Belt tensioning device of cutting machine

Abstract

The utility model discloses a belt tensioning device of a cutting machine, relates to the technical field of cutting machines, and aims to solve the problem that an existing cutting machine lacks a tensioning assembly structure capable of stably controlling tensioning force. Comprising a telescopic arm, a tensioning spring, a tensioning pressure head and a tensioning knob for adjusting the length of the telescopic arm through rotation; one end of the telescopic arm is rotationally connected with the tensioning knob, the tensioning spring is arranged on the telescopic arm in a sleeving mode, the other end of the telescopic arm is fixedly connected with the tensioning pressing head, the tensioning spring abuts against the tensioning pressing head, and the tensioning knob and the tensioning pressing head are rotationally connected with the tensioning wheel and the belt wheel rotating shaft respectively. The tensioning device is simple in structure, convenient to use and capable of effectively providing stably-controlled tensioning force for the belt and preventing the belt from slipping.

Description

Technical Field

[0001] This utility model relates to the field of cutting machine technology, and in particular to a belt tensioning device for a cutting machine. Background Technology

[0002] With the continuous advancement of industrial production and processing technologies, cutting processes are increasingly widely used in numerous fields such as machinery manufacturing, construction, stone processing, and metal processing. Different cutting scenarios and materials place higher demands on cutting accuracy, efficiency, and quality, and the tension of the cutting machine blade has a significant impact on these indicators. For example, in stone cutting, improper blade tension can lead to uneven cut surfaces, affecting the processing quality of the stone. In the metal processing field, insufficient blade tension can easily cause blade displacement and vibration during the cutting process. This can not only cause dimensional deviations to exceed tolerances, leading to the scrapping of processed parts, but also accelerate tool wear due to vibration, shortening the blade's lifespan and significantly increasing production costs.

[0003] From a cutting efficiency perspective, a suitable tensioning assembly allows the blade to maintain stable high-speed operation, continuously and efficiently completing the cutting task. If tensioning issues arise, the blade's operation becomes unstable, requiring frequent parameter adjustments or even machine shutdowns for recalibration, significantly reducing the cutting volume per unit time and slowing down the overall production schedule. In modern processes that prioritize high-efficiency production, such efficiency loss is unacceptable. Furthermore, unstable blade tension can also pose safety hazards; at high speeds, a loose blade may even fly off, endangering the operator's life. Therefore, developing a cutting machine tensioning assembly structure capable of stably controlling tension is urgently needed. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a belt tensioning device for a cutting machine.

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

[0006] A belt tensioning device for a cutting machine is provided, characterized in that it includes: a telescopic arm, a tensioning spring, a tensioning pressure head, and a tensioning knob for adjusting the length of the telescopic arm by rotation;

[0007] One end of the telescopic arm is rotatably connected to the tension knob, the tension spring is fitted on the telescopic arm, the other end of the telescopic arm is fixedly connected to the tension head, the tension spring abuts against the tension head, and the tension knob and the tension head are rotatably connected to the tension wheel and the pulley shaft, respectively.

[0008] Compared with the prior art, the present invention has the following technical effects:

[0009] When the tension knob in this application is turned, it compresses the tension spring and the telescopic arm, shortening the total length of the telescopic arm. The compressed tension spring then provides a counterforce to the tension knob and the tension head. This force acts on the two pulleys, increasing the distance between them and keeping the belt taut. The aforementioned tensioning device has a simple structure, is easy to use, and effectively provides stable and controlled tension to the belt, preventing slippage. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0011] Figure 1 This is a schematic diagram of the structure of the cutting machine belt tensioning device in an embodiment of this utility model;

[0012] Figure 2 This is a cross-sectional view of the belt tensioning device for the cutting machine in an embodiment of this utility model;

[0013] Figure 3 This is a schematic diagram of the working state of the cutting machine belt tensioning device in an embodiment of this utility model.

[0014] Figure label:

[0015] 1-Tension knob, 2-Tension spring, 3-Tension arm, 4-Limit pin, 5-Tension pressure head, 6-Cylindrical pin. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] Please see Figures 1 to 3The cutting machine belt tensioning device provided in this embodiment includes: a telescopic arm, a tensioning spring 2, a tensioning pressure head 5, and a tensioning knob 1 for adjusting the length of the telescopic arm by rotating it;

[0019] One end of the telescopic arm is rotatably connected to the tension knob 1, and the tension spring 2 is fitted onto the telescopic arm. The other end of the telescopic arm is fixedly connected to the tension head 5. The tension spring 2 abuts against the tension head 5. The tension knob 1 and the tension head 5 are rotatably connected to the tension wheel and the pulley shaft, respectively.

[0020] In practice:

[0021] The tensioning device mainly consists of a tensioning knob 1, a telescopic arm, a tensioning spring 2, and a tensioning pressure head 5.

[0022] Working principle: When the tension knob 1 is turned clockwise, it pushes the tension spring 2 through the tension arm 3, applying a rightward thrust to the front end, thereby increasing the overall stroke of the tensioning device and tightening the belt, putting the blade in the working state. When the tension knob 1 is turned counterclockwise, the spring is released, eliminating the thrust to the front end, thereby reducing the overall stroke of the assembly. The belt is now in a slack state, allowing for blade disassembly or adjustment. The belt's changing state is as follows: Figure 3 As shown.

[0023] See details Figure 1 and Figure 2 The tension knob 1 has a hollow center, allowing it to rotatably connect to the shaft of the tensioning wheel or pulley. Combined with the nut on the knob, it can be manually rotated to position the entire tensioning device between the tensioning wheel and pulley, tightening the belt; conversely, turning it off loosens the belt. The end of the tensioning head 5 furthest from the tension knob 1 is an arc shape, or may be a fixed hole, engaging with the shaft of the pulley or tensioning wheel. When it is an arc shape, it abuts against the traditional tensioning wheel or pulley's built-in adjustment device (structure as shown in the image). Figure 3 (As shown in the diagram); when it is a fixed hole structure, it is rotatably connected to the shaft of the tensioning wheel or pulley.

[0024] When the cutting tool is working, the belt in the blade drive system is subjected to load and tension. By adjusting the force on the tension spring 2 through the tensioning device, the pressure of the tensioning pulley on the belt is changed, so that the blade drive system maintains appropriate tension, ensuring transmission efficiency and stability, and avoiding problems such as belt slippage.

[0025] The tension knob 1 allows for manual adjustment by the operator. It is connected to the tension spring 2 via the tension arm 3. When the tensioning device is installed, the tension spring 2 is in its initial tension or original state. The tension knob 1 transmits the tension force to the tension head 5, which applies pressure to the cutting tool to keep it taut. During the cutting process, if the tension force changes due to wear or other reasons, the tension spring 2 will automatically extend or retract to compensate for the tension change and always maintain a stable tension state for the tool.

[0026] When the tension knob 1 in this application is rotated, it compresses the tension spring 2 and the telescopic arm, shortening the total length of the telescopic arm. After compression, the tension spring 2 provides a counterforce to the tension knob 1 and the tension head 5. This force acts on the two pulleys, increasing the distance between them and keeping the belt taut. The aforementioned tensioning device has a simple structure, is easy to use, and effectively prevents belt slippage.

[0027] As one possible implementation, an adjustment block is provided on the outside of the tension knob 1, and the adjustment block is rotatably connected to the telescopic arm.

[0028] The adjustment block is designed so that the tension knob 1 can be well connected to the telescopic arm via the cylindrical pin 6, and applies pressure to the telescopic arm and tension spring 2 when the tension knob 1 is rotated.

[0029] As one possible implementation, the telescopic arm includes a tensioning arm 3 and a limiting post 4; one end of the tensioning arm 3 is rotatably connected to the adjusting block, one end of the limiting post 4 is slidably connected to the other end of the tensioning arm 3, the other end of the limiting post 4 is fixedly connected to the tensioning head 5, a fixing block is provided on the side of the tensioning arm 3 facing the tensioning knob 1, and both ends of the tensioning spring 2 abut against the fixing block and the tensioning head 5.

[0030] The limiting post 4 is slidably connected to the tensioning arm 3, which can shorten the length when the tensioning knob 1 is pressured by the adjusting block, providing space for the compression of the tensioning spring 2. The fixing block, together with the tensioning head 5, realizes the installation and fixing of the tensioning spring 2, and transmits the elastic force of the tensioning spring 2 to the tensioning wheel and the pulley, ensuring the tension of the belt.

[0031] As one possible implementation, the tensioning arm 3 is a columnar hollow structure, with the inner diameter of one end opening being smaller than the inner diameter of the other end opening. A limiting block is provided at one end of the limiting post 4 facing the tensioning arm 3, and the limiting block is located in the inner cavity of the tensioning arm 3.

[0032] The hollow tension arm 3 provides space for the relative movement between the limiting post 4 and the tension arm 3. The setting of the limiting block prevents the tension arm 3 and the limiting post 4 from separating.

[0033] As one possible implementation, the end of the tensioning arm 3 facing the tensioning knob has a transverse slit along the central axis, and the adjusting block is located inside the transverse slit.

[0034] The horizontal cut provides space for the installation of the adjustment block.

[0035] As one possible implementation, a fixing post is provided on the side of the tensioning head 5 facing the tensioning knob 1, and a mounting hole is provided in the fixing post. The other end of the telescopic arm is installed in the mounting hole, and the tensioning spring 2 is fitted on the fixing post.

[0036] The fixed post enables the installation and fixation of the tension spring 2, ensuring the stability of the spring force transmission. The other end of the limiting post that makes up the telescopic arm is installed in the mounting hole and fixed by the cylindrical pin 6, making disassembly and assembly more convenient.

[0037] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A cutting machine belt tensioner characterized by, The utility model relates to a tensioning device for a power transmission belt, which comprises: a telescopic arm, a tensioning spring, a tensioning pressure head and a tensioning knob for adjusting the length of the telescopic arm by rotation; one end of the telescopic arm is rotationally connected to the tensioning knob, the tensioning spring is sleeved on the telescopic arm, the other end of the telescopic arm is fixedly connected to the tensioning pressure head, the tensioning spring abuts against the tensioning pressure head, and the tensioning knob and the tensioning pressure head are rotationally connected to a tensioning wheel and a pulley shaft.

2. The cutting machine belt tensioner of claim 1, wherein, An adjusting block is arranged on the outside of the tensioning knob, and the adjusting block is rotationally connected to the telescopic arm.

3. The cutting machine belt tensioner of claim 2, wherein, The telescopic arm comprises a tensioning arm and a limiting column. One end of the tensioning arm is rotationally connected to the adjusting block, one end of the limiting column is slidingly connected to the other end of the tensioning arm, the other end of the limiting column is fixedly connected to the tensioning pressure head, a fixed block is arranged on the side of the tensioning arm facing the tensioning knob, and the two ends of the tensioning spring abut against the fixed block and the tensioning pressure head.

4. The cutting machine belt tensioner of claim 3, wherein, The tensioning arm is a hollow columnar structure, the inner diameter of the opening at one end of the tensioning arm is smaller than the inner diameter of the opening at the other end of the tensioning arm, a limiting block is arranged on the end of the limiting column facing the tensioning arm, and the limiting block is located in the inner cavity of the tensioning arm.

5. The cutting machine belt tensioner of claim 3, wherein, A transverse cut is arranged on the end of the tensioning arm facing the tensioning knob along the central axis, and the adjusting block is located in the transverse cut.

6. The cutting machine belt tensioner of claim 1, wherein, A fixed column is arranged on the side of the tensioning pressure head facing the tensioning knob, an installation hole is arranged in the fixed column, the other end of the telescopic arm is installed in the installation hole, and the tensioning spring is sleeved on the fixed column.

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