Test device and test method for buffering damper axial gap error

Abstract

The application relates to a testing device and a testing method for buffering damper axial gap error, characterized by a positioning support compression mechanism which comprises a base and a first seat, a guide support seat, a support seat two and a support seat one which are sequentially fixed on the upper end of the base; the semicircular arc-shaped support surface on the upper end of the support seat two and the support seat one is used for horizontally supporting the buffering damper; the first end positioning baffle of the end positioning compression part is fixed on the right side of the support seat two and is in contact with the right end surface of the outer cylinder assembly of the buffering damper for positioning; the tail end positioning compression mechanism of the end positioning compression part is in threaded connection with the upper part of the tail seat, the right end of the tail end positioning compression mechanism is in compression contact with the left end surface of the outer cylinder assembly of the buffering damper; the power mechanism comprises a connecting piece, a moving cylinder assembly and an electric stretcher which are sequentially connected; the moving cylinder assembly is installed on the horizontal guide round hole of the guide support; the left end of the connecting piece is fixedly connected with the first end shaft sleeve of the buffering precompression core assembly; and the electric stretcher is fixedly installed on the left side of the first seat. The application realizes accurate quantitative detection of the buffering damper axial gap error.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical manufacturing, and particularly relates to a testing device and testing method for axial gap error of a buffer damper. BACKGROUND

[0002] The internal structure of the buffer damper 3 is composed of a buffer pre-tightening core assembly 3-1 and an outer cylinder assembly 3-2, and the design requirement is that the buffer pre-tightening core assembly is tightly attached to the outer cylinder assembly in the axial direction without gap movement. The two end planes of the buffer pre-tightening core assembly are in complete contact with the two end faces of the cylindrical inner cavity formed by the outer cylinder assembly, but the part error and size chain accumulation of the components forming the structure make the buffer pre-tightening core assembly prone to slight movement. The existing experience is difficult to guarantee the effect of the inspection of the axial gap error, even if the phenomenon of movement is checked out, but the amount of movement cannot be detected, and the equipment quality cannot be guaranteed without data support. In order to quantify the data index and standardize the detection process, a kind of axial gap testing process device and testing method expressed by data and capable of realizing quantization is developed and designed to meet the design requirements, improve the quality consciousness and reduce the quality risk. SUMMARY

[0003] The present application is proposed to overcome the deficiencies of the prior art, and provides a testing device and testing method for axial gap error of a buffer damper.

[0004] One of the above-mentioned purposes of the present application is realized by the following technical scheme:

[0005] A kind of axial gap error measuring device for buffer damper, including positioning support compression mechanism, power mechanism and displacement measurement part;The positioning support compression mechanism includes base, tailstock, support seat one, support seat two, guide support, first seat and end positioning compression part;The base is arranged in the lowermost position, the first seat, the guide support, the support seat two, the support seat one and the tailstock are all vertical seats, and are sequentially fixed and installed on the upper end of the base at the set interval from right to left;The upper end of the support seat two and the support seat one is provided with the support surface of semicircular arc shape consistent with the outer surface shape of the outer cylinder assembly of the buffer damper, and the horizontal support of the buffer damper is realized by the two semicircular arc-shaped support surfaces;The upper end of the guide support is provided with horizontal guide round hole along the left-right direction;

[0006] The end positioning and pressing part comprises a head end positioning baffle and a tail end positioning and pressing mechanism; the head end positioning baffle is fixed to the right side of the support seat two, used for positioning and cooperating with the right end surface of the outer cylinder assembly of the buffer damper through contact, and the head end shaft sleeve of the buffer pre-tightening core assembly is extended therefrom; the tail end positioning and pressing mechanism is threadedly connected with the upper part of the tail seat, the right end thereof is in pressing contact with the left end surface of the outer cylinder assembly of the buffer damper, and the axial positioning of the outer cylinder assembly of the buffer damper is realized.

[0007] The power mechanism comprises a adapter, a moving cylinder assembly and an electric stretcher; the moving cylinder assembly is movably installed on the horizontal guide round hole of the guide support in the left-right direction, the moving cylinder assembly is connected between the right end of the adapter and the working end of the electric stretcher, the left end of the adapter is fixedly connected with the head end shaft sleeve of the buffer pre-tightening core assembly, and the electric stretcher is fixedly installed on the left side of the head seat.

[0008] The displacement measuring part adopts a displacement sensor, which is fixedly installed on the upper end of the adapter.

[0009] Moreover, the tail end positioning and pressing mechanism comprises an operating screw rod, a ball shaft neck, a ball gland, a ball seat and a pressing plate; the operating screw rod is connected with the threaded hole on the tail seat, the right end of the operating screw rod is fixedly connected with the left end of the ball shaft neck, and the right end of the ball shaft neck is provided with a ball head; the ball head is rotatably embedded into the ball socket formed by the ball gland and the ball seat, the right end of the ball seat is connected with the pressing plate, and the left end surface of the outer cylinder assembly of the buffer damper is pressed and fitted through the pressing plate.

[0010] Moreover, the moving cylinder assembly comprises a cylinder body, two guide sleeves, a compression spring, a core shaft, an end cover and a pressing nut; the cylinder body is a columnar cylinder body with a limiting surface arranged in the left end and an internal thread arranged in the right end; the core shaft is an axial body structure with a large-diameter end head arranged in the left end, a small-diameter external thread arranged in the right end and a light shaft arranged in the middle part; the guide sleeve is a column sleeve with a central hole and a ring cavity arranged around the periphery.

[0011] The core shaft is arranged in the inner hole of the cylinder body in a right end extending manner, the two guide sleeves are arranged on the core shaft in an opening opposite manner and close to the two ends respectively, the compression spring is arranged on the core shaft, and the two ends of the compression spring are embedded into the ring cavities of the two guide sleeves respectively; the end cover is connected with the internal thread of the right end of the cylinder body through the external thread, the end cover is in pressing contact with the right end port of the right end guide sleeve, and the left end guide sleeve is in pressing contact with the limiting surface of the left end of the cylinder body; the pressing nut is threadedly connected with the external thread segment of the right end of the core shaft and is in pressing contact with the right end surface of the right end guide sleeve, and the end head of the core shaft is in pressing contact with the left end surface of the left end guide sleeve.

[0012] The second of the above purposes of the present application is achieved by the following technical solutions.

[0013] A measurement method using the above-mentioned device for measuring the axial gap error of a buffer damper, comprising the following steps:

[0014] Step 1, first install the buffer damper to be measured on the measuring device;

[0015] Step 2, after the buffer damper is installed in place, start the power supply, so that the electric stretcher is in an elongated state, the core shaft of the moving cylinder assembly is pushed to move left, the compression spring is compressed, the spring force pushes the cylinder body to slide left along the horizontal guide hole of the guide support, the adapter is pushed to move left, and the displacement sensor is driven to move left, after which the displacement sensor displays zero.

[0016] Step 3, adjust the function of the electric stretcher, so that the electric stretcher is in a tensioned state, the core shaft is pulled to move right, the compression spring is pulled to move right, the spring force pushes the cylinder body to slide right along the horizontal guide hole of the guide support, the adapter is pulled to move right, and the displacement sensor is driven to move right, after which the displacement sensor displays a value as the axial error gap of the buffer damper.

[0017] The present application has the advantages and positive effects that:

[0018] The present application realizes horizontal support of the entire buffer damper to be tested and compression and fixation of the two ends of the outer cylinder assembly through the positioning support compression mechanism; through the power mechanism connected with the buffer pre-tightening core assembly of the buffer damper, the buffer pre-tightening core assembly can be driven to move slightly left and right, the slight movement is obtained through the displacement sensor, and accurate quantitative detection of the axial gap error of the buffer damper is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a sectional view of the buffer damper;

[0020] Figure 2 is Figure 1 is a structural schematic view of the buffer pre-tightening core assembly in the present application;

[0021] Figure 3 is Figure 1 is a structural schematic view of the outer cylinder assembly in the present application;

[0022] Figure 4 is a whole structure diagram of the present application for the device for measuring the axial gap error of a buffer damper;

[0023] Figure 5 is a structural diagram of the positioning support compression mechanism of the present application;

[0024] Figure 6is a structural schematic view of a moving cylinder assembly in a power mechanism of the present application. DETAILED DESCRIPTION

[0025] The structure of the present application is further described below in combination with the drawings and by examples. It should be noted that the examples are descriptive rather than limiting.

[0026] An axial gap error measuring device for a buffer damper, please see Figures 4-6 The invention point is that it mainly includes

[0027] Positioning support compression mechanism, power mechanism and displacement measurement part.

[0028] Positioning support compression mechanism:

[0029] For horizontal support of the buffer damper measuring piece 3, the power mechanism and the displacement measurement part, and compression and fixation of the measuring piece at both ends, including support part 1 and end positioning compression part 2. The support part includes base 1-1, tailstock 1-2, support seat one 1-3, support seat two 1-4, guide support 1-5, headstock 1-6. The base is arranged at the lowest position, and the upper end of the base forms a horizontal support table. The headstock, guide support, support seat two, support seat one and tailstock are all vertical seats, and are fixed and installed on the upper end of the base in order from right to left at a set interval. The left side of the headstock is a mounting plane, used to realize the fixed installation of the power source of the power mechanism. The upper end of the guide support is provided with a horizontal guide round hole in the left-right direction, used to realize the installation of the moving cylinder assembly of the power mechanism. The upper end of the support seat two and the support seat one are both semicircular arc structures, and the diameter is consistent with the outer diameter of the outer cylinder assembly of the buffer damper. The support seat one and the support seat two together play a supporting role, and are a supporting point of the buffer damper; the support seat two plays a supporting role, and is another supporting point of the buffer damper, realizing horizontal support of the buffer damper through the two supporting points. The upper end of the tailstock is provided with a threaded hole for connecting the end positioning compression part.

[0030] The end positioning and pressing part 2 comprises a head end positioning baffle 2-6 and a tail end positioning and pressing mechanism. The head end positioning baffle 2-6 is fixed to the right side of the support seat two, and through the contact with the front end face of the head end cover of the outer cylinder assembly, the right end face of the buffer damper outer cylinder assembly is positioned and stopped. And a positioning groove is arranged at the upper end of the head end positioning baffle, and the head end shaft sleeve of the buffer pre-tightening core assembly is extended. The tail end positioning and pressing mechanism comprises an operating screw 2-1, a ball shaft neck 2-2, a ball gland 2-3, a ball seat 2-4 and a pressing plate 2-5. The operating screw is connected with the threaded hole on the tail seat, and the movement of the operating screw is realized through the screw transmission. The function of the operating screw is to realize the left and right movement of the operating screw by rotating the left handle. The right end of the operating screw is connected with the ball shaft neck, and the left and right movement of the ball shaft neck is realized. The ball head is arranged at the right end of the ball shaft neck, and the ball head of the ball shaft neck, the ball gland and the ball seat are connected to form a ball hinge. The ball shaft neck is connected with the operating screw for positioning, the ball gland and the ball seat are rotated within a certain range, the right end of the ball seat is connected with the pressing plate, and the left end face of the buffer damper outer cylinder assembly is pressed through the pressing plate.

[0031] Power mechanism:

[0032] The power mechanism is mainly composed of a connecting piece 5, a moving cylinder assembly 6 and an electric stretcher 7. The moving cylinder assembly is composed of a cylinder body 6-1, two guide sleeves 6-2 and 6-4, a compression spring 6-3, a core shaft 6-7, an end cover 6-5 and a pressing nut 6-6. The cylinder body is a columnar cylinder body with a limiting surface arranged at the left end and an internal thread arranged at the right end. The core shaft is an axle body structure with a large-diameter end head arranged at the left end, a small-diameter external thread arranged at the right end and a light shaft arranged at the middle part. The guide sleeve is a column sleeve with a central hole and a ring cavity arranged at the periphery. The end cover is a disc-shaped cover with a central hole arranged inside and an external thread arranged at the outer ring.

[0033] The core shaft is arranged in the inner hole of the cylinder body in a right-end extending manner, the two guide sleeves are arranged on the core shaft in an opening-opposite manner and close to the two ends, respectively, and the compression spring is arranged on the core shaft, and the two ends of the compression spring are embedded in the ring cavities of the two guide sleeves, respectively. The end cover is connected to the internal thread at the right end of the cylinder body through the external thread, the right end port of the end cover and the right end port of the guide sleeve at the right end are in pressing contact, and the left end port of the guide sleeve and the limiting surface at the left end of the cylinder body are in pressing contact. The pressing nut is in threaded connection with the external thread segment at the right end of the core shaft, and the right end surface of the guide sleeve at the right end is in pressing contact, so that the end head of the core shaft and the left end surface of the guide sleeve at the left end are in pressing contact, forming a cylinder moving cylinder assembly, which plays a functional protection role in work, limits the tension value and realizes the function of stretching within a limited range. The moving cylinder assembly is integrally arranged in the horizontal guide round hole at the upper end of the guide support in a left and right movable manner.

[0034] The right end of the core shaft of the moving cylinder assembly is connected with the working end of the electric stretcher, which is fixedly installed on the installation plane of the first base. The left end of the adapter is fixedly connected with the first end sleeve of the buffer pre-tightening core assembly, and the right end of the adapter is fixedly connected with the left end of the cylinder body of the moving cylinder assembly.

[0035] The displacement measuring part:

[0036] The displacement sensor 4 is fixedly installed on the upper end of the adapter.

[0037] The measuring method of the device for measuring the axial gap error of the buffer damper is as follows:

[0038] Step 1: First, install the buffer damper to be measured on the measuring device;

[0039] Step 2: After the buffer damper is installed in place, start the power supply, so that the electric stretcher is in the elongated state, the core shaft of the moving cylinder assembly is pushed to move left, the compression spring is compressed, the spring force pushes the cylinder body to slide left along the horizontal guide hole of the guide support, the adapter is pushed to move left, and the displacement sensor is driven to move left, and then the displacement sensor displays zero.

[0040] Step 3: Adjust the function of the electric stretcher, so that the electric stretcher is in the tension state, the core shaft is pulled to move right, the compression spring is pulled to move right, the spring force pushes the cylinder body to slide right along the horizontal guide hole of the guide support, the adapter is pulled to move right, and the displacement sensor is driven to move right, and then the displacement sensor displays the value of the axial error gap of the buffer damper. In step 2, the total displacement amount △X1 of the sensor to the left can be obtained according to Hooke's law:

[0041] △X1=F1 / K

[0042] In the formula, F1 is the thrust of the electric stretcher, and K is the spring stiffness coefficient of 3-6.

[0043] In step 3, the total displacement amount △X2 of the sensor to the right can be obtained according to Hooke's law:

[0044] △X2=F2 / K

[0045] In the formula, F2 is the thrust of the electric stretcher, and K is the spring stiffness coefficient of 3-6.

[0046] The total movement displacement amount △X of the displacement sensor can be obtained by superimposing the above two displacement amounts:

[0047] △X=△X1+△X2=(F1+ F2) / k

[0048] Because the displacement sensor is zeroed at the leftmost end, the displacement and force in the above formulas are all scalars.

[0049] Although the embodiments of the present application and the drawings disclose the present application for illustrative purposes, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, and therefore the scope of the present application is not limited to the disclosed embodiments and drawings.

Claims

1. A device for measuring axial clearance error of a buffer damper, characterized in that: The device includes a positioning support and clamping mechanism, a power mechanism, and a displacement measurement section. The positioning support and clamping mechanism includes a base, a tail seat, a first support seat, a second support seat, a guide support, a first seat, and an end positioning and clamping section. The base is located at the bottom. The first seat, guide support seat, second support seat, first support seat, and tail seat are all uprights and are fixedly installed on the upper end of the base from right to left at a set interval. The upper ends of the second support seat and the first support seat are provided with semi-circular arc-shaped support surfaces that match the shape of the outer surface of the outer cylinder assembly of the buffer damper. The horizontal support of the buffer damper is achieved through the two semi-circular arc-shaped support surfaces. The upper end of the guide support is provided with a horizontal guide hole in the left-right direction. The end positioning and clamping part includes a front end positioning baffle and a rear end positioning and clamping mechanism; the front end positioning baffle is fixed to the right side of the support base and is used to form a positioning fit with the right end face of the outer cylinder assembly of the buffer damper through contact, and to allow the front end bushing of the buffer pre-tightening core assembly to extend out; the rear end positioning and clamping mechanism is threaded to the upper part of the tail seat, and its right end is pressed into contact with the left end face of the outer cylinder assembly of the buffer damper to realize the axial limit of the outer cylinder assembly of the buffer damper; The power mechanism includes an adapter, a movable cylinder assembly, and an electric tensioner; the movable cylinder assembly is installed in a horizontal guide hole on the guide support in a left-right movable manner; the movable cylinder assembly is connected between the right end of the adapter and the working end of the electric tensioner; the left end of the adapter is fixedly connected to the first end bushing of the buffer pre-tightening core assembly; and the electric tensioner is fixedly installed on the left side of the first support. The displacement measurement section uses a displacement sensor, which is fixedly installed on the upper end of the adapter.

2. The device for measuring axial clearance error of a buffer damper according to claim 1, characterized in that: The tail end positioning and clamping mechanism includes an operating screw, a ball bearing journal, a ball cap, a ball seat, and a clamping plate. The operating screw is connected to a threaded hole on the tail seat. The right end of the operating screw is fixedly connected to the left end of the ball bearing journal. A ball head is provided at the right end of the ball bearing journal. The ball head is rotatably embedded in a ball socket formed by the ball cap and the ball seat. The right end of the ball seat is connected to the clamping plate. The clamping plate achieves the fitting and clamping of the left end face of the buffer damper outer cylinder assembly.

3. The device for measuring axial clearance error of a buffer damper according to claim 2, characterized in that: The movable cylinder assembly consists of a cylinder body, two guide sleeves, a compression spring, a spindle, an end cap, and a clamping nut. The cylinder body is a cylindrical cylinder with a limiting surface inside the left end and an internal thread on the right end. The spindle is a shaft structure with a large-diameter end on the left end, a small-diameter external thread on the right end, and a smooth shaft in the middle. The guide sleeve is a cylindrical sleeve with a central hole and an annular cavity on the periphery. The end cap is a disc-shaped cap with a central hole inside and an external thread on the outer ring. The mandrel extends from its right end and is inserted into the inner bore of the cylinder. The two guide sleeves are fitted onto the mandrel with their openings facing each other, near the two ends respectively. The compression spring is fitted onto the mandrel, with its two ends embedded in the annular cavities of the two guide sleeves. The end cap is connected to the internal thread at the right end of the cylinder via an external thread. The end cap presses against the right end of the guide sleeve, causing the left guide sleeve to press against the limiting surface at the left end of the cylinder. The clamping nut forms a threaded connection with the external thread section at the right end of the mandrel and presses against the right end face of the guide sleeve, causing the end of the mandrel to press against the left end face of the guide sleeve.

4. A measurement method using the axial clearance error measuring device for a buffer damper as described in claim 3, characterized in that, Includes the following steps: Step 1: First, install the buffer damper to be measured on the measuring device; Step 2: After the buffer damper is installed in place, turn on the power to put the electric tensioner in the extended state, push the core axis of the moving cylinder assembly to move to the left, compress the compression spring, and the compression spring force pushes the cylinder body to slide to the left along the horizontal guide hole of the guide support, pushes the adapter to move to the left, and drives the displacement sensor to move to the left. After that, the displacement sensor displays zero. Step 3: Adjust the function of the electric tensioner to put it in the tensioned state. Pull the mandrel to the right, pull the compression spring to the right, and the spring force pushes the cylinder to slide to the right along the horizontal guide hole of the guide support. Pull the adapter to the right, and after the displacement sensor moves to the right, the value displayed by the displacement sensor is the axial error clearance of the buffer damper.

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