JP5114521B2 - Open-end wrench for tie rod adjustment - Google Patents

Description

  The present invention relates to a tie rod adjusting open end wrench for rotating a tie rod hexagonal portion of a toe adjusting tie rod of an automobile.

  Conventionally, an open-end wrench that can automatically perform toe adjustment by rotating a tie rod hexagonal portion 12 of a toe adjustment tie rod 10 of an automobile and expanding and contracting the tie rod 10 shown in FIG. 6 has been developed. (For example, refer to Patent Document 1 and Patent Document 2).

JP 2000-289640 A JP 2004-17907 A

However, the conventional open-end wrench for adjusting the tie rod transmits a rotational force to the tie rod hexagonal portion 12 by an abutting portion that abuts across one surface of the tie rod hexagonal portion 12 or two continuous surfaces. Although the tie rod hexagonal portion 12 having a specified diameter can be reliably rotated, the tie rod hexagonal portion 12 having various diameters that are different for each vehicle is insufficiently gripped, or the tie rod hexagonal portion is different. Since the center of 12 is gripped in a state shifted from the center of rotation, it is difficult to reliably rotate the tie rod hexagonal portion 12.
The present invention has been made in view of the above problems, and its object is to securely grip the tie rod hexagonal portion so that the center of the tie rod hexagonal portion of a tie rod having a different diameter is always located at the center of rotation. It is to perform toe adjustment of an automobile quickly and accurately by reliably rotating.

In order to solve the above-mentioned problem, an open-end wrench for adjusting a tie rod according to an embodiment of the present invention includes a clamping means for approaching the tie rod from the side of the tie rod and clamping the tie rod hexagonal portion, and a tie rod hexagonal portion. A tie rod adjusting open end wrench comprising rotation driving means for rotating the clamping means in a state where
Open end for adjusting tie rods by appropriately changing the width of two faces of a pair of abutting portions facing each other to directly abut the tie rod hexagonal portion and sandwiching the tie rod hexagonal portion by the pair of abutting portions The wrench is versatile, and the tie rod hexagonal portion can be securely clamped regardless of the diameter of the tie rod, and the tie rod hexagonal portion can be rotated.

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.

(1) A tie rod provided with clamping means for clamping the tie rod hexagonal part by approaching the tie rod from the side of the tie rod, and rotation driving means for rotating the clamping means while clamping the tie rod hexagonal part An open-end wrench for adjustment,
The clamping means includes a pair of abutting portions opposed to each other for directly abutting the tie rod hexagonal portion, and an opening / closing drive mechanism for the pair of abutting portions to move apart and approach the tie rod hexagonal portion. A tie rod adjusting open-end wrench comprising a mechanism that operates in conjunction with the rotation driving means .

  The open-end wrench for tie rod adjustment described in this section has a pair of abutment portions opposed to each other so that the clamping means directly abuts against the hexagonal portion of the tie rod, and the pair of abutment portions interlocks with each other so that the tie rod Since the opening / closing drive mechanism for separating and approaching the hexagonal portion is provided, the tie rod hexagonal portion can be paired regardless of the diameter of the tie rod by appropriately changing the width of the two surfaces of the pair of abutting portions facing each other. Is securely held by the contact portion. Then, the tie rod hexagonal portion is rotated by rotating the clamping means by the rotation driving means, and the toe is adjusted.

In addition, the open-end wrench for adjusting the tie rod described in this section can appropriately change the two-face width of a pair of abutting portions facing each other by operating the opening / closing drive mechanism of the clamping means in conjunction with the rotation drive means. Regardless of the diameter of the tie rod, the tie rod hexagonal part is securely clamped and the tie rod hexagonal part is rotated.

Further, in the above (1), the clamping means includes a pair of slide plates that are separated from each other by a sliding operation as the opening / closing drive mechanism, and end surfaces of the pair of slide plates facing each other as the contact portion. There is configured a plane parallel with each other, the rotary drive means, the pair of sliding plates, the open-end wrench tie rod adjustment is for driving rotation around the central axis of the tie rod hexagonal portion (claim 1) .

Therefore , the open-end wrench for tie rod adjustment described in this section is configured such that the end surfaces of the slide plates that are configured in a plane parallel to each other of the pair of slide plates are in contact with the hexagonal portions of the tie rods. The tie rod hexagonal part is securely clamped regardless of the tie rod diameter.
Then, by driving the pair of slide plates around the central axis of the tie rod hexagonal portion by the rotation driving means in a state where the tie rod hexagonal portion is sandwiched between the opposing end surfaces of the slide plates as the contact portions, The hexagonal part is rotated.

( 2 ) In the above item ( 1 ), the rotation driving means includes an annular external gear provided at a position surrounding the clamping means, a cam plate closing one end face of the annular external gear, and the cam plate A cam surface which is an end surface of an opening provided in the central portion of the ring and a pair of slide plates which project from the pair of slide plates and abut against the cam surfaces of the cam plates to cause the pair of slide plates to rotate. The annular external gear has a C-shape with a part cut away, and the cut-out part is an open end part when approaching the tie rod from the side of the tie rod. The rotation drive means is provided with a gear train for rotating the annular external gear, and the clamping means normally uses the pair of slide plates as the opening / closing drive mechanism. A spring urging in the time-opening direction; a pair of slide plates; and a rotating plate that supports the spring inside the annular external gear so as to be relatively rotatable, the follower being a cam surface of the cam plate by moving along, the annular external gear and the phase difference between the rotating plate is intended to be converted to opening and closing operation of the pair of slide plate tie rod adjustment open-end wrench (claim 2) .

  In the open-end wrench for tie rod adjustment described in this section, a pair of slide plates and springs constituting a clamping means are supported by a rotating plate so as to be relatively rotatable with respect to the annular external gear, and the pair of slide plates are The spring is normally biased in the opening direction. Further, the annular external gear provided at a position surrounding the clamping means has a C-shape with a part cut away, and the cut-out part is an open end when approaching the tie rod from the side of the tie rod. It is arranged in the part. Therefore, the tie rod hexagonal portion having the maximum allowable diameter can be drawn into the open end portion in a state where the pair of slide plates are farthest apart.

  When the annular external gear is rotationally driven by the gear train of the rotational drive means, the rotational phase of the annular external gear and the rotational plate changes, protrudes from the pair of slide plates, and contacts the cam surface of the cam plate. The follower is guided by the cam surface of the cam plate that closes one side end surface of the annular external gear, and converts the rotation of the annular external gear into an opening / closing operation of the pair of slide plates. That is, the tie rod hexagonal portion is connected to the tie rod hexagonal portion regardless of the size of the tie rod by bringing the opposing end surfaces of the slide plates configured in parallel with each other into contact with the tie rod hexagonal portion in conjunction with the rotation driving means. Hold securely.

  Further, when the opposing end surfaces of each slide plate abut on the tie rod hexagonal portion, the movement of the follower protruding from the pair of slide plates is restricted with respect to the cam surface of the cam plate. In contrast, the rotation is driven by the cam plate without sliding, and the rotation of the annular external gear is transmitted to the pair of slide plates. Therefore, the pair of slide plates and the rotating plate that supports the slide plates rotate integrally with the annular external gear. Thus, the tie rod hexagonal portion is rotated by driving the pair of slide plates around the central axis of the tie rod hexagonal portion.

( 3 ) In the above item ( 1 ), the rotation driving means includes an annular sun gear provided at a position surrounding the clamping means, a planetary gear positioned radially outward of the sun gear, and the planetary gear. And an annular outer ring gear positioned radially outward. The sun gear and the outer ring gear have a C-shape in which a part thereof is cut out, and the cut-out part is a tie rod from the side of the tie rod. Is disposed in the open end portion when approaching the gear, and teeth are formed on the inner peripheral surface of the sun gear and the outer peripheral surface of the outer ring gear, and a gear train that drives the teeth on the outer peripheral surface of the outer ring gear is provided. The clamping means, as the opening / closing drive mechanism, is pivotally supported around the central axis of the hexagonal portion of the tie rod together with the pair of slide plates on the base end side of the pair of slide plates. A tie rod adjusting open end wrench comprising a slide plate drive gear meshing with teeth formed on the inner peripheral surface of the positive gear, and a link mechanism for converting the rotation operation of the slide plate drive gear into the slide operation of the pair of slide plates (Claim 3 ).
The open-end wrench for tie rod adjustment described in this section has a C-shape in which both an annular sun gear and an annular outer ring gear provided at a position surrounding the clamping means are partially cut out, The notch is disposed at the open end when the tie rod approaches the tie rod from the side of the tie rod. Therefore, the tie rod hexagonal portion having the maximum allowable diameter can be drawn into the open end portion in a state where the pair of slide plates are farthest apart.

Then, when the annular outer ring gear is rotationally driven by the gear train of the rotation driving means in a state where the revolution of the planetary gear is stopped and can rotate, the rotation of the annular outer ring gear is transmitted to the annular sun gear, and the sun gear The slide plate drive gear that meshes with the teeth formed on the inner peripheral surface of the shaft rotates. Then, the rotation operation of the slide plate drive gear is converted into the slide operation of the pair of slide plates by the link mechanism. That is, the tie rod hexagonal portion is connected to the tie rod hexagonal portion regardless of the size of the tie rod by bringing the opposing end surfaces of the slide plates configured in parallel with each other into contact with the tie rod hexagonal portion in conjunction with the rotation driving means. Hold securely.
Further, the opposing end surfaces of each slide plate abut on the hexagonal portion of the tie rod and the pair of slide plates stop, thereby restricting the rotation of the slide plate drive gear, and the slide plate drive gear, the annular sun gear, and the planetary gear. Are integrally rotated with the annular outer ring gear in a locked state. At this time, the pair of slide plates and the slide plate drive gear also rotate around the central axis of the tie rod hexagonal portion together with the annular outer ring gear to rotate the tie rod hexagonal portion.

  Since the present invention is configured as described above, the tie rod hexagonal portion of a tie rod having a different diameter is securely gripped so that the center of the tie rod is always located at the center of rotation, and the tie rod hexagonal portion is reliably rotated, so that Adjustments can be made quickly and accurately.

It is a front view of the open end wrench for tie rod adjustment which concerns on the reference example of this invention. FIG. 2 is a side view of the tie rod adjusting open end wrench shown in FIG. 1. The principal part of the open end wrench for tie rod adjustment which concerns on the 2nd reference example of this invention is shown, (a) is an exploded view, (b) is a completion figure. It is a principal part exploded view of the open end wrench for tie rod adjustment which concerns on the 1st Embodiment of this invention. It is a front view which shows the internal structure of the open end wrench for tie rod adjustment which concerns on the 2nd Embodiment of this invention. It is a figure which shows the tie rod for toe adjustment of a motor vehicle.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Detailed description of the same or corresponding parts as those of the prior art will be omitted.
1 and 2 show a tie rod adjusting open-end wrench 14 (hereinafter simply referred to as “open-end wrench”) according to a reference example of the present invention. The open end wrench 14 approaches the tie rod from the side of the tie rod 10 (see FIG. 6), and sandwiches the tie rod hexagonal portion 12 (see FIG. 6) and the tie rod hexagonal portion 12 And a rotation driving means 18 for rotating the clamping means 16. In addition, the clamping means 16 is configured so that the pair of abutting portions 20 that are in direct contact with the tie rod hexagonal portion 12 and the pair of abutting portions 20 are interlocked with each other so as to move away from the tie rod hexagonal portion. Open / close drive mechanism 22. The opening / closing drive mechanism 22 of the clamping means 16 includes a mechanism that operates independently of the rotation drive means 18. Note that the clamping means 16 is disposed in the open end portion O of the open end wrench 14.

More specifically, the clamping means 16 includes a pair of arms 24, a linear actuator 26, and a link mechanism 28 that converts the operation of the linear actuator 26 into an opening / closing operation of the pair of arms 24 as the opening / closing drive mechanism 22. ing. The pair of arms 24 is a pair of gear trains 34 constituting the rotation driving means 18 by a V-shaped bracket 32 provided at the tip of a base plate 30 fixed to the tip 29 of the robot arm of the multi-axis robot. The gear 34 </ b> D is mounted coaxially with the rotation shaft 36. The link mechanism has a base end portion of the pair of arms 24 and a piston rod 26 a of a linear actuator (air cylinder) 26 fixed to the base plate 30, and is pivotally attached via a connecting rod 38 and pivots 40 and 42. Is.
Therefore, as the pair of arms 24 expands and contracts the piston rod 26a of the linear actuator 26, the distal ends thereof are separated from each other with the fulcrum (rotating shaft 36) as the rotation center. In FIG. 1, the state in which the distal end portions of the pair of arms 24 are farthest (standby state) is a solid line, the distal end portions of the pair of arms 24 approach, and the pair of contact portions 20 are connected to the tie rod hexagonal portion 12. The abutting state is indicated by a two-dot chain line.

  Each of the pair of arms 24 is fitted with a gear 34E that is arranged so as to always mesh with the gear 34D by a rotating shaft 44, and further, a friction that constitutes the contact portion 20 so as to be rotatable integrally with the gear 34E. A car 46 is attached to the shaft. The friction wheel 46 is appropriately processed to increase the friction coefficient of the surface, such as a surface with irregularities such as serrations or knurls, a sandblasted surface, or a surface covered with a urethane layer. What has been made is used.

On the other hand, the rotation driving means 18 includes a gear train 34 and a drive shaft 48 connected to the rotation shaft of the motor, and gears 34A, 34B, 34C (all shown only in FIG. 1) constituting the gear train 34 are in series. Arranged on the base plate 30 and meshed in this order. The pair of gears 34D that are pivotally attached to the V-shaped bracket 32 by the rotation shaft 36 are arranged at the same distance from the gear 34C and mesh with the gear 34C. A friction wheel 46 is pivotally mounted so as to rotate integrally with the gear 34C. On the other hand, a motor (servo motor) coupled to the drive shaft 48 is also fixed to the base plate 30 as appropriate. By driving the drive shaft 48 by the motor, the power of the motor is transmitted by the gear train 34, and the three friction wheels 46 that rotate integrally with the gear 34C and the gear 34E are all rotated at the same speed in the same direction. It is possible.
FIG. 1 schematically shows a linear actuator 26, a motor 49 that drives a drive shaft 48, and a control device 50 that controls the operation of the linear actuator 26 and the motor 49. The control device 50 can be configured by an electronic computer such as a personal computer. And the operation | movement of each part of the open end wrench 14 is automatically performed in the procedure demonstrated below.

Here, the toe adjustment procedure of the automobile using the open-end wrench 14 will be described with reference to FIGS.
(S1) The vehicle is conveyed to the toe adjustment facility. Note that the toe adjustment facility includes an operation panel and an alignment measuring device.
(S2) The start switch of the operation panel is operated by the operator.
(S3) The robot arm operates, the open end wrench 14 approaches the tie rod from the side of the tie rod 10, and draws the open end portion O into the tie rod hexagonal portion 12. Then, the linear actuator 26 is operated by the control device 50, and the contact portion 20 (friction wheel 46) pivotally supported by the pair of arms 24 is brought into contact with the tie rod hexagonal portion 12. The stop position of the pair of arms 24 is determined by detecting the load of the linear actuator 26 or the like.
(S4) The toe angle is measured by the alignment measuring device.
(S5) The required amount of rotation is calculated by the control device 50. (S6) The motor 49 is operated by the control device 50 to rotate the three friction wheels 46, thereby rotating the tie rod hexagonal portion 12. At this time, the actuators 26 that drive the pair of arms 24 are passively operated so that the friction wheels 46 come into contact with the surface of the tie rod hexagonal portion 12 with an appropriate pressure. Is acceptable.
(S7) The toe angle is measured by the alignment measuring device.
(S8) Steps S5 to S7 are repeated until the toe angle becomes an appropriate value.
(S9) When the toe angle becomes an appropriate value, the linear actuator 26 is operated by the control device 50, the pair of arms 24 are opened, and the tie rod hexagonal portion 12 is opened. Then, the robot arm operates and the open end wrench 14 returns to the standby position.

  Now, according to the reference example of the present invention configured as described above, the following operational effects can be obtained. The open end wrench 14 includes a pair of abutment portions 20 that face each other so that the clamping means 16 directly abuts the tie rod hexagonal portion 12, and the pair of abutment portions 20 interlock with the tie rod hexagonal portion 12. Since the opening / closing drive mechanism 22 for approaching and separating from each other is provided, the tie rod hexagonal portion 12 can be changed regardless of the diameter of the tie rod 10 by appropriately changing the width of the two surfaces of the pair of contact portions 20 facing each other. The pair of contact portions 20 are securely clamped. The tie rod hexagonal portion 12 is rotated by rotating the clamping means 16 by the rotation driving means 18 to adjust the toe. The opening / closing drive mechanism 22 of the clamping means 16 operates independently of the rotation drive means 18.

In addition, the open end wrench 14 causes the friction wheel 46 supported on each of the pair of arms 24 to abut the tie rod hexagonal portion 12 by the linear actuator 26 moving the tip portions of the pair of arms 24 apart from each other. The tie rod hexagonal portion 12 can be securely clamped regardless of the diameter of the tie rod 10. The tie rod hexagonal portion 12 can be rotated by rotating the friction wheels 46 in the same direction and at the same speed by the gear train 34 of the rotation driving means 18 with the tie rod hexagonal portion 12 held by the friction wheel 46. it can.
Therefore, according to the open end wrench 14, the tie rod hexagonal portion 12 of the tie rods having different diameters is surely gripped so that the center is always located at the center of rotation, and the tie rod hexagonal portion 12 is reliably rotated. It becomes possible to perform toe adjustment quickly and accurately.

Next, a tie rod adjusting open end wrench 52 (hereinafter simply referred to as “open end wrench”) according to a second reference example of the present invention will be described with reference to FIG. Here, the same or corresponding parts as those of the open end wrench 14 according to the reference example of the present invention are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 3A shows an exploded view of the main part of the open end wrench 52, and FIG. 3B shows a completed view of the open end wrench 52.

The open / close drive mechanism 54 of the clamping means 16 of the open end wrench 52 includes a mechanism that operates independently of the rotation drive means 18, as in the open end wrench 14 according to the reference example.
Specifically, as the opening / closing drive mechanism 54, a pair of slide plates 56 that are separated from each other by a sliding operation, a linear actuator similar to the linear actuator 26 according to the reference example (see FIGS. 1 and 2), and the linear actuator 26 Are provided with a cam mechanism 58 that converts the above operation into an opening / closing operation of the pair of slide plates 56, and a spring 60 that constantly biases the pair of slide plates 56 in the opening direction. The pair of slide plates 56 and the spring 60 can be rotated around the central axis 12C of the tie rod hexagonal portion by an annular external gear 62 (tooth shape is omitted for convenience) arranged at a position surrounding them. Is retained. Further, the opposing end surfaces 64 of the pair of slide plates 56 form a flat surface parallel to each other, thereby constituting a contact portion for directly contacting the tie rod hexagonal portion 12. The annular external gear 62 has a C shape with a part cut away.

The rotation driving means 18 of the open-end wrench 52 includes an annular external gear 62, a gear train 34 for rotating the annular external gear 62, and a drive shaft 48 connected to the rotation shaft of the motor. Yes. The gear train includes a gear 34F fixed to a drive shaft 48 connected to a rotation shaft of the motor, and a pair of gears 34G disposed between the gear 34F and the annular external gear 62.
Furthermore, each component of the rotation drive means 18 and the opening / closing drive mechanism 54 is housed inside the base plate 65A and the plate cover 65B, and the cutout portion 62a of the annular external gear 62 is located on the side of the tie rod 12 (FIG. 6). Is disposed at the open end portion O of the base plate 65A and the plate cover 65B when approaching the tie rod. The linear actuator 26 (see FIGS. 1 and 2) and the motor are also fixed to the base plate 65A or the plate cover 65B. The base plate 65A and the plate cover 65B are provided with notches 651 and 652 for inserting the tie rod hexagonal portion 12.

The cam mechanism 58 of the opening / closing drive mechanism 54 is inclined so as to be in sliding contact with a pair of elevating cam plates 66 that are moved up and down by a cylinder rod 26a (see FIGS. 1 and 2) of the linear actuator 26 and inclined surfaces 66a facing each other of the elevating cam plates. A pair of transverse cam plates 68 having a surface 68a is included. The pair of lift cam plates 66 can only move up and down inside the base plate 65A and the plate cover 65B, and the lateral movement in FIG. 3 is restricted. Further, the pair of transverse cam plates 68 can only perform a transverse operation inside the base plate 65A and the plate cover 65B, and the vertical movement in FIG. 3 is restricted.
The cam mechanism 58 allows relative rotation of the pair of transverse cam plates 68 and the pair of slide plates 56, and transmits the opening / closing operation of the pair of transverse cam plates 68 to the pair of slide plates 56. The arcuate sliding contact surfaces 68b formed on the pair of transverse cam plates 68 and the end surfaces facing each other of the pair of slide plates 56 project in the direction of the central axis 12C of the tie rod hexagonal portion, and the arcuate sliding contact surfaces 68b An arcuate protrusion 56a that is in sliding contact is included.

  In the example of FIG. 3, when the pair of elevating cam plates 66 are lowered, the pair of transverse cam plates 68 slide in the approaching direction, and the operation of the pair of transverse cam plates 68 is performed by the arcuate sliding contact surface 68 b and the arcuate shape. It is transmitted to the pair of slide plates 56 via the protrusions 56a. Therefore, the pair of slide plates 56 slide in a direction approaching each other against the biasing force of the spring 60 in the opening direction, and the end surfaces 64 of the pair of slide plates 56 that are the contact portions are opposed to each other. The tie rod hexagonal portion 12 (FIG. 6) is brought into contact with the tie rod hexagonal portion 12 regardless of the diameter of the tie rod 10. When the gear train 34 is driven by the motor in this state, the annular external gear 62 rotates, and the pair of slide plates 56 and the spring 60 rotate around the central axis 12C of the tie rod hexagonal portion together with the annular external gear 62.

On the other hand, when the pair of elevating cam plates 66 rises, the pair of transverse cam plates 68 slide in a direction away from each other, and the pair of slide plates 56 slide in the opening direction by the biasing force of the spring 60 in the opening direction. To do.
The toe adjustment procedure of the automobile using the open end wrench 52 is the same as that of the open end wrench 14 according to the reference example, and detailed description thereof is omitted.

According to the second reference example of the present invention configured as described above, the following operational effects can be obtained. That is, in the open end wrench 52, a pair of slide plates 56 that are separated from each other by a sliding operation are constantly urged in the opening direction by the spring 60. Further, the annular external gear 62 arranged at a position surrounding the pair of slide plates 56 and the spring 60 has a C-shape in which a part thereof is notched, and the notch 62a is formed from the side of the tie rod. It is arrange | positioned at the open end part O when approaching. Therefore, the tie rod hexagonal portion 12 having the maximum allowable diameter can be drawn into the open end portion O in a state where the pair of slide plates 56 are most separated from each other.

Then, the operation of the linear actuator 26 (see FIGS. 1 and 2) is converted into an opening / closing operation of the pair of slide plates 56 by the cam mechanism 58, so that the slide plates 56 configured to be parallel to each other face each other. The end face 64 to be brought into contact with the tie rod hexagonal portion 12 can securely hold the tie rod hexagonal portion 12 regardless of the diameter of the tie rod 10.
Further, the open end wrench 52 is configured such that the annular external gear 62 is moved by the gear train 34 of the rotation driving means 18 in a state where the tie rod hexagonal portion 12 is sandwiched between the opposing end surfaces 64 of the slide plates which are contact portions. By driving, the pair of slide plates 56 rotatably held around the central axis 12C of the tie rod hexagonal portion 12 by the annular external gear 62 can be rotated, and the tie rod hexagonal portion 12 can be rotated.
In addition, detailed description of the same effects as the reference example is omitted.

Next, a tie rod adjusting open end wrench 70 (hereinafter simply referred to as “open end wrench”) according to the first embodiment of the present invention will be described with reference to FIG. Here, the same or corresponding parts as those of the open end wrench 14 and 52 according to the reference example and the second reference example of the present invention are denoted by the same reference numerals, and detailed description thereof is omitted.
The appearance of the open end wrench 70 according to the first embodiment of the present invention is the same as that of the open end wrench 52 according to the second reference example . Only an illustration is shown, and a completed drawing is omitted.

The open end wrench 70 according to the first embodiment of the present invention is different from the open end wrench 14 and 52 according to the reference example and the second reference example of the present invention in that the opening / closing drive mechanism 72 of the clamping means 16 is rotated. A mechanism that operates in conjunction with the driving means 18 is provided.
Specifically, the opening / closing drive mechanism 72 of the clamping means 16 includes a pair of slide plates 74 that are separated from each other by a sliding operation, and is opposed to each other so as to directly contact the tie rod hexagonal portion 12 (FIG. 6). As a pair of abutting portions, end surfaces 76 of the pair of slide plates facing each other are configured to be parallel to each other. The rotation driving means 18 is for rotating the pair of slide plates 74 around the central axis 12C of the tie rod hexagonal portion.

More specifically, the rotation driving means 18 includes an annular external gear 78 provided at a position surrounding the clamping means, a cam plate 80 that closes one end face of the annular external gear 78, and a central portion of the cam plate 80. The cam surface 82 which is an end face of the opening provided in the base plate and the pair of slide plates 74 protrude from the pair and come into contact with the cam surface 82 of the cam plate 80 to transmit the rotational operation of the annular external gear 78 to the pair of slide plates 74. For this purpose, a pin-shaped follower 84 and a gear train 34 for rotating the annular external gear 78 are provided. Similarly to the open end wrench 52 according to the second reference example of the present invention, the gear train 34 includes a gear 34F fixed to a drive shaft 48 connected to a rotation shaft of the motor, a gear 34F, and an annular external gear 78. And a pair of gears 34G disposed between the two. Also, the annular external gear 78 has a C-shape in which a part thereof is cut out, similarly to the annular external gear 62 of the open end wrench 52 according to the second reference example of the present invention. The notch 78a is disposed in the open end portion O of the base plate 65A and the plate cover 65B (see FIG. 3) when approaching the tie rod from the side of the tie rod 10. Further, the cam plate 80 is formed with a notch 801 for inserting the tie rod hexagonal portion 12, and a cam surface 82 is formed at the back of the notch 801.

Further, as the opening / closing drive mechanism 72 of the clamping means 16, a spring 86 that normally biases the pair of slide plates 74 in the opening direction, and the pair of slide plates 74 and the spring 86 can be rotated relative to the annular external gear 78. And the follower 84 moves along the cam surface 82 of the cam plate 80 so that the phase shift between the annular external gear 78 and the rotary plate 88 opens and closes the pair of slide plates 74. It is converted into motion.
In the drawing, a leaf spring 90 indicated by reference numeral 90 is fixed to the inner peripheral surface of the annular external gear 78 by a screw 92. When the leaf spring 90 abuts against the spring receiving surface 88a of the slide plate 88, the phase of the slide plate 88 with respect to the annular external gear 78 is constantly urged to the center position, and the leaf spring 90 is elastically deformed as appropriate. Thus, a phase shift between the annular external gear 78 and the rotating plate 88 is allowed.

The cam surface 82 of the cam plate 80 has a bilaterally symmetric shape similar to a star shape, and each follower of the pair of slide plates 74 when the phase of the slide plate 88 with respect to the annular external gear 78 is in the center position. 84 is located at each vertex of the star-shaped arm of the cam surface 82.
Here, when the gear train 34 is driven by the motor, the annular external gear 78 rotates, and the slide plate 88 rotates relative to the annular external gear 78. At this time, each follower 84 of the pair of slide plates 74 slides along the cam surface 82 from each vertex of the star-shaped arm of the cam surface 82 and moves toward the central axis 12C of the tie rod hexagonal portion. . Accordingly, the pair of slide plates 74 approach each other against the urging force of the spring 86 in the opening direction, and the opposing end surfaces 76 of the pair of slide plates 74 serving as contact portions are connected to the tie rod hexagonal portion 12 (see FIG. 6), the tie rod hexagonal portion 12 can be securely clamped regardless of the diameter of the tie rod 10. In this state, when the drive of the gear train 34 is continued by the motor, the annular external gear 78 rotates, and together with the annular external gear 78, the pair of slide plates 74 and the spring 86 rotate around the central axis 12C of the tie rod hexagonal portion. To do.

The above-described operation of the slide plate 74 occurs even if the annular external gear 62 is rotated in any direction because the cam surface 82 of the cam plate 80 has a symmetrical shape similar to a star shape. is there. On the other hand, since the slide plate 88 is constantly urged to the center position with respect to the annular external gear 78 by the leaf spring 90, when the drive of the gear train 34 by the motor is stopped, the slide plate 88 and the annular external gear 78 slide. The relative displacement with respect to the plate 88 is automatically eliminated, and the pair of slide plates 74 are separated from each other by the urging force of the spring 84 in the opening direction, and return to the open position.
Note that the toe adjustment procedure of the automobile using the open end wrench 70 is the same as that of the open end wrench 14 according to the reference example, and detailed description thereof is omitted.

According to the first embodiment of the present invention configured as described above, the following operational effects can be obtained. The open end wrench 70 is configured so that the tie rod hexagonal portion 12 (FIG. 6) abuts the end surfaces 76 of the pair of slide plates 74 facing each other, which are configured in a plane parallel to each other, on the tie rod 10. The tie rod hexagonal portion 12 can be securely clamped regardless of the size of the diameter. The pair of slide plates 74 are driven around the central axis 12 </ b> C of the tie rod hexagonal portion by the rotation driving means 18 with the tie rod hexagonal portion 12 being sandwiched by the end faces 76 of the slide plates that are contact portions. By doing so, the hexagonal portion of the tie rod is rotated.

  In addition, a pair of slide plates 74 and springs 86 constituting the clamping means 16 are supported by a rotating plate 88 so as to be rotatable relative to the annular external gear 78, and the pair of slide plates 74 are always opened by the springs 86. Urged in the direction. Further, the annular external gear 78 provided at a position surrounding the clamping means 16 has a C-shape with a part cut away, and the cut-out portion when the tie rod approaches the tie rod from the side. It is arranged in the open end part O. Therefore, the tie rod hexagonal portion 12 having the maximum allowable diameter can be drawn into the open end portion O in a state where the pair of slide plates 74 are most separated from each other.

  When the annular external gear 78 is rotationally driven by the gear train 34 of the rotational drive means 18, the rotational phase of the annular external gear 78 and the rotational plate 88 changes, and the cam plate projects from the pair of slide plates 74. The follower 84 that abuts the cam surface 82 of the 80 is guided by the cam surface 82 of the cam plate 80 that closes one end face of the annular external gear 78, and the rotation of the annular external gear 78 opens and closes the pair of slide plates 74. Convert to behavior. That is, the diameter of the tie rod 10 is increased or decreased by bringing the opposing end surfaces 76 of the slide plates 74 configured in parallel with each other into contact with the tie rod hexagonal portion 12 in conjunction with the rotation driving means 18. Regardless, the tie rod hexagonal portion 12 can be securely clamped.

  Further, when the opposing end surfaces 76 of each slide plate 74 abut on the tie rod hexagonal portion 12, the movement of the follower 84 protruding from the pair of slide plates 74 with respect to the cam surface 82 of the cam plate 80 is restricted, and the follower is driven. The child 84 is rotationally driven by the cam plate 80 without sliding with respect to the cam surface 82 of the cam plate 80, and the rotational operation of the annular external gear 78 is transmitted to the pair of slide plates 74. Therefore, the pair of slide plates 74 and the rotation plate 88 that supports the slide plates 74 rotate integrally with the annular external gear 78. In this way, the tie rod hexagonal portion 12 can be rotated by driving the pair of slide plates 74 around the central axis C12 of the tie rod hexagonal portion.

As described above, the open-end wrench 70 according to the first embodiment of the present invention has a pair of abutting surfaces facing each other when the opening / closing drive mechanism 72 of the clamping means 16 operates in conjunction with the rotational drive means 18. By appropriately changing the width of the two surfaces of the portion 76, the tie rod hexagonal portion 12 can be securely clamped regardless of the diameter of the tie rod 10, and the tie rod hexagonal portion 12 can be rotated.
In addition, detailed description of the same effects as the reference example and the second reference example of the present invention is omitted.

Next, a tie rod adjusting open end wrench 94 (hereinafter simply referred to as “open end wrench”) according to a second embodiment of the present invention will be described with reference to FIG. Here, the same or corresponding parts as those of the reference example of the present invention, the open-end wrench 14, 52, 70 according to the first and first embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. .

The open end wrench 94 according to the second embodiment of the present invention is similar to the open end wrench 70 according to the first embodiment in that the opening / closing drive mechanism 95 of the clamping means 16 is interlocked with the rotation drive means 18. It has a mechanism that operates.
Specifically, the opening / closing drive mechanism 95 of the clamping means 16 includes a pair of slide plates 96 that are separated from each other by a sliding operation, and is opposed to each other so as to directly contact the tie rod hexagonal portion 12 (FIG. 6). As a pair of abutting portions, end surfaces 98 of the pair of slide plates facing each other are configured to be parallel to each other. The pair of slide plates 96 are slidable in directions toward and away from each other when the guide grooves 102 are fitted into the guide pins 100. The guide pin 100 is rotatable around a central axis 12C of the tie rod hexagonal portion together with a slide plate driving gear 110 described later.

The rotation driving means 18 is for driving the pair of slide plates 96 around the central axis 12C of the tie rod hexagonal portion. More specifically, the rotation driving means 18 includes an annular sun gear 104 provided at a position surrounding the clamping means 16, a planetary gear 106 positioned radially outside the sun gear 104, and a further radius of the planetary gear 106. A planetary gear mechanism including an annular outer ring gear 108 located on the outer side in the direction is provided. The sun gear 104 and the outer ring gear 108 have a C-shape with a part cut away, and the cut-out portions 104a and 108a are open end portions O when the tie rods approach the tie rods from the side. Is arranged. A constant braking is applied to the carrier that supports each planetary gear 106. Normally, each planetary gear 106 does not revolve and rotates in the same place, and when a certain load or more is applied in the revolving direction, Each planetary gear 106 is configured to start revolution.
Further, teeth are formed on the inner peripheral surface 104b of the sun gear 104 and the outer peripheral surface 108b of the outer ring gear 108, and a gear train 34 that drives the teeth of the outer peripheral surface 108b of the outer ring gear 108 is provided. The gear train 34 is similar to the open end wrench 52, 70 according to the second reference example of the present invention and the first embodiment, and a gear 34F fixed to a drive shaft connected to the rotation shaft of the motor; A pair of gears 34G disposed between the gear 34F and the outer ring gear 108 is provided.

The clamping means 16 is pivotally supported as the opening / closing drive mechanism 95 on the base end side of the pair of slide plates 98 together with the pair of slide plates 98 so as to be rotatable around the central axis 12C of the tie rod hexagonal portion. The slide plate drive gear 110 meshes with the teeth formed on the inner peripheral surface 104b of the 104, and the link mechanism 112 that converts the rotation operation of the slide plate drive gear 110 into the slide operation of the pair of slide plates 96. The illustrated link mechanism 112 has a side surface of the slide plate drive gear 110 and a pair of slide plates 96 that are axially attached by a rod, and the slide plate drive gear 110 rotates in either the left or right direction from the illustrated rotation center position. Even so, the pair of slide plates 96 slide in a direction approaching each other. When the slide plate drive gear 110 rotates in the direction returning to the rotation center position, the pair of slide plates slide in a direction away from each other, and when the slide plate drive gear 110 is in the illustrated rotation center position, The slide plate 96 is in the most separated state. In the figure, a portion indicated by reference numeral 114 is a stopper with which the tie rod hexagonal portion 12 abuts.
Note that the toe adjustment procedure of the automobile using the open end wrench 94 is the same as that of the open end wrench 14 according to the reference example, and detailed description thereof is omitted.

According to the second embodiment of the present invention configured as described above, the following operational effects can be obtained. The open end wrench 94 has a C-shape in which both the annular sun gear 104 and the annular outer ring gear 108 provided at a position surrounding the clamping means 16 are cut out, and the notch 104a, 108a is arrange | positioned at the open end part O at the time of approaching a tie rod from the side of the tie rod 10. FIG. Therefore, the tie rod hexagonal portion 12 having the maximum allowable diameter can be drawn into the open end portion O in a state where the pair of slide plates 96 are most separated from each other.

Then, when the annular outer ring gear 108 is rotationally driven by the gear train 34 of the rotation driving means 18 in a state where the revolution of the planetary gear 106 is stopped and capable of rotating, the rotation of the annular outer ring gear 108 is rotated by the annular sun gear 104. , And the slide plate drive gear 110 that meshes with the teeth formed on the inner peripheral surface 104b of the sun gear rotates. Then, the rotation operation of the slide plate drive gear 110 is converted into the slide operation of the pair of slide plates 96 by the link mechanism 112. That is, in the open end wrench 94 according to the second embodiment of the present invention, the opposite end surfaces 98 of the slide plates 96 configured in parallel to each other are connected to the tie rods in conjunction with the rotation driving means 18. By abutting on the hexagonal portion 12, the tie rod hexagonal portion 12 can be securely clamped regardless of the diameter of the tie rod 10.

Further, the end surfaces 98 of the slide plates 96 facing each other come into contact with the tie rod hexagonal portion 12 and the pair of slide plates 96 are stopped, so that the rotation of the slide plate drive gear 110 is restricted, and the slide plate drive gear 110, The sun gear 104 and the planetary gear 106 are all locked and rotate integrally with the annular outer ring gear 108. At this time, the pair of slide plates 96 and the slide plate drive gear 110 also rotate around the central axis 12C of the tie rod hexagonal portion together with the annular outer ring gear 108, thereby rotating the tie rod hexagonal portion.
In addition, detailed description is omitted about the same effect as the reference example of this invention, the 2nd reference example , and 1st Embodiment .

  10: Tie rod, 12: Tie rod hexagonal part, 14, 52, 70, 94: Open end wrench for tie rod adjustment, 16: Clamping means, 18: Rotation drive means, 20: Abutting part, 22, 54, 72, 95: Open / close drive mechanism, 24: pair of arms, 26: linear actuator, 28: link mechanism, 34: gear train, 34A, 34B, 34C, 34D, 34E: gear, 36, 44: rotating shaft, 38: connecting rod, 40 , 42: Pivot, 46: Friction wheel, 56, 74, 96: A pair of slide plates, 56a: Arc-shaped protrusion, 58: Cam mechanism, 60, 86: Spring, 62, 78: Annular external gear, 64, 76, 98: end face, 66: lifting cam plate, 66a: inclined surface, 68: transverse cam plate, 68a: inclined surface, 68b: arcuate sliding contact surface, 80: cam Rate, 82: cam surface 84: follower, 88: rotating plate, 104: sun gear, 106: planetary gear, 108: outer ring gear 110: slide plate drive gear, O: open-end portion

Claims (3)

Tie rod adjustment open comprising: clamping means for clamping the tie rod hexagonal part approaching the tie rod from the side of the tie rod; and rotation driving means for rotating the clamping means while clamping the tie rod hexagonal part An end wrench,
The clamping means includes a pair of abutting portions opposed to each other for directly abutting the tie rod hexagonal portion, and an opening / closing drive mechanism for the pair of abutting portions to move apart and approach the tie rod hexagonal portion. It equipped with a door,
The open / close drive mechanism includes a pair of slide plates that move apart and approach each other by a slide operation as a mechanism that operates in conjunction with the rotation drive means, and the end surfaces of the pair of slide plates that face each other as the contact portion. An open-end wrench for adjusting a tie rod, characterized in that the rotation driving means is configured to rotate the pair of slide plates around a central axis of a tie rod hexagonal portion . The rotation driving means includes an annular external gear provided at a position surrounding the clamping means, a cam plate that closes one end face of the annular external gear, and an end face of an opening provided at a central portion of the cam plate And a follower that projects from the pair of slide plates and transmits the rotational movement of the annular external gear to the pair of slide plates by contacting the cam surfaces of the cam plates. The external gear has a C-shape with a part cut away, and the cut-out portion is arranged at an open end portion when approaching the tie rod from the side of the tie rod, and the rotation driving means is A gear train for rotating the annular external gear,
The sandwiching means, as the opening / closing drive mechanism, supports a spring that normally biases the pair of slide plates in the opening direction, and the pair of slide plates and the spring so as to be relatively rotatable inside the annular external gear. And the follower moves along the cam surface of the cam plate, so that the phase shift between the annular external gear and the rotation plate causes the pair of slide plates to open and close. The tie rod adjusting open end wrench according to claim 1 , wherein the tie rod adjusting open end wrench is converted. The rotation driving means includes an annular sun gear provided at a position surrounding the clamping means, a planetary gear positioned radially outward of the sun gear, and an annular outer ring positioned further radially outward of the planetary gear. The sun gear and the outer ring gear are formed in a C shape with a part cut away, and the cutout portion is disposed at the open end portion when approaching the tie rod from the side of the tie rod. In addition, teeth are formed on the inner peripheral surface of the sun gear and the outer peripheral surface of the outer ring gear, and a gear train that drives the teeth on the outer peripheral surface of the outer ring gear is provided,
The clamping means is supported as an opening / closing drive mechanism on the base end side of the pair of slide plates so as to be rotatable around a central axis of a tie rod hexagonal portion together with the pair of slide plates, and an inner peripheral surface of the sun gear a slide plate drive gear meshing with teeth formed on the tie rods adjustment according to claim 1, characterized in that it comprises a link mechanism for converting the rotational movement of the slide plate drive gear to sliding movement of the pair of slide plate Open end wrench.

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