JP2015131694A - pantograph type jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pantograph type jack of which stability at the time of rising is promoted, and a jack follows rising of a vehicle to suppress bending of respective parts of the jack, for reduction in weight as a whole and smooth rising/lowering operation.SOLUTION: In a pantograph type jack, a bottom plate part of a base includes a planar central outside surface part having a width required for self-supporting, and a left side outside surface part and a right side outside surface part which are connected on both left and right sides of the central outside surface part, with an inclination angle generated when a vehicle is jacked up formed to be an arc-like plane of a cylindrical surface having a width and radius allowing turn by contacting to a load surface.

Description

  The present invention relates to a pantograph jack.

Patent Document 1 discloses a load receiving base 2, a pair of first arm members 11 and 12 whose upper end portions 11 a and 12 a are rotatably supported by the load receiving base, and lower ends of the pair of first arm members 11 and 12. A pair of second arm members 13 and 14 whose upper end portions 13a and 14a are rotatably connected to the portions 11b and 12b, respectively, and lower end portions 13b and 14b of the pair of second arm members 13 and 14 are rotated. A pedestal 15 that is movably supported, and a screw member 8 that is rotatably disposed between the pair of first arm members 11, 12 and the connection points 6, 7 of the pair of second arm members 13, 14. In the rhombus-shaped panda graph jack 10 as described above, a panda graph jack having a configuration in which a bottom surface 15a of a base 15 is inclined with respect to an upper surface 2a of a load receiving platform 2 is disclosed.

In Patent Document 2, a support arm 3 has a support head 4 that acts on a vehicle body at its free end, and the support arm 3 is directly or separately attached to the support arm 3 and the support side leg 1. At the installation position, which is pivotally adjustable by means of a manually operated adjustment mechanism, in particular a threaded spindle 5, which is movably connected via a lever and hinge of A jack is disclosed in which a support portion 15 mounted on the road surface 11 behind the installation foot portion 8 on the side opposite to the vehicle is configured as a metal thin plate tongue piece and is firmly connected to the support side leg 1. .

In Patent Document 3, the jack main body 1 is provided with an outer cylinder portion 11 on the upper side thereof, and the jack main body 1 is formed to have a larger diameter than the outer cylinder portion 11 and is supported by a jack mounting surface G. The bottom surface portion 12 of the jack main body 1 is formed in a spherical shape, and a ring capable of supporting the jack J upright by abutting between the outer peripheral portion side of the spherical bottom surface portion 12 of the jack main body 1 and the jack mounting surface G. A jack is disclosed, in which an elastic support member 3 is provided.

In the invention disclosed in Patent Document 1, since the bottom surface 5a of the pedestal 5 is formed to be inclined, the direction of the load F1 received from the vehicle body 9 is on a line connecting the centers of the load receiving pedestal 2 and the pedestal 5. Therefore, since it is on the same line as the direction of the reaction force F2 from the pedestal 5, stability can be maintained.
However, in the actual jackup, only one wheel is lifted while the four wheels are in contact with the road surface, and the suspension of the wheel is different between the front and rear, so that the vehicle body 9 is different at the start of the lift and at the end of the jackup. The ascending directions are different and do not rise linearly in the meantime, but are arc-shaped and cannot be followed only by the above configuration.

In the invention disclosed in Patent Document 2, as described above, the support arm 3 and the support side leg 1 perform turning adjustment by the threaded spindle 5 to stand up and raise the vehicle body. A configuration is disclosed in which the front end of the installation foot portion of the support side leg 1 is formed on a rolling foot portion 8 having an arcuate bottom surface, and the support arm 3 and the support side leg 1 are not subjected to bending stress when standing. In this jack, since the support arm 3 and the support leg 1 are configured on only one side, a support portion 15 for the road surface 11 is widely provided on the opposite side of the rolling foot portion 8, but it is left in an upright state Is not possible.

In the invention disclosed in Patent Document 3, the proposed embodiment 1 has a problem of frictional force with a bearing surface such as a road surface because the bottom surface portion 12 of the jack body 1 has a spherical shape (circular arc shape). It is inconvenient because it is not self-supporting when set with a vehicle. The embodiment 2 solves the above-mentioned problem because the upright elastic support member 3 is prepared and combined as a separate body, but there is an inconvenience of combining the upright elastic support member 3 with the jack body 1 prior to installation. . Further, as another embodiment, it has been proposed to integrate the upright elastic support member 3 with the jack body 1, but a specific configuration is not disclosed.

JP-A-6-183695 JP-A-6-329394 JP 2007-22356 A

In order to change the punctured tire of the car, it is necessary to float from the ground, and the jack is set at the jack up point of the car body and raised, but the base supporting the load is supported on the road surface in the same posture, so The burden on the base is large due to tilt, movement, etc., which may cause the arm to bend, twist, disengage the gear, etc. Furthermore, the bent jack of the arm may fall down and become unusable.

In order to eliminate the above-mentioned drawbacks, the present invention provides a flat portion on the bottom surface of the base to achieve stability at the time of standing as in the prior art, and the right and left side portions of the bottom surface are arcuate surfaces (cylindrical surfaces). It proposes a pantograph-type jack that can keep the weight of the whole part of the jack down and suppress the bending of each part of the jack so that the entire body can be lightened and can be lifted and lowered smoothly.

  The bottom plate of the base is connected to the flat central outer surface of the width required for self-supporting and both the left and right sides of the central outer surface, and can be rotated by contacting the road surface with the inclination angle generated in the vehicle weight There is a pantograph jack formed of a left outer surface portion and a right outer surface portion formed on an arcuate surface of a cylindrical surface having a width and a radius.

  The bottom plate portion of the base has a central outer surface portion having a width of about 1/3 of the entire left and right width, a left outer surface portion on both sides and a right outer surface portion having a width of about 1/3 of the entire left and right width, and the outer surfaces thereof. It may be formed on a cylindrical arc-shaped surface having a required radius required for a turning angle that turns in contact with the road surface.

The pantograph-type jack of the present invention has a center plane outer surface portion formed on the bottom plate portion of the base to achieve stability at the time of standing as in the prior art, and left and right sides of the bottom plate portion on both sides of the center plane outer surface portion are arcuate surfaces ( As a cylindrical surface), the jack is made to follow the ascent of the vehicle, and the bending of each part of the jack is suppressed, so that the entire weight can be reduced and the smooth raising / lowering operation can be performed.

It is a front external view of the pantograph jack of the present invention. It is a front view shown with the partial cut section of the base simple substance used as the principal part of the pantograph type jack of the present invention. Similarly, it is a top view of a single base. Similarly, it is a bottom view of a single base. It is sectional drawing which follows the AA line of FIG. It is an explanatory side view showing the radius length which forms the arcuate surface of the front part of the base, and the rear part, and the origin position. It is a 1st arcuate surface explanatory bottom view formed in the front part and rear part of a base. It is a 2nd arcuate surface explanatory bottom view formed in the front part and rear part of a base. It is a schematic explanatory side view which shows the state which jacked up the front left wheel of the motor vehicle with the conventional pantograph type jack. FIG. 10 is an enlarged explanatory side view of a portion of the pantograph type jack of FIG. 9. It is an expansion explanatory side view of the part of the state jacked up by the pantograph type jack of the present invention.

The bottom plate portion 10a of the base 10 has a front and rear length of the base 10 of 125 mm, a left and right width of 90 mm, a left and right width of the flat central outer surface portion of 30 mm, and a width of the left outer surface portion 18 a and the right outer surface portion 18 b on both sides of 30 mm respectively. The outer surface is formed as a cylindrical surface having a radius of 1447 mm.

  Hereinafter, the pantograph jack of the present invention will be described by way of examples. The pantograph jack 1 of the example is composed of the following members.

The screw rod 2 has a front end formed in the flange portion 3, and a connecting plate 4 provided with an engagement hole 4 a penetrating from the left and right on the front end surface of the flange portion 3.

The back side of the flange portion 3 of the screw rod 2 is formed in an idler portion 2a for supporting the metal shaft 5 so as to be freely rotatable in a fixed position, and a portion extending from the rear intermediate portion to the rear end thereof is a female screw. It is formed in a screw part 2b for screwing the shaft 6.

The front upper arm 9a, whose upper end is pivotally connected by a front upper support shaft 8a supported on the left and right sides of the front half 7a of the load receiver 7, has a lower end positioned at a fixed position on the free rotation portion 2a of the screw rod 2. The metal shaft 5 is fitted so as to be freely rotatable and is rotatably connected.

A rear upper arm 9b whose upper end is pivotally connected by a rear upper support shaft 8b supported horizontally on the rear half 7b of the load receiver 7 is screwed at the lower end to the screw 2b of the screw rod 2. The female screw shaft 6 is rotatably connected to the female screw shaft 6.

The front lower arm 13a, whose lower end is pivotally connected by a front lower support shaft 12a that is supported on the left and right front sides of the left shaft support wall portion 11a and the right shaft support wall portion 11b of the base 10, has an upper end portion that is threaded. A metal shaft 5 that rotates freely on the front end of the rod 2 is rotatably connected.

A rear lower arm 13b whose lower end is rotatably connected by a rear lower support shaft 12b that is supported on the left and right rear sides of the left axis support wall portion 11a and the right axis support wall portion 11b of the base 10 has an upper end portion. The screw rod 2 is rotatably connected to a female screw shaft 6 that is screwed into the screw portion 2b.

A handle (not shown) is connected to the engagement hole 4a of the connecting plate 4 of the flange 3 of the screw rod 2, and the screw rod 2 is rotated by rotating the handle so that the female screw shaft 6 is moved forward or relative to the metal shaft 5. It moves rearward, moves the front upper arm 9a, the rear upper arm 9b, the front lower arm 13a, and the rear lower arm 13b back and forth, expands and contracts the whole, and lifts the load receiver 7 with respect to the base 10. is there.

  The thrust receiver 14 is disposed between the flange 3 and the metal shaft 5 to facilitate the rotation of the screw shaft 2.

The base 10 is formed in the shape shown in FIGS. 2 to 8, and the bottom plate portion 10a is divided into a front bottom plate portion 10a1, a rear bottom plate portion 10a2, and an intermediate bottom plate portion 10a3 in the front and rear directions, and on both side edges of the intermediate bottom plate portion 10a3. The left-axis support wall portion 11a and the right-axis support wall portion 11b that stand in parallel at a distance of equal distance from the center are erected upright.

The left side supporting wall 11a and the right side supporting wall 11b of the intermediate bottom plate 10a3 have a shape projecting in a similar triangle on the front side of the left shaft supporting wall 11b, and the front left edge is raised upward to the left, right and front edges. A front bottom plate portion 10a1 is formed which includes a standing wall portion 15a1, a front right edge standing wall portion 15a2, and a front front edge standing wall portion 15a3, and has a shape projecting in a similar triangle on the opposite rear side. A rear bottom plate portion 10a2 is formed in which a rear left edge standing wall portion 15b1, a rear right edge standing wall portion 15b2, and a rear rear edge standing portion 15b3 are formed on the left, right and rear rims, respectively.

From the upper edge 11a1 of the left shaft supporting wall portion 11a and the upper edge 11b1 of the right shaft supporting wall portion 11b to the upper edge 15a1a of the front left edge standing wall portion 15a1 and the upper edge 15a2a of the front right edge standing wall portion 15a2, and the left From the upper edge 11a1 of the shaft support wall portion 11a and the upper edge 11b1 of the right shaft support wall portion 11b, the upper edge 15b1a of the rear left edge standing wall portion 15b1 and the upper edge 15b2a of the rear right edge standing wall portion 15b2 are respectively reduced. As shown in the figure, the end ends coincide with the upper edge 15a3a of the front side leading edge standing wall part 15a3 and the upper edge 15b3a of the rear side rear edge standing wall part 15b3 which are formed upward on the peripheral edges of the front bottom plate part 10a1 and the rear bottom plate part 10a2. Is done.

Reference numeral 15a4 denotes a front side leading edge rising wall portion removing portion formed at the center of the front side leading edge rising wall portion 15a3. Reference numeral 15b4 denotes a rear side rear edge standing wall portion removing portion formed at the center of the rear side rear edge standing wall portion 15b3.

  A front left bearing hole 16a1 and a front right bearing hole 16a2 are correspondingly opened on the front side of the left shaft supporting wall portion 11a and the right shaft supporting wall portion 11b, respectively, and a rear left bearing hole 16b1 on the opposite rear side. The rear right bearing hole 16b2 is opened.

The base 10 includes the left shaft supporting wall portion 11a, the right shaft supporting wall portion 11b, the front left edge standing wall portion 15a1, the front right edge standing wall portion 15a2, the rear left edge standing wall portion 15b1, the rear right edge standing wall portion 15b2, Formed on the bottom plate portion 10a inside the front leading edge standing wall portion 15a3 and the rear trailing edge standing wall portion 15b3 is a middle high-bulged middle bottom portion 17 that protrudes upward in a shape in which the peripheral edge thereof is separated from the respective portions in a similar shape. The

As described above, the bottom plate portion 10a of the base 10 is divided into the front bottom plate portion 10a1, the rear bottom plate portion 10a2, and the intermediate bottom plate portion 10a3 in the front and rear, and the front bottom plate portion 10a1, the rear bottom plate portion 10a2, and the intermediate bottom plate portion 10a3 are described above. It is formed as follows.

  The bottom plate portion 10a of the base 10 is formed in a flat surface with the central outer surface portion 18 of the outer surface being about 1/3 of the overall width, and the left outer surface portion 18a and the right outer surface portion 18b on both sides thereof are each 1/3 of the entire width. The left outer surface portion 18a and the right outer surface portion 18b are formed in a cylindrical surface arc-shaped surface having a required radius.

The left and right widths of the central outer surface portion 18 have a width required for self-supporting, and the left and right widths of the left outer surface portion 18a and the right outer surface portion 18b are in contact with the road surface corresponding to the following inclination angle when the vehicle is loaded. A radius is selected that can be faced to form an arcuate surface required for rolling to form the required width.

An embodiment that specifically satisfies the above conditions of the bottom plate portion 10a of the base 10 will be described. As shown in FIGS. 6 and 7, the front and rear length is 125 mm, the left and right width is 90 mm, The width of the left outer surface portion 18a and the right outer surface portion 18b on both sides thereof is 30 mm, and the outer surface is a cylindrical surface having a radius of 1447 mm.

  As shown in FIG. 8, even if the outer dimensions are the same, the horizontal width of the flat central outer surface 18 is 45 mm, the left outer surface 18a and the right outer surface 18b on both sides are 25 mm, and the radius of the outer surface is the same 1447 mm. It is formed on a cylindrical surface.

  As shown in FIG. 9, the conventional jack 20 of the same type has a large load on the base 22 of the jack 20 due to the inclination, movement, displacement, etc. of the car 21 when it is set at the jack-up point and raised. At that time, since the load is received by the load receiver 23 and the supporting base 22 is level with the road surface 24, the arms 25 and 26 of each part are twisted, bent, and the gear is disengaged, and the bent jack 20 falls down. Sometimes it was not used.

In the pantograph jack of the present invention, the outer surface shape of the bottom plate portion 10a of the base 10 is formed as a cylindrical arc-shaped surface having a required radius as described above, and therefore, as shown in FIG. 7 moves left and right and tilts by 1 degree from the vertical line, the contact surface with the road surface 24 turns from the central outer surface portion 18 to the right outer surface portion 18b of the left and right cylindrical arc-shaped surfaces. In order to suppress, the receiving 7 can be raised while suppressing the bending of each part.

The pantograph-type jack of the present invention has a center plane outer surface portion formed on the bottom plate portion of the base to achieve stability at the time of standing as in the prior art, and left and right sides of the bottom plate portion are arcuate surfaces ( As a cylindrical surface), the jack is made to follow the ascent of the vehicle to suppress the bending of each part of the jack, thereby reducing the overall weight, reducing the cost, smooth raising / lowering operation and ease of handling.

DESCRIPTION OF SYMBOLS 1 Pantograph type jack 2 Threaded rod 2a Sliding part 2b Threaded part 3 Ridge part 4 Coupling plate 4a Engagement hole 5 Metal shaft 6 Female threaded shaft 7 Load receiving 7a Front half part 7b Rear part 8a Front upper support shaft 8b Rear upper support shaft 9a Front side Upper arm 9b Rear upper arm 10 Base 10a Bottom plate portion 10a1 Front bottom plate portion 10a2 Rear bottom plate portion 10a3 Intermediate bottom plate portion 11a Left shaft support wall portion 11a1 Upper edge 11b Right shaft support wall portion 11b1 Upper edge 12a Front lower support shaft 12b Rear lower Support shaft 13a Front lower arm 13b Rear lower arm 14 Thrust receiver 15a1 Front left edge upright wall 15a1a Upper edge 15a2 Front right edge upright wall 15a2a Upper edge 15a3 Front front edge upright wall 15a3a Upper edge 15a4 Front front edge upright removal part 15b1 Rear left edge standing wall 15b1a Upper edge 15b2 Rear right edge standing wall 15b2a Upper edge 15b3 Rear rear edge standing wall 1 b3a Upper edge 15b4 Rear side rear edge standing wall removal portion 16a1 Front left bearing hole 16a2 Front right bearing hole 16b1 Rear left bearing hole 16b2 Rear right bearing hole 17 Raised middle bottom 18 Central outer surface 18a Left outer surface 18b Right outer surface 20 conventional jack 21 vehicle 22 base 23 load receiving 24 road surface 25 arm 26 arm

Claims (2)

  The bottom plate of the base is connected to the flat central outer surface of the width required for self-supporting and both the left and right sides of the central outer surface, and can be rotated by contacting the road surface with the inclination angle generated in the vehicle weight A pantograph-type jack formed from a left outer surface portion and a right outer surface portion formed on an arcuate surface of a cylindrical surface having a width and a radius.   The bottom plate portion of the base has a central outer surface portion having a width of about 1/3 of the entire left and right width, a left outer surface portion on both sides and a right outer surface portion having a width of about 1/3 of the entire left and right width, and the outer surfaces thereof. 2. The pantograph type jack according to claim 1, wherein the pantograph type jack is formed in a cylindrical surface arc-shaped surface having a required radius required for a turning angle to turn in contact with the road surface.

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