JP2018080771A - Position selection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position selection device easy to control.SOLUTION: A position selection device 100 has a first abutment face E1, a first pressure receiving face S1, a first piston 1 having a second pressure receiving face S2, a second piston 2 having a second abutment face E2 coming into abutment with the first abutment face E1, and a step part 3c coming into abutment with the second abutment face E2, thereby restricting the movement of the second piston 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a position selection device.

  Patent Document 1 discloses a technique for realizing a position corresponding to a transmission range by moving a manual valve with a hydraulic actuator.

JP 2004-316862 A

  In order to realize a position corresponding to the range of the transmission, for example, it is conceivable to move the manual valve by adjusting piston thrust forces facing each other with a linear solenoid valve. However, in this case, since it is necessary to adjust the balance of the piston thrusts facing each other in order to realize the intermediate position, there is a possibility that higher controllability is required.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a position selection device that can be easily controlled.

  The position selection device according to an aspect of the present invention includes a first contact surface, a first pressure receiving surface, and a second pressure receiving surface constituting a back surface with respect to the first contact surface and the first pressure receiving surface. A second piston having a second contact surface that contacts the first contact surface, and a stopper that restricts movement of the second piston by contacting the second contact surface. Have.

  According to the above aspect, the second piston stops at the predetermined piston position by the contact between the stopper and the second contact surface. The second piston functions as a stopper for the first piston by the first and second contact surfaces coming into contact with each other at a predetermined piston position.

  For this reason, according to the said aspect, since a 1st piston can be hold | maintained in a predetermined piston position with a mechanical stopper effect | action, the control at the time of selecting a predetermined position from another position is easy. Further, according to the above aspect, if the hydraulic pressure is supplied to one of the first pressure receiving surface and the second pressure receiving surface and the hydraulic pressure acting on the other is released, another position can be selected from a predetermined position. Is easy.

It is a figure which shows a position selection apparatus in the state which implement | achieved the 1st position. It is a figure which shows a position selection apparatus in the state which implement | achieved the 2nd position. It is a figure which shows a position selection apparatus in the state which implement | achieved the intermediate position.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 are schematic configuration diagrams of the position selection device 100. The position selection device 100 switches the oil distribution path in accordance with the transmission selection range. The position selection device 100 has a first position, a second position, and an intermediate position between the first position and the second position as positions corresponding to the transmission range.

  The first position is a position corresponding to the D range, that is, the forward range. The second position is a position corresponding to the R range, that is, the reverse range. The intermediate position is a position corresponding to the N range, that is, the neutral range.

  FIG. 1 shows the position selection device 100 in a state where the first position is realized. 2 shows the position selecting device 100 in a state where the second position is realized, and FIG. 3 shows the position selecting device 100 in a state where the intermediate position is realized.

  The position selection device 100 includes a first piston 1, a second piston 2, a housing 3, a control oil passage 4, a supply oil passage 5, a first SOL 6, and a second SOL 7. SOL is an abbreviation for solenoid valve.

  The first piston 1 and the second piston 2 are accommodated in the housing 3. The first piston 1 has a substantially columnar shape, and the second piston 2 has a cylindrical shape. One end portion of the first piston 1 constitutes an insertion portion that is slidably inserted into the second piston 2.

  The first piston 1 has a first contact surface E1, a first pressure receiving surface S1, and a second pressure receiving surface S2. The first contact surface E1 and the first pressure receiving surface S1 are provided on one end side, and the second pressure receiving surface S2 is provided on the other end side.

  The first contact surface E1 is provided on the other end side of the first piston 1 with respect to the first pressure receiving surface S1. The first contact surface E1 is connected to the first pressure receiving surface S1 by the outer peripheral surface of one end portion of the first piston 1. The first contact surface E <b> 1 contacts the second piston 2.

  The first pressure receiving surface S1 constitutes a pressure receiving surface on one side of the first piston 1. Specifically, the first pressure receiving surface S <b> 1 is configured by one end surface of the first piston 1. The second pressure receiving surface S2 constitutes the pressure receiving surface on the other side of the first piston 1. Specifically, the second pressure receiving surface S <b> 2 is configured by the other end surface of the first piston 1. The second pressure receiving surface S2 constitutes a back surface with respect to the first contact surface E1 and the first pressure receiving surface S1. “The first predetermined surface (for example, the second pressure receiving surface S2) constitutes a surface on the back side with respect to the second predetermined surface (for example, the first contact surface E1, the first pressure receiving surface S1)”. When a force is applied in the direction of pressing one of the first predetermined surface and the second predetermined surface, the other of the first predetermined surface and the second predetermined surface is pulled in the direction of pulling the other of the first predetermined surface and the second predetermined surface. Means a moving relationship.

  The second piston 2 has a second contact surface E2 and a third pressure receiving surface S3. The second contact surface E2 is configured by the other end surface of the second piston 2, and contacts the first contact surface E1. The third pressure receiving surface S3 constitutes a back side surface with respect to the second pressure receiving surface S2. Specifically, the third pressure receiving surface S <b> 3 is configured by one end surface of the second piston 2.

  The area of the first pressure receiving surface S1 is set smaller than the area of the second pressure receiving surface S2. On the other hand, the second piston 2 has an outer diameter larger than the outer diameter of the second pressure receiving surface S2. For this reason, the sum of the area of the first pressure receiving surface S1 and the area of the third pressure receiving surface S3 is larger than the area of the second pressure receiving surface S2.

  The housing 3 has a first pressure receiving chamber R1 and a second pressure receiving chamber R2. A first pressure receiving surface S1 and a third pressure receiving surface S3 are located in the first pressure receiving chamber R1, and a second pressure receiving surface S2 is located in the second pressure receiving chamber R2. In other words, the first pressure receiving surface S1 and the third pressure receiving surface S3 receive pressure in the first pressure receiving chamber R1, and the second pressure receiving surface S2 receives pressure in the second pressure receiving chamber R2. The first pressure receiving chamber R1 and the second pressure receiving chamber R2 constitute a pressure receiving chamber on one side and a pressure receiving chamber on the other side that cause the first piston 1 to generate an opposing thrust.

  The housing 3 includes a first housing portion 3a, a second housing portion 3b, and a step portion 3c. The 1st accommodating part 3a accommodates the 1st piston 1 so that sliding is possible, and the 2nd accommodating part 3b accommodates the 2nd piston 2 so that sliding is possible. The 2nd accommodating part 3b has a bigger internal diameter than the 1st accommodating part 3a, and the level | step-difference part 3c connects the 1st accommodating part 3a and the 2nd accommodating part 3b. The second piston 2 comes into contact with the stepped portion 3c, thereby restricting the movement of the second piston 2. The step 3c constitutes a stopper.

  The housing 3 includes a first control port part P1, a second control port part P2, an inlet port part P3, a first outlet port part P4, a first drain port part P5, a second outlet port part P6, And a second drain port portion P7. Each port part P1 to P7 is provided in a ring shape.

The first control port portion P1 communicates with the first pressure receiving chamber R1, and the second control port portion P2 communicates with the second pressure receiving chamber R2. The inlet port portion P3 communicates with the first outlet port portion P4 or the second outlet port portion P6 via an internal passage.
Communicate with.

  The first outlet port portion P4 communicates with the inlet port portion P3 in a state where the first position shown in FIG. 1 is realized. The forward clutch FWD / C is connected to the first outlet port portion P4. The first outlet port portion P4 communicates with the first drain port portion P5 in a state where the intermediate position shown in FIG. 3 is realized.

  The second outlet port portion P6 communicates with the inlet port portion P3 in a state where the second position shown in FIG. 2 is realized. A reverse brake REV / B is connected to the second outlet port portion P6. The second outlet port portion P6 communicates with the second drain port portion P7 in a state where the intermediate position shown in FIG. 3 is realized.

  The control oil path 4 is connected to the first control port part P1 and the second control port part P2. For this reason, a common hydraulic pressure is supplied from the control oil passage 4 to the first pressure receiving chamber R1 and the second pressure receiving chamber R2. Specifically, the control oil passage 4 has a first branch oil passage 4a and a second branch oil passage 4b that are branched and connected to the first control port portion P1 and the second control port portion P2.

  The supply oil passage 5 is connected to the inlet port portion P3. The supply oil path 5 constitutes an oil path for supplying oil to the forward clutch FWD / C and the reverse brake REV / B. The supply oil passage 5 supplies oil to the forward clutch FWD / C in a state where the first position shown in FIG. 1 is realized. The supply oil passage 5 supplies oil to the reverse brake REV / B in a state where the second position shown in FIG. 2 is realized.

  The first SOL 6 and the second SOL 7 are provided in the control oil passage 4. Specifically, the first SOL 6 is provided in the first branch oil passage 4a, and the second SOL 7 is provided in the second branch oil passage 4b. For this reason, hydraulic pressure is supplied to the first pressure receiving chamber R1 from the control oil passage 4 via the first SOL6, and hydraulic pressure is supplied to the second pressure receiving chamber R2 from the control oil passage 4 via the second SOL7.

  Both the first SOL 6 and the second SOL 7 communicate and block the control oil passage 4. When the control oil passage 4 is shut off, the first SOL 6 communicates the first pressure receiving chamber R1 and the drain port, and the second SOL 7 communicates the second pressure receiving chamber R2 and the drain port. Both the first SOL6 and the second SOL7 constitute a hydraulic actuator. The hydraulic actuator is an actuator for hydraulic control. Specifically, the SOL 6 and SOL 7 control the downstream hydraulic pressure by supplying oil and draining. The first SOL 6 corresponds to a first hydraulic actuator, and the second SOL 7 corresponds to a second hydraulic actuator.

  The position selection device 100 is controlled by the controller 10. The controller 10 is a transmission controller, and controls the first SOL 6 and the second SOL 7 in accordance with a driver's range selection operation.

  When the D range is selected, the controller 10 controls the first SOL 6 to communicate with the control oil passage 4 and controls the second SOL 7 to shut off the control oil passage 4. As a result, the first position shown in FIG. 1 is selected.

  When the R range is selected, the controller 10 controls the first SOL 6 so as to block the control oil passage 4 and also controls the second SOL 7 so as to communicate with the control oil passage 4. As a result, the second position shown in FIG. 2 is selected.

  When the N range is selected, the controller 10 controls the first SOL 6 and the second SOL 7 so as to communicate with the control oil passage 4. Thereby, the intermediate position shown in FIG. 3 is selected.

  Next, main effects of the position selection device 100 will be described.

  The position selecting device 100 includes a first contact surface E1, a first pressure receiving surface S1, a first piston 1 having a second pressure receiving surface S2, and a second contact surface E2 that contacts the first contact surface E1. And a step 3c that restricts the movement of the second piston 2 by abutting against the second abutment surface E2.

  According to such a configuration, the second piston 2 stops at the intermediate piston position by the contact between the stepped portion 3c and the second contact surface E2. Moreover, the second piston 2 functions as a stopper for the first piston 1 by the first contact surface E1 and the second contact surface E2 contacting each other at the intermediate piston position.

  For this reason, according to such a configuration, the first piston 1 can be held at the intermediate piston position by a mechanical stopper action, so that control when selecting the intermediate position from the first position and the second position is easy. . Further, according to such a configuration, if the hydraulic pressure is supplied to one of the first pressure receiving surface S1 and the second pressure receiving surface S2 and the hydraulic pressure acting on the other is released, the first position and the second position can be changed from the intermediate position. Since the position can be selected, control is easy (effect corresponding to claim 1).

  In the position selection device 100, the area of the first pressure receiving surface S1 is set smaller than the area of the second pressure receiving surface S2.

  According to such a configuration, even when the same pressure is supplied to the first pressure receiving surface S1 and the second pressure receiving surface S2 when the first piston 1 is held at the intermediate piston position at the intermediate position, The thrust of the first piston 1 can be generated in the direction in which the first contact surface E1 is pressed against the second contact surface E2. For this reason, it becomes difficult for the first piston 1 to move to the second pressure receiving chamber R2 side due to an external factor, and the stability of the intermediate position can be improved (effect corresponding to claim 2).

  In the position selection device 100, the second piston 2 has a third pressure receiving surface S3, and the sum of the area of the first pressure receiving surface S1 and the area of the third pressure receiving surface S3 is larger than the area of the second pressure receiving surface S2. Is set.

  In the case of such a configuration, the position selection device 100 can realize an intermediate position even when the same pressure is supplied to the first pressure receiving surface S1 and the second pressure receiving surface S2. Effect corresponding to item 3).

  The position selection device 100 further includes a control oil passage 4, a first SOL6, a second SOL7, a first pressure receiving chamber R1, and a second pressure receiving chamber R2. In the position selection device 100, the hydraulic pressure is supplied from the control oil passage 4 to the first pressure receiving chamber R1 via the first SOL6, and the hydraulic pressure is supplied from the control oil passage 4 to the second pressure receiving chamber R2 via the second SOL7.

  According to such a configuration, the common control oil passage 4 is coupled with the fact that an intermediate position can be realized even if the same pressure is supplied to the first pressure receiving surface S1 and the second pressure receiving surface S2. The hydraulic pressure can be supplied to the first pressure receiving chamber R1 and the second pressure receiving chamber R2. Further, according to such a configuration, when the intermediate position is realized, it is only necessary to open the first SOL 6 and the second SOL 7, so that the control is easy (effect corresponding to claim 4).

  The position selection device 100 has a first position shown in FIG. 1, a second position shown in FIG. 2, and an intermediate position shown in FIG. 3 as positions corresponding to the range of the transmission. In the position selection device 100, when the N range is selected, an intermediate position is selected as a position corresponding to the N range. When the D range is selected, the first position is selected as the position corresponding to the D range, and when the R range is selected, the second position is selected as the position corresponding to the R range.

  According to such a configuration, it is possible to facilitate control when the range is switched in accordance with the range selection operation of the transmission (effect corresponding to claim 5).

  As mentioned above, although embodiment of this invention was described, the said embodiment showed only a part of application example of this invention, and the meaning which limits the technical scope of this invention to the specific structure of the said embodiment. Absent.

  For example, the forward clutch FWD / C and the reverse brake REV / B may be interchanged. In this case, when the R range is selected, the controller 10 may be configured such that the first position shown in FIG. 1 is selected as a position corresponding to the R range. In addition, when the D range is selected, the controller 10 may be configured so that the second position shown in FIG. 2 is selected as a position corresponding to the D range.

  The hydraulic actuator may be a linear SOL that includes a solenoid unit that generates a pilot pressure and a valve unit that operates according to the pilot pressure generated by the solenoid unit. In this case, specifically, it can be understood that the valve portion of the linear SOL is a hydraulic actuator that controls the hydraulic pressure, and constitutes a hydraulic actuator that is driven by the hydraulic pressure.

DESCRIPTION OF SYMBOLS 1 1st piston 2 2nd piston 3 Housing 3c Step part (stopper)
4 Control oil passage (oil passage)
6 1st SOL (1st hydraulic actuator)
7 2nd SOL (2nd hydraulic actuator)
100 position selection device E1 first contact surface E2 second contact surface S1 first pressure receiving surface S2 second pressure receiving surface S3 third pressure receiving surface R1 first pressure receiving chamber R2 second pressure receiving chamber

Claims (5)

A first piston having a first abutting surface, a first pressure-receiving surface, and a second pressure-receiving surface that constitutes a back surface of the first abutting surface and the first pressure-receiving surface;
A second piston having a second contact surface that contacts the first contact surface;
A stopper for restricting the movement of the second piston by contacting the second contact surface;
A position selection device comprising: The position selection device according to claim 1,
The area of the first pressure receiving surface is smaller than the area of the second pressure receiving surface,
A position selection device characterized by that. The position selection device according to claim 1 or 2,
The second piston has a third pressure receiving surface constituting a surface on the back side with respect to the second pressure receiving surface,
The sum of the area of the first pressure receiving surface and the area of the third pressure receiving surface is larger than the area of the second pressure receiving surface,
A position selection device characterized by that. The position selection device according to claim 3,
Oil passage,
A first hydraulic actuator;
A second hydraulic actuator;
A first pressure receiving chamber in which the first pressure receiving surface and the third pressure receiving surface are located;
A second pressure receiving chamber in which the second pressure receiving surface is located;
Further comprising
Hydraulic pressure is supplied from the oil passage to the first pressure receiving chamber via the first hydraulic actuator,
Oil pressure is supplied from the oil passage to the second pressure receiving chamber via the second hydraulic actuator.
A position selection device characterized by that. The position selection device according to any one of claims 1 to 4,
As positions according to the range of the transmission, there are a first position, a second position, and an intermediate position between the first position and the second position,
When the neutral range is selected, the intermediate position is selected,
When the forward range is selected, one of the first position and the second position is selected,
When the reverse range is selected, the other of the first position and the second position is selected.
A position selection device characterized by that.

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