Ball screw friction torque measuring device

Abstract

The utility model belongs to the field of torque measurement, and particularly relates to a ball screw friction torque measuring device which comprises a base assembly, a fixing plate and a measuring assembly. A sliding groove is formed in the top of a base of the base assembly, and four mounting blocks distributed in a rectangular shape are arranged on the outer surface. A motor and an electric push rod are installed on the fixing plate. The motor transmits power through a coupler. The measuring assembly comprises a connecting block, a first clamping plate, a second clamping plate and a long bolt, the first clamping plate and the second clamping plate are embedded into the first torque sensor and the second torque sensor respectively, the bottom of the connecting block is in sliding fit with the sliding groove, and the output end of the electric push rod is fixedly connected with the connecting block. The electric push rod drives the measuring assembly to move on the sliding groove, clamping and position adjusting of the ball screws of different specifications are achieved, the double torque sensors are used for synchronously collecting friction torque data, and the measuring efficiency and reliability of the friction torque of the ball screws can be effectively improved.

Description

A ball screw friction torque measuring device Technical Field

[0001] This utility model relates to the field of torque measurement, specifically a ball screw friction torque measuring device. Background Technology

[0002] In the field of mechanical transmission, ball screws, as precision transmission components that convert rotary motion into linear motion, have frictional torque as one of the key parameters for evaluating product performance. The magnitude of frictional torque directly affects the transmission efficiency, motion accuracy, and service life of the equipment, thus requiring precise measurement.

[0003] In existing technologies, the measuring devices for ball screw friction torque typically have the following shortcomings:

[0004] Complex operation: Some devices require manual adjustment of clamping force or manual recording of data, which is not only time-consuming and labor-intensive, but also prone to human error, and cannot meet the rapid testing needs in automated production.

[0005] Poor adaptability: For ball screws of different specifications (such as length and diameter), traditional devices often require the replacement of special fixtures or structural adjustments, which is not versatile and increases measurement costs and time costs. Therefore, a ball screw friction torque measuring device is proposed to address the above problems. Summary of the Invention

[0006] To overcome the problems of poor adaptability and complex operation of existing technologies, this utility model proposes a ball screw friction torque measuring device.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a ball screw friction torque measuring device, a base assembly, the base assembly including a base, and a sliding groove is provided on the top of the base.

[0008] A fixed plate is provided, on the top surface of which a motor is mounted. A coupling is installed at the output end of the motor. An electric push rod is mounted on one side surface of the fixed plate.

[0009] The measuring component includes a connecting block and a long bolt. A first clamping plate is fixedly connected to the top of the connecting block. A first torque sensor is embedded in the top of the first clamping plate. A second clamping plate is sleeved on the long bolt. A second torque sensor is embedded in the bottom of the second clamping plate. The connecting block has a threaded hole that is threadedly engaged with the long bolt.

[0010] Preferably, the bottom of the connecting block is slidably fitted into the groove, and a gap is left between the bottom end face of the long bolt and the top end face of the base.

[0011] Preferably, the output end of the electric push rod is fixedly connected to the outer surface of the connecting block.

[0012] Preferably, four mounting blocks are fixedly connected to the outer surface of the base, and the four mounting blocks are arranged in a rectangular pattern.

[0013] Preferably, the center between the first clamping plate and the second clamping plate, the center of the motor output end, and the center of the coupling are on the same straight line.

[0014] Preferably, there are two long bolts, and two through holes are opened on the second clamping plate. The nut end of the long bolt overlaps the second clamping plate, and the threaded end of the second clamping plate passes through the through holes of the second clamping plate.

[0015] The advantages of this utility model are:

[0016] 1. This utility model achieves automatic adjustment of the horizontal position of the measuring component through the sliding fit structure design of the electric push rod and the slide groove, which solves the problems of traditional devices being difficult to adapt to different specifications of ball screws and having low adjustment efficiency, and improves the convenience of measurement operation and the versatility and efficiency of the equipment;

[0017] 2. This utility model achieves the functions of ensuring the stability of device installation and the coaxiality of power transmission by fixing the base with four mounting blocks arranged in a rectangle and aligning the clamping plate with the motor shaft. It solves the problem of measurement error caused by installation eccentricity or shaking, and improves the data consistency and equipment lifespan efficiency during long-term measurement. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the friction torque measuring device of this utility model;

[0020] Figure 2 is a schematic diagram of the back structure of the friction torque measuring device of this utility model;

[0021] Figure 3 is a schematic diagram of the base assembly structure of this utility model;

[0022] Figure 4 is a schematic diagram of the measuring component of this utility model.

[0023] In the diagram: 1. Base assembly; 101. Base; 102. Slide groove; 103. Mounting block; 2. Fixing plate; 3. Motor; 4. Coupling; 5. Electric push rod; 6. Measuring assembly; 601. Connecting block; 602. First clamping plate; 603. First torque sensor; 604. Second clamping plate; 605. Second torque sensor; 606. Long bolt. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] The present application will be further described in detail below with reference to Figures 1-4.

[0026] This application discloses a ball screw friction torque measuring device. Referring to Figures 1 to 4, the ball screw friction torque measuring device includes a base assembly 1, a fixing plate 2, and a measuring assembly 6.

[0027] The base assembly 1 includes a base 101, the top of which is provided with a sliding groove 102, and four mounting blocks 103 are fixedly connected to the outer surface of the base 101, and the four mounting blocks 103 are arranged in a rectangular shape.

[0028] A motor 3 is installed on the top surface of the fixed plate 2, and a coupling 4 is installed at the output end of the motor 3. An electric push rod 5 is installed on one side surface of the fixed plate 2, and the output end of the electric push rod 5 is fixedly connected to the outer surface of the connecting block 601.

[0029] The electric push rod 5 pushes the connecting block 601 to slide in the groove 102 of the base 101, realizing the horizontal movement of the measuring component 6 to accommodate ball screws of different specifications and ensure uniform clamping force.

[0030] Motor 3 transmits rotational power to ball screw through coupling 4, causing it to rotate.

[0031] The measuring component 6 includes a connecting block 601 and a long bolt 606. A first clamping plate 602 is fixedly connected to the top of the connecting block 601. A first torque sensor 603 is embedded in the top of the first clamping plate 602. A second clamping plate 604 is sleeved on the long bolt 606. A second torque sensor 605 is embedded in the bottom of the second clamping plate 604. The connecting block 601 has a threaded hole that is threadedly engaged with the long bolt 606. The bottom of the connecting block 601 is slidably engaged with the slide groove 102. There is a gap between the bottom end face of the long bolt 606 and the top end face of the base 101. The center between the first clamping plate 602 and the second clamping plate 604, the center of the output end of the motor 3, and the center of the coupling 4 are on the same straight line. There are two long bolts 606. Two through holes are opened on the second clamping plate 604. The nut end of the long bolt 606 overlaps the second clamping plate 604. The threaded end of the second clamping plate 604 passes through the through holes of the second clamping plate 604.

[0032] The first clamping plate 602 and the second clamping plate 604 clamp the ball screw together with the long bolt 606. The first torque sensor 603 and the second torque sensor 605 are respectively embedded in the first clamping plate 602 and the second clamping plate 604 to directly sense the resistance torque when the screw rotates.

[0033] The torque data collected by the first torque sensor 603 and the second torque sensor 605 are transmitted to the external control system through the circuit. After calculation, the friction torque value is output, which solves the problems of low measurement accuracy or complicated operation in the prior art.

[0034] By embedding the first torque sensor 603 and the second torque sensor 605 into the first clamping plate 602 and the second clamping plate 604, the function of synchronous real-time acquisition of friction torque at both ends of the ball screw is realized. This solves the problems of large axial force interference and low data accuracy in traditional measurement, and improves the accuracy, reliability and efficiency of friction torque measurement.

[0035] Working principle:

[0036] Device installation and initial commissioning:

[0037] Base fixing: The device is fixed to the workbench or experimental platform by four mounting blocks 103 arranged in a rectangle on the outer surface of the base 101 to ensure that the base is horizontal and stable.

[0038] Center alignment: Adjust the position of the fixing plate 2 so that the center between the first clamping plate 602 and the second clamping plate 604, the center of the output end of the motor 3 and the center of the coupling 4 are on the same straight line (marked 5) to avoid measurement errors caused by eccentricity.

[0039] Ball screw clamping:

[0040] Place the ball screw: Place the ball screw to be measured in the gap between the first clamping plate 602 and the second clamping plate 604.

[0041] Clamping adjustment: Two long bolts 606 pass through the opening of the second clamping plate 604 and engage with the threaded hole of the connecting block 601. Rotating the long bolts 606 causes the second clamping plate 604 to move upward and clamp the lead screw together with the first clamping plate 602. At this time, the bottom end face of the long bolt 606 and the top end face of the base 101 are left with a gap mark 2 to prevent the base from rubbing and interfering with the measurement.

[0042] Adjust position:

[0043] Start the electric push rod: The output end of the electric push rod 5 is fixedly connected to the outer surface of the connecting block 601 marked with number 3. After power is applied, the push rod extends or shortens, pushing the connecting block 601 to slide along the slide groove 102 of the base 101, driving the measuring component 6 to move horizontally, so that the lead screw is on the extended line of the axis of the motor 3 and the coupling 4, ensuring that the force is uniform during rotation.

[0044] Torque measurement and data acquisition:

[0045] Start the motor: After the motor 3 is powered on, it drives the ball screw to rotate through the coupling 4. The frictional torque between the screw and the nut is transmitted to the first torque sensor 603 and the second torque sensor 605 through the clamp.

[0046] Real-time measurement: Two torque sensors synchronously collect torque data from the upper and lower ends of the lead screw and transmit it to an external data acquisition system via a signal line. The system automatically calculates the average torque or difference, eliminating the influence of axial force and improving measurement accuracy.

[0047] Measurement completed and device reset:

[0048] Stop the motor: After the measurement is completed, turn off motor 3, and the lead screw will stop rotating.

[0049] Loosen the clamp: Rotate the long bolt 606 in the opposite direction to lower the second clamp 604, loosen the lead screw and remove it.

[0050] Electric push rod reset: Control the electric push rod 5 to retract, driving the connecting block 601 back to the initial position, in preparation for the next measurement.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A ball screw friction torque measuring device, characterized in that, include: The base assembly (1) includes a base (101) with a groove (102) on the top of the base (101); a fixing plate (2) with a motor (3) mounted on the top surface of the fixing plate (2) and a coupling (4) mounted on the output end of the motor (3); and an electric push rod (5) mounted on one side surface of the fixing plate (2); and a measuring assembly (6) including a connecting block (601) and a long bolt (606). The top of the connecting block (601) is fixedly connected to a first clamping plate (602), and a first torque sensor (603) is embedded in the top of the first clamping plate (602). A second clamping plate (604) is fitted on the long bolt (606), and a second torque sensor (605) is embedded in the bottom of the second clamping plate (604). The connecting block (601) has a threaded hole that is threadedly engaged with the long bolt (606).

2. The ball screw friction torque measuring device according to claim 1, characterized in that: The bottom of the connecting block (601) is slidably fitted into the groove (102), and there is a gap between the bottom end face of the long bolt (606) and the top end face of the base (101).

3. The ball screw friction torque measuring device according to claim 1, characterized in that: The output end of the electric push rod (5) is fixedly connected to the outer surface of the connecting block (601).

4. The ball screw friction torque measuring device according to claim 1, characterized in that: Four mounting blocks (103) are fixedly connected to the outer surface of the base (101), and the four mounting blocks (103) are arranged in a rectangular shape.

5. The ball screw friction torque measuring device according to claim 1, characterized in that: The center between the first clamping plate (602) and the second clamping plate (604), the center of the output end of the motor (3) and the center of the coupling (4) are on the same straight line.

6. The ball screw friction torque measuring device according to claim 1, characterized in that: There are two long bolts (606), and two through holes are opened on the second clamping plate (604). The nut end of the long bolt (606) overlaps the second clamping plate (604), and the threaded end of the second clamping plate (604) passes through the through hole of the second clamping plate (604).

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