Novel double-screw jack

Abstract

The novel double-screw jack comprises a supporting bottom plate, a bearing top plate and a lifting structure arranged between the supporting bottom plate and the bearing top plate, and the lifting structure comprises two scissor-shaped lifting bottom frames, two inverted-V-shaped top frames, two lead screws, a plurality of shaft rods and a driving control structure; the top point of the inverted-V-shaped top frame is arranged on the bearing top plate, and the two bottom ends of the inverted-V-shaped top frame are rotationally connected to the two top ends of the scissor-shaped lifting bottom frame through shaft rods correspondingly. The drive control structure is arranged at the joint of the inverted-V-shaped top frame and the scissor-shaped lifting bottom frame and fixed to one of the shaft rods through a supporting piece. One end of the screw rod is fixed on the shaft rod, and the other end of the screw rod penetrates through the driving control structure. The structure arrangement is reasonable, the two lead screws are matched with the driving control structure, operation is convenient and fast, operation is achieved through one driving control structure, the bearing performance can be improved, connection is conducted through the two lead screws, and the stress stability and reliability are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of jacks, and in particular relates to a novel twin-screw jack. Background Art

[0002] A jack is a common lifting structure. The jack in the prior art generally includes a base plate, a top arm of a hinge and a support plate at the top of the top arm, and a screw rod is provided at the connection of the top arm of the hinge. When in use, the rotation of the screw rod causes the top arm of the hinge to approach and the support plate to rise. Although it can meet the general usage requirements, due to its single-wire rod structure, its load-bearing capacity is very limited, and there are certain safety hazards when in use, thus limiting its applicability. Summary of the Invention

[0003] The purpose of the present invention is to provide a novel twin-screw jack which has a reasonable structural arrangement and is conducive to improving load-bearing performance.

[0004] The technical solution for achieving the purpose of the present invention is a novel twin-screw jack, comprising a supporting base plate, a bearing top plate, and a lifting structure arranged between the supporting base plate and the bearing top plate, wherein the lifting structure comprises two scissor-shaped lifting base frames, two inverted V-shaped top frames, two screw rods, a plurality of shaft rods, and a drive control structure; Two scissor-shaped lifting bases are arranged in parallel, one bottom end of the scissor-shaped lifting base is rotatably arranged on the supporting base through a shaft rod, and the other bottom end of the scissor-shaped lifting base is translationally arranged in the supporting base through a slider; The apex of the inverted V-shaped top frame is arranged on the bearing top plate, and the two bottom ends of the inverted V-shaped top frame are rotatably connected to the two top ends of the scissor-type lifting bottom frame through shafts; The drive control structure is arranged at the connection between the inverted V-shaped top frame and the scissor-shaped lifting bottom frame, and is fixed to one of the shafts through a support plate; The two screw rods are respectively located at the connection between the scissor-type lifting base and the inverted V-shaped top frame, and one end of the screw rod is fixed on the shaft rod, and the other end is passed through the drive control structure. The screw rod is parallel to the supporting bottom plate and the load-bearing top plate.

[0005] Further preferably, the drive control structure includes a bottom box and a surface cover fixed by screws, a driving gear and two transmission gears connected to the bottom box by bearings, the driving gear meshing with the two transmission gears, and a control gear meshing with the driving gear is provided in the bottom box; The surface cover is provided with a control shaft hole and two screw rod through holes; A threaded hole is provided at the center of the transmission gear, and the screw rod is threadedly arranged in the threaded hole and extends out of the screw rod hole; A driving handle extending out of the control shaft hole and used for connecting to an external driving structure is fixed at the center of the control gear; The driving handle rotates to drive the control gear to rotate, which in turn drives the transmission gear to rotate, and the driving control structure is translated on the screw rod through the threaded hole.

[0006] It is further preferred that: the inverted V-shaped top frame includes a first support plate and a second support plate; The top ends of the first support plate and the second support plate are rotatably connected via a connecting shaft; The bottom ends of the first support plate and the second support plate are respectively connected to the two top ends of the scissor-type lifting base frame through shaft rods.

[0007] Further preferably, two n-shaped guide plates are fixed to the bottom surface of the bearing top plate, a vertical guide groove is provided in the middle of the n-shaped guide plate, and two horizontal guide grooves are provided in the lower part of the n-shaped guide plate; The two horizontal guide grooves are located on both sides of the vertical line of the vertical groove and the horizontal guide grooves match the bottom of the vertical guide grooves; The upper parts of the first support plate and the second support plate are provided with guide protrusions; The connecting shaft is arranged in a vertical guide groove in a liftable manner, and the guiding boss is arranged in a horizontal guide groove in a translational manner.

[0008] Further preferably, two parallel U-shaped connecting bases are fixed on the top surface of the supporting base plate; The U-shaped connecting base is parallel to the concave groove of the n-shaped guide plate; A translation guide slot is provided on the symmetrical inner wall of the U-shaped connection base; One bottom end of the scissor-type lifting chassis is rotatably connected to one end of the U-shaped connecting base through a shaft rod, and the other bottom end of the scissor-type lifting chassis is translationally arranged in a recessed area of ​​the U-shaped connecting base through a slider, and the end of the slider is located in the translation guide slot.

[0009] It is further preferred that: the driving gear includes a large gear and a small gear fixed at the center of the side surface of the large gear; The small gear is meshed with the transmission gear, and the large gear is meshed with the control gear.

[0010] It is further preferred that: the diameter of the control gear is smaller than the diameter of the large gear; The diameter of the transmission gear is larger than the diameter of the pinion gear.

[0011] It is further preferred that the supporting bottom plate, the bearing top plate, the scissor-shaped lifting bottom frame and the inverted V-shaped top frame are all metal structures.

[0012] More preferably, the shaft is a round shaft, a bolt or a pin.

[0013] The present invention has positive effects: the structure of the present invention is reasonable, and the two scissor-type lifting base frames, the two inverted V-shaped top frames cooperate with the two screw rods and the drive control structure. The two screw rods cooperate with the drive control structure to realize the expansion or closure of the scissor-type lifting base frames and the inverted V-shaped top frames, thereby making the load-bearing top plate rise and fall to complete the lifting operation. It is not only convenient to operate, but also can improve the load-bearing capacity. It is connected by two screw rods to ensure the stability and reliability of the force, and has strong applicability. The drive control structure includes a drive gear, two transmission gears and a control gear, and its lead screw is threadedly connected to the center of the transmission gear. When in use, the control gear is connected to an external manual or electric structure to achieve rotation control, which can improve the smoothness and effectiveness of the drive control, and can also ensure the translation effectiveness and consistency on the two lead screws, with strong applicability. In addition, two N-shaped guide plates are fixed on the bottom surface of the supporting top plate, a vertical guide groove is provided in the middle of the N-shaped guide plate, and two horizontal guide grooves are provided in the lower part of the N-shaped guide plate; combined with the connecting shaft and guide boss on the inverted V-shaped top frame, the effectiveness and reliability of lifting can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Another perspective structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure when the driving control structure of the present invention opens the cover; Figure 4 for Figure 1 Schematic diagram of the local structure at point A in the middle.

[0015] Figure numerals: supporting base plate 1, bearing top plate 2, lifting structure 3, scissor-type lifting base frame 31, inverted V-shaped top frame 32, first support plate 321, second support plate 322, connecting shaft 323, screw rod 33, shaft rod 34, drive control structure 35, bottom box 351, surface cover 352, driving gear 353, transmission gear 354, control gear 355, control shaft hole 4, screw rod through hole 5, driving handle 6, N-shaped guide plate 7, vertical guide groove 8, horizontal guide groove 9, guide boss 10, U-shaped connecting base 11. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0017] See Figures 1 to 4 As shown, a novel twin-screw jack includes a supporting base plate 1, a bearing top plate 2, and a lifting structure 3 disposed between the supporting base plate and the bearing top plate. In this embodiment, the supporting base plate is a metal flat plate, which is mainly used to be placed on the bottom surface to ensure the effectiveness of lifting. The bearing top plate is a metal structure, which is mainly used to connect with the vehicle body or the structure to be lifted to ensure the stability of the lifting. In this embodiment, the lifting structure includes two scissor-type lifting base frames 31, two inverted V-shaped top frames 32, two screw rods 33, several shafts 34, and a drive control structure 35. In this embodiment, the scissor-type lifting base frames are conventional structures in the prior art. They rotate around a central axis to achieve lifting and adjustment operations, while the inverted V-shaped top frames can also achieve expansion or closure operations. In conjunction with the scissor-type lifting base frames, the lifting height and lifting effectiveness are guaranteed. The use of two screw rods can ensure the force conditions when closing, thereby increasing the load-bearing capacity, and the drive control structure is used for control and adjustment to achieve lifting control operations. The shaft rods are round shafts, bolts, or pins.

[0018] During assembly, the two scissor-type lifting bases are arranged in parallel, one bottom end of the scissor-type lifting base is rotatably arranged on the supporting base via a shaft, and the other bottom end of the scissor-type lifting base is translationally arranged in the supporting base via a slider; the apex of the inverted V-shaped top frame is arranged on the load-bearing top plate, and the two bottom ends of the inverted V-shaped top frame are rotatably connected to the two top ends of the scissor-type lifting base via shafts; the drive control structure is arranged at the connection between the inverted V-shaped top frame and the scissor-type lifting base and is fixed to one of the shafts via a support plate; two screw rods are respectively located at the connection between the scissor-type lifting base and the inverted V-shaped top frame, and one end of the screw rod is fixed to the shaft, and the other end is passed through the drive control structure, and the screw rods are parallel to the supporting base and the load-bearing top plate. In this embodiment, the screw rods are parallel to the support base and the load-bearing top plate, so that when the drive control structure translates on the screw rods, the lifting stability and effectiveness can be guaranteed and the tilt can be prevented. In addition, the two screw rods are also parallel, which can also ensure uniform force.

[0019] In actual application, the drive control structure includes a base box 351 and a surface cover 352 fixed by screws, a driving gear 353 and two transmission gears 354 connected to the base box through bearings, the driving gear is meshed with the two transmission gears, and a control gear 355 meshed with the driving gear is provided in the base box; a control shaft hole 4 and two screw rod through-holes 5 are provided on the surface cover; during assembly, a threaded hole is provided in the center of the transmission gear, the screw rod is threaded through the threaded hole and extends out of the screw rod through-hole; a driving handle 6 extending out of the control shaft hole and used to be connected to an external drive structure is fixed at the center of the control gear; in this embodiment, the driving handle can be connected to a manual tool or an electric tool, and the rotation control of the driving handle is realized by the manual tool or the electric tool, and the driving control structure is synchronously translated on the two screw rods through the driving gear and the transmission gear to ensure the effectiveness and smoothness of the translation.

[0020] The drive gear consists of a large gear and a small gear fixed to the center of the large gear's side. The small gear meshes with the transmission gear, and the large gear meshes with the control gear. The control gear has a smaller diameter than the large gear, while the transmission gear has a larger diameter than the small gear. This structure improves lifting smoothness.

[0021] During operation, the driving handle rotates to drive the control gear to rotate, which in turn drives the transmission gear to rotate, and the driving control structure translates on the screw rod through the threaded hole.

[0022] In this embodiment, the inverted V-shaped top frame includes a first support plate 321 and a second support plate 322. The top ends of the first and second support plates are rotatably connected via a connecting shaft 323. When connected, the bottom ends of the first and second support plates are connected to the top ends of the scissor-shaped lifting base frame via shafts. This structure ensures that the first and second support plates can be opened and closed. The connecting shaft can be a shaft, pin, or bolt, ensuring both effective connection and effective rotation.

[0023] In actual use, two N-shaped guide plates 7 are fixed to the bottom surface of the supporting top plate. A vertical guide groove 8 is provided in the middle of the N-shaped guide plate, and two horizontal guide grooves 9 are provided in the lower portion of the N-shaped guide plate. The two horizontal guide grooves are located on both sides of the vertical line of the vertical groove, and the horizontal guide grooves match the bottom of the vertical guide grooves. In addition, guide bosses 10 are provided on the upper portions of the first support plate and the second support plate. The connecting shaft can be raised and lowered in the vertical guide groove, and the guide bosses are translated in the horizontal guide groove. Through the above structure, the effectiveness of the inverted V-shaped top frame when it is expanded and folded can be guaranteed, while also preventing it from tilting or shifting, thereby improving its stability in use.

[0024] In actual use, two parallel U-shaped connecting bases 11 are fixed to the top surface of the support base; the U-shaped connecting bases are parallel to the recessed grooves of the n-shaped guide plate; translation guide slots are provided on the symmetrical inner walls of the U-shaped connecting bases; one bottom end of the scissor-type lifting base is rotatably connected to one end of the U-shaped connecting base via a shaft, and the other bottom end of the scissor-type lifting base is translationally disposed within the recessed area of ​​the U-shaped connecting base via a slider, with the end of the slider located in the translation guide slot. This structure ensures the effectiveness of the scissor-type lifting base when it is expanded and collapsed.

[0025] In actual application, in order to ensure the reliability of support and lifting, the supporting bottom plate, the load-bearing top plate, the scissor-type lifting bottom frame and the inverted V-shaped top frame are all metal structures.

[0026] The present invention has positive effects: the structure of the present invention is reasonable, and the two scissor-type lifting base frames, the two inverted V-shaped top frames cooperate with the two screw rods and the drive control structure. The two screw rods cooperate with the drive control structure to realize the expansion or closure of the scissor-type lifting base frames and the inverted V-shaped top frames, thereby making the load-bearing top plate rise and fall to complete the lifting operation. It is not only convenient to operate, but also can improve the load-bearing capacity. It is connected by two screw rods to ensure the stability and reliability of the force, and has strong applicability. The drive control structure includes a drive gear, two transmission gears and a control gear, and its lead screw is threadedly connected to the center of the transmission gear. When in use, the control gear is connected to an external manual or electric structure to achieve rotation control, which can improve the smoothness and effectiveness of the drive control, and can also ensure the translation effectiveness and consistency on the two lead screws, with strong applicability. In addition, two N-shaped guide plates are fixed on the bottom surface of the supporting top plate, a vertical guide groove is provided in the middle of the N-shaped guide plate, and two horizontal guide grooves are provided in the lower part of the N-shaped guide plate; combined with the connecting shaft and guide boss on the inverted V-shaped top frame, the effectiveness and reliability of lifting can be guaranteed.

[0027] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components described in the specification can also be directly processed according to existing technical common sense without any doubt. At the same time, the connection method of each component adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so no specific description is given here.

[0028] Obviously, the above embodiments of the present invention are merely examples for the purpose of illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all embodiments here. However, obvious variations or modifications arising from the essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A novel twin-screw jack, comprising a supporting bottom plate, a bearing top plate and a lifting structure arranged between the supporting bottom plate and the bearing top plate, characterized in that: The lifting structure includes two scissor-shaped lifting bottom frames, two inverted V-shaped top frames, two screw rods, a plurality of shaft rods and a driving control structure; Two scissor-type lifting frames are arranged in parallel, one bottom end of the scissor-type lifting frame is rotatably arranged on the supporting bottom plate through a shaft rod, and the other bottom end of the scissor-type lifting frame is translationally arranged in the supporting bottom plate through a slider; The apex of the inverted V-shaped top frame is arranged on the load-bearing top plate, and the two bottom ends of the inverted V-shaped top frame are rotatably connected to the two top ends of the scissor-type lifting bottom frame through shafts respectively; The driving control structure is arranged at the connection between the inverted V-shaped top frame and the scissor-shaped lifting bottom frame, and is fixed to one of the shaft rods through a support sheet; The two screw rods are respectively located at the connection between the scissor-shaped lifting bottom frame and the inverted V-shaped top frame, and one end of the screw rod is fixed on the shaft rod, and the other end is penetrated on the driving control structure. The screw rod is parallel to the supporting bottom plate and the bearing top plate.

2. A novel twin-screw jack according to claim 1, characterized in that: The drive control structure includes a bottom box and a surface cover fixed by screws, a driving gear and two transmission gears connected to the bottom box by bearings, the driving gear meshes with the two transmission gears, and a control gear meshed with the driving gear is arranged in the bottom box; The surface cover is provided with a control shaft hole and two screw rod through holes; A threaded hole is provided at the center of the transmission gear, and the screw rod is threadedly arranged in the threaded hole and extends out of the screw rod hole; A driving handle extending out of the control shaft hole and used for connecting with an external driving structure is fixed at the center of the control gear; The driving handle rotates to drive the control gear to rotate, which in turn drives the transmission gear to rotate, and through the threaded hole, the driving control structure is translated on the screw rod.

3. A novel twin-screw jack according to claim 2, characterized in that: The inverted V-shaped top frame includes a first support plate and a second support plate; The top ends of the first support plate and the second support plate are rotatably connected via a connecting shaft; The bottom ends of the first support plate and the second support plate are respectively connected to the two top ends of the scissor-type lifting chassis through shaft rods.

4. A novel twin-screw jack according to claim 3, characterized in that: Two n-shaped guide plates are fixed to the bottom surface of the bearing top plate, a vertical guide groove is arranged in the middle of the n-shaped guide plate, and two horizontal guide grooves are arranged in the lower part of the n-shaped guide plate; The two horizontal guide grooves are located on both sides of the vertical line of the vertical groove and the horizontal guide grooves match the bottom of the vertical guide groove; The upper parts of the first support plate and the second support plate are provided with guide bosses; The connecting shaft can be lifted and lowered in the vertical guide groove, and the guiding boss is translated in the horizontal guide groove.

5. A novel twin-screw jack according to claim 4, characterized in that: Two parallel U-shaped connecting bases are fixed on the top surface of the supporting base plate; The U-shaped connecting base is parallel to the concave groove of the n-shaped guide plate; A translation guide slot is provided on the symmetrical inner wall of the U-shaped connection base; One bottom end of the scissor-type lifting chassis is rotatably connected to one end of the U-shaped connecting base through a shaft rod, and the other bottom end of the scissor-type lifting chassis is translationally arranged in a recessed area of ​​the U-shaped connecting base through a slider, and the end of the slider is in the translation guide slot.

6. A novel twin-screw jack according to claim 2, characterized in that: The driving gear includes a large gear and a small gear fixed at the center of the side of the large gear; The small gear is meshed with the transmission gear, and the large gear is meshed with the control gear.

7. A novel twin-screw jack according to claim 6, characterized in that: The diameter of the control gear is smaller than the diameter of the large gear; The diameter of the transmission gear is greater than the diameter of the pinion gear.

8. A novel twin-screw jack according to claim 1, characterized in that: The supporting bottom plate, the bearing top plate, the scissor-shaped lifting bottom frame and the inverted V-shaped top frame are all metal structures.

9. A novel twin-screw jack according to claim 1, characterized in that: The shaft rod is a round shaft, a bolt or a pin.

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