Expanding device for mounting chain of roller bed machine

Abstract

The expansion device comprises two stress plates which are arranged in parallel and located on the inner sides of rollers connected with the two ends of the chain needing to be expanded respectively, installation plates are fixed to the inner side walls of the stress plates, and a length adjustable device is installed between the two installation plates. And a bidirectional ratchet mechanism with a handle is arranged on the length-adjustable device, and the length of the length-adjustable device is adjusted under the condition that the handle drives the bidirectional ratchet mechanism to rotate clockwise or anticlockwise, so that the distance between the two rollers is adjusted. The length of the length-adjustable device is adjusted under the condition that the handle drives the bidirectional ratchet mechanism to rotate clockwise or anticlockwise, the distance between the two rollers is adjusted, the problem that the chain is difficult to replace is solved, the structure is simple, carrying is easy, time and labor are saved during chain installation, the rollers are convenient to take out after being installed and fixed, and use is convenient. And one maintainer can complete the replacement of the wedge belt of the roller, so that the labor intensity and the labor cost are greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of chain replacement accessories, and particularly relates to an expansion device for installing a chain of a roller table machine. Background Art

[0002] The rotation of the rollers of the roller table machine is realized by connecting a chain to drive two rollers. In the case of chain damage, roller injury, etc., there are generally two ways to tighten the chain: ① Adopt the method of first tightening the chain and then installing the roller. Due to insufficient stretching amount of the chain, the installation usually cannot be completed; ② Adopt the method of installing the roller first and then installing the chain. However, since the roller is already fixed, under the action of the chain tension, multiple people are required to push and pull the roller forcefully, and the installation difficulty is large and the operation efficiency is low. Therefore, in view of the above problems, it is necessary to make improvements. Summary of the Utility Model

[0003] The technical problem solved by the utility model: Provide an expansion device for installing a chain of a roller table machine. By setting a length-adjustable device with a two-way ratchet mechanism on the mounting plate inside the force-bearing plates arranged in parallel and adapted to the corresponding side rollers, and adjusting the length of the length-adjustable device by rotating the two-way ratchet mechanism clockwise or counterclockwise driven by a handle, the distance between the two rollers is adjusted, solving the problem of difficult chain replacement. The structure is simple, easy to carry, time-saving and labor-saving for installing the chain, and it is convenient to take out after the roller is installed and fixed. A single maintenance worker can complete the replacement of the roller wedge belt, greatly reducing the labor intensity and labor cost, and having high use value.

[0004] The technical solution adopted by the utility model: An expansion device for installing a chain of a roller table machine includes two force-bearing plates arranged in parallel and respectively located inside the rollers connected to both ends of the chain to be expanded. A mounting plate is fixed on the inner side wall of the force-bearing plates. A length-adjustable device is installed between the two mounting plates, and a two-way ratchet mechanism with a handle is provided on the length-adjustable device. By rotating the two-way ratchet mechanism clockwise or counterclockwise driven by the handle, the length of the length-adjustable device is adjusted to realize the adjustment of the distance between the two rollers.

[0005] Wherein, the force-bearing plate adopts a wavy structure. The arc surface of the middle part of the force-bearing plate facing the roller side is adapted to and fits with the same-side roller, and the middle part of the outer wall of the force-bearing plate on the side opposite to the roller is adapted to and connected with the corresponding end of the length-adjustable device.

[0006] Furthermore, the length-adjustable device includes a fixed sleeve and a screw rod located between the two force-bearing plates. One end of the fixed sleeve is fixed in the middle of one of the mounting plates, and the screw rod threadedly connected with the fixed sleeve is rotatably installed in the middle of the other mounting plate. The two-way ratchet mechanism is adapted to and connected with the screw rod, and the rotation of the two-way ratchet mechanism is controlled clockwise or counterclockwise by the handle to realize the adjustment of the distance between the two force-bearing plates.

[0007] Further, the ratchet wheel in the bidirectional ratchet mechanism is fixedly connected to the screw.

[0008] Further, connecting columns fixedly connected to the force-receiving plates on the same side are provided on the outer side walls at the upper and lower ends of the mounting plate.

[0009] Further, a scale is fixed on the side wall of one of the mounting plates, and the indicating rod fixed on the other mounting plate points to the scale on the scale.

[0010] Further, the indicating rod is in an L-shaped rod structure with a horizontal rod length not greater than the minimum inner distance between the two mounting plates. The end of the horizontal rod of the indicating rod is fixed on the side wall of the other mounting plate, and the end of the vertical rod of the indicating rod points to the scale on the scale.

[0011] Advantages of the present utility model compared with the prior art:

[0012] 1. In this technical solution, a length-adjustable device with a bidirectional ratchet mechanism is installed on the mounting plate inside the force-receiving plates arranged in parallel and adapted to the corresponding side rollers. The length of the length-adjustable device is adjusted by rotating the bidirectional ratchet mechanism clockwise or counterclockwise driven by the handle, so as to adjust the distance between the two rollers, solve the problem of difficult chain replacement, reduce the difficulty of chain replacement, and ensure the chain stretching amount.

[0013] 2. In this technical solution, the force-receiving plate adopts a wavy structure. While being reliably adapted to the roller, it is convenient for the handle to control the bidirectional ratchet mechanism and provides the required operating space for the handle.

[0014] 3. This technical solution has a simple structure, is easy to carry, saves time and effort in installing the chain, and is convenient to take out after the roller is installed and fixed. A single maintenance worker can complete the replacement of the roller wedge belt, greatly reducing the labor intensity and labor cost, and having high use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a front view of the present utility model;

[0017] Figure 3 is a partial structural schematic diagram of the present utility model showing the position of the indicating rod and the scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will combine the embodiments in the present utility model Figures 1-3, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] It should be noted that in this article, unless otherwise stated, it should be understood that: the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation. The element defined by the statement "including one..." does not exclude the existence of other identical elements in the process, method, article or device including the said element.

[0021] An expansion device for the installation of the roller path machine chain, such as Figures 1-3 shown, includes two force plates 1 that are arranged in parallel and are respectively located inside the rollers connected to both ends of the chain to be expanded. An installation plate 2 is fixed on the inner side wall of the force plate 1. A length adjustable device is installed between the two installation plates 2, and a bidirectional ratchet mechanism 5 with a handle 4 is provided on the length adjustable device. The length of the length adjustable device is adjusted by driving the bidirectional ratchet mechanism 5 to rotate clockwise or counterclockwise by the handle 4, so as to adjust the distance between the two rollers; in the above structure, by setting a length adjustable device with a bidirectional ratchet mechanism 5 on the installation plate 2 inside the two force plates 1 that are arranged in parallel and adapted to the corresponding side rollers, and adjusting the length of the length adjustable device by driving the bidirectional ratchet mechanism 5 to rotate clockwise or counterclockwise by the handle 4, the distance between the two rollers is adjusted, solving the problem of difficult chain replacement, reducing the difficulty of chain replacement, and ensuring the chain stretching amount;

[0022] such as Figures 1-2As shown in the figure, the specific structure of the force-bearing plate 1 is as follows: The force-bearing plate 1 adopts a wavy structure. The arc surface of the middle part of the force-bearing plate 1 facing the roller side fits and adheres to the roller on the same side, and the middle part of the outer wall of the force-bearing plate 1 on the side opposite to the roller is adaptively connected to the corresponding end of the length adjustable device. In the above structure, the distance between the middle parts of the two parallel force-bearing plates 1 is smaller than the distance between the two ends. The two mounting plates 2, the length adjustable device, and the bidirectional ratchet mechanism 5 are all arranged between the middle parts of the two force-bearing plates 1. The roller is located at the middle position on the outer side of the force-bearing plate 1 and contacts the outer arc surface of the middle part of the force-bearing plate 1 during use. The distance between the two ends of the two force-bearing plates 1 is larger, providing the required operating space for the operation of the operating handle 4.

[0023] As Figures 1-2 shown in the figure, the specific structure of the length adjustable device is as follows: The length adjustable device includes a fixed sleeve 3 and a screw rod located between the two force-bearing plates 1. One end of the fixed sleeve 3 is fixed to the middle part of one of the mounting plates 2, and the screw rod threadedly connected to the fixed sleeve 3 is rotatably installed in the middle part of the other mounting plate 2. The bidirectional ratchet mechanism 5 is adaptively connected to the screw rod, and by rotating the bidirectional ratchet mechanism 5 clockwise or counterclockwise through the handle 4, the distance between the two force-bearing plates 1 can be adjusted. Specifically, the ratchet in the bidirectional ratchet mechanism 5 is fixedly connected to the screw rod. Alternatively, a hexagon can be fixed at the rotatable connection end of the screw rod so that the hexagon hole of the ratchet fits and connects with the hexagon on the screw rod. In the above structure, the central hole of the fixed sleeve 3 is a threaded hole, and the screw rod rotatably installed in the middle part of the other mounting plate 2 is adaptively connected to the threaded hole of the fixed sleeve 3. During the process of the bidirectional ratchet mechanism 5 controlling the rotation of the screw rod, the distance between the two mounting plates 2 is adjusted, so that the distance between the rollers connected to the two ends of the chain to be expanded by the two force-bearing plates 1 is increased to the original installation distance. At this time, the screw holes are aligned, and the roller fixing screws can be installed. After the installation is completed, by adjusting the position of the lever adapted to the ratchet through the button of the bidirectional ratchet mechanism 5, the rotation direction of the ratchet is reversed. Then, after driving the ratchet to rotate reversely through the handle 4, the distance between the two force-bearing plates 1 is reduced and separated from the roller, realizing the removal of the expansion device after it is separated from the roller. The bidirectional ratchet mechanism 5 is an existing structure, the same as the bidirectional ratchet mechanism used in a ratchet wrench. Therefore, it will not be elaborated here.

[0024] Among them, the fixing structure of the mounting plate 2 and the force-bearing plate 1 is specifically as follows: On the premise that the middle part of the mounting plate 2 is fixed to the middle part of the outer wall of the force-bearing plate 1, connection columns 6 for fixedly connecting to the force-bearing plate 1 on the same side are provided on the outer side walls of the upper and lower ends of the mounting plate 2, ensuring reliable fixation of the mounting plate 2 while making the fixing heights at both ends of the mounting plate 2 consistent and ensuring that the mounting plate 2 is parallel and not inclined.

[0025] As Figure 3As shown, in order to quickly master the adjustment dimension of the distance between the two mounting plates 2, a scale 7 is fixedly arranged on the side wall of one of the mounting plates 2, and an indicating rod 8 fixed on the other mounting plate 2 points to the scale 7; specifically, the indicating rod 8 is an L-shaped rod structure with a horizontal rod length not greater than the minimum inner distance between the two mounting plates 2. The end of the horizontal rod of the indicating rod 8 is fixedly arranged on the side wall of the other mounting plate 2, and the end of the vertical rod of the indicating rod 8 points to the scale on the scale 7; when the two mounting plates 2 move outwards or inwards, the scale 7 and the indicating rod 8 move along with the two mounting plates 2 respectively, smoothly converting the change of the distance between the two mounting plates 2 into the change of the relative positions of the scale 7 and the indicating rod 8, and being reflected on the scale line of the scale 7, so as to quickly determine the change amount of the distance between the two mounting plates 2.

[0026] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An expansion device for roller conveyor chain installation, characterized in that: It comprises two parallel force-bearing plates (1) respectively located on the inner side of rollers connected to the two ends of the chain to be expanded, a mounting plate (2) is fixed on the inner side wall of the force-bearing plate (1), a length-adjustable device is installed between the two mounting plates (2), and a bidirectional ratchet mechanism (5) with a handle (4) is provided on the length-adjustable device, and the length of the length-adjustable device is adjusted when the handle (4) drives the bidirectional ratchet mechanism (5) to rotate clockwise or counterclockwise, thereby adjusting the distance between the two rollers; A scale (7) is fixed on the side wall of one of the mounting plates (2), and an indicator rod (8) fixed on the other mounting plate (2) points to the scale (7).

2. The expansion device for roller conveyor chain installation according to claim 1, characterized in that: The force-bearing plate (1) adopts a wavy structure, and the arc surface of the middle part of the force-bearing plate (1) facing the roller side is adapted to fit the roller on the same side, and is adapted to be connected to the middle part of the outer wall of the force-bearing plate (1) on the opposite side of the roller and the corresponding end of the length-adjustable device.

3. The expansion device for roller conveyor chain installation according to claim 1, characterized in that: The length-adjustable device comprises a fixing sleeve (3) and a screw rod located between two force-bearing plates (1); one end of the fixing sleeve (3) is fixed to the middle of one of the mounting plates (2); the screw rod threadedly connected to the fixing sleeve (3) is rotatably mounted to the middle of the other mounting plate (2); the bidirectional ratchet mechanism (5) is adaptively connected to the screw rod, and the bidirectional ratchet mechanism (5) is controlled to rotate clockwise or counterclockwise by a handle (4) to achieve adjustment of the distance between the two force-bearing plates (1).

4. The expansion device for roller conveyor chain installation according to claim 1, characterized in that: The ratchet in the bidirectional ratchet mechanism (5) is fixedly connected to the screw rod.

5. The expansion device for roller conveyor chain installation according to any one of claims 1 to 4, characterized in that: The outer side walls at both ends of the mounting plate (2) are provided with connection columns (6) fixedly connected to the load-bearing plate (1) on the same side.

6. The expansion device for roller conveyor chain installation according to claim 5, characterized in that: The indicating rod (8) is an L-shaped rod structure with a horizontal rod length not greater than the minimum inner spacing between the two mounting plates (2); the horizontal rod end of the indicating rod (8) is fixed to the side wall of the other mounting plate (2), and the vertical rod end of the indicating rod (8) points to the scale on the scale (7).

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