A hand-held expansion force detection tool

Abstract

The utility model discloses a portable expansion tightness detection frock, including fixed plate, the upper surface both sides of fixed plate all fixed mounting have triangle seat, and the top between two triangle seat fixed mounting has the thread plate, and the center position of thread plate is provided with the thread hole, and the inside screw thread connection of thread hole has the thread column, and the bottom of thread column is installed with fixed block through bearing, and the lower surface center position of fixed block is fixed mounting and has pressure sensor, and the center position of the outer surface of fixed plate is provided with the through groove for the pressure sensor to pass, the utility model has the practical use characteristic of pressure sensor contact level plane dynamic screw thread adjustment, when actually using, through the screw thread movement adjustment of pressure sensor up and down, can make it suitable for the expansion tight shaft of different diameters and carry out expansion tightness detection use, can satisfy the tension detection work of different diameter shaft body, effectively improve the detection applicability of structure, reduce the use limited effect, improve the scope of application.

Description

Technical Field

[0001] This utility model relates to the field of tension detection technology, specifically a hand-held tension force detection fixture. Background Technology

[0002] The tensioning force is a mechanical device that achieves a keyless connection between the shaft and the machine parts by using the tensioning pressure generated by the high-strength bolts when the tensioning sleeve is working. It is mainly used to transmit torque, axial force or combined loads.

[0003] The tension force is mainly generated by the expansion of the tension shaft. In the production process of the tension shaft, in order to detect the tension parameters of the shaft, it is often necessary to test the tension force of the tension shaft.

[0004] The prior art CN201620978293.5 discloses a combined camshaft tensioning device capable of detecting tension force, including a combined camshaft workpiece, a machine body, a tensioning hydraulic cylinder, a clamping mechanism, and a pressure sensor. The combined camshaft workpiece includes a round tube and a cam disposed outside the round tube. The top of the machine body is equipped with a hydraulic cylinder support arm, a tensioning support arm, and a clamping support arm from left to right. The tensioning hydraulic cylinder is mounted on the hydraulic cylinder support arm. The tensioning hydraulic cylinder has a push rod that is hydraulically driven to extend and retract. The end of the push rod passes through the hydraulic cylinder support arm and the tensioning support arm in sequence and contacts the combined camshaft workpiece. A clamping mechanism is mounted on the clamping support arm. The combined camshaft workpiece is clamped and mounted between the end of the push rod and the clamping mechanism. A pressure sensor for detecting the clamping force of the clamping mechanism is correspondingly mounted on the clamping mechanism.

[0005] Existing technologies can intuitively determine whether the cam and the workpiece tube of the combined camshaft are properly engaged, which can intuitively reflect the production quality of the combined camshaft. However, in actual use, the existing technology has a relatively complex overall structure, is difficult to operate, has high manufacturing and purchase and use costs, and is not convenient for testing the tension force of expansion shafts of different diameters, which has certain shortcomings. Therefore, this utility model proposes a hand-held tension force testing fixture. Utility Model Content

[0006] The purpose of this invention is to provide a handheld tension force testing fixture to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a handheld tension force testing fixture, comprising a fixed plate, with triangular seats fixedly installed on both sides of the upper surface of the fixed plate, a threaded plate fixedly installed between the tops of the two triangular seats, a threaded hole opened at the center of the threaded plate, a threaded post threadedly connected to the threaded hole, a fixed block installed at the bottom end of the threaded post via a bearing, a pressure sensor fixedly installed at the center of the lower surface of the fixed block, and a through groove for the pressure sensor to pass through opened at the center of the outer surface of the fixed plate.

[0008] Preferably, a rotating disk is fixedly installed on the top surface of the threaded column.

[0009] Preferably, collars are fixedly installed on both sides of the lower surface of the fixing plate.

[0010] Preferably, the fixing plate and the collar adopt an integral molding structure design.

[0011] Preferably, a carrying handle is fixedly installed on the outer surface of both of the triangular seats.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention allows for adjustment of the extension distance of a pressure sensor by moving its upper and lower threads, thus providing a practical feature of dynamic thread adjustment for the pressure sensor's contact with the horizontal plane. In actual use, by adjusting the upper and lower threads of the pressure sensor, it can be adapted to use for tension force detection on tension shafts of different diameters. This satisfies the tension force detection needs of shafts of different diameters, effectively improving the applicability of the structure, reducing limitations in use, and expanding the scope of application, thus exhibiting good practical characteristics.

[0014] Furthermore, the tension force testing fixture of this utility model has a simple overall structure, low operational difficulty during testing, and low manufacturing and usage costs, making it suitable for small and micro enterprises to purchase and use. The overall size of the testing fixture is small, making it easy to carry and transfer by hand, thus achieving good portability. The overall structure is more convenient to use and suitable for tension force testing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall external structure of the testing fixture according to an embodiment of the present utility model;

[0016] Figure 2 This is a bottom view of the detection fixture in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the detection assembly structure according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the internal cross-section of the front of the detection tooling according to an embodiment of the present invention.

[0019] In the diagram: 1. Fixed plate; 2. Triangular seat; 3. Threaded plate; 4. Threaded post; 5. Bearing; 6. Fixed block; 7. Pressure sensor; 8. Rotary disk; 9. Collar; 10. Handle. Detailed Implementation

[0020] 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 protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1-4 One embodiment of this utility model is a handheld tension force testing fixture, which includes a fixed plate 1. Triangular seats 2 are fixedly installed on both sides of the upper surface of the fixed plate 1. A threaded plate 3 is fixedly installed between the tops of the two triangular seats 2. A threaded hole is opened at the center of the threaded plate 3. A threaded post 4 is threadedly connected in the threaded hole. When the threaded post 4 is rotated clockwise or counterclockwise, it can move up and down in the threaded hole of the threaded plate 3.

[0024] Furthermore, a fixing block 6 is installed at the bottom end of the threaded column 4 via a bearing 5. A pressure sensor 7 is fixedly installed at the center of the lower surface of the fixing block 6. The fixing block 6 can provide a plate space for the pressure sensor 7. In order to avoid the fixing plate 1 from blocking the pressure sensor 7, a through groove is opened at the center of the outer surface of the fixing plate 1 for the pressure sensor 7 to pass through.

[0025] This structural design allows the threaded column 4 to rotate clockwise or counterclockwise, simultaneously driving the pressure sensor 7 at its bottom to move up and down. This adjustment, achieved through the up-and-down threaded movement of the pressure sensor 7, changes the extension distance of the pressure sensor 7. This provides the practical characteristic of dynamic threaded adjustment of the pressure sensor 7 against the horizontal plane. In actual use, by adjusting the up-and-down threaded movement of the pressure sensor 7, it can be adapted for use with tensioning shafts of different diameters for tension force detection. This satisfies the tension force detection needs of shafts with varying diameters, effectively improving the structure's applicability, reducing limitations, and expanding its scope of application, thus exhibiting excellent practical performance.

[0026] In this embodiment, in order to facilitate manual rotation of the threaded post 4, a rotating disk 8 is fixedly installed on the top surface of the threaded post 4. Thus, the threaded post 4 can be manually rotated clockwise or counterclockwise by means of the rotating disk 8.

[0027] In this embodiment, in order to facilitate the fitting of the expansion shaft to be tested, collars 9 are fixedly installed on both sides of the lower surface of the fixing plate 1. In actual use, the expansion shaft that needs to be tested for tension can be inserted into the two collars 9, so that the initial fitting work with the expansion shaft can be completed through the collars 9, thus preventing the expansion shaft from falling off.

[0028] In order to improve the integrated production and use effect of the structure, the fixing plate 1 and the collar 9 adopt an integrated molding structure design.

[0029] In this embodiment, a carrying handle 10 is fixedly installed on the outer surface of both triangular bases 2. The carrying handle 10 makes it convenient to carry the testing fixture of this utility model by hand, thereby improving the portability of the testing fixture of this utility model and making it easier to carry and transfer by hand.

[0030] Working principle: When using the tension force testing fixture of this utility model, the expansion shaft that needs to be tested for tension force can be inserted into the two collars 9. In this way, the collars 9 can complete the initial connection with the expansion shaft, thus preventing the expansion shaft from falling off.

[0031] Then, the threaded column 4 can be manually driven to rotate by the set rotating disk 8, so that the threaded column 4 moves downward. During the downward movement of the threaded column 4, it can simultaneously drive the pressure sensor 7 at the bottom to move downward, so that the detection end face of the pressure sensor 7 contacts the expansion end face of the expansion shaft. In this way, the downward pressure of the pressure sensor 7 can cooperate with the collar 9 to press and limit the shaft, preventing the shaft from moving up and down.

[0032] Afterwards, the inspector drives the expansion shaft to expand. The expansion key bar in the expanded state can push the pressure sensor 7 upward, thereby applying expansion pressure to the pressure sensor 7 through the expanded expansion key bar. The pressure sensor 7 can sense the expansion pressure applied by the expansion key bar, thereby detecting the expansion force of the expansion shaft and completing the expansion shaft expansion force detection work of the inspection fixture of this utility model.

[0033] In summary, this utility model can effectively detect the tension force numerically through the pressure sensor 7, helping operators understand the tension force parameters of the shaft. Furthermore, by adjusting the up-and-down thread movement of the pressure sensor 7, the extension distance of the pressure sensor 7 can be changed, thus providing the practical characteristic of dynamic thread adjustment of the pressure sensor 7 in contact with the horizontal plane. In actual use, by adjusting the up-and-down thread movement of the pressure sensor 7, it can be applied to tension shafts of different diameters for tension force detection, meeting the needs of tension force detection work for shafts of different diameters. This effectively improves the applicability of the structure, reduces usage limitations, expands the scope of application, and has good practical characteristics.

[0034] Furthermore, the tension force testing fixture of this utility model has a simple overall structure, low operational difficulty during testing, and low manufacturing and usage costs, making it suitable for small and micro enterprises to purchase and use. The overall size of the testing fixture is small, making it easy to carry and transfer by hand, thus achieving good portability. The overall structure is more convenient to use and suitable for tension force testing.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A handheld tension force testing fixture, comprising a fixing plate (1), characterized in that, Triangular seats (2) are fixedly installed on both sides of the upper surface of the fixed plate (1). A threaded plate (3) is fixedly installed between the tops of the two triangular seats (2). A threaded hole is opened at the center of the threaded plate (3). A threaded post (4) is threadedly connected in the threaded hole. A fixed block (6) is installed at the bottom of the threaded post (4) through a bearing (5). A pressure sensor (7) is fixedly installed at the center of the lower surface of the fixed block (6). A through groove for the pressure sensor (7) to pass through is opened at the center of the outer surface of the fixed plate (1).

2. The handheld tension force testing fixture according to claim 1, characterized in that: A rotating disk (8) is fixedly installed on the top surface of the threaded column (4).

3. The handheld tension force testing fixture according to claim 1, characterized in that: Both sides of the lower surface of the fixing plate (1) are fixedly installed with collars (9).

4. The handheld tension force testing fixture according to claim 3, characterized in that: The fixing plate (1) and the collar (9) adopt an integrated molding structure design.

5. A handheld tension force testing fixture according to claim 1, characterized in that: A carrying handle (10) is fixedly installed on the outer surface of each of the two triangular bases (2).

Images