Multifunctional hand-cranking spanning roof

Abstract

The invention belongs to the technical field of hand jacks, and discloses a multifunctional hand spanning roof which comprises a hand spanning roof machine, the bottom of the hand spanning roof machine is fixedly connected with a bottom plate, the top of the hand spanning roof machine is provided with a top plate, and the multifunctional hand spanning roof further comprises a positioning piece arranged on the right side of the hand spanning roof machine and used for rapidly adjusting the angle and position of the top plate. The positioning piece comprises a transmission device, and the transmission device is fixedly connected to the right side of the hand-cranking roof spanning machine. The transmission device and the first screw drive the second screw to rotate, the second screw jacks up the hand-cranking roof-crossing machine through the lifting plate and the universal wheels, and equipment is conveniently pushed to move; and meanwhile, the threaded sleeve drives the first gear sleeve to move upwards and disengage from the second gear sleeve through the sleeve plate, the top plate can be conveniently rotated to align with the bearing point of the vehicle, the lifting plate is driven to reset upwards through the transmission device and the second screw rod after alignment, and therefore the advantage of rapid alignment and positioning is achieved, and an operator can conveniently rotate the handle through a proper posture.

Description

Technical Field

[0001] The invention belongs to the technical field of hand-crank jacks, in particular to a multifunctional hand-crank span jack. Background Art

[0002] With the rapid development of industries such as vehicle maintenance and logistics loading and unloading, hand-cranked straddle jacks are widely used as important lifting equipment. Hand-cranked straddle jacks, also known as hand-cranked jacks and hand-cranked straddle jacks, are a mechanical jack used to lift heavy objects, but their power is hand-cranked force.

[0003] When repairing some vehicles, maintenance personnel will use a hand-cranked jacking machine to jack up the vehicle. However, existing hand-cranked jacking machines are heavy, and the top support plate is generally fixed. When facing vehicles with different chassis structures, the angle and position cannot be flexibly adjusted, resulting in the problem of misalignment between the handle and the operator. It is necessary to shake the handle sideways during operation, which increases the risk of sprains caused by improper posture. It is inconvenient to quickly align with the bearing point at the bottom of the vehicle, which reduces the jacking efficiency. Summary of the Invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a multifunctional hand-cranked cross-over jack, including a hand-cranked cross-over jack machine, the bottom of which is fixedly connected to a bottom plate, the top of which is provided with a top plate, and further comprising: The positioning piece is set on the right side of the hand-cranked cross-lift machine and is used to quickly adjust the angle and position of the top plate; The positioning member includes a transmission device, which is fixedly connected to the right side of the hand-cranked cross-jacking machine. A screw rod 1 is provided inside the transmission device. A screw sleeve is threadedly connected to the top of the screw rod surface. A sleeve is fixedly connected to the left side of the sleeve. A laser positioning cylinder is provided inside the sleeve. The top of the laser positioning cylinder is fixedly connected to the bottom of the top plate. A hexagonal rod is slidably connected to the inside of the screw rod 1. An indicator component is provided on the front of the screw rod 1. The bottom end of the hexagonal rod is fixedly connected to screw rod 2, the bottom end of screw rod 2 is fixedly connected to the inside of the base plate through a bearing, the surface of screw rod 2 is threadedly connected to a connecting sleeve, the right side of the connecting sleeve is fixedly connected to a lifting plate, and the four corners of the lifting plate are fixedly connected to universal wheels.

[0005] In the above technical solution, preferably, the transmission device includes a transmission box, the screw 1 is fixedly connected to the inside of the transmission box through a bearing, the inside of the transmission box is fixedly connected to a worm through a bearing, the front end of the worm is fixedly connected to a rotating plate, the surface of the screw 1 is fixedly connected to a worm wheel located inside the transmission box, and the worm is meshed with the worm wheel.

[0006] In the above technical solution, preferably, the laser positioning cylinder includes a gear sleeve 1, the gear sleeve 1 is slidably connected to the inside of the sleeve plate, the top of the hand-cranked cross-lift machine is fixedly connected to a gear sleeve 2, the bottom of the gear sleeve 1 is engaged with the top of the gear sleeve 2, the inside of the gear sleeve 2 is slidably connected to a T-shaped rod, and the top end of the T-shaped rod is fixedly connected to the bottom of the top plate; The front and rear sides of the inner wall of the gear sleeve are fixedly connected with sliders, and the front and rear sides of the T-shaped rod are provided with sliding grooves, and the sliders are slidably connected inside the sliding grooves; A laser lamp is fixedly connected to the bottom of the second inner wall of the gear sleeve, the T-shaped rod is sleeved on the surface of the laser lamp, the top of the laser lamp passes through the inside of the top plate, a travel switch is fixedly connected to the right side of the top of the hand-cranked cross-top machine, the top of the travel switch is in contact with the bottom of the sleeve, and the front of the screw sleeve is fixedly connected to the battery box.

[0007] In the above technical solution, preferably, an observation assembly is provided on the front of the hand-cranked cross-top machine, and the observation assembly includes a rotating rod, and the top and bottom of the rotating rod surface are both provided with support sleeves, the back of the support sleeve is fixedly connected to the surface of the hand-cranked cross-top machine, and the right side of the rotating rod surface is slidably sleeved with a mounting sleeve, and the inside of the mounting sleeve is fixedly connected to a lens.

[0008] In the above technical solution, preferably, both sides of the top of the mounting sleeve are fixedly connected to the slide rails, a sliding sleeve is provided on the front side of the top of the mounting sleeve, both sides of the bottom of the sliding sleeve are slidably sleeved on the surface of the slide rails, and the bottom of the sliding sleeve is fixedly connected to a sponge pad.

[0009] In the above technical solution, preferably, a rubber soft magnetic strip is fixedly connected to the top of the slide rail, and a square flashlight is fixedly connected to the front of the mounting sleeve.

[0010] In the above technical solution, preferably, the indicating assembly includes an opening, which is opened on the front side of screw rod 1, and scale grooves are opened on both sides of the inner wall of the opening. The top of the front side of the hexagonal rod is fixedly connected with an indicating plate, and the indicating plate is slidably connected to the inside of the opening.

[0011] In the above technical solution, preferably, a circular ring is slidably sleeved on the surface of the screw rod one, a pull plate is hinged to the right side of the top of the circular ring through an axis rod, a magnet sheet is fixedly connected to the top of the left side of the pull plate, the left side of the magnet sheet is attracted to the right side of the screw rod one, and the bottom of the circular ring is in contact with the top of the indicator plate.

[0012] In the above technical solution, preferably, a universal level is fixedly connected to the right side of the top of the transmission box, and a concave sleeve is fixedly connected to the top of the right side of the hand-cranked cross-over machine, and the concave sleeve is slidably sleeved on the surface of the screw sleeve.

[0013] In the above technical solution, preferably, the four corners of the top of the base plate are fixedly connected to limit rods, the top of the limit rods passes through the top of the lifting plate, and the four sides of the T-shaped rods are fixedly connected to reinforcement plates, and the top of the reinforcement plates is fixedly connected to the bottom of the top plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives screw two to rotate through the transmission device and screw one, and screw two lifts the hand-cranked jacking machine through the lifting plate and the universal wheel, which is convenient for pushing the equipment to move; at the same time, the screw sleeve drives the gear sleeve one to move upward and disengage from the gear sleeve two through the sleeve plate, which can facilitate the rotation of the top plate to align with the bearing point of the vehicle. After alignment, the lifting plate is driven upward to reset through the transmission device and screw two, and the screw sleeve drives the gear sleeve one downward through the sleeve plate to engage with the inside of the gear sleeve two to lock the angle of the top plate, thereby achieving the advantages of rapid alignment and positioning, improving the jacking efficiency and safety, reducing labor intensity, and making it convenient for the operator to rotate the handle with a suitable posture.

[0015] Furthermore, although the position of the hand-cranked straddle carrier can be easily adjusted through the universal wheel, it lacks intuitive positioning guidance and requires multiple manual adjustments of the equipment position, making it inconvenient to quickly place the hand-cranked straddle carrier in the appropriate position. However, through the structural design of the laser light, limit switch and battery box in the laser positioning tube, the limit switch can be triggered by moving the sleeve to start the laser light, and the position of the bottom of the vehicle can be marked with laser illumination, which assists the operator in quick alignment in advance, reduces the distance and amplitude of subsequent equipment adjustments, and improves positioning efficiency and accuracy.

[0016] Furthermore, although the bottom and top plate of the vehicle can be positioned by means of a laser light, when observing the supporting point position of the top plate and the bottom of the vehicle, the operator is easily required to bend over or even enter the bottom of the vehicle to observe due to the low bottom of the vehicle, which is inconvenient to operate and has poor safety. However, through the structural design of the rotating rod, support sleeve, mounting sleeve and lens in the observation assembly, the angle of the lens can be adjusted by rotating the mounting sleeve, so that the operator can observe the positional relationship between the top plate and the supporting point through the lens without bending over, thereby improving the convenience and safety of operation and reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic structural diagram of the hand-cranked straddle-jacking machine of the present invention; Figure 3 It is a structural schematic diagram of the screw sleeve of the present invention; Figure 4 It is a cross-sectional schematic diagram of the gear sleeve 2 of the present invention; Figure 5 Schematic cross-sectional view of the screw rod of the present invention; Figure 6Schematic cross-section of the transmission case of the present invention; Figure 7 It is a structural schematic diagram of the observation assembly of the present invention; Figure 8 It is a structural schematic diagram of the connecting sleeve of the present invention; Figure 9 Schematic diagram of the structure of the ring of the present invention; Figure 10 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0018] Figure: 1. Hand-cranked cross-jack; 2. Bottom plate; 3. Top plate; 4. Positioning member; 41. Transmission device; 411. Transmission box; 412. Worm; 413. Rotating plate; 414. Worm gear; 42. Screw rod 1; 43. Screw sleeve; 44. Sleeve plate; 45. Laser positioning cylinder; 451. Gear sleeve 1; 452. Gear sleeve 2; 453. T-bar; 454. Slider; 455. Slide; 456. Laser light; 457. Travel switch; 458. Battery box; 46. Hexagonal rod; 47. Indicator assembly ;471. Opening; 472. Scale groove; 473. Indicator plate; 48. Screw rod 2; 49. Connecting sleeve; 410. Lifting plate; 5. Observation assembly; 51. Rotating rod; 52. Support sleeve; 53. Mounting sleeve; 54. Lens; 6. Slide rail; 7. Slide sleeve; 8. Sponge pad; 9. Rubber soft magnetic strip; 10. Square flashlight; 11. Ring; 12. Pull plate; 13. Magnet sheet; 14. Universal level; 15. Concave sleeve; 16. Limit rod; 17. Reinforcement plate; 18. Universal wheel. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figures 1 to 3 As shown, the present invention provides a multifunctional hand-cranked cross-over jack, including a hand-cranked cross-over jack machine 1, the bottom of the hand-cranked cross-over jack machine 1 is fixedly connected to a bottom plate 2, the top of the hand-cranked cross-over jack machine 1 is provided with a top plate 3, and further comprising: The positioning member 4 is provided on the right side of the hand-cranked cross-lifting machine 1 and is used to quickly adjust the angle and position of the top plate 3; The positioning member 4 includes a transmission device 41, which is fixedly connected to the right side of the hand-cranked cross-jacking machine 1. A screw rod 42 is provided inside the transmission device 41. A screw sleeve 43 is threadedly connected to the top of the screw rod 42. A sleeve 44 is fixedly connected to the left side of the sleeve 43. A laser positioning tube 45 is provided inside the sleeve 44. The top of the laser positioning tube 45 is fixedly connected to the bottom of the top plate 3. A hexagonal rod 46 is slidably connected to the inside of the screw rod 42. An indicator component 47 is provided on the front of the screw rod 42. The bottom end of the hexagonal rod 46 is fixedly connected to a screw rod 48, and the bottom end of the screw rod 48 is fixedly connected to the inside of the base plate 2 through a bearing. The surface of the screw rod 48 is threadedly connected to a connecting sleeve 49, and the right side of the connecting sleeve 49 is fixedly connected to a lifting plate 410, and the four corners of the lifting plate 410 are fixedly connected to universal wheels 18.

[0021] Specifically, the thread rotation directions of screw 1 42 and screw 2 48 are opposite. The hand-cranked cross-lifting machine 1 is mainly composed of a shell, a gear transmission mechanism, a foldable handle, a pawl locking device, a toothed plate and other structures. The hand-cranked cross-lifting machine 1 belongs to the existing mature technical application; the bottom of the universal wheel 18 is flush with the bottom of the base plate 2, and the lifting plate 410 is sleeved on the surface of the base plate 2. The front and back sides of the connecting sleeve 49 are fixedly connected with a connecting plate, and the left end of the connecting plate is fixedly connected to the left side of the inner wall of the lifting plate 410. The connecting plate can increase the connection strength between the connecting sleeve 49 and the lifting plate 410. By setting the universal wheel 18, it is convenient for the user to fine-tune the hand-cranked cross-lifting machine 1 during the jacking process.

[0022] like Figures 3 to 6 As shown, the transmission device 41 includes a transmission box 411, a screw 42 is fixedly connected to the inside of the transmission box 411 through a bearing, a worm 412 is fixedly connected to the inside of the transmission box 411 through a bearing, a front end of the worm 412 is fixedly connected to a rotating plate 413, and the surface of the screw 42 is fixedly connected to a worm wheel 414 located inside the transmission box 411, and the worm 412 is meshed with the worm wheel 414.

[0023] Specifically, through the engagement of the worm 412 and the worm wheel 414, power can be efficiently transmitted to the screw 42, thereby achieving stable rotation of the screw 42, thereby driving the operation of subsequent structures, saving operation, and being a sealed design, effectively preventing external impurities from affecting the worm 412 and the worm wheel 414.

[0024] like Figures 3 and 4 As shown, the laser positioning cylinder 45 includes a gear sleeve 451, which is slidably connected to the inside of the sleeve plate 44. The top of the hand-cranked cross-lift machine 1 is fixedly connected to a gear sleeve 452. The bottom of the gear sleeve 451 is engaged with the top of the gear sleeve 452. The inside of the gear sleeve 452 is slidably connected to a T-shaped rod 453. The top of the T-shaped rod 453 is fixedly connected to the bottom of the top plate 3. Slide blocks 454 are fixedly connected to the front and rear sides of the inner wall of the gear sleeve 451. Slide grooves 455 are formed on the front and rear sides of the T-shaped rod 453. The slide blocks 454 are slidably connected to the inside of the slide grooves 455. A laser lamp 456 is fixedly connected to the bottom of the inner wall of the gear sleeve 452, and the T-shaped rod 453 is sleeved on the surface of the laser lamp 456. The top of the laser lamp 456 passes through the inside of the top plate 3. A limit switch 457 is fixedly connected to the right side of the top of the hand-cranked cross-top machine 1. The top of the limit switch 457 contacts the bottom of the sleeve 44, and the front of the screw sleeve 43 is fixedly connected to the battery box 458.

[0025] Specifically, the laser light 456 is a laser pen, which is mainly composed of a semiconductor laser diode and a focusing lens. It is an existing mature technology application. The battery box 458 is electrically connected to the limit switch 457, and the limit switch 457 is electrically connected to the limit switch 457; the linkage between the limit switch 457 and the sleeve 44 can realize the intelligent opening and closing of the laser light 456, saving electricity. The battery box 458 is set to power the laser light 456 and the limit switch 457 to ensure continuous and stable operation of the device and convenient operation.

[0026] like Figures 7 to 10 As shown, an observation assembly 5 is provided on the front of the hand-cranked cross-top machine 1, and the observation assembly 5 includes a rotating rod 51. The top and bottom of the surface of the rotating rod 51 are both provided with support sleeves 52, and the back of the support sleeve 52 is fixedly connected to the surface of the hand-cranked cross-top machine 1. The right side of the surface of the rotating rod 51 is slidably sleeved with a mounting sleeve 53, and the interior of the mounting sleeve 53 is fixedly connected to a lens 54.

[0027] Specifically, the mounting sleeve 53 can rotate along the rotating rod 51, and the rotating rod 51 can rotate along the supporting sleeve 52, thereby driving the lens 54 to rotate at multiple angles, so that the operator does not need to bend over to observe under the vehicle. The relative position of the top plate 3 and the vehicle bearing point can be viewed through the lens 54 in a safe position, which reduces the fatigue and potential safety risks caused by the operator's frequent adjustment of the observation posture, and improves the convenience, safety and alignment efficiency of operation.

[0028] like Figure 10 As shown, both sides of the top of the mounting sleeve 53 are fixedly connected to the slide rails 6, the front side of the top of the mounting sleeve 53 is provided with a slide sleeve 7, both sides of the bottom of the slide sleeve 7 are slidably sleeved on the surface of the slide rails 6, and the bottom of the slide sleeve 7 is fixedly connected to a sponge pad 8.

[0029] Specifically, during use, the operator can slide the sleeve 7 and use the sponge pad 8 to clean the lens 54, quickly remove dust, stains or water stains on the surface of the lens 54, maintain the clarity of the lens 54, avoid the blurring of the lens 54 affecting the observation effect, and do not need to use additional cleaning tools, thereby ensuring that the observation component 5 can function stably and long-term.

[0030] like Figure 10 As shown, a rubber soft magnetic strip 9 is fixedly connected to the top of the slide rail 6 , and a square flashlight 10 is fixedly connected to the front of the mounting sleeve 53 .

[0031] Specifically, the rubber soft magnetic strip 9 can be magnetically adsorbed with the hand-cranked cross-top machine 1, thereby fixing the position of the mounting sleeve 53 and the lens 54 to prevent them from rotating, effectively protecting the lens 54, and the square flashlight 10 can provide lighting when working in dim light or at night, assisting the operator to clearly observe the top plate 3 and the vehicle's bearing point position, further enhancing the environmental adaptability of the observation component 5, and reducing positioning errors caused by insufficient light.

[0032] like Figure 2 and Figure 9 As shown, the indicator assembly 47 includes an opening 471, which is opened on the front side of the screw rod 42, and scale grooves 472 are opened on both sides of the inner wall of the opening 471. The top of the front side of the hexagonal rod 46 is fixedly connected to an indicator plate 473, and the indicator plate 473 is slidably connected to the inside of the opening 471.

[0033] Specifically, when the hand-cranked jacking machine 1 is in the above position, the operator can visually observe the displacement of the top plate 3 through the indicator plate 473 and the scale groove 472, which is convenient for the operator to accurately control the jacking height. The operator does not need to rely on experience to judge the jacking height, avoiding vehicle position deviation or damage due to excessive adjustment.

[0034] like Figure 9 As shown, a ring 11 is slidably sleeved on the surface of the screw 42, and a pull plate 12 is hinged to the right side of the top of the ring 11 through an axis rod. A magnet sheet 13 is fixedly connected to the top of the left side of the pull plate 12. The left side of the magnet sheet 13 is attracted to the right side of the screw 42, and the bottom of the ring 11 is in contact with the top of the indicator plate 473.

[0035] Specifically, when the top plate 3 contacts the bottom of the vehicle, the ring 11 can be fixed by the magnet sheet 13, so that the ring 11 can be used as a height reference. During the subsequent jacking process, the operator only needs to observe the numerical changes of the scale groove 472 between the ring 11 and the indicator plate 473 to intuitively and accurately grasp the real-time jacking height of the top plate 3, thereby reducing the safety risks and equipment losses caused by improper height control.

[0036] like Figure 2 As shown, a universal level 14 is fixedly connected to the right side of the top of the transmission box 411 , and a concave sleeve 15 is fixedly connected to the top of the right side of the hand-cranked jacking machine 1 , and the concave sleeve 15 is slidably sleeved on the surface of the screw sleeve 43 .

[0037] Specifically, the universal level 14 can display the horizontal state of the hand-cranked step-up machine 1, helping the operator to promptly detect the tilt problem of the hand-cranked step-up machine 1, ensuring that it maintains balance during the jacking process, and avoiding uneven force, vehicle damage or safety hazards caused by the tilt of the hand-cranked step-up machine 1; and the concave sleeve 15 can provide a stable guide for the lifting and lowering movement of the screw sleeve 43, preventing it from deflecting or shaking during movement.

[0038] like Figures 1 to 3 As shown, the four corners of the top of the base plate 2 are fixedly connected to the limiting rod 16, the top of the limiting rod 16 passes through the top of the lifting plate 410, and the four sides of the T-shaped rod 453 are fixedly connected to the reinforcement plate 17, and the top of the reinforcement plate 17 is fixedly connected to the bottom of the top plate 3.

[0039] Specifically, the limit rod 16 can provide guidance and limitation for the vertical lifting of the lifting plate 410, effectively preventing it from shifting during the lifting process, and improving the stability of the hand-cranked cross-top machine 1 when adjusting the position; the T-shaped rod 453 enhances the connection strength between the top plate 3 and the T-shaped rod 453, and improves the carrying capacity.

[0040] The working principle and use process of the present invention: The user first rotates the rotating plate 413, which drives the worm 412 to rotate. The worm 412 drives the screw 1 42 to rotate through the worm gear 414. The screw 1 42 drives the gear sleeve 1 451 to move upward through the screw sleeve 43 and the sleeve plate 44, so that the gear sleeve 1 451 and the gear sleeve 2 452 are disengaged. At the same time, the screw 1 42 drives the screw 2 48 to rotate through the hexagonal rod 46. The screw 2 48 drives the lifting plate 410 to descend through the connecting sleeve 49. The lifting plate 410 is moved downward by the universal wheel 18. The hand-cranked cross-lifting machine 1 is lifted up, and then the user can easily push the hand-cranked cross-lifting machine 1 to adjust its position, and at the same time rotate the top plate 3, which drives the gear sleeve 1 451 to rotate through the T-shaped rod 453 and the slider 454. When the top plate 3 is aligned with the bearing point at the bottom of the vehicle, the handle of the hand-cranked cross-lifting machine 1 is turned, and the shell of the hand-cranked cross-lifting machine 1 will move upward, and the gear sleeve 2 452 and the T-shaped rod 453 drive the top plate 3 to move upward. At the same time, the shell of the hand-cranked cross-lifting machine 1 drives the screw 1 42 through the transmission box 411. When the top plate 3 is moved upward, since the bottom end of the screw rod 2 48 is fixedly connected to the inside of the bottom plate 2 by a bearing, the screw rod 2 48 and the hexagonal rod 46 will not move upward, while the screw rod 1 42 will slide on the surface of the hexagonal rod 46. When the top of the top plate 3 contacts the bearing point at the bottom of the vehicle, the rotating plate 413 is rotated in the opposite direction. The rotating plate 413 drives the screw rod 1 42 to rotate in the opposite direction through the worm 412 and the worm gear 414. The worm gear 414 drives the sleeve plate 44 to move downward through the screw rod 1 42 and the screw sleeve 43. The gear sleeve 1 451 is meshed with the gear sleeve 2 452 and the T-shaped rod 453 is fixed at an angle through the slider 454 and the slide groove 455 to prevent the top plate 3 from rotating. At the same time, the screw rod 1 42 will drive the screw rod 2 48 to rotate through the hexagonal rod 46, and the screw rod 2 48 will drive the lifting plate 410 to rise and reset through the connecting sleeve 49. The bottom plate 2 will contact the ground and support the hand-cranked cross-lifting machine 1. Finally, the handle of the hand-cranked cross-lifting machine 1 can be continued to be rotated to perform the jacking operation, thereby achieving the effect of rapid alignment and positioning.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional hand-cranked cross-over, comprising a hand-cranked cross-over machine (1), wherein the bottom of the hand-cranked cross-over machine (1) is fixedly connected to a bottom plate (2), and the top of the hand-cranked cross-over machine (1) is provided with a top plate (3), characterized in that: Also includes: A positioning member (4) is provided on the right side of the hand-cranked cross-top machine (1) and is used to quickly adjust the angle and position of the top plate (3); The positioning member (4) includes a transmission device (41), the transmission device (41) is fixedly connected to the right side of the hand-cranked cross-top machine (1), a screw rod (42) is provided inside the transmission device (41), the top of the surface of the screw rod (42) is threadedly connected to a screw sleeve (43), the left side of the screw sleeve (43) is fixedly connected to a sleeve plate (44), a laser positioning tube (45) is provided inside the sleeve plate (44), the top of the laser positioning tube (45) is fixedly connected to the bottom of the top plate (3), the inside of the screw rod (42) is slidably connected to a hexagonal rod (46), and the front of the screw rod (42) is provided with an indicator component (47); The bottom end of the hexagonal rod (46) is fixedly connected to a second screw rod (48), the bottom end of the second screw rod (48) is fixedly connected to the inside of the bottom plate (2) through a bearing, the surface of the second screw rod (48) is threadedly connected to a connecting sleeve (49), the right side of the connecting sleeve (49) is fixedly connected to a lifting plate (410), and the four corners of the lifting plate (410) are fixedly connected to universal wheels (18).

2. A multifunctional hand-cranked span roof according to claim 1, characterized in that: The transmission device (41) includes a transmission box (411), the screw rod (42) is fixedly connected to the interior of the transmission box (411) via a bearing, the interior of the transmission box (411) is fixedly connected to a worm (412) via a bearing, the front end of the worm (412) is fixedly connected to a rotating plate (413), the surface of the screw rod (42) is fixedly connected to a worm wheel (414) located inside the transmission box (411), and the worm (412) is meshed with the worm wheel (414).

3. The multifunctional hand-cranked span roof according to claim 1, characterized in that: The laser positioning cylinder (45) includes a gear sleeve (451) which is slidably connected to the inside of the sleeve plate (44); the top of the hand-cranked cross-top machine (1) is fixedly connected to a gear sleeve (452); the bottom of the gear sleeve (451) is engaged with the top of the gear sleeve (452); the inside of the gear sleeve (452) is slidably connected to a T-shaped rod (453); the top of the T-shaped rod (453) is fixedly connected to the bottom of the top plate (3); The front and rear sides of the inner wall of the gear sleeve (451) are fixedly connected with a slider (454), the front and rear sides of the T-shaped rod (453) are provided with a slide groove (455), and the slider (454) is slidably connected inside the slide groove (455); The bottom of the inner wall of the second gear sleeve (452) is fixedly connected to a laser lamp (456), the T-shaped rod (453) is sleeved on the surface of the laser lamp (456), the top of the laser lamp (456) penetrates into the interior of the top plate (3), the right side of the top of the hand-cranked cross-top machine (1) is fixedly connected to a travel switch (457), the top of the travel switch (457) contacts the bottom of the sleeve plate (44), and the front of the screw sleeve (43) is fixedly connected to a battery box (458).

4. The multifunctional hand-cranked span roof according to claim 1, characterized in that: The front of the hand-cranked cross-top machine (1) is provided with an observation assembly (5), and the observation assembly (5) comprises a rotating rod (51), the top and bottom of the surface of the rotating rod (51) are both sleeved with a support sleeve (52), the back of the support sleeve (52) is fixedly connected to the surface of the hand-cranked cross-top machine (1), and the right side of the surface of the rotating rod (51) is slidably sleeved with a mounting sleeve (53), and the interior of the mounting sleeve (53) is fixedly connected with a lens (54).

5. The multifunctional hand-cranked span roof according to claim 4, characterized in that: Both sides of the top of the installation sleeve (53) are fixedly connected to the slide rails (6), the front side of the top of the installation sleeve (53) is provided with a slide sleeve (7), both sides of the bottom of the slide sleeve (7) are slidably sleeved on the surface of the slide rails (6), and the bottom of the slide sleeve (7) is fixedly connected to a sponge pad (8).

6. The multifunctional hand-cranked span roof according to claim 5, characterized in that: A rubber soft magnetic strip (9) is fixedly connected to the top of the slide rail (6), and a square flashlight (10) is fixedly connected to the front of the mounting sleeve (53).

7. The multifunctional hand-cranked span roof according to claim 1, characterized in that: The indicating assembly (47) includes an opening (471), the opening (471) is opened on the front side of the screw rod (42), and scale grooves (472) are opened on both sides of the inner wall of the opening (471). The top of the front side of the hexagonal rod (46) is fixedly connected to an indicating plate (473), and the indicating plate (473) is slidably connected to the inside of the opening (471).

8. The multifunctional hand-cranked span roof according to claim 7, characterized in that: The surface of the screw rod (42) is slidably sleeved with a ring (11), the right side of the top of the ring (11) is hinged with a pull plate (12) through a shaft, the top of the left side of the pull plate (12) is fixedly connected with a magnet sheet (13), the left side of the magnet sheet (13) is attracted to the right side of the screw rod (42), and the bottom of the ring (11) is in contact with the top of the indicator plate (473).

9. The multifunctional hand-cranked span roof according to claim 2, characterized in that: A universal level (14) is fixedly connected to the right side of the top of the transmission box (411), and a concave sleeve (15) is fixedly connected to the top of the right side of the hand-cranked cross-over machine (1). The concave sleeve (15) is slidably sleeved on the surface of the screw sleeve (43).

10. The multifunctional hand-cranked span roof according to claim 3, characterized in that: The four corners of the top of the bottom plate (2) are fixedly connected to limiting rods (16), the top ends of the limiting rods (16) extend through the top of the lifting plate (410), and the four sides of the T-shaped rod (453) are fixedly connected to reinforcing plates (17), the top of the reinforcing plates (17) is fixedly connected to the bottom of the top plate (3).

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