JPH04113303U - actuator - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the automatic constant speed traveling device from becoming inoperable due to the diaphragm coming off the output member, and to improve the quality of the automatic constant speed traveling device by reliably fixing the diaphragm to the output member. maintain. [Structure] A main body 5 is attached to the main body 5a of the diaphragm 5 which is spaced apart from the output member fixing part 5c to which the output member 4 is fitted.
The actuator 1 is provided with a rib 5e that has a thick wall portion 5d that is larger than the thickness of the actuator a and that is annular and prevents the output member fixing portion 5c from moving toward the main body 5a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is an example of an automatic system that automatically controls the speed of a car to a set value. The present invention relates to an actuator used as a drive source for a dynamic constant speed traveling device.

0002

[Conventional technology]

Figures 3 and 4 are used as a drive source for an automatic constant speed traveling device as described above. This is an example of an actuator.

0003 The illustrated actuator 50 is located near the left end of the receiving case 51 in FIG. is provided with an annular portion 51a, and a protruding pressure portion is provided approximately in the center of the receiving case 51. A force introduction port 51b is provided, and a concave shape is provided on the outer peripheral side of the pressure introduction port 51b. A return spring locking portion 51c is provided.

0004 In addition, the receiving side case holder is placed near the right end of the mounting side case 52 in FIG. An output section 52a, which will be described later, is provided at approximately the center of the mounting case 52. An output member insertion opening 52b for inserting the material 54 is provided.

[0005] The outer periphery of the main body 53a, which is approximately bowl-shaped, is provided on the rubber diaphragm 53. Attach the case fixing part 53b provided on the side to the annular part 51a of the receiving case 51. It is fixed by being pinched by the receiving side case holding part 52a of the side case 52. Ru.

[0006] Further, an annular output member fixing portion 53 provided on the inner peripheral side of the main body 53a. An output member 54 is fitted to c.

[0007] The output member 54 is connected to a throttle valve of the engine, which is a load (not shown). A cable connecting portion 54a that locks the connected throttle cable 60 and a diaphragm The recessed portion 54b supporting the output member fixing portion 53c of the arm 53 has a convex shape. A spring locking portion 54c is provided, and the output member of the diaphragm 53 is fixed to the recess 54b. By fitting the fixed part 53c, the elastic force of the output member fixing part 53c is used. An output member 54 is fixed to the diaphragm 53.

[0008] Also, the return spring locking portion 54c of the output member 54 and the receiving case 51 are connected to each other. The ends of the return springs 55, which are torsion coil springs, are respectively locked in the return spring locking portions 51c. The return spring 55 causes the output member 54 to move against the receiving case 51. When the output member 54 and the diaphragm 53 are biased toward the left side in FIG. A pressure chamber 56 is formed between the outer case 51.

[0009] In the actuator 1 having such a structure, the throttle cable 60 is In the state connected to the cable connection part 54a of the output member 54, the automatic constant speed traveling device is equipped. It is communicated and connected to the pressure inlet 51b by a command from a controller (not shown) that has been received. When the negative pressure generation mechanism (not shown) is turned on for a predetermined period of time, the pressure in the pressure chamber 56 is reduced. Therefore, the output member 54 receives the elastic repulsion in the return spring 55 due to the negative pressure in the pressure chamber 56. The output moves to the right side in FIG. 3 against the force.

0010 By outputting the output member 54 to the right side in FIG. pull the cable 60 to drive the engine throttle valve to the open side, and Run at a constant speed at the set speed.

[0011] In addition, the negative pressure generation mechanism is turned off by a command from the controller and the pressure chamber is turned off. When air is introduced into the output member 56, the elastic restoring force of the return spring 55 causes the output member 5 to 4 moves back to the left side in FIG. 3, so return the throttle cable 60. Do not operate the engine throttle valve.

0012 During this time, when the output member 54 outputs and moves back, the output of the diaphragm 53 The force member fixing portion 53c is fitted into the recess 54b of the output member 54. In response to this, the pressure in the pressure chamber 56 is prevented from escaping to the outside.

[0013]

[Problem that the idea aims to solve]

However, in the conventional actuator 50 described above, the output of the diaphragm 53 By fitting the member fixing part 53c into the recess 54b of the output member 54, the output part The output member 54 is fixed to the diaphragm 53 only by the elastic force of the material fixing part 53c. Due to its fixed structure, when the pressure inside the pressure chamber 56 increases abnormally, As the main body 53a of the diaphragm 53 expands, the output member fixing portion 53c It is difficult to say that the output member 54 will not be pulled out of the recess 54b of the output member 54. When the output member fixing portion 53c of the diaphragm 53 comes off from the recess 54b of the diaphragm 54, Since the atmosphere is allowed to flow into the pressure chamber 56, the output member 53 moves back and the slot I was unable to return the torque cable 60 and drive the engine throttle valve. , there is a problem that the automatic constant speed traveling device becomes inoperable, and it is necessary to solve these problems. The challenge was to decide.

[0014]

[Purpose of invention]

This idea was devised in view of the above-mentioned conventional issues. Prevents the automatic constant speed travel device from becoming inoperable by securely fixing the system to the output member. The purpose is to provide an actuator with

[0015]

[Structure of the idea]

[0016]

[Means to solve the problem]

The actuator according to this invention consists of an output member connected to a load and a mounting side housing. a base, a receiving case to be assembled to the mounting case, and a diamond approximately in the shape of a bowl. The case fixing part provided on the outer periphery of the flam body is connected to the receiving side case and the mounting side case. The output member fixing part provided on the inner circumferential side is inserted into and fixed by the output member. The attached diaphragm and the return spring locked to the output member and receiving case are stored. In an actuator equipped with a pressure chamber, The main body of the diaphragm is spaced apart from the output member fixing part toward the outer periphery. The main body of the output member fixing portion has a thick wall portion larger than the thickness and has an annular shape. It is characterized by a structure with ribs that prevent it from moving to the side, and the above-mentioned Means for solving the above-mentioned conventional problems with the structure of the invention related to actuators It is said that

[0017]

[Effect]

The actuator according to this invention has a dowel spaced apart from the output member fixing part toward the outer periphery. The thickness of the rib provided on the diaphragm body is greater than the thickness of the diaphragm body. The rib prevents the diaphragm of the output member fixing part from moving toward the main body. Therefore, even if the main body of the diaphragm expands, the output member will not be fixed due to the expansion. The output part does not work to loosen the fixed part's fit to the output member. When the output member is fixed to the diaphragm only by the elastic force of the material fixing part The diaphragm is less likely to come off from the output member compared to the above.

[0018]

【Example】

1 and 2 show an embodiment of the actuator according to this invention. Ru.

[0019] The illustrated actuator 1 has a ring near the left end of the receiving case 2 in FIG. A protruding pressure introduction port is provided at approximately the center of the receiving case 2. 2b, and a concave return groove on the outer circumferential side of the pressure introduction port 2b. A locking portion 2c is provided.

[0020] In addition, there is a receiving side case holding part near the right end of the mounting side case 3 in Figure 1. 3a, and an output member 4, which will be described later, is installed approximately in the center of the mounting side case 3. An output member insertion opening 3b for insertion is provided.

[0021] The rubber diaphragm 5 includes a thin, approximately bowl-shaped diaphragm. An annular case fixing part 5b is provided on the outer peripheral side of the main body 5a, and the die An annular output member fixing portion 5c is provided on the inner peripheral side of the yaphragm main body 5a.

[0022] Further, on the outer peripheral side of the output member fixing portion 5c of the diaphragm main body 5a, A ring-shaped diaphragm is provided at a position slightly apart from the output member fixing portion 5c. A rib including a thick portion 5d having a thickness larger than that of the ram body 5a. 5e is provided. Furthermore, the annular part 2a of the receiving side case 2 and the mounting side case Hold the case fixing part 5b of the diaphragm 5 between the receiving side case holding part 3a of the base 3. The output member fixing portion of the diaphragm body 5a The output member 4 is fitted onto the portion 5c.

[0023] The output member 4 is connected to a throttle valve of the engine, which is a load (not shown). Cable connecting portion 4a and diaphragm 5 that lock the tied throttle cable 60 a concave portion 4b supporting the output member fixing portion 5c and a return spring locking portion 4 having a convex shape; c is provided, and the output member fixing portion 5c of the diaphragm 5 is fitted into the recess 4b. As a result, the output is caused by the elastic force of the output member fixing portion 5c on the inner periphery of the rib 5e. A force member 4 is fixed to the diaphragm 5.

[0024] Here, the output member fixing portion 5c of the diaphragm 5 has a thick wall portion 5d attached to the rib 5e. , the elastic force is greater than that of the diaphragm body 5a. , the output member 4 is firmly fixed.

[0025] Further, the return spring locking portion 4c of the output member 4 and the return spring locking portion of the receiving case 2 The ends of return springs 6, which are torsion coil springs, are respectively locked in the portions 2c, and the return The output member 4 is attached to the left side in FIG. 1 with respect to the receiving case 2 by the spring 6. Pressure is created between the output member 4, the diaphragm 5, and the receiving case 2 when the A chamber 7 is formed.

[0026] In the actuator 1 having such a structure, the throttle cable 60 is In a state connected to the cable connection part 4a of the output member 4, it is equipped with an automatic constant speed traveling device. The illustration is connected to the pressure inlet 2b by a command from a controller (not shown). When the negative pressure generation mechanism is turned on for a predetermined period of time, it reduces the pressure in the pressure chamber 7. The output member 4 resists the elastic repulsion force exerted on the return spring 7 due to the negative pressure of the pressure chamber 7. Output moves to the right side inside. Output member 4 outputs to the right side in Figure 1 By moving, the throttle cable 60 is pulled to open the engine slot. drive the valve to the open side and drive the vehicle at a constant speed.

[0027] In addition, the negative pressure generation mechanism is turned off by a command from the controller and the pressure chamber is turned off. When atmospheric air is introduced into the output member 4, the elastic restoring force of the return spring 6 causes the output member 4 to 3, it will move back to the left side, so return the throttle cable 60 and remove the engine. It will not drive the gin's throttle valve.

[0028] Then, when the output member 4 moves to output and returns, the output portion of the diaphragm 5 The material fixing portion 5c is firmly fixed to the recess 4b of the output member 4 by the rib 5e. In that state, it responds to the output member 4 without moving toward the diaphragm body 5a side. This prevents the pressure in the pressure chamber 7 from escaping to the outside.

[0029]

[Effect of the idea]

As explained above, the actuator related to this invention has the above-mentioned configuration. Therefore, the rib prevents the diaphragm of the output member fixing part from moving toward the main body. Therefore, even if the main body of the diaphragm expands, the expansion causes the output member to Since it does not act to loosen the fixation of the fixed part to the output member, the output When the output member is fixed to the diaphragm only by the elastic force of the member fixing part, The diaphragm is less likely to come off from the output member than in the case where the diaphragm is Since pressure does not escape to the outside and atmospheric air does not flow into the pressure chamber, the output member can be manufactured accurately. This prevents the automatic constant speed traveling device from becoming inoperable and maintains high quality. It has the excellent effect of

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of an embodiment of an actuator according to the invention.

FIG. 2 is an external perspective view of the diaphragm and its surroundings in the actuator shown in FIG. 1;

FIG. 3 is a longitudinal cross-sectional side view of a conventional actuator.

FIG. 4 is an external perspective view of the diaphragm and its surroundings in the actuator shown in FIG. 3;

[Explanation of symbols]

1 Actuator 2 Receiving side case 3 Mounting side case 4 Output member 5 Diaphragm 5a (Diaphragm body) Main body 5b Case fixing part 5c Output member fixing part 5d Thick part 5e Rib 6 Return spring 7 Pressure chamber

Claims (1)

[Scope of utility model registration request] Claim 1: An output member connected to a load, a mounting case, a receiving case assembled to the mounting case, and a case fixing portion provided on the outer circumferential side of a diaphragm body having a substantially bowl shape. A pressure chamber that accommodates a diaphragm that is sandwiched and fixed between a case and a mounting case and that has an output member fixing portion provided on the inner circumferential side fitted to the output member, and a return spring that is locked to the output member and the receiving case. In the actuator, the main body of the diaphragm, which is spaced apart from the output member fixing part toward the outer periphery, is provided with a thick walled part larger than the thickness of the main body, and has an annular shape to extend the output member fixing part toward the main body side. An actuator characterized by being provided with a rib that prevents movement.