on its inner side, into which the mounting base 1 of the chain tensioning mechanism 10 is fixedly mounted. The provision of the square tubes 201 reduces the overall weight of the chassis 20, thereby facilitating transportation. It also facilitates the insertion of the mounting base 1 therein, thereby reducing the volume of the chain tensioning mechanism 10 and, consequently, the entire device.

[0034] See also Figure 1 In some embodiments, an inspection opening 203 is provided on the outer side of the square tube 201 on which the chain tensioning mechanism 10 is mounted. Since the mounting base 1 is embedded in the square tube 201 in this embodiment, the inspection opening 203 is provided on the other side of the square tube 201 to facilitate adjustment of the tension of the chain 6 when the laser cutting machine is surrounded by sheet metal.

[0035] To sum up, the utility model uses two pressure strips 2 to provide guidance for the front-to-back movement of the tensioning seat 3, and to limit its up-and-down movement; the tensioning screw 7 is threadedly connected to the mounting seat 1, so that the position of the tensioning seat 3 relative to the mounting seat 1 can be changed, thereby realizing the adjustment of the tension of the chain 6, and the adjustment process is simple and convenient.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first," "second," or "third" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A chain tensioning mechanism, characterized in that: It includes a mounting base for being fixed to the base frame, two pressure strips fixed to the mounting base and arranged up and down, a tensioning base slidably arranged between the two pressure strips, a first sprocket rotatably connected to the tensioning base, a second sprocket connected to the first sprocket through a chain transmission, and a tensioning screw threadedly connected to the mounting base; the tail of the tensioning screw is used to abut against the side wall of the tensioning base, and the head of the tensioning screw faces the second sprocket.

2. The chain tensioning mechanism according to claim 1, characterized in that: The mounting seat includes a mounting base whose lower surface is fixed to the base frame, and a tensioning adjustment block provided on the side wall of the mounting base; a waist-shaped hole is provided on the mounting base, and the extension direction of the waist-shaped hole is consistent with the extension direction of the chain; The tensioning seat is movably arranged in the waist-shaped hole; the tensioning adjustment block is threadedly connected with the tensioning screw.

3. The chain tensioning mechanism according to claim 2, characterized in that: A loose nut is threadedly connected to the rod body of the loosening screw, and the side wall of the loosening nut is used to abut against the side wall of the tensioning adjustment block.

4. The chain tensioning mechanism according to claim 2, characterized in that: The tensioning seat includes a tensioning base plate and a central shaft fixed to the tensioning base plate; the central shaft passes through the middle of the tensioning base plate, and the inner end of the central shaft is rotatably connected to the first sprocket; the outer end of the central shaft passes through the waist-shaped hole; the side wall of the central shaft abuts against the tail of the tensioning screw.

5. The chain tensioning mechanism according to claim 4, characterized in that: The outer end portion of the central shaft is provided with a vertical plane, and the vertical plane is used to contact the tail of the tensioning screw.

6. The chain tensioning mechanism according to claim 4, characterized in that: The cross section of the tensioning base plate is an isosceles trapezoid, and the side walls of the two pressure strips facing each other are both arranged as inclined surfaces, and the two inclined surfaces respectively abut against the upper surface or the lower surface of the tensioning base plate.

7. A chassis, characterized in that: It comprises a frame composed of a plurality of square tubes, and a chain tensioning mechanism as described in any one of claims 1 to 6; an embedding opening is provided on the inner side surface of any of the square tubes, and a mounting seat of the chain tensioning mechanism is fixed in the embedding opening.

8. The chassis according to claim 7, wherein: An inspection port is provided on the outer side surface of the square tube on which the chain tensioning mechanism is provided.

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