JP2009085284A - Pin connecting structure and operation device of transmission with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin connecting structure capable of preventing rattling of a pin connecting part in the rotational direction, and especially, an operation device of a transmission equipped with the pin connecting structure. <P>SOLUTION: In the pin connecting structure 20, a shift and select shaft 8 and a shift housing 10 are connected through a pin 9 inserted in the radial direction, and the shafts 8 and 10 are interlocked along the axial direction and the shaft rotational direction. The pin 9 is clearance-fitted to the shift housing (one shaft) 10, and is press-fitted and clearance-fitted or press-fitted to the shift and select shaft 8. The pin connecting structure 20 is equipped with a torsion spring (elastic member) 11 interposed between the shift housing 10 and the pin 9 and effecting the resilient force to the shaft circumferential direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pin connection structure, and more particularly to a pin connection structure applied to an operating device for a manual transmission for an automobile, and more particularly to a structure for preventing rotation in a rotation direction of a pin connection portion.

With reference to Patent Document 1, in a manual transmission for an automobile, the manual transmission main body and the shift lever are pin-connected so that the transmission operates smoothly when the shift lever is operated. Since the fitting between the transmission main body and the pin coupling portion of the shift lever needs to be a clearance fit in consideration of the variation in component dimensions, play occurs in the pin coupling portion. The play is transmitted, and the play is generated in the knob portion of the shift lever. In particular, the backlash in the rotational direction (circumferential direction) significantly increases the backlash in the select direction of the knob portion, thus deteriorating the shift feeling.
Japanese Patent Laid-Open No. 2001-12487 (see pin 30 in FIG. 4)

  FIG. 3A is an overall view for explaining the structure of the pin connecting portion in the manual transmission operating device according to the conventional example, and FIG. 3B is a rear view of the shift lever of FIG. FIG. FIG. 4 is an enlarged view of the pin connecting portion of FIG. 5 is a cross-sectional view taken along the line AA in FIG.

  Referring to FIG. 3, the shift lever 1 is pin-connected by a pin 5 to a shift and select shaft 4 via a shift shaft 2 and a shift housing 3. By this pin connection, a shift force or a select force along the axial circumferential direction (axial rotation direction) is transmitted to the shift and select shaft 4 from the manually operated shift lever 1 along the axial movement direction.

  In particular, referring to FIG. 4 and FIG. 5, in the pin connection portion, the fit between the hole 3 a formed in the shift housing 3 and the pin 5 needs to take into account the variation in component dimensions, and therefore a clearance fit is necessary. It is. If the pin 5 is press-fitted into the hole 3a, the pin coupling portion cannot move freely, and thus cannot be shifted.

  On the other hand, in the pin connecting portion, the fit between the hole 4a formed in the shift and select shaft 4 and the pin 5 may be press-fitting, but in order to improve the workability of the assembly, it is press-fitting to a clearance fit. When the clearance fit is performed, the collar 7 is fitted on the outer peripheral surface of the shift housing 3 and the both end surfaces of the pin 5 to prevent the pin 5 from falling off.

  According to the structure of the pin connecting portion according to the conventional example described above, the play in the select direction is generated in the knob portion 1a of the shift lever 1 due to the rotational direction (circumferential direction) clearance generated between the shift housing 3 and the pin 5. , Worsen the shift feeling. Here, the selection direction backlash of the knob portion 1a can be expressed as “knob portion selection direction backlash = pin backlash × shift lever length / pin length”. Referring to the above formula, it can be seen that the backlash of the pin portion significantly worsens the backlash of the knob portion.

  An object of the present invention is to provide a pin connection structure in which the rotation direction or circumferential play of the pin connection portion is prevented, and in particular, an operation device for a transmission including the pin connection structure.

In the first aspect, the present invention is a pin connection structure in which both shafts are connected via a pin inserted in the radial direction, and the both shafts are interlocked along the axial direction and the axial circumferential direction. The pin is provided with an elastic member that is clearance-fitted to at least one of the two shafts and that acts an elastic force along the circumferential direction of the shaft between the one shaft and the pin. A pin connection structure is provided.
According to a second aspect of the present invention, a shift lever that is shifted or selected and a shift lever that is directly or indirectly connected to the shift lever and that is displaced along the axial direction in conjunction with the shift lever and that is A shift-and-select shaft that sets a gear position of the transmission main body by swinging along a direction, and an operation device of the transmission, between the shift lever and the shift-and-select shaft, Provided is a transmission operating device having a pin connection structure according to a first aspect.

  According to the present invention, the elastic means such as the torsion spring is rotated in the axial direction (axial circumferential direction) by the elastic force acting along the axial circumferential direction with respect to the pin that is clearance-fitted to connect the shafts. ) Generation of play is prevented, and in particular, when a load equal to or less than a predetermined load is applied to the shaft, there is no play in the shaft rotation direction. When the pin connection structure of the present invention is applied to an operation device of a transmission, particularly a pin connection between a shift and select shaft and a shift lever, generation of play in the select direction of the shift lever is prevented, and in particular, a predetermined load or less. Is applied to the shift and select shaft or shift lever, there is no backlash in the select direction, resulting in improved shift feeling.

  In a preferred embodiment of the present invention, the one shaft is formed with a hole into which the pin is clearance-fitted, the elastic member is a torsion spring, and both ends of the torsion spring are inserted into the hole, respectively. The pin is held between the pin and the one shaft, and the spring portion of the torsion spring extends around the outer periphery of the one shaft.

  In a preferred embodiment of the present invention, the hole formed in the one shaft communicates with each other, and a large circle portion into which the pin is inserted, and a small circle portion into which both ends of the torsion spring are inserted. Have. Thereby, the pin connection structure is made compact.

  In a preferred embodiment of the present invention, the both end portions of the torsion spring and the leg portions connecting the spring portions extend close to both end surfaces of the pin. As a result, the torsion spring also serves as a pin drop-off prevention member, and it is not necessary to provide a separate drop-off prevention member, thereby reducing the cost.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged view of a pin connection part in a pin connection structure according to an embodiment of the present invention. FIG. 2 is a top view of FIG. The pin connection structure shown in FIG. 1 or the like is, for example, in an operating device for a manual transmission having the basic configuration shown in FIGS. 3 (A) and 3 (B). Applied to the connection structure between.

  Referring to FIGS. 1 and 2, a pin connection structure 20 according to an embodiment of the present invention connects both shafts of a shift-and-select shaft 8 and a shift housing 10 via pins 9 inserted in the radial direction. Both shafts 8 and 10 are interlocked along the axial direction and the axial circumferential direction. The pin 9 is fit into the shift housing (one shaft) 10 and is fit into the shift and select shaft 8. The pin connection structure 20 includes a torsion spring (elastic member) 11 that acts between the shift housing 10 and the pin 9 along the axial circumferential direction.

  As shown in FIG. 3A, the shift housing 10 is connected to a shift lever 1 that is shifted or selected. Thus, the pin connection structure 20 indirectly connects the shift lever 1 and the shift and select shaft 8 via the shift housing 10, and the shift and select shaft 8 is linked to the shift lever 1 along the axial direction. The gear position of the transmission main body is set by displacing it and swinging it along the circumferential direction of the shaft.

  At the hollow end portion of the shift housing 10, holes 10 a into which the both ends of the pin 9 are clearance-fitted are formed so as to be inserted in the radial direction, and the shift and select shaft 8 inserted into the hollow end portion of the shift housing 10. A hole 8a into which an intermediate portion of the pin 9 is press-fitted to a clearance fit or press-fitted is formed in the end portion so as to be inserted in the radial direction.

  Both end portions 11 a and 11 a of the torsion spring 11 are inserted into the hole 10 a and are sandwiched between the pin 9 and the shift housing 10, and the spring portion 11 c of the torsion spring 11 extends around the outer periphery of the shift housing 10.

  In the torsion spring 11, leg portions 11 b and 11 b connecting both end portions 11 a and 11 a and the spring portion 11 c extend close to both end surfaces of the pin 9 and function to prevent the pin 9 from falling off. . As a result, it is not necessary to provide a separate member for preventing the pin 9 from falling off, so the cost is reduced.

  In particular, referring to FIG. 2, the hole 10 a of the shift housing 10 has a daruma-shaped opening cross section, and a pin 9 is inserted into the large circle portion 10 b of the hole 10 a, so Both end portions 11a and 11a of the torsion spring 11 are inserted into the circular portion 10c. Thus, the pin connection structure 20 is made compact by inserting the pin 9 and the torsion spring 11 adjacent to one hole 10a.

  Next, the function of the pin connection structure according to one embodiment of the present invention described above will be described. Referring to the configuration according to the embodiment shown in FIGS. 1 and 2 and the basic configuration of the transmission operating device shown in FIGS. 3 (A) and 3 (B), the torsion spring 11 has its elastic force. 1 acts on the inner wall of the hole 10a of the shift housing 10 along the arrow F direction shown in FIG. 1, that is, along the axial circumferential direction of the shift and select shaft 8 and the shift housing 10. Due to this elastic force, the pin 9 is pressed against the shift housing 10, and the axial circumferential direction of the pin 9, that is, the selection direction play of the knob portion 1a of the shift lever 1 (see FIG. 3B) is prevented. In particular, when a load equal to or less than a predetermined load compared to the elastic force of the torsion spring 11 is applied to the pin 9 or the like, there is no backlash in the select direction, and the shift feeling is improved.

  The pin connection structure of the present invention is preferably applied to a device for connecting or interlocking shafts in the axial movement direction and the axial circumferential direction (around the shaft) via pins, and in particular, an operation device of a transmission, especially a shift The present invention is preferably applied to a connection structure between the lever and the shift and select shaft.

In the pin connection structure concerning one Example of this invention, it is an enlarged view of a pin connection part. FIG. 2 is a top view of FIG. 1. (A) is a whole view for demonstrating the structure of the pin connection part in the operating device of the manual transmission which concerns on a prior art example, (B) is a shift lever rear view of (A). FIG. 4 is an enlarged view of the pin connecting portion of FIG. 5 is a cross-sectional view taken along the line AA in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shift lever 2 Shift shaft 3 Shift housing 3a Hole 4 Shift and select shaft 4a Hole 5 Pin 6 Manual transmission main body 7 Collar 8 Shift and select shaft 8a Hole 9 Pin 10 )
10a hole 10b large circle portion 10c small circle portion 11 torsion spring (elastic means)
11a, 11a Both ends 11b, 11b Leg 11c Spring (coil)
20-pin coupling structure (shaft coupling structure, shaft coupling)

Claims (5)

It is a pin connection structure in which both shafts are connected via a pin inserted in the radial direction, and the both shafts are interlocked along the axial direction and the axial circumferential direction,
The pin is clearance-fitted to at least one of the two shafts;
An elastic member is interposed between the one shaft and the pin, and an elastic member acting elastic force along the circumferential direction of the shaft. The one shaft is formed with a hole into which the pin is clearance-fitted,
The elastic member is a torsion spring, and both end portions of the torsion spring are inserted into the hole and sandwiched between the pin and the one shaft, and the spring portion of the torsion spring is around the outer periphery of the one shaft. Extending to the
The pin connection structure according to claim 1. The hole formed in the one shaft has a large circular portion that is in communication with each other and into which the pin is inserted, and a small circular portion into which both ends of the torsion spring are inserted.
The pin connection structure according to claim 2. Leg portions connecting the both end portions of the torsion spring and the spring portion respectively extend close to both end surfaces of the pin,
The pin connection structure according to claim 2. A shift lever that is shifted or selected, and directly or indirectly connected to the shift lever, and is displaced along the axial direction in conjunction with the shift lever and swings along the circumferential direction of the shaft. A shift-and-select shaft for setting a gear position of the transmission main body, and an operation device for the transmission,
An operation device for a transmission, comprising the pin coupling structure according to any one of claims 1 to 4 between the shift lever and the shift and select shaft.

Images