High-precision belt tensioning tool

Abstract

The utility model discloses a high-precision belt tensioning tool, relates to the technical field of tools, and aims to provide a belt tensioning tool which is high in measurement precision and simple to operate. The high-precision belt tensioning tool comprises an installation plate, a hollow stud is movably arranged on the installation plate, the outer surface of the hollow stud is matched with a threaded hole in the installation plate, a digital display pressure rod is installed in the hollow stud in a penetrating mode, and the head of the digital display pressure rod stretches into a four-axis structure to make contact with a belt. The head of the digital display pressure rod is provided with a pressure sensor. According to the utility model, the tension of the belt is measured by using the digital display pressure rod, which is different from the measurement by using a digital display torque wrench in the prior art, so that the influence caused by thread friction torque can be reduced, and the measurement precision and the shipment quality of products are improved.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and in particular to a high-precision belt tensioning tool. Background Technology

[0002] A robot is an automated device capable of sensing its environment, processing information, and performing actions. It can assist or replace humans in completing various tasks. Common small-load six-axis robotic arms, due to their small load capacity, require a compact design to adapt to factory environments, especially for four-axis robots.

[0003] The four-axis motor and the reducer need to be offset connected. The connection method can be either a synchronous belt connection or a gear connection. When using a synchronous belt connection, due to the compact structure and small internal space, it is inconvenient for workers to operate when installing the synchronous belt, and it is impossible to detect the tension of the synchronous belt by using a frequency meter.

[0004] Existing technologies include measuring tension by installing a belt tensioning fixture. This involves using a round-headed nut to contact the belt and then connecting it to a digital torque wrench to measure the tension. However, when measuring with a digital torque wrench, the fixture needs to be connected by one or more sets of threads. The frictional torque generated during the connection process can affect the measurement results, leading to insufficient accuracy of the measurement data. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a high-precision belt tensioning fixture with high measurement accuracy and simple operation.

[0006] This utility model relates to a high-precision belt tensioning fixture, which includes a mounting plate. A hollow stud is movably mounted on the mounting plate. The outer surface of the hollow stud mates with a threaded hole on the mounting plate. A digital pressure rod is installed through the hollow stud. The head of the digital pressure rod extends into the four-axis structure and contacts the belt. A pressure sensor is installed on the head of the digital pressure rod.

[0007] This utility model relates to a high-precision belt tensioning fixture, wherein the hollow stud and the digital display pressure rod are in clearance fit.

[0008] This utility model relates to a high-precision belt tensioning fixture, wherein the digital display pressure rod is provided with two shaft shoulders, and the hollow stud is located between the two shaft shoulders.

[0009] This utility model relates to a high-precision belt tensioning fixture, wherein the inner surface of the hollow stud and the outer surface of the digital pressure rod are coated with a wear-resistant material.

[0010] This utility model relates to a high-precision belt tensioning fixture, wherein a bearing is installed between the inner surface of the hollow stud and the outer surface of the digital display pressure rod.

[0011] The present invention relates to a high-precision belt tensioning fixture, wherein the head of the digital display pressure rod is round.

[0012] This utility model relates to a high-precision belt tensioning fixture, wherein the mounting plate is installed on the right side of the large arm of a four-axis robot structure by screws.

[0013] This utility model relates to a high-precision belt tensioning fixture, wherein the mounting plate is provided with an observation window.

[0014] The difference between this high-precision belt tensioning fixture and existing technologies lies in that it directly reads the pressure value by rotating a hollow stud to move a digital pressure rod down the belt a certain distance. Since the self-locking effect of the threads between the hollow stud and the mounting plate has no effect on the value on the digital pressure rod, there is no need to slightly rotate the hollow stud at the end to record the pressure value, making the structure and operation simpler. Furthermore, this fixture uses a digital pressure rod to measure belt tension, unlike existing technologies that use digital torque wrenches. This reduces the influence of thread friction torque, improving measurement accuracy and product quality.

[0015] The high-precision belt tensioning fixture of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection between the high-precision belt tensioning fixture of this utility model and the four-axis structure of the robot;

[0017] Figure 2 This is a front view of the connection between the high-precision belt tensioning fixture of this utility model and the four-axis structure of the robot;

[0018] Figure 3 for Figure 2 Sectional view along the DD direction;

[0019] The markings in the diagram are as follows: 1-Mounting plate; 2-Hollow stud; 3-Digital pressure rod. Detailed Implementation

[0020] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] Example

[0022] like Figures 1-3 As shown, this utility model's high-precision belt tensioning fixture includes a mounting plate 1, which is fixedly mounted on the right side of the arm of a four-axis robot structure using screws. An adjustable belt, specifically a synchronous belt, is installed inside the four-axis robot structure. An observation window is provided on the mounting plate 1 to facilitate observation of the tensioning fixture's working status by the operator.

[0023] A hollow stud 2 is mounted on the mounting plate 1. The outer surface of the hollow stud 2 mates with the threaded hole on the mounting plate 1, extending through the mounting plate 1 and into the interior of the four-axis structure. A digital pressure rod 3 is installed through the hollow stud 2, with a clearance fit between the hollow stud 2 and the digital pressure rod 3. The digital pressure rod 3 has two shoulders, and the hollow stud 2 is located between the two shoulders, which restrict the relative axial movement between them.

[0024] A high-polymer wear-resistant material is coated between the inner surface of the hollow stud 2 and the outer surface of the digital pressure rod 3 to reduce friction between them. In other embodiments, a bearing may also be installed between the hollow stud 2 and the digital pressure rod 3 to reduce friction.

[0025] The head of the digital pressure lever 3 extends into the quadcopter structure and contacts the synchronous belt. The head of the digital pressure lever 3 is round and is equipped with a pressure sensor.

[0026] The high-precision belt tensioning fixture of this invention performs the following steps when detecting belt tension:

[0027] 1. Rotate the hollow stud 2 until the digital pressure rod 3 contacts the belt, and mark the angular position of the hollow stud 2 or the digital pressure rod 3;

[0028] 2. Continue rotating the hollow stud 2 a certain number of turns, causing the digital pressure rod 3 to move forward and press down on the belt a certain distance 'a'. The distance 'a' can be calculated from the number of rotations of the hollow stud 2 and the pitch of the hollow stud 2. Record the value on the digital pressure rod 3 at this time. If the value on the digital pressure rod is within the specified value range 'b' after the tension test is completed, the belt tension adjustment is qualified. If it is not within the specified value range 'b', the position of the motor flange needs to be adjusted, the belt length needs to be changed, and the belt tension test steps need to be repeated until the value on the digital pressure rod 3 is within the specified value range 'b'.

[0029] 3. Then tighten the motor flange fixing screws that can adjust the belt position, and repeat the belt tension test steps to ensure that the belt tension is still within the qualified range after the motor flange fixing screws are tightened.

[0030] The distance 'a' and the numerical range 'b' can be determined based on the robot's structure.

[0031] This utility model relates to a high-precision belt tensioning fixture. By rotating a hollow stud, a digital pressure rod is moved and pressed down on the belt a certain distance, and the pressure value is directly read. Since the self-locking phenomenon of the thread between the hollow stud and the mounting plate has no effect on the value on the digital pressure rod, there is no need to slightly rotate the hollow stud at the end to record the pressure value. The structure and operation are relatively simple. This utility model uses a digital pressure rod to measure the belt tension, which is different from the existing technology that uses a digital torque wrench. This can reduce the influence of thread friction torque, improve measurement accuracy and product quality.

[0032] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A high-precision belt tensioning fixture, characterized in that: It includes a mounting plate with a hollow stud. The outer surface of the hollow stud mates with a threaded hole on the mounting plate. A digital pressure rod is installed through the hollow stud. The head of the digital pressure rod extends into the four-axis structure and contacts the belt. A pressure sensor is installed at the head of the digital pressure rod.

2. The high-precision belt tensioning fixture according to claim 1, characterized in that: The hollow stud and the digital pressure rod are fitted with a clearance.

3. The high-precision belt tensioning fixture according to claim 1, characterized in that: The digital pressure rod has two shoulders, and a hollow stud is located between the two shoulders.

4. The high-precision belt tensioning fixture according to claim 1, characterized in that: A wear-resistant material is applied between the inner surface of the hollow stud and the outer surface of the digital pressure rod.

5. The high-precision belt tensioning fixture according to claim 1, characterized in that: A bearing is installed between the inner surface of the hollow stud and the outer surface of the digital pressure rod.

6. The high-precision belt tensioning fixture according to claim 1, characterized in that: The head of the digital pressure bar is round.

7. The high-precision belt tensioning fixture according to claim 1, characterized in that: The mounting plate is installed on the right side of the robot's four-axis arm using screws.

8. The high-precision belt tensioning fixture according to claim 1, characterized in that: An observation window is provided on the mounting plate.

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