Foldable jack suitable for narrow space and control method

Abstract

The invention belongs to the technical field of jack devices, and discloses a foldable jack suitable for a narrow space and a control method.The foldable jack comprises a jack assembly, the jack assembly comprises a base, a driving part is fixedly connected to the upper end of the base, a rocker is inserted into the operation end of the driving part, and a set of connecting pipes are fixedly connected to the side end of the driving part; the jack assembly is matched with the linkage wedge-shaped block assembly, a hydraulic push rod in the jack assembly extends to push a wedge-shaped ejector block to move, the wedge-shaped ejector block drives a horizontal sliding block to slide along a horizontal sliding groove, and then a wedge-shaped clamping block is pushed to be synchronously pushed, so that linkage displacement of the jack assembly and the linkage wedge-shaped block assembly is achieved; the cushion block can be synchronously pushed or withdrawn along with the jack without manual auxiliary placement and adjustment, flexible switching of the two operation modes can be achieved, different scenes of single-point short-term jacking and multi-point long-term supporting are adapted, and the adaptability and the utilization rate of equipment are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of jack devices, specifically a foldable jack suitable for narrow spaces and its control method. Background Technology

[0002] A jack is a commonly used lifting tool, widely applied in various scenarios such as industrial installation, bridge maintenance, vehicle repair, and disaster relief. Its core function is to perform short-distance lifting, leveling, or supporting operations on heavy objects. Most existing jacks are designed based on hydraulic or screw drive principles, primarily consisting of a base, drive unit, power transmission structure, push rod, and lifting block. Some are equipped with a manual crank, which, when manually cranked, drives the internal transmission structure, generating power that is transmitted to the push rod via the power transmission structure. This power then pushes the lifting block axially, achieving the lifting and supporting of the target object. With its simple structure and high load-bearing capacity, it is one of the core pieces of equipment in industrial production and emergency operations. For example, a wedge-shaped hydraulic jack with publication number CN119750427A, specifically relating to the field of jack technology, includes a base, on which a lifting assembly is provided. The lifting assembly includes a reinforced sealing transfer frame located in the middle of the base, and a guide cylinder is provided on one side of the reinforced sealing transfer frame. The first and second reinforced conveying pipes are blocked by the displacement of the sealing baffle, which can effectively prevent the backflow of oil during conveying and ensure the stability of the reinforced triangular lifting block when supporting the workpiece.

[0003] While the above solution can effectively prevent the backflow of oil during the use of jacks, in lifting operations in narrow spaces, existing jacks are mostly single lifting structures that lack a pad assembly that is synchronized with them. The matching pads are independent and separate without a dedicated linkage transmission and guiding structure, which means that the pads need to be placed and adjusted manually. They cannot move or retract synchronously with the jacks, resulting in low positioning accuracy, easy displacement and misalignment, low work efficiency, and limited manual operation in narrow spaces. Summary of the Invention

[0004] To address the problem mentioned in the background art that existing jacks are mostly single lifting structures and lack padding components that are synchronized with them, this invention provides a foldable jack and control method suitable for narrow spaces.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a foldable jack suitable for narrow spaces, comprising a jack assembly, the jack assembly including a base, a driving component fixedly connected to the upper end of the base, a rocker arm inserted into the operating end of the driving component, a set of connecting pipes fixedly connected to the side end of the driving component, a hydraulic push rod connected to the end of the connecting pipes away from the driving component, and a wedge-shaped top block fixedly connected to the output end of the hydraulic push rod for horizontally pushing and lifting objects, further comprising: A linkage wedge block assembly is provided on the side of the jack assembly. The linkage wedge block assembly includes transverse telescopic sleeves symmetrically installed on both sides of the wedge top block. The movable end of the transverse telescopic sleeve is fixedly connected to a wedge-shaped locking block that can be pushed forward in conjunction with the wedge top block.

[0006] Preferably, it further includes: a detachable connection component, which is installed at the connection between the jack component and the linkage wedge block component. The detachable connection component includes horizontal sliding blocks fixedly connected to both sides of the wedge block. The upper end of the horizontal sliding block is fixedly connected to a protruding lug. The fixed end of the transverse telescopic sleeve is fixedly connected to a sleeve base.

[0007] Preferably, the sleeve base and the protruding lug are respectively provided with a plurality of coaxially connected threaded holes, and a locking screw is threaded into the threaded holes. The locking screw is used to realize the detachable fixing of the sleeve base and the protruding lug.

[0008] Preferably, the base has symmetrical horizontal sliding grooves with guiding function on both sides, and the horizontal sliding block slides in cooperation with the corresponding horizontal sliding groove.

[0009] Preferably, it further includes: an anti-loss nut assembly, which is installed on the locking end of the detachable connection assembly. The anti-loss nut assembly includes a hollow ring block fixedly connected to the side end of the protruding lug block. The inner side wall of the hollow ring block is rotatably connected to a plurality of folding linkage rods, which are distributed in a ring at equal intervals. The rotation position of the folding linkage rods is hinged to a rotating shaft.

[0010] Preferably, the end of the folding linkage rod away from the hollow ring block is rotatably connected to a nut with a locking function, and the nut is threadedly connected to the end of the locking screw away from the base of the sleeve rod.

[0011] Preferably, the inner wall of the hollow ring block is provided with an annular groove with a limiting function, and the end of the folding linkage rod near the hollow ring block is fixedly connected to a circumferential bottom block, which is slidably connected to the annular groove.

[0012] Preferably, it further includes: an auxiliary propulsion component, which is installed at the lower end of the wedge-shaped block. The auxiliary propulsion component includes a strip-shaped slot formed at the bottom of the wedge-shaped block. Multiple rolling wheels are rotatably connected between the left and right inner sidewalls of the strip-shaped slot to reduce the friction during the displacement of the wedge-shaped block. The multiple rolling wheels are horizontally and equidistantly distributed along the length direction of the strip-shaped slot.

[0013] Preferably, the upper end of the base is rotatably connected to a cover plate located above the wedge-shaped top block, and the bearing surface of the wedge-shaped block is fixedly connected with a plurality of equidistant anti-slip protrusions.

[0014] This application also proposes a control method for a foldable jack suitable for confined spaces, the control method being as follows: S1: Device deployment: Place the base in the target position, rotate the cover plate to the open state, pass the locking screw through the threaded hole of the sleeve base and the protruding lug, and lock it with the anti-loss nut assembly to complete the assembly and fixation of the jack assembly and the linkage wedge block assembly; S2: Power drive, rocking the rocker arm generates power to the drive component, which is transmitted to the hydraulic push rod through the connecting pipe. The hydraulic push rod extends and pushes the wedge-shaped top block to move, which in turn drives the horizontal sliding block to slide and guide along the horizontal sliding groove. S3: Synchronous lifting, the horizontal sliding block drives the horizontal telescopic sleeve to extend through the connecting piece, pushes the wedge-shaped block to be pushed forward by the rolling wheel, and synchronously inserts into the target gap. The anti-slip convex strip fits the contact surface to achieve stable support. S4: Separate storage / retention, with two operating modes; Mode 1: Reverse rocker arm, hydraulic push rod retracts to reset all components, wedge block exits the gap, rotate cover plate to fold and store, reducing volume for easy carrying, at which time the entire equipment retracts and resets; Mode 2: After the wedge block provides stable support, unlock and engage screw to separate the two components, wedge block retains to bear load, jack component is transferred and reused, wedge block can be separated and retained for reuse.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a jack assembly and a linkage wedge block assembly. The hydraulic push rod in the jack assembly extends to push the wedge block, which in turn drives a horizontal sliding block to slide along a horizontal sliding groove. This, in turn, drives the lateral telescopic sleeve of the linkage wedge block assembly to extend via a detachable connecting component, thus pushing the wedge block forward synchronously. This achieves the linkage displacement of the jack assembly and the linkage wedge block assembly, ensuring that the lifting and lateral pushing actions are coordinated and consistent. The pad block does not require manual assistance in placement and adjustment and can move forward or backward synchronously with the jack.

[0016] This invention features a detachable connection component and an anti-loss nut component that work together. The locking screw in the detachable connection component passes through the threaded hole of the sleeve base and the protruding lug, and is locked in place with the nut of the anti-loss nut component. When unlocking, rotating the nut allows the two components to be separated, enabling flexible switching between two operation modes: overall retraction and reset, and split-and-retain reuse. This adapts to different scenarios, such as single-point short-term lifting and multi-point long-term support, improving the equipment's adaptability and utilization.

[0017] This invention converts sliding friction into rolling friction by setting a rolling wheel in the slotted section of the auxiliary propulsion component to contact the contact surface, thereby reducing propulsion resistance. This allows the wedge-shaped block to be quickly and smoothly inserted into the target gap. Furthermore, the anti-slip protrusions on the bearing surface of the wedge-shaped block are in close contact with the target contact surface, increasing contact friction and improving support stability. This effectively prevents slippage and detachment during the lifting process, ensuring safe and reliable operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the jack assembly of the present invention; Figure 2 This is a schematic diagram of the propulsion orientation structure of the wedge-shaped top block of the present invention; Figure 3 This is a schematic diagram of the linkage wedge block assembly of the present invention installed on the side of the jack assembly; Figure 4 For the present invention Figure 3 Enlarged structural diagram of the central linkage wedge block assembly; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure with partial truncation at point A in the middle; Figure 6 This is a schematic diagram of the wedge-shaped card block structure of the present invention; Figure 7 This is a schematic diagram of the detachable connection component structure of the present invention; Figure 8 This is a schematic diagram of the anti-loss nut assembly structure of the present invention; Figure 9 This is a schematic diagram of the auxiliary propulsion component structure of the present invention; Figure 10 For the present invention Figure 9 A magnified schematic diagram of the partial truncation at point B.

[0019] In the picture: 1. Jack assembly; 10. Base; 11. Drive unit; 12. Rocker arm; 13. Connecting pipe; 14. Hydraulic push rod; 15. Wedge-shaped top block; 16. Cover plate; 2. Linkage wedge block assembly; 20. Lateral telescopic sleeve rod; 21. Wedge-shaped locking block; 22. Anti-slip convex strip; 3. Detachable connection assembly; 30. Horizontal sliding block; 31. Protruding ear block; 32. Locking screw; 33. Sleeve rod base; 34. Threaded hole; 35. Horizontal sliding groove; 4. Anti-loss nut assembly; 40. Hollow ring block; 41. Circulating bottom block; 42. Folding linkage rod; 43. Nut; 44. Annular sliding groove; 45. Rotating shaft; 5. Auxiliary propulsion assembly; 51. Strip slot; 52. Rolling wheel. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 10 As shown, the present invention provides a foldable jack suitable for narrow spaces, including a jack assembly 1. The jack assembly 1 includes a base 10, and a drive component 11 is fixedly connected to the upper end of the base 10. The drive component 11 is a manual hydraulic pump, the pump body of which is fixed to the base 10. A rocker arm 12 is inserted into the operating end of the drive component 11 and is inserted into the operating valve of the pump body. A set of connecting pipes 13 is fixedly connected to the side end of the drive component 11. The end of the connecting pipes 13 away from the drive component 11 is connected to a hydraulic push rod 14. The output end of 4 is fixedly connected to a wedge-shaped top block 15 for horizontally pushing and lifting objects, and also includes a linkage wedge block assembly 2. The linkage wedge block assembly 2 is set on the side end of the jack assembly 1. The linkage wedge block assembly 2 includes a transverse telescopic sleeve 20 symmetrically installed on both sides of the wedge-shaped top block 15. The transverse telescopic sleeve 20 is a multi-stage sleeve structure, including a fixed sleeve and a multi-stage sliding sleeve. The fixed sleeve is fixed to the sleeve base 33. The movable end of the transverse telescopic sleeve 20 is fixedly connected to a wedge-shaped locking block 21 that can be pushed forward in conjunction with the wedge-shaped top block 15.

[0022] The above scheme is adopted: the wedge-shaped top block 15 adopts an inclined end face design, which can convert the axial thrust of the hydraulic push rod 14 into vertical lifting force and horizontal lateral thrust. In conjunction with the symmetrically arranged transverse telescopic sleeves 20 on both sides, the synchronous action of the two modes of lifting and lateral thrust can be realized. The transverse telescopic sleeves 20 adopt a multi-level nested structure, which can adaptively adjust the extension stroke according to the gap width to adapt to different lifting scenarios. The wedge-shaped locking block 21 and the transverse telescopic sleeves 20 are fixed as one piece to ensure lossless power transmission. Its wedge-shaped structure is compatible with the wedge-shaped top block 15.

[0023] like Figures 1 to 10 As shown, it also includes a detachable connection component 3, which is installed at the connection between the jack component 1 and the linkage wedge block component 2. The detachable connection component 3 includes horizontal sliding blocks 30 fixedly connected to both sides of the wedge block 15. The upper end of the horizontal sliding block 30 is fixedly connected to a protruding lug 31. The fixed end of the transverse telescopic sleeve 20 is fixedly connected to a sleeve base 33. Multiple coaxially connected threaded holes 34 are respectively opened on the sleeve base 33 and the protruding lug 31. The threaded holes 34 are internally threaded with locking screws 32. The locking screws 32 are used to realize the detachable fixing of the sleeve base 33 and the protruding lug 31. The two sides of the base 10 are symmetrically provided with horizontal sliding grooves 35 with guiding function. The horizontal sliding block 30 slides in cooperation with the horizontal sliding groove 35 on the corresponding side.

[0024] The above scheme is adopted: the horizontal sliding block 30 and the horizontal sliding groove 35 adopt a clearance fit design, and the movement trajectory of the wedge-shaped top block 15 is rigidly limited to prevent it from shifting left and right or swaying up and down during the lifting process, thus ensuring transmission accuracy. The locking screw 32 is made of high-strength alloy steel and the surface is treated with anti-rust. The two components can be disassembled and assembled without special tools, which improves the flexibility of operation.

[0025] like Figures 1 to 10 As shown, it also includes an anti-loss nut assembly 4, which is installed on the locking end of the detachable connection assembly 3. The anti-loss nut assembly 4 includes a hollow ring block 40 fixedly connected to the side end of the protruding lug 31. Multiple folding linkage rods 42 are rotatably connected to the inner wall of the hollow ring block 40. The multiple folding linkage rods 42 are distributed in a ring at equal intervals. The rotation position of the folding linkage rod 42 is hinged to a rotating shaft 45. The end of the folding linkage rod 42 away from the hollow ring block 40 is rotatably connected to a nut 43 with a locking function. The nut 43 is threadedly connected to the end of the locking screw 32 away from the sleeve base 33. The inner wall of the hollow ring block 40 is provided with an annular sliding groove 44 with a limiting function. The end of the folding linkage rod 42 near the hollow ring block 40 is fixedly connected to a circumferential bottom block 41. The circumferential bottom block 41 is slidably connected to the annular sliding groove 44.

[0026] The above solution solves the problem of traditional locking nuts being easily lost or detached. Multiple folding linkage rods 42 are folded and rotated through the pivot 45, which can be adapted to different locking positions of the nut 43. The sliding cooperation between the circumferential bottom block 41 and the annular slide groove 44 provides circumferential rotation space for the folding linkage rods 42, ensuring that the nut 43 can be smoothly rotated to lock or unlock, forming a rigid limit on the nut 43 to prevent it from completely detaching from the locking screw 32, thus realizing the integrated anti-loss design of the nut 43 and adapting to the needs of use in narrow spaces.

[0027] like Figures 1 to 10As shown, it also includes an auxiliary propulsion component 5, which is installed at the lower end of the wedge-shaped block 21. The auxiliary propulsion component 5 includes a strip-shaped slot 51 opened at the bottom of the wedge-shaped block 21. Multiple rolling wheels 52 are rotatably connected between the left and right inner sidewalls of the strip-shaped slot 51 to reduce the friction during the displacement of the wedge-shaped block 21. The multiple rolling wheels 52 are horizontally and equidistantly distributed along the length direction of the strip-shaped slot 51. A cover plate 16 located above the wedge-shaped top block 15 is rotatably connected to the upper end of the base 10. Multiple anti-slip protrusions 22 are fixedly connected to the bearing surface of the wedge-shaped block 21.

[0028] The above scheme is adopted: the rolling wheel 52 is made of high hardness rubber material, the anti-slip ridge 22 has a raised structure, and forms an interlocking fit with the contact surface of the target object, which can increase the friction coefficient, effectively prevent slippage and movement during the lifting process, and improve the reliability of the support. The cover plate 16 adopts a flip-up design, which can protect the wedge-shaped top block 15 when not in operation.

[0029] This application also proposes a control method for a foldable jack suitable for confined spaces, the control method being as follows: S1: Device deployment: Place the base 10 in the target position, rotate the cover plate 16 to the open state, pass the locking screw 32 through the threaded hole 34 of the sleeve base 33 and the protruding ear block 31, and lock it with the anti-loss nut assembly 4 to complete the assembly and fixation of the jack assembly 1 and the linkage wedge block assembly 2. S2: Power drive, rocking the rocker arm 12 causes the drive component 11 to generate power, which is transmitted to the hydraulic push rod 14 through the connecting pipe 13. The hydraulic push rod 14 extends and pushes the wedge-shaped top block 15 to move, which drives the horizontal sliding block 30 to slide and guide along the horizontal sliding groove 35. S3: Synchronous lifting, the horizontal sliding block 30 drives the horizontal telescopic sleeve 20 to extend through the connector, pushes the wedge-shaped block 21 to be pushed forward by the rolling wheel 52, and synchronously inserts into the target gap. The anti-slip convex strip 22 fits the contact surface to achieve stable support. S4: Separate storage / retention, with two operating modes; Mode 1: Reverse rocker 12, hydraulic push rod 14 retracts to reset all components, wedge block 21 exits the gap, rotate cover plate 16 to fold and store, reducing volume for easy carrying, at which time the entire equipment retracts and resets; Mode 2: After wedge block 21 provides stable support, unlock and lock screw 32 to separate the two components, wedge block 21 remains in place to bear the load, jack component 1 is transferred and reused, and wedge block 21 can be separated, retained, and reused.

[0030] Working principle and usage process of this invention: In applications where a jack is used for lifting operations, and there is only a narrow gap with limited height and lateral operating space between the object to be lifted and the supporting surface below, the base 10 can be placed stably on the supporting surface of the target lifting area first, ensuring that the base 10 fits tightly against the contact surface to guarantee the stability of the overall operation. Then, rotate the cover plate 16 from above the wedge-shaped top block 15 to the open position to prevent the cover plate 16 from interfering with the movement of subsequent lifting components. Next, align the sleeve base 33 of the linkage wedge block assembly 2 with the protruding lug 31 of the jack assembly 1, so that the threaded holes 34 on both are coaxial. Connect the locking screw 32 through the corresponding threaded holes 34 in sequence, and then rotate the nut 43 in the anti-loss nut assembly 4 to make the nut 43 engage with the locking screw 32 and lock it. During this process, the nut 43 drives the folding linkage rod 42 to rotate around the rotating shaft 45. The annular bottom block 41 at the end of the folding linkage rod 42 slides along the annular groove 44 on the inner side of the hollow ring block 40, which not only ensures the smoothness of the locking operation, but also prevents the nut 43 from falling off and being lost through the limiting effect of the folding linkage rod 42. Finally, the detachable and fixed assembly of the jack assembly 1 and the linkage wedge block assembly 2 is completed, laying the structural foundation for subsequent jacking operations. During the power drive phase, the operator cranks the rocker arm 12. The rocker arm 12, through its insertion and engagement with the drive component 11, drives the internal transmission structure of the drive component 11 to operate, causing the drive component 11 to generate hydraulic power. This hydraulic power is stably transmitted to the hydraulic push rod 14 via the connecting pipe 13, driving the output end of the hydraulic push rod 14 to extend axially. The extension of the hydraulic push rod 14 directly pushes the wedge-shaped top block 15 to move upward. Since horizontal sliding blocks 30 are fixedly connected to both sides of the wedge-shaped top block 15, and the horizontal sliding blocks 30 slide in engagement with the horizontal sliding grooves 35 opened on both sides of the base 10, the upward movement of the wedge-shaped top block 15 will drive the horizontal sliding blocks 30 to slide horizontally synchronously along the horizontal sliding grooves 35. The horizontal sliding grooves 35 can accurately guide the movement trajectory of the horizontal sliding blocks 30, effectively avoiding problems such as offset and jamming of the wedge-shaped top block 15 during movement, ensuring the stability of power transmission and the coordination of component movement. During the synchronous lifting phase, as the horizontal sliding block 30 slides horizontally, the protruding lug 31 fixed on it, in conjunction with the locking screw 32 and the fixed connection with the sleeve base 33, drives the sleeve base 33 to move horizontally synchronously. The movement of the sleeve base 33 drives the transverse telescopic sleeve 20 to extend horizontally. The movable end of the transverse telescopic sleeve 20 pushes the wedge-shaped locking block 21 to advance horizontally towards the target lifting gap. At this time, the multiple rolling wheels 52 in the strip-shaped slot 51 at the bottom of the wedge-shaped locking block 21 contact the contact surface, converting the sliding friction between the wedge-shaped locking block 21 and the contact surface into rolling friction. This significantly reduces the frictional resistance during the advancement of the wedge-shaped block 21, improves the smoothness of the advancement action, and ensures that the wedge-shaped block 21 can quickly and smoothly approach the target gap. As the wedge-shaped top block 15 continues to rise, the wedge-shaped blocks 21 on both sides are simultaneously inserted into both sides of the target gap. The anti-slip convex strips 22 on the bearing surface of the wedge-shaped block 21 are in close contact with the contact surface of the target object. By increasing the friction coefficient of the contact surface, it effectively prevents the risk of slippage or falling off during the lifting process, and achieves stable lifting and reliable support for the target object, meeting the lifting operation requirements in narrow spaces. During the separation, storage, and retention phases, different operating modes can be selected according to operational needs. The first mode is the overall retraction and reset mode, which is suitable for scenarios where long-term support is not required after single-point lifting operations are completed. In this mode, the rocker arm 12 is rocked in the opposite direction, the drive component 11 rotates in the opposite direction, the output end of the hydraulic push rod 14 retracts, and the wedge-shaped top block 15 is driven to reset downwards. The wedge-shaped top block 15 simultaneously drives the horizontal sliding block 30 to slide in the opposite direction along the horizontal sliding groove 35, and then drives the transverse telescopic sleeve rod 20 to retract through the sleeve rod base 33, pulling the wedge-shaped locking block 21 out of the target gap, completing the synchronous reset of all components. Finally, the cover plate 16 is rotated to rotate it above the wedge-shaped top block 15, realizing the folding and storage of the device, greatly reducing the overall volume, and making it easier to carry and store later. The second type is the split-and-retain reuse mode, which is suitable for scenarios where the target object needs to be lifted at multiple points or supported for a long time. After the wedge block 21 is inserted into the target gap and is stably supported by the anti-slip convex strip 22, the nut 43 is rotated to disengage it from the locking screw 32. After unlocking, the locking screw 32 is taken out from the threaded hole 34, and the jack assembly 1 and the linkage wedge block assembly 2 can be quickly split. After splitting, the wedge block 21 remains in the gap to continue bearing the load. The jack assembly 1 can be directly withdrawn and transferred to the next lifting point. After being reassembled with the spare linkage wedge block assembly 2, the operation can be carried out, which can improve the utilization rate of the equipment. After the overall operation is completed, the rocker arm 12 is rocked in the opposite direction, the hydraulic push rod 14 retracts and drives the wedge-shaped top block 15 to reset, the transverse telescopic sleeve 20 retracts simultaneously and pulls the wedge-shaped locking block 21 out of the target gap, and finally the cover plate 16 is rotated to the top of the wedge-shaped top block 15 to realize the folding and storage of the device, reduce the overall volume, and make it easy to carry and store.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foldable jack suitable for narrow spaces, comprising a jack assembly (1), the jack assembly (1) including a base (10), a drive member (11) fixedly connected to the upper end of the base (10), a rocker arm (12) inserted into the operating end of the drive member (11), a set of connecting pipes (13) fixedly connected to the side end of the drive member (11), a hydraulic push rod (14) connected to the end of the connecting pipes (13) away from the drive member (11), and a wedge-shaped top block (15) for horizontally pushing and lifting objects fixedly connected to the output end of the hydraulic push rod (14), characterized in that: Also includes: Linkage wedge block assembly (2), the linkage wedge block assembly (2) is set on the side end of the jack assembly (1), the linkage wedge block assembly (2) includes a transverse telescopic sleeve rod (20) symmetrically installed on both sides of the wedge top block (15), and the movable end of the transverse telescopic sleeve rod (20) is fixedly connected to a wedge-shaped locking block (21) that can be pushed forward in conjunction with the wedge top block (15).

2. The foldable jack suitable for confined spaces according to claim 1, characterized in that: Also includes: A detachable connection component (3) is installed at the connection between the jack component (1) and the linkage wedge block component (2). The detachable connection component (3) includes horizontal sliding blocks (30) fixedly connected to both sides of the wedge block (15). A protruding lug (31) is fixedly connected to the upper end of the horizontal sliding block (30). A sleeve base (33) is fixedly connected to the fixed end of the transverse telescopic sleeve (20).

3. The foldable jack suitable for confined spaces according to claim 2, characterized in that: The sleeve base (33) and the protruding lug (31) are respectively provided with multiple coaxially connected threaded holes (34), and the threaded holes (34) are internally threaded with locking screws (32). The locking screws (32) are used to realize the detachable fixing of the sleeve base (33) and the protruding lug (31).

4. The foldable jack suitable for confined spaces according to claim 3, characterized in that: The base (10) has symmetrical horizontal sliding grooves (35) with guiding function on both sides, and the horizontal sliding block (30) slides in cooperation with the corresponding horizontal sliding groove (35).

5. The foldable jack suitable for confined spaces according to claim 1, characterized in that: Also includes: The anti-loss nut assembly (4) is installed on the locking end of the detachable connection assembly (3). The anti-loss nut assembly (4) includes a hollow ring block (40) fixedly connected to the side end of the protruding lug (31). The inner side wall of the hollow ring block (40) is rotatably connected to a plurality of folding linkage rods (42). The plurality of folding linkage rods (42) are distributed in a ring at equal intervals. The rotation position of the folding linkage rods (42) is hinged to a rotating shaft (45).

6. The foldable jack suitable for confined spaces according to claim 5, characterized in that: The end of the folding linkage rod (42) away from the hollow ring block (40) is rotatably connected to a nut (43) with a locking function. The nut (43) is threadedly connected to the end of the locking screw (32) away from the sleeve base (33).

7. The foldable jack suitable for confined spaces according to claim 6, characterized in that: The inner wall of the hollow ring block (40) is provided with an annular groove (44) with a limiting function. The end of the folding linkage rod (42) near the hollow ring block (40) is fixedly connected to a rotating bottom block (41). The rotating bottom block (41) is slidably connected to the annular groove (44).

8. The foldable jack suitable for confined spaces according to claim 1, characterized in that: Also includes: An auxiliary propulsion component (5) is installed at the lower end of a wedge-shaped block (21). The auxiliary propulsion component (5) includes a strip-shaped slot (51) opened at the bottom of the wedge-shaped block (21). Multiple rolling wheels (52) are rotatably connected between the left and right inner sidewalls of the strip-shaped slot (51) to reduce the friction during the displacement of the wedge-shaped block (21). The multiple rolling wheels (52) are horizontally and equidistantly distributed along the length direction of the strip-shaped slot (51).

9. The foldable jack suitable for confined spaces according to claim 1, characterized in that: The upper end of the base (10) is rotatably connected to a cover plate (16) located above the wedge-shaped top block (15), and the bearing surface of the wedge-shaped block (21) is fixedly connected with a plurality of equidistant anti-slip protrusions (22).

10. A control method for a foldable jack suitable for confined spaces, applied to the foldable jack suitable for confined spaces as described in any one of claims 1-9, characterized in that: S1: Device deployment: Place the base (10) at the target position, rotate the cover plate (16) to the open state, pass the locking screw (32) through the threaded hole (34) of the sleeve base (33) and the protruding ear block (31), and lock it with the anti-loss nut assembly (4) to complete the assembly and fixation of the jack assembly (1) and the linkage wedge block assembly (2); S2: Power drive, rocking the rocker arm (12) causes the drive component (11) to generate power, which is transmitted to the hydraulic push rod (14) through the connecting pipe (13). The hydraulic push rod (14) extends and pushes the wedge-shaped top block (15) to move, which drives the horizontal sliding block (30) to slide and guide along the horizontal sliding groove (35). S3: Synchronous lifting, the horizontal sliding block (30) drives the horizontal telescopic sleeve (20) to extend through the connector, pushes the wedge-shaped card block (21) to be pushed forward by the rolling wheel (52) and synchronously inserts into the target gap, and the anti-slip convex strip (22) fits the contact surface to achieve stable support; S4: Separate storage / retention, with two operating modes; Mode 1: Reverse rocker (12), hydraulic push rod (14) retracts to drive each component to reset, wedge block (21) exits the gap, rotate cover plate (16) to fold and store, reduce volume for easy carrying, at this time the whole equipment retracts and resets; Mode 2: After the wedge block (21) provides stable support, unlock and lock screw (32) to separate the two components, wedge block (21) retains the load, jack component (1) is transferred and reused, wedge block (21) can be separated, retained and reused.

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