Speed increasing mechanism

Abstract

The utility model discloses a speed increasing mechanism which comprises a driving shaft, a transition shaft and a driven shaft. The driving shaft, the transition shaft and the driven shaft are rotationally installed in a shell. 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 utility model relates to drive mechanism technical field, concretely relates to a speed increasing mechanism. BACKGROUND

[0002] When driving high-power moving body such as generator plunger pump, need to use corresponding high-power drive motor to drive to work normally, for example: 6 megawatt plunger pump is driven to work with 270 kilowatt motor, the cost of driving equipment is increased, and energy consumption is high, cannot satisfy the development concept of energy saving and environmental protection. UTILITY MODEL CONTENT

[0003] The utility model discloses a speed increasing mechanism, which is used to solve the above problems, and details are described below.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] The utility model provides a kind of speed increasing mechanism, comprising:

[0006] Driving shaft, overdrive shaft and driven shaft are rotatably installed in the shell interior;

[0007] First gear, the first gear is fixedly arranged on the outside of the driving shaft;

[0008] Rack, the rack is slidably arranged in the top surface of the shell, and the rack is engaged with the first gear;

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

[0010] First speed increasing transmission assembly, the first speed increasing transmission assembly is connected between the driving shaft and the overdrive shaft, when the driving shaft rotates forward, the first speed increasing transmission assembly drives the overdrive shaft to rotate forward, when the driving shaft reverses, the first speed increasing transmission assembly engages and disengages not to drive overdrive shaft to rotate;

[0011] Second speed increasing transmission assembly, the second speed increasing transmission assembly is connected between the overdrive shaft and the driven shaft to drive the driven shaft and the overdrive shaft to rotate synchronously.

[0012] Optionally, the drive assembly is provided with two groups, and two groups of drive assemblies are connected with the two ends of the rack length direction respectively.

[0013] Optionally, the drive assembly comprises:

[0014] Hydraulic cylinder, the output end of the hydraulic cylinder is connected with the rack;

[0015] Hydraulic pump, the hydraulic pump and the hydraulic cylinder form oil supply circuit through oil pipe;

[0016] a driving motor, an output end of the driving motor being connected with the hydraulic pump.

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

[0018] a second gear wheel being rotatably connected with the driving shaft;

[0019] a third gear wheel being connected with the driven shaft, the third gear wheel being engaged with the second gear wheel, and the third gear wheel having a smaller number of teeth than the second gear wheel;

[0020] a transmission disc being connected with the driving shaft;

[0021] a 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 engaged with the second gear wheel, when the driving shaft rotates in a forward direction, the plurality of one-way transmission assemblies are engaged with the second gear wheel to drive the second gear wheel to rotate in the forward direction with the driving shaft, and when the driving shaft rotates in a reverse direction, the plurality of one-way transmission assemblies are disengaged from the second gear wheel.

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

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

[0024] a plurality of accommodating cavities being circumferentially and uniformly distributed on the side surface of the transmission disc;

[0025] a spring being arranged inside the plurality of accommodating cavities;

[0026] a driving block being slidably arranged inside the plurality of accommodating cavities, the driving block having a square structure in cross section, the driving block being slidably fitted with the accommodating cavities, an outer end of the driving block being insertedly fitted with a transmission hole on the side surface of the second gear wheel, the outer end of the driving block being provided with a first inclined surface, and the first inclined surface being adapted to a second inclined surface inside the transmission hole.

[0027] Optionally, an inner end of the driving block is provided with a positioning hole, and the spring extends into the positioning hole.

[0028] Optionally, the hydraulic pump further comprises:

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

[0030] a guide groove being formed in the bottom surface of the fixed frame and extending into the fixed frame;

[0031] a bearing plate being formed on the upper surface of the rack gear;

[0032] A plurality of recessed holes are uniformly distributed on the bottom surface of the bearing plate along the length direction of the rack, and the plurality of recessed holes are provided with two groups, and the two groups of the plurality of recessed holes are symmetrically distributed on the two sides of the rack.

[0033] Steel balls embedded in the plurality of recessed holes abut against the inner bottom surface of the fixed frame.

[0034] Optionally, the first gear is provided with two, and the two first gears are respectively close to the two ends of the driving shaft.

[0035] The fixed frame and the rack are provided with two, and the two racks are respectively engaged with the two first gears.

[0036] Optionally, the second speed increasing transmission assembly comprises:

[0037] A fourth gear connected with the over shaft;

[0038] A fifth gear connected with 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] Beneficial effects are that: through the reciprocating drive of the rack, the reciprocating rotation of the driving shaft is realized, the linear motion is changed into the rotary motion through the one-way drive rotation of the first speed increasing transmission assembly to the over shaft, the rotation of the driven shaft is driven through the second speed increasing transmission assembly, the transmission speed is improved at the same time, the speed increasing effect is realized, the power of the driving assembly is reduced, the energy saving and environmental protection effect is achieved, and the equipment cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0041] Figure 1 is a top view of the present application;

[0042] Figure 2 is a front view of the driving shaft of the present application;

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

[0044] Figure 4 is a structure schematic view of the one-way transmission assembly of the present application.

[0045] The reference signs are explained 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, accommodating cavity; 43, spring; 44, driving block; 45, positioning hole; 46, first inclined surface; 5, overrunning 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 DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the utility model.

[0048] Referring to Figures 1-4 The utility model provides a speed increasing mechanism, which comprises: a driving shaft 2, an overrunning shaft 5 and a driven shaft 8 rotatably installed inside a housing 1.

[0049] A first gear 31 is fixedly arranged on the outer side of the driving shaft 2.

[0050] A rack 32 is slidably arranged on the top surface of the housing 1, and the rack 32 is engaged with the first gear 31.

[0051] A driving assembly is used to drive the rack 32 to move back and forth.

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

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

[0054] In the embodiment, during operation, the rack 32 is driven to reciprocate by the driving assembly, the driving main shaft 2 is driven to reciprocate and reverse by the meshing transmission of the rack 32 and the first gear 31, when the driving main shaft 2 rotates forward, the first speed-increasing transmission assembly drives the overdrive shaft 5 to rotate forward, and the driven shaft 8 is driven to rotate forward by the second speed-increasing transmission assembly; when the driving main shaft 2 reverses, the first speed-increasing transmission assembly is disengaged and does not drive the overdrive shaft 5 to rotate; during the reciprocation and reversal of the driving main shaft 2, the driven shaft 8 is continuously driven to rotate forward; the reciprocation and reversal of the driving main shaft 2 are realized by the reciprocating drive of the rack 32, the linear motion is converted into rotary motion by the one-way drive of the overdrive shaft 5 by the first speed-increasing transmission assembly, and the driven shaft 8 is driven to rotate by the second speed-increasing transmission assembly; the transmission speed can be improved during transmission, and the speed-increasing effect is realized; under the condition that the load power is unchanged, the power of the driving assembly can be reduced by using the structure of the application, the energy-saving and environment-friendly effect is achieved, and the equipment cost is reduced.

[0055] In the optional embodiment of the utility model, the driving assembly is provided with two groups, and the two groups of driving assemblies are connected with the two ends of the length direction of the rack 32 respectively.

[0056] In the embodiment, the two groups of driving assemblies are arranged to drive the rack 32 to reciprocate simultaneously, so that the stable movement of the rack 32 is ensured, and the transmission stability and transmission effect of the rack 32 on the first gear 31 are improved.

[0057] In the optional embodiment of the utility model, the driving assembly comprises:

[0058] The output end of the hydraulic cylinder is connected with the rack 32;

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

[0060] The output end of the driving motor is connected with the hydraulic pump.

[0061] In the embodiment, the driving motor drives the hydraulic pump to work to provide hydraulic oil to the hydraulic cylinder, so that the rack 32 is driven to reciprocate by the hydraulic cylinder, the linear motion is converted into rotary motion by the meshing transmission of the rack 32 and the first gear 31, the hydraulic pump is driven to work by the small-power driving motor to drive the hydraulic cylinder, so that large driving force is provided, and the first speed-increasing transmission assembly and the second speed-increasing transmission assembly are matched to drive and speed up.

[0062] As shown in Figure 1 and Figure 2 In the optional embodiment of the utility model, the first speed-increasing transmission assembly comprises:

[0063] The second gear 61 is rotationally connected with the driving main shaft 2;

[0064] A third gear 62 connected with the excessive shaft 5, the third gear 62 is engaged 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] A transmission disc 41 connected with the driving shaft 2;

[0066] A plurality of one-way transmission assemblies 4, the plurality of one-way transmission assemblies 4 are uniformly distributed on the side of the transmission disc 41, and the plurality of one-way transmission assemblies 4 are in transmission engagement with the second gear 61, when the driving shaft 2 rotates forward, the plurality of one-way transmission assemblies 4 are in transmission engagement with the second gear 61, driving the second gear 61 to rotate forward with the driving shaft 2, and when the driving shaft 2 reverses, the plurality of one-way transmission assemblies 4 are disengaged from the second gear 61.

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

[0068] The number of teeth of the third gear 62 is less than that of the second gear 61, so that the rotation speed of the excessive shaft 5 can be improved during transmission, thereby achieving the effect of increasing speed.

[0069] As shown in Figure 1 and Figure 2 In an optional embodiment of the utility model, the transmission disc 41 is provided with two, and the two transmission discs 41 are located at the two sides of the second gear 61.

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

[0071] As shown in Figure 2 and Figure 4 In an optional embodiment of the utility model, the plurality of one-way transmission assemblies 4 comprises:

[0072] A plurality of accommodating cavities 42, the plurality of accommodating cavities 42 are uniformly distributed on the side of the transmission disc 41;

[0073] A spring 43 arranged in the plurality of accommodating cavities 42;

[0074] A driving block 44 slidingly arranged in the plurality of accommodating cavities 42, the cross section of the driving block 44 is a square structure, the driving block 44 is in sliding fit with the accommodating cavity 42, the outer end of the driving block 44 is in plug fit with the transmission hole 63 on the side of the second gear 61, and the outer end of the driving block 44 is provided with a first inclined surface 46, and the first inclined surface 46 is matched with a second inclined surface 64 in the transmission hole 63.

[0075] In the embodiment, when the driving shaft 2 rotates forward, the driving block 44 is inserted into the transmission hole 63 under the action of the spring 43, the transmission disc 41 drives the second gear 61 to rotate forward through the transmission of the driving block 44 and the transmission hole 63; when the driving shaft 2 rotates reversely, the spring 43 is retracted through the cooperation of the first inclined surface 46 and the second inclined surface 64, the driving block 44 is separated from the transmission hole 63, and the transmission disc 41 cannot drive the second gear 61 to rotate reversely, so that the one-way transmission is realized, and the reciprocating rotation and the reverse rotation of the driving shaft 2 are converted into the continuous forward rotation of the second gear 61, and the second gear 61 and the third gear 62 are engaged to drive the driven shaft 5 to continuously rotate forward.

[0076] As shown in the optional embodiment of the utility model, the inner end of the driving block 44 is provided with a positioning hole 45, and the spring 43 extends into the positioning hole 45. Figure 4

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

[0078] As shown in the optional embodiment of the utility model, the utility model still comprises: Figure 3

[0079] The fixed frame 9 is connected to the inner top surface of the shell 1.

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

[0081] The bearing plate 33 is formed on the rack 32 upper surface.

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

[0083] The steel ball 35 is embedded in the plurality of recessed holes 34, and the steel ball 35 abuts against the inner bottom surface of the fixed frame 9.

[0084] In the embodiment, the rack 32 is limited and guided by the guiding groove 91, the reciprocating sliding of the rack 32 in the guiding groove 91 is realized by the rolling of the steel ball 35 and the fixed frame 9, the sliding friction of the rack 32 is reduced, and the accurate reciprocating movement of the rack 32 is ensured.

[0085] As shown in the optional embodiment of the utility model, the first gear 31 is provided with two, and the two first gears 31 are respectively close to the two ends of the driving shaft 2. Figure 2

[0086] ​​​The fixed frame 9 and the rack 32 are provided with two, and the two racks 32 are respectively engaged with the two first gears 31.

[0087] In the embodiment, the two sets of racks 32 and first gears 31 are arranged to ensure that the rack 32 accurately and stably drives the main shaft 2 to reciprocate and rotate in the positive direction and the reverse direction, and ensure the transmission effect.

[0088] As shown in the optional embodiment of the utility model, the second speed increasing transmission assembly comprises: Figure 1 As shown in the optional embodiment of the utility model, the second speed increasing transmission assembly comprises:

[0089] The fourth gear 71 connected with the over shaft 5;

[0090] The fifth gear 72 connected with the driven shaft 8, the fifth gear 72 is engaged with the fourth gear 71, and the number of teeth of the fourth gear 71 is greater than that of the fifth gear 72.

[0091] In the embodiment, the fourth gear 71 and the fifth gear 72 are engaged to drive the over shaft 5 to continuously rotate in the positive direction; the number of teeth of the fourth gear 71 is greater than that of the fifth gear 72, so that the rotating speed of the driven shaft 8 can be improved, and the speed increasing effect is achieved.

[0092] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A speed increasing mechanism, characterized by, The utility model relates to a kind of transmission mechanism, including: Rotary installation in the shell (1) inside driven shaft (2), excessive axle (5) and driven shaft (8); First gear (31), the first gear (31) is fixedly arranged in the driven shaft (2) outside; Rack (32), the rack (32) is slidably arranged in the top surface of the shell (1), and the rack (32) is engaged with the first gear (31); Drive assembly to drive the rack (32) reciprocating movement; First speed-increasing transmission assembly, the first speed-increasing transmission assembly is connected between the driven shaft (2) and the excessive axle (5), when the driven shaft (2) rotates forward, the first speed-increasing transmission assembly drives the excessive axle (5) to rotate forward, when the driven shaft (2) reverses, the first speed-increasing transmission assembly engages and disengages not to drive excessive axle (5) to rotate; Second speed-increasing transmission assembly, the second speed-increasing transmission assembly is connected between the excessive axle (5) and the driven shaft (8), to drive the driven shaft (8) and the excessive axle (5) synchronous rotation.

2. The speed increasing mechanism of claim 1, wherein The drive assembly is provided with two groups, and two groups of drive assemblies are respectively connected with the two ends of the length direction of the rack (32).

3. The speed increasing mechanism of claim 2, wherein The drive assembly includes: Hydraulic cylinder, the output end of the hydraulic cylinder is connected with the rack (32); Hydraulic pump, the hydraulic pump and the hydraulic cylinder form oil supply circuit through oil pipe; Drive motor, the output end of the drive motor is connected with the hydraulic pump.

4. The speed increasing mechanism of claim 1, wherein The first speed-increasing transmission assembly includes: Second gear (61) rotatably connected with the driven shaft (2); Third gear (62) connected with the excessive axle (5), the third gear (62) is engaged with the second gear (61), and the number of teeth of the third gear (62) is less than the number of teeth of the second gear (61); Transmission disc (41) connected with the driven shaft (2); A plurality of one-way transmission assemblies (4) are circumferentially uniformly distributed on the side surface of the transmission disc (41), and the plurality of one-way transmission assemblies (4) are in transmission engagement with the second gear (61), when the driven shaft (2) rotates forward, the plurality of one-way transmission assemblies (4) are in transmission engagement with the second gear (61), to drive the second gear (61) to rotate forward with the driven shaft (2), when the driven shaft (2) reverses, the plurality of one-way transmission assemblies (4) are disengaged from the second gear (61).

5. The speed increasing mechanism of claim 4, wherein The transmission disc (41) is provided with two, and two transmission discs (41) are respectively located on the two sides of the second gear (61).

6. The speed increasing mechanism of claim 4, wherein The plurality of one-way transmission assemblies (4) include: A plurality of accommodating cavities (42) are circumferentially uniformly distributed on the side surface of the transmission disc (41); Spring (43) arranged in the plurality of accommodating cavities (42). The driving block (44) is slidably arranged in the plurality of accommodating cavities (42), the cross section of the driving block (44) is a square structure, the driving block (44) is in sliding fit with the accommodating cavity (42), the outer end of the driving block (44) is in plug fit with the transmission hole (63) on the side surface 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 matched with a second inclined surface (64) in the transmission hole (63).

7. The speed increasing mechanism of claim 6, wherein The inner end of the driving block (44) is provided with a positioning hole (45), and the spring (43) extends into the positioning hole (45).

8. The speed increasing mechanism of claim 1, wherein Further comprising: The fixed frame (9) is connected to the inner top surface of the shell (1); The upper surface of the rack (32) penetrates the guide groove (91) in the bottom surface of the fixed frame (9) and extends into the fixed frame (9); The bearing plate (33) is formed on the upper surface of the rack (32); A plurality of recessed holes (34) are uniformly distributed on the bottom surface of the bearing plate (33) along the length direction of the rack (32), the plurality of recessed holes (34) are provided in two groups, and the two groups of recessed holes (34) are symmetrically distributed on the two sides of the rack (32); The steel ball (35) is embedded in the plurality of recessed holes (34), and the steel ball (35) abuts against the inner bottom surface of the fixed frame (9).

9. The speed increasing mechanism of claim 8, wherein The first gear (31) is provided with two, and the two first gears (31) are respectively close to the two ends of the driving shaft (2); The fixed frame (9) and the rack (32) are provided with two, and the two racks (32) are respectively engaged with the two first gears (31).

10. The speed increasing mechanism of claim 1, wherein The second speed increasing transmission assembly comprises: The fourth gear (71) connected with the over shaft (5); The fifth gear (72) connected with the driven shaft (8), the fifth gear (72) is engaged with the fourth gear (71), and the number of teeth of the fourth gear (71) is greater than that of the fifth gear (72).

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