Shift change assist jig

Abstract

This product provides an auxiliary jig for gear shifting that is easy to operate and convenient to use. [Solution] The device comprises a main body 2 with an operating grip portion 3 at one end, a first operating portion 4 formed at the other end and abutting against the tip of the actuator rod, a second operating portion 5 provided protruding from the main body 2 between the operating grip portion 3 and the first operating portion 4 and selectively engaging with a first connection point between the shift rod 8 and the bending link 12 and a second connection point between the bending link 12 and the rod 10a of the actuator 10, and a third operating portion 6 provided protruding from the main body 2 and abutting against the tip of the shift rod 8, configured such that the second operating portion 5 engages with the first connection point when the first operating portion 4 abuts against the tip of the rod 10a of the actuator 10, and the third operating portion 6 abuts against the tip of the shift rod 8 when the second operating portion 5 is engaged with the second connection point.

Description

Technical Field

[0001] The present invention relates to a jig used when manually switching the gear stage of a transmission in a non-operating state, and particularly to a shift change assist jig used in a transmission that switches the gear stage by moving a shift rod back and forth in its axial direction.

Background Art

[0002] The transmission of a vehicle is made to perform a shift operation for inspection or evaluation after assembly on a production line or after reassembly after disassembly for maintenance. Usually, a shift rod is rotated or moved in the axial direction by an actuator such as a motor or a cylinder. However, when the actuator is stopped due to some abnormality or the like, it is necessary to manually operate the shift rod. Patent Document 1 proposes a tool that can be used when manually performing a shift operation in place of an actuator. The tool is a manual shift operation tool for a transmission that performs a select operation for moving the shift rod in the axial direction and a shift operation for rotating the shift rod. The tool is configured to engage a rod member with the end of the shift rod, manually press and rotate the rod member in place of the actuator, and thereby switch the gear stage.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The tool described in Patent Document 1 is configured to perform shift operations by connecting a rod member to the shift rod, allowing for manual operation without directly touching the transmission itself, such as the shift rod. However, manual operation of the rod member involves pressing in the axial direction and rotating around the central axis, which is no different from operation by an actuator. Therefore, the operator must exert the same operating force as with an actuator, which increases the burden on the operator, and there is still much room for improvement in terms of workability.

[0005] This invention was made in view of the above-mentioned technical problems, and aims to provide an auxiliary jig for shifting gears that is easy to operate and convenient to use. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a gear shift assist jig for performing gear shift operations on a transmission, wherein one end of a bendable link that rotates with a predetermined pivot point located laterally to the shift rod is connected to the end of a shift rod that moves back and forth in the axial direction to perform gear shifts, and the other end of the bendable link is connected to the rod of a linear actuator that is positioned perpendicular to the axial direction of the shift rod, comprising: a main body with one end serving as an operating gripping portion; a first operating portion formed at the other end of the main body and abutting against the tip of the rod of the actuator; and the operating gripping portion and the first operating portion The present invention features a second operating portion that protrudes from the main body and selectively engages with a first connection point between the shift rod and the bending link and a second connection point between the bending link and the rod of the actuator, and a third operating portion that protrudes from the main body and abuts against the tip of the shift rod, wherein the second operating portion engages with the first connection point when the first operating portion abuts against the tip of the rod of the actuator, and the third operating portion abuts against the tip of the shift rod when the second operating portion is engaged with the second connection point. [Effects of the Invention]

[0007] According to the present invention, when the first operating part is brought into contact with the tip of the rod of the actuator and the second operating part is engaged with the first connecting part, and the operating gripping part is pulled up in the direction of extension of the shift rod, the auxiliary jig functions as a lever with the first operating part as the fulcrum, the second operating part as the point of application of force, and the gripping operating part as the point of force application, causing the shift rod to be pulled up in its axial direction and the rod of the actuator to be pushed and displaced in the axial direction. Furthermore, when the second operating part is engaged with the second connecting part and the third operating part is brought into contact with the tip of the shift rod, and the operating gripping part is pushed down in the axial direction of the shift rod, the auxiliary jig functions as a lever with the second operating part as the fulcrum, the third operating part as the point of application of force, and the gripping operating part as the point of force application, causing the shift rod to be pushed down in its axial direction and the rod of the actuator to extend in the axial direction. In other words, according to the present invention, the forward and backward movement of the shift rod in the axial direction can be performed with a single jig, and since the jig functions as a lever, the force required for operation is small. Ultimately, according to the present invention, an auxiliary jig for shifting gears that is easy to work with and lightweight can be obtained. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic front view showing one embodiment of the device. [Figure 2] This is a schematic diagram illustrating the operation of an embodiment of the present invention, and is a schematic diagram illustrating the procedure for pushing down the shift rod. [Figure 3] This is a schematic diagram illustrating the operation of an embodiment of the present invention, and is a schematic diagram illustrating the procedure for raising the shift rod. [Modes for carrying out the invention]

[0009] Next, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below are merely examples of how the present invention can be implemented and do not limit the invention.

[0010] Figure 1 shows an auxiliary jig 1, which is one embodiment of the present invention. The auxiliary jig 1 shown here is of a size and weight that can be carried and handled by hand, and is equipped with a main trunk 2 that is thick enough to be gripped by hand. The main trunk 2 is made of, for example, a metal pipe or metal rod, and one end thereof is an operating grip portion 3 over a predetermined length. For example, the operating grip portion 3 may be a part that has been treated to prevent slippage, such as by knurling or wrapping with rubber. The other end opposite to this is a first operating portion 4. As will be described later, this first operating portion 4 is a part that abuts against a metal part and applies a load, and therefore can be configured as a part that has been treated appropriately to prevent scratching and slipping.

[0011] A second operating section 5 is provided on the main trunk member 2, closer to the first operating section 4. The second operating section 5 serves as a fulcrum when performing work and applies load to the mating member. In the example shown in Figure 1, it consists of an arm section 5a extending perpendicularly from the main trunk member 2 and an engagement pin 5b provided at the tip of the arm section 5a, extending parallel to the main trunk member 2. The engagement pin 5b may be, for example, a bolt with its tip screwed to the arm section 5a.

[0012] A third operating section 6 is provided adjacent to the second operating section 5. In the example shown in Figure 1, the third operating section 6 is located closer to the operating grip section 3 than the second operating section 5. The third operating section 6 is the part that contacts the mating member and applies pressing force, and in the example shown in Figure 1, it is composed of a shaft member 6a that extends from the main trunk member 2 almost parallel to the arm section 5a.

[0013] The auxiliary jig 1 described above is used when manually shifting gears in a transmission equipped with a meshing engagement mechanism such as a dog clutch. In such a transmission, the dog teeth move back and forth as the shift rod moves axially, causing engagement or disengagement. For example, if the shift rod is moved back and forth by a predetermined actuator in a non-driven state for evaluation purposes, and engagement fails due to the dog teeth colliding, the actuator is stopped and the shift rod is moved back and forth manually. The auxiliary jig described above can be used for such manual gear changes. An example is described below.

[0014] Figures 2 and 3 are schematic diagrams illustrating the procedure for shifting gears using the auxiliary jig 1 described above, with the transmission 7 set so that the shift rod 8 is facing upward. A link mechanism 9 is provided to move the shift rod 8 back and forth in the axial direction (i.e., vertical direction). The link mechanism 9 is configured to move the shift rod 8 up and down by a linear actuator 10 and is held by a base (or stay) 11 that surrounds the shift rod 8. The bent portion of a bent link 12, which is bent in an L-shape or V-shape, is rotatably attached to the base 11 by a predetermined pin or the like.

[0015] One end of the bendable link 12 is rotatably connected to the tip of the shift rod 8 by a clevis joint or the like. Similarly, the other end of the bendable link 12 is rotatably connected to the tip of the rod 10a in the actuator 10 by a clevis joint or the like. The actuator 10 is a linear-acting type in which the rod 10a, such as an air cylinder, moves back and forth in its axial direction, and is held so as to be able to rotate about an axis perpendicular to its axial direction or the direction of the rod 10a's back and forth movement. In other words, the tip of the rod 10a can move up and down in conjunction with the rotation of the bendable link 12.

[0016] If the actuator 10 stops working and the shift rod 8 needs to be moved manually, as shown in Figure 2, the engagement pin 5b of the second operating part 5 is engaged from below with the connection point between the rod 10a of the actuator 10 and the bending link 12 (the second connection point in this invention), and the tip of the third operating part 6 (the lower end in the figure) is brought into contact with the tip of the shift rod 8. In this state, the operating grip part 3 of the main trunk member 2 is grasped by hand and pushed down in the direction indicated by the arrow in Figure 2. The connection point where the engagement pin 5b is hooked cannot move vertically, while the shift rod 8 can move vertically. Therefore, the auxiliary jig 1 functions as a lever with the second operating part 5 (especially its engagement pin 5b) as the fulcrum, the third operating part 6 as the point of application, and the operating grip part 3 as the point of force application. That is, by pushing down the operating grip part 3, the force is amplified and acts on the third operating part 6, pushing down the shift rod 8. In other words, the shift rod 8 can be pushed down with a small force. Furthermore, since you won't be directly touching the shift rod 8, there's no need to prepare gloves or anything to prevent burns.

[0017] When pulling up the shift rod 8, as shown in FIG. 3, the first operation portion 4 provided at the tip of the main body member 2 is abutted against the connecting portion between the end of the bending link 12 and the rod 10a of the actuator 10 or the tip of the rod 10a, and the engaging pin 5b in the second operation portion 5 is engaged with the connecting portion between the tip of the shift rod 8 and the end of the bending link 12 (the first connecting portion in the present invention). In this state, grasp the operation grip portion 3 of the main body member 2 by hand and pull it up in the direction indicated by the arrow in FIG. 3. The shift rod 8 with the engaging pin 5b hooked thereon is movable up and down, and the first operation portion 4 at the tip of the main body member 2 is engaged with the tip of the rod 10a of the actuator 10 or the end of the bending link 12 and cannot move in the vertical direction. Therefore, the auxiliary jig 1 functions as a lever with the first operation portion 4 as a fulcrum, the second operation portion 5 (particularly its engaging pin 5b) as a point of action, and the operation grip portion 3 as a point of force. That is, by pulling up the operation grip portion 3, the force is amplified and acts on the second operation portion 5, and the shift rod 8 is pulled up. That is, the shift rod 8 can be pulled up with a small force. Also, of course, since it does not directly touch the shift rod 8, there is no need to prepare gloves or the like to prevent burns.

[0018] As described above, when moving the shift rod 8 back and forth in its axial direction using the auxiliary jig 1, since the auxiliary jig 1 functions as a lever, the shift rod 8 can be easily moved with a small force, and since the auxiliary jig 1 does not have a movable part, the overall configuration becomes simple. Eventually, according to the present invention, an auxiliary jig for shift change with excellent operability and portability can be obtained.

[0019] Note that the present invention is not limited to the specific examples described above, and the positions and shapes of the operation portions 4, 5, and 6 may be according to the positions and shapes of the mating members with which they contact or engage.

Explanation of Reference Numerals

[0020] 1 Auxiliary jig 2 Main body member 3 Operation grip portion 4 First operation portion 5 Second operating part 5a Arm part 5b Engagement pin 6 Third operating part 6a Shaft member 7 Transmission 8 Shift rod 9 Link mechanism 10 Actuator 10a Rod 11 Base part 12 Bent link

Claims

[Claim 1] A gear shift assist jig for performing gear shift operations on a transmission, wherein one end of a bendable link that rotates with respect to a predetermined position separated to the side of the shift rod is connected to the end of a shift rod that moves back and forth in the axial direction to perform gear shifts, and the other end of the bendable link is connected to a rod of a linear actuator that is positioned perpendicular to the axial direction of the shift rod, A main trunk member with one end designated as an operating gripping part, A first operating portion is formed at the other end of the main body and abuts against the tip of the rod of the actuator, A second operating portion is provided between the operating grip portion and the first operating portion, protruding from the main body, and selectively engaging with the first connection point between the shift rod and the bending link, and the second connection point between the bending link and the rod of the actuator, It has a third operating portion that protrudes from the main trunk member and abuts against the tip of the shift rod, The configuration is such that the first operating part abuts against the tip of the rod of the actuator, the second operating part engages with the first connecting point, and the third operating part abuts against the tip of the shift rod while the second operating part is engaged with the second connecting point. A gear shift assist jig characterized by the following features.

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