Jacking head replacing device of automobile jack

Abstract

The utility model belongs to the technical field of automobile jacks, and particularly relates to an ejector head replacing device of an automobile jack, which comprises a base, an ejector head is movably arranged on the base, the ejector head comprises a connecting seat detachably connected with the base and an ejector head main body, a support plate is arranged on the ejector head main body, and a mounting hole is arranged at the upper end of the connecting seat. A positioning hole is formed in the bottom of the mounting hole, a mounting part and a positioning part are arranged on the plug main body, the mounting part is matched with the mounting hole, and the positioning part penetrates through the mounting hole and is matched with the positioning hole; a mounting groove is formed in the side wall of the mounting part, a limiting piece is movably arranged in the mounting groove, and the outer side of the limiting piece penetrates out of the mounting groove and makes contact with the side wall of the mounting hole; according to the plug replacing device of the automobile jack, the plug body and the connecting base are controlled to move relatively, the limiting piece deflects due to friction of the side wall of the mounting hole, and therefore continuous movement of the connecting base and the plug body is limited, and the plug replacing device of the automobile jack is simple in structure and convenient to use by a user.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile jacks, and particularly relates to a head replacement device for automobile jacks. Background Art

[0002] The car jack is a common car maintenance tool. Its main function is to lift and support the vehicle during repair.

[0003] Since the lifting heights required in the repair process of different vehicles vary greatly, there are jacks with various lifting heights on the market. Users need to purchase jacks of multiple specifications to complete different car repairs. Therefore, some jacks on the market can be adjusted in multiple levels, such as a vertical jack disclosed in Chinese utility model patent CN201922251498.X, which includes an outer sleeve cavity and an oil cylinder cavity, and the outer sleeve cavity and the oil cylinder cavity can be connected through an external oil circuit to realize oil return; it also includes a piston rod, a piston middle rod and a piston rod, which are nested in sequence and all have piston heads; the process in which the piston rod compresses the piston rod cavity one is the first stroke of the jack; the process in which the piston middle rod compresses the piston rod cavity two constitutes the second stroke of the jack; the process in which the piston rod compresses the cylinder cavity constitutes the third stroke of the jack; wherein the piston head on the piston middle rod has an oil drain hole one, the piston head on the piston rod has an oil drain hole two, and an oil drain hole three is provided in the connecting oil circuit between the oil cylinder cavity and the outer sleeve cavity, so that the jack has the same descending speed in the first stroke, the second stroke and the third stroke of the jack in the load state. It has multiple strokes, and each stroke has the same descending speed, which effectively ensures the working stability of the jack.

[0004] Although the above structure can make the jack applicable to different models through the multi-stage structure and improve the versatility of the hydraulic jack, the structure requires the user to spend a long time to control the extension and retraction of the jack, which is inconvenient for the user. Summary of the invention

[0005] In order to overcome the defects in the prior art, the purpose of the utility model is to provide a head replacement device for a car jack which has a simple structure and is convenient for users to use.

[0006] The purpose of the utility model is achieved in this way:

[0007] A plug replacement device for a car jack comprises a base, a plug is movably arranged on the base, the plug comprises a connecting seat detachably connected to the base and a plug body, a support plate is arranged on the plug body, a mounting hole is arranged at the upper end of the connecting seat, a positioning hole is arranged at the bottom of the mounting hole, a mounting part and a positioning part are arranged on the plug body, the mounting part is adapted to the mounting hole, the positioning part passes through the mounting hole and cooperates with the positioning hole, so as to limit the relative rotation of the plug body and the connecting seat;

[0008] The side wall of the mounting portion is provided with a mounting groove, in which a limiting member is movably provided, and the outer side of the limiting member passes through the mounting groove and contacts the side wall of the mounting hole; the relative movement of the main body of the ram and the connecting seat is controlled, and the limiting member is deflected by the friction of the side wall of the mounting hole, thereby limiting the continued movement of the connecting seat and the main body of the ram.

[0009] The utility model is further configured as follows: an arc-shaped side wall adapted to the side wall of the mounting hole is arranged on the outer side of the limiting member.

[0010] The utility model is further configured as follows: the installation groove is annular and surrounds the outer periphery of the installation portion, and the limiting member is C-shaped and installed in the installation groove.

[0011] The utility model is further configured as follows: at least two groups of positioning walls are arranged on the outer periphery of the positioning hole, the positioning walls are evenly arranged around the axis of the positioning hole, and abutting walls matched with the positioning walls are arranged on the side of the positioning portion.

[0012] The utility model is further configured as follows: the connecting seat comprises a connecting seat body, a mounting hole is arranged at the upper end of the connecting seat body, a fixing hole is arranged at the bottom of the mounting hole, a sleeve is fixedly arranged in the fixing hole, and a positioning hole is arranged on the sleeve.

[0013] The utility model is further configured as follows: the diameter of the installation hole is larger than the diameter of the fixing hole, the sleeve is tightly matched with the positioning hole, an inclined first guide surface is provided at the upper end of the fixing hole, and the sleeve is guided and fixed in the positioning hole by the first guide surface.

[0014] The utility model is further configured as follows: an extension portion is provided between the support plate and the mounting portion.

[0015] The utility model is further configured as follows: a threaded hole is arranged on the base, and a threaded portion matching the threaded hole is arranged on the outer periphery of the connecting seat.

[0016] The utility model is further configured as follows: a second guide surface is provided at the end of the positioning portion, and the positioning portion is guided by the second guide surface to penetrate into the positioning hole.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. In the utility model, the connection seat and the plug body are positioned and connected through the positioning part and the positioning hole, and the connection seat and the plug body are limited by the limit piece. The structure is simple, the connection and separation of the connection seat and the plug body are convenient, and the user can quickly replace plugs of different specifications, so that the car jack is suitable for different models and convenient for users to use. The arrangement of the mounting hole and the mounting part is conducive to the stable connection between the connection seat and the plug body, and avoids damage to the positioning part and the positioning hole during use.

[0019] 2. The arc-shaped side wall of the utility model is conducive to increasing the contact surface between the limiter and the mounting hole, increasing the friction between the limiter and the mounting hole, and reducing the wear of the side wall of the mounting hole caused by stress concentration; the C-shaped limiter is convenient for the stable installation of the limiter and is convenient for production and processing.

[0020] 3. In the present invention, at least two groups of positioning walls evenly arranged around the circumference provide the main body of the plug and the connecting seat with multiple installation positions, which facilitates the quick connection and cooperation between the main body of the plug and the connecting seat.

[0021] 4. The arrangement of the connecting seat body and the sleeve in the utility model facilitates the production and processing of the positioning hole, and during the production process, the manufacturer can use a material with higher strength to manufacture the sleeve, thereby avoiding damage to the positioning hole during use, which is beneficial to extending the service life of the car jack; the tight-fitting sleeve and positioning hole are convenient for production and processing, and the arrangement of the first guide surface facilitates the rapid installation of the sleeve and the connecting seat body.

[0022] 5. The setting of the extension part in the utility model makes it easy for manufacturers to produce head bodies of different lengths according to needs, which is convenient for production and processing; the setting of the threaded hole and the threaded part further increases the jacking range of the car jack, which is convenient for users to use; the setting of the second guide surface facilitates the quick connection and cooperation between the positioning part and the positioning hole, which is convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is an explosion schematic diagram of the utility model;

[0025] Figure 3 It is a cross-sectional view of the utility model;

[0026] Figure 4 It is a cross-sectional view of the connecting seat in the utility model;

[0027] Figure 5 It is a structural schematic diagram of the sleeve in the utility model;

[0028] Figure 6 It is a structural schematic diagram of the main body of the plug in the first embodiment of the utility model;

[0029] Figure 7 It is a structural schematic diagram of the main body of the plug in the second embodiment of the utility model;

[0030] Figure 8 It is a cross-sectional view of the main body of the plug in the first embodiment of the utility model;

[0031] Fig. 9 It is a structural schematic diagram of the limiting member in the utility model.

[0032] Meaning of the numbers in the figure: 1-base; 11-threaded hole; 2-head; 3-connecting seat; 31-connecting seat body; 32-sleeve; 311-installation hole; 312-fixing hole; 313-first guide surface; 314-threaded part;

[0033] 321-positioning hole; 322-positioning wall; 4-head body; 41-support plate; 42-extension portion; 43-installation portion; 44-positioning portion; 45-second guide surface; 46-installation groove; 441-tightening wall; 5-limiting member;

[0034] 51-Curved side wall. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0036] See also Figures 1 to 9 As shown, a plug replacement device for a car jack, the plug 2 includes a detachably connected connection seat 3 and a plug body 4, a support plate 41 is provided on the plug body 4, a mounting hole 311 is provided on the upper end of the connection seat 3, a positioning hole 321 is provided at the bottom of the mounting hole 311, a mounting portion 43 and a positioning portion 44 are provided on the plug body 4, the mounting portion 43 is adapted to the mounting hole 311, the positioning portion 44 passes through the mounting hole 311 and cooperates with the positioning hole 321, so as to limit the relative rotation of the plug body 4 and the connection seat 3; a mounting groove 46 is provided on the side wall of the mounting portion 43, a limiting member 5 is movably provided in the mounting groove 46, the outer side of the limiting member 5 passes through the mounting groove 46 and contacts the side wall of the mounting hole 311; control The top head body 4 and the connecting seat 3 move relative to each other, and the limiting member 5 is deflected by the friction of the side wall of the mounting hole 311, thereby limiting the continued movement of the connecting seat 3 and the top head body 4. In this structure, the connecting seat 3 and the top head body 4 are positioned and connected by the positioning portion 44 and the positioning hole 321, and the connecting seat 3 and the top head body 4 are limited by the limiting member 5. The structure is simple, and the connection and disconnection of the connecting seat 3 and the top head body 4 are convenient, and the user can quickly replace the top heads 2 of different specifications, so that the car jack is suitable for different models and convenient for users to use. The setting of the mounting hole 311 and the mounting portion 43 is conducive to the stable connection between the connecting seat 3 and the top head body 4, and avoids damage to the positioning portion 44 and the positioning hole 321 during use.

[0037] When the jack body 4 and the connecting seat 3 are relatively disassembled or installed, the user manually controls the jack body 4 and the connecting seat 3 to move slowly relative to each other, so that the limit member 5 is reset under the action of gravity, thereby reducing the friction between the limit member 5 and the side wall of the mounting hole 311, so that the jack body 4 and the connecting seat 3 can be relatively disassembled or installed. When the car jack is lifted by the jack body 4, the limit member 5 will tilt and clamp the side wall of the mounting hole 311, thereby avoiding accidental separation of the jack body 4 and the connecting seat 3, making it convenient to carry and move the car jack.

[0038] When the car jack is used, the jack head 2 needs to be equipped with several jack bodies 4 of different specifications. The lengths of different jack bodies 4 are different. By replacing jack bodies 4 of different lengths, the maximum lifting height of the car jack can be quickly adjusted, which is convenient for users.

[0039] The plug body 4 in the utility model has two embodiments, and the first embodiment is as shown in the accompanying drawings of the specification. Figure 6 As shown in the figure, the support plate 41 is directly arranged on the mounting portion 43, and the plug body 4 is the plug body 4 with the smallest length; Example 2 is shown in the accompanying drawings of the specification Figure 7 and Figure 8 An extension portion 42 is provided between the support plate 41 and the mounting portion 43. The extension portion 42 increases the overall length of the plug body 4. The manufacturer can adjust the extension portion 42 to produce plug bodies 4 of different specifications, which is convenient for production and processing.

[0040] The connecting seat 3 is detachably connected to the base 1 of the car jack. A threaded hole 11 is provided on the base 1. A threaded portion 314 adapted to the threaded hole 11 is provided on the outer periphery of the connecting seat 3. The setting of the threaded hole 11 and the threaded portion 314 further increases the lifting range of the car jack and is convenient for users to use.

[0041] The outer side of the limiting member 5 described in the utility model is provided with an arcuate side wall 51 adapted to the side wall of the mounting hole 311. The arcuate side wall 51 is beneficial to increase the contact surface between the limiting member 5 and the mounting hole 311, increase the friction between the limiting member 5 and the mounting hole 311, and reduce the wear of the side wall of the mounting hole 311 caused by stress concentration.

[0042] The limiting member 5 may be in the shape of a strip, with one side of the limiting member 5 passing through the mounting groove 46 and contacting the side wall of the mounting hole 311. The utility model preferably has the mounting groove 46 in the shape of a ring and surrounds the outer periphery of the mounting portion 43. The limiting member 5 is in the shape of a C and is installed in the mounting groove 46. The C-shaped limiting member 5 facilitates the stable installation of the limiting member 5, avoids accidental detachment of the limiting member 5 from the mounting groove 46, and is convenient for production and processing.

[0043] At least two groups of positioning walls 322 are arranged on the outer circumference of the positioning hole 321, and the positioning walls 322 are evenly arranged around the axis of the positioning hole 321. A tightening wall 441 adapted to the positioning wall 322 is arranged on the side of the positioning portion 44. At least two groups of positioning walls 322 evenly arranged on the circumference enable the head body 4 and the connecting seat 3 to have multiple installation positions, which is convenient for the quick connection and cooperation between the head body 4 and the connecting seat 3. In this embodiment, six positioning walls 322 are evenly arranged on the outer circumference of the positioning hole 321, and six tightening walls 441 adapted to the positioning wall 322 are arranged on the side of the positioning portion 44.

[0044] The end of the positioning portion 44 in the utility model is provided with a second guide surface 45, and the positioning portion 44 is guided into the positioning hole 321 by the second guide surface 45. The setting of the second guide surface 45 facilitates the quick connection and cooperation between the positioning portion 44 and the positioning hole 321, which is convenient for users to use. Preferably, the second guide surface 45 is arc-shaped.

[0045] The connecting seat 3 includes a connecting seat body 31, a mounting hole 311 is arranged at the upper end of the connecting seat body 31, a fixing hole 312 is arranged at the bottom of the mounting hole 311, a sleeve 32 is fixedly arranged in the fixing hole 312, and a positioning hole 321 is arranged on the sleeve 32. The arrangement of the connecting seat body 31 and the sleeve 32 facilitates the production and processing of the positioning hole 321, and the manufacturer can use a material with higher strength to manufacture the sleeve 32 during the production process, thereby avoiding damage to the positioning hole 321 during use, which is beneficial to extending the service life of the car jack.

[0046] The diameter of the mounting hole 311 in the present invention is larger than the diameter of the fixing hole 312, the sleeve 32 is tightly fitted with the positioning hole 321, an inclined first guide surface 313 is provided at the upper end of the fixing hole 312, the sleeve 32 is guided and fixed in the positioning hole 321 by the first guide surface 313, the tightly fitted sleeve 32 and the positioning hole 321 are convenient for production and processing, and the provision of the first guide surface 313 facilitates the quick installation of the sleeve 32 and the connecting seat body 31, and preferably the first guide surface 313 is a conical surface.

[0047] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A head replacement device for a car jack, characterized in that: The plug (2) comprises a detachably connected connection seat (3) and a plug body (4); a support plate (41) is provided on the plug body (4); a mounting hole (311) is provided on the upper end of the connection seat (3); a positioning hole (321) is provided at the bottom of the mounting hole (311); a mounting portion (43) and a positioning portion (44) are provided on the plug body (4); the mounting portion (43) is adapted to fit the mounting hole (311); the positioning portion (44) passes through the mounting hole (311) and fits with the positioning hole (321), thereby limiting the relative rotation of the plug body (4) and the connection seat (3); The side wall of the mounting portion (43) is provided with a mounting groove (46), and a limiting member (5) is movably provided in the mounting groove (46). The outer side of the limiting member (5) passes through the mounting groove (46) and contacts the side wall of the mounting hole (311); the relative movement of the ejector body (4) and the connecting seat (3) is controlled, and the limiting member (5) is deflected by friction with the side wall of the mounting hole (311), thereby limiting the continued movement of the connecting seat (3) and the ejector body (4).

2. The head replacement device for a car jack according to claim 1, characterized in that: An arc-shaped side wall (51) adapted to the side wall of the mounting hole (311) is arranged on the outside of the limiting member (5).

3. The head replacement device for a car jack according to claim 2, characterized in that: The mounting groove (46) is annular and surrounds the outer circumference of the mounting portion (43); the limiting member (5) is C-shaped and is mounted in the mounting groove (46).

4. The head replacement device for a car jack according to claim 1, characterized in that: At least two groups of positioning walls (322) are arranged on the periphery of the positioning hole (321), the positioning walls (322) are evenly arranged around the axis of the positioning hole (321), and abutting walls (441) adapted to the positioning walls (322) are arranged on the side of the positioning portion (44).

5. The head replacement device for a car jack according to claim 1, characterized in that: The connection seat (3) comprises a connection seat body (31), a mounting hole (311) being arranged at the upper end of the connection seat body (31), a fixing hole (312) being arranged at the bottom of the mounting hole (311), a sleeve (32) being fixedly arranged in the fixing hole (312), and a positioning hole (321) being arranged on the sleeve (32).

6. The head replacement device for a car jack according to claim 5, characterized in that: The diameter of the mounting hole (311) is greater than the diameter of the fixing hole (312); the sleeve (32) is tightly matched with the positioning hole (321); an inclined first guide surface (313) is provided at the upper end of the fixing hole (312); and the sleeve (32) is guided and fixed in the positioning hole (321) by the first guide surface (313).

7. The head replacement device for a car jack according to claim 1, characterized in that: An extension portion (42) is provided between the support plate (41) and the mounting portion (43).

8. The head replacement device for a car jack according to claim 1, characterized in that: The connecting seat (3) is detachably connected to the base (1) of the automobile jack; a threaded hole (11) is provided on the base (1); and a threaded portion (314) adapted to the threaded hole (11) is provided on the outer periphery of the connecting seat (3).

9. The head replacement device for a car jack according to claim 1, characterized in that: A second guide surface (45) is provided at the end of the positioning portion (44), and the positioning portion (44) is guided by the second guide surface (45) to penetrate into the positioning hole (321).

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