A tool for life test of linear displacement sensor

Abstract

The present invention discloses a tool for life test of linear displacement sensor, which is used to transmit the axial power of the power output shaft on the life test equipment to the movable end of the linear displacement sensor, including a first connecting member, a vertical sliding column, a second connecting member, a transverse sliding column and a clamping member, one end of the first connecting member is connected to the power output shaft, the first connecting member is slidably connected to the vertical sliding column, the lower end of the vertical sliding column is connected to the upper end of the second connecting member, the second connecting member is slidably connected to the transverse sliding column, the upper end of the clamping member is mounted on the second connecting member, and the lower end of the clamping member is connected to the movable end of the linear displacement sensor. The tool for life test of linear displacement sensor of the present invention eliminates the transverse stress and vertical stress generated by the vibration of the power output shaft, and solves the problem that the power output shaft applies extra stress to the movable end of the linear displacement sensor, thereby affecting the test results and damaging the linear displacement sensor and the life test equipment.

Description

Technical Field

[0001] The invention relates to a sensor life test auxiliary device, in particular to a tooling for a linear displacement sensor life test. Background Art

[0002] The linear displacement sensor is used for linear position detection, feedback of the linear position of the servo motor, and realization of closed-loop control of the servo mechanism. The linear displacement sensor is an important part of the servo system, and its sliding life directly affects the life of the servo system. Therefore, the linear displacement sensor usually requires a sliding life of up to 100W times. In order to verify the reliability of the linear displacement sensor, a life verification test is required. Because the linear displacement sensor requires too many sliding life times, the test can only be completed with the help of life test equipment.

[0003] The traditional linear displacement sensor life test equipment consists of a test bench and a power output shaft. When in use, the linear displacement sensor is fixed on the test bench, and the active end of the linear displacement sensor is directly rigidly connected to the power output shaft of the life test equipment. At the beginning of the test, the power output shaft drives the active end of the linear displacement sensor to perform linear reciprocating motion.

[0004] The above-mentioned traditional linear displacement sensor life test equipment has the following defects:

[0005] Since the life test equipment is a general-purpose equipment, the size of the power output shaft is relatively long. The power output shaft will experience irregular vibrations when performing reciprocating motion for a long time. These irregular vibrations will apply additional lateral and / or vertical stresses to the active end of the linear displacement sensor, thereby affecting the test results. In severe cases, the linear displacement sensor and the life test equipment will be damaged. Summary of the invention

[0006] The purpose of the present invention is to provide a tool for life test of a linear displacement sensor which can eliminate the lateral and vertical stresses generated during the movement of the power output shaft in order to solve the above-mentioned problem.

[0007] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0008] A tooling for life test of a linear displacement sensor is used to transmit the axial power of a power output shaft with a horizontal axis on a life test device to the active end of the linear displacement sensor, comprising a first connecting member, a vertical sliding column, a second connecting member, a horizontal sliding column and a clamping member, one end of the first connecting member is connected to the power output shaft, the first connecting member is slidably connected to the vertical sliding column and can and can only slide vertically, the lower end of the vertical sliding column is connected to the upper end of the second connecting member, the second connecting member is slidably connected to the horizontal sliding column and can and can only slide horizontally, the upper end of the clamping member is installed on the second connecting member, and the lower end of the clamping member is connected to the active end of the linear displacement sensor.

[0009] Preferably, in order to reduce the sliding friction of the first connecting member sliding on the vertical sliding column and the second connecting member sliding on the transverse sliding column, the first connecting member is provided with a vertical through hole and a vertical first linear bearing is installed in the vertical through hole, and the first linear bearing is sleeved outside the vertical sliding column, and the second connecting member is provided with a transverse through hole and a transverse second linear bearing is installed in the transverse through hole, and the second linear bearing is sleeved outside the transverse sliding column.

[0010] Preferably, in order to achieve a more stable transmission effect, the vertical sliding column and the first linear bearing are both two and are respectively located on the laterally symmetrical sides of the power output shaft, the transverse sliding column and the second linear bearing are both two and are respectively located on the laterally symmetrical sides of the clamping member, and the vertical center axis of the clamping member and the transverse center axis of the power output shaft are located in the same vertical plane.

[0011] Preferably, in order to achieve a more stable connection and transmission effect, the upper surface and one side surface of the second connecting member are provided with installation grooves to form an inverted "L"-shaped groove, and the upper section of the clamping member is inverted "L" shape and is placed in the inverted "L"-shaped groove.

[0012] Preferably, in order to quickly and stably clamp the movable end of the linear displacement sensor, the lower end of the clamping member is provided with a clamping groove with an open lower end, and screw holes are provided on the two side walls of the clamping groove. The movable end of the linear displacement sensor is placed in the clamping groove and fixed by screws.

[0013] Preferably, in order to facilitate the installation of the tooling and not affect the normal movement of the linear displacement sensor, both ends of the transverse sliding column are respectively mounted on the bottom plate through mounting brackets.

[0014] The beneficial effects of the present invention are:

[0015] The present invention connects the power output shaft to the first connecting member, and the first connecting member is connected to the vertical sliding column and can slide vertically, so the vertical stress generated by the power output shaft jumping is eliminated due to the vertical sliding of the first connecting member; the vertical sliding column is connected to the second connecting member, the second connecting member is connected to the linear displacement sensor, and the second connecting member is connected to the transverse sliding column and can slide horizontally, so the transverse stress generated by the power output shaft jumping is eliminated due to the transverse sliding of the second connecting member; In general, the linear displacement sensor life test tooling of the present invention eliminates the transverse stress and vertical stress generated by the power output shaft jumping, and solves the problem that the irregular jumping of the power output shaft of the linear displacement sensor life test equipment during long-term reciprocating motion applies additional stress to the active end of the linear displacement sensor, thereby affecting the test results, and in severe cases damaging the linear displacement sensor and the life test equipment; The linear displacement sensor life test tooling of the present invention is easy to install and debug, and after installation and debugging, the appropriate clamping member can be quickly replaced according to the structural size characteristics of the linear displacement sensor, without the need for overall disassembly and assembly, thereby avoiding the problem of repeated installation and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the tooling for life test of the linear displacement sensor of the present invention;

[0017] Figure 2 yes Figure 1 The structure diagram of the middle AA direction, the proportion in the figure is larger than Figure 1 ;

[0018] Figure 3 yes Figure 1 The cross-sectional structure diagram along the BB direction is larger than Figure 1 . DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] like Figure 1-Figure 3 As shown, the tooling for life test of the linear displacement sensor of the present invention is used to transmit the axial power of the power output shaft 12 with a horizontal axis on the life test equipment to the movable end of the linear displacement sensor 5, including a first connecting member 9, a vertical sliding column 7, a second connecting member 10, a horizontal sliding column 4 and a clamping member 6, one end of the first connecting member 9 is connected to the power output shaft 12, the first connecting member 9 is slidably connected to the vertical sliding column 7 and can and can only slide vertically, the lower end of the vertical sliding column 7 is connected to the upper end of the second connecting member 10, the second connecting member 10 is slidably connected to the horizontal sliding column 4 and can and can only slide horizontally, the upper end of the clamping member 6 is installed on the second connecting member 10, and the lower end of the clamping member 6 is connected to the movable end of the linear displacement sensor 5.

[0021] The first connecting member 9, the second connecting member 10 and the clamping member 6 are all limited in shape and size, and can be used to meet application requirements according to actual needs. Generally, regular shapes such as rectangles are adopted to achieve better balance and stability.

[0022] Figure 1 and Figure 3 The inner wall 1 of the linear displacement sensor life test equipment is also shown, that is, the tooling is installed in the linear displacement sensor life test equipment.

[0023] like Figure 1-Figure 3 As shown, the present invention also discloses the following multiple more optimized specific structures. According to actual needs, the above structure can be superimposed and combined with one or more of the following specific structures to form a more optimized technical solution.

[0024] In order to reduce the sliding friction of the first connecting member 9 sliding on the vertical sliding column 7 and the second connecting member 10 sliding on the transverse sliding column 4, the first connecting member 9 is provided with a vertical through hole and the vertical first linear bearing 8 is installed in the vertical through hole, the first linear bearing 8 is sleeved outside the vertical sliding column 7, the second connecting member 10 is provided with a transverse through hole and the transverse second linear bearing 11 is installed in the transverse through hole, and the second linear bearing 11 is sleeved outside the transverse sliding column 4.

[0025] In order to achieve a more stable transmission effect, there are two vertical sliding columns 7 and two first linear bearings 8, which are respectively located on the laterally symmetrical sides of the power output shaft 12; there are two transverse sliding columns 4 and two second linear bearings 11, which are respectively located on the laterally symmetrical sides of the clamping member 6; the vertical center axis of the clamping member 6 and the transverse center axis of the power output shaft 12 are located in the same vertical plane.

[0026] In order to achieve a more stable connection and transmission effect, the upper surface and one side surface of the second connecting member 10 are provided with installation grooves to form an inverted "L"-shaped groove, and the upper section of the clamping member 6 is inverted "L" shape and is placed in the inverted "L"-shaped groove.

[0027] In order to quickly and stably clamp the movable end of the linear displacement sensor 5, the lower end of the clamping member 6 is provided with a clamping groove with an open lower end, and screw holes are provided on the two side walls of the clamping groove. The movable end of the linear displacement sensor 5 is placed in the clamping groove and fixed by screws.

[0028] In order to facilitate the installation of the tooling and not affect the normal movement of the linear displacement sensor 5 , both ends of the transverse sliding column 4 are respectively mounted on the bottom plate 2 through mounting brackets 3 .

[0029] like Figure 1-Figure 3 As shown, the working principle of the tooling for linear displacement sensor life test of the present invention is as follows:

[0030] After the linear displacement sensor life test equipment is started, the power output shaft 12 reciprocates in the axial direction, driving the first connecting member 9, the vertical sliding column 7, the second connecting member 10, the clamping member 6 and the linear displacement sensor 5 to synchronously reciprocate in the horizontal direction. After reaching the required number of reciprocating times, the linear displacement sensor 5 is detected to see if it is damaged, thereby achieving the purpose of the life test. The power output shaft 12 may produce vibrations during the axial reciprocating motion, and form lateral stress and vertical stress, wherein the vertical stress is eliminated due to the vertical sliding of the first connecting member 9, and the lateral stress is eliminated due to the lateral sliding of the second connecting member 10, ultimately achieving the purpose of eliminating the stress of the power output shaft 12, realizing the protection of the linear displacement sensor 5 and the linear displacement sensor life test equipment, and improving the accuracy of the test results.

[0031] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A tool for life test of a linear displacement sensor, used to transmit the axial power of a power output shaft with a transverse axis on a life test device to the active end of the linear displacement sensor, characterized in that: It includes a first connecting member, a vertical sliding column, a second connecting member, a transverse sliding column and a clamping member, one end of the first connecting member is connected to the power output shaft, the first connecting member is slidably connected to the vertical sliding column and can and can only slide vertically, the lower end of the vertical sliding column is connected to the upper end of the second connecting member, the second connecting member is slidably connected to the transverse sliding column and can and can only slide transversely, the upper end of the clamping member is installed on the second connecting member, and the lower end of the clamping member is connected to the movable end of the linear displacement sensor; the first connecting member is provided with a vertical through hole and a vertical first linear bearing is installed in the vertical through hole, the first linear bearing is sleeved outside the vertical sliding column, the second connecting member is provided with a transverse through hole and a transverse second linear bearing is installed in the transverse through hole The second linear bearing is sleeved outside the horizontal sliding column; the vertical sliding column and the first linear bearing are both two and are respectively located on the horizontally symmetrical sides of the power output shaft, the horizontal sliding column and the second linear bearing are both two and are respectively located on the horizontally symmetrical sides of the clamping member, and the vertical center axis of the clamping member and the horizontal center axis of the power output shaft are located in the same vertical plane; the upper surface and one side surface of the second connecting member are both provided with mounting grooves to form an inverted "L"-shaped groove, and the upper section of the clamping member is in an inverted "L" shape and is placed in the inverted "L"-shaped groove; the lower end of the clamping member is provided with a clamping groove with an opening at the lower end, and screw holes are provided on the two side walls of the clamping groove, and the movable end of the linear displacement sensor is placed in the clamping groove and fixed by screws.

2. The tooling for life test of a linear displacement sensor according to claim 1, characterized in that: Both ends of the transverse sliding column are respectively mounted on the bottom plate through mounting brackets.

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