JPH04113304U - actuator - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the automatic constant speed traveling device from becoming inoperable when the diaphragm comes off the output member, and to securely fix the diaphragm to the output member, thereby improving the automatic constant speed traveling device. maintain high quality. [Structure] Diaphragm body 5 of the diaphragm 5 spaced apart from the output member fixing portion 5c to which the output member 4 is fitted to the outer circumferential side
A is provided with a curved portion 5d which has an annular and convexly curved shape and blocks the output member fixing portion 5c from tensile force when the diaphragm body 5a is expanded, and the outer periphery of the curved portion 5d. The actuator 1 is provided with an auxiliary elastic part 5e on the side thereof, which has an elastic force larger than that of the diaphragm main body 5a, has an annular shape, and prevents the output member fixing part 5c from moving toward the diaphragm 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 diaphragm 53 extends. The force member fixing portion 53c is pulled and does not come off the recess 54b of the output member 54. It is difficult to say, but the output member fixing portion 5 of the diaphragm 53 from the recess 54b of the output member 54 If 3c comes off, air will flow into the pressure chamber 56, so the output member 53 will Move back and return the throttle cable 60 to drive the engine throttle valve. There is a problem that the automatic constant speed traveling device becomes inoperable. The challenge was to solve these problems.

[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, A ring-shaped diaphragm body spaced apart from the output member fixing portion toward the outer periphery The diaphragm body has a convexly curved shape and has a tensile force when the diaphragm body is expanded. A curved portion is provided that blocks the output member fixing portion, and an outer periphery of the curved portion is provided. The side of the diaphragm has an elastic force larger than that of the diaphragm body and has an annular shape. an auxiliary member that prevents the output member fixing portion from moving toward the diaphragm body; It is characterized by having a structure with an elastic part, and is suitable for the above-mentioned actuators. The structure of this invention is used as a means to solve the above-mentioned conventional problems.

[0017]

[Effect]

The actuator related to this invention has a structure that extends from the output member fixing part of the diaphragm to the outer periphery. The curved part provided on the diaphragm body that is spaced apart from the side is curved in a convex shape, and the diamond When the flam body expands, the tensile force causes this curved part to expand, causing the diaphragm to open. The tensile force from the ram body is cut off to the output member fixing part, and the output part of the diaphragm is The auxiliary elastic part provided on the diaphragm body, which is spaced from the material fixing part to the outer periphery, It has an elastic force greater than that of the ram body, and the diaphragm body stretches. Even if the tensile force acts on the output member fixing part of the diaphragm, These curved portions and auxiliary elastic portions prevent the output member fixing portion from attaching to the output member. Since the fitting is to be ensured without loosening, it is possible to use only the elastic force of the output member fixing part. Compared to the case where the output member is fixed to the diaphragm, the diaphragm is attached to the output part. It will be difficult to remove from the wood.

[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. The receiving case 2 is provided with a protruding pressure portion 2a at approximately the center thereof. An inlet 2b is provided on the outer peripheral side of the pressure inlet 2b of the receiving case 2. , a concave-shaped return spring 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, The diaphragm is arranged in an annular shape at a position slightly apart from the output member fixing part 5c. A curved portion 5 having a convexly curved shape with approximately the same thickness as the ram body 5a. d is provided in the vicinity of the outer circumferential side of the curved portion 5d. It protrudes in the same direction as the curved portion 5d with a thickness greater than that of the diaphragm body 5a. and an auxiliary bullet having a larger elastic force than the elastic force of the diaphragm body 5a. A sexual part 5e is provided.

[0023] Here, the tensile force when the diaphragm body 5a extends toward the outer circumference is an elastic force greater than the elastic force that the auxiliary elastic portion 5e has on the diaphragm body 5a. Since it has the above-mentioned tensile force, the output member fixing portion 5c is able to resist the tensile force. The auxiliary elastic portion 5e could not prevent it from spreading. When a tensile force is applied, the curved portion 5d located on the inner peripheral side of the auxiliary elastic portion 5e stretches. The tensile force that could not be blocked by the auxiliary elastic portion 5e is removed by blocking the tensile force. This prevents the output member fixing portion 5c from expanding.

[0024] Furthermore, the annular portion 2a of the receiving side case 2 and the receiving side case of the mounting side case 3 are It is fixed by sandwiching the case fixing part 5b of the diaphragm 5 with the holding part 3a. The output member 4 is fitted into the output member fixing portion 5c.

[0025] 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. By this, the output member fixing part 5c is fixed at the inner periphery of the auxiliary elastic part 5e and the curved part 5d. The output member 4 is fixed to the diaphragm 5 by the elastic force that it has.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] During this time, when the pressure inside the pressure chamber 7 increases above the output member of the diaphragm 5, When the diaphragm main body 5a extends toward the outer periphery, the fixed portion 5c acts as an auxiliary elastic portion 5e. prevents the tensile force from the diaphragm body 5a, and the auxiliary elastic portion 5e When a tensile force that cannot be prevented is applied, the elastic member is located on the inner peripheral side of the auxiliary elastic portion 5e. The curved portion 5d extends to cut off the tensile force and remove the output member fixing portion 5c from the output member 4. Do not allow the pressure in the pressure chamber 7 to escape to the outside by responding to the output member 4 so as not to loosen it. I'm trying to stay quiet.

[0030]

[Effect of the idea]

As explained above, the actuator related to this invention has the above-mentioned configuration. Therefore, when the diaphragm body extends outward, the auxiliary elastic part Blocking the tensile force from the flam body and preventing the tension that could not be blocked by the auxiliary elastic part When a force is applied, the curved part located on the inner peripheral side of the auxiliary elastic part stretches and absorbs the tensile force. This prevents the output member fixing part from loosening from 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, thereby reducing the pressure in the pressure chamber. Since the force is not released to the outside and the atmosphere is not allowed to flow into the pressure chamber, the output member can be operated accurately. to maintain high quality by preventing the automatic constant speed traveling device from becoming inoperable. This has an excellent effect.

[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 5b Case fixing part 5c Output member fixing part 5d Curved part 5e Auxiliary elastic part 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 diaphragm body spaced apart from the output member fixing portion toward the outer periphery has an annular convexly curved shape, and the tensile force when the diaphragm body is expanded is absorbed by fixing the output member. a curved part that blocks the output member fixing part, and has an elastic force larger than the elastic force of the diaphragm body on the outer peripheral side of the curved part, and has an annular shape toward the diaphragm body side of the output member fixing part. An actuator characterized by being provided with an auxiliary elastic part that prevents movement of the actuator.