A tachometer clamp fixture

Abstract

The utility model relates to a kind of tachometer clamp tool, including switch type magnetic base, joint arm and the fixed seat for placing tachometer;Joint arm one end is connected with switch type magnetic base by first connecting component, and fixed seat is connected with the end of joint arm away from switch type magnetic base by second connecting component;The clamp tool of the utility model when installing tachometer, switch type magnetic base is fixed at the position away from motor rotating shaft, then tachometer is placed in fixed seat, tachometer is locked after rotating fixed seat and adjusting to appropriate angle, rotate joint arm, adjust the position of fixed seat, make tachometer close to motor rotating shaft, after the detection head of tachometer contacts motor rotating shaft, lock joint arm, after detection is completed, loosen first bolt, rotate joint arm, make tachometer away from motor rotating shaft, tachometer is taken down, the installation and disassembly of tachometer are completed at the position away from motor rotating shaft, high safety, and without motor shutdown and to lathe modification.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology for tachometers, and in particular to a tachometer fixture. Background Technology

[0002] A tachometer is an instrument used to measure the rotational speed of moving parts. Contact tachometers measure the rotational or linear speed of the object being measured by physical contact between their built-in probe and the object. Tachometers are often used to detect the shaft speed of lathe motors to evaluate the motor's operating condition.

[0003] Tachometers are typically placed near the motor shaft either by hand or on a fixed mount. Holding the tachometer near the motor shaft by hand poses a significant safety hazard due to the high-speed rotation of the shaft. Installing a fixed mount for the tachometer on a lathe requires modifying the lathe bed within a confined space, which is difficult and can easily damage the lathe itself. If the tachometer needs to be removed for testing other equipment, its proximity to the high-speed motor shaft necessitates stopping the motor before removal, a cumbersome process that can disrupt normal motor operation.

[0004] Therefore, this utility model proposes a tachometer fixture to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a tachometer fixture that does not require the motor to be stopped when installing and disassembling the tachometer, making it convenient to operate and highly safe.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a tachometer fixture, the innovation of which is: including a switchable magnetic base, an articulated arm and a fixed base for placing the tachometer; One end of the articulated arm is connected to the switchable magnetic base via a first connecting assembly. The first connecting assembly includes an internally threaded post and a first bolt. The internally threaded post is fixedly installed on the side wall of the switchable magnetic base. A first threaded hole matching the first bolt is opened on the end face of the internally threaded post. A cylindrical protrusion extends outward from the side wall of the articulated arm. The central axis of the cylindrical protrusion is perpendicular to the central axis of the articulated arm. A first through hole for the internally threaded post to pass through is opened in the middle of the cylindrical protrusion. The internally threaded post passes through the first through hole. The first bolt is threadedly connected to the first threaded hole. By tightening the first bolt, the cylindrical protrusion is pressed tightly onto the side wall of the switchable magnetic base. The fixed base is connected to the end of the articulated arm away from the switch-type magnetic base via a second connecting assembly. The second connecting assembly includes a universal ball, a universal ball seat, and a second bolt. The universal ball seat is fixed to the end of the articulated arm. The universal ball seat has a ball groove that matches the outward ball. One side of the universal ball is fixedly connected to the bottom surface of the fixed base, and the other side is movably disposed in the ball groove. The universal ball seat has a second threaded hole that matches the second bolt. The second bolt is threaded into the second threaded hole. By rotating the second bolt, the end of the second bolt is pressed tightly against the outer wall of the universal ball.

[0007] Furthermore, a friction pad is installed on each of the two end faces of the cylindrical protrusion.

[0008] Furthermore, the articulated arm includes a plurality of connecting rods arranged in sequence. Each pair of adjacent connecting rods is connected to each other by a joint assembly. The joint assembly includes an external threaded rod, a nut, and a hinge seat. The external threaded rod and the hinge seat are respectively fixed to the ends of two adjacent connecting rods by sleeves. The central axis of the external threaded rod is perpendicular to the central axis of the connecting rod. The hinge seat is movably fitted on the outside of the external threaded rod. The nut is threadedly connected to the side of the hinge seat away from the connecting rod on the external threaded rod.

[0009] Furthermore, the top surface of the fixed base has a limiting groove for placing a tachometer. The tachometer is placed in the limiting groove and fixed in the limiting groove by a third bolt. A U-shaped plate is provided on the outside of the upper limiting groove of the fixed base. A third threaded hole matching the third bolt is opened on the U-shaped plate. The third bolt is threaded into the third threaded hole.

[0010] The advantages of this utility model are: (1) When installing the tachometer, the fixture of this utility model first fixes the switch-type magnetic base at a position away from the motor shaft, then places the tachometer in the fixed base. With the help of the universal ball and universal ball seat between the fixed base and the joint arm, the fixed base is rotated to adjust the tachometer to a suitable angle. Then, the second bolt is tightened to lock the fixed base. Then, with the help of the connection between the cylindrical protrusion and the internal thread column between the joint arm and the switch-type magnetic base, the joint arm is rotated to adjust the position of the fixed base so that the tachometer is close to the motor shaft. After the probe of the tachometer contacts the motor shaft, the first bolt is tightened to lock the joint arm. After the test is completed, the first bolt is loosened, the joint arm is rotated to move the tachometer away from the motor shaft, and then the tachometer is removed. The installation and removal of the tachometer are both completed at a position away from the motor shaft, which is highly safe and does not require stopping the motor or modifying the lathe.

[0011] (2) By installing friction pads on both sides of the cylindrical protrusion, the friction between the cylindrical protrusion and the side wall of the switch-type magnetic base and the end face of the first bolt is increased, thereby increasing the torsional resistance of the joint arm and preventing the joint arm from failing to be fixed on the switch-type magnetic base.

[0012] (3) The articulated arm of this utility model includes several connecting rods arranged in sequence. Each pair of adjacent connecting rods are hinged together by an external thread rod and a hinge seat. By rotating the connecting rod, the length and height of the articulated arm can be adjusted, thereby adjusting the position of the fixed seat. By rotating and tightening the nut, the state of the articulated arm can be fixed. The structure is simple and the operation is convenient.

[0013] (4) This utility model sets a third bolt on the fixed seat. The third bolt is installed on the outside of the upper limit groove of the fixed seat through a U-shaped plate. After the tachometer is placed in the limit groove, the third bolt is rotated and tightened. The end of the third bolt is pressed tightly against the tachometer, thereby fixing the tachometer in the limit groove and preventing the tachometer from moving in the limit groove and affecting the tachometer detection efficiency. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the tachometer fixture of this utility model.

[0016] Figure 2 This is a cross-sectional view of the joint assembly in the AA direction of this utility model.

[0017] Figure 3 This is a cross-sectional view of the first connecting component in the BB direction of this utility model. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Example This embodiment provides a tachometer fixture, such as... Figure 1-3 As shown, it includes a switchable magnetic base 1, an articulated arm 2, and a fixed base 3 for placing the tachometer.

[0020] The articulated arm 2 includes two sequentially arranged connecting rods 21, which are interconnected by a joint assembly 5. The joint assembly 5 includes an externally threaded rod 52, a nut 54, and a hinge seat 53. The externally threaded rod 52 and the hinge seat 53 are respectively fixed to the ends of two adjacent connecting rods 21 by sleeves 51. The sleeve 51 corresponding to the externally threaded rod 52 is the first sleeve 51, and the sleeve 51 corresponding to the hinge seat 53 is the second sleeve 51. The first sleeve 51 and the second sleeve 51 are respectively fixedly fitted onto the ends of the two connecting rods 21. The externally threaded rod 52 is integrally formed on the joint assembly 5. On the outer wall of the first sleeve 51, and with the central axis of the external thread rod 52 perpendicular to the central axis of the connecting rod 21, the hinge seat 53 is integrally formed at the end of the second sleeve 51. The hinge seat 53 has a hinge hole that matches the external thread rod 52. The external thread rod 52 passes through the hinge hole, so that the hinge seat 53 is movably fitted on the outside of the external thread rod 52. The horn nut 54 is threadedly connected to the side of the hinge seat 53 away from the connecting rod 21 on the external thread rod 52. Tightening the horn nut 54 presses the hinge seat 53 tightly onto the first sleeve 51, thereby achieving relative fixation between the two connecting rods 21.

[0021] One end of the articulated arm 2 is connected to the switchable magnetic base 1 via a first connecting assembly 4. The first connecting assembly 4 includes an internally threaded post 41 and a first bolt 42. The internally threaded post 41 is fixedly installed on the side wall of the switchable magnetic base 1. A first threaded hole matching the first bolt 42 is opened on the end face of the internally threaded post 41. In order to increase the contact area between the articulated arm 2 and the first bolt 42, make the locking strength of the articulated arm 2 higher, and improve the torsional resistance of the articulated arm 2, a cylindrical protrusion 22 extends outward from the side wall of the articulated arm 2. The central axis of the cylindrical protrusion 22 is perpendicular to the central axis of the articulated arm 2. A hole for internal threading is opened in the middle of the cylindrical protrusion 22. The threaded post 41 passes through the first through hole, and the internal threaded post 41 is installed inside the first through hole. The first bolt 42 is located on the side of the cylindrical protrusion 22 away from the switch-type magnetic base 1 and is threaded into the first threaded hole. By tightening the first bolt 42, the cylindrical protrusion 22 is pressed tightly against the side wall of the switch-type magnetic base 1. In order to further improve the torsional resistance of the joint arm 2, a friction pad 23 is installed on each of the two end faces of the cylindrical protrusion 22 to increase the friction between the cylindrical protrusion 22 and the side wall of the switch-type magnetic base 1 and the end face of the first bolt 42, thereby increasing the torsional resistance of the joint arm 2 and preventing the joint arm 2 from failing to be fixed.

[0022] The fixed base 3 is connected to the end of the articulated arm 2 away from the switch-type magnetic base 1 via the second connecting component 6. The second connecting component 6 includes a universal ball 61, a universal ball seat 62, and a second bolt 63. The universal ball seat 62 is fixed to the end of the articulated arm 2. The universal ball seat 62 has a ball groove that matches the universal ball 61. One side of the universal ball 61 is fixedly connected to the bottom surface of the fixed base 3, and the other side is movably disposed in the ball groove. The universal ball seat 62 has a second threaded hole that matches the second bolt 63. The second bolt 63 is threaded into the second threaded hole. By rotating the second bolt 63, the end of the second bolt 63 is pressed tightly against the outer wall of the universal ball 61, thereby fixing the universal ball 61 and the universal ball seat 62 relative to each other.

[0023] The top surface of the fixed base 3 has a limiting groove 31 for placing the tachometer. The tachometer is placed in the limiting groove 31 and fixed in the limiting groove 31 by the third bolt 33. A U-shaped plate 32 is provided on the outside of the limiting groove 31 on the fixed base 3. The U-shaped plate 32 has a third threaded hole that matches the third bolt 33. The third bolt 33 is threaded into the third threaded hole. After the tachometer is placed in the limiting groove 31, the third bolt 33 is rotated so that the end of the third bolt 33 presses against the tachometer, preventing the tachometer from moving in the limiting groove 31 and ensuring the detection accuracy of the tachometer.

[0024] When installing the tachometer, first turn on the switch of the switch-type magnetic base 1. The switch-type magnetic base 1 is magnetically fixed in a position away from the motor shaft. Then, place the tachometer in the fixed base 3 and tighten the third bolt 33 to fix the tachometer. Loosen the second bolt 63. With the help of the connection between the fixed base 3 and the joint arm 2, rotate the fixed base 3 to adjust the tachometer to a suitable angle. Then, tighten the second bolt 63 to lock the fixed base 3. Then, loosen the nut 54. With the help of the connection structure between the external thread rod 52 and the hinge seat 53 between the two connecting rods 21, rotate the connecting rod 21 to adjust the length and height of the joint arm 2. After adjustment, tighten the nut 54 to fix the extended state of the joint arm 2. Only by loosening the first bolt 42, and utilizing the connection between the cylindrical protrusion 22 and the internally threaded post 41 between the articulated arm 2 and the switch-type magnetic base 1, can the articulated arm 2 be rotated to adjust the position of the fixed base 3, bringing the tachometer closer to the motor shaft. Once the tachometer's probe contacts the motor shaft, the first bolt 42 is tightened to lock the articulated arm 2. After the test is completed, the first bolt 42 is loosened, the articulated arm 2 is rotated to move the tachometer away from the motor shaft, and then the tachometer can be removed. The installation and removal of the tachometer are both completed away from the motor shaft, ensuring high safety and eliminating the need to stop the motor or modify the lathe.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tachometer fixture, characterized in that: Includes a switchable magnetic base, an articulated arm, and a mounting base for holding the tachometer; One end of the articulated arm is connected to the switchable magnetic base via a first connecting assembly. The first connecting assembly includes an internally threaded post and a first bolt. The internally threaded post is fixedly installed on the side wall of the switchable magnetic base. A first threaded hole matching the first bolt is opened on the end face of the internally threaded post. A cylindrical protrusion extends outward from the side wall of the articulated arm. The central axis of the cylindrical protrusion is perpendicular to the central axis of the articulated arm. A first through hole for the internally threaded post to pass through is opened in the middle of the cylindrical protrusion. The internally threaded post passes through the first through hole. The first bolt is threadedly connected to the first threaded hole. By tightening the first bolt, the cylindrical protrusion is pressed tightly onto the side wall of the switchable magnetic base. The fixed base is connected to the end of the articulated arm away from the switch-type magnetic base via a second connecting assembly. The second connecting assembly includes a universal ball, a universal ball seat, and a second bolt. The universal ball seat is fixed to the end of the articulated arm. The universal ball seat has a ball groove that matches the outward ball. One side of the universal ball is fixedly connected to the bottom surface of the fixed base, and the other side is movably disposed in the ball groove. The universal ball seat has a second threaded hole that matches the second bolt. The second bolt is threaded into the second threaded hole. By rotating the second bolt, the end of the second bolt is pressed tightly against the outer wall of the universal ball.

2. The tachometer fixture according to claim 1, characterized in that: A friction pad is installed on each of the two end faces of the cylindrical protrusion.

3. The tachometer fixture according to claim 1, characterized in that: The articulated arm includes several connecting rods arranged in sequence. Each pair of adjacent connecting rods is connected to each other by a joint assembly. The joint assembly includes an external threaded rod, a nut, and a hinge seat. The external threaded rod and the hinge seat are respectively fixed to the ends of two adjacent connecting rods by sleeves. The central axis of the external threaded rod is perpendicular to the central axis of the connecting rod. The hinge seat is movably fitted on the outside of the external threaded rod. The nut is threadedly connected to the side of the hinge seat away from the connecting rod on the external threaded rod.

4. The tachometer fixture according to claim 1, characterized in that: The top surface of the fixed base has a limiting groove for placing a tachometer. The tachometer is placed in the limiting groove and fixed in the limiting groove by a third bolt. A U-shaped plate is provided on the outside of the upper limiting groove of the fixed base. A third threaded hole matching the third bolt is opened on the U-shaped plate. The third bolt is threaded into the third threaded hole.

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