Cylindrical gear differential structure

Abstract

The utility model relates to the technical field of gear differential, and discloses a cylindrical gear differential structure which comprises an input wheel, a shell and screws, a left side planet wheel and a right side planet wheel are installed in the shell, planet wheel shafts are inserted into the inner sides of the left side planet wheel and the right side planet wheel, glands are fixedly installed on the two sides of the shell respectively, and the left side planet wheel and the right side planet wheel are connected through the glands. And a left side output wheel and a right side output wheel are mounted on the two sides of the exterior of the shell in a sleeving manner correspondingly. Compared with an existing differential structure adopting bevel gear meshing to achieve the differential function, the cylindrical gear tooth profile machining machine tool is high in universality, machining precision is easy to guarantee, the bevel gear tooth profile needs a special machine tool, machining precision guaranteeing difficulty is high, cylindrical gear parallel mounting hole machining difficulty is low, bevel gear right-angle mounting hole machining difficulty is high, and machining efficiency is high. During assembly, the cylindrical gear can be directly assembled, the requirement for operating skills is low, the bevel gear needs to be measured, the gear meshing clearance needs to be adjusted, operation is complex, and the requirement is high.

Description

Technical Field

[0001] The utility model relates to the technical field of gear differentials, in particular to a cylindrical gear differential structure. Background Art

[0002] Differential structures are often used in the wheeled walking machinery industry. They are mainly used to solve the problem that the wheels on both sides of the wheeled walking machinery have different speeds due to different travel distances and resistances during the steering process. If the wheels on both sides are rigidly connected, the driving resistance will increase (sliding friction) and wear will increase.

[0003] Existing differential structures typically use bevel gear transmission to achieve differential function, but this places high demands on gear processing equipment. During assembly, ensuring the assembly clearance is within the designed range requires measurement and adjustment, which is quite difficult. To address this issue, we propose a cylindrical gear differential structure. Utility Model Content

[0004] The purpose of the utility model is to provide a cylindrical gear differential structure to solve the problems existing in the above background technology, such as high requirements on tooth profile processing equipment and high difficulty in measurement and adjustment in order to ensure that the assembly clearance is within the design range during assembly.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: a cylindrical gear differential structure, including an input wheel, a housing and a screw, a left planetary gear and a right planetary gear are installed inside the housing, and a planetary gear shaft is inserted into the inner sides of the left planetary gear and the right planetary gear, and a pressure cover is fixedly installed on both sides of the housing, and a left output wheel and a right output wheel are respectively sleeved and installed on both sides of the outside of the housing, the inner gear ring of the left output wheel is meshed with the left planetary gear, the inner gear ring of the right output wheel is meshed with the right planetary gear, the left planetary gear is meshed with the right planetary gear, and all of them are meshed with cylindrical gears, and teeth are provided on the outer side of the housing, and the input wheel is meshed with the housing through the teeth.

[0006] The utility model is further configured as follows: bearings are sleeved and installed on opposite sides of the two glands, the glands are fixedly connected to the housing via the screws, and there are three left planetary gears, three right planetary gears and three planetary gear shafts.

[0007] The beneficial effects of the utility model are as follows: the utility model adopts the left output wheel inner ring gear to mesh with the left planetary gear; the right output wheel inner ring gear to mesh with the right planetary gear; the left planetary gear to mesh with the right planetary gear, all of which are cylindrical gears meshing. Compared with the existing differential structure that adopts bevel gear meshing to realize the differential function, the cylindrical gear tooth profile processing machine tool has high versatility and easy to ensure the processing accuracy. The bevel gear tooth profile requires a special machine tool and it is difficult to ensure the processing accuracy. The parallel mounting holes of the cylindrical gears are easy to process, and the right-angle mounting holes of the bevel gears are difficult to process. During assembly, the cylindrical gears can be directly assembled, and the operating skills required are low. The bevel gears need to measure and adjust the gear meshing clearance, and the operation is complicated and the requirements are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 It is a schematic structural diagram of the utility model as a whole.

[0010] Figure 2 It is a top view of the present utility model.

[0011] Figure 3 This utility model Figure 1 Cross-section view along the AA direction.

[0012] Figure 4 This utility model Figure 1 Cross-section along the BB direction.

[0013] Figure 5 This utility model Figure 1 Cross-section view in the CC direction.

[0014] In the figure, 1. bearing; 2. gland; 3. left output gear; 4. input gear; 5. right output gear; 6. planetary gear shaft; 7. left planetary gear; 8. right planetary gear; 9. housing; 10. screw. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0016] See also Figure 1-5 The utility model provides a technical solution: a technical solution of a cylindrical gear differential structure, including an input wheel 4, a housing 9 and a screw 10. The left planetary gear 7 and the right planetary gear 8 are installed inside the housing 9, and the planetary gear shaft 6 is inserted into the inner sides of the left planetary gear 7 and the right planetary gear 8. The housing 9 is fixedly installed with a pressure cover 2 on both sides. The left output wheel 3 and the right output wheel 5 are respectively sleeved and installed on both sides of the outside of the housing 9. The outside of the housing 9 is provided with teeth. The input wheel 4 is meshed with the housing 9 through the teeth, the inner gear ring of the left output wheel 3 is meshed with the left planetary gear 7, the inner gear ring of the right output wheel 5 is meshed with the right planetary gear 8, the left planetary gear 7 is meshed with the right planetary gear 8, and the left planetary gear 8 is meshed with the right planetary gear 8, and all of them are cylindrical gears.

[0017] Preferably, bearings 1 are sleeved and mounted on opposite sides of the two glands 2 .

[0018] Preferably, the gland 2 is fixedly connected to the housing 9 via screws 10 .

[0019] Preferably, there are three left planetary gears 7, three right planetary gears 8 and three planetary gear shafts 6.

[0020] Working principle: The planetary gear shaft 6 is inserted into the left planetary gear 7 and the right planetary gear 8 respectively, and then placed in the housing 9. The glands 2 are installed at both ends, and the screws 10 are inserted and tightened. Then the bearing 1 is installed, the input wheel 4 is connected, and the left output wheel 3 and the right output wheel 5 are installed to form a cylindrical gear differential structure. (As shown in the attached figure, Figure 1 As shown), when traveling in a straight line, the input wheel 4 drives the outer ring gear of the housing 9, which drives the left planetary wheel 7 and the right planetary wheel 8 through the planetary wheel shaft 6, and then drives the left output wheel 3 and the right output wheel 5 through the planetary wheels, and the whole rotates synchronously along the center of the housing 9 (there is no relative rotation);

[0021] The specific differential principle is as follows:

[0022] Combined with attachment Figure 2 Taking a right turn as an example (the same applies to left turns), a cylindrical gear differential structure moves forward as a whole, forming an arc path centered on the turning center point and with the turning radius as the radius. Because the left output wheel 3 has a larger turning radius and a longer arc path, the left output wheel 3 rotates faster. On the other hand, the right output wheel 5 has a smaller turning radius and a shorter arc path, so it rotates slower. This creates a speed difference between the two output wheels.

[0023] Combined with attachment Figure 3 : The left output wheel 3 rotates faster relative to the housing 9, and the inner gear ring of the output wheel engages with the left planetary gear 7 to rotate forward;

[0024] Combined with attachment Figure 4: The left planetary gear 7 and the right planetary gear 8 are meshed with each other and rotate in opposite directions;

[0025] Combined with attachment Figure 5 : The right output wheel 5 rotates at a reduced speed relative to the housing 9, and the inner gear ring of the output wheel engages with the right planetary gear 8 and rotates in the opposite direction;

[0026] This achieves the effect of accelerating the rotation of the left output wheel 3 and decelerating the rotation of the right output wheel 5. The differential rotation function of the output wheels on both sides forms rolling friction relative to the ground, reduces resistance and improves efficiency.

[0027] By the same principle, when turning left, the left output wheel 3 can decelerate and the right output wheel 5 can accelerate, achieving the function of differential rotation of the output wheels on both sides.

[0028] The invention discloses a cylindrical gear differential structure which can be used in wheeled walking machinery with different wheel speeds on both sides when turning.

[0029] It should be noted that, in this document, 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 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 comprising 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, and the standard parts used in this application document can all be purchased from the market and can be customized according to the description and drawings. The specific connection method of each part adopts the mature conventional means in the prior art, the machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cylindrical gear differential structure, comprising an input wheel (4), a housing (9) and a screw (10), characterized in that: A left planetary gear (7) and a right planetary gear (8) are installed inside the housing (9), and a planetary gear shaft (6) is inserted into the inner sides of the left planetary gear (7) and the right planetary gear (8). A pressure cover (2) is fixedly installed on both sides of the housing (9), and a left output wheel (3) and a right output wheel (5) are respectively sleeved and installed on both sides of the outside of the housing (9). The inner gear ring of the left output wheel (3) is meshed with the left planetary gear (7), the inner gear ring of the right output wheel (5) is meshed with the right planetary gear (8), and the left planetary gear (7) is meshed with the right planetary gear (8), and all of them are meshed with cylindrical gears.

2. The cylindrical gear differential structure according to claim 1, characterized in that: The outer side of the housing (9) is provided with teeth, and the input wheel (4) is engaged with the housing (9) through the teeth.

3. The cylindrical gear differential structure according to claim 1, characterized in that: The two opposite sides of the two glands (2) are both sleeve-mounted with bearings (1).

4. The cylindrical gear differential structure according to claim 1, characterized in that: The pressure cover (2) is fixedly connected to the housing (9) via the screws (10).

5. The cylindrical gear differential structure according to claim 1, characterized in that: There are three of each of the left planetary gear (7), the right planetary gear (8) and the planetary gear shaft (6).

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