KR100805881B1 - Aluminium jack for vehicle, manufacturing method and screw rod manufacturing method thereof - Google Patents

Abstract

The present invention relates to an aluminum car jack, a manufacturing method and a manufacturing method of a screw rod provided therein, in particular, the support frame for supporting the lower part of the vehicle body and the base frame installed on the ground and the lifting frame for linking them are die-cast It is manufactured by casting, and the screw rod that is rotatably coupled to the lifting frame is manufactured by cold forging, and the base frame, the lifting frame, and the supporting frame are made of nonferrous metal alloy, so that the process is simplified and the production is easy, and the productivity of the product is increased. There is a characteristic.

Elevating Frame, Support Frame, Screw Rod

Description

ALUMINUM JACK FOR VEHICLE, MANUFACTURING METHOD AND SCREW ROD MANUFACTURING METHOD THEREOF}

1 is a plan view showing a jack for a vehicle according to the prior art.

Figure 2 is a perspective view of a jack for aluminum vehicles according to the present invention.

Figure 3 is an exploded perspective view showing a jack for an aluminum car according to the present invention.

Figure 4a is a plan view of the lower frame according to the present invention.

FIG. 4B is a side cross-sectional view cut along line "AA" of FIG. 4A;

Figure 5a is a plan view and a side cross-sectional view of the upper frame according to the present invention.

FIG. 5B is a side sectional view taken along the line “BB” of FIG. 5A; FIG.

6a and 6b are side and cross-sectional views of the baseframe according to the invention.

Figure 7 is a block diagram showing a screw rod manufacturing method of an aluminum car jack according to the present invention.

<Code Description of Main Parts of Drawing>

100 ... base frame 200 ... lift frame

210 ... lower frame 220 ... upper frame

300 ... support frame 400 ... screw rod

410 Screw part 420 Head part

500,600 ... Combination Nut

The present invention relates to an aluminum car jack and a manufacturing method and a method for manufacturing a screw rod provided therein. As a supporting frame, a base frame and a lifting frame are manufactured by die casting, and a screw rod is manufactured by cold forging, a process is performed. The present invention relates to an aluminum car jack and a manufacturing method and a method for manufacturing a screw rod provided therein, which are simplified and are easy to manufacture and increase the productivity of a product.

In general, when a puncture or other abnormality of a car tire occurs, an automobile jack is used to lift a portion of the vehicle to a certain height on the road surface.

As shown in FIG. 1, a jack for a vehicle is provided with a base frame 10 to be in close contact with the ground, and the base frame 10 is paired with a pair of lower frames 21 having a predetermined length. The lifting frame 20 to which the upper frame 22 of the interconnection is connected is installed to be rotatable. At this time, the pair of upper frames 22 are pivotally connected by a support frame 30 for lifting and supporting a vehicle from the bottom, and the pair of lower frames 210 and the upper frame 22 meet each other. In the position, the screw rod 40 is installed through the coupling nuts 50 and 60 so that the lower frame 21 and the upper frame 22 rotate at a predetermined angle as the screw rod 40 rotates. The frame 30 is configured to be elevated.

The screw rod 40 is composed of a screw portion 41 formed by forging and forging a carbon steel strip, and a head portion 42 forging and drilling a carbon steel strip, and the screw portion 41 and the head portion 42 are mutually It is integrated by welding and phosphated. At this time, the head portion 42 is formed with a locking hole 43 is inserted into the handle so that the rotational force is transmitted to the screw rod (40).

However, in order to form a conventional screw rod as described above, there is a problem in that the productivity of the product decreases with a delay in processing time by going through a multi-step process such as forging, rolling, pressing, welding, and phosphate coating.

In addition, the jack for the vehicle is configured as described above is composed of a steel material for each component to maintain a certain strength, in order to mold each of the components to press the punched steel plate through the sequential mold, There was a problem that a separate process such as painting the appearance of the molded workpiece should be added.

In addition, the car jack is loaded on the trunk of the car when the car is being driven for the replacement of tires or repair of the lower part of the body. As the components of the aluminum car jack are made of steel, the fuel consumption of the car is reduced due to the weight. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art described above, and to reduce the process and processing time for manufacturing an aluminum car jack, and to reduce the weight of the parts produced, an aluminum car jack and a screw rod provided therewith. It is to provide a manufacturing method.

In order to achieve the above object, the present invention provides a jack for an automobile positioned on the lower part of the vehicle body to lift the vehicle body, the support frame for supporting the lower portion of the vehicle body, the base frame is installed on the ground, between the base frame and the support frame And a screw rod having a lifting hole linked to the lifting frame, and a locking hole rotatably coupled to the lifting frame so that the lifting frame is lifted and a handle fixed to one end thereof. The base frame, the lifting frame, and the support frame are non-ferrous metal alloys. Characterized in that consists of.

In this case, the non-ferrous metal alloy is preferably an aluminum alloy, the screw rod is a screw portion is rotated while the outer circumferential surface of the workpiece formed by cold forging to the rolling die and the thread is formed, and press punching at one end of the screw portion It may be composed of a head portion is formed by the engaging hole. In addition, the lifting frame is a pair of lower frames whose one end is pivotally connected to the base frame, and a pair of upper frames whose one end is pivotally connected to the other end of the lower frame and the other end is hinged to the support frame. It is preferable that a plurality of reinforcing ribs extending in the width direction are installed on the inner surface of the lifting frame in the longitudinal direction.

In addition, the one end of the upper frame and the other end of the lower frame it is preferable that the rounding portion drawn inwards is formed in a semi-circular shape, the other end of the pair of upper frames and one end of the pair of lower frames Preferably, the catching arm portion and the catching portion corresponding to the catching arm portion are alternately formed, and the protruding jaw protruding upward in the base frame is preferably extended in the longitudinal direction.

The present invention provides a method for manufacturing a jack screw rod for an automobile comprising a head and a screw, the cold forging step of forging a metal alloy material of a predetermined size in the shape of a screw rod, and the thread formed workpiece formed by cold forging operation It is characterized in that it comprises a rolling step for processing the screw is formed on the workpiece by rotating while pressing the rolling die, and a press working step for punching the head of the workpiece with a press.

The present invention comprises the steps of manufacturing the base frame, the lifting frame and the support frame through a die-casting process of pressing the molten non-ferrous metal in the mold at a high temperature for a short time, and the jack screw rod manufactured according to the above-described manufacturing method, and the die casting process It characterized in that it comprises a step of assembling the base frame, the lifting frame and the support frame manufactured through.

At this time, the step of manufacturing the base frame, the lifting frame, and the support frame is to produce a base frame protruding jaw is formed along the central longitudinal direction using a die casting process, the coupling holes are formed at both ends by using a die casting process It is preferable to manufacture a lifting frame having a locking arm portion and a locking portion at one end, and to manufacture a support frame for supporting a lower portion of the vehicle body by using a die casting process. In addition, it is preferable that a plurality of reinforcing ribs extending in the width direction are formed on the inner surface of the elevating frame spaced apart in the longitudinal direction.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a view showing a perspective view and an exploded perspective view of an aluminum car jack according to the present invention, Figure 4a to 5b is a view showing a plan view and a side cross-sectional view of the lower frame and the upper frame of the aluminum car jack according to the invention. 6A and 6B are side views and cross-sectional views of the base frame of the jack for aluminum cars according to the present invention.

As shown in Figure 2 to 6b, the present invention is the base frame 100, the support frame 300 for supporting the lower portion of the vehicle body, and the support frame 300 and the base frame 100 to interconnect Lifting frame 200, and the screw rod 400 is screwed to the lifting frame 200 to lift the support frame 300, the base frame 100, the support frame 300 and the lifting frame (200 consists of a nonferrous metal alloy.

Specifically, the base frame 100 is intended to be supported by the entire car jack by the ground, in close contact with the ground, the load of the vehicle body generated when lifting or lowering a part of the vehicle body by the lifting frame 200 is ground And is supported from.

In particular, a protruding jaw 120 protruding upward in the longitudinal direction is formed on the inner bottom of the base frame 100 in a longitudinal direction, and the reinforcing frame 130 protrudes upward in the edge of the base frame 100. do. In addition, the connection hole 110 is formed on the sidewall of the base frame 100 so that the lifting frame 200 which will be described later through the connection hole 110 is hinged to the base frame 100.

The lifting frame 200 is located between the support frame 300 and the base frame 100 to connect them to each other, the coupling hole for the link connection between each component at the end of the lifting frame 200 ( 204 is formed, and a plurality of reinforcing ribs 205 extending in the width direction are provided on the inner surface of the lifting frame 200 in the longitudinal direction.

For example, the elevating frame 200 is composed of a pair of upper frames 220 that are linked to the support frame 300 and a pair of lower frames 210 that are linked to the base frame 100. At this time, one end of the upper frame 220 is hinged to the support frame 300 through the coupling bolt and the other end of the coupling nut 500 of the screw rod 400, which will be described later, (( 600 is hinged to the lower frame 210 through. In addition, one end of the lower frame 210 is hinged to the base frame 100 through a coupling bolt, and the other end of the lower frame 210 is a coupling nut 500 of the screw rod 400, which will be described later, ( The hinge is connected to the upper frame 220 through the 600. The other ends of the upper and lower frames 220 and 210 which are hinged to each other are formed with a rounding part 203 which is drawn in a semicircular shape to the inside.

In addition, one end of the upper and lower frames 220 and 210 which are hinged to the support frame 300 and the base frame 100, respectively, and the semicircular engaging arm portion 201 which is drawn inward and outward. The semi-circular hook portion 202 protruding is alternately connected.

That is, when one end of the one side / the other upper frame 220, the engaging arm 201 and the hooking portion 202 is formed opposite to the rotation axis of the support frame 300, the upper frame 220 is When rotated, one end of the upper frame 220 disposed opposite to one side and the other side through the rotation by the engagement of the catching arm portion 201 and the other catching portion 202 is rotated. In addition, when one end of the one side / the other lower frame 210, the engaging arm 201 and the hooking portion 202 is formed opposite to the rotation axis of the base frame 100, respectively, the lower frame 210 is When rotated, one end of the lower frame 210 disposed opposite to one side and the other side through the rotation by the engagement of the one side locking arm portion 201 and the other side hook portion 202 is rotated.

Accordingly, the coupling between the pair of upper frames 220 hinged to the support frame 300 and the pair of lower frames 210 hinged to the base frame 100 are closely coupled to each other. Lifting of the lifting frame 200 by it can be made smoothly.

The other end of the upper frame 220 and the other end of the lower frame 210 are connected to each other through the coupling nut 500, 600 of the screw rod 400, in this case, the screw rod 400 The screw portion 410 is coupled to the pair of coupling nuts 500, 600, and the head portion 420 is formed integrally extending to the other end of the screw portion 410 is formed with a catching hole 430 It consists of. In particular, the outer circumferential surface of the screw portion 410 is formed through the cold forging operation is formed a screw thread that is rotated while being pressed on the rolling die, the locking hole 430 of the head 420 is formed by press punching.

In addition, a handle (not shown) is coupled to the locking hole 430 of the screw rod 400, and when the screw rod 400 is rotated by the handle, between the lower frame 210 and the upper frame 220. As the connection part approaches or moves away from each other, the support frame 300 is raised and lowered.

That is, one end of the screw rod 400 is coupled to the coupling nut 600 located at one end of the screw portion 410 of the pair of coupling nuts 500 and 600 so as to freely rotate, and the screw portion 410 The screw nut 400 is penetrated and coupled to the coupling nut 500 located at the other end of the coupling nut 500. Thus, when the screw rod 400 is rotated, the coupling nut 500 located at the other end of the screw portion 410 is moved in the longitudinal direction of the screw rod 400, and the movement of the coupling nut 500 is increased. Accordingly, the rotation angle between the lower frame 210 and the upper frame 220 is changed, so that the support frame 300 connected to the upper frame 220 may be lifted.

On the other hand, in the case of a conventional car jack, as a component of the car jack is made of steel, there is a problem that the fuel economy of the car is lowered due to the weight of the car jack, but in the case of the aluminum car jack according to the present invention, Base frame 100, the lifting frame 200, the support frame 300 and the like is made of aluminum alloy with excellent weight and strength, easy to manage, there is an advantage that the weight of the jack for the car is significantly reduced. In addition, as the aluminum alloy has excellent corrosion resistance, in the case of the aluminum car jack according to the present invention, a coating process added separately for corrosion resistance when manufacturing a frame through a conventional steel material can be omitted. There is an advantage that it is possible to reduce and equalize the product quality.

As the aluminum alloy material used in this embodiment, Al-Mg-Si-based alloy ADC12, which is known to have the best mechanical properties among general-purpose alloys, is used. However, the ADC12 aluminum alloy is only one embodiment of a specific aluminum alloy that can be used in the aluminum car jack according to the present embodiment, but is not limited thereto, and all aluminum alloys having light weight and excellent strength may be used. .

The aluminum car jack frame such as the base frame 100, the lifting frame 200, the support frame 300, and the like is produced through a die casting process suitable for a low melting point aluminum alloy. The die casting process is a method of casting by injecting molten metal into a mold having a high-precision surface at a high temperature for a short time, and in particular, pushing the molten metal into a die or a mold capable of forming a desired shape of the molten aluminum alloy. By extracting the car jack frame made of an aluminum alloy can be produced. This enables mass production of automotive jack components in a short time, and increases accuracy and process speed.

7 is a block diagram showing a method for manufacturing a jack screw rod for an aluminum vehicle according to the present invention.

As shown in FIG. 7, the screw rod 400 made of metal may be produced through a cold forging process and a rolling and pressing process.

For example, forging a metal material of a predetermined size into the shape of a screw rod 400 (S10), and after preparing a rolling die having a thread, it rotates while pressing the workpiece formed through the forging process on the rolling die and screwing the workpiece. 410 is formed (S20). When the thread 410 is formed, the head 420 and 420 of the workpiece are punched by a press to form a locking hole 430 to which the handle is coupled (S30). At this time, the forging operation of the step S10 is used forging cold.

Accordingly, the manufacturing method of the jack screw rod 400 for aluminum automobile according to the present invention can be omitted because the process such as welding work and phosphate coating work required for molding the conventional steel screw rod 400, processing time There is an advantage that a significant shortening of.

On the other hand, the screw rod 400 of the metal material produced in this way is assembled with the jack parts for aluminum automobile produced through the die casting process.

That is, the manufacturing method of the jack for aluminum cars according to the present invention, first, the base frame 100, the lifting frame 200 and the support frame described above through a die casting process of pressing and casting a non-ferrous metal melted in a mold at a high temperature for a short time. 300 is prepared. Here, the die casting process is a casting method of injecting molten metal into a precise mold at high pressure and high speed and maintaining a pressure during solidification to obtain a casting, and a detailed description thereof will be omitted.

In the present embodiment, the die-casting operation is performed using the aluminum alloy as a material. In this case, it is preferable that a cold chamber type die casting apparatus is used. This is because a relatively high melting temperature metal such as aluminum alloy is injected into the mold in a state where the temperature is not so high and the fluidity is low, and the forging effect can be expected as it is continuously pressed.

Here, the mold used in the die casting process should be formed to correspond to the shape of the jack parts for aluminum automobiles according to the present invention. That is, the mold for the base frame 100 is configured such that the base frame 100 is formed in the protruding jaw 120 in the central longitudinal direction, the mold for the lifting frame 200 is coupled to both ends ( 204 is formed, and the locking arm 201 and the hooking portion 202 are formed at one end, and the upper and lower frames 220 and 210 in which the reinforcing ribs 205 are spaced in the longitudinal direction should be formed.

As such, the aluminum jack jack according to the present invention is manufactured by the support frame 300, the base frame 100 and the lifting frame 200 through a die casting method, the casting surface is clean and can reduce the finishing work As the structure is dense, the strength is high, the casting of thin castings is possible, and the weight of the product can be reduced. Since the casting is fast, the unit price can be reduced by mass production.

Each part manufactured through the die casting process, that is, the base frame 100, the lifting frame 200, and the supporting frame 300 are assembled with the above-described screw rod 400. Here, the fastening between the screw rod 400 and the coupling nut 500, 600 is performed by a caulking operation, the caulking operation is a construction method of a commercially available fastening method used in pressure vessels, etc., a detailed description thereof will be omitted. .

As described above, since the base frame 100, the lifting frame 200, the support frame 300, etc. constituting the jack for aluminum cars is made of an aluminum alloy material, the present invention is to reduce the weight of the jack for aluminum cars Through this, the fuel efficiency of the automobile can be improved.

In addition, the present invention by processing the frame, such as the base frame 100, the lifting frame 200, the support frame 300, constituting the jack for aluminum cars by the die casting processing method, the base frame 100 made of conventional steel In addition, the productivity can be improved as compared to the steel plate press processing method for manufacturing the frame, such as the lifting frame 200, the support frame 300, and the like.

While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that the invention can be variously modified and varied without departing from the spirit or scope of the invention as provided by the following claims. It will be obvious to those of ordinary skill.

As described above, according to the present invention, by configuring the frame constituting the jack for aluminum cars made of an aluminum alloy material, there is an advantage that the quality of the product is improved to improve the reliability of the consumer.

In addition, the present invention has an economical effect that can be improved fuel economy through the weight reduction of the jack for the vehicle is required to be loaded on the vehicle when replacing the tire of the vehicle or inspection and repair of the lower body.

In addition, the present invention can be automated assembly of the elevating frame and screw rods used in the jack for automobiles to reduce labor costs, there is an effect that the work efficiency is maximized.

Claims (11)

In the jack for automobiles located in the lower part of the vehicle body to lift the vehicle body, A support frame for supporting the lower part of the vehicle body, A base frame installed on the ground, An elevating frame linked between the base frame and the supporting frame; It includes a screw rod is rotatably coupled to the lifting frame so that the lifting frame is lifted and the engaging hole is fixed to one end of the lifting frame, The base frame, the lifting frame, the support frame is made of an aluminum alloy, The lifting frame includes a pair of lower frames linked to the base frame, and a pair of upper frames linked to the support frame. An aluminum jack for an automobile, characterized in that a plurality of reinforcing ribs extending in the width direction on the inner side of the elevating frame are installed in the longitudinal direction. delete The method according to claim 1, The screw rod is A threaded portion in which the outer circumferential surface of the workpiece formed by cold forging is rotated while pressing the rolling die to form a thread; Aluminum jack for a vehicle, characterized in that consisting of a head portion is formed in the end of the screw by the punching punching press. delete The method according to claim 1, At the end of the lifting frame The aluminum jack for automobiles, characterized in that the rounded portion drawn inwards is formed in a semicircle shape. The method according to claim 1, At the end of the lifting frame The aluminum jack for automobile, characterized in that the locking arm portion and the locking portion corresponding to the locking arm portion are formed alternately. The method according to claim 1, The base frame The aluminum jack for automobiles, characterized in that the protruding jaw protruding upwardly is formed extending in the longitudinal direction. delete Manufacturing a base frame, a lifting frame, and a support frame through a die casting process of injecting and casting molten nonferrous metal into a mold at a high temperature for a short time; Cold forging a metal alloy material of a certain size in the shape of a screw rod, and rotating the workpiece formed by cold forging into a threaded rolling die to form a thread in the workpiece, and then punching the head of the workpiece with a press. Jack screw rod manufactured through, the aluminum frame manufacturing method for a vehicle comprising the step of mutually assembling the base frame, the lifting frame and the support frame manufactured through a die casting process. The method according to claim 9, Manufacturing the base frame, the lifting frame and the support frame By using a die casting process to produce a base frame protruding jaw extending along the central longitudinal direction, By using a die casting process to produce a lifting frame in which a coupling hole is formed at both ends and a catching arm portion and a catching portion are formed at one end, An aluminum jack manufacturing method for a vehicle, comprising using a die casting process to manufacture a support frame for supporting a lower portion of a vehicle body. The method according to claim 10,  Inner side of the lifting frame Reinforcing ribs extending in the width direction is formed in the aluminum jack for a vehicle, characterized in that formed in plurality in the longitudinal direction.

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