CN201319005Y - Diaphragm spring tester - Google Patents

Abstract

The utility model relates to a testing mechanism for a diaphragm spring of a clutch of an automobile, specifically, a diaphragm spring testing machine capable of effectively measuring force and deformation and detecting its load characteristics, comprising a fuselage bottom plate, a nut, a workbench, a lower die, an upper die, an upper fuselage plate, an intermediate bed plate and a ball screw, wherein the fuselage bottom plate, the intermediate bed plate and the upper fuselage plate are connected through a column, the ball screw is mounted on the fuselage bottom plate and penetrates through the fuselage bottom plate to be connected with a driving device, a sleeve is provided on the nut threadedly connected with the ball screw, the rotating pair of the ball screw forms an upper and lower moving pair of the sleeve through the threaded connection between the ball screw and the nut, the other end of the sleeve passes through the intermediate bed plate and is connected with the workbench, a lower die is installed on the workbench, an upper die is mounted on the upper fuselage plate and is located above the lower die, and a pressure sensor in contact with the upper die is provided on the upper fuselage plate. The utility model has the advantages of high efficiency, high precision, high rigidity, reversibility and the like.

Description

Diaphragm Spring Testing Machine

technical field

The utility model relates to a testing mechanism for a diaphragm spring of an automobile clutch, in particular to a diaphragm spring testing machine capable of effectively measuring force and deformation and detecting its load characteristics.

Background technique

Diaphragm springs are widely used in cars, light and medium trucks due to their small axial size, simple structure, unique elastic characteristics, and labor-saving operation. The performance of the diaphragm spring of the automobile clutch is one of the key technologies to reflect the quality of the clutch. In order to ensure the working performance of the clutch, it is very important to test the load characteristics of the diaphragm spring during the production process.

Existing devices for detecting diaphragm springs are mainly driven by a hydraulic system to realize the working process of pressure and position testing. However, due to the low precision of the position control of the hydraulic system during the process of driving the lower mold to rise, the hydraulic valve has a time delay after receiving the work command, resulting in a large error in the detection device; Diaphragm springs are tested, and the maximum diameter of the diaphragm springs that can be detected at present can only reach about 200mm.

In addition, in the existing detection device, the upper die is prone to generate lateral force during the working process, which further reduces the accuracy of pressure measurement.

Utility model content

In order to solve the above existing problems, the purpose of this utility model is to provide a diaphragm spring testing machine with high testing accuracy.

Another purpose of the utility model is to provide a diaphragm spring testing machine with high testing efficiency and large testing range.

The purpose of this utility model is achieved through the following technical solutions:

The utility model comprises a fuselage bottom plate, a screw nut, a workbench, a lower die, an upper die, an upper plate of the fuselage, a middle bed plate and a ball screw, and the fuselage bottom plate, the middle bed plate and the upper plate of the fuselage are connected through columns, The ball screw is installed on the bottom plate of the fuselage, and passes through the bottom plate of the fuselage to connect with the driving device. The threaded connection forms the up and down movement pair of the sleeve. The other end of the sleeve passes through the middle bed plate and connects with the worktable. , There is a pressure sensor in contact with the upper mold on the upper plate of the fuselage.

Among them: the sleeve is in the shape of an inverted "T", the bottom is a cover plate connected with the screw nut, there are a plurality of guide posts on the cover plate, and the second guide sleeve corresponding to the sleeve and the middle bed plate are provided. A plurality of first guide sleeves corresponding to the guide pillars, the guide pillars are passed through the first guide bushes to connect with the workbench, and the sleeves are passed through the second guide bushes to connect with the workbench; the upper die and the lower die are pressed together Steel balls are provided on the outer edge of the butterfly diaphragm spring; nylon stoppers are provided on the lower part of the middle bed plate and the periphery of the second guide sleeve, and the nylon stoppers are on the movement track of the cover plate; There is a proximity switch seat, the upper and lower ends of the proximity switch seat are respectively equipped with proximity switches, and the side of the cover plate close to the proximity switch seat is provided with a block corresponding to the proximity switch; There is a measuring head corresponding to the main ruler; the upper mold is equipped with a handle seat, and a plurality of ball splines are arranged on the upper plate of the fuselage, and the other end of the ball spline is connected with the handle seat of the upper die; the pressure sensor Go through the upper mold handle and contact the upper mold; the pressure sensor and the ball spline are each three, and the upper mold handle is evenly distributed with three first holes for the pressure sensor to pass through and three for the ball spline. The second hole through which the key passes, the first hole and the second hole are arranged alternately; the driving device is composed of a motor, a first pulley, a belt and a second pulley, the motor is installed on the bottom plate of the fuselage, and the output shaft of the motor is controlled by the machine. The bottom plate of the body passes through and is provided with a second pulley; the ball screw passes through the bottom plate of the fuselage and is provided with a first pulley, and the first pulley is driven by a belt and the second pulley; the second pulley is equipped with Compression plate at the end.

Advantage and positive effect of the present utility model are:

1. The utility model is driven by ball screw and screw nut thread connection, which has the characteristics of high efficiency, high precision, high rigidity, reversibility, etc., and can realize slow feed and pressurization and fast return to the initial position.

2. The motor drives the ball screw to rotate, and it can feed rapidly during the rising process, improving the testing efficiency.

3. Due to the high test accuracy of the utility model, the maximum diameter of the testable diaphragm spring can reach 400mm.

4. Nylon stoppers and proximity switches are installed, which have a strong limit function and can prevent excessive travel of the lower die from causing damage to the equipment.

5. The upper mold of the utility model is connected by a ball spline, and the testing machine has a compact structure, which can bear a large load, prevent the generation of lateral force, and further improve the accuracy of the testing machine.

6. In the utility model, steel balls are arranged on the outer edge of the butterfly diaphragm spring pressed by the upper and lower molds. Because of the rolling friction between the steel ball and the diaphragm spring, the sensitivity, precision and durability of the testing machine are improved. .

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the structural representation of upper mold handle seat in Fig. 1;

Fig. 4 is a partial enlarged view of place A in Fig. 1;

Fig. 5 is a partial enlarged view of place B in Fig. 1;

Fig. 6 is a flowchart of the utility model control system;

Among them: 1 is the bottom plate of the fuselage, 2 is the column, 3 is the nut, 4 is the motor, 5 is the guide post, 6 is the first guide sleeve, 7 is the nylon stopper, 8 is the workbench, 9 is the lower mold, 10 11 is the upper mold, 12 is the handle seat of the upper mold, 13 is the pressure sensor, 14 is the connecting plate, 15 is the ball spline, 16 is the upper plate of the fuselage, 17 is the second guide sleeve, 18 is the middle Bed plate, 19 is the sleeve, 20 is the ball screw, 21 is the main ruler, 22 is the cover plate, 23 is the measuring head, 24 is the first pulley, 25 is the belt, 26 is the pressing plate, 27 is the second pulley , 28 is a proximity switch, 29 is a block, 30 is a proximity switch seat, 31 is a first hole, and 32 is a second hole.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Fig. 1 and Fig. 2, the utility model comprises a fuselage bottom plate 1, a screw nut 3, a workbench 8, a lower die 9, an upper die 11, a fuselage upper plate 16, an intermediate bed plate 18 and a ball screw 20, The fuselage bottom plate 1, the middle bed plate 18 and the fuselage upper plate 16 are connected through the column 2. The ball screw 20 is installed on the fuselage bottom plate 1 and pierced through the fuselage bottom plate 1. The threaded end of the ball screw 20 is The key is connected with a first pulley 24; the fuselage base plate 1 is also provided with a motor 4, and the output shaft of the motor 4 is passed through the fuselage base plate 1, and the output end key of the output shaft is connected with a second pulley 27. Pulleys 24, 27 are connected and driven by belt 25; second pulley 27 is provided with a hold-down plate 26 fixedly connected to the end of the output shaft of the motor, which can further support the motor 4 and prevent the motor 4 from moving up and down. The screw nut 3 is threaded on the ball screw 20, and the sleeve 19 is arranged on the screw nut 3. The rotating pair of the ball screw 20 can change the vertical movement of the sleeve 19 through the threaded connection between the ball screw 20 and the screw nut 3. Vice; the sleeve 19 is in the shape of an inverted "T", and the bottom is a cover plate 22 fixedly connected with the nut 3. 19 corresponding to the second guide sleeve 17 and the surrounding of the second guide sleeve 17 are provided with four first guide sleeves 6 corresponding to the guide post 5, and the guide post 5 passes through the first guide sleeve 6 and is in contact with the workbench 8. Connect, sleeve 19 passes through and is connected with workbench 8 by second guide sleeve 17, can guarantee that workbench 8 and lower mold 9 keep stable in the process of moving up and down, and lower mold 9 is installed on workbench 8. The upper mold 11 is installed on the fuselage upper plate 16 and is positioned above the lower mold 9; the upper mold 11 is provided with an upper mold handle seat 12, as shown in Figure 3, the fuselage upper plate 16 is provided with three ball splines 15. The other end of the ball spline 15 is connected to the upper mold handle seat 12; three pressure sensors 13 are also arranged on the fuselage upper plate 16, and the pressure sensors 13 pass through the upper die handle seat 13 and are in contact with the upper die 11. Three first holes 31 through which the pressure sensor 13 passes and three second holes 32 through which the ball spline 15 passes are evenly distributed on the upper mold handle 13, the first holes 31 and the second holes 32 are alternately arranged, The ball splines 15 and the pressure sensors 13 are also arranged alternately, so that the testing machine has a compact structure, can bear a relatively large load, prevents the generation of lateral force, and improves the accuracy of the testing machine. As shown in Fig. 4 and Fig. 5, steel balls 10 are arranged on the outer edge of the upper die 11 and the lower die 9 to compress the butterfly diaphragm spring, and the steel balls 10 are uniformly distributed. There is rolling friction between them, which improves the sensitivity, precision and durability of the testing machine. Nylon block 7 is provided on the lower part of the middle bed plate 18 and the periphery of the second guide sleeve 17 , and the nylon block 7 is on the movement track of the cover plate 22 . The middle bed plate 18 is provided with a proximity switch seat 30, the upper and lower ends of the proximity switch seat 30 are respectively provided with a proximity switch 18, and the side of the cover plate 22 close to the proximity switch seat 30 is provided with a block 29 corresponding to the proximity switch 18. . The middle bed plate 18 is also provided with a main ruler 21, and the screw nut 3 is provided with a measuring head 23 corresponding to the main ruler 21, and the measuring head 23 moves up and down with the screw nut 3.

The working principle of the utility model is:

As shown in Figure 5, firstly, the parameters of the testing machine are set through the control system (the control system of the utility model is the prior art). At the initial position, the stopper 29 on the cover plate 22 is opposite to the proximity switch 28 at the lower end of the proximity switch seat 30 . The diaphragm spring to be tested is put into the lower die 9, and the motor 4 works to drive the second pulley 27 to rotate, and the second pulley 27 drives the first pulley 24 to rotate through the belt 25, and then drives the screw 20 to rotate. The screw nut 3 on the leading screw 20 is threadedly connected with the leading screw 20, and the rotation pair of the leading screw 20 is changed into a moving pair, so that the screw nut 3 moves upward. The sleeve 19 fixedly connected with the nut 3 moves upward along with the nut 3 , and then the workbench 8 and the lower die 9 are moved upward. Workbench 8 and lower die 9 move upward until pressure sensor 13 has a pressure value, and the pre-pressing step starts, that is, the control system sends a signal to motor 4, and motor 4 drives sleeve 19 according to the above operation to drive workbench 8 and lower die 9 reciprocates up and down until the diaphragm spring changes from the initial dish-shaped state to the flattened state and finally forms a reversed state; after repeated pressing, the lower die 9 moves down a preset distance to restore the diaphragm spring to its original state , the preloading step is completed, and the loading starts, and the lower mold 9 moves upward again until the diaphragm spring is pressed against the state; after loading, the lower mold 9 moves downward, and unloading begins until the diaphragm spring returns to the initial state. In the process of loading and unloading, the pressure data is collected by the pressure sensor 13; when the sleeve 19 drives the workbench 8 and the lower die 9 to move, the measuring head 23 installed on the nut 3 moves up/down together, through The measuring head 23 collects displacement data; the pressure data collected by the pressure sensor 13 and the displacement data collected by the measuring head 23 are transmitted to the control system, and the control system performs data processing and displays it on the display screen.

During the upward movement of the lower die 9, if the pre-set system parameters are wrong or improperly operated, the nylon stopper 7 can act as a hard limiter to prevent the excessive stroke of the lower die 9 from causing damage to the equipment. During the upward movement of the lower mold 9, when the stopper 29 on the cover plate 22 moves up to the proximity switch 28 on the upper end of the proximity switch seat 30, the stopper 29 sends a signal to the proximity switch 28 at the upper end, and the proximity switch 28 transmits the signal To the control system, the motor 4 is controlled by the control system to stop working; by changing the position of the proximity switch 28 at the upper end of the proximity switch seat 30, the movement stroke of the lower die 9 can be controlled.

The utility model can also carry out pressure calibration on the pressure sensor 13 through the secondary instrument, so as to improve the accuracy of the testing machine.

The utility model is driven by a ball screw and a nut thread connection, which has the characteristics of high efficiency, high precision, high rigidity, reversibility, etc., and can realize slow feeding and pressurization and fast return to the initial position. Due to the high precision of the testing machine, the maximum diameter of the diaphragm spring that can be tested can reach 400mm, and the maximum working pressure can be 7.5T.

Claims (10)

1. diaphragm spring tester, it is characterized in that: comprise fuselage base plate (1), screw (3), worktable (8), counterdie (9), patrix (11), fuselage upper plate (16), intermediate bed body (18) and ball-screw (20), fuselage base plate (1), intermediate bed body (18) and fuselage upper plate (16) are connected by column (2), ball-screw (20) is installed on the fuselage base plate (1), and pass with drive unit by fuselage base plate (1) and to be connected, the screw (3) that is threaded with ball-screw (20) is provided with sleeve (19), the revolute pair of ball-screw (20) forms the pair that moves up and down of sleeve (19) by ball-screw (20) and being threaded of screw (3), the other end of sleeve (19) is passed by intermediate bed body (18), link to each other with worktable (8), counterdie (9) is installed on the worktable (8); Patrix (11) is installed in the top that fuselage upper plate (16) is gone up, is positioned at counterdie (9), and fuselage upper plate (16) is provided with the pressure transducer (13) that contacts with patrix (11).

2. by the described diaphragm spring tester of claim 1, it is characterized in that: described sleeve (19) is for inverse-T-shaped, the bottom is the cover plate (22) that is connected with screw (3), cover plate (22) is provided with a plurality of guide pillars (5), intermediate bed body (18) is provided with and corresponding second guide pin bushing of sleeve (19) (17) and a plurality of and corresponding first guide pin bushing of guide pillar (5) (6), guide pillar (5) is passed with worktable (8) by first guide pin bushing (6) and is connected, and sleeve (19) is passed with worktable (8) by second guide pin bushing (17) and is connected.

3. by the described diaphragm spring tester of claim 1, it is characterized in that: the outer rim that compresses the butterfly diaphragm spring at patrix (11) and counterdie (9) is equipped with steel ball (10).

4. by claim 1 or 2 described diaphragm spring testers, it is characterized in that: the periphery at intermediate bed body (18) bottom, second guide pin bushing (17) is provided with nylon block (7), and nylon block (7) is on the movement locus of cover plate (22).

5. by claim 1 or 2 described diaphragm spring testers, it is characterized in that: described intermediate bed body (18) is provided with near switch base (30), two ends up and down near switch base (30) are respectively equipped with near switch (18), cover plate (22) near be provided with near a side of switch base (30) with near the corresponding block of switch (18) (29).

6. by claim 1 or 2 described diaphragm spring testers, it is characterized in that: described intermediate bed body (18) is provided with main scale (21), and screw (3) is provided with and the corresponding measuring head of main scale (21) (23).

7. by the described diaphragm spring tester of claim 1, it is characterized in that: described patrix (11) is provided with patrix closing seat (12), fuselage upper plate (16) is provided with a plurality of ball splines (15), and the other end of ball spline (15) links to each other closing seat (12) with patrix; Pressure transducer (13) passes patrix and contacts with patrix (11) closing seat (13).

8. by claim 1 or 7 described diaphragm spring testers, it is characterized in that: described pressure transducer (13) and ball spline (15) respectively are three, patrix is evenly equipped with first hole (31) and three second holes (32) that supply ball spline (15) to pass that three voltage supply force transducers (13) pass, first hole (31) and the alternate setting in second hole (32) closing on the seat (13).

9. by the described diaphragm spring tester of claim 1, it is characterized in that: described drive unit is made up of motor (4), first belt pulley (24), belt (25) and second belt pulley (27), motor (4) is installed on the fuselage base plate (1), and the output shaft of motor (4) passes, is provided with second belt pulley (27) by fuselage base plate (1); Ball-screw (20) passes, is provided with first belt pulley (24) by fuselage base plate (1), and first belt pulley (24) is by belt (25) and second belt pulley (27) transmission.

10. by the described diaphragm spring tester of claim 9, it is characterized in that: be provided with the pressure strip (26) that is fixed in the motor output shaft end in described second belt pulley (27).

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