JP2016136034A - Gearing type engagement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gearing type engagement device which can reduce an oil amount necessary for engagement without increasing a pressure receiving area of a hydraulic actuator which presses a dog tooth at one side.SOLUTION: A gearing type engagement device 1 comprises a rotating member 17 in which a recess 18 is formed at a side face, and a slide member 12 slidably engaged with a fixed part 2 and including a dog tooth 13 engaged with the recess 18 by moving to the side face of the rotating member 17. The gearing type engagement device also comprises a slide member 8 which presses the slide member 12 to the rotating member 17 side according to torque which is transmitted by the contact of the slide member with the rotating member 17, and a hydraulic actuator which presses the slide member 8 to the rotating member 17 side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a meshing engagement device that meshes two relatively rotating members and integrates them in a rotational direction.

  Patent Document 1 describes a meshing engagement device in which dog teeth are formed on surfaces facing each other. This meshing engagement device functions as a brake, and one dog tooth is connected to a fixed portion. Moreover, the actuator which presses the dog tooth toward the other dog tooth is provided, and the meshing state and the non-meshing state are switched by controlling the actuator.

  Note that Patent Document 2 and Patent Document 3 describe a meshing engagement device including a cam mechanism that presses one dog tooth toward the other dog tooth. These meshing engagement devices are configured to receive a load in the separating direction acting on one dog tooth by the cam mechanism by fixing the cam mechanism when each dog tooth transmits torque.

JP 2009-191954 A JP 2009-19716 A JP 2005-127438 A

  Incidentally, the meshing engagement device moves the dog teeth so that the meshing length is equal to or greater than a predetermined value. Further, when the meshing engagement device is released, the position of the dog teeth is determined so as to leave a predetermined gap between the tips of the dog teeth so as to prevent the dog teeth from unintentionally meshing with each other. . Therefore, when engaging the meshing engagement device, the dog teeth are moved by the gap and the meshing length. Therefore, in the meshing engagement device, the time from the start of the engagement control to the completion of the engagement is relatively long. When the dog teeth are configured to be pressed and moved by the hydraulic actuator, the position of the dog teeth is determined according to the amount of oil supplied to the hydraulic actuator. On the other hand, when the amount of oil supplied to the hydraulic actuator is increased, there is a possibility that the apparatus becomes large. Therefore, in order to shorten the time from the start of meshing to the completion of meshing, it is preferable to configure the moving amount of the dog teeth per unit oil amount to be supplied. That is, it is preferable to reduce the volume by reducing the pressure receiving area of the hydraulic actuator. However, when the meshing engagement device is engaged, in the configuration that receives the load in the direction in which the dog teeth are separated, it is necessary to receive the reaction force by the hydraulic actuator, and when the pressure receiving area of the hydraulic actuator is reduced, Accordingly, it is necessary to increase the hydraulic pressure to be supplied, and there is a possibility that power loss such as a hydraulic pressure source increases.

  The present invention has been made paying attention to the above technical problem, and is a meshing type capable of reducing the amount of oil required for engagement without increasing the pressure receiving area of the hydraulic actuator that presses one dog tooth. The object is to provide an engagement device.

  In order to achieve the above object, the present invention provides a rotating member having a recess formed on a side surface, and a slidably engaging fixed portion and moving toward the side surface of the rotating member. In a meshing engagement device having a sliding member having dog teeth engaged with the rotating member, the sliding member is pressed toward the rotating member according to torque transmitted by contacting the rotating member. A slide member, and a hydraulic actuator that presses the slide member toward the rotation member. The slide member includes a first protrusion, and the slide member has a rotation direction of the slide member. A second protrusion that engages with the first protrusion is formed, and a contact surface between the first protrusion and the second protrusion is configured to cause the sliding member to move in response to torque transmitted to the sliding member. Rotating member And it is characterized in that it is formed as an inclined surface to produce a component force that presses the.

  According to the present invention, the sliding member having the dog teeth formed according to the torque transmitted by the slide member being pressed toward the rotating member by the hydraulic actuator and contacting the sliding member with the rotating member It is comprised so that it may press on the rotation member side provided with the recessed part engaged with a tooth | gear. Therefore, after the slide member comes into contact with the rotating member, the dog teeth can be moved to the concave portion side without changing the volume of the hydraulic chamber in the hydraulic actuator. In other words, the amount of oil required to engage the meshing engagement device is an amount corresponding to the clearance amount between the slide member and the rotating member, and corresponds to the meshing length between the dog teeth and the recess. Is not required. Therefore, the amount of change in volume can be reduced without increasing the pressure receiving area of the hydraulic actuator when engaging the meshing engagement device. As a result, the amount of oil required to engage the meshing engagement device can be reduced, so that the time from when oil is supplied to the hydraulic actuator until the meshing engagement device is engaged is shortened. Can do.

It is a schematic diagram for demonstrating an example of the meshing type engagement apparatus which concerns on this invention. It is a figure which shows the state which the meshing type engagement apparatus has released. It is a figure which shows the state which supplied hydraulic pressure to the meshing type engagement apparatus, and the slide member contacted the plate. It is a figure which shows the state which the front-end | tip part of the dog tooth in the meshing type engagement apparatus contacted the plate. It is a figure which shows the state which the meshing type engagement apparatus engaged.

  An example of a meshing engagement device according to the present invention is schematically shown in FIG. A meshing engagement device 1 shown in FIG. 1 includes a cylindrical container 2 connected to a case (not shown). A part of the opening of the container 2 is formed with a seat surface portion 3 protruding toward the inside of the opening. This seat surface part 3 receives the reaction force of the return spring mentioned later. Further, a through hole 4 connected to a hydraulic pressure source (not shown) is formed on the bottom surface of the container 2. The container 2 corresponds to the fixing portion in the embodiment of the present invention.

  A disk-like piston 5 is accommodated in the container 2 so as to be slidable in the axial direction, and oil is supplied to the hydraulic chamber 6 between the piston 5 and the bottom surface of the container 2. ing. That is, the container 2 and the piston 5 correspond to the hydraulic actuator in the embodiment of the present invention. Note that a seal member 7 such as an O-ring is provided on the outer peripheral surface of the piston 5 to prevent oil from leaking from the hydraulic chamber 6.

  A slide member 8 is provided in contact with the side surface opposite to the side surface of the piston 5 facing the bottom surface of the container 2. The slide member 8 is in contact with the side surface of the piston 5 and is formed so as to protrude from the pedestal portion 9 to the opening side of the container 2 with a pedestal portion 9 formed to have the same outer diameter as the inner diameter of the container 2. The cylindrical portion 10 is formed to have an outer diameter smaller than the inner diameter of the container 2, and is provided to be rotatable and slidable with respect to the container 2. And the 1st projection part 11 which protruded in the axial direction is formed in the outer peripheral part of the base part 9. As shown in FIG. The first projecting portion 11 is formed with an inclined surface so as to generate a component force that presses a ring member, which will be described later, to the plate side when torque is transmitted from the plate, which will be described later, and the slide member 8 rotates. .

  A ring member 12 is slidably fitted to the cylindrical portion 10, and a dog that protrudes toward the opening of the container 2 and engages with a recess described later is formed on one side surface of the ring member 12. Teeth 13 are formed, and a second protrusion 14 is formed on the other side surface to engage the first protrusion 11 in the circumferential direction. An inclined surface that is in surface contact with the inclined surface of the first protrusion 11 is formed at the tip of the second protrusion 14. Further, the ring member 12 is configured to engage in a circumferential direction with a rotation stopper 15 protruding from the inner surface of the container 2. That is, the ring member 12 is provided inside the container 2 so that it cannot rotate. Furthermore, a return spring 16 that presses the ring member 12 toward the bottom surface of the container 2 is provided. The ring member 12 corresponds to the sliding member in the embodiment of the present invention.

  And the plate 17 is provided facing the opening part of the container 2, and the plate 17 is connected with rotating members, such as a gear which is not shown in figure. Further, a recess 18 is formed on the side surface of the plate 17 on the side of the container 2 to engage the tip of the dog tooth 13. The plate 17 corresponds to the rotating member in the embodiment of the present invention.

  Here, the operation of the meshing engagement device shown in FIG. 1 will be described. FIG. 2 is a diagram illustrating a state where the meshing engagement device 1 is released. When the meshing engagement device 1 is released as shown in FIG. 2, no oil is supplied to the hydraulic chamber 6. On the other hand, the spring force of the return spring 16 acts on the ring member 12 as described above. Therefore, the ring member 12 is pressed in a direction away from the plate 17, and a load against the spring force is not acting. As described above, since the inclined surfaces of the projections 11 and 14 are in contact with each other, the load applied to the ring member 12 is transmitted to the slide member 8 via the projections 11 and 14, and further to the piston 5. Communicated. Accordingly, the piston 5, the slide member 8, and the ring member 12 are integrally moved to the bottom surface side of the container 2. When the slide member 8 and the ring member 12 are pressed against the bottom surface side of the container 2 as described above, the distal end surface of the slide member 12 (more specifically, the cylindrical portion 10) and the distal end surface of the dog teeth 13 are The length of the cylindrical portion 10 and the length of the dog teeth 13 are determined so as to leave a predetermined gap from the side surface of the plate 17.

  When oil is supplied to the hydraulic chamber 6 in a state where the meshing engagement device 1 is separated as described above, a load against the spring force of the return spring 16 acts on the piston 5. When the load based on the hydraulic pressure in the hydraulic chamber 6 becomes larger than the spring force, the piston 5 starts to move toward the plate 17 side. Since the slide member 8 is in contact with the side surface of the piston 5, the slide member 8 moves integrally with the piston 5. Then, the front end surface of the cylindrical portion 10 comes into contact with the side surface of the plate 17 and movement of the piston 5 and the slide member 8 is restricted. At this time, the tip surface of the dog tooth 13 is configured not to contact the plate 17. FIG. 3 shows a state in which the tip surface of the cylindrical portion 10 is in contact with the side surface of the plate 17 as described above.

  As described above, the plate 17 rotates while being connected to a rotating member such as a gear (not shown), and the slide member 8 is pressed so that the tip surface of the cylindrical portion 10 and the side surface of the plate 17 are in contact with each other. . Accordingly, torque is transmitted from the plate 17 to the slide member 8. At that time, the plate 17 and the slide member 8 are slipped and transmitted according to the friction coefficient between the tip surface of the cylindrical portion 10 and the side surface of the plate 17 and the load on which the slide member 8 is pressed. Torque is determined. When torque is transmitted to the slide member 8 in this way, the first protrusion 11 presses the second protrusion 14 in the rotation direction. On the other hand, the contact surfaces of the protrusions 11 and 14 are formed to be inclined, and the ring member 12 cannot rotate. Therefore, the component force which presses the ring member 12 to the plate 17 side arises according to the load which the 2nd projection part 14 is pressed, and the inclination angle of a contact surface. As a result, the ring member 12 moves to the plate 17 side. At this time, if the phase of the dog teeth 13 in the rotation direction and the phase of the recesses 18 do not match, the tip surface of the dog teeth 13 contacts the side surface of the plate 17 and the phases match. In that case, the dog teeth 13 engage with the recesses 18. FIG. 4 shows a state in which the distal end surface of the dog tooth 13 is in contact with the side surface of the plate 17. Thus, when the front end surface of the dog tooth 13 contacts the side surface of the plate 17, sliding friction resistance is generated on the contact surface, so that the rotational speed of the plate 17 is reduced.

  When the dog teeth 13 are pressed toward the plate 17 as described above and the plate 17 further rotates, the phase of the dog teeth 13 coincides with the phase of the recess 18 as shown in FIG. The dog teeth 13 engage with the recesses 18. As described above, the dog teeth 13 are formed on the ring member 12, and the ring member 12 cannot rotate. Therefore, when the dog teeth 13 engage with the recesses 18, the rotation of the plate 17 is stopped. . That is, the meshing engagement device 1 shown in FIG. 1 is configured to function as a brake.

  By configuring as described above, the movement amount of the piston 5 is the clearance amount between the tip surface of the cylindrical portion 10 and the side surface of the plate 17. In other words, it is not necessary to move the dog teeth 13 and the recesses 18 by the meshing length. Therefore, the amount of change in the volume of the hydraulic chamber 6 when the meshing engagement device 1 is engaged can be reduced. As a result, since the amount of oil supplied to the hydraulic chamber 6 can be reduced, the time from the start of supplying oil to the hydraulic chamber 6 until the engagement of the meshing engagement device 1 is completed can be shortened. .

  DESCRIPTION OF SYMBOLS 1 ... Meshing type engagement apparatus, 2 ... Container, 5 ... Piston, 6 ... Hydraulic chamber, 8 ... Slide member, 11 ... 1st projection part, 12 ... Ring member, 13 ... Dog tooth, 14 ... 2nd projection part, 17 ... plate, 18 ... concave.

Claims (1)

A rotating member having a recess formed on a side surface; and a sliding member having dog teeth that are slidably engaged with the fixed portion and engaged with the recess by moving toward the side surface of the rotating member. In a meshing engagement device with
A sliding member that presses the sliding member toward the rotating member according to torque transmitted by contacting the rotating member;
A hydraulic actuator that presses the slide member toward the rotating member;
A first protrusion is formed on the slide member,
The sliding member is formed with a second protrusion that engages with the first protrusion in the rotation direction of the slide member,
The contact surface between the first protrusion and the second protrusion is formed as an inclined surface that generates a component force that presses the sliding member toward the rotating member in accordance with torque transmitted to the sliding member. A meshing engagement device characterized by comprising:

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