KR100434164B1 - Swing Arm of Lift for Maintenance of Automobile - Google Patents

Abstract

The present invention enables one-touch height adjustment of the vehicle pedestal.

The vehicle pedestal 2 is installed at the distal end of the swing arm 1 via an X-shaped parallel link mechanism 8. In addition, in the X-type parallel link mechanism 8, the camshaft 12 is provided between one link plate 9 and 9, the involute cam 13 is provided in the center part of the camshaft 12, and the one protrusion part is provided. The knob 14 is provided, and the swing arm 1 is provided with an inclined surface 18 capable of pressing against the cam surface of the involute cam 13.

Description

Swing Arm of Lift for Vehicle Maintenance {Swing Arm of Lift for Maintenance of Automobile}

The present invention relates to a swinging arm that is capable of lifting and lowering horizontally at any height and having a vehicle pedestal for supporting the vehicle at the tip.

The vehicle pedestal provided at the tip of the swing arm needs height adjustment according to the type of vehicle to be lifted up.

So conventionally, for example, as shown in Fig. 7, the support shaft 24 having a male screw projecting from the lower surface of the vehicle pedestal 2 to the female screw hole 23 provided at the tip of the swing arm 1 is turned. The height of the vehicle stand 2 was adjusted by the screw feed operation.

As for the swing arm which made the height of the vehicle stand adjustable by the screw feed operation, the adjustment allowance of the vehicle stand is determined by the length of a support shaft.

The adjustment clearance is preferably larger so that the height of the lifting point can correspond to various vehicles having different heights. However, when the support shaft becomes long, the support shaft protrudes much below the swing arm when the vehicle support is lowered to support the swing arm. The lower end of the shaft cannot be lowered than immediately before contacting the floor, and it is difficult to secure stability when the vehicle stand is made high.

In addition, because the screw feed type, the operation takes a long time because the number of turns to the adjustment height is many times and difficult to turn.

In addition, although the support shaft has a double telescope structure inside and outside, the support shaft is designed to be reduced when the vehicle stand is lowered. However, the operability is poor, and the height is adjusted by removing the screw and interposing the spacer, or the height is different. Although it is also possible to prepare a plurality of support shafts and replace them as necessary, either of them increases the number of parts, which is a management problem.

The present invention is a swing arm of a vehicle maintenance lift that has a large height adjustment margin of the vehicle pedestal and can be lowered until it comes in contact with the floor, and is excellent in both stability and workability. And a cam mechanism for supporting the vehicle pedestal at an arbitrary position by preventing the contracting motion of the X-type parallel link mechanism, and connecting the swing arm and the pedestal to the X-type parallel link mechanism. A ratchet mechanism for preventing the contracting motion of the X-type parallel link mechanism and supporting the vehicle pedestal at an arbitrary position is provided.

In the former swing arm, the cam mechanism is provided with a rotary cam on one link plate whose lower end in the X-type parallel link mechanism is rotatably attached to the swing arm, and the cam surface of the rotary cam with respect to the swing arm. It is preferable that it can be assembled so that a pressurization operation is possible, and at least any one of the contact surfaces of a cam surface and the cam in a swing arm was slip-resistant.

In the latter swing arm, the ratchet mechanism includes a ratchet claw provided at the lower end of the other link plate that moves along the swing arm in the X-type parallel link mechanism, and the lower end of the other link along the swing arm. It can be comprised by the ratchet tooth arrange | positioned in parallel with the guide to guide.

Also, in either swing arm, it is preferable to give the X-type parallel link a spring force for preventing the X-type parallel link from contracting due to the weight of the vehicle pedestal.

1 is a perspective view showing a swing arm of a first embodiment according to the present invention;

2 is an explanatory diagram showing a swing arm of a first embodiment according to the present invention;

3 is an explanatory diagram of the swing arm in the first embodiment according to the present invention;

4 is a perspective view showing a swing arm of a second embodiment according to the present invention;

5 is an explanatory diagram showing a swing arm of a second embodiment according to the present invention;

6 is an operation explanatory diagram of a swing arm in a second embodiment according to the present invention.

7 is an explanatory diagram of a conventional example.

<Description of the symbols for the main parts of the drawings>

1: swing arm 1a: pedestal mounting portion

2: vehicle stand 3: base

4: seat 5: rubber pad

6, 7: guide groove 8: X-type parallel link mechanism

9, 10: link plate 11, 15: torsion spring

12: Camshaft 13: Involute Cam

14 knob 16 recessed portion

17: protrusion 18: slope

19: axis of rotation 20: ratchet claw

21 knob 22 ratchet tooth

23: female thread hole 24: support shaft with male thread

The swing arm of the vehicle maintenance lift which concerns on this invention is demonstrated based on drawing.

1 and 2 show the tip portion of the swing arm of the first embodiment, wherein the tip of the swing arm 1 is roughly half the thickness of the swing arm 1 compared to the other portions of the swing arm, and the width is the front half. A narrow pedestal mounting portion 1a is formed, and the vehicle pedestal 2 is assembled to the pedestal mounting portion 1a.

The vehicle pedestal 2 has a seat plate on a thick plate-shaped base 3 having a width narrow portion formed at a proximal end so as to be symmetrical with the pedestal mounting portion 1a. The rubber pad 5 is attached with 4) in between, and the guide groove 6 as a guide is formed in the both sides of the part which is not narrow.

On the other hand, guide grooves 7 as guides are formed on both sides of the narrow portion of the pedestal mounting portion 1a.

8 and 8 are X-shaped parallel link mechanisms 8 and 8 configured by cross-linking a pair of link plates 9 and 10 at the center of each other and rotatably attaching the centers of the crossed portions, together with both sides. One link plate 9 is rotatably attached to the side of the pedestal mounting portion 1a and the upper end of the link plate 9 with respect to the guide groove 6 formed on the side of the base 3 along the guide groove 6. Sliders are connected to each other so as to slide freely, and the other link plate 10 is rotatably attached to the side of the base so that the other side of the link plate 9 is symmetrical with the link plate 9 and the lower side of the pedestal mounting portion 1a The slider is connected to the guide groove 7 formed in the slide so as to slide freely along the guide groove 7.

And the torsion spring 11 which gives a spring force to the extension side of the cross part of the link plates 9 and 10 is assembled in the X-type parallel link mechanism 8. As shown in FIG.

Moreover, between the link plates 9 and 9 arrange | positioned at both sides, the camshaft 12 is provided in the state below the center, and the one end part protruded to the side, and the camshaft 12 has the rotation cam in the center part. A cam 13 using an involute curve (hereinafter referred to as an involute cam) 13 is rotatably provided integrally with the cam shaft 12, and the cam 14 and the cam shaft 12 are cams at the tip of the protrusion. The torsion spring 15 is provided to give a force to rotate the large diameter toward. On the cam surface of the involute cam 13, a fine uneven surface is formed as an anti-slip treatment.

Moreover, the recessed part 16 and the protrusion 17 are continuously provided in the upper surface of the pedestal mounting part 1a, and the said part from the bottom of the recessed part 16 to the top of the protrusion 17 is mentioned above. An inclined surface 18 in contact with the involute cam 13 is formed.

Next, in the swing arm formed as described above, an example of adjusting the height of the vehicle pedestal will be described. In order to raise the height of the vehicle pedestal 2, when the base 3 is lifted up, (a) and (b) of FIG. As shown in (c), the X-type parallel link mechanism 8 follows the movement of the base 3 while the ends of each link plate 9, 10 move along the guide grooves 6, 7, respectively. Therefore, when the involute cam 13 is to be lowered from the inclined surface 18 by the motion of the X-type parallel link mechanism 8, the involute cam 13 and the cam surface are inclined by the force of the torsion spring 15. 18) Rotate to contact.

Therefore, no matter what height is released, the involute cam 13 is maintained in a state where the cam surface is pressed against the inclined surface 18. On the contrary, when lowering the vehicle stand 2, by turning the knob 14, the cam surface of the involute cam 13 is separated from the inclined surface 18, and when the base 3 is pushed down in that state, the operation in the reverse direction is performed. When the vehicle pedestal can be lowered and the hand 14 is released from the knob 14, the cam surface of the involute cam 13 is brought into contact with the inclined surface 18 to be caught.

The swing arm formed in this way can be adjusted in one touch only by lifting the vehicle stand or pushing the knob to push it down, and the unique structure of the X-type parallel link mechanism allows the vehicle stand to have high height adjustment and high stability. .

In addition, even if the vehicle is lowered, since there is no protrusion at the bottom, the swing arm can be lowered to the lowest position, so that it can cope with most models.

In addition, in 1st invention, the anti-slip process performed on the cam surface can also be changed to a toothed or knurled process, or can be provided in the inclined surface 18. FIG. In one embodiment, since the involute cam is provided on the link plate and the cam surface is pressed against the inclined surface provided in the vehicle pedestal mounting portion, the assembly is facilitated by a rational combination, but the cam and the inclined surface are reversed, for example. For example, the center of the pedestal mounting portion is cut out and the involute cam is arranged thereon, while the inclined surface is provided on the hydraulic member installed between the left and right X-type parallel link mechanisms, or the vehicle pedestal and the link plate and It does not interfere even if it is arrange | positioned mutually or the link plate which comprises one X-type parallel link mechanism, and rotation cams use various rotary cams, such as a cam using a trochoid curve other than an involute cam, for example. It is also possible to employ.

In addition, although the recessed part 16 and the protrusion 17 were continuously provided in the pedestal mounting part 1a in the Example, the pedestal mounting part 1a is not provided without providing the recessed part 16 and the protrusion 17. As shown in FIG. The cam surface may be directly supported on the upper surface of the.

Although the first embodiment has a hooking function using a cam, it is possible to obtain the same effect even with a ratchet mechanism, so that the second embodiment using the ratchet mechanism will be described next.

4 and 5 showing the second embodiment also show the tip portion of the swing arm as in the first embodiment, and the same reference numerals as those in the first embodiment are used for the same functional parts as the first embodiment. The same sign as was used.

The swing arm 1 is a telescope-type telescopic type in which the front part is freely drawn out of the main body. The front end part is provided with a vehicle pedestal attaching part 1a having a front light emitting part at the tip end thereof. The vehicle stand 2 is assembled to the mounting portion 1a with the X-type parallel link mechanism 8 interposed therebetween.

Since the vehicle pedestal 2 and the X-type parallel link mechanism 8 have already been described in Embodiment 1, detailed description thereof will be omitted.

In the X-type parallel link mechanism 8, a state in which the rotary shaft 19 protrudes the end portions on both sides between the lower ends of the other link plates 10 and 10 whose lower ends move along the swing arm 1. The ratchet claw 20 is provided at one protruding end of the rotary shaft 19, and the knob 21 is provided at the other protruding end thereof.

On the other hand, on one side of the pedestal mounting portion 1a, a ratchet tooth which prevents the X-type parallel link mechanism 8 from being widened by engaging with the ratchet claw 20 in parallel with the guide groove 7 ( 22 is provided integrally, and a spring force is applied to the rotary shaft 19 in a direction in which the ratchet claws 20 are intended to engage the ratchet teeth 22.

In the swing arm comprised in this way, the height adjustment example of the vehicle stand is demonstrated. In order to raise the height of the vehicle stand 2, when the base 3 is lifted up, the other in the X-type parallel link mechanism 8 is carried out. The link plate 10 of the ratchet claw 20 moves the ratchet claws 20 in a direction in which the ratchet teeth 22 ride one tooth over each other so that the vehicle pedestal 2 can be raised in the order of (a), (b), and (c). If it becomes the desired height, it will be overwhelmed by releasing from the base 3.

On the contrary, when lowering the vehicle stand 2, as illustrated in FIG. 6B, when the knob 21 is rotated to release the ratchet mechanism, the base 3 can be pushed down. Wages can be lowered in the reverse order, and the ratchet claws 20 mesh with the ratchet teeth 22 when the knob 21 is released.

The swing arm formed as described above can be height-adjusted by one-touch operation of lifting a vehicle stand or operating a knob to push down, whereby the same effect as in the first embodiment is achieved.

The ratchet mechanism of this embodiment consists of a ratchet claw 20 provided at the bottom of the link plate 10 and a ratchet tooth 22 arranged in parallel with the guide groove 7 in the pedestal mounting portion 1a, but the link plate Ratchet teeth provided with the shaft on the main shaft to which the main shaft is rotatably attached, and ratchet teeth provided on the shortest part of the link plate, and ratchet claws provided on the side of the base or pedestal mounting part to which the link plate is rotatably attached. It may be.

In this embodiment, the ratchet teeth (including the ratchet claws) are provided only on one side of the pedestal mounting portion, but they can be provided on both sides to increase the reliability, and either embodiment employs a handle or lever instead of the knob. You may.

The swing arm of the present invention aims to enable one-touch adjustment of the vehicle pedestal by effective use of the cam mechanism or the ratchet mechanism, while making the most of the advantages of the X-type parallel link mechanism, and to change the shape of the pedestal mounting portion, And the X-type parallel link mechanism can be rotatably assembled so as to be reversed with the attachment side and the slider connection side.

Advantageous Effects of Invention According to the present invention, it is strong and stable, and the lowering height of the lift arm is not limited, and above all, the operability is excellent and the height can be adjusted quickly.

And a ratchet claw provided at the lower end portion of the other link plate which moves along the swing arm in the X-type parallel link mechanism or a structure in which the cam surface of the rotary cam provided on one link plate is operatively pressed against the swing arm. Since the lower end of the other link is assembled so as to be engaged with the ratchet teeth arranged in parallel with the guide guided along the swing arm, the assembly can be facilitated by rational arrangement, and the cam face and the cam face are in contact with each other. If anti-slip treatment is applied to any one of them, high frictional force can be ensured, and reliability at the time of improvement is improved.

In addition, by providing a spring force that prevents the X-type parallel link mechanism from contracting due to the weight of the vehicle stand, the X-type parallel link mechanism reduces the force for pushing up the vehicle stand during the height adjustment work. can do.

Claims (12)

A swing arm having a vehicle support for supporting a vehicle at the tip, capable of lifting and moving horizontally at any height, A cam mechanism for connecting the swing arm and the vehicle stand with an X-type parallel link mechanism, for preventing the contracting motion of the X-type parallel link mechanism and supporting the vehicle stand in an arbitrary position, wherein the cam mechanism has an X-type parallel The lower end of the link mechanism is mounted on a swing arm, and a rotary cam is provided on one link plate, and the cam surface of the rotary cam is assembled to enable a pressing operation against the swing arm. Swing arm. delete delete delete delete delete The method of claim 1, At least one of the contact surfaces between the cam surface and the cam on the swing arm is provided with an anti-slip treatment for swing arm of a vehicle maintenance lift. delete delete A swing arm having a vehicle support for supporting a vehicle at the tip, which allows for lifting movement and horizontal rotation at any height, A ratchet mechanism for connecting the swing arm and the vehicle stand with the X-type parallel link mechanism and preventing the contracting motion of the X-type parallel link mechanism to support the vehicle stand in an arbitrary position, wherein the ratchet mechanism is the X-type parallel link mechanism. Ratchet claws provided at the lower end of the other link plate moving along the swing arm in the link mechanism, and ratchet teeth arranged in parallel with the guide guiding the lower end of the other link along the swing arm. Swing arm of the vehicle maintenance lift. delete The method according to claim 1 or 10, A swing arm of a vehicle maintenance lift, wherein the X-type parallel link mechanism is provided with a spring force that prevents the X-type parallel link mechanism from contracting by the weight of the vehicle stand.