Novel double-screw jack

Abstract

The utility model discloses a novel double-screw jack which 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. According to the utility model, the structural arrangement is reasonable, the two screw rods are matched with the driving control structure, the operation is convenient and fast, the operation is realized through one driving control structure, the bearing performance can be improved, and the stress stability and reliability are ensured through the connection of the two screw rods.

Description

Technical Field

[0001] This utility model belongs to the field of jack technology, specifically relating to a novel twin-screw jack. Background Technology

[0002] A jack is a common lifting structure. Existing jacks generally include a base plate, a hinged top arm, and a support plate at the top of the top arm. A lead screw is installed at the connection of the hinged top arm. When in use, touching the rotation of the lead screw causes the hinged top arm to move closer and raise the support plate. Although it can meet the needs of general use, its load-bearing capacity is very limited due to its single lead screw structure. It also poses certain safety hazards during use, thus limiting its applicability. Summary of the Invention

[0003] The purpose of this invention is to provide a novel twin-screw jack with a reasonable structural design that is conducive to improving load-bearing performance.

[0004] The technical solution to achieve the purpose of this utility model is a novel twin-screw jack, which includes a supporting base plate, a bearing top plate, and a lifting structure disposed between the supporting base plate and the bearing top plate. The lifting structure includes two scissor-type lifting base frames, two inverted V-shaped top frames, two lead screws, several shafts, and a drive control structure.

[0005] Two scissor-type lifting base frames are arranged in parallel. One bottom end of the scissor-type lifting base frame can be rotatably mounted on the support base plate via a shaft, and the other bottom end of the scissor-type lifting base frame can be moved horizontally within the support base plate via a slider.

[0006] The apex of the inverted V-shaped top frame is located 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 base frame via shafts.

[0007] The drive control structure is located at the connection between the inverted V-shaped top frame and the scissor-type lifting base frame, and is fixed to one of the shafts by a support plate;

[0008] Two lead screws are respectively located at the connection between the scissor-type lifting base and the inverted V-shaped top frame, with one end of the lead screw fixed on the shaft and the other end passing through the drive control structure. The lead screws are parallel to the supporting base plate and the bearing top plate.

[0009] A further preferred embodiment is that the drive control structure includes a base box and a cover fixed by a screw, a drive gear and two transmission gears connected to the base box by bearings, the drive gear meshing with the two transmission gears, and a control gear meshing with the drive gear inside the base box.

[0010] The faceplate is provided with a control shaft hole and two lead screw through holes;

[0011] The transmission gear has a threaded hole at its center, and the lead screw thread passes through the threaded hole and extends out of the lead screw through hole;

[0012] The control gear has a drive handle fixed at its center, extending out of the control shaft hole and used for connection with an external drive structure.

[0013] The rotation of the drive handle drives the control gear to rotate, which in turn drives the transmission gear to rotate, and through the threaded hole, the drive control structure moves on the lead screw.

[0014] A further preferred embodiment is that the inverted V-shaped top frame includes a first support plate and a second support plate;

[0015] The top ends of the first support plate and the second support plate are rotatably connected by a connecting shaft;

[0016] 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 frame via shafts.

[0017] A further preferred embodiment is that: two n-shaped guide plates are fixed to 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 at the bottom of the n-shaped guide plate;

[0018] The two horizontal guide grooves are located on both sides of the vertical vertical groove, and the bottom of the horizontal guide grooves are matched with the bottom of the vertical guide groove;

[0019] The upper part of the first support plate and the second support plate is provided with guide protrusions;

[0020] The connecting shaft can be raised and lowered in the vertical guide groove, and the guide protrusion is moved and positioned in the horizontal guide groove.

[0021] A further preferred embodiment is that the top surface of the supporting base plate is fixed with two parallel U-shaped connecting bases;

[0022] The U-shaped connecting base is parallel to the recessed groove of the n-shaped guide plate;

[0023] The U-shaped connecting base is provided with translational guide grooves on its symmetrical inner walls;

[0024] One 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 end of the scissor-type lifting base is translatably positioned in the recessed area of ​​the U-shaped connecting base via a slider, with the end of the slider located in the translation guide groove.

[0025] A further preferred embodiment is that the drive gear includes a large gear and a small gear fixed at the center of the side of the large gear;

[0026] The pinion meshes with the transmission gear, and the large gear meshes with the control gear.

[0027] A further preferred embodiment is that the diameter of the control gear is smaller than the diameter of the large gear;

[0028] The diameter of the transmission gear is larger than the diameter of the pinion.

[0029] A further preferred embodiment is that the supporting base plate, the load-bearing top plate, the scissor-type lifting base frame, and the inverted V-shaped top frame are all metal structures.

[0030] A further preferred embodiment is that the shaft is a round shaft, a bolt, or a pin.

[0031] This utility model has positive effects: its structure is reasonably designed, using two scissor-type lifting base frames, two inverted V-shaped top frames, two lead screws, and a drive control structure. The two lead screws and the drive control structure enable the scissor-type lifting base frames and inverted V-shaped top frames to unfold or close, thereby lifting the load-bearing top plate to complete the lifting operation. It is not only easy to operate, as it is operated through a single drive control structure, but it also improves load-bearing capacity. The connection of the two lead screws ensures stable force distribution and reliability, and it has strong applicability.

[0032] Moreover, the drive control structure includes a drive gear, two transmission gears and a control gear. Its lead screw is threaded to the center of the transmission gear. 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 drive control, and also ensure the effectiveness and consistency of translation on the two lead screws, making it highly applicable.

[0033] Furthermore, two n-shaped guide plates are fixed to 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 at the bottom of the n-shaped guide plate. Together with the connecting shaft and guide protrusion on the inverted V-shaped top frame, the effectiveness and reliability of the lifting can be guaranteed. Attached Figure Description

[0034] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0035] Figure 1 This is a schematic diagram of the structure of this utility model;

[0036] Figure 2 This is another structural view of the present invention;

[0037] Figure 3 This is a schematic diagram of the drive control structure when the face cover is opened in this utility model;

[0038] Figure 4 for Figure 1 A schematic diagram of the partial structure at point A in the middle.

[0039] Reference numerals: 1. Support base plate; 2. Bearing top plate; 3. Lifting structure; 31. Scissor-type lifting base frame; 32. Inverted V-shaped top frame; 321. First support plate; 322. Second support plate; 323. Connecting shaft; 33. Lead screw; 34. Shaft; 35. Drive control structure; 351. Base box; 352. Cover; 353. Drive gear; 354. Transmission gear; 355. Control gear; 4. Control shaft hole; 5. Lead screw through hole; 6. Drive handle; 7. N-shaped guide plate; 8. Vertical guide groove; 9. Horizontal guide groove; 10. Guide protrusion; 11. U-shaped connecting base. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0041] 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, mainly used to be placed on the bottom surface to ensure the effectiveness of lifting. The bearing top plate is a metal structure, mainly used to connect with the vehicle body or the structure that needs to be lifted to ensure the stability of lifting.

[0042] In this embodiment, the lifting structure includes two scissor-type lifting base frames 31, two inverted V-shaped top frames 32, two lead screws 33, several shafts 34, and a drive control structure 35. In this embodiment, the scissor-type lifting base frames are a conventional structure in the prior art, rotating around a central axis to achieve lifting and adjustment operations. The inverted V-shaped top frames can also be deployed or retracted. Together with the scissor-type lifting base frames, they ensure the lifting height and effectiveness. The use of two lead screws ensures proper force distribution when retracted, thereby increasing the load-bearing capacity. The drive control structure is used to control the adjustment and achieve lifting control operations. The shafts are round shafts, bolts, or pins.

[0043] During assembly, two scissor-type lifting base frames are arranged parallel to each other. One bottom end of the scissor-type lifting base frame is rotatably mounted on the supporting base plate via a shaft, and the other bottom end of the scissor-type lifting base frame is translatably mounted within the supporting base plate via a slider. The apex of the inverted V-shaped top frame is located 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 base frame via shafts. The drive control structure is located at the connection between the inverted V-shaped top frame and the scissor-type lifting base frame and is fixed to one of the shafts via a support plate. Two lead screws are located at the connection between the scissor-type lifting base frame and the inverted V-shaped top frame, with one end of the lead screw fixed to the shaft and the other end passing through the drive control structure. The lead screws are parallel to the supporting base plate and the bearing top plate. In this embodiment, the lead screws are parallel to the supporting base plate and the bearing top plate, thus ensuring the stability and effectiveness of the lifting when the drive control structure translates on the lead screws, preventing tilting, and the parallel alignment of the two lead screws also ensures uniform force distribution.

[0044] In practical applications, the drive control structure includes a base box 351 and a cover 352 fixed by screws, a drive gear 353 and two transmission gears 354 connected to the base box by bearings, the drive gear meshing with the two transmission gears, and a control gear 355 meshing with the drive gear inside the base box; a control shaft hole 4 and two lead screw through holes 5 are provided on the cover; during assembly, a threaded hole is provided at the center of the transmission gear, and the lead screw thread passes through the threaded hole and extends out of the lead screw through hole; a drive handle 6 extending out of the control shaft hole and used for connection with an external drive structure is fixed at the center of the control gear; in this embodiment, the drive handle can be connected to a hand tool or a power tool, and the rotation control of the drive handle is realized by the hand tool or the power tool, and the drive control structure is synchronously translated on the two lead screws through the drive gear and the transmission gear, ensuring the effectiveness and smoothness of the translation.

[0045] The drive gear includes a large gear and a small gear fixed to the center of the side of the large gear; the small gear meshes with the transmission gear, and the large gear meshes with the control gear. 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 small gear. This structure improves the smoothness of lifting.

[0046] During operation, the rotation of the drive handle drives the rotation of the control gear, which in turn drives the rotation of the transmission gear, and through the threaded hole, the drive control structure moves on the lead screw.

[0047] 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 by a connecting shaft 323; during connection, the bottom ends of the first and second support plates are respectively connected to the two top ends of the scissor-type lifting base frame via shafts. This structure ensures the unfolding or closing operation of the first and second support plates, and the connecting shaft can be a shaft, pin, or bolt, ensuring both effective connection and effective rotation.

[0048] In practical applications, 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 each n-shaped guide plate, and two horizontal guide grooves 9 are provided at the bottom of each n-shaped guide plate. The two horizontal guide grooves are located on either side of the vertical groove and mate with the bottom of the vertical guide groove. Furthermore, guide protrusions 10 are provided on the upper parts of the first and second support plates. The connecting shaft is vertically and vertically positioned within the vertical guide groove, and the guide protrusions are horizontally positioned within the horizontal guide groove. This structure ensures the effectiveness of the inverted V-shaped top frame during unfolding and folding, while also preventing tilting or displacement, thus improving operational stability.

[0049] In practical applications, two parallel U-shaped connecting bases 11 are fixed to the top surface of the supporting base plate; the U-shaped connecting bases are parallel to the recessed grooves of the n-shaped guide plate; translational guide grooves are provided on the symmetrical inner walls of the U-shaped connecting bases; one bottom end of the scissor-type lifting frame 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 frame is translatably positioned within the recessed area of ​​the U-shaped connecting base via a slider, with the end of the slider located within the translational guide groove. This structure ensures the effectiveness of the scissor-type lifting frame's unfolding and closing.

[0050] In practical applications, to ensure the reliability of support and lifting, the support base plate, bearing top plate, scissor-type lifting base frame, and inverted V-shaped top frame are all metal structures.

[0051] This utility model has positive effects: its structure is reasonably designed, using two scissor-type lifting base frames, two inverted V-shaped top frames, two lead screws, and a drive control structure. The two lead screws and the drive control structure enable the scissor-type lifting base frames and inverted V-shaped top frames to unfold or close, thereby lifting the load-bearing top plate to complete the lifting operation. It is not only easy to operate, as it is operated through a single drive control structure, but it also improves load-bearing capacity. The connection of the two lead screws ensures stable force distribution and reliability, and it has strong applicability.

[0052] Moreover, the drive control structure includes a drive gear, two transmission gears and a control gear. Its lead screw is threaded to the center of the transmission gear. 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 drive control, and also ensure the effectiveness and consistency of translation on the two lead screws, making it highly applicable.

[0053] Furthermore, two n-shaped guide plates are fixed to 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 at the bottom of the n-shaped guide plate. Together with the connecting shaft and guide protrusion on the inverted V-shaped top frame, the effectiveness and reliability of the lifting can be guaranteed.

[0054] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A novel double 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 comprises two scissor-type lifting chassis, two inverted V-shaped top frames, two lead screws, a plurality of shafts and a driving control structure; The two scissor-type lifting chassis are arranged in parallel, one bottom end of the scissor-type lifting chassis is rotatably arranged on the supporting bottom plate through a shaft, and the other bottom end of the scissor-type lifting chassis is translatably arranged in the supporting bottom plate through a sliding block; 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 rotatably connected to the two top ends of the scissor-type lifting chassis through shafts; The driving control structure is arranged at the connection between the inverted V-shaped top frame and the scissor-type lifting chassis, and is fixed on one of the shafts through a supporting piece; The two lead screws are arranged at the connection between the scissor-type lifting chassis and the inverted V-shaped top frame, one end of the lead screw is fixed on the shaft, and the other end of the lead screw is arranged on the driving control structure, and the lead screw is parallel to the supporting bottom plate and the bearing top plate.

2. A novel double screw jack as claimed in claim 1, wherein: The driving control structure comprises a bottom box fixed by a screw rod, a driving gear and two transmission gears connected to the bottom box through bearings, the driving gear is engaged with the two transmission gears, and the bottom box is provided with a control gear engaged with the driving gear; The surface cover is provided with a control shaft hole and two lead screw through holes; The center of the transmission gear is provided with a threaded hole, and the lead screw is threadedly arranged in the threaded hole and extends out of the lead screw through hole; The center of the control gear is fixed with a driving handle extending out of the control shaft hole and used for being connected with an external driving structure; The driving handle rotates to drive the control gear to rotate, the transmission gear is driven to rotate by the driving gear, and the driving control structure is translated on the lead screw through the threaded hole.

3. A novel double screw jack as claimed in claim 2, wherein: The inverted V-shaped top frame comprises a first supporting plate and a second supporting plate; The top ends of the first supporting plate and the second supporting plate are rotatably connected through a connecting shaft; The bottom ends of the first supporting plate and the second supporting plate are respectively connected to the two top ends of the scissor-type lifting chassis through shafts.

4. A novel double screw jack as claimed in claim 3, wherein: The bottom surface of the bearing top plate is fixed with two n-shaped guide plates, the middle part of the n-shaped guide plate is provided with a vertical guide groove, and the lower part of the n-shaped guide plate is provided with two horizontal guide grooves; The two horizontal guide grooves are located on both sides of the vertical line of the vertical guide groove, and the horizontal guide groove is matched with the bottom of the vertical guide groove; The upper part of the first supporting plate and the second supporting plate is provided with a guide convex column; The connecting shaft is arranged in the vertical guide groove in a lifting manner, and the guide convex column is arranged in the horizontal guide groove in a translational manner.

5. A novel double screw jack as claimed in claim 4, wherein: The top surface of the supporting bottom plate is fixed with two parallel U-shaped connecting bases; The U-shaped connecting base is parallel to the recessed groove of the n-shaped guide plate; The symmetrical inner wall of the U-shaped connecting base is provided with a translational guide sliding groove; One bottom end of the scissor-type lifting chassis is rotatably connected to one end of the U-shaped connecting base through a shaft, and the other bottom end of the scissor-type lifting chassis is translatably arranged in the recessed area of the U-shaped connecting base through a sliding block, and the end part of the sliding block is located in the translational guide sliding groove.

6. A novel double screw jack as claimed in claim 2, wherein: The driving gear comprises a large gear and a small gear fixed at the center of the side surface of the large gear; The small gear is engaged with the transmission gear, and the large gear is engaged with the control gear.

7. A novel double screw jack as claimed in claim 6, wherein: 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 double screw jack as claimed in claim 1, wherein: The support bottom plate, the load top plate, the scissor type lifting chassis and the inverted V-shaped top frame are metal structures.

9. A novel double screw jack as claimed in claim 1, wherein: The shaft is a round shaft, a bolt or a pin.

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