CN103698111A - Linear and torsional fatigue test fixture for pipe bush - Google Patents

Abstract

The invention relates to a linear and torsional fatigue test tool for a tubular bush, which includes a base plate, a connecting rod and a bearing fixing seat. A support block is installed and fixed on one end surface of the base plate, and a base is installed and fixed on the upper end surface of the other side. A pair of bearing fixing seats are installed side by side on the upper end of the base, and a slide rail is installed on the upper end of the support block. , the connecting rod is rotatably connected with the rocker arm installed between the upper end of the bearing fixing seat, the tubular bush on the rotating shaft is butt clamped by two clamping blocks arranged on both sides of the rotating shaft, and the lower end of the clamping block is slidingly installed on the on the rails on the base. The device of the invention combines two kinds of fatigue tests into the same device, which greatly shortens the detection time and has better detection effect.

Description

A linear and torsional fatigue test tool for tubular bushings

technical field

The invention relates to the field of production equipment testing of mechanical parts, in particular to a straight line and torsion fatigue testing tool for a tubular bush.

Background technique

Tubular bushing parts are often used in mechanical parts, especially in automobile parts. These parts are often installed in key parts of automobiles. Fatigue testing of tubular bushing parts is required during production and processing.

The fatigue test of tubular bushing parts includes linear compression test and torsional fatigue test. The existing test method is to separate the two test methods and use two different detection devices. Because the fatigue test needs to be repeated tens of thousands of times The same action, so the detection time is longer, and the two-step detection is very time-consuming, affecting the production progress of the product, and it is impossible to test the fatigue degree of the product under the state of linear pressure and torsional force at the same time.

Contents of the invention

The technical problem to be solved by the present invention is to provide a linear and torsional fatigue test tool for tubular bushings, which combines the two fatigue tests into the same device, which greatly shortens the detection time and has better detection results.

The technical solution adopted by the present invention to solve the technical problem is to provide a linear and torsional fatigue test tool for tubular bushings, including a bottom plate, a support block, a connecting rod and a bearing fixing seat, and the upper end surface of one side of the bottom plate is A support block is installed and fixed, and a base is installed and fixed on the upper end surface of the other side. A pair of bearing fixing seats are installed side by side on the upper end of the base, and a slide rail is installed horizontally on the upper end of the support block. A sliding connecting seat, the outer wall of the connecting seat is connected with the power connector, the upper end of the inner wall is equipped with a rotating shaft seat, and the rotating shaft seat is rotatably connected with one end of the connecting rod, and the connecting rod is connected with the bearing fixed seat The rocker arm between the upper ends is rotatably connected. One end of the rocker arm is rotatably connected to a bearing holder, and the other end is rotatably connected to another bearing holder through a rotating shaft. The tubular bush on the rotating shaft is formed by Two clamping blocks arranged on both sides of the rotating shaft are docked and clamped, the lower ends of the clamping blocks are slidably installed on the slide rails on the base, and the power connectors are connected to the side walls of the clamping blocks located outside.

Both the connecting seat and the lower end of the clamping block are connected with the sliding rail through the sliding block.

The two ends of the connecting rod are respectively connected with the rotating shaft seat and the rocker arm through fisheye joints.

The clamping block is in the shape of "2", and a semicircular notch is formed on the side of the butt joint, and a through hole matching the pipe bushing is formed in the middle of the semicircle notch after butt joint.

The rotating shaft includes a bush socket, a stop ring is arranged on one side of the bush socket, a rocker connecting column is arranged on one side of the stop ring, and the other end of the bush socket is connected with a plug Connect the rotating shaft, the plug-in rotating shaft is inserted into the bearing fixing seat and connected with the bearing, one end of the plug-in rotating shaft is arranged with a threaded part and connected with a limit nut, the connecting post of the rocker arm is inserted into the rocker arm, and the connecting post and the rocker arm There is no relative rotation between them.

The upper end of the rocker arm is centered with a rectangular connecting groove, and a rotating pin is fixed in the rectangular connecting groove, and the rotating pin is connected with the fisheye joint at one end of the connecting rod. The connecting hole of the rotating shaft that matches the shape of the connecting column of the arm is connected to the side wall on the opposite side with an insertion shaft, and a screw hole communicating with the connecting hole of the rotating shaft is opened inside the insertion shaft, and the insertion shaft is inserted into the insertion rotating shaft It is connected with the bearing, and a fixing screw is inserted from the outside in the screw socket, and the fixing screw is connected with the connecting column of the rocker arm.

The connecting column of the rocker arm is in the form of a four-sided cylinder, wherein one set of opposite surfaces is an arc surface, and the other set of opposite surfaces is an oblique cone surface.

The outer side of the plug-in rotating shaft is sleeved with a clamping sleeve, and one end surface of the clamping sleeve and the end surface of the retaining ring clamp the pipe bushing together, and the end surface in contact with the pipe bushing is along the Anti-slip protrusions are evenly arranged on the circumference.

The power connector is connected to an external air cylinder or oil cylinder, and both ends of the slide rail are equipped with limit stops whose upper ends are higher than the upper surface of the slide rail.

The rotation angle of the rocker arm is less than 180°.

When testing, connect the pipe bushing to the bushing socket of the rotating shaft, one side is in close contact with the non-slip side of the retaining ring, and the other side is in close contact with the non-slip side of the clamping sleeve, and then use two clamping blocks Clamp and fix the pipe bushing, and the power connector connected to the connecting seat starts to move, driving the connecting seat to slide back and forth along the slide rail, and the rocker arm moves in a certain position through the sliding of the connecting seat and the cooperation of the connecting rod and the fisheye joint. Repeated rotary motion within the angle, the rotation of the rocker arm drives the rotation of the rotary shaft, thereby exerting torsional force on the pipe bushing.

While the above-mentioned rocker arm is rotating, the power connector connected to the clamping block also starts to move, driving the clamping block to make linear and repeated movements along the slide rail, and radially and linearly squeeze the pipe bushing, so that the pipe can be tested. The fatigue strength of the bushing under linear compression and torsional force.

Beneficial effect

The invention relates to a linear and torsional fatigue test tool for tubular bushings. The linear motion can be converted into rotational motion through a connecting rod and a rocker arm, and the linear and torsional fatigue tests are combined into the same device, which greatly shortens the testing time. time, and can detect the fatigue of parts under the state of two pressures applied at the same time, with better detection effect.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is a front view structural diagram of the present invention;

Fig. 3 is the schematic diagram of the half-section structure of the front view of the present invention;

Fig. 4 is a side sectional view of the present invention;

Fig. 5 is a top view structure diagram of the present invention;

Fig. 6 is a structural diagram of a clamping block according to the present invention;

Fig. 7 is a half-sectional structure diagram of the rocker arm according to the present invention;

Fig. 8 is a three-dimensional structure diagram of the rocker arm according to the present invention;

Fig. 9 is a front structural view of the rotating shaft according to the present invention;

Fig. 10 is a right view structural view of the rotating shaft according to the present invention;

Fig. 11 is a left structural diagram of the rotating shaft according to the present invention.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

As shown in Figures 1-11, the embodiment of the present invention relates to a linear and torsional fatigue test tool for tubular bushings, including a base plate 1, a support block 2, a connecting rod 9 and a bearing fixing seat 14, the base plate 1 A support block 2 is installed and fixed on the upper end surface of one side, and a base 13 is installed and fixed on the upper end surface of the other side. Rail 8, the upper end of the slide rail 8 is equipped with a slidable connecting seat 6, the outer wall of the connecting seat 6 is connected with the power connector 5, and the upper end of the inner wall is equipped with a rotating shaft seat 7, which is connected to the One end of the rod 9 is rotatably connected, and the connecting rod 9 is rotatably connected with the rocker arm 10 installed between the upper ends of the bearing holders 14. One end of the rocker arm 10 is rotatably connected with a bearing holder 14, and the other end is passed through The rotating shaft 19 is rotatably connected with another bearing fixing seat 14, and the tubular bushing 20 on the rotating shaft 19 is butt-clamped by two clamping blocks 11 arranged on both sides of the rotating shaft 19. The clamping blocks The lower end of 11 is slidably installed on the slide rail 8 on the base 13, and the power connector 5 is connected to the side wall of the clamp block 11 located on the outside.

Both the connecting base 6 and the lower end of the clamping block 11 are connected to the sliding rail 8 through the sliding block 3 .

The two ends of the connecting rod 9 are respectively connected with the rotating shaft seat 7 and the rocker arm 10 through the fisheye joint 15 .

The clamp block 11 is in the shape of a "2", and a semicircular notch 110 is formed on its butt joint side, and a through hole matching the pipe bushing 20 is formed in the middle of the semicircular notch 110 after butt joint.

The rotating shaft 19 includes a bush socket portion 190, a stop ring 193 is arranged on one side of the bush socket portion 190, a rocker connecting column 192 is arranged on one side of the stop ring 193, and the bush socket portion The other end of 190 is connected with a plug-in rotating shaft 194, which is inserted into the bearing holder 14 and connected with the bearing 16, and one end of the plug-in rotating shaft 194 is arranged with a threaded part 195 and is connected with a stop nut, and the rocker arm The connecting post 192 is inserted into the rocker arm 10 , and there is no relative rotation between the connecting post 192 and the rocker arm 10 .

The upper end of the rocker arm 10 is centered with a rectangular connecting groove 101, and a rotating pin is fixed in the rectangular connecting groove 101. The rotating pin is connected with the fisheye joint 15 at one end of the connecting rod 9. The lower end of the rocking arm 10 A shaft connection hole 100 matching the shape of the rocker arm connection post 192 is opened on one side, and an insertion shaft 102 is connected to the side wall on the opposite side, and a screw insertion hole 103 communicating with the shaft connection hole 100 is opened inside the insertion shaft 102 , the insertion shaft 102 is inserted into the insertion shaft 194 and connected to the bearing 16 , and a fixing screw 17 is inserted into the screw insertion hole 103 from the outside, and the fixing screw 17 is connected to the rocker arm connecting column 192 .

The rocker arm connecting column 192 is in the form of a four-sided cylinder, wherein one set of opposite surfaces is an arc surface, and the other set of opposite surfaces is an oblique cone surface.

A clamping sleeve 18 is sleeved on the outside of the plug-in rotating shaft 194, and one end surface of the clamping sleeve 18 and the end surface of the retaining ring 193 clamp the pipe bushing 20 together, and are in contact with the pipe bushing 20. Anti-slip protrusions 191 are uniformly arranged along the circumference on the end faces of each.

The power connector 5 is connected to an external cylinder or an oil cylinder, and both ends of the slide rail 8 are equipped with a limit stopper 4 , the upper end of the limit stopper 4 is higher than the upper surface of the slide rail 8 .

The rotation angle of the rocker arm 10 is less than 180°.

When testing, the pipe bushing 20 is sleeved on the bushing socket 190 of the rotating shaft 19, one side is in close contact with the non-slip side of the retaining ring 193, and the other side is in close contact with the non-slip side of the clamping sleeve 18, Then use two clamping blocks 11 to clamp and fix the pipe bushing 20, and the power connector 5 connected to the connecting seat 6 starts to move, driving the connecting seat 6 to slide back and forth along the slide rail 8, through the sliding and connecting of the connecting seat 6 The cooperation between the rod 9 and the fish-eye joint 15 makes the rocker arm 10 rotate repeatedly within a certain angle, and the rotation of the rocker arm 10 drives the rotating shaft 19 to rotate, thereby exerting torsion force on the pipe bushing 20 .

While the above-mentioned rocker arm 10 is rotating, the power connector 5 connected to the clamp block 11 also starts to move, driving the clamp block 11 to make a linear and repeated movement along the slide rail 8, and to perform a radial linear extrusion action on the pipe bushing 20 , so that the fatigue strength of the tubular bushing 20 under linear compression and torsional force can be tested.

The size of the rotating shaft 19 and the clamping block 11 can be replaced according to the pipe bushing 20 of different sizes, and the power connector 5 connected to the clamping block 11 and the connecting seat 6 can be controlled through the same hydraulic circuit or pneumatic circuit to ensure Synchronization of its actions.

The rotation angle of the rocker arm 10 can be increased by lengthening the length of the rocker arm 10 and the length of the connecting rod 9 .

Claims (10)

1. A linear and torsional fatigue test tool for tubular bushings, including a base plate (1), a support block (2), a connecting rod (9) and a bearing holder (14), characterized in that the base plate ( 1) A support block (2) is installed and fixed on the upper end surface of one side, and a base (13) is installed and fixed on the upper end surface of the other side, and a pair of bearing fixing seats (14) are installed side by side on the upper end of the base (13). The upper end of the support block (2) is horizontally installed with a slide rail (8), and the upper end of the slide rail (8) is installed with a slidable connecting seat (6), and the outer wall of the connecting seat (6) is connected to the power The head (5) is connected, and the upper end of the inner wall is equipped with a rotating shaft seat (7), which is rotationally connected with one end of the connecting rod (9), and the connecting rod (9) is installed on the bearing fixing seat ( 14) The rocker arm (10) between the upper ends is rotatably connected, one end of the rocker arm (10) is rotatably connected to a bearing holder (14), and the other end is connected to another bearing holder ( 14) Rotational connection, the pipe bushing (20) on the rotating shaft (19) is butt clamped by two clamping blocks (11) arranged on both sides of the rotating shaft (19), and the clamping block The lower end of (11) is slidably installed on the slide rail (8) on the base (13), and the power connector (5) is connected to the side wall of the clamp block (11) located on the outside. 2. A linear and torsional fatigue test tool for tubular bushings according to claim 1, characterized in that: the lower ends of the connecting seat (6) and the clamping block (11) both pass through the slider (3) Connect with slide rail (8). 3. A linear and torsional fatigue test tool for tubular bushings according to claim 1, characterized in that: the two ends of the connecting rod (9) are connected to the shaft seat ( 7) Connect with rocker arm (10). 4. A linear and torsional fatigue test tool for tubular bushings according to claim 1, characterized in that: the clamp block (11) is in the shape of a "2", and a semicircular notch is opened on the butt side (110), the middle part of the semicircular notch (110) forms a through hole matched with the pipe bushing (20) after butt joint. 5. A linear and torsional fatigue test tool for tubular bushings according to claim 1, characterized in that: the rotating shaft (19) includes a bushing socket (190), and the bushing socket ( 190) is arranged with a retaining ring (193), one side of the retaining ring (193) is arranged with a rocker connecting column (192), and the other end of the bush socket (190) is connected with a plug-in shaft (194), the plug-in shaft (194) is inserted into the bearing holder (14) and connected to the bearing (16), and one end of the plug-in shaft (194) is arranged with a threaded part (195) and connected with a limit nut, the The rocker arm connecting post (192) is inserted in the rocking arm (10), and there is no relative rotation between the connecting post (192) and the rocking arm (10). 6. A linear and torsional fatigue test tool for tubular bushings according to claim 1 or 5, characterized in that: the upper end of the rocker arm (10) is centered with a rectangular connecting groove (101), the A rotating pin is fixed in the rectangular connecting groove (101), and the rotating pin is connected with the fisheye joint (15) at one end of the connecting rod (9). (192) A rotating shaft connection hole (100) with a matching shape, and an insertion shaft (102) connected to the side wall on the opposite side. The insertion shaft (102) has a screw socket connected to the rotation shaft connection hole (100) inside (103), the insertion shaft (102) is inserted into the insertion shaft (194) and connected with the bearing (16), and a fixing screw (17) is inserted into the screw insertion hole (103) from the outside, the The fixing screw (17) is connected with the rocker connecting post (192). 7. A linear and torsional fatigue test tool for tubular bushings according to claim 5, characterized in that: the rocker arm connecting column (192) is a four-sided cylinder, and one set of opposite surfaces is a circular arc face, and the other set of opposite faces are oblique cone faces. 8. A linear and torsional fatigue test tool for tubular bushes according to claim 5, characterized in that: a clamping sleeve (18) is sleeved on the outer side of the plug-in rotating shaft (194), the One end face of the clamping sleeve (18) and the end face of the retaining ring (193) clamp the pipe bushing (20) together, and the end faces in contact with the pipe bushing (20) are uniformly arranged with non-slip surfaces along the circumference. protrusions (191). 9. A linear and torsional fatigue test tool for tubular bushings according to claim 1, characterized in that: the power connector (5) is connected to an external cylinder or oil cylinder, and the slide rail ( Both ends of 8) are equipped with a limit block (4), and the upper end of the limit block (4) is higher than the upper end surface of the slide rail (8). 10. The linear and torsional fatigue test tool for tubular bushings according to claim 1, characterized in that: the rotation angle of the rocker arm (10) is less than 180°.

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