2-post vehicle maintenance lift

Abstract

The present invention relates to a two-post vehicle maintenance lift characterized by comprising a support bracket that moves up and down by means of a cylinder, a support column spaced apart in the horizontal direction, and two lifting arms rotatably provided on both sides in the width direction of each support column; and further comprising a reinforcing member installed on both sides in the width direction and on both sides in the horizontal direction of the lifting arms with the support column in between.

Description

Technology Field

[0001] The present invention relates to a two-post vehicle maintenance lift, and more specifically, to a two-post vehicle maintenance lift with improved safety. Background Technology

[0002] Vehicle repair shops are equipped with vehicle repair lifts that allow the vehicle to be lifted to a certain height from the ground for work when replacing tires, changing oil, or repairing parts, and two-post vehicle repair lifts with a simple structure are used for repairing relatively lightweight passenger cars.

[0003] Generally, a two-post vehicle maintenance lift is a structure in which a lifting arm is mounted on two posts installed vertically on the ground and moves up and down using a cylinder installed inside the posts to lift the vehicle, and since installation costs can be reduced, it is mainly installed in small repair shops.

[0004] Conventional two-post vehicle maintenance lifts have a simple structure, but the rigidity of the arms is insufficient, so they cannot adequately cope with deformation caused by the weight of the lifted vehicle, or deformation occurs in the arms due to the weight of the vehicle, shortening their lifespan, or the rigidity of the arms must be increased more than necessary. Additionally, the structure is complex because the arms rotate, and since the arms rotate, the angle is not constant depending on the vehicle and the supporting part, which causes inconvenience in use. Prior art literature

[0005] Republic of Korea Publication No. 10-2018-0134058 Published Patent Application Republic of Korea Registration No. 10-1763879 Registered Patent Application The problem to be solved

[0006] The present invention is proposed to solve the problems of the conventional technology described above, and aims to provide a two-post vehicle maintenance lift that improves work safety by installing a reinforcing member to reinforce the rigidity of the arm so that the arm does not sag downwards under the weight of the vehicle, and by preventing the arm from rotating outward and detaching from the vehicle through the reinforcing member while having a simple structure. means of solving the problem

[0007] For the above purposes, the present invention provides a two-post vehicle maintenance lift characterized by comprising a support bracket that moves up and down by means of a cylinder, a support column spaced apart in the horizontal direction, and two lifting arms rotatably provided on both sides in the width direction of each support column; and further comprising a reinforcing member installed on both sides in the width direction and on both sides in the horizontal direction of the lifting arms with the support column in between.

[0008] In the above, the reinforcing member comprises a reinforcing member bracket that is coupled to the lower part of each lifting arm and forms a passage, a reinforcing rod that extends in the horizontal direction with both sides in the horizontal direction inserted into the passage formed by the reinforcing member bracket, and a fastening member that is fastened to the reinforcing rod;

[0009] The above reinforcing rod is formed at one end with a size that prevents it from passing through a passage and has a reinforcing catch that engages with the passage, is inserted into both horizontal passages, and one end is caught on the outside of one of the two horizontal passages by the reinforcing catch; the above fastening member is fastened to the other end of the reinforcing rod that passes through the other passage where the reinforcing catch is not caught, and is positioned on the outside of the other passage.

[0010] In the above, the width of the passage measured in the longitudinal direction of the lifting arm is greater than the diameter of the reinforcing rod, and the projected width of the passage measured in the width direction at the maximum angle at which the lifting arm can rotate inward in the transverse direction is equal to the diameter of the reinforcing rod.

[0011] In the above, it further includes an inner fastening member coupled to a reinforcing rod, wherein the inner fastening member is provided in an arc shape with an arc angle greater than 180°, into which a reinforcing rod is inserted from the inner side of both reinforcing brackets, and is characterized by being made of rubber material and coupled to the reinforcing rod, and having a size that is caught on the bracket coupling part from the inner side.

[0012] In the above, one lifting arm is provided on each support; the lifting arm comprises a first arm which is a hollow body that is coupled to a support bracket and extends in the width direction and is open on both sides in the width direction, slide arms provided by being slidably inserted in the width direction on both sides of the first arm, and a vehicle support member provided to be slidably movable in the horizontal direction on each slide arm;

[0013] The above reinforcing member is characterized by being installed on the first arm or slide arm on both sides in the width direction with the support bracket in between.

[0014] In the above, the vehicle support member comprises a support rod inserted so as to be slidably moved in the horizontal direction into a slide hole formed penetrating the slide arm in the horizontal direction, a support catch portion provided at the outer end of the support rod and engaging with the slide hole, and a support main body portion provided on the inner side of the support rod;

[0015] The upper center of the above-mentioned base body is formed with a concavely curved concave portion, and flat portions are provided on both sides in the horizontal direction of the concave portion. Effects of the invention

[0016] In the two-post vehicle maintenance lift according to the present invention, reinforcing members are installed on both horizontal lifting arms, thereby reinforcing the rigidity so that the lifting arms do not sag downwards under the weight of the vehicle, and the reinforcing members prevent the lifting arms from rotating outward and detaching from the vehicle, thereby improving work safety. Brief explanation of the drawing

[0017] FIG. 1 is a front view illustrating a two-post vehicle maintenance lift according to the present invention, and FIG. 2 is a plan view illustrating a two-post vehicle maintenance lift according to the present invention, and FIG. 3 is a schematic partial plan view illustrated to explain the installation of the reinforcement part, and FIG. 4 is a plan view illustrating another example of a two-post vehicle maintenance lift according to the present invention, and Figure 5 is a schematic cross-sectional view along line AA of Figure 4. Specific details for implementing the invention

[0018] All technical and scientific terms used in the description of the present invention, unless otherwise defined, have the meaning generally understood by those skilled in the art to which the present disclosure pertains. All terms used in the present disclosure are selected for the purpose of further clarifying the present disclosure and are not selected to limit the scope of the rights under the present disclosure.

[0019] Expressions such as "comprising," "having," "having," etc. used in the description of the present invention should be understood as open-ended terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing such expressions.

[0020] Singular expressions used in the description of the present invention may include the meaning of the plural form unless otherwise stated, and this applies likewise to singular expressions described in the claims.

[0021] Expressions such as "first," "second," etc., used in the description of the present invention are used to distinguish multiple components from one another and do not limit the order or importance of said components.

[0022] Where in the description of the present invention it is mentioned that a component is "connected" or "combined" to another component, it should be understood that the component can be directly connected or combined to the other component, or can be connected or combined through a new or different component.

[0023] The two-post vehicle maintenance lift of the present invention will be described in detail below with reference to the attached drawings.

[0024] FIG. 1 is a front view illustrating a two-post vehicle maintenance lift according to the present invention, FIG. 2 is a plan view illustrating a two-post vehicle maintenance lift according to the present invention, FIG. 3 is a schematic partial plan view illustrating the installation of a reinforcing member, FIG. 4 is a plan view illustrating another example of a two-post vehicle maintenance lift according to the present invention, and FIG. 5 is a schematic cross-sectional view along line AA of FIG. 4.

[0026] For the convenience of explanation, in Fig. 2, the vertical direction is described as the width direction and the horizontal direction as the horizontal direction.

[0028] As illustrated in FIGS. 1 and 2, a two-post vehicle maintenance lift (100) according to the present invention comprises a support (110), a lifting arm (120), and a reinforcing member (130).

[0029] The above-mentioned support posts (110) are extended in the vertical direction and are spaced apart in the horizontal direction and arranged side by side facing each other. A plate-shaped installation bracket (111) is provided at the lower part of the support posts (110). The size of the installation bracket (111) is larger than the cross-sectional area of ​​the support posts (110), and the support posts (110) are fixedly installed on the ground via the installation bracket (111).

[0030] The above-mentioned support (110) is a hollow body and has an inwardly opening on the inner side facing in the horizontal direction, and an elongated hole extending in the vertical direction is formed. A cylinder is installed on the inner lower part of the above-mentioned support (110) so that the cylinder rod is raised.

[0031] A support bracket (113) is provided on the inner side of the support (110) in the horizontal direction. The support bracket (113) is provided to be movable in the vertical direction by means of a cylinder installed within the support (110). The support bracket (113) is connected to a cylinder rod by passing through the elongated hole of the support (110) and is provided to be movable up and down along the elongated hole.

[0032] The above support bracket (113) has an opening formed on the inner side in the horizontal direction, extending in the width direction and the inner side in the horizontal direction, and is provided with flanges aligned in the vertical direction. One side of a lifting arm (120) is connected between the vertically aligned flanges and is rotatably provided.

[0033] Two lifting arms (120) are provided on each support (110) spaced apart in the horizontal direction. The lifting arms (120) extend to both sides in the width direction centered on the support (110). The lifting arms (120) are provided on both sides in the width direction centered on the support bracket (113), and the inner side of the lifting arm (120) in the width direction is rotatably connected to the support bracket (113) by a hinge (115). The lifting arms (120) are provided to rotatably on both sides in the width direction on each support (110).

[0034] In the present invention, the lifting arm (120) is coupled to the support bracket (113) and is raised by a cylinder installed within the support (110). Since the cylinder that raises the lifting arm (120) is a known technology, a description thereof is omitted.

[0035] The above lifting arm (120) comprises a first rotating arm (121), a slide arm (123), and a vehicle support member (125).

[0036] The first rotating arm (121) is a hollow body and is provided in the form of a rod having length. The first rotating arm (121) has at least an outer end in the width direction open. The first rotating arm (121) is provided as a hollow body with a square cross-section. The first rotating arm (121) extends from the inner side in the horizontal direction of the support (110) to the outer side in the width direction and is rotatably installed on the support bracket (113) by a hinge (115). The first rotating arm (121) is inserted between flanges provided parallel in the vertical direction from the inner side in the horizontal direction of the support bracket (113) and is rotatably installed by a hinge (115).

[0037] The lifting arm (120) is configured such that the first rotating arm (121) is rotatably installed on the support bracket (113) by a hinge (115) so as to be rotatable in the direction of arrow "A" in FIG. 2.

[0038] The slide arm (123) is provided in the form of a rod extending in the extension direction of the first rotating arm (121). The slide arm (123) is provided as a hollow body with a square cross-section. The cross-sectional area of ​​the slide arm (123) is provided to be smaller than the cross-sectional area of ​​the first rotating arm (121). The slide arm (123) is slidably inserted into the first rotating arm (121) at the outer side in the width direction of the first rotating arm (121).

[0039] If the cross-sectional area of ​​the slide arm (123) is larger than the cross-sectional area of ​​the first rotating arm (121), the outer side in the width direction of the first rotating arm (121) may be slidably inserted into the slide arm (123).

[0040] The vehicle support member (125) is provided at the end of the slide arm (123). The vehicle support member (125) is provided on the upper part of the end of the slide arm (123). The vehicle support member (125) is provided in a disc shape, and a plurality of protrusions may be formed on the upper surface. The vehicle support member (125) is located at the bottom of the vehicle to support the vehicle body and lift it.

[0041] The reinforcing member (130) is provided on both sides in the width direction with the support column (110) in between. The reinforcing member (130) is installed on the lifting arms (120) on both sides in the width direction with the support column (110) in between. The reinforcing member (130) is installed at the bottom of the lifting arm (120). The reinforcing member (130) is installed at the bottom of the first rotating arm (121). If the cross-sectional area of ​​the slide arm (123) is larger than the cross-sectional area of ​​the first rotating arm (121), the reinforcing member (130) may be installed at the bottom of the slide arm (123).

[0042] The above reinforcing member (130) comprises a reinforcing member bracket (131), a reinforcing rod (133), and a fastening member (135).

[0043] The reinforcing bracket (131) is provided by being coupled to the lower part of each lifting arm (120) and forms a passage (132) that penetrates in the width direction of the lifting arm (120). The reinforcing bracket (131) may be provided by being coupled to the lower part of the first rotating arm (121) as shown in FIG. 2.

[0044] As shown in FIG. 3, the reinforcing bracket (131) is composed of a bracket connecting part (1311) and a bracket bottom part (1313).

[0045] The above bracket connecting portion (1311) is provided in a plate shape and is spaced apart in the longitudinal direction of the lifting arm (120) and provided in parallel facing each other. The two bracket connecting portions (1311) provided facing each other are connected to the lower part of the lifting arm (120) and are provided to extend downward. The upper end of the bracket connecting portion (1311) is welded to the lower part of the lifting arm (120).

[0046] The bracket bottom portion (1313) is provided at the bottom of the bracket connecting portions (1311) on both sides. The bracket bottom portion (1313) is provided in a plate shape extending in the longitudinal direction of the lifting arm (120). The bracket bottom portion (1313) is provided with both ends connected to the bottom of the bracket connecting portions (1311) on both sides. The bracket bottom portion (1313) has both ends welded to the bottom of the bracket connecting portions (1311).

[0047] The above reinforcing bracket (131) can be manufactured by bending a metal plate and can be provided by welding both ends to the lower part of the lifting arm (120).

[0048] The passage (132) is formed between the bracket joint portion (1311) and between the bracket bottom portion (1313) and the lifting arm (120). The reinforcing bracket (131) may be made of a hollow body with a through hole formed therein, and the hole of the reinforcing bracket (131) may become the passage (132).

[0049] The reinforcing rod (133) is provided in the form of a rod extending in the horizontal direction. Both sides of the reinforcing rod (133) in the horizontal direction are inserted into the passage (132) formed by the reinforcing bracket (131) and extend in the horizontal direction. The reinforcing rods (133), which are spaced apart on both sides in the width direction with respect to the support column (110), are provided parallel to each other.

[0050] The reinforcing rod (133) is formed at one end with a size that prevents it from passing through the passage (132) and is provided with a reinforcing catch (1331) that catches on the passage (132). The reinforcing rod (133) is inserted into both horizontal passages (132) and is provided with one end caught on the outside of one of the horizontal passages (132) by the reinforcing catch (1331).

[0051] The above fastening member (135) is provided in the form of a ring. The fastening member (135) is fastened to the other side of the reinforcing rod (133) that passes through another passage (132) where the reinforcing catch (1331) is not caught, and is located on the outside of the other passage (132). A male screw is formed on the reinforcing rod (133), and the fastening member (135) is provided by being screw-fastened to the reinforcing rod (133) with a female screw.

[0052] As illustrated in FIG. 3, the width (W1) of the passage (132) measured in the longitudinal direction of the lifting arm (120) is greater than the diameter (D) of the reinforcing rod (133), and the projected width (W2) of the passage (132) measured in the width direction at the maximum angle (θ) at which the lifting arm (120) can rotate inward in the transverse direction is equal to the diameter (D) of the reinforcing rod (133).

[0053] The vertical height of the passage (132) is formed to be slightly larger than the diameter (D) of the reinforcing rod (133). For example, the vertical height of the passage (132) can be formed to be larger in the range of 0.5 to 2.0 mm than the diameter (D) of the reinforcing rod (133).

[0054] In the two-post vehicle maintenance lift (100) according to the present invention, the lifting arm (120) supports the vehicle by rotating inwardly with respect to the width direction as shown in FIG. 2. The rotation angle (θ) of the lifting arm (120) can be limited, for example, to a maximum of 40 degrees. When the lifting arm (120) rotates, the projected width (W2) of the passage (132) measured in the width direction decreases, and when the reinforcing rod (133) comes into contact with the inner side of the passage (132) as shown by points A and B in FIG. 3, the lifting arm (120) can no longer rotate.

[0055] Accordingly, the lifting arm (120) is reinforced with rigidity by the reinforcing rod (133), and the reinforcing rod (133) contacts the inside of the passage (132), thereby preventing the lifting arm (120) from rotating excessively, so that the lifting arm (120) can be prevented from working.

[0056] The reinforcing member (130) may further include an inner fastening member (137) that is coupled to the reinforcing rod (133).

[0057] The inner fastening member (137) is provided in the shape of an arc with an arc angle greater than 180°. The inner fastening member (137) is provided by inserting a reinforcing rod (133) into the inner side of the reinforcing bracket (131) on both sides in the horizontal direction. The inner fastening member (137) is connected to the reinforcing rod (133) and is sized to be caught on the reinforcing bracket (131) in the inner side in the horizontal direction. The diameter of the circle corresponding to the outer curved surface of the inner fastening member (137) is provided to be larger than the vertical height of the passage (132).

[0058] The inner fastening member (137) is made of rubber material and has an arc-shaped opening to insert a reinforcing rod (133). The inner surface of the inner fastening member (137) may be coated with a material having a high coefficient of friction (e.g., polyurethane). The inner fastening member (137) may be made of an elastic synthetic resin material, and the inner surface of the inner fastening member (137) may be provided with a coating of a material having a high coefficient of friction (e.g., polyurethane).

[0059] The above reinforcing member (130) is further provided with an inner fastening member (137) made of a rubber material or a material having a high friction coefficient on the inner surface of the inner fastening member (137) in addition to the above fastening member (135), so that it is caught on the inner side of the passage (132) located on both sides in the horizontal direction, thereby preventing rotation of the lifting arm (120), and accordingly, the rigidity of the lifting arm (120) is further improved.

[0060] As described above, in the two-post vehicle maintenance lift (100) according to the present invention, reinforcing members (130) are installed on both horizontal lifting arms (120), thereby reinforcing the rigidity of the lifting arms (120) so that the lifting arms (120) do not sag downwards due to the weight (F) of the vehicle, and the lifting arms (120) are prevented from rotating outward and detaching from the vehicle by the reinforcing members (130), thereby improving work safety.

[0062] FIGS. 4 and FIGS. 5 illustrate other examples of a two-post vehicle maintenance lift (100) according to the present invention.

[0063] As shown in FIG. 4, one lifting arm (120) is provided on each support (110).

[0064] The above lifting arm (120) comprises a first arm (122), a slide arm (123), and a vehicle support member (126).

[0065] The first arm (122) is coupled to the support bracket (113) of the support (110), extends in the width direction, and is provided as a hollow body with a square cross-section. The first arm (122) is open on both sides in the width direction.

[0066] The slide arm (123) is provided on each side of the first arm (122) in the width direction. The slide arm (123) has a rectangular cross-section. The slide arm (123) is provided by being inserted so as to be slidable in the width direction on each side of the first arm (122). A slide hole is formed at the end of the slide arm (123) and penetrates in the horizontal direction.

[0067] The vehicle support member (126) is provided to be slidably movable in the horizontal direction on each slide arm (123) at the end of each slide arm (123). The vehicle support member (126) comprises a support rod (1261), a support catch member (1263), and a support body member (1265).

[0068] The support rod (1261) is provided in the form of a rod extending in the horizontal direction. It is inserted so as to be slidably moved in the horizontal direction into a slide hole formed through the slide arm (123) in the horizontal direction. The support rod (1261) is provided extending in the horizontal direction through the slide hole.

[0069] The support catch portion (1263) is provided at the outer end of the support rod (1261) and is configured to catch on the slide hole. The support rod (1261) of the vehicle support portion (126) is inserted from the outer side in the horizontal direction to the inner side of the slide arm (123), and the support catch portion (1263) is provided on the outer side of the slide arm (123) to catch on the slide hole.

[0070] As illustrated in FIG. 5, the support body (1265) is provided on the inner side in the horizontal direction of the support rod (1261). The support body (1265) consists of two support bodies (1267) spaced apart in the width direction and provided side by side. A concavely curved concave portion (1268) is formed in the upper center of the support body (1265), and flat portions (1266) are provided on both sides in the width direction centered on the concave portion (1268). A cushioning portion (1269) made of a material such as rubber is further provided on the upper part of the support body (1265) and can be provided by stacking it on top of the support body (1267).

[0071] The vehicle support member (126) can lift a vehicle tire by placing it on the concave portion (1268) and can lift a vehicle body by placing it on the flat portion (1266). Since the vehicle support member (126) is equipped with a concave portion (1268) and a flat portion (1266), the vehicle body and tire can be selectively supported and lifted, and since the tire can be supported and lifted, the possibility of damage to the vehicle body is reduced.

[0072] The above reinforcing member (130) is installed at the lower part of the lifting arm (120) with the support bracket (113) in between. The reinforcing member (130) is installed on the first arm (122) or slide arm (123) on both sides in the width direction and on both sides in the horizontal direction.

[0073] The above reinforcing member (130) comprises a reinforcing bracket (134), a reinforcing rod (133), and a fastening member (135).

[0074] The reinforcing bracket (134) is provided at the lower part of the first arm (122) or the slide arm (123). The reinforcing bracket (134) has a reinforcing hole formed therein that penetrates in the horizontal direction, into which a reinforcing rod (133) is inserted in the horizontal direction. The reinforcing hole is formed to a size such that the reinforcing rod (133) can be slidably inserted.

[0075] The reinforcing rod (133) is provided in the form of a rod extending in the horizontal direction. The reinforcing rod (133) may be provided in the form of a rod with a circular cross-section. The reinforcing rod (133) is extended in the horizontal direction by being inserted into reinforcing holes formed in the reinforcing bracket (134) on both sides in the horizontal direction. If the cross-section of the reinforcing rod (133) is circular, the cross-section of the reinforcing hole is also formed in a circular shape, and if the cross-section of the reinforcing rod (133) is polygonal, the cross-section of the reinforcing hole is also formed in a polygonal shape.

[0076] The reinforcing rod (133) is formed at one end with a size that prevents it from passing through the reinforcing hole, and is provided with a reinforcing catch (1331) that catches on the reinforcing hole. The cross-sectional area of ​​the reinforcing catch (1331) is provided to be larger than the cross-sectional area of ​​the reinforcing hole. The reinforcing rod (133) is slidably inserted into the reinforcing hole in the horizontal direction and inserted into the reinforcing holes on both sides in the horizontal direction, and one end is provided to catch on the outside of one of the reinforcing holes on both sides in the horizontal direction through the reinforcing catch (1331).

[0077] The above fastening member (135) is provided in the form of a ring. The fastening member (135) is fastened to the other side of the reinforcing rod (133) that passes through another reinforcing hole where the reinforcing catch (1331) is not caught, and is located on the outside of another reinforcing bracket (134). A male screw is formed on the reinforcing rod (133), and the fastening member (135) is provided by being screwed onto the reinforcing rod (133) with a female screw.

[0078] The reinforcing member (130) may further include an inner fastening member (137) that is coupled to the reinforcing rod (133).

[0079] The inner fastening member (137) is provided in the shape of an arc with an arc angle greater than 180°. The inner fastening member (137) is provided by inserting a reinforcing rod (133) into the inner side of the reinforcing brackets (134) on both sides in the horizontal direction. The inner fastening member (137) is connected to the reinforcing rod (133) and is sized to be caught on the reinforcing bracket (134) from the inside. The diameter of the circle corresponding to the outer curved surface of the inner fastening member (137) is provided to be larger than the inner diameter of the reinforcing bracket (134).

[0080] The inner fastening member (137) is made of rubber material and has an arc-shaped opening to insert a reinforcing rod (133). The inner fastening member (137) is made of rubber or an elastic synthetic resin material, and the inner surface of the inner fastening member (137) may be provided coated with a material having a high coefficient of friction (e.g., polyurethane).

[0081] As described above, another example of a two-post vehicle maintenance lift (100) according to the present invention is not a structure in which the lifting arm (120) rotates, so the rigidity can be greatly increased by providing a reinforcing part (130), and the structure is simple and easy to use. Explanation of the symbols

[0083] 100: 2-post vehicle maintenance lift 110: Support 120: Lifting arm 130: Reinforcement part

Claims

Claim 1 It includes a support bracket (113) that moves up and down by means of a cylinder, a support (110) spaced apart in the horizontal direction, and two lifting arms (120) rotatably provided on both sides in the width direction on each of the support (110); It further includes a reinforcing member (130) installed on both sides of the horizontal lifting arm (120) on both sides of the width direction with the support member (110) in between; the reinforcing member (130) is provided by being coupled to the lower part of each lifting arm (120) and includes a reinforcing member bracket (131) that forms a passage (132), a reinforcing rod (133) that extends in the horizontal direction and is inserted into the passage (132) formed by the reinforcing member bracket (131) on both sides of the horizontal direction, and a fastening member (135) that is fastened to the reinforcing rod (133); the reinforcing rod (133) has a reinforcing catch (1331) formed at one end so as not to pass through the passage (132) and catches on the passage (132), and is inserted into both horizontal passages (132) and one side is on the outside of one of the horizontal passages (132) with the reinforcing catch (1331). A two-post vehicle maintenance lift (100) characterized in that the above-mentioned fastening member (135) is fastened to the other side of the reinforcing rod (133) that passes through another passage (132) where the reinforcing hook portion (1331) is not hooked, and is located on the outside of the other passage (132). Claim 2 delete Claim 3 A two-post vehicle maintenance lift (100) according to claim 1, characterized in that the width (W1) of the passage (132) measured in the longitudinal direction of the lifting arm (120) is greater than the diameter (D) of the reinforcing rod (133), and the projected width (W2) of the passage (132) measured in the width direction at the maximum angle at which the lifting arm (120) can rotate inward in the transverse direction is equal to the diameter (D) of the reinforcing rod (133). Claim 4 A two-post vehicle maintenance lift (100) according to claim 1, further comprising an inner fastening member (137) coupled to the reinforcing rod (133), wherein the inner fastening member (137) is provided in an arc shape with an arc angle greater than 180°, into which the reinforcing rod (133) is inserted from the inner side of the two reinforcing brackets (131), and is made of a rubber material and coupled to the reinforcing rod (133) and is sized to be caught on the bracket coupling part (1311) from the inner side. Claim 5 In claim 1, the lifting arm (120) is provided one per support; the lifting arm (120) comprises a first arm (122) which is a hollow body that is connected to a support bracket (113) and extends in the width direction and is open on both sides in the width direction, a slide arm (123) which is slidably inserted in the width direction on both sides of the first arm (122), and a vehicle support member (126) which is slidably moved in the horizontal direction on each slide arm (123); and the reinforcing member (130) is installed on the first arm (122) or the slide arm (123) on both sides in the width direction with the support bracket (113) in between. This characterizes a two-post vehicle maintenance lift (100). Claim 6 In claim 5, the vehicle support member (126) comprises a support rod (1261) that is inserted horizontally so as to be slidably moved into a slide hole formed horizontally through a slide arm (123), a support catch member (1263) provided at the outer end of the support rod (1261) and caught on the slide hole, and a support body member (1265) provided on the inner side of the support rod (1261); wherein a concavely curved concave portion (1268) is formed in the upper center of the support body member (1265), and flat portions (1266) are provided on both sides in the horizontal direction of the concave portion (1268), characterized in that a two-post vehicle maintenance lift (100).

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