JPH0680790U - Car maintenance lift - Google Patents

Abstract

(57) [Summary] [Structure] The link mechanism 6 includes a short arm 6a integrally fixed to a connecting shaft 3a pivotally attached to one end of a base 1a installed on the bottom surface in the pits 1 and 1, and a short arm 6a thereof. The short arm 6a is pivotally attached, the tip is pivotally attached to one end of the table 9, and the roller 8 is pivotally attached to the base end thereof so that the base end is slidable along the corrugated rail 5 of the base 1a. Long arm 6b supporting the shaft and table 9 supporting the car
And a push rod 10 connected from one end of the table 9 to the tip portion of the short arm 6a. [Effect] The number of parts of the link mechanism that require precision, such as the number of parts required to be accurate, can be provided at a low cost for a vehicle maintenance lift, and the number of nodes supported by the pins of the conventional X-type link mechanism is small. The rattling that occurs due to use can be ignored for the entire vehicle maintenance lift, and a work space is created under the table when lifting and lowering, which improves work efficiency.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile maintenance lift using a doll (hitogata) link mechanism.

[0002]

[Prior art]

 Among the lifting devices, the vehicle maintenance lift comprises a table that supports the underside of the vehicle, an X-type link mechanism that moves the table up and down, and a base to which one end of the X-type link mechanism is attached. The height at which the X-type link mechanism lifts the table requires about 1800 mm for the worker to maintain the underside of the vehicle while standing, and the size of the table supports the underside of the mini vehicle except for the wheels. Therefore, the length must be about 1500 mm at the longest, so it is not possible to use a long arm, and as shown in Fig. 6, two or more X-type link mechanisms with short arms were vertically stacked.

[0003]

[Problems to be solved by the device]

 However, the X-type link mechanism tends to be expensive because the number of parts is larger than that of the one-stage X-type link mechanism in addition to the accuracy of the arm parts and the like that form the link mechanism being required. In addition, since there are many nodes supported by the pins of the X-type link mechanism, the amount of backlash generated by long-term use will be too large to ignore for the entire vehicle maintenance lift.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention is a lift for automobile servicing, which inherits the basic idea of the past and has a higher degree of perfection, and its structure is, as a first means, a table for supporting the automobile and a base end on one end of the base. A short arm that is pivotally attached, and a long arm that is pivotally attached to the cross arm inside the tip end of the short arm so that the tip is pivotally attached to one end of the table and the base end is slidable along the base. A link mechanism constituted by a push rod in which both ends of the short arm and a portion of the table at least from the intersection of the both arms to one end are pivotally connected to each other. In the automobile maintenance lift described above, a correction curve corresponding to the tilt angle of the table tilted by the lifting operation is added to the sliding surface with the base end of the long arm. Further, it is desirable that the push rod of the automobile maintenance lift be adjustable in length by a turnbuckle mechanism. Next, the base is installed on the inner bottom surface of the pit, one side is pivotally attached to the opening of the pit, and the other side is linked to the raising and lowering operation of the long arm, and an openable / closable pit cover is provided. It is desirable to be able to close the pit opening during storage and ascent / descent.

[0005]

[Action]

 By the first means, the long arm can be corrected and moved in the ascending / descending direction so that the table always moves parallel to the base as it ascends / descends by the sliding surface provided with the correction curve. The tilt of the table can be changed by expanding and contracting the push rod as the second means by the turnbuckle mechanism to adjust the length. Next, in the third means, one side is pivotally attached to the opening of the pit so that the lift can lift and lower the lift without lifting the pit cover when the lift moves up and down. When it moves, it covers the opening of the pit.

[0006]

【Example】

 Hereinafter, a vehicle maintenance lift according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a lift, in which 1,1 are rectangular pits formed by excavating below the floor surface, and the pits 1, 1 are provided in parallel with each other at intervals equal to the width of the vehicle. The one end sides of the pits 1 and 1 are communicated with each other by a communication passage 2 which is orthogonal to the longitudinal direction of the pits, whereby the pits 1 and 1 and the communication passage 2 are U-shaped in a plane. A connecting shaft 3a is rotatably attached to the base 1a by supporting the bearing units 4 and 4 at both ends while passing through the communication passage 2 and straddling both pits 1 and 1 on the one end side. ing. On both left and right sides of the pit, corrugated rails 5 and 5 are provided from the other end of the pit to the middle.

FIG. 2 is a front view of the lift and shows a state in which the lift is extended. Reference numeral 6 denotes a central portion of the long arm 6b and a distal end portion of the short arm 6a which are pivotally connected to each other by a central shaft 3b. It is a doll link mechanism. The link mechanism 6 includes a short arm 6a integrally fixed to a connecting shaft 3a pivotally attached to one end of a base 1a installed at the bottom surface of the pits 1 and 1, and a portion inside the tip of the short arm 6a. Is pivoted on the central shaft 3a in a crossed manner, the tip is pivotally attached to one end of the table 9, the roller 8 is pivotally attached to the base end, and the base end is attached to the corrugated rail 5 of the base 1a. A long arm 6b slidably supported, a table 9 supporting the lower surface of the automobile except the wheels, a tip of the short arm 6a, and a long arm from the intersection of at least the two arms 6a and 6b of the table 9. 6b is a push rod 10 having both ends connected to each other in a pivoted state between a part from one end on the side where the 6b is pivoted. An elevating cylinder 12 connected to a pressurizing device 11 installed in the communication passage 2 is attached to the base end of the long arm 6b, and a piston 13 is pivotally supported by a mounting shaft 3c at the tip end of the short arm 6a. .

The rail 5 is a guide member having a sliding surface at the base end portion of the long arm 6b that is slidable, and is parallel to the base 1a even when the doll link mechanism 6 is moving up the table 9. This is for correcting the base end height of the long arm 6b in the ascending / descending direction so that the table is held. Corresponding to the tilt angle, calculation or locus is measured in the field and set respectively. In addition, a wheel pressing member 5a is attached above the rail 5 so that the lift after ascent does not roll over from the rail 5 side of the pit 1 to the connecting shaft 3a side. It may be a hole. The push rod 10 can be adjusted in length by a turnbuckle mechanism having right and left screws 10a and 10b attached to both ends as shown in FIG. 3, and the table 9 can be finely adjusted after the installation work of the lift. Is set so as to rise while keeping parallel to the base 1a.

In order to raise the lift configured as described above, when hydraulic oil is supplied to the lifting cylinder 12 as shown in FIG. 4 showing the contracted state, the piston 13 extends and the tip of the short arm 6a. , The short arm 6a stands up while rotating around the connecting shaft 3a, and at the same time, the long arm 6b stands up and the reduced doll link 6 stands up. At this time, the roller 8 moves in the pit 1 along the rail 5 and adjusts the base end height of the long arm 6b, so that the table 9 always rises in a plane with respect to the base 1a.

A rack 20 is attached to the side of the elevating cylinder 12 so as to face upward, and a locking claw 21 that meshes with the rack 20 is locked to a connecting shaft, which serves as a fall prevention device when the table is raised. As a result, it is safe even if the hydraulic pressure of the lifting cylinder 12 drops.

Reference numeral 30 denotes a pit cover that covers the open portion or the peripheral portions of both arms 6 a and 6 b due to the size difference between the table 9 and the opening portion of the pit 1, and is a pair of rectangular metal plates. The side 31 is locked to the end of the pit opening, and the other set of one side 32 is rotatably pivoted to the end of the opening. The back side of the pit cover 30 near the remaining side 33. The wheel 35 is provided on the vehicle through the attachment member 34. When the stored lift moves up and down, as shown in FIG. 4, the wheel 35 comes into contact with the ascending / descending cylinder 12 of the long arm 6b to be tilted, and the other side 33 is linked to the tilting operation of the long arm 6b. , The pit cover 30 is pushed up as shown by the alternate long and short dash line, the openings of the pits 1 and 1 are opened, and the lift is raised. The lifted pit cover 30 is gradually lowered as the lifting cylinder 12 moves toward the connecting shaft 3a, and when the wheels 35 do not come into contact with each other, that is, when the lift has finished standing, the pit cover 30 is opened as shown in FIG. It covers again and closes the pits 1 and 1. In addition to the wheels 35 that move along the lifting cylinder 12, a sliding member 36 is provided on the back surface of the pit cover 30 near the side 33 to slide on the upper surface of the lifting cylinder 12 when the long arm 6b is tilted. You may let me. In the embodiment, the outer shape of the pit cover 30 is rectangular and covers the open portion due to the size difference between the table 9 and the opening portion of the pit 1 when the lift is stored. An auxiliary cover that covers the opening of the pit 1 around both arms 6a and 6b is foldably extended to one side 32. When the lift is stored, the auxiliary cover is folded and unfolded when moving up and down to surround the arms 6a and 6b. It is possible to cover the opening of the pit 1 with an auxiliary cover to further increase the work area.

[0012] Although the above-mentioned embodiment is one in which the present invention is implemented as a vehicle maintenance lift, it can be applied to a general-purpose lifting device and a parking lift depending on the size or lifting capacity of the lifting device. . The second embodiment will explain an elevating device in which a table is tilted by applying an automobile maintenance lift according to the present invention. The doll link mechanism 6 is pivotally supported on one end of the table 9, the base end of the short arm 6a of the doll link mechanism 6 is pivotally supported on the base, and the tip of the long arm 6b is slidably provided on the corrugated rail 5. . A cylinder 40 is attached to the table 9 and the tip of the short arm 6a in the doll link mechanism 6, and when the piston 41 of the cylinder 40 extends, the table 9 is lifted and its inclination can be changed. In addition to this lifting device, it can be used for loading machines and pallets for parking lifts.

[0013]

[Effect of device]

 ADVANTAGE OF THE INVENTION According to this invention, the number of parts, such as arm parts which comprise a link mechanism, is required to be accurate, and it is possible to provide an automobile maintenance lift at low cost. The amount of looseness caused by long-term use is negligible for the entire vehicle maintenance lift, and there is a work space under the table when moving up and down, improving work efficiency. Also, since the push rod expands and contracts, it can be applied to a throwing machine that needs to tilt the table. In addition, the pit cover of the present invention covers the open part due to the difference in size between the table and the pit opening part when stored, which prevents falling and also covers the pit opening part on the side of both arms when moving up and down. Can be expanded.

[Brief description of drawings]

FIG. 1 is a perspective view of an automobile maintenance lift according to the present invention.

FIG. 2 is a front view of the vehicle maintenance lift in an extended state.

FIG. 3 is an explanatory diagram of a push rod.

FIG. 4 is a front view of the automobile maintenance lift in a contracted state.

FIG. 5 is an explanatory view showing a lifting device of a second embodiment.

FIG. 6 is an explanatory view showing a conventional vehicle maintenance lift.

[Explanation of symbols]

1 ... Pit, 1a ... Base, 2 ... Connecting passage, 3a
..Coupling shafts, 4 ... Bearings, 5 Rails, 5a ... Wheel holding members, 6 ... Doll link mechanism, 6a Short arms, 6b Long arms, 8 Rollers, 9 ...
Table, 10 ... Push rod, 10a ... Right screw, 10b ... Left screw, 11 ... Pressure device, 12, 40
..Elevating cylinders, 13, 41 ... Pistons, 20 ...
Rack, 21 ... Locking claw, 30 ... Pit cover, 31
..One set side, 32,33 .. One side, 34..Mounting member, 35..Wheel

Claims (3)

[Scope of utility model registration request] 1. A table for supporting an automobile, a short arm having a base end pivotally attached to one end of a base, and a cross arm pivotally attached to a portion inside the tip of the short arm, the tip being pivotally attached to one end of the table. In addition, a long arm having a base end slidable along the base, a tip end portion of the short arm, and a portion of the table at least one end of the intersection of the both arms are pivoted at both ends. In a lift for automobile maintenance provided with a link mechanism composed of a push rod connected in a worn state, a correction curve corresponding to a tilt angle of a table tilted by a lifting operation on a sliding surface with a base end of the long arm. An automobile maintenance lift characterized by being provided with. 2. The lift for vehicle maintenance according to claim 1, wherein the push rod has a length adjustable by a turnbuckle mechanism. 3. The base is installed on the inner bottom surface of the pit, and one side is rotatably pivotally attached to the opening of the pit, and the other side is provided with an openable / closable pit cover linked to the raising and lowering operation of the long arm, The vehicle maintenance lift according to claim 1, wherein the pit opening can be closed when the table is stored and lifted.