Manual gear shifting double-speed-ratio speed reducer

Abstract

The utility model discloses a manual gear-shifting double-speed-ratio speed reducer, which belongs to the technical field of double-speed-ratio speed reducers and comprises a box body, a rotating arm rod is rotatably mounted at the top of the box body in a penetrating manner, a rotating disc is sleeved on the outer side of the rotating arm rod, and positioning grooves are respectively formed in the outer side of the rotating disc. And movable blocks are symmetrically installed on the top of the box body and located on one side of the rotating arm rod, a fixing plate is fixed between the movable blocks, T-shaped rods are installed in the middle of the fixing plate in a penetrating mode, the T-shaped rods are slidably connected with the fixing plate, and inserting blocks matched with the positioning grooves in size are fixed to one ends of the T-shaped rods. According to the manual gear-shifting double-speed-ratio speed reducer, the inserting block can be popped out through the elastic force effect of the spring when the rotating arm rod is rotated to a proper angle to complete rapid positioning of the angle of the rotating arm rod, operation can be achieved with one hand, fixing through tools is not needed, limiting is firmer, the manual gear-shifting double-speed-ratio speed reducer can be suitable for different devices, and therefore the practicability of the manual gear-shifting double-speed-ratio speed reducer is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double speed ratio speed reducer especially a manual gear shifting double speed ratio speed reducer belongs to double speed ratio speed reducer technical field. BACKGROUND

[0002] The manual gear shifting double speed ratio speed reducer is a speed reduction equipment that can change the transmission speed ratio through manual operation, is widely used in the fields of industry, agriculture, transportation and the like needing different rotational speed and torque output, relies on manual operation of the gear shifting mechanism to change the meshing state of the gear inside the speed reducer, thereby realizing the switching of two different speed ratios. When different output rotational speed and torque are needed, the operator manually dials the gear shifting lever, the gear shifting lever drives the shift fork and other components to move, the shift fork pushes the gear to slide on the shaft, the gears of different tooth combinations mesh with each other, and the transmission ratio between the input shaft and the output shaft is changed, achieving the purpose of speed reduction or speed increase.

[0003] The prior art such as the utility model with the application number 202422547088.0 discloses a manual gear shifting double speed ratio speed reducer, which has the advantages of manual gear shifting, double speed ratio adjustment, large torque output, low noise, smooth operation and the like. Moreover, an oil bath lubrication mode is adopted inside, without the need for additional design of a complex lubricating oil circuit connection, simplifying the installation and maintenance process. The present application is compact in design and high in integration, not only light in weight, but also simple in operation. The pure mechanical structure eliminates the dependence on electrical control, thereby reducing the cost and improving the stability and durability of the equipment. In the speed ratio design, the speed reducer exhibits high flexibility, can be customized according to the specific needs of customers, provides more rich speed ratio selection compared with the standard speed reducer, makes the application scenarios more extensive, and is also convenient for subsequent maintenance and repair work.

[0004] However, the above-mentioned application still has some deficiencies:

[0005] The manual gear shifting double speed ratio speed reducer adjusts different speed ratios by manually rotating the rotating arm lever by a certain angle to link the first gear and the rack, and then the positioning pin limits the rotation angle of the rotating arm lever. Although the positioning pin can play a positioning role, it needs to be aligned with the positioning hole when inserting the positioning pin, which is relatively cumbersome and laborious to operate. In addition, the positioning pin needs to be wedged with a tool when it is interference fit, which brings inconvenience to positioning and disassembly work, and when the positioning pin is clearance fit, it is relatively loose after being inserted into the positioning hole, which may cause loosening problems.

[0006] Therefore, a manual gear shifting double speed ratio speed reducer is designed to optimize the above-mentioned problems. UTILITY MODEL CONTENTS

[0007] The utility model discloses a main purpose is to provide a manual gear shift double speed ratio speed reducer to solve the problem of the above background technology.

[0008] The utility model discloses a purpose can reach by adopting following technical scheme:

[0009] A manual gear shift double speed ratio speed reducer, including the box, the top of box is installed with the rotation of the arm lever, the outside of the arm lever is equipped with the turntable, and the outside of the turntable is respectively set up with the positioning slot, and the top of box is installed with the movable block on the one side position symmetry of the arm lever, and the movable block is fixed with the fixed plate, and the middle position of fixed plate is installed with the T -shaped rod, and T -shaped rod and fixed plate slidingly connect, and the one end of T -shaped rod is fixed with the plug of the size matching of positioning slot, and the outside of T -shaped rod is equipped with the spring, and the bottom of the arm lever is fixed with the fixed gear, and the inside of box is provided with the fixed shaft and the rotation axis parallel to each other, and the rotation axis is slidably installed with the I -beam, and the both sides of I -beam are respectively installed with gear a and gear b, and the fixed shaft is respectively equipped with the installation of gear c and gear d, and the inside of box is slidably installed with the shift fork on the outside of I -beam, and the shift fork and box are provided with the guide assembly, and the top of shift fork is fixed with the rack plate, and the rack plate is engaged with fixed gear.

[0010] Preferably, the guide assembly comprises a guide rod and a protective ring, the guide rod is symmetrically installed in the inside of the box, the guide rod penetrates the shift fork and extends to the other side of the shift fork, the outside of the guide rod is provided with a buffer ring, and the protective ring is symmetrically installed on the shift fork.

[0011] Preferably, the shift fork comprises a clamping groove and a ball, the clamping groove is evenly arranged at the connection between the shift fork and the I-beam, and the ball is slidably installed in the inside of the clamping groove.

[0012] Preferably, the outside of one end of the T-shaped rod is provided with a protective layer, and the protective layer is provided with anti-skid lines.

[0013] Preferably, one side of the protective ring is provided as a circular arc surface, and the protective ring is a rubber block.

[0014] Preferably, one side of the buffer ring is provided with a semicircular sleeve ring, and the semicircular sleeve rings are provided with a clamp.

[0015] Preferably, one side of the movable block is fixedly provided with a connecting plate, and the connecting plate is installed on the top of the box through bolts.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] 1. The utility model discloses a box, rotating arm rod, carousel, positioning groove, movable block, fixed plate, T-shaped rod, insert block, spring, fixed gear, rack plate, pivot, I pipe, gear a, gear b, fixed shaft, gear c and gear d's cooperation and utilization can be in rotating rotating arm rod to the appropriate angle through the spring elastic force and insert block and complete the quick positioning of rotating arm rod angle, one hand can also operate, and need not use the tool fixed, and the location is more firm and can be applicable to different equipment on, thereby improved the practicality of the manual gear shifting double -speed ratio speed reducer.

[0018] 2. The utility model discloses a through the cooperation and utilization of shift fork, clamping slot and ball, gear b and gear a rotate simultaneously and will drive I pipe rotation, ball changes the direct hard friction between shift fork and I pipe for rolling friction, and then reduces the damage of the friction between shift fork and I pipe, improves the overall protection.

[0019] 3. The utility model discloses a through the cooperation and utilization of guide rod, buffer ring and protection ring, rotating rotating arm rod linkage shift fork moves along the guide rod horizontally, make the protection ring of shift fork one side move to and contact and fit with one side of buffer ring, and buffer ring and protection ring position limit the movement of shift fork, can also play a certain buffering protection function simultaneously. ACCURACY OF DRAWINGS

[0020] Figure 1 It is the front view of the utility model;

[0021] Figure 2 It is the Figure 1 Structure enlarged view of A place in the utility model;

[0022] Figure 3 It is the connection schematic drawing of movable block and fixed plate of the utility model;

[0023] Figure 4 It is the shift fork schematic drawing of the utility model.

[0024] In the drawing: 1, box;2, rotating arm rod;3, carousel;4, positioning groove;

[0025] 5, guide assembly;501, guide rod;502, buffer ring;503, protection ring;

[0026] 6, movable block;7, fixed plate;8, T-shaped rod;9, insert block;10, spring;11, fixed gear;12, rack plate;

[0027] 13, shift fork;1301, clamping slot;1302, ball;

[0028] 14, pivot;15, I pipe;16, gear a;17, gear b;18, fixed shaft;19, gear c;20, gear d. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0030] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] It should be noted that the embodiments in the present application and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0032] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0033] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the product of the present application is used, or the orientation or position relationship commonly understood by those skilled in the art, such terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0034] Embodiment 1

[0035] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the embodiment proposes a manual shift double-speed ratio speed reducer, comprising a box body 1, a rotating arm rod 2 is rotatably installed on the top of the box body 1, a rotating disc 3 is sleeved on the outer side of the rotating arm rod 2, positioning grooves 4 are respectively formed on the outer side of the rotating disc 3, movable blocks 6 are symmetrically installed on the top of the box body 1 and located at one side of the rotating arm rod 2, a fixed plate 7 is fixed between the movable blocks 6, a T-shaped rod 8 is rotatably installed in the middle of the fixed plate 7 and is in sliding connection with the fixed plate 7, an insertion block 9 matched with the positioning groove 4 is fixed on one end of the T-shaped rod 8, springs 10 are sleeved on the outer side of the T-shaped rod 8, a fixed gear 11 is fixed on the bottom end of the rotating arm rod 2, fixed shafts 18 and a rotating shaft 14 parallel to each other are arranged in the box body 1, an I-shaped tube 15 is rotatably installed on the rotating shaft 14, gear a 16 and gear b 17 are respectively installed on the two sides of the I-shaped tube 15, gear c 19 and gear d 20 are respectively sleeved on the fixed shafts 18, a shift fork 13 is rotatably installed on the inner side of the I-shaped tube 15 in the box body 1, a guide assembly 5 is arranged between the shift fork 13 and the box body 1, a rack plate 12 is fixed on the top of the shift fork 13 and is in meshing connection with the fixed gear 11.

[0036] Rotating the rotating arm rod 2 as a whole, the rotating arm rod 2 drives the rotating disc 3 to rotate, so that the positioning groove 4 on the rotating disc 3 rotates to be aligned with the insertion block 9, under the elastic force of the spring 10, the insertion block 9 is elastically inserted into the positioning groove 4, the angle of the rotating disc 3 is limited, at the same time, the rotating arm rod 2 drives the fixed gear 11 to rotate to a certain angle, the fixed gear 11 drives the rack plate 12 to move horizontally, the rack plate 12 drives the shift fork 13 to move horizontally to push the I-shaped tube 15 and the gear a 16 and the gear b 17 to move horizontally at the same time, when the gear a 16 is in meshing connection with the gear d 20, it is a first speed ratio, when the gear b 17 is in meshing connection with the gear c 19, it is a second speed ratio, the T-shaped rod 8 is pulled outward, the T-shaped rod 8 drives the insertion block 9 to be separated from the positioning groove 4, then the rotating arm rod 2 can be rotated to adjust the angle of the rotating disc 3 and the fixed gear 11.

[0037] Embodiment 2

[0038] The scheme in embodiment 1 is further introduced in combination with a specific working mode, and details are described below:

[0039] As shown in Figure 1 and Figure 4 As a preferred embodiment, on the basis of the above mode, further, the guide assembly 5 comprises guide rods 501 and protective rings 503, the guide rods 501 are symmetrically installed in the box body 1, the guide rods 501 pass through the shift fork 13 and extend to the other side of the shift fork 13, the buffer rings 502 are installed on the outer side of the guide rods 501, the protective rings 503 are symmetrically installed on the shift fork 13, and the inner sides of the protective rings 503 are in sliding connection with the outer sides of the guide rods 501.

[0040] The rotating rotating arm rod 2 linkage shift fork 13 moves horizontally along the guide rod 501, so that the protective ring 503 on one side of the shift fork 13 moves to one side of the buffer ring 502 and is in contact and fits with the buffer ring 502 and the buffer ring 503. The movement position of the shift fork 13 is limited and buffered.

[0041] As Figure 1 and Figure 4 shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, the shift fork 13 includes a clamping groove 1301 and a ball 1302, the clamping groove 1301 is uniformly provided at the connection between the shift fork 13 and the I-shaped tube 15, and the ball 1302 is slidingly installed in the clamping groove 1301.

[0042] The gear b17 and the gear a16 rotate at the same time to drive the I-shaped tube 15 to rotate, and the I-shaped tube 15 and the shift fork 13 will produce friction, the ball 1302 changes the direct hard friction between the shift fork 13 and the I-shaped tube 15 to rolling friction, thereby reducing the wear caused by the friction between the shift fork 13 and the I-shaped tube 15.

[0043] As Figure 2 and Figure 3 shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, the outer side of one end of the T-shaped rod 8 is provided with a protective layer, and the protective layer is provided with anti-skid lines.

[0044] The protective layer and the anti-skid lines increase the friction between the T-shaped rod 8 and the hands of the workers, facilitating the pulling operation of the T-shaped rod 8.

[0045] As Figure 1 and Figure 4 shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, one side of the protective ring 503 is provided with a circular arc surface, and the protective ring 503 is a rubber block.

[0046] The circular arc surface and the rubber material of the protective ring 503 improve the buffering effect of the protective ring 503.

[0047] As Figure 1 and Figure 4 shown, as a preferred embodiment, on the basis of the above-mentioned mode, further, one side of the buffer ring 502 is provided with a semicircular collar, and the semicircular collars are provided with a clamp.

[0048] The semicircular collars and the clamp facilitate the disassembly and position movement of the buffer ring 502.

[0049] As Figure 2 and Figure 3As shown, as a preferred embodiment, on the basis of the above mode, further, one side of the movable block 6 is fixed with a connecting plate, and the connecting plate is installed on the top of the box body 1 through a bolt.

[0050] Through the setting of the connecting plate and the bolt, not only the disassembly and maintenance of the movable block 6 are facilitated, but also the position of the movable block 6 can be adjusted according to the use requirement.

[0051] Embodiment 3

[0052] The schemes in the embodiments 1 and 2 will be further introduced in combination with specific working modes, and details are described as follows:

[0053] Rotating the whole rotating arm rod 2, the rotating arm rod 2 drives the rotating disc 3 to rotate, so that the positioning groove 4 on the rotating disc 3 rotates to be aligned with the insertion block 9, under the elastic force of the spring 10, the insertion block 9 is elastically inserted into the positioning groove 4, the angle of the rotating disc 3 is limited, at the same time, the rotating arm rod 2 drives the fixed gear 11 to rotate to a certain angle, the fixed gear 11 drives the rack plate 12 to move horizontally, the rack plate 12 drives the I-shaped tube 15, the gear a 16 and the gear b 17 to move horizontally by driving the fork 13 to move horizontally, so that the protective ring 503 on one side of the fork 13 moves to contact and abut with one side of the buffer ring 502, the buffer ring 502 and the protective ring 503 limit and buffer protect the moving position of the fork 13, when the gear a 16 is engaged with the gear d 20, it is a first speed ratio, when the gear b 17 is engaged with the gear c 19, it is a second speed ratio, the T-shaped rod 8 is pulled outward, the T-shaped rod 8 drives the insertion block 9 to be separated from the positioning groove 4, then the angle of the rotating arm rod 2 and the rotating disc 3 can be rotated again, the gear b 17 and the gear a 16 rotate at the same time, which drives the I-shaped tube 15 to rotate, the I-shaped tube 15 and the fork 13 generate friction, the ball 1302 changes the direct hard friction between the fork 13 and the I-shaped tube 15 into rolling friction, and then reduces the damage caused by the friction between the fork 13 and the I-shaped tube 15.

[0054] The above is only a further embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the technical field according to the technical scheme and the concept of the present application within the scope disclosed by the present application makes equivalent replacement or change, which belongs to the protection scope of the present application.

Claims

1. A manually shifted two-speed ratio reduction unit comprising a housing (1), characterized in that: The top of the box (1) is rotatably provided with a rotating arm rod (2), the outer side of the rotating arm rod (2) is provided with a rotating disc (3), the outer side of the rotating disc (3) is provided with a positioning groove (4), the top of the box (1) is symmetrically provided with a movable block (6) on one side of the rotating arm rod (2), the movable block (6) is fixedly provided with a fixed plate (7) between them, the middle position of the fixed plate (7) is rotatably provided with a T-shaped rod (8), and the T-shaped rod (8) is rotatably connected with the fixed plate (7), one end of the T-shaped rod (8) is rotatably provided with an insertion block (9) matched with the positioning groove (4), the outer side of the T-shaped rod (8) is rotatably provided with a spring (10), the bottom end of the rotating arm rod (2) is fixedly provided with a fixed gear (11), the inside of the box (1) is rotatably provided with a fixed shaft (18) and a rotating shaft (14), the rotating shaft (14) is rotatably provided with an I-shaped tube (15), the two sides of the I-shaped tube (15) are rotatably provided with a gear a (16) and a gear b (17), the fixed shaft (18) is rotatably provided with a gear c (19) and a gear d (20), the inside of the box (1) is rotatably provided with a shift fork (13) on the outer side of the I-shaped tube (15), the shift fork (13) and the box (1) are rotatably provided with a guide assembly (5), the top of the shift fork (13) is fixedly provided with a rack plate (12), and the rack plate (12) is rotatably provided with the fixed gear (11).

2. A manually shifted two-speed ratio reduction unit as set forth in claim 1, characterized in that: The guide assembly (5) comprises a guide rod (501) and a protective ring (503), the guide rod (501) is symmetrically rotatably provided in the inside of the box (1), the guide rod (501) rotatably extends through the shift fork (13) and extends to the other side of the shift fork (13), the outer side of the guide rod (501) is rotatably provided with a buffer ring (502), the protective ring (503) is symmetrically rotatably provided on the shift fork (13), and the inside of the protective ring (503) is rotatably connected with the outer side of the guide rod (501).

3. A manual shift two-speed ratio reduction unit as set forth in claim 1, characterized in that: The shift fork (13) comprises a clamping groove (1301) and a ball (1302), the clamping grooves (1301) are rotatably provided at the connection between the shift fork (13) and the I-shaped tube (15), and the balls (1302) are rotatably provided in the inside of the clamping grooves (1301).

4. A manual shift two-speed ratio reduction unit as set forth in claim 1, characterized in that: The outer side of one end of the T-shaped rod (8) is rotatably provided with a protective layer, and the protective layer is rotatably provided with anti-skid lines.

5. A manual shift two-speed ratio reduction unit as set forth in claim 2, characterized in that: One side of the protective ring (503) is rotatably provided as a circular arc surface, and the protective ring (503) is a rubber block.

6. A manual shift two-speed ratio reduction unit as set forth in claim 2, characterized in that: One side of the buffer ring (502) is rotatably provided with a semicircular sleeve ring, and the semicircular sleeve rings are rotatably provided with a clamp.

7. A manual shift two-speed ratio reduction unit as in claim 1, wherein: One side of the movable block (6) is rotatably provided with a link plate, and the link plates are rotatably installed on the top of the box (1) through bolts.

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