Jack convenient for top replacement

Abstract

The utility model belongs to the technical field of jacks, and particularly relates to a jack convenient for top replacement, which comprises a base and an oil tank, a telescopic rod and a driving device are connected onto the base, a top is detachably arranged on the telescopic rod, and the top comprises a top body and a connecting seat detachably connected with the telescopic rod. A mounting part and a positioning part are arranged on the plug main body, a mounting hole is formed in the upper end of the connecting seat, and a positioning hole is formed in the bottom of the mounting hole; a clamping groove is formed in the side wall of the mounting part, a mounting groove is formed in the side wall of the mounting hole, a C-shaped limiting piece is movably arranged in the mounting groove, and the inner side of the C-shaped limiting piece penetrates into the clamping groove so as to limit the relative movement of the plug main body and the connecting seat; the C-shaped limiting piece is made of elastic materials, a limiting protruding edge is arranged on the side, close to the positioning part, of the clamping groove, and a first guide face and a second guide face are arranged on the two sides of the limiting protruding edge respectively. The utility model aims to provide the jack convenient for replacing the top head, which is simple in structure and convenient for a user to use.

Description

Technical Field

[0001] This utility model belongs to the field of jack technology, and specifically relates to a jack that is easy to replace the jack head. Background Technology

[0002] A car jack is a common tool in car repair. During vehicle repair, a car jack can be used for lifting, supporting, and other tasks.

[0003] Some car jacks on the market are equipped with multiple jack heads, allowing users to replace them as needed. For example, Chinese utility model patent CN202321378594.0 discloses a jack head that is easy to replace, which includes a large piston. A base is fixedly connected to the lower outer surface of the large piston. An interface is opened at the center of the upper outer surface of the large piston, and a support column is slidably connected to the interface. A bayonet is opened on the left inner surface of the support column, and a groove is provided on the front inner surface of the bayonet near the left side. A pressing head is slidably connected to the inner surface of the groove. A first spring is fixedly connected to the left outer surface of the pressing head near the upper end. A sliding plate is fixedly connected to the center of the left outer surface of the pressing head. A connector is movably connected to the inner surface of the interface. An opening is opened on the lower left inner surface of the connector. A second spring is fixedly connected to the right inner surface of the opening, and a bayonet is fixedly connected to the other end of the second spring. A soft pad is fixedly connected to the center of the bottom inner surface of the large piston.

[0004] The above structure controls the large piston and support column to be relatively fixed through the clamp and the clamp, which is conducive to the stable connection of the top head. However, the structure is relatively complex and inconvenient to assemble and produce. In addition, during the disassembly process, the user needs to drive the two sliding plates to move at the same time, which is inconvenient for the quick disassembly of the top head. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of this utility model is to provide a jack with a simple structure and convenient user operation for easy replacement of the jack head.

[0006] The purpose of this utility model is achieved as follows:

[0007] A jack with an easy-to-replace jack head includes a base and an oil tank. A telescopic rod and a drive device are connected to the base. A jack head is detachably mounted on the telescopic rod. The jack head includes a jack head body and a connecting seat detachably connected to the telescopic rod. The jack head body is provided with an installation part and a positioning part. The upper end of the connecting seat is provided with an installation hole, and the bottom of the installation hole is provided with a positioning hole. The installation part is adapted to the installation hole, and the positioning part passes through the installation hole and cooperates with the positioning hole, thereby restricting the relative rotation between the jack head body and the connecting seat.

[0008] A slot is provided on the side wall of the mounting part, and a mounting groove is provided on the side wall of the mounting hole. A C-shaped limiting member is movably disposed in the mounting groove. The inner side of the C-shaped limiting member passes into the slot to restrict the relative movement between the top head body and the connecting seat. The C-shaped limiting member is made of elastic material. A limiting protrusion is provided on the side of the slot near the positioning part. A first guide surface and a second guide surface are respectively provided on both sides of the limiting protrusion. Under the action of external force, the first guide surface and the second guide surface drive the C-shaped limiting member to deform, thereby allowing the C-shaped limiting member to engage or disengage from the slot.

[0009] The present invention is further configured such that: the main body of the jack is located on one side of the center of gravity of the jack; the jack is controlled to be suspended by the main body of the jack, and the connecting seat and the C-shaped limiting component tilt under the gravity of the jack, thereby preventing the C-shaped limiting component from disengaging from the slot.

[0010] The present invention is further configured such that: the C-shaped limiting member is bent inward or protrudes to form a limiting part, and the limiting part can extend into the slot so that the C-shaped limiting member and the slot are stably engaged.

[0011] The present invention is further configured such that: the C-shaped limiting member is made of an elastic metal wire, and the metal wire is bent to form the limiting part.

[0012] The present invention is further configured such that: a first support wall is provided on the top body, and a second support wall is provided at the upper end of the connecting seat; when the second support wall abuts against the first support wall, the connecting seat supports the top body.

[0013] The present invention is further configured such that: the distance between the first support wall and the slot is greater than the distance between the second support wall and the mounting slot; a third guide surface is provided on the side of the slot away from the limiting protrusion; the C-shaped limiting member can be guided by the third guide surface to detach from the slot and be sleeved on the mounting part, thereby so that the first support wall abuts against the second support wall.

[0014] The present invention is further configured such that the depth of the mounting hole is greater than the depth of the mounting part, thereby preventing the mounting part from abutting against the bottom of the mounting hole and causing deformation of the positioning hole, and making the first support wall abut against the second support wall.

[0015] The present invention is further configured such that: a tapered fourth guide surface is provided at the upper end of the mounting hole, the fourth guide surface can guide the mounting part to quickly fit with the mounting hole, and the C-shaped limiting member can abut against the fourth guide surface and deform, thereby allowing the C-shaped limiting member to pass into the mounting hole.

[0016] The present invention is further configured such that: a support plate for supporting the object is provided on the top body, and an extension portion is provided between the support plate and the mounting portion.

[0017] The present invention is further configured such that: the connecting seat and the telescopic rod are detachably connected, the telescopic rod is provided with a threaded hole, and the outer periphery of the connecting seat is provided with a threaded portion that matches the threaded hole.

[0018] The advantages of this utility model compared to the prior art are:

[0019] 1. In this utility model, the inner and outer sides of the C-shaped limiting component are respectively engaged with the slot and the mounting slot, thereby restricting the relative movement between the top head body and the connecting seat. When the base is placed on the ground, the first guide surface and the second guide surface can drive the C-shaped limiting component to deform so that the slot and the mounting slot are engaged or disengaged. The structure is simple, which facilitates the disassembly and installation of the top head body, makes it easy to disassemble and replace the top head body, and is convenient for users.

[0020] 2. In this utility model, when the jack is suspended in the air by controlling the main body of the jack, the connecting seat and the C-shaped limiting part will tilt, so that one side of the C-shaped limiting part will keep in contact with the slot, thereby preventing the main body of the jack from detaching from the connecting seat and avoiding the base from falling off accidentally during the process, which helps to improve the safety of the jack; the limiting part that extends into the slot facilitates the stable cooperation between the C-shaped limiting part and the slot, preventing the C-shaped limiting part from accidentally detaching from the slot during use, which helps to improve the safety of the jack; the C-shaped limiting part made of elastic metal wire has a simple structure, is easy to manufacture and process, and has low production cost.

[0021] 3. The first and second support walls in this utility model facilitate stable support of the connecting seat for the main body of the jack, preventing stress concentration that could lead to deformation and damage to the connecting seat and the main body of the jack. Since the distance between the first support wall and the slot is greater than the distance between the second support wall and the mounting slot, the C-shaped limiting piece can be inserted into or extend beyond the slot during jack use. This reduces the likelihood of the C-shaped limiting piece failing to engage with the slot due to production or installation errors, making it more convenient for users. The third guide surface facilitates the disengagement of the C-shaped limiting piece from the slot, promoting contact between the first and second support walls. Furthermore, the depth of the mounting hole is greater than the depth of the mounting part, preventing deformation of the positioning hole from affecting the connection between the positioning part and the positioning hole.

[0022] 4. The fourth guide surface in this utility model not only facilitates the quick fit between the mounting plate and the mounting hole, but also facilitates the insertion of the C-shaped limiting component into the mounting hole, making the installation of the C-shaped limiting component convenient and the assembly and production of the jack convenient; the extension part can increase the overall length of the jack body, and the manufacturer can adjust the extension part to produce jack bodies of different specifications, which is convenient for production and processing.

[0023] 5. The threaded hole and threaded part in this utility model facilitate the disassembly and installation of the jack and the telescopic rod, and this structure can further expand the lifting range of the car jack, making it more convenient for users. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is an exploded view of the connection structure between the telescopic rod and the top head in this utility model;

[0026] Figure 3 This is a cross-sectional view of the connection structure between the telescopic rod and the top head in this utility model;

[0027] Figure 4 This is a cross-sectional view of the main body of the top head in Embodiment 1 of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the top head body in Embodiment 1 of this utility model;

[0029] Figure 6 This is a cross-sectional view of the top head body in Embodiment 2 of this utility model;

[0030] Figure 7 This is a partial sectional view of the connecting seat in this utility model;

[0031] Figure 8 This is a structural schematic diagram of the C-shaped limiting component in this utility model.

[0032] The labels in the diagram mean: 1-base; 2-oil tank; 3-drive device; 4-telescopic rod; 41-base rod;

[0033] 42-Extension rod; 43-Threaded hole; 6-Top; 61-Top body; 62-Connecting seat; 611-Support plate; 612-Mounting part; 613-Positioning part; 614-Limiting flange; 615-Slot; 616-Second guide surface; 617-First guide surface; 618-Third guide surface; 619-Extension part; 6111-First support wall;

[0034] 621-Threaded part; 622-Mounting hole; 623-Positioning hole; 624-Mounting groove; 625-Fourth guide surface; 626-Second support wall; 7-C-shaped limiting member; 72-Limiting part; 73-Arc-shaped side wall. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] See Figures 1 to 8As shown, a jack with an easy-to-replace jack head includes a base 1 and an oil tank 2. A telescopic rod 4 and a drive device 3 are connected to the base 1. A jack head 6 is detachably mounted on the telescopic rod 4. The jack head 6 includes a jack head body 61 and a connecting seat 62 detachably connected to the telescopic rod 4. The jack head body 61 is provided with an installation part 612 and a positioning part 613. The upper end of the connecting seat 62 is provided with an installation hole 622, and the bottom of the installation hole 622 is provided with a positioning hole 623. The installation part 612 is adapted to the installation hole 622, and the positioning part 613 passes through the installation hole 622 and cooperates with the positioning hole 623, thereby restricting the relative rotation between the jack head body 61 and the connecting seat 62.

[0037] The mounting part 612 has a slot 615 on its side wall, and the mounting hole 622 has a mounting groove 624 on its side wall. A C-shaped limiting member 7 is movably disposed in the mounting groove 624. The inner side of the C-shaped limiting member 7 passes into the slot 615 to restrict the relative movement between the top head body 61 and the connecting seat 62. The C-shaped limiting member 7 is made of elastic material. A limiting flange 614 is provided on the side of the slot 615 near the positioning part 613. A first guide surface 617 and a second guide surface 616 are respectively provided on both sides of the limiting flange 614. Under the action of external force, the first guide surface 617 and the second guide surface 616 drive the C-shaped limiting member 7 to deform, thereby allowing the C-shaped limiting member 7 to engage or disengage from the slot 615.

[0038] In the above structure, the inner and outer sides of the C-shaped limiting member 7 are respectively engaged with the slot 615 and the mounting slot 624, thereby restricting the relative movement between the top body 61 and the connecting seat 62. When the base 1 is placed on the ground, the first guide surface 617 and the second guide surface 616 can drive the C-shaped limiting member 7 to deform, so that the slot 615 and the mounting slot 624 are engaged or disengaged. The structure is simple, which facilitates the disassembly and installation of the top body 61, and makes it easy to disassemble and replace the top body 61, making it convenient for users.

[0039] The jack body 61 is positioned on one side of the jack's center of gravity. By controlling the jack to be suspended through the jack body 61, the connecting seat 62 and the C-shaped limiting member 7 tilt under the weight of the jack, thereby preventing the C-shaped limiting member 7 from disengaging from the slot 615. Since the connecting seat 62 and the C-shaped limiting member 7 will tilt when the jack is suspended through the jack body 61, one side of the C-shaped limiting member 7 will maintain engagement with the slot 615, thus preventing the jack body 61 from disengaging from the connecting seat 62. This prevents the base 1 from accidentally falling during the process and improves the safety of the jack.

[0040] The C-shaped limiting member 7 bends inward or protrudes to form a limiting part 72. The limiting part 72 can extend into the slot 615 to make the C-shaped limiting member 7 stably cooperate with the slot 615. The limiting part 72 extending into the slot 615 facilitates the stable cooperation between the C-shaped limiting member 7 and the slot 615, and avoids the C-shaped limiting member 7 from accidentally disengaging from the slot 615 during use, which helps to improve the safety of the jack. In this utility model, the limiting part 72 bends or protrudes towards the center of the C-shaped limiting member 7. In this structure, the limiting part 72 can penetrate into the slot 615 to a greater depth.

[0041] The C-shaped limiting member 7 described in this utility model is made of elastic metal wire. The metal wire is bent to form the limiting part 72. The C-shaped limiting member 7 made of elastic metal wire has a simple structure, is easy to manufacture and process, and has low production cost.

[0042] In this embodiment, the C-shaped limiting member 7 is preferably made of a cylindrical metal wire bent into shape. The C-shaped limiting member 7 has an arc-shaped sidewall 73, which facilitates the C-shaped limiting member 7 to pass over the limiting protrusion 614 and facilitates the disassembly and installation of the top body 61 and the connecting seat 62. In this embodiment, the C-shaped limiting member 7 is arc-shaped, and two limiting parts 72 are provided on the C-shaped limiting member 7 at intervals. The two limiting parts 72 are respectively provided on both sides of the C-shaped limiting member 7.

[0043] The top body 61 is provided with a first support wall 6111, and the upper end of the connecting seat 62 is provided with a second support wall 626. When the second support wall 626 is pressed against the first support wall 6111, the connecting seat 62 supports the top body 61. The arrangement of the first support wall 6111 and the second support wall 626 is conducive to the stable support of the connecting seat 62 on the top body 61, and avoids stress concentration that could cause deformation and damage to the connecting seat 62 and the top body 61.

[0044] In this invention, the distance between the first support wall 6111 and the slot 615 is greater than the distance between the second support wall 626 and the mounting groove 624. A third guide surface 618 is provided on the side of the slot 615 away from the limiting protrusion 614. The C-shaped limiting member 7 can be guided by the third guide surface 618 to detach from the slot 615 and be fitted onto the mounting part 612, thereby making the first support wall 6111 abut against the second support wall 626. During the use of this jack, the C-shaped limiting member 7 can be inserted into or pass through the slot 615, which can reduce the occurrence of situations where the C-shaped limiting member 7 cannot cooperate with the slot 615 due to production errors or installation errors, making it convenient for users to use. The setting of the third guide surface 618 facilitates the detachment of the C-shaped limiting member 7 from the slot 615, which is beneficial to the contact between the first support wall 6111 and the second support wall 626.

[0045] Preferably, the depth of the mounting hole 622 is greater than the depth of the mounting part 612, thereby preventing the mounting part 612 from abutting against the bottom of the mounting hole 622 and causing deformation of the positioning hole 623, and making the first support wall 6111 abut against the second support wall 626. This structure is beneficial to the stable support of the connecting seat 62 on the top body 61 and to extending the service life of the jack.

[0046] The upper end of the mounting hole 622 is provided with a tapered fourth guide surface 625. The fourth guide surface 625 can guide the mounting part 612 to quickly fit with the mounting hole 622. The C-shaped limiting member 7 can abut against the fourth guide surface 625 and deform, so that the C-shaped limiting member 7 can pass into the mounting hole 622. The setting of the fourth guide surface 625 not only facilitates the quick fit between the mounting plate and the mounting hole 622, but also facilitates the C-shaped limiting member 7 to pass into the mounting hole 622, which facilitates the installation of the C-shaped limiting member 7 and the assembly and production of the jack.

[0047] The connecting seat 62 is detachably connected to the telescopic rod 4. The telescopic rod 4 is provided with a threaded hole 43, and the outer periphery of the connecting seat 62 is provided with a threaded part 621 that matches the threaded hole 43. The threaded hole 43 and the threaded part 621 facilitate the disassembly and installation of the jack 6 and the telescopic rod 4. Moreover, this structure can further expand the lifting range of the car jack, making it more convenient for users.

[0048] In this embodiment, the telescopic rod 4 includes a base rod 41 fixedly connected to the base 1, an extension rod 42 slidably disposed on the base rod 41, and a threaded hole 43 disposed in the extension rod 42.

[0049] In this utility model, when using the car jack, the jack head 6 needs to be equipped with several jack head bodies 61 of different specifications. The lengths of the different jack head bodies 61 are different. By replacing the jack head bodies 61 of different lengths, the maximum lifting height of the car jack can be quickly adjusted, making it convenient for users to use.

[0050] The top body 61 of this utility model is provided with a support plate 611 for supporting the object. The top body 61 has two implementation methods. The first embodiment is shown in the attached drawings. Figure 4 and Figure 5 As shown, the support plate 611 is directly mounted on the mounting part 612, the first support wall 6111 is located at the lower end of the support arm, and the top head body 61 is the top head body 61 with the shortest length; Embodiment 2 is shown in the attached drawings of the specification. Figure 6An extension portion 619 is provided between the support plate 611 and the mounting portion 612. The first support wall 6111 is provided at the lower end of the extension portion 619. The overall length of the top body 61 is increased by the extension portion 619. The producer can adjust the extension portion 619 to produce top bodies 61 of different specifications, which facilitates production and processing.

[0051] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A jack with an easy-to-replace jack head, comprising a base (1) and an oil tank (2), wherein a telescopic rod (4) and a drive device (3) are connected to the base (1), and a jack head (6) is detachably mounted on the telescopic rod (4), characterized in that: The top head (6) includes a top head body (61) and a connecting seat (62) detachably connected to the telescopic rod (4). The top head body (61) is provided with an installation part (612) and a positioning part (613). The upper end of the connecting seat (62) is provided with an installation hole (622), and the bottom of the installation hole (622) is provided with a positioning hole (623). The installation part (612) is adapted to the installation hole (622), and the positioning part (613) passes through the installation hole (622) and cooperates with the positioning hole (623), thereby restricting the relative rotation between the top head body (61) and the connecting seat (62). The mounting part (612) has a slot (615) on its side wall and a mounting groove (624) on its side wall. A C-shaped limiting member (7) is movably disposed in the mounting groove (624). The inner side of the C-shaped limiting member (7) is inserted into the slot (615) to restrict the relative movement between the top body (61) and the connecting seat (62). The C-shaped limiting member (7) is made of elastic material. A limiting flange (614) is provided on the side of the slot (615) near the positioning part (613). A first guide surface (617) and a second guide surface (616) are provided on both sides of the limiting flange (614). Under the action of external force, the first guide surface (617) and the second guide surface (616) drive the C-shaped limiting member (7) to deform, thereby allowing the C-shaped limiting member (7) to engage or disengage from the slot (615).

2. The jack for easy head replacement according to claim 1, characterized in that: The jack body (61) is located on one side of the center of gravity of the jack; the jack is controlled to be suspended by the jack body (61), and the connecting seat (62) and the C-shaped limiting piece (7) tilt under the gravity of the jack, thereby preventing the C-shaped limiting piece (7) from separating from the slot (615).

3. The jack for easy head replacement according to claim 1, characterized in that: The C-shaped limiting member (7) bends inward or protrudes to form a limiting part (72), which can extend into the slot (615) to make the C-shaped limiting member (7) and the slot (615) stably cooperate.

4. A jack with an easily replaceable jack head according to claim 3, characterized in that: The C-shaped limiting member (7) is made of an elastic metal wire, which is bent to form the limiting part (72).

5. A jack for easy head replacement according to claim 1, characterized in that: The top body (61) is provided with a first support wall (6111), and the upper end of the connecting seat (62) is provided with a second support wall (626). When the second support wall (626) abuts against the first support wall (6111), the connecting seat (62) supports the top body (61).

6. A jack for easy head replacement according to claim 5, characterized in that: The distance between the first support wall (6111) and the slot (615) is greater than the distance between the second support wall (626) and the mounting groove (624). A third guide surface (618) is provided on the side of the slot (615) away from the limiting protrusion (614). The C-shaped limiting member (7) can be guided by the third guide surface (618) to detach from the slot (615) and be sleeved on the mounting part (612), so that the first support wall (6111) abuts against the second support wall (626).

7. A jack with an easily replaceable jack head according to claim 6, characterized in that: The depth of the mounting hole (622) is greater than the depth of the mounting part (612), thereby preventing the mounting part (612) from abutting against the bottom of the mounting hole (622) and causing the positioning hole (623) to deform, and making the first support wall (6111) abut against the second support wall (626).

8. A jack with an easily replaceable jack head according to claim 1, characterized in that: The upper end of the mounting hole (622) is provided with a tapered fourth guide surface (625). The fourth guide surface (625) can guide the mounting part (612) so that the mounting part (612) can quickly fit with the mounting hole (622). The C-shaped limiting member (7) can abut against the fourth guide surface (625) and deform, so that the C-shaped limiting member (7) can pass into the mounting hole (622).

9. A jack for easy head replacement according to claim 1, characterized in that: The top body (61) is provided with a support plate (611) for supporting the object, and an extension part (619) is provided between the support plate (611) and the mounting part (612).

10. A jack for easy head replacement according to claim 1, characterized in that: The connecting seat (62) is detachably connected to the telescopic rod (4). The telescopic rod (4) is provided with a threaded hole (43), and the outer periphery of the connecting seat (62) is provided with a threaded part (621) that is adapted to the threaded hole (43).

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