Synchronous belt smooth surface tensioning device

Abstract

The utility model relates to a synchronous belt smooth surface tensioning device in the field of synchronous belt adjusting devices, which comprises a tensioning wheel, a cantilever pin, a mounting bottom plate and an adjusting component, the tensioning wheel is fixed on the mounting bottom plate through the cantilever pin, and the mounting bottom plate is provided with a kidney-shaped hole for fixed mounting; the adjusting assembly is arranged at the position corresponding to the mounting bottom plate and used for pushing the mounting bottom plate to move in the direction of the kidney-shaped hole so as to achieve the tension adjusting effect of the tensioning wheel. According to the scheme, smooth surface tension adjustment of the synchronous belt and tension maintenance of the synchronous belt are achieved through the adjusting assembly and the like. The tensioning device is small in space size, stable and reliable, can achieve the purpose of tension adjustment of the synchronous belt in a narrow space and can stably and reliably maintain the effect of tension adjustment, and therefore the situation that due to the narrow space, tensioning of the synchronous belt is limited is avoided; adjustment cannot be carried out, or adjustment operation is difficult, and the later tensioning effect is difficult to maintain stably.

Description

Technical Field

[0001] The utility model relates to the technical field of tensioning a synchronous belt, in particular to a smooth surface tensioning device for a synchronous belt. Background Art

[0002] There are two main types of existing synchronous belt tensioning devices. One is a synchronous belt tooth surface tensioning device, whose tensioning wheel is a synchronous belt pulley meshing with the synchronous belt tooth profile, and the other is a synchronous belt smooth surface tensioning device, which relies on the contact between the smooth surface wheel and the back side of the synchronous belt to keep the synchronous belt at a certain tension to achieve the purpose of tensioning.

[0003] The existing smooth surface tensioning devices for synchronous belts are often designed to occupy a large space (especially in terms of height), and are difficult or impossible to be effectively applied in certain limited spaces such as SMT machines that are compact and use a large number of synchronous belts. Or there are difficulties in installation and adjustment, or inconvenience in subsequent maintenance. The application of existing smooth surface tensioning devices for synchronous belts in compact SMT machines is indeed limited to a certain extent. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems existing in the prior art and provide a synchronous belt smooth surface tensioning device, which can effectively save height space and is applicable to occasions with limited height space.

[0005] In order to achieve the above-mentioned purpose, the utility model provides, on the one hand, a synchronous belt smooth tensioning device, including a tensioning wheel, a cantilever pin, a mounting base plate and an adjustment component, wherein the tensioning wheel is fixed to the mounting base plate by a cantilever pin, and the mounting base plate is provided with a fixed waist-shaped hole; the adjustment component is arranged at a position corresponding to the mounting base plate, and is used to push the mounting base plate to move along the direction of the waist-shaped hole to realize the function of the tensioning wheel to adjust the tension.

[0006] Preferably, a step for installing and positioning the tensioning wheel is provided at the lower end of the cantilever pin, which is used to locate the position of the tensioning wheel relative to the cantilever pin.

[0007] Preferably, the cantilever pin is provided at a position below the tensioning wheel positioning step as a threaded structure for threaded connection with the mounting base plate.

[0008] Preferably, a clamping groove is provided at the upper end of the cantilever pin, and an E-type clamping spring is provided in the clamping groove for clamping and fixing the upper end of the tensioning wheel.

[0009] Preferably, the cantilever pin is provided with a planar structure above the slot, for applying force with a wrench to install the cantilever pin onto the mounting base plate.

[0010] Preferably, the interior of the tension wheel is configured as a hollow structure, and bearings are provided at the upper and lower ends of the interior of the tension wheel for rotationally connecting with the cantilever pin.

[0011] Preferably, an adjustment push block is provided at one end of the mounting base plate, and the adjustment component is arranged corresponding to the position of the adjustment push block. The adjustment component includes an L-shaped part and an adjustment screw. The adjustment screw passes through the L-shaped part and is rotatably connected to the threaded hole on the L-shaped part. The mounting base plate is pushed to move along the direction of the waist-shaped hole by rotating the adjustment screw.

[0012] Preferably, the mounting base plate is a 45# material plate processed by milling, the cantilever pin is a 45# material pin processed by milling, the L-shaped part is a Q235 material sheet metal part, and the tension wheel is a 304 stainless steel wheel.

[0013] Through the above technical solution, the tensioning wheel is installed on the cantilever pin, the cantilever pin is installed on the cantilever pin mounting base, and the tensioning device is optimized in the height direction, which can not only meet the stable tensioning requirements, but also save space in the height direction of the tensioning device. It can be suitable for tensioning synchronous belts with compact space in the height direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the smooth surface tensioning device of the synchronous belt;

[0015] Figure 2 It is a schematic diagram of the partial structure of the synchronous belt smooth surface tensioning device.

[0016] In the figure, 1. tensioning wheel; 2. cantilever pin; 3. mounting base plate; 4. waist-shaped hole; 5. adjusting push block; 6. L-shaped part; 7. adjusting screw; 8. bearing; 9. tensioning wheel positioning step; 10. E-type retaining spring. DETAILED DESCRIPTION

[0017] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below", "to the left" or "to the right" of a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. Example

[0018] A timing belt smooth surface tensioning device, such as Figure 1As shown, it includes a tensioning wheel 1, a cantilever pin 2, a mounting base plate 3 and an adjusting component. The tensioning wheel 1 is fixed to the mounting base plate 3 through the cantilever pin 2, and the mounting base plate 3 is provided with a fixed waist-shaped hole 4; the adjusting component is arranged at a position corresponding to the mounting base plate 3, and is used to push the mounting base plate 3 to move along the direction of the waist-shaped hole 4 to realize the function of adjusting the tension of the tensioning wheel 1.

[0019] Considering the high integration, numerous components arranged in space and a large number of synchronous belts for transmission, such as the placement machine, there is also a need to tension the synchronous belt. This application installs the tensioning wheel 1 on the cantilever pin 2, the cantilever pin 2 is installed on the cantilever pin mounting plate, and the tensioning device is optimized in the height direction. It can not only meet the stable tensioning requirements, but also save space in the height direction of the tensioning device, and can be used for tensioning occasions of synchronous belts with compact height space. It has the advantages of simple structure, easy installation and adjustment, stable and reliable tensioning effect, and relatively small space occupation (the tensioning device saves space in the height direction, and the length and width directions can be appropriately changed according to the specific working environment to meet the application requirements). It can better meet the various places with limited space on the placement machine and the industrial application requirements of smooth and stable tensioning of the synchronous belt.

[0020] Existing tensioning devices often require complex structures to meet the requirements of stable and reliable functions, which undoubtedly increases the manual operation time. In addition, the tensioning wheel 1 of some tensioning devices is fixed on the sheet metal, and the synchronous belt often deviates on the tensioning wheel 1 due to the insufficient processing accuracy of the sheet metal. For example, in the type of tooth surface tensioning, serious deviation of the synchronous belt will cause significant wear on the side of the synchronous belt, and even unidirectional continuous deviation, which will seriously wear the edge of one side of the synchronous belt, causing the life of the synchronous belt to be seriously reduced. The smooth wheel of the smooth tensioning of the synchronous belt will also cause the part of the synchronous belt in contact with the tensioning wheel 1 to deviate unidirectionally or reciprocately due to the insufficient processing accuracy of the sheet metal, which will directly cause the synchronous belt to detach from the smooth wheel of the synchronous belt tensioning device. If the above-mentioned synchronous belt tensioning device that relies on sheet metal to fix the tensioning wheel 1 is to be used better, it is often necessary to manually adjust the appropriate installation angle repeatedly and tediously by means of copper foil padding, etc., so as to avoid unidirectional deviation or significant reciprocating deviation of the synchronous belt. This undoubtedly increases the difficulty of the assembly work of the assemblers, and is limited by the technical differences of the assemblers. It is difficult to achieve a uniform effect on the degree of influence of the final tensioning device on the deviation of the synchronous belt.

[0021] Furthermore, in the embodiment of the present application, a tensioning wheel positioning step 9 is provided at the lower end of the cantilever pin 2, which is used to position the tensioning wheel 1 relative to the cantilever pin 2; the portion of the cantilever pin 2 located below the tensioning wheel positioning step 9 is provided with a threaded structure, which is used to be threadedly connected to the mounting base plate 3; a clamping groove is provided at the upper end of the cantilever pin 2, and an E-type retaining spring 10 is provided in the clamping groove, which is used to clamp and fix the upper end of the tensioning wheel 1; the cantilever pin 2 is provided with a planar structure above the clamping groove, which is used to apply force with a wrench to install the cantilever pin 2 on the mounting base plate 3; the interior of the tensioning wheel 1 is provided with a cavity structure, and bearings 8 are provided at the upper and lower ends of the interior of the tensioning wheel 1, which are used to be rotatably connected to the cantilever pin 2; one end of the mounting base plate 3 An adjusting push block 5 is provided, and the adjusting component is arranged corresponding to the position of the adjusting push block 5. The adjusting component includes an L-shaped part 6 and an adjusting screw 7. The adjusting screw 7 passes through the L-shaped part 6 and is rotatably connected to the L-shaped part 6. The adjusting screw 7 is rotated to push the adjusting push block 5 to move along the waist-shaped hole 4; the mounting base plate 3 is a milled 45# material plate, the cantilever pin 2 is a milled 45# material pin, the L-shaped part 6 is a Q235 material sheet metal part, and the tensioning wheel 1 is a 304 stainless steel wheel (the advantage is that no additional surface anti-rust treatment is required to meet the effect of not easy to rust, and the hardness meets the wear-resistant requirements of the synchronous belt tensioning wheel 1).

[0022] This application mainly considers the condition of limited height space, and cleverly fixes the cantilever pin 2 on the CNC-processed base plate with a simple and reliable structure, and arranges the curved drum tensioning wheel 1 on the cantilever pin 2. In addition to meeting the installation requirements of the drum tensioning wheel 1 and the E-type retaining ring 10 (there is a retaining ring installation groove for the E-type retaining ring 10 on the cantilever pin 2, and the width of the retaining ring installation groove is designed according to the thickness gap of the retaining ring), the length of the cantilever pin 2 only leaves a small amount of length as a wrench position, which is convenient for applying a wrench to tightly install the cantilever pin 2 on the CNC base plate with precision flatness requirements (facilitating installation in place, and using the installation positioning shoulder of the drum tensioning wheel 1 of the cantilever pin 2 to ensure the vertical installation accuracy of the cantilever pin 2 and the cantilever pin installation base plate 3). Furthermore, the vertical relationship between the cantilever pin 2 and the installation base plate 3 (CNC processing) can be ensured by processing accuracy, avoiding the cumbersome adjustment of copper foil pads and other measures when the cantilever pin 2 is installed on the sheet metal. Secondly, the tension wheel 1 adopts a drum tension wheel 1 with an arc, and two bearings 8 are pressed into the two sides of the tension wheel 1. The middle area of ​​the tension wheel 1 is a cavity, which avoids the problems of the thickness and bulkiness of the tension wheel 1, and also avoids the life of the bearing 8 being affected by the additional load. Secondly, in the process of adjusting the tension of the synchronous belt by the tension wheel 1 to achieve the target belt tension, a bent L-shaped sheet metal is provided behind the suspension pin mounting plate, and two screws are installed on the L-shaped sheet metal. The tension of the synchronous belt can be adjusted steplessly by adjusting the screws until the target tension of the synchronous belt is achieved, and then the adjustment position of the adjustment screw 7 is maintained by structures such as flat washers, spring washers, and nuts, and the cantilever pin mounting base plate 3 is fixed. The tension wheel 1 is a drum tension wheel 1 with an arc, which can play a self-correcting function for the smooth tensioning of the synchronous belt. The adjusting screw 7 is installed on the L-shaped sheet metal, which can realize stepless adjustment of the synchronous belt tension, saving labor and being efficient. The adjustment position of the adjusting screw 7 is maintained by structures such as flat washers, spring washers, and nuts, and the cantilever pin is then fixed to the base plate 3, so that the tensioning effect is stable and reliable.

[0023] The installation method of the synchronous belt smooth tensioning device of the present application is as follows: 1. First, tighten the L-shaped sheet metal with fixing screws according to the standard torque to fix the L-shaped sheet metal to the installation plane; 2. With the help of the four screws on the mounting base plate 3, the mounting base plate 3 is contacted with the mounting plane, but without applying too much torque to the screws, the cantilever pin mounting base plate 3 can move tangentially relative to the mounting plane; 3. By adjusting the screw 7 and with the help of the tensioning force, the mounting base plate 3 is moved to the appropriate position to meet the standard adjustment range of the belt tension, and the adjusting screw 7 is locked with the help of the nut; 4. Fix the four screws on the mounting base plate 3 according to the standard torque, then all the above-mentioned screws are finally fixed, and the synchronous belt tensioning force reaches a better stable state.

[0024] In summary, the technical solution of the present application has the following beneficial effects: it can be operated in a space with limited height space; the process of adjusting the tension of the synchronous belt is simple; the effect after adjusting the tension of the synchronous belt is stable and reliable. The entire synchronous belt smooth tensioning device is mainly used to save height space and is applied to occasions with limited height space, and its length and width dimensions can also be reasonably changed according to the limitations of the specific application environment to achieve applicability.

[0025] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0026] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A synchronous belt smooth surface tensioning device, characterized in that: It includes a tensioning wheel, a cantilever pin, a mounting base plate and an adjusting component. The tensioning wheel is fixed to the mounting base plate through the cantilever pin, and the mounting base plate is provided with a waist-shaped hole for fixed installation; the adjusting component is arranged at a position corresponding to the mounting base plate, and is used to push the mounting base plate to move along the direction of the waist-shaped hole to realize the function of the tensioning wheel to adjust the tension.

2. The synchronous belt smooth surface tensioning device according to claim 1, characterized in that: A step for installing and positioning the tension wheel is provided at the lower end of the cantilever pin, which is used to locate the position of the tension wheel relative to the cantilever pin.

3. The synchronous belt smooth surface tensioning device according to claim 2, characterized in that: The cantilever pin is located below the tensioning wheel positioning step and is configured as a threaded structure for threaded connection with the mounting base plate.

4. The synchronous belt smooth surface tensioning device according to claim 2, characterized in that: A clamping groove is provided at the upper end of the cantilever pin, and an E-type clamping spring is provided in the clamping groove for clamping and fixing the upper end of the tensioning wheel.

5. The synchronous belt smooth surface tensioning device according to claim 4, characterized in that: The cantilever pin is provided with a plane structure above the clamping slot, which is used for applying force with a wrench to install the cantilever pin on the installation base plate.

6. The synchronous belt smooth surface tensioning device according to claim 1, characterized in that: The interior of the tension wheel is set as a cavity structure, and bearings are arranged at the upper and lower ends of the tension wheel for rotationally connecting with the cantilever pin.

7. The timing belt smooth surface tensioning device according to any one of claims 1 to 6, characterized in that: An adjustment push block is provided at one end of the mounting base, and the adjustment component is arranged corresponding to the position of the adjustment push block. The adjustment component includes an L-shaped part and an adjustment screw. The adjustment screw passes through the L-shaped part and is rotatably connected to the threaded hole on the L-shaped part. The mounting base is pushed to move along the waist-shaped hole direction by rotating the adjustment screw.

8. The synchronous belt smooth surface tensioning device according to claim 7, characterized in that: The mounting base plate is a 45# material plate processed by milling, the cantilever pin is a 45# material pin processed by milling, the L-shaped part is a Q235 material sheet metal part, and the tension wheel is a 304 stainless steel wheel.

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