Speed increasing mechanism

Abstract

The invention discloses a speed increasing mechanism. The speed increasing mechanism comprises a driving shaft, a transition shaft and a driven shaft, the first gear is fixedly arranged on the outer side of the driving shaft; the rack is arranged on the inner top surface of the shell in a sliding manner, and the rack is meshed with the first gear; the driving assembly is used for driving the rack to reciprocate; the first speed-up transmission assembly is connected between the driving shaft and the transition shaft; and the second speed-up transmission assembly is connected between the transition shaft and the driven shaft. The device has the beneficial effects that reciprocating forward rotation and reverse rotation of the driving shaft are achieved through reciprocating driving of the rack, one-way driving rotation is conducted on the transition shaft through the first speed-up transmission assembly, linear motion is changed into rotary motion, the driven shaft is driven to rotate and transmit through the second speed-up transmission assembly, meanwhile, the transmission speed can be increased, and the speed-up effect is achieved; the power of the driving assembly can be reduced, the energy-saving and environment-friendly effects are achieved, and the equipment cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of drive mechanisms, and particularly to a speed increasing mechanism. Background Art

[0002] When driving high-power moving bodies such as generator piston pumps, a corresponding high-power drive motor or the like is required for normal operation. For example, a 6-megawatt piston pump needs to be driven by a 270-kilowatt motor to operate; this increases the cost of the drive equipment and has high energy consumption, and cannot meet the development concept of energy conservation and environmental protection. Summary of the Invention

[0003] The purpose of the present invention is to provide a speed increasing mechanism to solve the above problems, as described in detail below.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A speed increasing mechanism provided by the present invention includes:

[0006] A driving shaft, an intermediate shaft, and a driven shaft rotatably installed inside the housing;

[0007] A first gear fixedly arranged outside the driving shaft;

[0008] A rack slidably arranged on the inner top surface of the housing, and the rack meshes with the first gear;

[0009] A driving assembly for driving the rack to reciprocate;

[0010] A first speed increasing transmission assembly connected between the driving shaft and the intermediate shaft. When the driving shaft rotates forward, the first speed increasing transmission assembly drives the intermediate shaft to rotate forward. When the driving shaft rotates reversely, the first speed increasing transmission assembly disengages and does not drive the intermediate shaft to rotate;

[0011] A second speed increasing transmission assembly connected between the intermediate shaft and the driven shaft to drive the driven shaft to rotate synchronously with the intermediate shaft.

[0012] Optionally, two sets of driving assemblies are provided, and the two sets of driving assemblies are respectively connected to both ends of the rack in the length direction.

[0013] Optionally, the driving assembly includes:

[0014] A hydraulic cylinder, the output end of which is connected to the rack;

[0015] A hydraulic pump, which forms an oil supply circuit with the hydraulic cylinder through an oil pipe;

[0016] A drive motor, the output end of the drive motor being connected to the hydraulic pump.

[0017] Optionally, the first speed increasing transmission assembly includes:

[0018] A second gear rotatably connected to the driving shaft;

[0019] A third gear connected to the intermediate shaft, the third gear meshing with the second gear, the number of teeth of the third gear being less than the number of teeth of the second gear;

[0020] A transmission disc connected to the driving shaft;

[0021] A plurality of one-way transmission assemblies, the plurality of one-way transmission assemblies being circumferentially and uniformly distributed on the side surface of the transmission disc, and the plurality of one-way transmission assemblies being in transmission engagement with the second gear. When the driving shaft rotates forward, the plurality of one-way transmission assemblies are in transmission engagement with the second gear to drive the second gear to rotate forward along with the driving shaft. When the driving shaft rotates reversely, the plurality of one-way transmission assemblies are disengaged from the second gear.

[0022] Optionally, there are two transmission discs, and the two transmission discs are respectively located on both sides of the second gear.

[0023] Optionally, the plurality of one-way transmission assemblies includes:

[0024] A plurality of receiving cavities, the plurality of receiving cavities being circumferentially and uniformly distributed on the side surface of the transmission disc;

[0025] Springs arranged inside the plurality of receiving cavities;

[0026] Drive blocks slidably arranged inside the plurality of receiving cavities, the cross section of the drive blocks being square structures, and the drive blocks being in sliding fit with the receiving cavities. The outer ends of the drive blocks are inserted and fitted with the transmission holes on the side surface of the second gear. A first inclined surface is arranged at the outer end of the drive block, and the first inclined surface is adapted to a second inclined surface inside the transmission hole.

[0027] Optionally, positioning holes are arranged at the inner ends of the drive blocks, and the springs extend into the positioning holes.

[0028] Optionally, it further includes:

[0029] A fixed frame, the fixed frame being connected to the inner top surface of the housing;

[0030] The upper surface of the rack penetrates through the guiding groove at the bottom surface of the fixed frame and extends into the fixed frame;

[0031] A bearing plate formed on the upper surface of the rack;

[0032] Multiple recessed holes are evenly distributed along the length direction of the rack on the bottom surface of the bearing plate. There are two groups of multiple recessed holes, and the two groups of multiple recessed holes are symmetrically distributed on both sides of the rack.

[0033] Steel balls embedded in multiple recessed holes, and the steel balls are in contact with the inner bottom surface of the fixed frame.

[0034] Optionally, there are two first gears, and the two first gears are respectively close to both ends of the driving shaft.

[0035] There are two fixed frames and the racks. The two racks are respectively engaged with the two first gears.

[0036] Optionally, the second speed increasing transmission component includes:

[0037] A fourth gear connected to the intermediate shaft;

[0038] A fifth gear connected to the driven shaft. The fifth gear is engaged with the fourth gear, and the number of teeth of the fourth gear is greater than that of the fifth gear.

[0039] The beneficial effects are as follows: Through the reciprocating drive of the rack, the reciprocating forward and reverse rotations of the driving shaft are realized. Through the first speed increasing transmission component, the intermediate shaft is driven to rotate unidirectionally, converting linear motion into rotational motion. Through the second speed increasing transmission component, the driven shaft is driven to rotate, and the transmission speed can be increased while transmitting power, achieving a speed increasing effect, reducing the power of the driving component, achieving energy conservation and environmental protection effects, and reducing the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 is a top view cross-sectional view of the present invention;

[0042] Figure 2 is a front view cross-sectional view of the driving shaft of the present invention;

[0043] Figure 3 is Figure 2 an enlarged schematic view of part A of

[0044] Figure 4 is a structural schematic view of the one-way transmission component of the present invention.

[0045] The description of the reference numerals is as follows:

[0046] 1. Housing; 2. Driving shaft; 31. First gear; 32. Rack; 33. Bearing plate; 34. Concave hole; 35. Steel ball; 4. One-way transmission assembly; 41. Transmission disc; 42. Accommodation cavity; 43. Spring; 44. Driving block; 45. Positioning hole; 46. First inclined surface; 5. Intermediate shaft; 61. Second gear; 62. Third gear; 63. Transmission hole; 64. Second inclined surface; 71. Fourth gear; 72. Fifth gear; 8. Driven shaft; 9. Fixed frame; 91. Guide groove. Detailed implementation mode

[0047] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0048] See Figures 1-4 As shown, the present invention provides a speed increasing mechanism, including: a driving shaft 2, an intermediate shaft 5 and a driven shaft 8 rotatably installed inside the housing 1;

[0049] A first gear 31 fixedly arranged outside the driving shaft 2;

[0050] A rack 32 slidably arranged on the inner top surface of the housing 1, and the rack 32 meshes with the first gear 31;

[0051] A driving assembly for driving the rack 32 to reciprocate;

[0052] A first speed increasing transmission assembly connected between the driving shaft 2 and the intermediate shaft 5. When the driving shaft 2 rotates forward, the first speed increasing transmission assembly drives the intermediate shaft 5 to rotate forward. When the driving shaft 2 rotates reversely, the first speed increasing transmission assembly disengages and does not drive the intermediate shaft 5 to rotate;

[0053] A second speed increasing transmission assembly connected between the intermediate shaft 5 and the driven shaft 8 to drive the driven shaft 8 to rotate synchronously with the intermediate shaft 5.

[0054] In this embodiment, during operation, the driving assembly drives the rack 32 to reciprocate. Through the meshing transmission between the rack 32 and the first gear 31, the driving shaft 2 is driven to rotate forward and reverse reciprocally. When the driving shaft 2 rotates forward, the first speed increasing transmission assembly drives the intermediate shaft 5 to rotate forward, and through the second speed increasing transmission assembly, the driven shaft 8 is driven to rotate forward. When the driving shaft 2 rotates reversely, the first speed increasing transmission assembly disengages and does not drive the intermediate shaft 5 to rotate. During the process of driving the driving shaft 2 to rotate forward and reverse reciprocally, the driven shaft 8 is ultimately driven to rotate continuously forward. Through the reciprocating drive of the rack 32, the driving shaft 2 is driven to rotate forward and reverse reciprocally. The first speed increasing transmission assembly drives the intermediate shaft 5 to rotate unidirectionally, converting linear motion into rotational motion. The second speed increasing transmission assembly drives the driven shaft 8 to rotate, and while transmitting power, it can increase the transmission speed to achieve a speed increasing effect. When the load power remains unchanged, the structure of the present application can reduce the power of the driving assembly, achieving the effects of energy conservation and environmental protection and reducing equipment costs.

[0055] In an alternative embodiment of the present invention, two sets of driving assemblies are provided, and the two sets of driving assemblies are respectively connected to both ends of the rack 32 in the length direction.

[0056] In this embodiment, by setting two sets of driving assemblies to simultaneously drive the rack 32 to reciprocate, the stable movement of the rack 32 can be ensured, and at the same time, it helps to improve the transmission stability and transmission effect of the rack 32 on the first gear 31.

[0057] In an alternative embodiment of the present invention, the driving assembly includes:

[0058] A hydraulic cylinder, the output end of the hydraulic cylinder is connected to the rack 32;

[0059] A hydraulic pump, the hydraulic pump and the hydraulic cylinder form an oil supply circuit through an oil pipe;

[0060] A driving motor, the output end of the driving motor is connected to the hydraulic pump.

[0061] In this embodiment, the driving motor drives the hydraulic pump to work to supply hydraulic oil to the hydraulic cylinder, so that the hydraulic cylinder drives the rack 32 to reciprocate. Through the meshing transmission between the rack 32 and the first gear 31, linear motion is converted into circular rotation. The small-power driving motor drives the hydraulic pump to drive the hydraulic cylinder to work, thereby providing a large driving force, and cooperating with the first speed increasing transmission assembly and the second speed increasing transmission assembly for transmission speed increase.

[0062] Such as Figure 1 and Figure 2 shown, in an alternative embodiment of the present invention, the first speed increasing transmission assembly includes:

[0063] A second gear 61 rotatably connected to the driving shaft 2;

[0064] The third gear 62 connected to the overrun shaft 5, the third gear 62 meshes with the second gear 61, and the number of teeth of the third gear 62 is less than that of the second gear 61;

[0065] The drive disk 41 connected to the drive shaft 2;

[0066] A plurality of one-way drive components 4, the plurality of one-way drive components 4 are evenly distributed circumferentially on the side surface of the drive disk 41, and the plurality of one-way drive components 4 are in drive engagement with the second gear 61. When the drive shaft 2 rotates forward, the plurality of one-way drive components 4 are in drive engagement with the second gear 61 to drive the second gear 61 to rotate forward with the drive shaft 2. When the drive shaft 2 rotates reversely, the plurality of one-way drive components 4 are disengaged from the second gear 61.

[0067] In this embodiment, when the drive shaft 2 rotates forward, the plurality of one-way drive components 4 are in drive engagement with the second gear 61 to drive the second gear 61 to rotate forward with the drive shaft 2. When the drive shaft 2 rotates reversely, the plurality of one-way drive components 4 are disengaged from the second gear 61, thereby continuously driving the overrun shaft 5 to rotate and converting the reciprocating movement of the rack 32 into the continuous rotation of the overrun shaft 5;

[0068] The number of teeth of the third gear 62 is less than that of the second gear 61, which can increase the rotation speed of the overrun shaft 5 during transmission and achieve a speed increasing effect.

[0069] As Figure 1 and Figure 2 shown, in an alternative embodiment of the present invention, there are two drive disks 41, and the two drive disks 41 are respectively located on both sides of the second gear 61.

[0070] In this embodiment, by providing two drive disks 41, the driving stability of the drive disks 41 to the second gear 61 can be ensured, and the driving effect can be ensured.

[0071] As Figure 2 and Figure 4 shown, in an alternative embodiment of the present invention, the plurality of one-way drive components 4 include:

[0072] A plurality of receiving cavities 42, the plurality of receiving cavities 42 are evenly distributed circumferentially on the side surface of the drive disk 41;

[0073] Springs 43 arranged inside the plurality of receiving cavities 42;

[0074] Drive blocks 44 slidably arranged inside the plurality of receiving cavities 42, the cross-section of the drive blocks 44 is a square structure, and the drive blocks 44 are slidably matched with the receiving cavities 42. The outer ends of the drive blocks 44 are inserted and matched with the transmission holes 63 on the side surface of the second gear 61. The outer ends of the drive blocks 44 are provided with first inclined surfaces 46, and the first inclined surfaces 46 are adapted to the second inclined surfaces 64 inside the transmission holes 63.

[0075] In this embodiment, when the driving shaft 2 rotates forward, under the action of the spring 43, the driving block 44 is inserted into the transmission hole 63, and the transmission is carried out through the driving block 44 and the transmission hole 63, so that the transmission disk 41 drives the second gear 61 to rotate forward; when the driving shaft 2 rotates reversely, through the cooperation of the first inclined surface 46 and the second inclined surface 64, an axial thrust is provided to the driving shaft, so that the spring 43 contracts, the driving block 44 is separated from the transmission hole 63, and the transmission disk 41 does not drive the second gear 61 to rotate reversely, realizing one-way transmission. Thus, the reciprocating forward and reverse rotations of the driving shaft 2 are converted into the continuous forward rotation of the second gear 61, and the driving shaft 5 is driven to continuously rotate forward by the meshing transmission of the second gear 61 and the third gear 62.

[0076] As Figure 4 shown, in an alternative embodiment of the present invention, a positioning hole 45 is provided at the inner end of the driving block 44, and the spring 43 extends into the positioning hole 45.

[0077] In this embodiment, by making the spring 43 extend into the positioning hole 45, the thrust of the spring 43 on the driving block 44 is ensured, and it is ensured that the driving block 44 can be accurately inserted into the transmission hole 63.

[0078] As Figure 3 shown, in an alternative embodiment of the present invention, it further includes:

[0079] A fixed frame 9, and the fixed frame 9 is connected to the inner top surface of the housing 1;

[0080] The upper surface of the rack 32 penetrates through the guiding groove 91 at the bottom surface of the fixed frame 9 and extends into the fixed frame 9;

[0081] A bearing plate 33 formed on the upper surface of the rack 32;

[0082] A plurality of recessed holes 34, the plurality of recessed holes 34 are uniformly distributed along the length direction of the rack 32 on the bottom surface of the bearing plate 33, there are two groups of the plurality of recessed holes 34, and the two groups of the plurality of recessed holes 34 are symmetrically distributed on both sides of the rack 32;

[0083] Steel balls 35 embedded in the plurality of recessed holes 34, and the steel balls 35 are in contact with the inner bottom surface of the fixed frame 9.

[0084] In this embodiment, the rack 32 is limited and guided through the guiding groove 91, and the reciprocating sliding of the rack 32 inside the guiding groove 91 is realized by the rolling of the steel balls 35 and the fixed frame 9, reducing the sliding friction of the rack 32 and ensuring the accurate reciprocating movement of the rack 32.

[0085] As Figure 2 shown, in an alternative embodiment of the present invention, there are two first gears 31, and the two first gears 31 are respectively close to both ends of the driving shaft 2;

[0086] There are two fixed frames 9 and racks 32, and the two racks 32 are respectively meshed with the two first gears 31.

[0087] In this embodiment, by providing two sets of racks 32 and first gears 31, it can ensure that the rack 32 accurately and stably drives the driving shaft 2 to rotate forward and backward reciprocally, ensuring the transmission effect.

[0088] As Figure 1 shown, in an alternative embodiment of the present invention, the second speed increasing transmission assembly includes:

[0089] A fourth gear 71 connected to the intermediate shaft 5;

[0090] A fifth gear 72 connected to the driven shaft 8, the fifth gear 72 is meshed with the fourth gear 71, and the number of teeth of the fourth gear 71 is greater than the number of teeth of the fifth gear 72.

[0091] In this embodiment, through the meshing transmission of the fourth gear 71 and the fifth gear 72, the intermediate shaft 5 drives the driven shaft 8 to rotate forward continuously; the number of teeth of the fourth gear 71 is greater than the number of teeth of the fifth gear 72, which can increase the rotational speed of the driven shaft 8 and achieve a speed increasing effect.

[0092] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A speed increasing mechanism, characterized in that: include: A driving shaft (2), a transition shaft (5) and a driven shaft (8) are rotatably mounted inside the housing (1); A first gear (31), the first gear (31) being fixedly arranged on the outside of the driving shaft (2); A rack (32), the rack (32) being slidably disposed on the top surface of the housing (1), the rack (32) being meshed with the first gear (31); A driving assembly for driving the rack (32) to reciprocate; a first speed-increasing transmission component, the first speed-increasing transmission component being connected between the driving shaft (2) and the transition shaft (5); when the driving shaft (2) rotates forward, the first speed-increasing transmission component drives the transition shaft (5) to rotate forward; and when the driving shaft (2) rotates reversely, the first speed-increasing transmission component is engaged and disengaged and does not drive the transition shaft (5) to rotate; A second speed-increasing transmission assembly is connected between the transition shaft (5) and the driven shaft (8) to drive the driven shaft (8) to rotate synchronously with the transition shaft (5).

2. A speed increasing mechanism according to claim 1, characterized in that: The drive components are provided in two groups, and the two groups of drive components are respectively connected to the two ends of the rack (32) in the length direction.

3. A speed increasing mechanism according to claim 2, characterized in that: The drive assembly comprises: A hydraulic cylinder, wherein an output end of the hydraulic cylinder is connected to the rack (32); A hydraulic pump, wherein the hydraulic pump and the hydraulic cylinder form an oil supply circuit through an oil pipe; A driving motor, wherein an output end of the driving motor is connected to the hydraulic pump.

4. The speed increasing mechanism according to claim 1, characterized in that: The first speed increasing transmission assembly comprises: a second gear (61) rotatably connected to the driving shaft (2); a third gear (62) connected to the transition shaft (5), the third gear (62) meshing with the second gear (61), the number of teeth of the third gear (62) being smaller than the number of teeth of the second gear (61); A transmission plate (41) connected to the driving shaft (2); A plurality of one-way transmission components (4) are evenly distributed on the circumference of the side surface of the transmission disk (41), and the plurality of one-way transmission components (4) are in transmission meshing engagement with the second gear (61); when the driving shaft (2) rotates forward, the plurality of one-way transmission components (4) are in transmission meshing engagement with the second gear (61), driving the second gear (61) to rotate forward with the driving shaft (2); when the driving shaft (2) rotates reversely, the plurality of one-way transmission components (4) are disengaged from the second gear (61).

5. A speed increasing mechanism according to claim 4, characterized in that: Two transmission discs (41) are provided, and the two transmission discs (41) are respectively located on both sides of the second gear (61).

6. The speed increasing mechanism according to claim 4, characterized in that: The plurality of one-way transmission components (4) include: A plurality of accommodating cavities (42), wherein the plurality of accommodating cavities (42) are evenly distributed on the circumference of the side surface of the transmission plate (41); A spring (43) disposed inside the plurality of accommodating cavities (42); A driving block (44) is slidably arranged inside the plurality of accommodating cavities (42); the cross section of the driving block (44) is a square structure, and the driving block (44) is slidably matched with the accommodating cavity (42); the outer end of the driving block (44) is plug-fitted with a transmission hole (63) on the side of the second gear (61); the outer end of the driving block (44) is provided with a first inclined surface (46), and the first inclined surface (46) is adapted to a second inclined surface (64) inside the transmission hole (63).

7. A speed increasing mechanism according to claim 6, characterized in that: The inner end of the driving block (44) is provided with a positioning hole (45), and the spring (43) extends into the interior of the positioning hole (45).

8. The speed increasing mechanism according to claim 1, characterized in that: Also includes: A fixing frame (9), the fixing frame (9) being connected to the inner top surface of the shell (1); The upper surface of the rack (32) passes through the guide groove (91) on the bottom surface of the fixed frame (9) and extends into the interior of the fixed frame (9); a bearing plate (33) formed on the upper surface of the rack (32); A plurality of recessed holes (34), the plurality of recessed holes (34) being evenly distributed on the bottom surface of the bearing plate (33) along the length direction of the rack (32), the plurality of recessed holes (34) being provided in two groups, and the two groups of the plurality of recessed holes (34) being symmetrically distributed on both sides of the rack (32); Steel balls (35) are embedded in the plurality of recessed holes (34), and the steel balls (35) abut against the inner bottom surface of the fixing frame (9).

9. The speed increasing mechanism according to claim 7, characterized in that: Two first gears (31) are provided, and the two first gears (31) are respectively close to two ends of the driving shaft (2); The fixing frame (9) and the rack (32) are provided in two numbers, and the two racks (32) are respectively meshed with the two first gears (31).

10. The speed increasing mechanism according to claim 1, characterized in that: The second speed increasing transmission assembly comprises: a fourth gear (71) connected to the transition shaft (5); A fifth gear (72) connected to the driven shaft (8), the fifth gear (72) meshing with the fourth gear (71), the number of teeth of the fourth gear (71) being greater than the number of teeth of the fifth gear (72).

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