Lifting and pulling power-assisted device

Abstract

This invention relates to a lifting and pushing assist device. It solves the problems of high operating force and inconvenient operation in existing door sliding lifting devices. It includes a sliding push block acting on a pulley, a linkage push block assembly hinged to one side of the sliding push block, a transmission sleeve mechanism acting on the linkage push block assembly on its outer circumference, and a rotary drive assembly at the end of the transmission sleeve mechanism away from the linkage push block assembly for driving the transmission sleeve mechanism forward, thereby causing the linkage push block assembly to move synchronously with the sliding push block. The rotary drive assembly is connected to a rotary drive power structure and a linear drive power structure, respectively. A sliding limit base is provided at the bottom of the transmission sleeve mechanism. The advantages of this invention are: effectively reducing operating force, achieving convenient operation, improving power transmission efficiency, making the lifting action smooth and stable, optimizing the door lifting operation experience, and providing good performance.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment technology, and specifically to a lifting and pushing assist device. Background Technology

[0002] Lift-and-slide doors are a common type of door in modern buildings. Their bottom features a sliding lifting structure that can be raised or lowered relative to the door leaf. When the door leaf is raised, the sliding lifting structure descends to contact the bottom door frame and slides to open or close the door. When the door leaf is lowered, the sliding lifting structure simultaneously retracts upwards, detaching from the bottom door frame, thus securing the door. The raising and lowering of the sliding lifting structure relative to the door leaf is controlled by a transmission mechanism on the door leaf. When the user turns the handle, the handle drives a transmission wheel within the transmission mechanism, which in turn drives a transmission rod component to move up and down. This transmission rod component connects to the sliding lifting structure, thus linking the sliding lifting structure to raise and lower the door leaf.

[0003] However, the existing large-scale lifting sliding doors use many irregularly shaped parts in their sliding lifting structure, and the connection and installation structure is relatively complex. This results in high production costs and complicated maintenance. In addition, there is no power assist function in the upward direction of the door leaf. When the handle drives the transmission to lift the door, a considerable amount of force is required to lift the door leaf. The lifting operation requires a lot of force and is not easy to operate.

[0004] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a lifting structure for a heavy-duty lifting sliding door [202211302653.6]. It includes a lifting aid and a lifting device that works with the handle. The lifting device includes a base fixed to the bottom of the sliding door, a pulley assembly slidably connected to the base, and a lifting component connected to the front end of the pulley assembly. The lifting aid includes a cylinder and a connector. The cylinder is connected to the sliding door and has a telescopic space inside, in which a compression spring is installed. The connector is located at the opening of the telescopic space, with one end connected to the compression spring and the other end connected to the pulley assembly. Rotating the handle causes the lifting component to pull the pulley assembly to move in a first direction, thereby driving the base to lift vertically upward. The compression spring rebounds, providing a thrust to the pulley assembly to move in the first direction, reducing the force required to rotate the handle and making the handle more sensitive and effortless to rotate.

[0005] The above solution has solved to some extent the problems of complex connection and installation structure and cumbersome maintenance of the sliding lifting structure in the existing technology. However, the solution still has many shortcomings. For example, when the handle drives the transmission to lift the door, it requires a lot of force to lift the door leaf. The operation of lifting the door requires a lot of force and is not easy to operate. Summary of the Invention

[0006] The purpose of this invention is to address the technical problems of the large force required to lift the door leaf and the inconvenience of operation, by providing a lifting and pushing assistance device that is easy to use and can effectively reduce the operating force.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a lifting and pushing assist device, comprising a sliding push block acting on a pulley, a linkage push block assembly hinged to one side of the sliding push block, a transmission sleeve mechanism acting on the linkage push block assembly being arranged circumferentially outside the linkage push block assembly, a rotary drive assembly for driving the transmission sleeve mechanism forward so that the linkage push block assembly drives the sliding push block to move synchronously at one end away from the linkage push block assembly, the rotary drive assembly being connected to a rotary drive power structure and a linear drive power structure respectively, and a sliding limit base being arranged at the bottom of the transmission sleeve mechanism.

[0008] In the aforementioned lifting and pushing assist device, the linkage push block assembly includes a push block body, which has a plurality of top pressure spring positioning grooves. One end of the top pressure spring positioning groove is closed and forms a force-bearing part, while the other end of the top pressure spring positioning groove is open. The end of the push block body near the sliding push block has a hinge connection part, and the sliding push block has a hinge connection seat corresponding to the hinge connection part. The hinge connection part and the hinge connection seat are connected by a hinge shaft, and the end of the hinge connection part acts on the sliding push block.

[0009] In the aforementioned lifting and pushing assist device, anti-contact pads are provided on the upper and lower sides of the push block body.

[0010] In the aforementioned lifting and pushing assist device, the transmission sleeve mechanism includes a transmission sleeve sleeved on the circumferential outer side of the push block body and driven by a rotary drive assembly to move along the axial direction of the push block body. The front end of the transmission sleeve on the circumferential inner side is provided with a sliding groove into which the push block body can slide. The rear end of the transmission sleeve on the circumferential inner side is closed by a spring positioning base. The spring positioning base is provided with a plurality of spring positioning channels corresponding to the top pressure spring positioning groove. The spring positioning channels and the top pressure spring positioning groove are filled with top pressure springs, and the two ends of the top pressure springs are in contact with the force-bearing part and the end of the spring positioning channel, respectively.

[0011] In the aforementioned lifting and pushing assist device, the rotary drive assembly includes a rotary drive plate, one end of which is provided with a rotary hinge, and the end of the transmission sleeve is provided with a hinge positioning seat for connecting the rotary hinge. The rotary hinge and the hinge positioning seat are connected by a rotary linkage shaft, which is driven by a rotary drive motor located externally. The end of the rotary drive plate away from the rotary hinge extends axially along the top of the transmission sleeve and does not make contact with the bottom of the transmission sleeve.

[0012] In the aforementioned lifting and pushing assist device, the rotational drive power structure includes a sliding connecting base slidably disposed in a limiting groove on the upper end face of the sliding limiting base. A rotation positioning seat is provided at the upper end of the sliding connecting base, and a limiting swing support rod is connected to the rotating positioning seat via a synchronous rotation shaft. The synchronous rotation shaft is connected to the aforementioned rotation linkage shaft via a synchronous linkage belt. The upper end of the limiting swing support rod forms a sliding limit with the rotational drive plate through a laterally arranged telescopic mechanism.

[0013] In the aforementioned lifting and pushing assist device, the telescopic mechanism includes a first telescopic support rod disposed on the upper end of the limiting swing support rod. The end of the first telescopic support rod away from the limiting swing support rod is connected to a second telescopic support rod via a bending rotation shaft. A limiting slider is disposed on the lower side of the end of the second telescopic support rod away from the bending rotation shaft. A sliding limiting groove is disposed on the upper surface of the rotation drive plate for the limiting slider to slide.

[0014] In the aforementioned lifting and pushing assist device, the linear drive power structure includes several positioning holes provided on the rotating drive plate. A traction linkage shaft is provided in the positioning hole, and a traction cylinder is connected to the traction linkage shaft through a locking ring. A positioning block is provided at the end of the traction cylinder away from the traction linkage shaft, and a horizontally positioned positioning plate is provided on the lower side of the positioning block. An open positioning groove for positioning the positioning block is provided on the upper surface of the positioning plate, and the positioning plate is positioned by rotating and positioning it to an external hanging rod.

[0015] In the aforementioned lifting and pushing assist device, a movable guide groove is provided at the end of the sliding limit base away from the limit groove, and a sliding contact part is provided at the bottom of the transmission sleeve, which is slidably disposed in the movable guide groove. A front height adjusting rod and a rear limit guide rod are provided on the sliding contact part. The upper ends of the front height adjusting rod and the rear limit guide rod extend through the sliding contact part and are disposed in the sliding groove at the front end of the transmission sleeve. The bottom of the front height adjusting rod passes through the movable guide groove and is located at the bottom of the sliding limit base, and the bottom of the rear limit guide rod is flush with the bottom of the sliding contact part.

[0016] In the aforementioned lifting and pushing assist device, a forward stroke adjustment groove is provided at the bottom of the hinged connection part, and the upper end of the front height adjustment rod is slidably disposed in the forward stroke adjustment groove and forms a top pressure on the hinged connection part. A strip-shaped stroke limiting groove is provided at the bottom of the push block body, corresponding to the rear limiting guide rod, and the front end of the strip-shaped stroke limiting groove is open, while the rear end is closed to form a limit.

[0017] Compared with existing technologies, the advantages of this invention are as follows: it effectively solves the technical problems of large lifting force and inconvenient operation of the door; it adopts dual power coordinated drive to effectively reduce the operating force and achieve easy operation; it uses a top pressure spring to achieve elastic buffering, and the hinge linkage structure reduces power loss and improves power transmission efficiency, making the lifting action smooth and stable; secondly, it uses multiple limit guide components and anti-contact pads to reduce running resistance and component jamming, ensuring stable operation of the device; and it has an adjustable design to adapt to different door working conditions, taking into account practicality and adaptability, thereby optimizing the operating experience of door lifting. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the transmission sleeve in this invention;

[0021] Figure 4 This is a detailed structural diagram of the pusher block body in this invention;

[0022] Figure 5 This is a schematic diagram of the rotation drive plate structure in this invention;

[0023] In the diagram: 1. Sliding push block; 2. Linkage push block assembly; 21. Push block body; 21. Strip stroke limit groove; 211. Top pressure spring positioning groove; 22. Force-bearing part; 23. Hinge connection part; 24. Front stroke adjustment groove; 241. Hinge connection seat; 25. Hinge shaft; 26. Anti-contact pad; 27. Transmission sleeve mechanism; 3. Transmission sleeve; 31. Sliding groove; 32. Spring positioning base; 33. Spring positioning channel; 34. Top pressure spring; 35. Rotary drive assembly; 4. Rotary drive plate; 41. Rotary hinge part; 42. Hinge positioning seat; 43. Rotary linkage shaft; 44. Rotary drive power structure; 5. Sliding connection base; 51. Rotation. Positioning seat 52, synchronous rotating shaft 53, limiting swing support rod 54, synchronous linkage belt 55, telescopic mechanism 56, first telescopic support rod 561, bending rotating shaft 562, second telescopic support rod 563, limiting slider 564, sliding limiting groove 565, linear drive power structure 6, positioning hole 61, traction linkage shaft 62, locking ring 63, traction cylinder 64, positioning block 65, open positioning groove 67, positioning cross plate 66, hanging rod 68, sliding limiting base 7, limiting slide groove 71, moving guide groove 72, sliding contact part 73, front height adjustment rod 74, rear limiting guide rod 75. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1-5 As shown, a lifting and pushing assist device includes a sliding push block 1 acting on a pulley. A linkage push block assembly 2 is hinged to one side of the sliding push block 1. A transmission sleeve mechanism 3 acting on the linkage push block assembly 2 is arranged on the outer side of the linkage push block assembly 2. A rotary drive assembly 4 is provided at the end of the transmission sleeve mechanism 3 away from the linkage push block assembly 2 for driving the transmission sleeve mechanism 3 to move forward, thereby causing the linkage push block assembly 2 to drive the sliding push block 1 to move synchronously. The rotary drive assembly 4 is connected to a rotary drive power structure 5 and a linear drive power structure 6 respectively. A sliding limit base 7 is provided at the bottom of the transmission sleeve mechanism 3.

[0026] The linkage push block assembly 2 includes a push block body 21, which has a plurality of top pressure spring positioning grooves 22. One end of the top pressure spring positioning groove 22 is closed and forms a force-bearing part 23, and the other end of the top pressure spring positioning groove 22 is open. The push block body 21 has a hinge connection part 24 near the sliding push block 1, and the sliding push block 1 has a hinge connection seat 25 corresponding to the hinge connection part 24. The hinge connection part 24 and the hinge connection seat 25 are connected by a hinge shaft 26, and the end of the hinge connection part 24 acts on the sliding push block 1.

[0027] The number of top pressure spring positioning grooves 22 is set to at least three. When the top pressure spring 35 set in the top pressure spring positioning groove 22 is subjected to force, it forms a thrust on the force-bearing part 23 of the push block body 21, thereby causing the sliding push block 1 to slide indirectly under force, so as to increase the thrust during the lifting process of the pulley.

[0028] Furthermore, anti-contact pads 27 are provided on the upper and lower sides of the push block body 21.

[0029] The anti-contact pad 27 on the push block body 21 is used to reduce the contact area between the outer wall of the push block body 21 and the inner wall of the transmission sleeve 31, thereby reducing frictional resistance.

[0030] In detail, the transmission sleeve mechanism 3 includes a transmission sleeve 31 sleeved on the outer circumference of the push block body 21 and driven by a rotary drive assembly 4 to move axially along the push block body 21. The front end of the transmission sleeve 31 is provided with a sliding groove 32 for the push block body 21 to slide into, and the rear end of the transmission sleeve 31 is closed by a spring positioning base 33. The spring positioning base 33 is provided with a plurality of spring positioning channels 34 corresponding to the top pressure spring positioning groove 22. The spring positioning channels 34 and the top pressure spring positioning groove 22 are filled with top pressure springs 35, and the two ends of the top pressure springs 35 are in contact with the force-receiving part 23 and the end of the spring positioning channel 34, respectively.

[0031] When the transmission sleeve 31 moves forward, the top pressure spring 35 is subjected to force at one end in the spring positioning channel 34, while the other end exerts a thrust on the force-bearing part 23 of the push block body 21, thereby causing the push block body 21 to move forward in the sliding groove 32, and thus pushing the sliding push block 1 to move.

[0032] In addition, the rotary drive assembly 4 includes a rotary drive plate 41, one end of which is provided with a rotary hinge part 42, and the end of the transmission sleeve 31 is provided with a hinge positioning seat 43 for connecting the rotary hinge part 42. The rotary hinge part 42 and the hinge positioning seat 43 are connected by a rotary linkage shaft 44, which is driven by a rotary drive motor located externally. The end of the rotary drive plate 41 away from the rotary hinge part 42 extends axially along the top of the transmission sleeve 31 and the bottom does not contact the transmission sleeve 31.

[0033] The rotation drive motor drives the rotation linkage shaft 44 to rotate, and the rotation linkage shaft 44 drives the rotation drive plate 41 to rotate, thereby causing one end of the rotation hinge part 42 to form a top pressure on the transmission sleeve 31, causing the transmission sleeve 31 to move forward, so as to compress the top pressure spring 35.

[0034] Specifically, the rotation drive power structure 5 includes a sliding connecting base 51 slidably disposed in a limiting groove 71 on the upper end face of the sliding limiting base 7. A rotation positioning seat 52 is provided on the upper end of the sliding connecting base 51, and a limiting swing support rod 54 is connected to the rotating positioning seat 52 through a synchronous rotation shaft 53. The synchronous rotation shaft 53 is connected to the aforementioned rotation linkage shaft 44 through a synchronous linkage belt 55. The upper end of the limiting swing support rod 54 forms a sliding limit with the rotation drive plate 41 through a horizontally arranged telescopic mechanism 56.

[0035] When the rotation drive motor drives the rotation drive plate 41 to rotate, the synchronous rotation shaft 53 connected to the rotation linkage shaft 44 via the synchronous belt rotates simultaneously, causing the telescopic mechanism 56 to retract and bend, thereby achieving synchronous drive of the upper and lower sides of the rotation drive plate 41 and improving rotational power and stability.

[0036] The sliding connection base 51 is elastically limited by an externally mounted tension spring.

[0037] Furthermore, the telescopic mechanism 56 includes a first telescopic support rod 561 disposed on the upper end of the limiting swing support rod 54. The end of the first telescopic support rod 561 away from the limiting swing support rod 54 is connected to a second telescopic support rod 563 via a bending rotation shaft 562. A limiting slider 564 is disposed on the lower side of the end of the second telescopic support rod 563 away from the bending rotation shaft 562. A sliding limiting groove 565 is disposed on the upper surface of the rotation drive plate 41 for the limiting slider 564 to slide.

[0038] When the rotating linkage shaft 44 rotates and drives the rotating drive plate 41 to rotate synchronously, due to the action of the synchronous belt, the synchronous rotating shaft 53 drives the limit swing support rod 54 to swing, and pulls the limit slider 564 located in the sliding limit groove 565 to slide through the telescopic mechanism 56. Due to the stroke limit of the sliding limit groove 565 and the rotational thrust of the rotating drive plate 41, the first telescopic support rod 561 and the second telescopic support rod 563 bend along the bending rotating shaft 562. At this time, the lower side of the rotating drive plate 41 is subjected to the rotational driving force, while the upper side is subjected to the pulling force of the telescopic mechanism 56, thus achieving efficient and stable force distribution.

[0039] More specifically, the linear drive power structure 6 includes several positioning holes 61 provided on the rotating drive plate 41. A traction linkage shaft 62 is provided in the positioning hole 61, and a traction cylinder 64 is connected to the traction linkage shaft 62 through a locking ring 63. A positioning block 65 is provided at the end of the traction cylinder 64 away from the traction linkage shaft 62, and a horizontally arranged positioning plate 66 is provided on the lower side of the positioning block 65. An open positioning groove 67 for positioning the positioning block 65 is provided on the upper surface of the positioning plate 66, and the positioning plate 66 is positioned by rotating and positioning on an external hanging rod 68.

[0040] The traction cylinder 64 pulls the traction linkage shaft 62, thereby causing the rotating hinge part 42 at one end of the rotating drive plate 41 to press against the transmission sleeve 31 and move forward. During the forward movement, the sliding connection base 51 slides synchronously on the sliding limit base 7. When the rotating drive plate 41 rotates, the positioning block 65 can disengage from the open positioning groove 67, thereby causing the traction cylinder 64 to rotate synchronously with the rotating drive plate 41.

[0041] It should be noted that: the hanging rod 68 is positioned by rotating the shaft, and a torsion spring is installed on the shaft to ensure the vertical state of the rod 68. When the traction cylinder 64 is activated, the positioning plate 66 remains stable. When the angle of the device is adjusted by adjusting the front height adjustment rod 74, the traction cylinder 64 and the hanging rod 68 rotate clockwise under the pressure of the torsion spring.

[0042] Furthermore, a movable guide groove 72 is provided at the end of the sliding limit base 7 away from the limit groove 71, and a sliding contact part 73 is provided at the bottom of the transmission sleeve 31, which is slidably disposed in the movable guide groove 72. A front height adjustment rod 74 and a rear limit guide rod 75 are provided on the sliding contact part 73. The upper ends of the front height adjustment rod 74 and the rear limit guide rod 75 extend through the sliding contact part 73 and are disposed in the sliding groove 32 at the front end of the transmission sleeve 31. The bottom of the front height adjustment rod 74 passes through the movable guide groove 72 and is located at the bottom of the sliding limit base 7, and the bottom of the rear limit guide rod 75 is flush with the bottom of the sliding contact part 73.

[0043] Preferably, the bottom of the hinged connection 24 is provided with a front stroke adjustment groove 241, the upper end of the front height adjustment rod 74 is slidably disposed in the front stroke adjustment groove 241 and forms a top pressure on the hinged connection 24, and the bottom of the push block body 21 is provided with a strip-shaped stroke limiting groove 211 corresponding to the rear limiting guide rod 75, and the front end of the strip-shaped stroke limiting groove 211 is open, while the rear end is closed to form a limit.

[0044] The rear limit guide rod 75 ensures that the push block body 21 moves linearly along the transmission sleeve 31, preventing misalignment and slippage of the push block body 21.

[0045] Example 1:

[0046] An external rotation drive motor drives the rotation linkage shaft 44 to rotate, which in turn drives the rotation drive plate 41 to rotate. At the same time, the rotation linkage shaft 44 drives the synchronous rotation shaft 53 to rotate through the synchronous linkage belt 55, causing the limit swing support rod 54 to swing. The telescopic mechanism 56 at its upper end retracts and bends, and slides in the sliding limit groove 565 through the limit slider 564, forming a pulling force on the upper side of the rotation drive plate 41. This force works in conjunction with the rotational force on the lower side of the rotation drive plate 41 to cause the rotation hinge part 42 to press against the transmission sleeve 31, causing the transmission sleeve 31 to move forward along the sliding limit base 7. During the forward movement of the transmission sleeve 31, the pressure spring 35 is stressed, which forms a pushing force on the force-bearing part 23 of the push block body 21, pushing the push block body 21 forward. The push block body 21 drives the sliding push block 1 to move synchronously through the hinge connection part 24, which in turn acts on the pulley, achieving the technical effect of reducing operating force and improving the overall product experience.

[0047] Example 2:

[0048] By pulling the traction linkage shaft 62 through the traction cylinder 64, the rotating hinge part 42 of the rotating drive plate 41 is forced to press against one end of the transmission sleeve 31, causing the transmission sleeve 31 to move forward along the moving guide groove 72. During the forward movement of the transmission sleeve 31, the pressing spring 35 in the internal spring positioning channel 34 is subjected to force, which forms a thrust on the force-bearing part 23 of the push block body 21 of the linkage push block assembly 2, pushing the push block body 21 forward. The push block body 21 is linked with the hinge connection seat 25 through the hinge connection part 24, which drives the sliding push block 1 to move synchronously, and then acts on the pulley to realize the lifting of the door.

[0049] Example 3

[0050] According to the position of the pulley required for lifting, the height of the front height adjustment rod 74 can be adjusted so that the entire adjustment device can rotate along the hinge shaft 26 on the hinge connection seat 25, thereby adjusting the overall force position of the sliding push block 1; when the device rotates as a whole, the linear drive power structure 6 rotates clockwise through the externally positioned hanging rod 68.

[0051] In summary, the principle of this embodiment is as follows: the rotating hinge part 42 of the rotating drive assembly 4 presses the top-pressure transmission sleeve 31, causing the transmission sleeve 31 to compress the top-pressure spring 35. The other end of the top-pressure spring 35 acts on the force-receiving part 23 of the push block body 21 and forms a thrust, pushing the push block body 21 forward. The push block body 21 drives the sliding push block 1 to move synchronously, and then acts on the pulley. The power source of this invention comes from the rotating drive power structure 5 and the linear drive power structure 6. The rotating drive power structure 5 is used for short-stroke adjustment, and the linear drive power structure 6 is used for long-stroke adjustment. The two can be used alone or in combination, depending on the situation.

[0052] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0053] Although this paper extensively uses the following components: sliding push block 1, linkage push block assembly 2, push block body 21, strip-shaped stroke limiting groove 211, top pressure spring positioning groove 22, force-bearing part 23, hinged connection part 24, front stroke adjustment groove 241, hinged connection seat 25, hinge shaft 26, anti-contact pad 27, transmission sleeve mechanism 3, transmission sleeve 31, sliding groove 32, spring positioning base 33, spring positioning channel 34, top pressure spring 35, rotary drive assembly 4, rotary drive plate 41, rotary hinge part 42, hinged positioning seat 43, rotary linkage shaft 44, rotary drive power structure 5, sliding connection base 51, rotary positioning seat 52. The terms used include synchronous rotating shaft 53, limiting swing support rod 54, synchronous linkage belt 55, telescopic mechanism 56, first telescopic support rod 561, bending rotating shaft 562, second telescopic support rod 563, limiting slider 564, sliding limiting groove 565, linear drive power structure 6, positioning hole 61, traction linkage shaft 62, locking ring 63, traction cylinder 64, positioning block 65, open positioning groove 67, positioning cross plate 66, hanging rod 68, sliding limiting base 7, limiting slide groove 71, moving guide groove 72, sliding contact part 73, front height adjustment rod 74, and rear limiting guide rod 75, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A lifting and pushing assist device, comprising a sliding push block (1) acting on a pulley, characterized in that, The sliding push block (1) is hinged to one side with a linkage push block assembly (2). The linkage push block assembly (2) is provided with a transmission sleeve mechanism (3) acting on the linkage push block assembly (2) on its outer circumference. The transmission sleeve mechanism (3) is provided with a rotary drive assembly (4) at the end away from the linkage push block assembly (2) for driving the transmission sleeve mechanism (3) to move forward, thereby causing the linkage push block assembly (2) to drive the sliding push block (1) to move synchronously. The rotary drive assembly (4) is connected to a rotary drive power structure (5) and a linear drive power structure (6) respectively. The bottom of the transmission sleeve mechanism (3) is provided with a sliding limit base (7).

2. The lifting and pushing assist device according to claim 1, characterized in that, The linkage push block assembly (2) includes a push block body (21). The push block body (21) is provided with a plurality of top pressure spring positioning grooves (22). One end of the top pressure spring positioning groove (22) is closed and forms a force-bearing part (23), and the other end of the top pressure spring positioning groove (22) is open. The push block body (21) is provided with a hinge connection part (24) at one end near the sliding push block (1), and the sliding push block (1) is provided with a hinge connection seat (25) corresponding to the hinge connection part (24). The hinge connection part (24) and the hinge connection seat (25) are connected by a hinge shaft (26), and the end of the hinge connection part (24) acts on the sliding push block (1).

3. The lifting and pushing assist device according to claim 2, characterized in that, The push block body (21) is provided with anti-contact pads (27) on the upper and lower sides.

4. The lifting and pushing assist device according to claim 2, characterized in that, The transmission sleeve mechanism (3) includes a transmission sleeve (31) sleeved on the outer circumferential side of the push block body (21) and driven by a rotary drive assembly (4) to move axially along the push block body (21). The front end of the transmission sleeve (31) is provided with a sliding groove (32) into which the push block body (21) can slide. The rear end of the transmission sleeve (31) is closed by a spring positioning base (33). The spring positioning base (33) is provided with a plurality of spring positioning channels (34) corresponding to the top pressure spring positioning groove (22). The spring positioning channels (34) and the top pressure spring positioning groove (22) are filled with top pressure springs (35). The two ends of the top pressure springs (35) are in contact with the force-bearing part (23) and the end of the spring positioning channel (34), respectively.

5. A lifting and pushing assist device according to claim 4, characterized in that, The rotary drive assembly (4) includes a rotary drive plate (41), one end of which is provided with a rotary hinge part (42), and the end of the transmission sleeve (31) is provided with a hinge positioning seat (43) for connecting the rotary hinge part (42). The rotary hinge part (42) and the hinge positioning seat (43) are connected by a rotary linkage shaft (44). The rotary linkage shaft (44) is driven by a rotary drive motor located outside. The end of the rotary drive plate (41) away from the rotary hinge part (42) extends axially along the top of the transmission sleeve (31) and the bottom does not contact the transmission sleeve (31).

6. A lifting and pushing assist device according to claim 5, characterized in that, The rotation drive power structure (5) includes a sliding connecting base (51) that is slidably disposed in the limiting groove (71) on the upper end face of the sliding limiting base (7). A rotation positioning seat (52) is provided on the upper end of the sliding connecting base (51), and a limiting swing support rod (54) is connected to the rotating positioning seat (52) through a synchronous rotation shaft (53). The synchronous rotation shaft (53) is connected to the aforementioned rotation linkage shaft (44) through a synchronous linkage belt (55). The upper end of the limiting swing support rod (54) forms a sliding limit with the rotation drive plate (41) through a horizontally arranged telescopic mechanism (56).

7. A lifting and pushing assist device according to claim 6, characterized in that, The telescopic mechanism (56) includes a first telescopic support rod (561) disposed on the upper end of the limiting swing support rod (54). The end of the first telescopic support rod (561) away from the limiting swing support rod (54) is connected to a second telescopic support rod (563) via a bending rotation shaft (562). A limiting slider (564) is disposed on the lower side of the end of the second telescopic support rod (563) away from the bending rotation shaft (562). A sliding limiting groove (565) is disposed on the upper surface of the rotation drive plate (41) for the limiting slider (564) to slide.

8. A lifting and pushing assist device according to claim 5, characterized in that, The linear drive power structure (6) includes several positioning holes (61) on the rotating drive plate (41). A traction linkage shaft (62) is provided in the positioning hole (61), and a traction cylinder (64) is connected to the traction linkage shaft (62) through a locking ring (63). A positioning block (65) is provided at one end of the traction cylinder (64) away from the traction linkage shaft (62), and a horizontally arranged positioning plate (66) is provided on the lower side of the positioning block (65). An open positioning groove (67) for positioning the positioning block (65) is provided on the upper surface of the positioning plate (66), and the positioning plate (66) is positioned by rotating and positioning the external hanging rod (68).

9. A lifting and pushing assist device according to claim 5, characterized in that, The sliding limiting base (7) is provided with a moving guide groove (72) at one end away from the limiting slide groove (71). The bottom of the transmission sleeve (31) is provided with a sliding contact part (73) that is slidably disposed in the moving guide groove (72). The sliding contact part (73) is provided with a front height adjustment rod (74) and a rear limiting guide rod (75). The upper ends of the front height adjustment rod (74) and the rear limiting guide rod (75) extend through the sliding contact part (73) and are disposed in the sliding groove (32) at the front end of the transmission sleeve (31). The bottom of the front height adjustment rod (74) passes through the moving guide groove (72) and is located at the bottom of the sliding limiting base (7). The bottom of the rear limiting guide rod (75) is flush with the bottom of the sliding contact part (73).

10. A lifting and pushing assist device according to claim 9, characterized in that, The hinged connection part (24) is provided with a front stroke adjustment groove (241) at the bottom. The upper end of the front height adjustment rod (74) is slidably disposed in the front stroke adjustment groove (241) and forms a top pressure on the hinged connection part (24). The bottom of the push block body (21) is provided with a strip-shaped stroke limiting groove (211) corresponding to the rear limiting guide rod (75). The front end of the strip-shaped stroke limiting groove (211) is open, while the rear end is closed to form a limit.

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