JPH05147509A - Balance synchronizing method for vehicle residing board of automobile - Google Patents

Abstract

PURPOSE:To simplify the structure of lifts, reduce visibly identifying work and improve labor saving effect by providing synchronous shafts via a clutch for linking the mutually facing oblique members of a pair of pantagraph mechanisms so that torsion arising in the synchronous shafts can be detected and modified by a hydraulic circuit. CONSTITUTION:Synchronous shafts 1, 3 via which lifts 5a, 5b for a pair of pantagraph mechanisms are connected to each other are engaged together via a clutch 2, and a detector 4 is provided on the synchronous shafts 1, 3 to detect the displacement developed by torsion which gives rotational movement to its cross section. Vehicle residing boards 11a, 11b are individually loaded by cylinders 8a, 8b arranged so as to be driven up and down, to a position where they are changed from unloaded condition to loaded condition, and then the clutch 2 is put in engagement to incorporate the synchronous shafts 1, 3 in one for lifting a load. In this way, the cylinders 8a, 8b are controlled by a hydraulic circuit with a signal which is detected by the detector 4 for torsion so as, to keep a pair of lifts 5a, 5b in always balanced condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle platform device for mounting and hoisting a vehicle for the purpose of securing a working space for inspecting and servicing the vehicle, and more particularly, to enable the vehicle to be held horizontally. The present invention relates to a balancing synchronization method for always allowing the lift to be used to be balanced so that lifting and lowering can be performed.

[0002]

2. Description of the Related Art Conventionally, as for a mounting base or a lift base of an automobile and its operating method, a hydraulic circuit attached to a cylinder, a piston or a plunger (hereinafter referred to as a cylinder) of a mounting base device (hereinafter referred to as a lift) and its operating system There is one related to an auxiliary device, and as described in JP-A-52-135159, a lift arranged separately for its front wheels and rear wheels is provided with a hydraulic power source having individual forward and reverse rotatable pumps, One that is integrally controlled on a circuit in accordance with the difference in load related to each lift, and as described in Japanese Utility Model Publication No. 57-18398 filed by the applicant of the present application, the hydraulic pressure of hydraulic oil, which is a drawback of the technology described in the above publication, There are proposals to remove the stay phenomenon in the circuit and the excessive load on the seal structure in the used cylinder. Further, as shown in FIG. 7, the center of the bases 30 provided on the left and right sides is arranged so that the vehicle can be integrally lifted as shown in FIG. Lift columns 30a and 30b on the base 3
The movable beams 31 to 33 are interposed between 0 and 0 in a telescopic manner to mechanically form an integrated lift, which is arranged so that it can be lifted and the mounting plate 36 can be extended in the vertical direction shown in the figure. There is a simplified version of lifting. The arrow in the figure indicates the direction of entry and exit of the vehicle.

In this type of lift, it is necessary to operate the lift so that the lift of the vehicle can be maintained in a horizontal state regardless of the weight of the vehicle to be handled, and a step-like operation phenomenon does not occur in the lift when the lift is raised or lowered. As such, the equilibration operation was important. There should have been no dangerous imbalance that could cause the mounted vehicle to disengage from the lift, but if the imbalance can be corrected immediately, an uneven load will occur. In addition to the static load in the vertical direction, which is assumed to be, the situation in which the load is concentrated is dealt with, the structural strength of the lift is adapted, and the operation system such as the hydraulic circuit is dealt with. Therefore, the structure of the lift can sufficiently cope with the case where the mounted vehicle causes some inclination and the maximum load occurs on the wheels or the mounted position of the vehicle,
In addition to the vertical load, it was natural to incorporate the bending moment and other design elements for strength calculation, and then select the material and size of the member.

[0004]

However, when a vehicle lift is manufactured on the assumption of vehicles of various sizes, for example, a front wheel lift and a rear wheel lift are paired into one set. As shown in FIG. 2, the two lifts are not necessarily placed on the same horizontal plane as shown in FIG. 2, so they are not always on the same horizontal plane, and it is difficult to correctly set the pair of lift axes by visual inspection, or This requires the operator to pay close attention to the operation, and therefore, the hydraulic circuit for balancing operation, which satisfies the operation and simultaneously lifts both lifts, becomes complicated, and the manufacturing cost therefor is expensive, and Considering the factors corresponding to the load change at the time of unbalance, the lift that determines its structure should have a larger lift cross-sectional area and heavier weight so that it can be safely handled. In the case where the size of the pair of lift sets is variable according to the size of the vehicle, the variable structure of the lift capable of balanced operation has the following strength determination when the unbalanced state is dealt with. We have to be careful and oversize its structure. On the other hand, the lift is generally stored in the pit, and when not in use, the upper part of the lift can be used for other work. Therefore, it is desirable that the size of the pit is small so that part of the lift is not exposed to the floor as much as possible when the pit is not used so as not to hinder the work. Furthermore, the projected area of the lift itself should not be so large that the structure of the lift itself may hinder the maintenance and inspection of the vehicle when the lift is used. The lift shown in FIG. 7 represents a general problem of the prior art, the pit and the projected area thereof are large, and the head of the lift column always projects from the floor, which is not a desirable example. That is, the above-mentioned conventional technique does not give a deep consideration to the nature of the load applied to the lifts, and therefore analyzes the difference in the nature of the member stresses acting on the respective members of each lift for the synchronous operation during lifting of the pair of lifts. There has been no proposal for a lift balance synchronization method that solves the problem of balance operation of a pair of lifts by clarifying the properties of the stress without doing so and also enables good vehicle maintenance.

In view of the drawbacks of the prior art, the object of the present invention is to
While simplifying the balanced lifting operation of the pair of lifts and adding a means to increase the automation rate, while improving work,
From a technical aspect that such conventional technology has not taken up, intervening variable members are provided in the lift structure to perform equilibrium synchronization, which makes it possible to reduce the weight of the lift structure and realize a safer vehicle mount. It is an object to provide a balanced synchronization method.

[0006]

The present invention, as shown in FIGS. 1 to 3, includes upper and lower members 55 and 58 including oblique members 52 and 53 that are rotatably connected to each other via an axis 51. Synchronous shafts 1 and 3 connecting between a pair of lifts 5a and 5b having a pantograph-type mechanism in which each coupling point is rotatable.
Is engaged through a clutch 2 that can be connected, and a twisting mechanism is generated in the synchronous shafts 1 and 3 for rotating its cross section, and a detection device 4 is located at a position where the displacement represented by the twisting can be detected. A vehicle mounting base 1 for the lifts 5a, 5b
Cylinder 8 in which 1a and 11b are arranged to be vertically movable
a, 8b individually lifts from each vehicle weight mounting position, that is, a position from a no-load state to a loaded state, and then the clutch 2 is connected to integrally synchronize the synchronous shafts 1 and 3 and lifted. In addition, when the lifts 5a and 5b do not work in balance, the detection device 4 detects the twist generated in the structurally integrated synchronous shafts 1 and 3 and generates a signal. By controlling the branch circuit on the side for correcting the twist by a hydraulic circuit 12 capable of controlling the cylinders 8a, 8b, a pair of lifts 5a,
It is characterized in that 5b is synchronized so that it is always in an equilibrium state. The single line member shown in FIG. 4 represents a lift formed by combining two self-supporting diagonal members. Therefore, FIG. 4 shows two lifts 5 on the left and right.
Express a and 5b.

Further, the hydraulic circuit 12 has the detecting device 4
Of the pair of cylinders 8a and 8b when no load is applied to perform a balance operation, and when the detection device 4 is loaded, the hydraulic solenoid valve 13a or 13b interposed in one of the branch circuits by the signal. And a circuit for correcting the unbalanced state generated in the pair of cylinders 8a and 8b.
Further, the pair of the diagonal members 52 or 53, which show the operation in the same direction during the lift-lifting operation, form a part of the load-bearing member of the vehicle platform 5. Further, the pair of the diagonal members 52 or 53 is one member of an attachment mechanism of the vehicle platform 5. Further, the synchronous shaft 1 or 3 includes a flexible shaft. In detecting the twist displacement, the displacement is 1)
Converted to the rotation amount of the synchronous shaft, the predetermined rotation amount is 2)
Strain caused by twisting on the surface of the synchronous shaft by using a strain stress gauge, etc. 3) Stress or pressure of the shaft material caused by twisting on the surface of the synchronous shaft directly or indirectly through a sensitive material The method of detecting the moire or the change in the potential difference respectively and controlling the hydraulic circuit in the direction to eliminate the detected amount, and the confirmation that both the lifts contact both the mounting positions of the vehicle are as follows. A method of attaching a piezoelectric element or a piezoelectric plate and connecting the clutch by a signal emitted when the attached object confirms a predetermined load can be appropriately selected and determined to be an embodiment of the present invention.

In the present invention, claim 1 is shown in FIGS. 1 to 4, claim 2 is shown in FIGS. 2 to 4, claims 3 and 4 are shown in FIG. 3, claim 5 is shown in FIG. The contents are illustrated respectively.

[0009]

According to the above technical means, as in the above-mentioned conventional invention, the load factor applied to the lift of the vehicle is variously designed, the lift structure is determined, and the lift operation depends on the visual check. Therefore, there is no need for the operator to perform the balanced synchronizing operation, and as shown in FIG. 1, when entering the operation process that requires the balanced operation of both lifts, the synchronizing shaft is moved to the left and right via the clutch. When an unbalanced state occurs between the lifts associated with the lift and the synchronous shaft integrated as shown in FIG. 3, the twist generated in the synchronous shaft is detected as a displacement amount that can be confirmed. It is a method of operating and controlling the components of the hydraulic circuit so as to eliminate the twist generated by the detection signal, so that the lift can be operated and controlled so that it always receives only the vertical load, and other designs It is not necessary to reinforce the lifting structure including a cross section in view of the child, thus simplifying the lift structure may be a small and light. The synchronous shaft disposed between the two lifts need only be capable of exhibiting a twisting phenomenon, so that the shaft does not need to have sufficient rigidity, and the shaft diameter may be small. Since the lift can form its synchronous axis by the flexible shaft, it is easy to arbitrarily and variably install the pair of relative positions of the lift. Further, since the visual recognition action of the operator required for the lift operation can be significantly reduced and the remote operation can be performed, labor saving, improvement of the working environment, and improvement of safety can be ensured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the constituent parts described in this embodiment are not intended to limit the scope of the present invention thereto unless otherwise specified, and are merely illustrative examples. Nothing more than. FIG. 1 is a partial front view for explaining a main part around a clutch according to an embodiment of the present invention, in which a synchronous shaft 1 connected to a (a) side lift and equipped with a detection device 4 is provided with a clutch 2 (b). It can be connected to the synchronous shaft 3 that is connected to the side lift.
The clutch 2 has detachable clutch plates 2a and 2b therein and can be controlled by remote control like an electromagnetic clutch. FIG. 2 is a partial hydraulic circuit diagram for explaining an essential part around a cylinder according to an embodiment of the present invention, in which a differential gear part 10a, 1 which bears a load of a vehicle.
Up to the position of 0b, the hydraulic power source 20 that constitutes the hydraulic circuit 12
Further, an equal amount of hydraulic pressure is divided by the flow dividing valve 15 via the hydraulic pressure gap 14c, and the cylinders 8a and 8b are divided by the hydraulic pressure amount.
Drive. That is, the vehicle is lifted above the common lifting height H0 to fill the gap G between the height positions of one and the other of the vehicles, and the lift 5 is moved to a position where the vehicle can be horizontally lifted.
The mounting bases 11a and 11b are driven upward, and when the position is reached, the synchronous shafts 1 and 3 are connected and integrated by the clutch 2 through a confirmation step.

FIG. 3 is an action diagram for explaining the principle of the present invention. The upper and lower members 55, 58 constitute a pantograph type mechanism by the oblique members 52, 53, and the oblique members 52, 53 are rotatable. The center of the upper and lower members 5
One of the end portions of 5, 58 engages with fixed shaft pins 54, 56 that make the connection point with the diagonal members 52, 53 rotatable, and the other end with the diagonal members 52, 53. The connecting point is configured as a moving shaft pin 57 that is rotatable and can be moved back and forth. The above pantograph-type mechanism forms a lift set having two left and right lifts as a set.
The synchronous shaft 1A can be integrally formed between the lifts of the platform. The synchronous shaft links a pair of opposing diagonal members 52a, 52b of the both lifts, which are rotatable by a lifting operation. The synchronous shaft 1A is located on the right side of the drawing.
6A and 6B are axially cross-sectional views schematically enlarged. In the figure, the right-side lift has its two-dot chain diagram in equilibrium with the left-side lift, and the solid line diagram is in an unbalanced state.
It shows that a gap G is formed between the left lift.

FIG. 4 is a hydraulic circuit diagram of one embodiment of the hydraulic circuit applied to the present invention. The hydraulic pressure supplied from the hydraulic pressure source 20 is a shunt flow whose hydraulic quantity distribution can be precisely controlled via the hydraulic pipe 14c. A valve 15 (for example, trade name “Deco Valve” manufactured by Takami Seiki Co., Ltd.) is diverted, and a mounting table is brought into contact with the vehicle via the hydraulic solenoid valves 13a and 13b of the branch pipes 14a and 14b. Hydraulic circuit 12 communicating with directly connected cylinders 8a, 8b
To form. The cylinders 8a and 8b are also engaged with the detectors 7a and 7b of the detector 4, and the detectors 7a and 7b can be operated by the movement of the cylinders 8a and 8b. When the detectors 7a and 7b are activated, the signal generated by them activates one of the control sides of the hydraulic solenoid valve 13 that erases and corrects the displacement. Each of the cylinders 8 is provided with an air cylinder 21 capable of holding the state of the cylinder constant and capable of releasing the holding, which is pre-pressurized to a predetermined pressure by an air source 29 through a required air circuit. .. Although the above description has been given of the circuit device that operates exclusively for raising, the lift valve 17 in the drawing is excited and adjusted by a known means using an electric control circuit (not shown) when the lift is lowered. Throttle valve 1
The amount of oil is evenly taken out from both cylinders 8 via 6 and returned to the oil tank 28.

FIG. 5 is an overall plan view showing a first embodiment of a lift set to which the present invention is applied. A vehicle in which one lift set is housed in a pit 9 and has an axle spacing Q is seen from the direction of the arrow in the figure. When the vehicle enters and stops on a lift 5 having a lift width W and a lift length L, one lift 5 mounts the front and rear wheels of the vehicle, and the lift 5a , 5b are linked by the synchronous shafts 1, 3 and the clutch 2 and the detection device 4 to form a lift set for one vehicle having a width of N, and the two lifts 5a, 5b are exclusively operated from the initial state. The case of a combination suitable for the case of horizontally operable operation is shown. FIG. 6 is an overall plan view showing a second embodiment of a lift set to which the present invention is applied, in which lifts 5c and 5d are arranged at right angles to the approaching direction of the vehicle, and the lift d is used for vehicles having different axle spacings Q. For maintenance, the synchronous shafts 1 and 3 are configured to be movable to the position of the lift 5e by the rail 34 and the lift set length thereof can be set to K1 or K2, and / or the initial state of lifting is the above two lifts. 5c,
It shows a case of a suitable combination when the mounting table positions of 5d are different. . As shown in the drawing, the fixed type and the flexible type of the synchronous shaft 3 can be freely selected depending on the arrangement state of the lift and the usage thereof.

Next, the principle and procedure of the balanced synchronization method of the present invention will be described mainly with reference to FIG. After hoisting the respective platforms to the vehicle weight loading positions of the lift of the pantograph type mechanism from the unloaded state to the loaded state, the clutch 2 is connected and the synchronous shafts 1 and 3 are integrated. When lifted, the left lifts shown in FIG. 3 of both lifts are connected to the lifts shown by the two-dot chain line on the right side, and the shaft section 6A of the synchronous shaft 1A is subjected to the lifting operation in balance,
As long as the variable increments of the lift height are equal,
The synchronous shaft 1A simply moves in parallel from the initial position,
The position C1 of the initial horizontal line of the synchronization axis and the initial horizontal line C0 are
It won't change.

However, when an unbalanced state of height G occurs between the lift on the left side and the lift indicated by the solid line on the right side, the synchronous shaft 1A forms an axial cross section 1B. Change occurs. That is, the lifting is performed by the rotation of the oblique member 52 about the fixed shaft pin 56 as R, and the gap G of the lifting height is generated in the two lifts, which means that the rotation angles of the two lifts are different. means. If the rotation angle is different, the axial cross section 6B of the synchronous shaft 1B integrated by connection is
The position C1 of the initial horizontal line is displaced by the movement displacement amount e to change to the initial horizontal line C0. That is, it means that the twist is generated in the synchronous shaft 1B by the amount of the e displacement. By detecting this twisting phenomenon, the hydraulic circuit 12 is controlled to control the displacement amount e to be erased. This twist amount e becomes smaller as the equilibrium operation is performed with higher accuracy, so that it is necessary to enlarge the detection amount. Since this twist amount occurs in the left-right direction, the detection device needs to be able to recognize the direction. An appropriate signal in that direction can be instructed to the control system. Although the above-described principle and procedure have been described focusing on the ascending time, the twisting phenomenon occurs even at the descent, and the inspection device detects the twisting and controls the control system by the generated signal. The procedure is similar. The balance synchronizing method of the present invention may be used as a dummy device attached to the main body without being directly arranged on the load applying device, on the principle of a single balance synchronizing device arranged between the two lifts. It is also a method that can be implemented in a formula.

[0016]

As described above, according to the present invention, a simple synchronizing shaft is detachably connected as needed, and the unbalanced state is detected for the twisting phenomenon occurring in the synchronizing shaft. As a result, the structure of the lift that bears the load is simplified and the weight is reduced, while the visual inspection work of the operator is greatly reduced, the labor saving effect and the remote operation are improved, and moreover, the balanced operation makes it possible to use a plurality of lifts. Various arrangements, such as presenting a technology that reduces initial investment, such as separately arranging each wheel and performing a combined operation as a pair of lift sets, and also making it possible to minimize the pit size as an installation space It becomes possible to provide a reliable full-scale lift equilibrium synchronization method for the first time in the present invention, which has a remarkable effect, and its practical value is extremely large.

[Brief description of drawings]

FIG. 1 is a partial front view illustrating a main part around a clutch according to an embodiment of the present invention.

FIG. 2 is a partial hydraulic circuit diagram for explaining an essential part around a cylinder according to an embodiment of the present invention.

FIG. 3 is an action diagram illustrating the principle of the present invention.

FIG. 4 is a hydraulic circuit diagram of an embodiment of a hydraulic circuit applied to the present invention.

FIG. 5 is an overall plan view showing a first embodiment of a lift set to which the present invention is applied.

FIG. 6 is an overall plan view showing a second embodiment of a lift set to which the present invention is applied.

FIG. 7 is an overall plan view showing a conventional technique.

[Explanation of symbols]

1,3 Synchronous axis 1A Synchronous axis in A state 1B Synchronous axis in B state
2 Clutch 3a Rod 3b Shaft center rod
4 Detector 5 Lift 6A Axial cross section A
6B axial section B 7 detector 7a a side detector
7b b-side detector 8 cylinder 8a a-side cylinder
8b b side cylinder 11 vehicle mount 11a a side mount
11b b side mount 12 hydraulic circuit 13 hydraulic solenoid valve
15 flow-dividing valve 52a a side oblique member 52b b side oblique member
C horizon C0 initial horizon e Axis displacement
G Lift difference

Claims (5)

[Claims] Claim: What is claimed is: 1. A synchronous shaft via a connectable clutch for linking opposing diagonal members of a pair of pantograph-type mechanisms forming a part of a vehicle platform, wherein the vehicle platform is individually separated by a cylinder. When the vehicle is lifted to the respective vehicle weight mounting positions, the clutch is connected to integrate the synchronous shaft to further lift the cylinder, and when the synchronous shaft is twisted to rotate its cross section, , Causing a detection device disposed on the synchronous shaft capable of detecting the displacement represented by the twist,
A balanced synchronization method for an automobile vehicle mount, characterized in that a branch circuit on the side for correcting the twist is controlled by a hydraulic circuit capable of controlling the cylinder by a signal generated by the detection device. 2. The hydraulic circuit operates a shunt valve for a pair of the cylinders to perform a balance operation when the detection device is not loaded, and when the detection device is loaded, one of the branch circuits is activated by the signal. An equilibrium synchronization method for a vehicle-carrying platform, wherein an intervening hydraulic solenoid valve is operated to correct an unbalanced state that has occurred in the pair of cylinders. 3. A balance synchronization method for an automobile vehicle mount, wherein the oblique member forms a part of a load applying member of the vehicle mount. 4. An equilibrium synchronization method for an automobile vehicle mount, wherein the oblique member is one member of an attachment mechanism of the vehicle mount. 5. The method for balancing equilibrium of an automobile vehicle mount, wherein the synchronizing shaft includes a flexible shaft.