Portable jack device for automobile maintenance

Abstract

The invention discloses a portable jack device for automobile maintenance, which relates to the technical field of equipment maintenance, and comprises a movable base capable of moving and a jack assembly for lifting, and further comprises an adjustable contact mechanism capable of adjusting the size of a contact surface according to the weight of an object, the adjustable contact mechanism comprises a detection assembly used for judging the weight of an object, an auxiliary assembly used for being matched with the detection assembly for detection, a contact assembly used for adjusting the contact face and a resistance adjusting and controlling assembly, and the movable end of the jack assembly is in a hollow state. When the jack device is used, the actual contact area can be synchronously changed along with the weight change of an object, so that the contact force in unit area is maintained in a relatively appropriate range, and the possibility that the contact surface of the lifted object is possibly extruded and deformed is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment maintenance, and particularly to a portable jack device for vehicle maintenance. Background Art

[0002] A hydraulic jack, also known as an oil jack, is a jack that uses a plunger or a hydraulic cylinder as a rigid lifting member. A simple lifting device generally only has a lifting mechanism for lifting heavy objects. It has a simple structure, is light in weight, easy to carry, and convenient to move. During the process of vehicle maintenance, a jack is often used to lift and then remove internal components of the vehicle. For example, when disassembling the engine and other components (such as motors), the required resistance force is different at this time. (The jack actually provides a certain acting force on the surface of the engine, and this force overcomes the gravity of the engine to lift the engine. That is to say, during the process of using the jack to lift an object, the jack provides an acting force greater than the gravity of the object on the surface of the object. When removing some relatively precise parts, it is necessary to pay attention to whether the surface of the component deforms. The size of the end of the existing jack is fixed. According to the principle of acting force, when the contact area remains unchanged and the acting force is greater, the force received per unit area is greater, resulting in a greater likelihood of deformation on the surface of the object being acted upon.) Summary of the Invention

[0003] The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem of the overly single solution of the prior art. An embodiment of the present invention provides a portable jack device for vehicle maintenance to solve the technical problem that the size of the contact surface of the existing jack cannot be adjusted according to the magnitude of the contact force, resulting in an excessive force per unit area that may cause deformation of the object surface.

[0004] An embodiment of the present invention adopts the following technical solution: A portable jack device for vehicle maintenance includes a movable base that can be moved and a jack assembly for lifting, and further includes an adjustable contact mechanism that can adjust the contact surface size according to the weight of the object. The adjustable contact mechanism includes a detection component for judging the weight of the object, an auxiliary component for cooperating with the detection component for detection, a contact component for adjusting the contact surface, and a resistance control component. The movable end of the jack assembly is in a hollow state.

[0005] Furthermore, the detection assembly includes a first hydraulic telescopic rod, the movable end and the fixed end of the first hydraulic telescopic rod are respectively connected to the movable end and the fixed end of the jack assembly, an auxiliary hydraulic telescopic rod is arranged beside the first hydraulic telescopic rod, the first hydraulic telescopic rod and the liquid storage telescopic rod are connected by a connecting pipe, and an electric control valve is arranged on the connecting pipe, and a first connecting pipe is arranged on the fixed end of the first hydraulic telescopic rod.

[0006] Furthermore, the resistance control component includes a detection box, a power supply box is arranged next to the detection box, a counterweight block is arranged inside the detection box, an adjustable electromagnetic resistance block is arranged between the top of the counterweight block and the top of the detection box, a sliding contact adjustment block is arranged next to the matching block, and the sliding contact adjustment block and the power supply box are electrically connected.

[0007] Further, the auxiliary component includes an active sleeve block, a return spring is arranged between the active sleeve block and the active end of the jack assembly, the active end detection box of the jack assembly is connected by a second connecting pipe, a mounting frame is arranged in the active sleeve block, an adjusting screw is rotatably inserted into the connecting frame, an arc-shaped telescopic rod is also arranged between the adjusting screw and the connecting frame, a connecting frame is arranged on the outer side of the active sleeve block, an adjustable hydraulic bag is arranged at the lower end of the connecting frame, the upper end of the adjustable hydraulic bag is connected to the active end of the jack assembly, the adjustable hydraulic bag and the arc-shaped telescopic rod are connected by a third connecting pipe, an electromagnetic reversing valve is arranged on the third connecting pipe, a through groove for the third connecting pipe to pass through is arranged on the active end of the jack assembly, a top block is arranged on the adjusting screw, and the top block is located in the active sleeve block, the top block and the active sleeve block are limited by a guide limit block, and a contact detector is arranged at the bottom end of the gap between the active sleeve block and the top block.

[0008] Furthermore, the cross section of the movable sleeve block is I-shaped, and the cross section of the connecting frame is U-shaped.

[0009] Furthermore, the contact assembly includes a resistance block, the resistance block is connected to the top block, a spiral block is arranged outside the resistance block, a contact block is arranged inside the spiral block, and a deformation block is arranged inside the contact block.

[0010] Furthermore, the cross section of the spiral block is a flat upper surface and an arc-shaped lower surface, and the contact block is made of elastic metal material.

[0011] Compared with the prior art, the beneficial effects of the present invention are: First, during the use of the jack device, since its contact surface adopts an adjustable contact mechanism, which can change synchronously with the change in the weight of the object during use, ensuring that the force received per unit area of the object is maintained within a certain range during use. Compared with the existing jack devices (the size of the contact surface of the existing jack devices is constant, but the applicable range of a jack is relatively wide, resulting in a relatively large change in the force per unit area. During the lifting process, the hardness of some contact surfaces may not be strong enough, leading to possible extrusion deformation at the contact position. Why not directly use the largest contact surface during use? Some objects to be lifted are small in size, while the contact surface is large, resulting in high requirements for the range of the contact surface, so it may lead to inapplicability), this jack device is relatively more practical; Second, during the extension of the adjustable contact mechanism, one problem that needs to be considered is that the contact surface may still not be a complete plane (such as a certain convex point. If it is a concave point, it has no impact on the extension). Since the adjustable contact mechanism extends upward rather than horizontally, it can still extend even with a convexity, ensuring that even with convex points, it will not affect the adjustment of the contact surface of the device, thus guaranteeing that the contact surface can be adjusted; In summary, during the use of the jack device, the actual contact area can change synchronously with the change in the weight of the object, maintaining the contact force per unit area within a relatively appropriate range and reducing the possibility of extrusion deformation that may occur on the contact surface of the object to be lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic diagram of the first perspective structure of the main body of the present invention; Figure 2 It is a schematic diagram of the first perspective structure of the jack of the present invention; Figure 3 It is a schematic diagram of the second perspective structure of the jack of the present invention; Figure 4 For the present invention Figure 3 The enlarged structure schematic diagram at position A; Figure 5It is a schematic diagram of the internal structure of the detection box of the present invention; Figure 6 It is a schematic diagram of the spiral block structure of the present invention; Figure 7 It is a schematic diagram of the movable structure of the movable set block of the present invention; Figure 8 It is a schematic cross-sectional structural diagram of the movable sleeve block of the present invention.

[0014] Reference numerals: 1. Movable base; 2. Adjustable contact mechanism; 21. First hydraulic telescopic rod; 22. Liquid storage telescopic rod; 2201. Electric control valve; 23. First connecting pipe; 24. Detection box; 25. Second connecting pipe; 26. Counterweight block; 27. Energy supply box; 28. Sliding contact adjustment block; 29. ​​Adjustable electromagnetic resistance block; 210. Reset spring; 211. Mounting frame; 212. Adjusting screw; 213. Contact detector; 214. Top block; 215. Guide limit block; 216. Connecting frame; 217. Arc telescopic rod; 218. Electromagnetic reversing valve; 219. Adjustable hydraulic bag; 220. Resistance block; 221. Contact block; 222. Spiral block; 223. Deformation block; 224. Movable sleeve block; 3. Jack assembly. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0017] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] As shown below in conjunction with Figures 1 to 8 An embodiment of the present invention provides a portable jack device for vehicle maintenance, including a movable base 1 that can be moved and a jack assembly 3 for lifting, and further including an adjustable contact mechanism 2 that can adjust the contact surface size according to the weight of an object. The adjustable contact mechanism 2 includes a detection component for judging the weight of the object, an auxiliary component for cooperating with the detection component for detection, a contact component for adjusting the contact surface, and a resistance control component. The movable end of the jack assembly 3 is in a hollow state.

[0021] During the use of this jack device, the actual contact area can change synchronously with the weight of the object, so that the contact force per unit area is maintained within a relatively appropriate range, reducing the possibility of extrusion deformation that may occur on the contact surface of the object to be lifted.

[0022] Specifically, the detection component includes a first hydraulic telescopic rod 21. The movable end and the fixed end of the first hydraulic telescopic rod 21 are respectively connected to the movable end and the fixed end of the jack assembly 3. An auxiliary hydraulic telescopic rod is arranged beside the first hydraulic telescopic rod 21. The first hydraulic telescopic rod 21 and the liquid storage telescopic rod 22 are connected through a communication pipe, and an electric control valve 2201 is arranged on the connection pipe. A first connection pipe 23 is arranged on the fixed end of the first hydraulic telescopic rod 21.

[0023] Specifically, the resistance control component includes a detection box 24. An energy supply box 27 is arranged beside the detection box 24. A counterweight 26 is arranged in the detection box 24. An adjustable electromagnetic resistance block 29 is arranged between the top of the counterweight 26 and the inner top of the detection box 24. A sliding contact type adjustment block 28 is arranged beside the cooperation block. The sliding contact type adjustment block 28 and the energy supply box 27 are electrically connected.

[0024] Specifically, the auxiliary component includes a movable sleeve block 224, a return spring 210 is arranged between the movable sleeve block 224 and the movable end of the jack assembly 3, the movable end detection box 24 of the jack assembly 3 is connected by a second connecting pipe 25, a mounting frame 211 is arranged inside the movable sleeve block 224, an adjusting screw 212 is rotatably inserted into the connecting frame 216, an arc-shaped telescopic rod 217 is also arranged between the adjusting screw 212 and the connecting frame 216, a connecting frame 216 is arranged outside the movable sleeve block 224, an adjustable hydraulic bag 219 is arranged at the lower end of the connecting frame 216, and the adjustable The upper end of the hydraulic bag 219 is connected to the movable end of the jack assembly 3, and the adjustable hydraulic bag 219 is connected to the arc telescopic rod 217 through a third connecting pipe. The third connecting pipe is provided with an electromagnetic reversing valve 218. The movable end of the jack assembly 3 is provided with a through groove for the third connecting pipe to pass through. A top block 214 is provided on the adjusting screw 212, and the top block 214 is located in the movable sleeve block 224. The top block 214 and the movable sleeve block 224 are limited by a guide limit block 215, and a contact detector 213 is provided at the lower end of the gap between the movable sleeve block 224 and the top block 214.

[0025] Specifically, the cross section of the movable sleeve block 224 is I-shaped, and the cross section of the connecting frame 216 is U-shaped.

[0026] Since the cross section of the movable sleeve block 224 is in an I-shape, the movable sleeve block 224 can move in a relative position.

[0027] Specifically, the contact assembly includes a resistance block 220 , which is connected to the top block 214 . A spiral block 222 is disposed outside the resistance block 220 . A contact block 221 is disposed inside the spiral block 222 . A deformation block 223 is disposed inside the contact block 221 .

[0028] Specifically, the cross section of the spiral block 221 is a flat upper surface and an arc-shaped lower surface, and the contact block 221 is made of elastic metal material.

[0029] During operation, since the cross-section of the spiral block 222 is flat on the top and curved on the bottom, when adjusting, the contact surface is flat at this time to ensure that it can contact the lifted object, and the curved bottom is so that when the contact block 221 extends and deforms upward, the spiral block 221 can be gradually folded, so that the contact surface area can be gradually increased, thereby achieving the effect of adjusting the contact surface.

[0030] Working principle: When in use, first move the device through the movable base 1 to the bottom of the object to be lifted, then press the pressing end of the jack assembly 3, and the movable end of the jack assembly 3 extends. Since the movable end of the jack assembly 3 is connected to the contact block 221 in the adjustable contact mechanism 2, the adjustable contact mechanism 2 rises. At this time, the electric control valve 2201 is opened. During the movement of the movable end, the movable end of the first hydraulic telescopic rod 21 is driven to rise synchronously, thereby squeezing the first hydraulic telescopic rod 21 so that the internal liquid is squeezed into the liquid storage telescopic rod 22. When the resistance block 220 resists the object and is ready to start lifting, the electric control valve 2201 is closed. Before lifting, the lifting force is gradually increased. At this time, the movable sleeve block 224 will gradually move downward under the action of the squeezing force (because During the lifting process, the movable sleeve 224 and the movable end of the jack are movably connected. At this time, the resistance between the movable sleeve 224 and the jack is not enough to lift the object, but the movable end of the jack is still rising, which indirectly indicates that the movable sleeve 224 and the jack are shrinking. The movable sleeve 224 shrinks and squeezes the internal liquid, which enters the detection box 24 through the second connecting pipe 25, causing the counterweight block 26 in the detection box 24 to rise. During the rising process of the counterweight block 26, the position of the sliding contact adjustment block 28 and the contact track is constantly changing (similar to a knob switch, adjusting the size), thereby increasing the resistance of the adjustable electromagnetic resistance block 29. That is to say, the more the movable sleeve 224 moves downward, the greater the resistance it encounters, until the resistance of the movable sleeve 224 can lift the object. At the same time, when the movable sleeve block 224 is deformed in position, the resistance block 220 will rise synchronously with the movable end of the jack assembly 3, and when the resistance block 220 rises, it will resist the deformation block 223 to deform outward (that is, expand obliquely upward). At this time, when the deformation block 223 expands, it will resist the spiral block 222 to make it rise gradually. The rising spiral block 222 contacts the surface of the object, thereby achieving the effect of adjusting the contact surface. However, at this time, the spiral block 222 is an auxiliary contact, and the actual weight of the object still falls on the contact block 221. For this reason, the contact between the contact block 221 and the movable sleeve block 224 needs to be released (that is, the movable sleeve block 224 moves downward at this time, and the weight of the object acts on the spiral block 222); During the retraction of the movable sleeve block 224, the adjustable hydraulic bladder 219 will be driven by the connecting frame 216 to expand, gradually increasing the internal space. At this time, the liquid in the connecting frame 216 moves into the adjustable hydraulic bladder 219. When the movable sleeve block 224 can no longer expand (i.e., the downward resistance of the movable sleeve block 224 is greater than the lifting force at this time), it will still rise a certain position. The electromagnetic directional valve 218 opens, and the liquid entering the adjustable hydraulic bladder 219 enters the arc-shaped telescopic rod 217, causing the arc-shaped telescopic rod 217 to expand, thereby driving the adjustment screw 212 to rotate. The rotation of the adjustment screw 212 drives the top block 214 to descend. At this time, the acting force of the object acts on the entire spiral block 222, thus completing the switching of the acting force. During retraction, the liquid will be sucked back to complete the reset.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable jack device for automobile maintenance, comprising a movable base (1) and a jack assembly (3) for lifting, characterized in that; It also includes an adjustable contact mechanism (2) capable of adjusting the size of the contact surface according to the weight of the object, the adjustable contact mechanism (2) including a detection component for determining the weight of the object, an auxiliary component for cooperating with the detection component for detection, and a contact component and a resistance regulating component for adjusting the contact surface, and the movable end of the jack component (3) is in a hollow state.

2. A portable jack device for automobile maintenance according to claim 1, characterized in that; The detection assembly comprises a first hydraulic telescopic rod (21), the movable end and the fixed end of the first hydraulic telescopic rod (21) being respectively connected to the movable end and the fixed end of the jack assembly (3), an auxiliary hydraulic telescopic rod being arranged beside the first hydraulic telescopic rod (21), the first hydraulic telescopic rod (21) and the liquid storage telescopic rod (22) being connected via a connecting pipe, and an electric control valve (2201) being arranged on the connecting pipe, and a first connecting pipe (23) being arranged on the fixed end of the first hydraulic telescopic rod (21).

3. A portable jack device for automobile maintenance according to claim 1, characterized in that; The resistance regulating assembly comprises a detection box (24), an energy supply box (27) is arranged beside the detection box (24), a counterweight block (26) is arranged inside the detection box (24), an adjustable electromagnetic resistance block (29) is arranged between the top of the counterweight block (26) and the top of the detection box (24), a sliding contact type regulating block (28) is arranged beside the matching block, and the sliding contact type regulating block (28) and the energy supply box (27) are electrically connected.

4. A portable jack device for automobile maintenance according to claim 1, characterized in that; The auxiliary component comprises a movable sleeve (224), a return spring (210) is arranged between the movable sleeve (224) and the movable end of the jack assembly (3), the movable end detection box (24) of the jack assembly (3) is connected via a second connecting pipe (25), a mounting frame (211) is arranged inside the movable sleeve (224), an adjusting screw (212) is rotatably inserted into the mounting frame (211), an arc-shaped telescopic rod (217) is further arranged between the adjusting screw (212) and the connecting frame (216), a connecting frame (216) is arranged outside the movable sleeve (224), an adjustable hydraulic bag (219) is arranged at the lower end of the connecting frame (216), and the adjustable The upper end of the hydraulic bag (219) is connected to the movable end of the jack assembly (3); the adjustable hydraulic bag (219) is connected to the arc-shaped telescopic rod (217) via a third connecting pipe; the third connecting pipe is provided with an electromagnetic reversing valve (218); the movable end of the jack assembly (3) is provided with a through groove through which the third connecting pipe can pass; the adjusting screw (212) is provided with a top block (214); the top block (214) is located in the movable sleeve block (224); the top block (214) and the movable sleeve block (224) are limited by a guide limit block (215); and a contact detector (213) is provided at the bottom end of the gap between the movable sleeve block (224) and the top block (214).

5. A portable jack device for automobile maintenance according to claim 4, characterized in that; The cross section of the movable sleeve block (224) is in an I-shape, and the cross section of the connecting frame (216) is in a U-shape.

6. A portable jack device for automobile maintenance according to claim 1, characterized in that; The contact assembly comprises a resistance block (220), the resistance block (220) being connected to the top block (214), a spiral block (222) being arranged outside the resistance block (220), a contact block (221) being arranged outside and inside the spiral block (222), and a deformation block (223) being arranged inside the contact block (221).

7. A portable jack device for automobile maintenance according to claim 6, characterized in that; The cross section of the spiral block (222) is a flat upper surface and an arc-shaped lower surface, and the contact block (221) is made of elastic metal material.

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