JP2018127092A - Jack for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jack for an automobile capable of lifting up a vehicle body without a bearing, not only an automobile capable of traveling but also in an automobile immovable by failure, even in a low rider particularly low in a vehicle height.SOLUTION: A jack 10 for an automobile comprises an air cylinder 18 having two separated leg bars 14 inserted-extracted to a front side clearance 12a in front of a tire 13 and a rear side clearance 12b in the rear of the tire 13 among a tire house 12 of a low rider 11, a tire lift member 17 arranged in an inside space of the respective leg bars 14 and having two separated lift arms 16 allowed to abut on a front side lower part and a rear side lower part of the tire 13 and an air cylinder 18 for lifting the tire lift member 17. The two lift arms 16 become shorter than a rim diameter of the tire 13 in a separate distance of respective base end parts.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automobile jack for lifting a vehicle body of an automobile, particularly an automobile having a low vehicle height.

In the 1950s on the West Coast of the United States, East Los Angeles, the low-body “low rider”, which originates from a car customized by Mexican immigrants, is a popular car among some car enthusiasts. .
However, when the owner tries to maintain the vehicle under the floor, such as changing the oil at home, checking the undercarriage centered on the inside, and maintaining the exhaust system, the low rider has a clearance of several centimeters between the road surface and the vehicle body. Because it is low, the jack could not be inserted into the jack-up point of the body frame, and maintenance work could not be performed.
Therefore, conventionally, for example, a “car slope” described in Patent Document 1 is used, and a car tire is mounted on the car slope.

JP 2014-227731 A

  However, the “car slope” described in Patent Document 1 is an auxiliary tool for automobile maintenance on the premise that the automobile is in a state where it can travel. For this reason, if the car does not move due to a failure or puncture, the car slope cannot be loaded with tires, and maintenance of the vehicle body under the floor has not been possible.

Therefore, as a result of earnest research, the inventor assigned two lift arms to the front lower part and the rear lower part of the tire, instead of placing the jack at the jack-up point of the body frame and lifting the car body as in the past. In this state, it has been found that the above-mentioned problems can be solved if the lift mechanism is gradually raised by the jack mechanism to lift the vehicle body.
In addition, if the two lift arms are arranged in a divergent shape with the separation distance gradually increasing toward the tip, each lift arm can be tilted just by inserting it into the front lower gap and the rear lower gap. It has been found that each lift arm serves as a guide for centering, and the axis of the tire and the intermediate line between the lift arms are automatically aligned in plan view. Moreover, if the lift arms are arranged in such a manner that they are widened at the end in this way, even if the entire lower part of the tire tread is in close contact with the road surface during tire puncture, The present invention was completed by finding out that it was easy to insert into the gap.

The present invention has been made in view of this problem, and is not only a vehicle that can run, but also a vehicle that does not move due to breakdown or puncture, especially for a vehicle that can lift the vehicle body without any trouble even if it is a low rider with a low vehicle height. The purpose is to provide a jack.
Another object of the present invention is to provide an automobile jack that can lift up a tire in a stable state by two spaced apart lift arms and can easily set each lift arm to a punctured tire. It is what.

  The invention according to claim 1 is a jack main body having two spaced leg bars inserted into and removed from a front gap ahead of the tire and a rear gap behind the tire in a tire house of an automobile, A tire lift member disposed in an inner space of the two leg bars; a tire lift member that is long in a separating direction of the two leg bars; a base end portion fixed to the tire lift member; and a width direction of the tire lift member Two spaced apart lift arms protruding outward from one side surface and abutting against the front lower portion and the rear lower portion of the tire, and a jack mechanism for raising and lowering the tire lift member, the two The automobile jack according to claim 1, wherein a separation distance of a base end portion of the lift arm is shorter than a rim diameter of the tire.

  The invention according to claim 2 is the jack for an automobile according to claim 1, wherein the two lift arms are arranged in a divergent shape in which the separation distance gradually increases toward the tip. .

  Furthermore, the invention described in claim 3 is such that the two lift arms are such that the separation distance gradually increases toward the arm tip with reference to an imaginary line extending in the width direction of the tire lift member. The automobile jack according to claim 1, wherein the jack is inclined at an angle of 30 °.

  Furthermore, in the invention according to claim 4, the separation distance between the base ends of the two lift arms is 30 cm to 45 cm, and any one of claims 1 to 3 is characterized. It is a jack for automobiles as described in above.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the jack mechanism is an actuator including an air cylinder attached to the jack body. The automobile jack described.

The type of automobile to be lifted up is arbitrary as long as it has tires. For example, ordinary cars, small passenger cars, light four-wheeled passenger cars, small freight cars, light four-wheeled freight cars, four-wheeled freight cars, special-purpose cars, and the like can be employed.
As a material of each leg bar and jack body, for example, various steels including iron and stainless steel can be adopted.
Each leg bar is a linear member extending in the horizontal direction and spaced apart in parallel, and a round bar, a square bar or a thick plate can be adopted.
The length of each leg bar is arbitrary. For example, it is 10 cm to 40 cm. If it is less than 10 cm, the leg bar is too short and the stability of the jack body at the time of tire lift-up is lowered. Moreover, if it exceeds 40 cm, the leg bar will be too long and it will be difficult to handle the jack for automobiles. The preferred length of each leg bar is 20 cm to 35 cm.

As a material of each lift arm and tire lift member, for example, metals such as various steels including iron and stainless steel can be adopted.
As the tire lift member, for example, a round pipe, a square pipe, a round bar, a square bar, etc. can be adopted.
The two lift arms are members arranged in a letter C shape (a trumpet shape, a tip-open shape) in which the distance between the lift arms gradually increases toward the tip in plan view. Pipes, square pipes, planks, etc. can be used.
Even if each lift arm is fixed (planted) with its base end face attached to one side surface in the width direction of the tire lift member, the lower face of the base end portion of each lift arm is attached to the upper face of the tire lift member. You may fix in the state contact | abutted. Or you may fix in the state which contacted the upper surface of the base end part of each lift arm to the lower surface of a tire lift member. In any case, each lift arm protrudes outward from one side surface in the width direction of the tire lift member.
The length of each lift arm is arbitrary. For example, it is 10 cm to 40 cm. If it is less than 10 cm, the lift arm is too short and the stability of the tire at the time of tire lift-up is lowered. On the other hand, if it exceeds 40 cm, the lift arm is too long and it is difficult to handle the automobile jack. The preferred length of each lift arm is 20 cm to 35 cm.

The reason why the distance between the base ends of the two lift arms is made shorter than the tire rim diameter is that each lift arm is in contact with the lower part of the tread when the tire is lifted up. This is because the rim is supported from below and lifted up.
The separation distance between the base ends of the two lift arms is 30 cm to 45 cm. If it is less than 30 cm, the distance between the base ends of the two lift arms is too short to lift the tire in a stable state. If the distance exceeds 45 cm, when the distance between the base ends of the two lift arms is too long and the tire is small, each lift arm may support only the tread of the tire. In addition, the preferable separation distance of the base end part of two lift arms is 32 cm-40 cm.

  Although the inclination angle of each lift arm is not limited, with reference to virtual lines (virtual lines in which the lift arms are parallel to each other) extending in the width direction of the tire lift member (direction perpendicular to the length direction of the tire lift member), respectively It is 1 ° to 30 ° outward (outside) so that the separation distance gradually increases toward the tip. If it is less than 1 °, due to the camber angle of the tire, when the tire is lifted up, the position where the load of the automobile is applied tends to be the tip of each lift arm, and the automobile is difficult to lift vertically. Moreover, if it exceeds 30 °, the inclination angle of each lift arm is too large, the tire slips, the jack may come off, and the automobile may slide down. A preferable inclination angle of each lift arm is 1 ° to 10 °. Within this range, even if the tire has a camber angle, when the lift is lifted up, the position where the load of the automobile of each lift arm is applied is the base end, and there is no risk that the automobile will slide off from each lift arm. And can be lifted more safely.

The structure of the jack mechanism is arbitrary as long as the vehicle body can be lifted up. A manual type or an automatic type having an actuator may be used.
As the actuator, for example, an air cylinder, a hydraulic cylinder, an electric motor, or the like can be employed.
When maintaining the under floor of the vehicle body, two automobile jacks are used, and the left and right tires at the front of the vehicle are simultaneously lifted to maintain the under floor of the front of the vehicle body. Alternatively, the left and right tires at the rear of the car are lifted simultaneously to perform maintenance under the floor at the rear of the vehicle body. When lifting the entire vehicle, use a total of four automobile jacks. In this case, for example, after the front part of the vehicle body is lifted, the rear part of the vehicle body may be lifted or may be lifted in the opposite procedure.

According to the first aspect of the present invention, the two leg bars are inserted into the front gap and the rear gap of the tire house, and at the same time, the two lift arms are connected to the gap between the road surface and the front lower portion of the tire, Insert it into the gap between the road surface and the lower rear part. At this time, it is assumed that each lift arm is disposed immediately below the tire rim. Thereafter, the jack mechanism is operated to gradually raise the tire lift member. As a result, the two lift arms are brought into contact with the front lower part and the rear lower part of the tire, and then the lift arms continue to rise so that each lift arm supports the rim downward with the tread interposed therebetween. In this state, the vehicle body is lifted up.
Thereby, not only a car that can run, but also a car that does not move due to a failure or the like, particularly a low rider with a low vehicle height, can lift the vehicle body without any trouble.

In particular, according to the invention described in claim 2 and claim 3, the two lift arms have a divergent shape in which the separation distance gradually increases toward the tip in plan view (in the case of claim 3). Adopts two lift arms that are inclined by 1 ° to 30 ° in the direction in which their tips are separated from each other with reference to an imaginary line extending in the width direction of the tire lift member. By simply inserting each of the gaps between the front lower part and the rear lower part of the house, the inclined lift arms serve as guides for centering. Therefore, in a plan view, the tire axis and the intermediate line of the two lift arms are automatically aligned. As a result, when the tire is lifted up, the tire can be lifted up in a stable state.
In addition, since the two lift arms are arranged in such a manner as to spread out in this manner, even if the entire lower part of the tread is in close contact with the road surface during tire puncture, the two lift arms are separated from the gap at the front lower part of the tire house. Easy to insert into the gap at the bottom of the rear side. That is, the portion of each lift arm that is forcibly pushed under the tread that is in close contact with the road surface is likely to be only a part of each arm, for example, near each base end, and each lift arm can be lifted into a punctured tire with relatively little effort. The arm can be set.

  According to the invention described in claim 4, since the distance between the base ends of the two lift arms is 30 cm to 45 cm, the rim diameter of a general tire is 33 cm (13 inches) to 64 cm (25 inches). Therefore, although using the tread, the tire can be reliably lifted by each lift arm.

  According to the fifth aspect of the present invention, since an actuator such as an air cylinder is employed as the jack mechanism, the two lift arms can be raised by the actuator and the vehicle body can be lifted up automatically.

It is a perspective view of the jack for cars concerning Example 1 of the present invention. (A) Schematic showing a state in which two leg bars and two lift arms constituting a part of the automobile jack according to the first embodiment of the present invention are inserted into the front gap and the rear gap of the tire house. It is a side view of a structure. (B) It is a side view of schematic structure which shows the state which raised the vehicle body by raising the two lift arms which comprise a part of automobile jack which concerns on Example 1 of this invention. It is a top view which shows the state which inserted two leg bars and two lift arms which comprise a part of jack for motor vehicles concerning Example 1 of the present invention into the front side clearance gap and the rear side clearance gap of a tire house. . It is a top view which shows the state which inserted the two leg bars and two lift arms which comprise a part of jack for motor vehicles concerning Example 1 of the present invention into the tire house where the tire was punctured.

  Embodiments of the present invention will be specifically described below with reference to the drawings. Here, an example is given for lifting a vehicle body of a low rider, which is a low-height ordinary car. For convenience of explanation, the front end side of each leg bar is the front side of the automobile jack and the opposite side is the rear side of the automobile jack in a state where the automobile jack is viewed in plan. Further, the right side and the left side of the automobile jack are those when the jack is viewed from the front.

  1 and 2A, reference numeral 10 denotes an automobile jack according to the first embodiment of the present invention. The automobile jack 10 is a front part of a vehicle body 11a from a tire 13 in a tire house 12 of a low rider (automobile) 11. A jack body 15 having two leg bars 14 spaced in parallel and inserted into a rear gap 12b behind the vehicle body 11a from the tire 13 and an inner space of the two leg bars 14. A tire lift member 17 having two lift arms 16 that are in contact with the front lower portion and the rear lower portion of the tire 13, and an air cylinder (jack mechanism) 18 that raises and lowers the tire lift member 17. I have.

Hereinafter, these components will be specifically described.
As shown in FIGS. 1 and 2, the jack body 15 is composed of a pair of left and right long vertical frames 19, a short upper frame 20, and a short bottom made of a steel pipe having a rectangular cross section. This is a vertically long frame in which the frame 21 is connected in a rectangular frame shape.
A grip bar 23 extending in the length direction of the upper frame 20 is connected to the rear side surface of the upper end portion of each vertical frame 19 via a pair of left and right connecting bars 22 extending rearward. An air controller C that is in communication with a compressor (not shown) via an air hose H is attached to the rear side of one vertical frame 19 near the lower portion of the fixed portion of the connecting bar 22. The air controller C is provided with a lever S for switching between air supply and air release from an air compressor (not shown).
Further, an upper slide hole 19a and a lower slide hole 19b extending in the vertical direction are formed in the upper half and the lower half of the inner side surface (faces facing each other) of each vertical frame 19.
Furthermore, a thick connecting bracket 24 having a pin hole 24a formed at the center is fixed to the upper side surface of the intermediate portion in the length direction of the lower frame 21 of the jack body 15. Further, both end portions in the length direction of the lower frame 21 are extended outward from the left and right vertical frames 19. The base end portions of the corresponding leg bars 14 are connected to the distal end surfaces of these extensions.

  Each leg bar 14 is a steel pipe having a square cross section with a length of 50 cm (the protruding length from the lower frame 21 of the jack body 15 is about 40 cm), and the interval between the leg bars 14 is 48 cm. The lower surface and the distal end surface of the distal end portion of each leg bar 14 are open. A pair of small-diameter running rollers are provided in the pipes at the distal ends of the leg bars 14 through a short rotating shaft 25 extending in the width direction of the leg bars 14 with the outer peripheral portions exposed from the openings. 26 is pivotally supported. Further, the base end portion of each leg bar 14 protrudes slightly rearward from the lower frame 21. A pair of large-diameter traveling rollers 28 are pivotally supported in the vicinity of the inner side surfaces (surfaces facing each other) of these protruding portions via a rotation shaft 27 extending in the width direction of the leg bar 14. The jack body 15 is provided so as to be movable via a total of four large and small traveling rollers 26 and 28.

A large-diameter air cylinder 18 having a length approximately half the height of the jack body 15 is accommodated in the inner space of the jack body 15 with the rod 18a facing downward. The tip of the rod 18 a is pivotally supported by the connection bracket 24 via a connection pin 29. A pair of thick end plates 30 and 31 that are rectangular in plan view are disposed on the upper end surface and the lower end surface of the air cylinder 18. Among these, on the upper surface of the upper end plate 30, the left and right air cylinders 18 including the end plates 30 and 31 have L-shaped cross sections so that the air cylinders 18 can smoothly move up and down along the inner surface of each vertical frame 19. A pair of guide brackets 32 is provided.
A total of four slide pins which are inserted into the upper slide hole 19a or the lower slide hole 19b facing each other and extend in the thickness direction of the vertical frame 19 are provided on the left side surface and the right side surface of each end plate 30, 31. It is fixed in the holding state. A total of four guide rollers 34 that are housed in the pipes of the vertical frames 19 and roll along the front and rear inner surfaces of the vertical frames 19 are pivotally supported at the distal ends of the slide pins.

Furthermore, the front end portion of the upper end plate 30 and the front end portion of the lower end plate 31 have approximately half the length (height) of the jack body 15 and are parallel to the vertical frames 19. A vertically long elevating frame 35 arranged in front of each vertical frame 19 is fixed. The elevating frame 35 connects a pair of left and right long vertical frames 36, a short upper frame 37, and a lower frame 38 that are spaced in parallel to each other in a rectangular frame shape, and the lower ends of the vertical frames 19 are reinforced. This is a vertically long frame connected by a frame 39. Each of these frame members is made of a steel pipe having a rectangular cross section. The upper side surface of the front end portion of the upper end plate 30 is fixed to the lower side surface of the upper frame 37, and the lower side surface of the front end portion of the lower end plate 31 is fixed to the upper side surface of the reinforcing frame 39.
The lower frame 38 includes the tire lift member 17 disposed in the inner space of the two leg bars 14 by having portions in which both end portions in the length direction protrude outward from the left and right vertical frames 36. ing.

The tire lift member 17 is a thick square steel pipe having a length of 40 cm, and the pair of lift arms 16 having a divergent shape in which the separation distance gradually increases toward the tip on the lower surfaces of both ends in the length direction. The upper surface of the base end of the is fixed. Thereby, each lift arm 19 will be in the state protruded outward from one side surface of the width direction of the tire lift member 17.
Each lift arm 16 has a length of 35 cm and is made of a steel pipe having a square cross section thinner than each leg bar 14.
The distance between the base ends of the lift arms 16 is 30 cm shorter than the rim diameter (16 inches (about 40 cm)) of the tire 13.
The inclination angle between the right lift arm 16 and the left lift arm 16 is based on a virtual line (a line parallel to the intermediate line b of the two lift arms 16) v extending in the width direction of the tire lift member 17. As shown in FIG. 3, the distance is gradually increased outward (outside) so as to gradually increase toward the arm tip.

Next, a method for lifting the vehicle body 11a of the low rider 11 by the automobile jack 10 according to the first embodiment of the present invention will be described with reference to FIGS. Here, a method for lifting the front portion of the vehicle body 11a of the low rider 11 using two automobile jacks 10 will be described.
As shown in FIGS. 1 and 2, first, the tip of an air hose H extending from a compressor (not shown) is communicated with an air controller C of one automobile jack 10. Thereafter, the grasping rod 23 is grasped with both hands and pushed. In this way, one automobile jack 10 is moved by the four traveling rollers 26 and 28, and the two leg bars 14 are respectively provided in the front gap 12a and the rear gap 12b in the tire house 12 on the right side of the low rider 11. Insert from the width direction. At this time, the two lift arms 16 are inserted into the gap between the road surface and the front lower portion of the tire 13 and the gap between the road surface and the rear lower portion from the same direction. Each lift arm 16 is disposed directly below the rim 40 of the right front tire 13 (see FIG. 2A).

Similarly, when the other automobile jack 10 is pushed by hand, the other automobile jack 10 travels via the four traveling rollers 26, 28, and the front clearance in the tire house 12 on the left front of the low rider 11. The two leg bars 14 are respectively inserted from the vehicle width direction into 12a and the rear gap 12b. At this time, the two lift arms 16 are inserted from the same direction into the gap between the road surface and the front lower part of the tire 13 and the gap between the road surface and the rear lower part, and each lift arm 16 is inserted into the left front tire 13. The rim 40 is disposed immediately below the rim 40.
Thereafter, the air controller C of one automobile jack 10 and the air controller C of the other automobile jack 10 are communicated with each other via a communication hose (not shown) so as to operate synchronously.

Thereafter, the air cylinder 18 is operated to gradually raise the tire lift member 17. Specifically, by inserting the lever S of one air controller C into the rod protruding side, the downward-facing rod 18a whose tip is pivotally supported by the connecting bracket 24 is gradually protruded. Thereby, while each guide roller 34 rolls along the front and rear inner surfaces of each vertical frame 19, the air cylinder 18 gradually rises, and the two lifted frames 35 and the tire lift member 17 are connected to each other. The lift arm 16 is gradually raised.
As a result, the two lift arms 16 are brought into contact with the front lower portion and the rear lower portion of the tread 13a of the tire 13, and thereafter, the lift arms 16 are continuously raised so that the lift arms 16 are treaded. With the rim 40 supported from below via 13a, the right side of the vehicle body 11a is gradually lifted up.

Also, the compressed air from the compressor is simultaneously supplied to the other air controller C via the communication hose also to the other automobile jack 10. As a result, the other air cylinder 18 is operated, the two lift arms 16 are gradually raised together with the tire lift member 17, and the left side of the vehicle body 11a is supported by the rim 40 from below via the tread 13a. The lift is gradually lifted in synchronization with the right side of the vehicle body 11a.
As a result, not only a normal car but also a car that does not move due to failure or puncture, especially a low rider 11 with a low vehicle height (including a vehicle height of zero), there is no need to find the jack-up point of the vehicle body 11a. In addition, the vehicle body 11a can be lifted up to, for example, a height of about 35 cm without hindrance (see FIG. 2B).

In addition, here, as the two lift arms 16, those having a divergent shape in which the separation distance gradually increases toward the tip in plan view (see FIG. 3, the hatched area indicates the grounding of the tread 13 a). region). Therefore, just by inserting the two lift arms 16 into the front gap 12a and the rear gap 12b of the tire house 12, the inclined lift arms 16 serve as guides for centering, and the axis of the tire 13 in plan view. a and the intermediate line b of the two lift arms 16 are automatically aligned. As a result, when the tire 13 is lifted up, the tire 13 can be lifted up in a stable state.
Furthermore, since the two lift arms 16 are arranged in such a manner as to spread out in this way, even if the entire lower portion of the tread 13a is in close contact with the road surface when the tire 13 is punctured, the two lift arms 16 are attached to the tire. It is easy to insert into the front side gap 12a and the rear side gap 12b of the house 12 (see FIG. 4, the hatched area is a grounding area of the tread 13a enlarged by puncture). That is, among the lift arms 16, it is likely that the lift arms 16 are forcibly pushed under the treads 13 a that are in close contact with the road surface only near the base end portions, and the lift arms under the punctured tires 13 with relatively little effort. 16 can be set.

In addition, since the distance between the base ends of the two lift arms 16 is 30 cm, the rim diameter of the tire 13 is 40 cm, so that the tires 13 are reliably lifted by the lift arms 16 through the tread 13a. can do.
Furthermore, since the air cylinder 18 is employed as the jack mechanism, the vehicle body 11a can be automatically lifted by the two lift arms 16.
Moreover, since each traveling roller 26 and 28 was provided so that each traveling roller 26 and 28 could roll via the rotating shafts 25 and 27 extended in the width direction of the leg bar 14, also about the low rider 11 of the state parked in parallel. Maintenance work can be performed.

  The automobile jack of the present invention is useful as a technique for lifting a vehicle body of an automobile, particularly an automobile having a low vehicle height.

10 Automotive Jack 11 Lowrider (Automobile)
12 tire house 12a front gap 12b rear gap 13 tire 14 leg bar 15 jack body 16 lift arm 17 tire lift member 18 air cylinder (jack mechanism)
v Virtual line

Claims (5)

A jack body having two spaced leg bars that are inserted into and removed from a front gap in front of the tire and a rear gap in the rear of the tire in an automobile tire house;
A tire lift member disposed in the inner space of the two leg bars and long in the direction of separation of the two leg bars;
A base end portion is fixed to the tire lift member and protrudes outward from one side surface in the width direction of the tire lift member so as to be in contact with the front lower portion and the rear lower portion of the tire. A lift arm,
A jack mechanism for raising and lowering the tire lift member,
A jack for an automobile, wherein a separation distance between base ends of the two lift arms is shorter than a rim diameter of the tire.   2. The automobile jack according to claim 1, wherein the two lift arms are arranged in a diverging shape in which a separation distance gradually increases toward a tip.   The two lift arms are inclined at an angle of 1 ° to 30 ° so that the distance between the two lift arms gradually increases toward the tip of each arm with reference to an imaginary line extending in the width direction of the tire lift member. The automobile jack according to claim 1 or 2.   4. The automobile jack according to claim 1, wherein a separation distance between base ends of the two lift arms is 30 cm to 45 cm. 5.   The jack for an automobile according to any one of claims 1 to 4, wherein the jack mechanism is an actuator including an air cylinder attached to the jack body.