Gear and rack lifting mechanism

Abstract

The invention discloses a gear and rack lifting mechanism which comprises a mounting box and a bracket located above the mounting box, a rack is arranged in the mounting box in an up-down sliding mode, the top of the rack penetrates through the mounting box and extends to the outside of the mounting box, and the invention relates to the technical field of lifting mechanisms. According to the gear and rack lifting mechanism, the rack is arranged in the mounting box in an up-down sliding mode, the meshing state between the first gear and the rack is utilized, the control mechanism is arranged on the mounting box in a matched mode, and the control mechanism controls the rotating shaft to rotate, so that the first gear drives the rack to ascend and descend; compared with a traditional direct gear and rack meshing transmission process, other gears, ratchet wheels and pawls are involved, stability is higher, the lifting height can be automatically locked, manual operation is not needed, operation can be rapidly conducted when the locking state is unlocked, and the novel gear and rack lifting mechanism is higher in practicability.

Description

Technical Field

[0001] The invention relates to the technical field of lifting mechanisms, in particular to a gear rack lifting mechanism. Background Art

[0002] The existing rack and pinion lifting method only uses the rack and pinion meshing method for lifting transmission, which means that after the lifting height is determined, the state at that time needs to be locked. Since the height is constantly changing, it is necessary to set up several locking structures, which makes the lifting mechanism extremely complicated. Moreover, only the rack and pinion meshing is used, which causes the overall stability to completely rely on the meshing teeth, resulting in poor stability. Therefore, the present invention proposes a rack and pinion lifting mechanism to solve the above-mentioned problems. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present invention provides a gear rack lifting mechanism to solve the problems mentioned in the above background technology.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a gear rack lifting mechanism, comprising an installation box and a bracket located above the installation box, the interior of the installation box is slidably provided with a rack, the top of the rack penetrates the installation box and extends to the outside of the installation box, the top of the rack is fixedly connected to the bottom of the bracket, a first gear is provided on one side of the rack, and the first gear is meshed with the rack, the interior of the installation box is rotatably connected with a rotating shaft, the outer surface of the rotating shaft is fixedly connected to the inner surface of the first gear, and a control mechanism is provided on the installation box, the control mechanism is used to control the rotation of the rotating shaft so that the first gear drives the rack to rise and fall.

[0007] As an improved technical solution, the bottom of the rack is fixedly connected to a limit plate, a limit groove is provided on one side of the inner wall of the installation box, and the outer surface of the limit plate is slidably connected to the inner surface of the limit groove.

[0008] As an improved technical solution, the control mechanism includes a second gear fixedly connected to the surface of the rotating shaft, and the second gear is located on one side of the first gear. A rotating rod is rotatably connected inside the mounting box and located above the rotating shaft. A third gear is fixedly connected to the outer surface of the rotating rod, and the third gear is meshed with the second gear.

[0009] As an improved technical solution, one end of the rotating rod passes through the installation box and is located outside the installation box, a ratchet is fixedly provided on the outer surface of the rotating rod and located outside the installation box, one end of the rotating rod is fixedly connected to a handle, and an adjustment component is provided on the ratchet, which is used to release the limiting effect of the ratchet.

[0010] As an improved technical solution, the adjustment assembly includes a pawl rotatably connected to the surface of the mounting box, one side of the pawl resists on the ratchet to limit the rotation of the ratchet, the surface of the mounting box is fixedly connected to a mounting plate, one side of the mounting plate is fixedly connected to a spring, and one end of the spring is fixedly connected to the bottom of the pawl.

[0011] As an improved technical solution, a first fixed pulley is fixedly connected to the surface of the installation box, a second fixed pulley is fixedly connected to the surface of the installation box and located below the first fixed pulley, and a third fixed pulley is fixedly connected to the surface of the installation box and located below the second fixed pulley.

[0012] As an improved technical solution, a traction line is fixedly connected to the top of the pawl, and the traction line is turned through the first fixed pulley, the second fixed pulley and the third fixed pulley in sequence.

[0013] As an improved technical solution, one end of the traction line passes through the mounting plate and extends to the outside of the mounting plate, and one end of the traction line is fixedly connected to a pull ring.

[0014] (III) Beneficial effects

[0015] The present invention provides a gear rack lifting mechanism. Compared with the prior art, the gear rack lifting mechanism has the following beneficial effects: the gear rack lifting mechanism is provided with a rack that can slide up and down inside the installation box, and utilizes the meshing state between the first gear and the rack, and cooperates with the control mechanism provided on the installation box, and utilizes the control mechanism to control the rotation of the rotating shaft, so that the first gear drives the rack to rise and fall. Compared with the traditional direct meshing transmission process of the gear rack, the remaining gears and ratchet pawls are involved, and the stability is stronger, and the lifting height can be automatically locked without manual operation. When the locking state is released, it can also be operated quickly. The new gear rack lifting mechanism is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the external structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 The main view;

[0018] Figure 3 For the present invention Figure 1 Left view of

[0019] Figure 4 For the present invention Figure 1 A top view of

[0020] Figure 5 It is a three-dimensional diagram of the internal structure of the present invention;

[0021] Figure 6 For the present invention Figure 5 A three-dimensional diagram of the local structure;

[0022] Figure 7 For the present invention Figure 6 A three-dimensional diagram of the local structure.

[0023] In the figure, 1-installation box, 2-bracket, 3-rack, 4-first gear, 5-rotating shaft, 6-limiting plate, 7-limiting groove, 8-second gear, 9-rotating rod, 10-third gear, 11-ratchet, 12-handle, 13-pawl, 14-installation plate, 15-spring, 16-first fixed pulley, 17-second fixed pulley, 18-third fixed pulley, 19-traction line, 20-pull ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-7 , the embodiment of the present invention provides three technical solutions:

[0026] Embodiment 1: A gear rack lifting mechanism comprises an installation box 1 and a bracket 2 located above the installation box 1, a rack 3 is slidably provided inside the installation box 1, the top of the rack 3 penetrates the installation box 1 and extends to the outside of the installation box 1, the top of the rack 3 is fixedly connected to the bottom of the bracket 2, a first gear 4 is provided on one side of the rack 3, and the first gear 4 is meshed with the rack 3, a rotating shaft 5 is rotatably connected inside the installation box 1, and the outer surface of the rotating shaft 5 is fixedly connected to the inner surface of the first gear 4, and a control mechanism is provided on the installation box 1, and the control mechanism is used to control the rotation of the rotating shaft 5 so that the first gear 4 drives the rack 3 to rise and fall.

[0027] A further solution is that a limiting plate 6 is fixedly connected to the bottom of the rack 3, and a limiting groove 7 is opened on one side of the inner wall of the installation box 1. The outer surface of the limiting plate 6 is slidably connected to the inner surface of the limiting groove 7. The setting of the limiting groove 7 and the limiting plate 6 can enhance the stability of the rack 3 during the movement.

[0028] A further solution is that the control mechanism includes a second gear 8 fixedly connected to the surface of the rotating shaft 5, and the second gear 8 is located on one side of the first gear 4, and a rotating rod 9 is rotatably connected inside the installation box 1 and located above the rotating shaft 5, and a third gear 10 is fixedly connected to the outer surface of the rotating rod 9, and the third gear 10 is meshed with the second gear 8, one end of the rotating rod 9 passes through the installation box 1 and is located outside the installation box 1, and a ratchet 11 is fixedly provided on the outer surface of the rotating rod 9 and located outside the installation box 1, and a handle 12 is fixedly connected to one end of the rotating rod 9, and an adjustment component is provided on the ratchet 11, and the adjustment component is used to release the limiting effect of the ratchet 11.

[0029] According to a further solution, the adjustment component includes a pawl 13 rotatably connected to the surface of the mounting box 1, one side of the pawl 13 resists on the ratchet 11 to limit the rotation of the ratchet 11, a mounting plate 14 is fixedly connected to the surface of the mounting box 1, a spring 15 is fixedly connected to one side of the mounting plate 14, and one end of the spring 15 is fixedly connected to the bottom of the pawl 13, a first fixed pulley 16 is fixedly connected to the surface of the mounting box 1, a second fixed pulley 17 is fixedly connected to the surface of the mounting box 1 and located below the first fixed pulley 16, a third fixed pulley 18 is fixedly connected to the surface of the mounting box 1 and located below the second fixed pulley 17, a traction line 19 is fixedly connected to the top of the pawl 13, the traction line 19 turns through the first fixed pulley 16, the second fixed pulley 17 and the third fixed pulley 18 in sequence, one end of the traction line 19 passes through the mounting plate 14 and extends to the outside of the mounting plate 14, and one end of the traction line 19 is fixedly connected to a pull ring 20.

[0030] When in use, first turn the handle 12, and use the rotation of the handle 12 to drive the rotating rod 9 to rotate. The rotation of the rotating rod 9 then drives the third gear 10 to rotate. The rotation of the third gear 10 further drives the second gear 8 to rotate. The rotation of the second gear 8 causes the rotating shaft 5 to rotate. Under the action of the rotation of the rotating shaft 5, the first gear 4 rotates. The rotation of the first gear 4 then drives the meshing rack 3 to move upward. During the rotation of the handle 12, the ratchet 11 rotates synchronously with the rotating rod 9. During the rotation of the ratchet 11, the pawl 13 is used to limit the position. When the rack 3 needs to be lowered, it is only necessary to pull the pull ring 20 to one side, and use the pull ring 20 to drive the traction line 19 to move to one side. The traction line 19 passes through the first fixed pulley 16, the second fixed pulley 17 and the third fixed pulley 18 in turn to turn, and the traction line 19 drives the pawl 13 to rotate. At this time, the pawl 13 releases the limiting effect on the ratchet 11, and the rack 3 moves downward under the action of gravity.

[0031] Embodiment 2: A gear rack lifting mechanism comprises an installation box 1 and a bracket 2 located above the installation box 1, a rack 3 is slidably provided inside the installation box 1, the top of the rack 3 penetrates the installation box 1 and extends to the outside of the installation box 1, the top of the rack 3 is fixedly connected to the bottom of the bracket 2, a first gear 4 is provided on one side of the rack 3, and the first gear 4 is meshed with the rack 3, a rotating shaft 5 is rotatably connected inside the installation box 1, and the outer surface of the rotating shaft 5 is fixedly connected to the inner surface of the first gear 4, and a control mechanism is provided on the installation box 1, and the control mechanism is used to control the rotation of the rotating shaft 5 so that the first gear 4 drives the rack 3 to rise and fall.

[0032] A further solution is that the control mechanism includes a second gear 8 fixedly connected to the surface of the rotating shaft 5, and the second gear 8 is located on one side of the first gear 4, and a rotating rod 9 is rotatably connected inside the installation box 1 and located above the rotating shaft 5, and a third gear 10 is fixedly connected to the outer surface of the rotating rod 9, and the third gear 10 is meshed with the second gear 8, one end of the rotating rod 9 passes through the installation box 1 and is located outside the installation box 1, and a ratchet 11 is fixedly provided on the outer surface of the rotating rod 9 and located outside the installation box 1, and a handle 12 is fixedly connected to one end of the rotating rod 9, and an adjustment component is provided on the ratchet 11, and the adjustment component is used to release the limiting effect of the ratchet 11.

[0033] Embodiment 3: A gear rack lifting mechanism comprises an installation box 1 and a bracket 2 located above the installation box 1, a rack 3 is slidably provided inside the installation box 1, the top of the rack 3 penetrates the installation box 1 and extends to the outside of the installation box 1, the top of the rack 3 is fixedly connected to the bottom of the bracket 2, a first gear 4 is provided on one side of the rack 3, and the first gear 4 is meshed with the rack 3, a rotating shaft 5 is rotatably connected inside the installation box 1, and the outer surface of the rotating shaft 5 is fixedly connected to the inner surface of the first gear 4, and a control mechanism is provided on the installation box 1, and the control mechanism is used to control the rotation of the rotating shaft 5 so that the first gear 4 drives the rack 3 to rise and fall.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rack and pinion lifting mechanism, comprising a mounting box (1) and a bracket (2) located above the mounting box (1), characterized in that: A rack (3) is provided inside the installation box (1) so as to slide up and down. The top of the rack (3) penetrates the installation box (1) and extends to the outside of the installation box (1). The top of the rack (3) is fixedly connected to the bottom of the bracket (2). A first gear (4) is provided on one side of the rack (3), and the first gear (4) is meshed with the rack (3). A rotating shaft (5) is rotatably connected inside the installation box (1). The outer surface of the rotating shaft (5) is fixedly connected to the inner surface of the first gear (4). A control mechanism is provided on the installation box (1). The control mechanism is used to control the rotation of the rotating shaft (5) so that the first gear (4) drives the rack (3) to rise and fall.

2. The rack and pinion lifting mechanism according to claim 1, characterized in that: The bottom of the rack (3) is fixedly connected to a limiting plate (6), one side of the inner wall of the installation box (1) is provided with a limiting groove (7), and the outer surface of the limiting plate (6) is slidably connected to the inner surface of the limiting groove (7).

3. The rack and pinion lifting mechanism according to claim 1, characterized in that: The control mechanism comprises a second gear (8) fixedly connected to the surface of the rotating shaft (5), and the second gear (8) is located on one side of the first gear (4); a rotating rod (9) is rotatably connected inside the installation box (1) and located above the rotating shaft (5); a third gear (10) is fixedly connected to the outer surface of the rotating rod (9), and the third gear (10) is meshed with the second gear (8).

4. The rack and pinion lifting mechanism according to claim 3, characterized in that: One end of the rotating rod (9) passes through the installation box (1) and is located outside the installation box (1); a ratchet (11) is fixedly provided on the outer surface of the rotating rod (9) and located outside the installation box (1); one end of the rotating rod (9) is fixedly connected to a handle (12); an adjustment component is provided on the ratchet (11), and the adjustment component is used to release the limiting effect of the ratchet (11).

5. The rack and pinion lifting mechanism according to claim 4, characterized in that: The adjustment assembly comprises a pawl (13) rotatably connected to the surface of the installation box (1), one side of the pawl (13) resists against the ratchet (11) to limit the rotation of the ratchet (11), the surface of the installation box (1) is fixedly connected to a mounting plate (14), one side of the mounting plate (14) is fixedly connected to a spring (15), and one end of the spring (15) is fixedly connected to the bottom of the pawl (13).

6. The rack and pinion lifting mechanism according to claim 5, characterized in that: A first fixed pulley (16) is fixedly connected to the surface of the installation box (1), a second fixed pulley (17) is fixedly connected to the surface of the installation box (1) and located below the first fixed pulley (16), and a third fixed pulley (18) is fixedly connected to the surface of the installation box (1) and located below the second fixed pulley (17).

7. The rack and pinion lifting mechanism according to claim 6, characterized in that: A traction line (19) is fixedly connected to the top of the ratchet pawl (13), and the traction line (19) is turned sequentially through the first fixed pulley (16), the second fixed pulley (17) and the third fixed pulley (18).

8. The rack and pinion lifting mechanism according to claim 7, characterized in that: One end of the pulling wire (19) passes through the mounting plate (14) and extends to the outside of the mounting plate (14), and one end of the pulling wire (19) is fixedly connected to a pull ring (20).

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