High-strength gearbox

Abstract

The utility model relates to the field of mechanical transmission devices, in particular to a high-strength gearbox. The gearbox comprises a shell, a first connecting cover, a second connecting cover, a multi-stage speed reducing mechanism and an output shaft, a mounting cavity is formed in the shell, the first connecting cover and the second connecting cover, the multi-stage speed reducing mechanism is mounted in the mounting cavity, and the bottom of the output shaft is connected with the multi-stage speed reducing mechanism and extends out of the top of the first connecting cover. An outer tooth part is arranged on the outer surface of the output shaft and used for being in spline connection with external equipment. The effect of improving the stability and reliability of the gearbox is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mechanical transmission devices, in particular to a high-strength gear box. BACKGROUND

[0002] As an important mechanical device, the gear box is widely used in industrial production, transportation and other fields, and is mainly used for power transmission and speed adjustment. With the continuous development of modern industrial technology, the gear box plays an important role in improving work efficiency and reducing energy consumption. Especially in high-precision and high-performance mechanical equipment, the application of the gear box is more critical, which can effectively improve the running stability and reliability of the whole system.

[0003] In order to meet the needs of different application scenarios, various ways are adopted in the prior art to enhance the connection strength and stability of the gear box. Common methods include the use of flat keys or tenons and other mechanical connecting parts, which can effectively transmit torque and ensure the stability of the connection to a certain extent. However, the conventional means still have obvious shortcomings when dealing with scenarios such as nail guns or drills that require large torque and impact. In particular, in terms of connection strength, the existing connection methods often cannot fully meet the requirements of high-load working conditions, which can easily lead to unstable connection and even cause safety accidents and property losses. CONTENT OF THE INVENTION

[0004] The purpose of the application is to provide a high-strength gear box that can improve the stability and reliability of the gear box.

[0005] The high-strength gear box provided by the application adopts the following technical solutions:

[0006] A high-strength gear box, comprising a housing, a first connecting cover, a second connecting cover, a multi-stage reduction mechanism and an output shaft, the top of the housing is connected to the first connecting cover, the bottom of the housing is connected to the second connecting cover, the multi-stage reduction mechanism is installed inside the housing, the bottom of the output shaft is connected to the multi-stage reduction mechanism, and the top of the output shaft passes through the first connecting cover and extends out from the top of the first connecting cover.

[0007] The outer surface of the output shaft is provided with a spline part, which is used to connect the output shaft with the external transmission structure.

[0008] By adopting the above technical solutions, the application increases the contact area between the output shaft and the external transmission structure through the design of the spline part of the output shaft, thereby significantly improving the connection strength, making the gear box suitable for working environments that require large torque and impact, and improving the stability and reliability of the gear box.

[0009] Further, the first connecting cover top is provided with at least two guide columns formed integrally, which are used for plugging external equipment.

[0010] By adopting the above technical scheme, the guide columns formed integrally are used for plugging external equipment, further enhancing the connection stability, and improving the convenience and reliability of disassembling the gear box.

[0011] Further, the output shaft comprises a shaft rotating disc and a shaft body, the shaft body is integrally formed with the center of the shaft rotating disc top, the shaft rotating disc is located in the installation cavity and connected with the multi-stage reduction mechanism;

[0012] The shaft body passes through the first connecting cover and extends from the first connecting cover top, and the shaft body is provided with a first bearing and a second bearing at the first connecting cover.

[0013] By adopting the above technical scheme, the design of the shaft rotating disc and the shaft body enables the output shaft to rotate stably in the installation cavity, and the effective connection with the multi-stage reduction mechanism guarantees the efficiency and stability of power transmission. The shaft body passes through the first connecting cover and extends from the top, which is convenient for connecting with external equipment. In addition, the first bearing and the second bearing reduce friction loss, improve the reliability and service life of the gear box.

[0014] Further, the shell is connected with the second connecting cover through at least eight screws, and a motor connecting hole is formed in the middle of the second connecting cover.

[0015] By adopting the above technical scheme, the shell is connected with the second connecting cover through at least eight screws, effectively improving the radial connection strength between the shell and the second connecting cover, thereby enhancing the structural stability of the entire gear box. At the same time, the motor connecting hole formed in the middle of the second connecting cover facilitates the installation and fixation of the motor, ensuring the reliable connection between the motor and the gear box, and improving the overall performance and safety of the equipment.

[0016] Further, the multi-stage reduction mechanism comprises a first-stage reduction assembly, a second-stage reduction assembly and a third-stage reduction assembly connected in sequence, the first-stage reduction assembly is installed on the second connecting cover top, and the third-stage reduction assembly top is connected with the output shaft bottom.

[0017] By adopting the above technical scheme, the multi-stage reduction mechanism is provided, so that the gear box can effectively reduce the rotating speed of the output shaft and increase the torque in the application scene with large torque and impact, ensuring the stability and reliability of power transmission. The first-stage reduction assembly is installed on the second connecting cover top, which can better utilize the space layout and improve the structural compactness. The third-stage reduction assembly top is connected with the output shaft bottom, further improving the transmission efficiency and stability of the entire system.

[0018] Further, the primary reduction assembly comprises a primary main gear, a primary transmission disc and a plurality of primary slave gears, the plurality of primary slave gears are connected with the primary transmission disc through a plurality of primary connecting shafts, the primary main gear is aligned with the center of the motor connecting hole, and the primary main gear is meshed with the plurality of primary slave gears.

[0019] By adopting the above technical scheme, the plurality of primary slave gears in the primary reduction assembly are connected with the primary transmission disc through the primary connecting shafts, so that the power transmission is more uniform, and the stability and reliability of the system are improved. Meanwhile, the primary main gear is aligned with the center of the motor connecting hole, so that the accuracy and efficiency of power transmission are ensured. The meshing between the primary main gear and the plurality of primary slave gears not only increases the reduction ratio, but also disperses the load and prolongs the service life of the gears.

[0020] Further, the secondary reduction assembly comprises a secondary main gear, a secondary transmission disc and a plurality of secondary slave gears, the plurality of secondary slave gears are connected with the secondary transmission disc through a plurality of secondary connecting shafts, the secondary main gear is aligned with the center of the primary main gear, and the secondary main gear is meshed with the plurality of secondary slave gears.

[0021] By adopting the above technical scheme, the secondary reduction assembly can effectively achieve the purpose of further speed reduction and torque increase, the meshing between the secondary main gear and the plurality of secondary slave gears can improve the transmission efficiency and stability, and ensure the reliability and accuracy of power transmission. Meanwhile, the center of the secondary main gear is aligned with the center of the primary main gear, so that the coaxiality and synchronous operation between the gears are ensured, the vibration and noise are reduced, and the working performance of the entire gear box is improved.

[0022] Further, the tertiary reduction assembly comprises a tertiary main gear and a plurality of tertiary slave gears, the plurality of tertiary slave gears are connected with the shaft disc through a plurality of tertiary connecting shafts, the center of the tertiary main gear is aligned with the center of the tertiary main gear, and the tertiary main gear is meshed with the plurality of tertiary slave gears.

[0023] By adopting the above technical scheme, the meshing between the tertiary main gear and the plurality of tertiary slave gears in the tertiary reduction assembly makes the power transmission more stable, and improves the transmission efficiency and reliability.

[0024] Further, the length of the primary main gear is less than the length of the secondary main gear, and the length of the secondary main gear is less than the length of the tertiary main gear.

[0025] And / or, the thickness of the primary main gear is less than the thickness of the secondary main gear, and the thickness of the secondary main gear is less than the thickness of the tertiary main gear.

[0026] By adopting the above technical solutions, the length and thickness of the first, second and third main gears gradually increase, so that the cooperation between the multi-stage reduction assemblies is more stable. Since the third main gear is closest to the external device, it is subjected to the largest torsion and impact, so the thickness needs to be increased to increase the contact area and disperse the load. In this way, the torsion and impact that can be resisted are increased, so that the transmission efficiency and reliability of the entire multi-stage reduction mechanism are improved. At the same time, this design can better disperse the load, reduce the wear of each gear, and prolong the service life of the gear box.

[0027] Further, the inner surface of the shell is provided with an inner tooth portion, and the plurality of first, second and third slave gears are in meshing relationship with the inner tooth portion.

[0028] By adopting the above technical solutions, the inner tooth portion provided on the inner surface of the shell is in meshing relationship with the first, second and third slave gears, which can improve the stability of the internal structure of the gear box and enhance the transmission accuracy and reliability between the multi-stage reduction assemblies. At the same time, this design can also effectively disperse the load, reduce the wear between the gears, and prolong the service life of the gear box.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. The spline portion provided on the outer surface of the output shaft increases the contact area with the external transmission structure, significantly improves the connection strength of the output shaft, and thus avoids safety accidents caused by unstable connection;

[0031] 2. The integrally formed output shaft carrier increases the structural strength of the output part of the gear box, thereby improving the transmission load and impact resistance of the gear box;

[0032] 3. The guide column integrally formed on the top of the first connecting cover can further improve the connection strength and facilitate quick disassembly and assembly, thereby improving the convenience and reliability of use;

[0033] 4. The shell is connected to the second connecting cover by at least eight screws, thereby enhancing the radial connection strength and ensuring the overall stability of the gear box under high load conditions. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0035] Figure 2 is a schematic diagram of the cross-sectional structure of the embodiment of the present application;

[0036] Figure 3 is a schematic diagram of the internal structure of the embodiment of the present application;

[0037] In the figure, 1, shell; 11, screw; 12, inner tooth part; 2, first connecting cover; 21, guide column; 3, second connecting cover; 31, motor connecting hole; 4, multi-stage reduction mechanism; 41, first-stage reduction assembly; 411, first-stage main gear; 412, first-stage transmission turntable; 413, first-stage driven gear; 42, second-stage reduction assembly; 421, second-stage main gear; 422, second-stage transmission turntable; 423, second-stage driven gear; 43, third-stage reduction assembly; 431, third-stage main gear; 432, third-stage driven gear; 5, output shaft; 51, spline part; 52, shaft turntable; 53, shaft body; 54, first bearing; 55, second bearing. DETAILED DESCRIPTION

[0038] The following description of the application will be made in conjunction with the accompanying drawings as follows: Figure 1 - The accompanying drawings Figure 3 The technical solutions of the present application are described clearly and completely, and the described embodiments are only possible technical implementations of the present application, not all possible implementations. Those skilled in the art can easily obtain other embodiments by combining the embodiments of the present application without creative labor, and these embodiments are also within the protection scope of the present application.

[0039] The inventor of the present application found that the existing gear box has insufficient connection strength in the scene of large torque and impact such as radio frequency gun or electric drill, which may cause unstable connection and eventually cause harm to person and property. Therefore, the present application mainly adopts the following scheme to improve the connection strength of the output shaft 5 and the external transmission structure, reduce the risk of unstable connection, and the following further detailed description of the present application.

[0040] The high-strength gear box provided by the embodiment of the present application refers to Figure 1 and Figure 2 , comprising a shell 1, a first connecting cover 2, a second connecting cover 3, a multi-stage reduction mechanism 4 and an output shaft 5. Among them, the top of the shell 1 is connected with the first connecting cover 2, the bottom of the shell 1 is connected with the second connecting cover 3, the multi-stage reduction mechanism 4 is installed inside the shell 1, the bottom of the output shaft 5 is connected with the multi-stage reduction mechanism 4, and the top of the output shaft 5 passes through the first connecting cover 2 and extends out from the top of the first connecting cover 2. The outer surface of the output shaft 5 is provided with a spline part 51, and the spline part 51 is used to connect the output shaft 5 with the external transmission structure.

[0041] As Figure 2 and Figure 3As shown, the output shaft 5 of the embodiment of the application comprises a shaft rotating disc 52 and a shaft body 53. The shaft body 53 is integrally formed with the center of the top of the shaft rotating disc 52, and the shaft rotating disc 52 is located in the mounting cavity and connected with the multi-stage speed reduction mechanism 4. The shaft body 53 passes through the first connecting cover 2 and extends out of the top of the first connecting cover 2, and the shaft body 53 is sleeved with a first bearing 54 and a second bearing 55 at the first connecting cover 2. The inner and outer rings of the first bearing 54 and the second bearing 55 are tightly matched with the shaft body 53 and the first connecting cover 2 respectively, so as to ensure stable and reliable transmission. In the specific implementation process, the first bearing 54 and the second bearing 55 can be selected as ball bearings or tapered roller bearings, so as to reduce the frictional resistance and prolong the service life.

[0042] As Figure 1 shown, the first connecting cover 2 of the embodiment of the application is provided with two integrally formed guide columns 21 at the top of the body, and the guide columns 21 are used for plugging external devices. The material of the guide columns 21 can be selected as stainless steel or aluminum alloy, which has good corrosion resistance and sufficient rigidity. The diameter of the guide columns 21 can be adjusted according to actual needs, and is generally 5-10mm, and the length is 20-30mm, so as to ensure the stability and convenience during plugging. The top end of the guide column 21 can be designed as a chamfer or an arc, so as to be easily plugged into the corresponding hole of the external device. In the specific implementation process, the guide column 21 can also be provided as three or more according to actual needs.

[0043] As Figure 1 shown, the shell 1 of the embodiment of the application is connected with the second connecting cover 3 through eight screws 11, and the eight screws 11 are uniformly distributed on the connecting surface of the shell 1 and the second connecting cover 3, so as to ensure the firmness and reliability of the connecting part. The specification of the screw 11 can be M6 or M8, and the material is selected as high-strength steel, so as to bear larger tensile force and shear force. The contact surface of the shell 1 and the second connecting cover 3 can be precisely processed, so as to ensure flatness without burrs and prevent damage due to stress concentration.

[0044] As Figure 2 and Figure 3As shown, the multi-stage speed reduction mechanism 4 of the embodiment of the present application comprises a first-stage speed reduction assembly 41, a second-stage speed reduction assembly 42 and a third-stage speed reduction assembly 43 connected in sequence. The first-stage speed reduction assembly 41 is installed on the top of the second connecting cover 3, and the top of the third-stage speed reduction assembly 43 is connected with the bottom of the output shaft 5. The specific structure of each speed reduction assembly is as follows: the first-stage speed reduction assembly 41 comprises a first-stage main gear 411, a first-stage transmission turntable 412 and three first-stage slave gears 413. The three first-stage slave gears 413 are connected with the first-stage transmission turntable 412 through three first-stage connecting shafts, the center of the first-stage main gear 411 is aligned with the center of the motor connecting hole 31, and the first-stage main gear 411 is in mesh with the three first-stage slave gears 413. The module of the first-stage main gear 411 and the first-stage slave gears 413 can be selected as 1.5-2.0, the pressure angle is 20°, and the tooth width is 15-20 mm, so as to ensure sufficient load capacity and wear resistance. The material of the first-stage main gear 411 and the first-stage slave gears 413 can be selected as 40Cr alloy steel, which is subjected to carburizing quenching treatment, and the hardness reaches HRC58-62, so as to improve the fatigue resistance. The second-stage speed reduction assembly 42 comprises a second-stage main gear 421, a second-stage transmission turntable 422 and three second-stage slave gears 423. The three second-stage slave gears 423 are connected with the second-stage transmission turntable 422 through three second-stage connecting shafts, the center of the second-stage main gear 421 is aligned with the center of the first-stage main gear 411, and the second-stage main gear 421 is in mesh with the three second-stage slave gears 423. The module of the second-stage main gear 421 and the second-stage slave gears 423 can be selected as 1.8-2.2, the pressure angle is 20°, and the tooth width is 18-25 mm. The material of the second-stage main gear 421 and the second-stage slave gears 423 can also be selected as 40Cr alloy steel, which is subjected to carburizing quenching treatment, and the hardness reaches HRC58-62. The third-stage speed reduction assembly 43 comprises a third-stage main gear 431 and three third-stage slave gears 432. The three third-stage slave gears 432 are connected with the shaft turntable 52 through three third-stage connecting shafts, the center of the third-stage main gear 431 is aligned with the center of the third-stage main gear 431, and the third-stage main gear 431 is in mesh with the three third-stage slave gears 432. The module of the third-stage main gear 431 and the third-stage slave gears 432 can be selected as 2.0-2.5, the pressure angle is 20°, and the tooth width is 20-30 mm. The material of the third-stage main gear 431 and the third-stage slave gears 432 can also be selected as 40Cr alloy steel, which is subjected to carburizing quenching treatment, and the hardness reaches HRC58-62.

[0045] In order to further optimize the speed reduction effect, the length of the first-stage main gear 411 is less than the length of the second-stage main gear 421, and the length of the second-stage main gear 421 is less than the length of the third-stage main gear 431; at the same time, the thickness of the first-stage main gear 411 is less than the thickness of the second-stage main gear 421, and the thickness of the second-stage main gear 421 is less than the thickness of the third-stage main gear 431. This progressive gear design can gradually increase the torque transmission capacity, reduce the load of a single gear, and improve the overall transmission efficiency and service life.

[0046] As Figure 2 shown, the inner surface of the shell 1 is provided with an inner tooth portion 12, which is in meshing engagement with the three primary gear wheels 413, the three secondary gear wheels 423 and the three tertiary gear wheels 432. The modulus and pressure angle of the inner tooth portion 12 are consistent with the corresponding gear wheels, so as to ensure accurate meshing. The material of the inner tooth portion 12 can be cast iron or steel, which has a hardness of HB200-250 after heat treatment, so as to improve wear resistance and pressure resistance.

[0047] The implementation principle of the embodiment is that the spline portion 51 is arranged on the outer surface, the contact area of the output shaft 5 and the external transmission structure is increased, and the connection strength is improved. The design of the guide column 21 makes the plug-in more convenient and fast, and reduces the assembly time. The shell 1 and the second connecting cover 3 are connected through a plurality of screws 11, the radial connection strength is enhanced, and the loosening phenomenon under high load working conditions is avoided. The multi-stage reduction mechanism 4 realizes efficient power transmission and torque amplification through reasonable gear design, meets the demand of large torque and impact application of the radio frequency gun or the electric drill and the like. The whole gear box structure is compact, transmission is stable, and durability is strong, which significantly improves the safety and reliability of the product.

[0048] In another embodiment, a layer of anti-skid coating can be additionally arranged on the spline portion 51 of the output shaft 5, so as to further improve the stability of the connection. The anti-skid coating can be polyurethane rubber or nylon, which has a high friction coefficient and excellent wear resistance. In addition, an elastic buckle can be additionally arranged at the end of the guide column 21. When the guide column 21 is inserted into the hole of the external device, the elastic buckle automatically pops out, plays a locking role, and prevents accidental falling. The addition of the anti-skid coating greatly improves the friction between the output shaft 5 and the external transmission structure, which can maintain stable connection even in a humid or oily environment. The design of the elastic buckle provides additional safety protection during the plug-in process, avoiding the disconnection phenomenon caused by vibration or other external factors. The two improvement measures jointly act, further enhancing the applicability and safety of the gear box under complex working conditions.

[0049] The embodiments of the specific embodiment are the preferred embodiments of the application, and are not limited to the protection scope of the application. The same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape and principle of the application should be covered by the protection scope of the application.

Claims

1. A high-strength gear case characterized by, The utility model provides a multi -stage reduction gear mechanism, it includes shell (1), first connecting cover (2), second connecting cover (3), multi -stage reduction gear mechanism (4) and output shaft (5), the top of shell (1) is connected first connecting cover (2), the bottom of shell (1) is connected second connecting cover (3), multi -stage reduction gear mechanism (4) is installed inside shell (1), the bottom of output shaft (5) is connected with multi -stage reduction gear mechanism (4), and the top of output shaft (5) passes through first connecting cover (2) and extends from first connecting cover (2) top, The outer surface of the output shaft (5) is provided with a spline part (51), and the spline part (51) is used to connect the output shaft (5) with an external transmission structure.

2. A high-strength gear case according to claim 1, characterized in that The top of the first connecting cover (2) body is provided with at least two guide columns (21) integrally formed, and the guide columns (21) are used for inserting an external device.

3. A high-strength gear case according to claim 1 or 2, characterized in that The output shaft (5) includes a shaft rotating disc (52) and a shaft body (53), the shaft body (53) is integrally formed with the center of the top of the shaft rotating disc (52), the shaft rotating disc (52) is located in a mounting cavity and connected with the multi-stage reduction gear mechanism (4); The shaft body (53) passes through the first connecting cover (2) and extends from the top of the first connecting cover (2), and the shaft body (53) is sleeved with a first bearing (54) and a second bearing (55) at the position of passing through the first connecting cover (2).

4. A high-strength gear case according to claim 3, characterized in that The shell (1) is connected with the second connecting cover (3) by at least eight screws (11), and a motor connecting hole (31) is formed in the middle of the second connecting cover (3).

5. A high-strength gear case according to claim 4, characterized in that The multi-stage reduction gear mechanism (4) includes a first-stage reduction assembly (41), a second-stage reduction assembly (42) and a third-stage reduction assembly (43) connected in sequence, the first-stage reduction assembly (41) is installed on the top of the second connecting cover (3), and the top of the third-stage reduction assembly (43) is connected with the bottom of the output shaft (5).

6. A high-strength gear case according to claim 5, characterized in that The first-stage reduction assembly (41) includes a first-stage main gear (411), a first-stage transmission rotating disc (412) and a plurality of first-stage slave gears (413), the plurality of first-stage slave gears (413) are connected with the first-stage transmission rotating disc (412) through a plurality of first-stage connecting shafts, the center of the first-stage main gear (411) is aligned with the center of the motor connecting hole (31), and the first-stage main gear (411) is meshed with the plurality of first-stage slave gears (413).

7. A high-strength gear case according to claim 6, characterized in that The second-stage reduction assembly (42) includes a second-stage main gear (421), a second-stage transmission rotating disc (422) and a plurality of second-stage slave gears (423), the plurality of second-stage slave gears (423) are connected with the second-stage transmission rotating disc (422) through a plurality of second-stage connecting shafts, the center of the second-stage main gear (421) is aligned with the center of the first-stage main gear (411), and the second-stage main gear (421) is meshed with the plurality of second-stage slave gears (423).

8. A high-strength gear case according to claim 7, characterized in that The three-stage speed reduction assembly (43) comprises a three-stage main gear (431) and a plurality of three-stage slave gears (432), the plurality of three-stage slave gears (432) are connected with the shaft turntable (52) through a plurality of three-stage connecting shafts, the center of the three-stage main gear (431) is aligned with the center of the three-stage main gear (431), and the three-stage main gear (431) is meshed with the plurality of three-stage slave gears (432).

9. A high-strength gear case according to claim 8, characterized in that The length of the first-stage main gear (411) is less than the length of the second-stage main gear (421), and the length of the second-stage main gear (421) is less than the length of the three-stage main gear (431). And / or, the thickness of the first-stage main gear (411) is less than the thickness of the second-stage main gear (421), and the thickness of the second-stage main gear (421) is less than the thickness of the three-stage main gear (431).

10. A high-strength gear case according to claim 8 or 9, characterized in that The inner surface of the shell (1) is provided with an inner tooth portion (12), the inner tooth portion (12) is meshed with the plurality of first-stage slave gears (413), the plurality of second-stage slave gears (423) and the plurality of third-stage slave gears (432).

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