Portable jack

Abstract

The utility model relates to a portable jack which comprises a jack body. The mounting shell comprises a fixed shell, a mounting cover, a pressing groove, a roller moving groove, a guide groove, a threaded hole, a through hole and a moving hole, and is arranged on the outer surface of the jack main body; the pulley mechanism comprises a transmission rope, a fixed pulley block and a movable pulley block; the transmission gear is arranged in the mounting shell and is meshed with the pulley mechanism; the vertical movable block is meshed with the transmission gear; and the pedal mechanism is arranged in the pressing groove. Through the arrangement of the transmission rope, the fixed pulley block, the movable pulley block and other components, and through the matching relation between the transmission rope and the movable pulley, the device can save labor through the movable pulley instead of a lever, and the fixed pulley and the transmission gear play a role in changing the force direction; and the plunger can be driven by the vertical movable block to move.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, in particular to a portable jack. Background Art

[0002] A jack is a small and light lifting equipment that uses a rigid lifting piece as a working device and can lift heavy objects within a small stroke of a top support or a bottom support claw. Jacks are mainly used in factories, mines, transportation and other departments for vehicle repairs and other lifting and supporting work. Their structure is light, strong, flexible and reliable, and can be carried and operated by one person. This type of small and easy-to-carry jack is also called a portable jack.

[0003] Hydraulic jack is the most common portable jack, which is often used for car maintenance. When in use, after installing the operating handle, press the operating handle to make the plunger move vertically in the small cylinder, and press the hydraulic oil into the main cylinder to push the piston and the top to move upward, which plays a supporting role. In order to facilitate the use of the operating handle, the lever principle is adopted. At this time, the length of the power arm is much greater than the length of the resistance arm, so it plays a labor-saving role. However, due to the long power arm, the vertical movement distance of the end of the operating handle away from the fulcrum is large;

[0004] Since the distance between the chassis and the bottom of the car is small, when using the jack for lifting, there will be a problem of insufficient space to press down, and when using it, the user needs to bend down or even squat down to use it. Bending down and squatting down is not only inconvenient for the user to exert strength but also easy to get tired. Therefore, a portable jack is proposed to solve the above problems. Utility Model Content

[0005] Based on the above description, the utility model provides a portable jack to solve the problem that the existing portable jack using an operating handle is inconvenient to operate due to the small space between the car and the bottom surface.

[0006] The utility model solves the above-mentioned technical problem through the following technical solution: a portable jack, comprising: a jack body; a mounting shell comprising a fixed shell, a mounting cover, a pressing groove, a roller movable groove, a guide groove, a threaded hole, a through hole and a movable hole, the mounting shell is arranged on the outer surface of the jack body, the pulley mechanism comprises a transmission rope, a fixed pulley group and a movable pulley group, the pulley mechanism is arranged inside the roller movable groove, the transmission gear is arranged inside the mounting shell and meshes with the pulley mechanism, the vertical movable block is meshed with the transmission gear and is connected to the plunger of the jack body by screws and nuts, the pedal mechanism is arranged inside the pressing groove and extends to the outside of the mounting shell and is connected to one end of the transmission rope, and the support spring is arranged between the mounting shell and the jack body.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the fixed shell is arranged on the outside of the jack body, and the mounting cover is provided on one side of the fixed shell by screws, and the guide groove, the roller movable groove and the pressing groove are provided on the opposite sides of the fixed shell and the mounting cover, and the upper and lower side walls of the fixed shell and the mounting cover are provided with the threaded holes, through holes and movable holes.

[0009] Furthermore, the transmission rope includes a connecting plate, and the connecting plate is arranged on the upper surface of the mounting shell through the cooperation of screws and the threaded holes, and the rope is arranged on the lower surface of the connecting plate.

[0010] Furthermore, the fixed pulley assembly includes a fixed frame, the fixed frame is arranged inside the roller movable groove, and a fixed pulley is arranged inside the fixed frame.

[0011] Furthermore, a threaded column is provided on the upper surface of the fixing frame, and the threaded column passes through the through hole and is connected to the mounting shell through a nut.

[0012] Furthermore, the movable pulley group includes a movable frame, which is arranged inside the roller movable groove, and a movable pulley is arranged inside the movable frame. A movable tooth plate is arranged on a side of the movable frame close to the transmission gear, and the movable tooth plate is meshed with the transmission gear.

[0013] Furthermore, the pedal mechanism includes a movable column, which is arranged inside the pressing groove, a pedal passing through the pressing groove is arranged on one side of the movable column, a hinge block is arranged at the top of the movable column, and a return spring is arranged between the movable column and the mounting shell.

[0014] Furthermore, one end of the rope is arranged inside the hinge block and contacts the movable pulley and the fixed pulley in sequence.

[0015] Furthermore, the vertical movable block includes a vertical column, which is arranged inside the guide groove. A vertical tooth plate is provided at the bottom end of the vertical column. The vertical tooth plate extends to the outside of the mounting shell and is interconnected with the plunger of the jack body.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] 1. The utility model provides components such as a transmission rope, a fixed pulley group and a movable pulley group, and the matching relationship between the transmission rope and the movable pulley enables the device to save effort by replacing the lever with the movable pulley, wherein the fixed pulley and the transmission gear play a role in changing the direction of the force, so that the plunger can move downward or upward under the drive of the vertical movable block;

[0018] 2. By setting up the pedal mechanism, the transmission rope and the movable pulley block can be driven to move by stepping on the foot. In this process, the reset spring is compressed, the movable pulley block moves upward, and then drives the vertical movable block to move downward. After the movement, the pedal is released. At this time, the pedal mechanism is reset under the action of the reset spring, so that the vertical movable block is reset together. In this process, the main body of the jack plays a normal lifting role. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a portable jack provided in an embodiment of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0021] Figure 3 for Figure 1 Schematic diagram of the internal structure;

[0022] Figure 4 for Figure 3 A structural diagram from another perspective;

[0023] Figure 5 This is a schematic diagram of the structure of the installation shell in the embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of a fixed pulley block in an embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the movable pulley block in the embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the vertical movable block in the embodiment of the utility model;

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Jack body; 2. Mounting shell; 21. Fixed shell; 22. Mounting cover; 23. Pressing groove; 24. Roller movable groove; 25. Guide groove; 26. Threaded hole; 27. Through hole; 28. Movable hole; 3. Transmission gear; 4. Transmission rope; 41. Connecting plate; 42. Rope; 5. Fixed pulley block; 51. Fixed frame; 52. Fixed pulley; 53. Threaded column; 6. Movable pulley block; 61. Movable frame; 62. Movable pulley; 63. Movable tooth plate; 7. Pedal mechanism; 71. Movable column; 72. Articulated block; 73. Pedal; 74. Reset spring; 8. Vertical movable block; 81. Vertical tooth plate; 82. Vertical column; 9. Support spring. DETAILED DESCRIPTION

[0029] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0031] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0032] See also Figure 1 , Figure 2 as well as Figure 5 , a portable jack, comprising:

[0033] A jack body 1; and

[0034] The mounting shell 2 comprises a fixed shell 21, a mounting cover 22, a pressing groove 23, a roller movable groove 24, a guide groove 25, a threaded hole 26, a through hole 27 and a movable hole 28. The mounting shell 2 is arranged on the outer surface of the jack body 1. The fixed shell 21 is arranged outside the jack body 1. The mounting cover 22 is arranged on one side of the fixed shell 21 by screws. The guide groove 25, the roller movable groove 24 and the pressing groove 23 are arranged on opposite sides of the fixed shell 21 and the mounting cover 22. The threaded hole 26, the through hole 27 and the movable hole 28 are arranged on the upper and lower side walls of the fixed shell 21 and the mounting cover 22.

[0035] Based on the above, the specific structure and principle of the jack body 1 are all existing technologies, so its internal structure is not repeated, and the setting of the mounting shell 2 provides activity space for the pulley mechanism, the transmission gear 3, the vertical movable block 8 and the pedal mechanism 7, wherein the pressing groove 23 restricts the pedal mechanism 7, the roller movable groove 24 restricts the pulley mechanism, and the guide groove 25 restricts the vertical movable block 8, so that the pedal mechanism 7, the pulley mechanism and the vertical movable block 8 can only move vertically, and the setting of the threaded hole 26 cooperates with the screw to fix the connecting plate 42.

[0036] like Figure 2-Figure 4 , Figure 6 as well as Figure 7 As shown, the pulley mechanism includes a transmission rope 4, a fixed pulley group 5 and a movable pulley group 6, and the pulley mechanism is arranged inside the roller movable groove 24;

[0037] The fixed pulley assembly 5 includes a fixing frame 51, which is arranged inside the roller movable groove 24, and a fixed pulley 52 is arranged inside the fixing frame 51. A threaded column 53 is arranged on the upper surface of the fixing frame 51, and the threaded column 53 passes through the through hole 27 and is connected to the mounting shell 2 through a nut.

[0038] The movable pulley group 6 includes a movable frame 61, which is arranged inside the roller movable groove 24, and a movable pulley 62 is arranged inside the movable frame 61. A movable tooth plate 63 is arranged on a side of the movable frame 61 close to the transmission gear 3, and the movable tooth plate 63 is meshed with the transmission gear 3.

[0039] The transmission rope 4 includes a connecting plate 41, which is arranged on the upper surface of the mounting shell 2 by means of screws and the threaded holes 26, and the rope 42 is arranged on the lower surface of the connecting plate 41, and the rope 42 contacts the movable pulley 62 and the fixed pulley 52 in sequence;

[0040] Based on the above, the pulley mechanism plays a role in replacing the lever (i.e., the operating handle and other structures). When one end of the transmission rope 4 is pulled by force, the movable pulley group 6 moves upward. In this process, the movable tooth plate 63 drives the transmission gear 3 to rotate. Since the device is provided with a movable pulley, it can save effort, and the fixed pulley group 5 plays a role in changing the direction of force.

[0041] like Figure 2-Figure 4 as well as Figure 8 As shown, the vertical movable block 8 is meshed with the transmission gear 3 and connected to the plunger of the jack body 1 through screws and nuts. The vertical movable block 8 includes a vertical column 82, which is arranged inside the guide groove 25. A vertical tooth plate 81 is arranged at the bottom end of the vertical column 82. The vertical tooth plate 81 extends to the outside of the mounting shell 2 and is connected to the plunger of the jack body 1.

[0042] A pedal mechanism 7, which is arranged inside the pressing groove 23, extends to the outside of the mounting shell 2, and is connected to one end of the transmission rope 4, the pedal mechanism 7 includes a movable column 71, the movable column 71 is arranged inside the pressing groove 23, a pedal 73 penetrating the pressing groove 23 is arranged on one side of the movable column 71, a hinge block 72 is arranged at the top of the movable column 71, a return spring 74 is arranged between the movable column 71 and the mounting shell 2, and one end of the rope 42 is arranged inside the hinge block 72;

[0043] A support spring 9 is disposed between the mounting shell 2 and the jack body 1 and outside the vertical column 82. The support spring 9 can be stretched or compressed following the movement of the plunger;

[0044] Based on the above, when the pedal 73 is pressed with the foot, the foot-operated mechanism 7 pulls the transmission rope 4, causing the movable pulley group 6 to move upward and the electric transmission gear 3 to rotate. At this time, the vertical movable block 8 cooperates with the transmission gear 3 to make the vertical movable block 8 move downward when the movable tooth plate 63 moves upward. During this process, the reset spring 74 is in a compressed state, and the support spring 9 is in a stretched state. When the foot is separated from the pedal 73, the vertical movable block 8 and the foot-operated mechanism 7 are reset by the elastic force of the reset spring 74 and the support spring 9.

[0045] In actual use of this embodiment, after the pulley mechanism, the transmission gear 3, the vertical movable block 8, the pedal mechanism 7 and the support spring 9 are installed, the state of the device is as follows: Figure 3 As shown;

[0046] When the jack is needed to lift the car, the pedal 73 is pressed by stepping on it, so that the pedal 73 drives the hinge block 72 and the movable column 71 to move downward, which on the one hand compresses the return spring 74, and on the other hand pulls one end of the rope 41, so that the movable pulley set 6 can move upward, and then the movable tooth plate 63 cooperates with the transmission gear 3 to drive the vertical movable block 8 to move downward, and at this time the support spring 9 is stretched;

[0047] When the foot is separated from the pedal 73, the vertical movable block 8 and the movable column 71 and other structures are reset under the action of the spring elastic force, thereby driving the movable pulley group 6 to reset together. At this time, a vertical reciprocating movement of the plunger is completed. At this time, the piston and the head of the jack body 1 both move upward for a short distance, that is, the normal operation of the jack;

[0048] The device replaces the traditional lever structure with a movable pulley, which not only retains the labor-saving function, but also replaces the pressing method with the hand by stepping on it, making it easier to operate with force. In addition, the device does not require a large operating space and is more convenient to operate.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable jack, characterized in that: include: Jack body (1); as well as A mounting shell (2), comprising a fixed shell (21), a mounting cover (22), a pressing groove (23), a roller movable groove (24), a guide groove (25), a threaded hole (26), a through hole (27) and a movable hole (28), wherein the mounting shell (2) is arranged on the outer surface of the jack body (1); A pulley mechanism, comprising a transmission rope (4), a fixed pulley group (5) and a movable pulley group (6), wherein the pulley mechanism is arranged inside the roller movable groove (24); A transmission gear (3), which is arranged inside the mounting shell (2) and meshes with the pulley mechanism; A vertical movable block (8) meshing with the transmission gear (3) and connected to the plunger of the jack body (1) via screws and nuts; A pedal mechanism (7), which is arranged inside the pressing groove (23), extends to the outside of the mounting shell (2), and is connected to one end of the transmission rope (4); A supporting spring (9) is arranged between the mounting shell (2) and the jack body (1).

2. The jack according to claim 1, characterized in that: The fixed shell (21) is arranged outside the jack body (1); the mounting cover (22) is arranged on one side of the fixed shell (21) by screws; the fixed shell (21) and the mounting cover (22) are arranged on opposite sides thereof with guide grooves (25), roller movable grooves (24) and pressing grooves (23); the upper and lower side walls of the fixed shell (21) and the mounting cover (22) are arranged with threaded holes (26), through holes (27) and movable holes (28).

3. The jack according to claim 2, characterized in that: The transmission rope (4) comprises a connecting plate (41), wherein the connecting plate (41) is arranged on the upper surface of the mounting shell (2) by means of screws cooperating with the threaded holes (26), and a rope (42) is arranged on the lower surface of the connecting plate (41).

4. The jack according to claim 3, characterized in that: The fixed pulley assembly (5) comprises a fixed frame (51), the fixed frame (51) is arranged inside the roller movable groove (24), and a fixed pulley (52) is arranged inside the fixed frame (51).

5. The jack according to claim 4, characterized in that: A threaded column (53) is provided on the upper surface of the fixing frame (51); the threaded column (53) passes through the through hole (27) and is connected to the mounting shell (2) via a nut.

6. The jack according to claim 5, characterized in that: The movable pulley group (6) comprises a movable frame (61), the movable frame (61) is arranged inside the roller movable groove (24), a movable pulley (62) is arranged inside the movable frame (61), and a movable tooth plate (63) is arranged on a side of the movable frame (61) close to the transmission gear (3), and the movable tooth plate (63) and the transmission gear (3) are meshed with each other.

7. The jack according to claim 6, characterized in that: The pedal mechanism (7) comprises a movable column (71), the movable column (71) being arranged inside the pressing groove (23), a pedal (73) penetrating the pressing groove (23) being arranged on one side of the movable column (71), a hinge block (72) being arranged at the top end of the movable column (71), and a return spring (74) being arranged between the movable column (71) and the mounting shell (2).

8. The jack according to claim 7, characterized in that: One end of the rope (42) is arranged inside the hinge block (72) and contacts the movable pulley (62) and the fixed pulley (52) in sequence.

9. The jack according to claim 2, characterized in that: The vertical movable block (8) comprises a vertical column (82), the vertical column (82) is arranged inside the guide groove (25), and a vertical tooth plate (81) is arranged at the bottom end of the vertical column (82), and the vertical tooth plate (81) extends to the outside of the mounting shell (2) and is interconnected with the plunger of the jack body (1).

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