KR19980031673A - Durability test device of gear shift lever - Google Patents

Abstract

The present invention can provide a reaction force to the gear shift lever repeatedly according to the load acting in place of the load transmission to be tested at a constant load regardless of the number of tests, it is possible to minimize the cost and time waste of the sample exchange It relates to the durability test apparatus of the gear shift lever, which is inserted perpendicularly to the insertion groove (1a) of the case (1), the gear shift lever (4) to rotate around the fixing pin (3), and the operating rod (7) Is operatively coupled to the knob 5 of the gear shift lever 4 by an air cylinder 6 which repeatedly pushes and pulls the gear shift lever 4 by compressed air, and through a link 9. It consists of a closed hydraulic circuit 11 for providing a reaction force by using the hydraulic pressure generated by the pressing force of the shift lever (4) to be transmitted.

Description

Durability test device of gear shift lever

The present invention relates to an apparatus for testing the durability of a gear shift lever, and more particularly, by repeatedly providing a reaction force to the gear shift lever according to a load acting in place of a load transmission to test a constant load regardless of the number of tests. In addition, the present invention relates to a durability test apparatus for a gear shift lever that can reduce costs associated with sample replacement.

In general, transmissions used in automobiles can be classified into manual transmissions, automatic transmissions, and continuously variable transmissions according to the transmission method.In addition to the function of converting the torque of the engine and transmitting it to the wheels, the engine is idling when the vehicle stops, Reverse direction by changing the direction of rotation.

As the operating mechanism of the transmission used in automobiles, there are a direct operation type in which an operation lever is directly attached to the transmission, and a remote operation type in which the operation force of the transmission lever is transmitted to a link or a wire to operate the transmission. In addition, the gear shift lever for shifting by shifting the gear shift fork to each shift stage should have excellent durability. For this purpose, durability is tested using a test apparatus as shown in FIG. 1.

Referring to the configuration of the durability test apparatus of the gear shift lever according to the prior art shown in FIG. It is coupled to the gear shift lever 4 which is mounted to rotate, and the knob 5 which is the handle part of the gear shift lever 4 by the operation rod 7, and it repeats the gear shift lever 4 by compressed air. It consists of an air cylinder (6) to push or pull.

Therefore, when the shift lever 4 is pressurized by the air cylinder 6, the shift lever 4 operates the shift fork inside the load transmission 8 via the link 9. Here, the gear shift lever 4 is shown in a state of being fixed to the fixed stand for convenience, but in the actual test is installed in the same structure as the actual vehicle to proceed the test.

In the conventional durability test apparatus of the gear shift lever having such a configuration, since the vehicle is tested with a transmission mounted on the actual vehicle to provide reaction force to the gear shift lever, the friction force inside the transmission decreases as the number of tests increases, thereby shifting the shift lever. There is a disadvantage that the load acting on the change, and there is a problem that causes a waste of cost and time due to the sample exchange.

The present invention devised to solve this problem can be tested with a constant load irrespective of the number of tests by repeatedly providing the reaction force to the gear shift lever according to the load acting in place of the load transmission, and the cost of changing the sample And to provide a durability test apparatus of the gear shift lever that can minimize the waste of time.

The object of the present invention described above is inserted vertically into the insertion groove of the case, and is operatively coupled to the knob of the gear shift lever by the operating rod, and the gear shift lever rotates around the fixing pin, by compressed air Air cylinder for repeatedly pushing and pulling the gear shift lever, and a waste hydraulic circuit for providing a reaction force by using the hydraulic pressure generated by the pressing force of the shift lever transmitted through the link, the durability test apparatus of the gear shift lever Is achieved by

1 is a block diagram showing a durability test apparatus of a conventional gear shift lever

Figure 2 is a block diagram showing the durability test apparatus of the gear shift lever of the present invention

* Description of the symbols for the main parts of the drawings *

1: case 2: stand

3: lock pin 4: gear shift lever

5: Knob 6: Air cylinder

7: working rod 9: link

11: hydraulic valve 12: housing

12a. 12b: 1st and 2 hydraulic chambers 14: piston

16: Piston rod 18: Flow control chamber

20, 22: check valve 24, 26: first and second open / close valve

Hereinafter, with reference to the accompanying Figure 2 will be described in detail with respect to the durability test apparatus of the gear shift lever according to a preferred embodiment of the present invention.

Fig. 2 is a configuration diagram showing the durability test apparatus of the gear shift lever of the present invention, in which the same parts as those of the conventional structure shown in Fig. 1 are denoted by the same reference numerals.

As shown in Fig. 2, in the durability test apparatus of the gear shift lever according to the present invention, instead of a load transmission, a closed hydraulic circuit providing reaction force by hydraulic pressure was used.

In the schematic configuration thereof, the gear shift lever 4 is inserted perpendicularly to the insertion groove 1a of the case 1, and is rotatably mounted to the fixing base 2 around the fixing pin 3; By the pressing force of the shift lever 4 transmitted through the link 9 and the air cylinder 6 operatively coupled to the knob 5 of the gear shift lever 4 by the operating rod 7. It consists of a closed hydraulic circuit 11 for providing a reaction force by using the generated hydraulic pressure.

Here, in the configuration of the closed hydraulic circuit 11 which provides a reaction force through the operating force of the shift lever 4 operated by the air cylinder 6, the first hydraulic chamber 12a and the second hydraulic chamber 12b are shown. And a piston (14) which is pressed by the gear shift lever (4) transmitted through the link (9) and moves along the inner wall of the housing (12), and the movement of the piston (14). According to the flow rate control chamber provided with a first opening and closing valve 24 and the second opening and closing valve 26 is selectively opened in accordance with the pressure of the fluid delivered from the first hydraulic chamber 12a and the second hydraulic chamber 12b ( 18).

Here, the first hydraulic chamber 12a and the second hydraulic chamber 12b formed in the housing 12 are not partitioned by separate partitions, but the piston 14 slides along the inner wall of the housing 12. It refers to a space that is fluidly formed on the left and right sides. In addition, the piston rod 16 of the piston 14 is engaged with the link 9.

The flow rate regulating chamber 18 is provided with a passage provided along the opening of the first opening / closing valve 24 and the second opening / closing valve 26, so that the first hydraulic chamber 12a and the second hydraulic chamber 12b of the housing 12 are opened. ). In addition, the first opening / closing valve 24 and the second opening / closing valve 26 formed in the flow rate control chamber 18 are opened in proportion to the size of the hydraulic pressure generated by the piston 14. In order to prevent the backflow of the fluid, the flow regulating chamber 18 is provided with check valves 20 and 22 to allow the fluid to move in only one direction.

Next, a process of providing reaction force to the gear shift lever 4 using the waste hydraulic circuit 11 of the present invention having such a configuration will be described.

First, when the working rod 7 is pulled back by the air cylinder 6 and the shift lever 4 is pulled out, the link 9 pressurizes the piston 14 while rotating about the hinge 10. Accordingly, the piston 14 moves along the inner wall of the housing 12, compressing the fluid in the second hydraulic chamber 12b to open the first opening / closing valve 24. As the first opening / closing valve 24 is opened, the fluid in the second hydraulic chamber 12b moves through the flow rate control chamber 18 along the arrow direction P1 indicated by the dashed-dotted line and moves to the housing 12. It flows into the 1st hydraulic chamber 12a. Thus, the shift lever 4 is provided with an appropriate reaction force.

Next, when the actuating rod 7 is advanced by the air cylinder 6 and the shift lever 4 is pressed, the link 9 pulls the piston 14 while rotating about the hinge 10. Accordingly, the piston 14 moves along the inner wall of the housing 12 in the opposite direction as described above, compressing the fluid in the second hydraulic chamber 12b, thereby opening the second open / close valve 26. Let's do it. As the second opening / closing valve 26 is opened, the fluid in the second hydraulic chamber 12b moves along the flow direction adjustment chamber 18 along the arrow direction P2 shown by a dashed-dotted line to move the housing 12. Supplying to the second hydraulic chamber 12b provides an appropriate reaction force to the shift lever 4.

The durability test apparatus of the gear shift lever according to the present invention described above repeatedly provides the reaction force to the gear shift lever in accordance with the load applied to the gear shift by the air cylinder, and tests it with a constant load irrespective of the number of tests, thereby providing accurate life. Can be measured and has the effect of minimizing the waste of time and money due to sample exchange.

Claims (3)

A gear shift lever 4 inserted perpendicularly to the insertion groove 1a of the case 1 and pivoting around the fixing pin 3, and a knob of the gear shift lever 4 by the operation rod 7; Operatively coupled to (5), by the air cylinder (6) which repeatedly pushes and pulls the gear shift lever (4) by compressed air, and by the pressing force of the shift lever (4) transmitted through the link (9). Durability test apparatus of the gear shift lever comprising a closed hydraulic circuit (11) for providing a reaction force by using the generated hydraulic pressure. 2. The closed hydraulic circuit (11) according to claim 1, wherein the closed hydraulic circuit (11) includes a housing (12) having a first hydraulic chamber (12a) and a second hydraulic chamber (12b), and a gear shift lever transmitted through the link (9). A piston 14 which is pressed by (4) and moves along the inner wall of the housing 12, and from the first hydraulic chamber 12a and the second hydraulic chamber 12b in accordance with the movement of the piston 14; Durability test apparatus of the gear shift lever, characterized in that consisting of a flow control chamber (18) provided with a first opening and closing valve (24) and a second opening and closing valve (26) selectively opened according to the hydraulic pressure acting. 3. The durability of the gear shift lever according to claim 2, wherein the flow regulating chamber (18) is further provided with check valves (20) and (22) for restraining the flow of the fluid so that the fluid moves only in one direction. Test equipment.