Gear assembly and gearbox comprising same

Abstract

The gear assembly comprises a gear, outer teeth are arranged on the periphery of the gear, and the gear assembly is characterized by further comprising a gear protection sleeve, protection sleeve outer teeth are arranged on the periphery of the gear protection sleeve, an embedding groove is further formed in the gear protection sleeve, clamping teeth are further arranged on the periphery of the gear, and the clamping teeth are arranged on the periphery of the gear. A clamping groove is formed in the inner circumference of the embedding groove, at least one part of the gear is inserted into the embedding groove, and the clamping teeth and the clamping groove are clamped together; according to the gear assembly, the detachable gear protection sleeve is arranged on the gear, the gear protection sleeve can replace one end of the gear to be in transmission connection with a high-speed rotating external carrier (such as a high-speed rotating motor shaft), only the gear protection sleeve needs to be replaced when the gear assembly is damaged, and the replacement cost is low; the second transmission gear can be matched with gear protection sleeves with different transmission tooth numbers, so that different transmission ratios can be achieved without replacing the whole second transmission gear, and the universality of the whole gear assembly is high.

Description

Technical Field

[0001] This utility model specifically relates to a gear assembly and a gearbox including the gear assembly. Background Technology

[0002] Existing gearbox structures generally include a housing, a motor, a planetary reduction gear assembly, a first transmission gear, a second transmission gear, and an output shaft. The housing has a first mounting part and a second mounting part, with the second mounting part located on one side of the first mounting part. The motor and the second transmission gear are both mounted on the first mounting part, with one end of the second transmission gear being driven by the motor shaft. The first transmission gear is mounted on the second mounting part, with the other end of the second transmission gear being driven by the first transmission gear. The planetary reduction gear assembly is mounted on the first transmission gear and is driven by the first transmission gear. The output shaft is connected to the planetary reduction gear assembly, with one end of the output shaft extending out of the housing.

[0003] However, the above-mentioned gearbox structure still has the following shortcomings: (1) The high-speed rotating motor shaft and the transmission point of the second transmission gear are prone to wear, making the second transmission gear easy to be damaged. When replacing it, the second transmission gear needs to be replaced entirely, resulting in high replacement costs; (2) The two ends of the second transmission gear are respectively connected to the motor shaft and the first transmission gear, but the number of transmission teeth of the second transmission gear itself is fixed, that is, the transmission ratio is fixed, and it can only meet one transmission requirement, resulting in poor versatility. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a gear assembly with low replacement cost and high versatility.

[0005] Another objective of this invention is to provide a gearbox including the aforementioned gear assembly.

[0006] The purpose of this utility model is achieved as follows:

[0007] A gear assembly includes a gear with external teeth on its outer periphery. It further includes a gear protective sleeve with external teeth on its outer periphery and an insertion groove. The gear also has retaining teeth on its outer periphery, and a retaining slot on its inner periphery. At least a portion of the gear is inserted into the insertion groove, and the retaining teeth engage with the retaining slot. This gear assembly, by providing a detachable gear protective sleeve, allows one end of the gear to be connected to a high-speed rotating external carrier (such as a high-speed rotating motor shaft) for transmission. When damaged, only the gear protective sleeve needs to be replaced, resulting in low replacement costs. Furthermore, the gear end with the protective sleeve has better overall strength, facilitating a stable transmission connection with the external carrier. Additionally, a second transmission gear can be fitted with gear protective sleeves of different numbers of transmission teeth, thus achieving different transmission ratios without replacing the entire second transmission gear, making the entire gear assembly highly versatile.

[0008] The objective of this utility model can also be achieved by the following technical measures:

[0009] Specifically, the gear has external teeth and locking teeth arranged on its outer periphery at the top and bottom positions, and the highest edge of the gear protective sleeve is lower than half the height of the gear. The gear protective sleeve occupies a small proportion of the total gear volume, that is, the gear protective sleeve is small in size and low in cost. At the same time, the small size of the gear protective sleeve does not affect its stable use.

[0010] Specifically, the outer diameter of the locking tooth is smaller than the outer diameter of the outer tooth, so that the locking tooth will not affect the stable meshing between the outer tooth and the outside.

[0011] Specifically, the cross-sections of the teeth and grooves are both dovetail-shaped; the dovetail-shaped teeth and grooves are tightly connected and have a good fit, ensuring the synchronous rotation of the gear and the gear protective sleeve.

[0012] Specifically, along the vertical direction of the gear, the lower end face of the corresponding outer tooth of the locking tooth is equilateral trapezoidal; the outer tooth of this shape is conducive to stable meshing with the outside.

[0013] Specifically, the gear protective sleeve is integrally molded from POM wear-resistant material in one piece to give it good wear resistance, so that it can maintain a long service life even in high-speed transmission working environments.

[0014] Another objective of this utility model is achieved as follows;

[0015] A gearbox including the aforementioned gear assembly comprises a housing, a motor, a planetary reduction gear assembly, an output shaft, and a transmission gear. The housing has a first mounting portion and a second mounting portion, with the second mounting portion located on one side of the first mounting portion. The motor and gear assembly are both mounted on the first mounting portion, the transmission gear is mounted on the second mounting portion and has external transmission teeth that mesh with the external teeth of the gear. The planetary reduction gear assembly is mounted on the transmission gear and is connected to the transmission gear. The output shaft is connected to the planetary reduction gear assembly and one end of the output shaft extends out of the housing. The motor shaft has a worm gear section, and the external teeth of the gear protective sleeve mesh with the worm gear section. In this gearbox, the gear assembly achieves stable meshing and transmission with the motor shaft through the gear protective sleeve, resulting in good performance. Furthermore, the installation of the transmission gear and planetary reduction gear assembly on the second mounting portion is independent of the installation of the gear assembly and the motor on the first mounting portion, making installation simpler and more convenient.

[0016] Specifically, the transmission gear is provided with a support platform, the planetary reduction assembly is placed on the support platform and is connected to the support platform in a transmission manner; the support platform provides an installation carrier and a transmission carrier for the planetary reduction assembly, which is conducive to the stable operation of the planetary reduction assembly.

[0017] Specifically, the housing includes a connected base and an upper shell. The base is provided with a first lower groove and a second lower groove, and the upper shell is provided with a first upper groove and a second upper groove. The first lower groove and the first upper groove form the first mounting part, and the second lower groove and the second upper groove form the second mounting part. Its structure is simple and easy to implement, which facilitates the installation of motors, gear assemblies, transmission gears and planetary reduction assemblies in the housing.

[0018] Specifically, it further includes a fixed shaft, a lower fixed seat with a lower fixed groove on the base, an upper fixed seat with an upper fixed groove on the upper shell, the fixed shaft passing through the gear assembly, and the upper and lower ends of the fixed shaft extending into the upper and lower fixed grooves respectively; the upper and lower fixed grooves can play a good role in the installation and restriction of the upper and lower sections of the fixed shaft, ensuring the stability of the installation position of the fixed shaft, thereby facilitating the stable rotation of the gear assembly on the fixed shaft.

[0019] The beneficial effects of this utility model are as follows:

[0020] This gear assembly features a removable gear protective sleeve on the gear. This sleeve can replace one end of the gear in the transmission connection with a high-speed rotating external carrier (such as a high-speed rotating motor shaft). When damaged, only the gear protective sleeve needs to be replaced, resulting in low replacement costs. At the same time, the gear end with the protective sleeve has better overall strength, which is beneficial to the stable transmission connection with the external carrier. Furthermore, the second transmission gear can be matched with gear protective sleeves with different numbers of transmission teeth, so different transmission ratios can be achieved without replacing the entire second transmission gear, making the entire gear assembly highly versatile.

[0021] The gear protective sleeve accounts for a small proportion of the total gear volume, meaning that the gear protective sleeve is small in size and low in cost. At the same time, the small size of the gear protective sleeve does not affect its stable use.

[0022] In this gearbox, the gear assembly achieves stable meshing and transmission with the motor shaft through the gear protective sleeve, which has a good implementation effect. Furthermore, the installation of the transmission gear and planetary reduction assembly on the second mounting part is independent of the installation of the gear assembly and the motor on the first mounting part, making the installation relatively simple and convenient. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the gear assembly of this utility model.

[0024] Figure 2 This is a perspective view of the gear of this utility model.

[0025] Figure 3 This is a perspective view of the gear protective sleeve of this utility model.

[0026] Figure 4 This is a schematic diagram of the gearbox of this utility model.

[0027] Figure 5 This is a disassembled view of the gearbox of this utility model.

[0028] Figure 6 This is another disassembled view of the gearbox of this utility model. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Implementation examples, in conjunction with Figures 1 to 3As shown, a gear assembly includes a gear 1 with external teeth 11 on its outer periphery. The gear 1 also includes a gear protective sleeve 2 with external teeth 21 on its outer periphery. The gear protective sleeve 2 also has an insert groove 22, and the gear 1 has a retaining tooth 12 on its outer periphery. The insert groove 22 has a retaining groove 23 on its inner periphery. At least a portion of the gear 1 is inserted into the insert groove 22, and the retaining tooth 12 and retaining groove 23 are engaged together.

[0031] As a specific solution, the outer periphery of the gear 1 is provided with external teeth 11 and locking teeth 12 at the upper and lower positions respectively, and the highest edge of the gear protective sleeve 2 is lower than half the height of the gear 1.

[0032] In this embodiment, the outer diameter of the locking tooth 12 is smaller than the outer diameter of the outer tooth 11.

[0033] In this embodiment, the cross-sections of both the locking teeth 12 and the locking groove 23 are dovetail-shaped.

[0034] As a more specific embodiment, the lower end face 111 of the corresponding outer tooth 11 of the gear 12 extends in an equilateral trapezoidal shape along the vertical direction of the gear 1.

[0035] As a preferred embodiment, the gear protective sleeve 2 is integrally molded from POM wear-resistant material in one piece.

[0036] Combination Figures 4 to 6 As shown, a gearbox including the aforementioned gear assembly includes a housing 3, a motor 4, a planetary reduction assembly 5, an output shaft 6, and a transmission gear 7. The housing 3 has a first mounting portion and a second mounting portion, with the second mounting portion located on one side of the first mounting portion. The motor 4 and the gear assembly are both mounted on the first mounting portion, the transmission gear 7 is mounted on the second mounting portion and has external transmission teeth 71 that mesh with the external teeth 11 of the gear 1, the planetary reduction assembly 5 is mounted on the transmission gear 7 and is connected to the transmission gear 7 in a transmission manner, the output shaft 6 is connected to the planetary reduction assembly 5 and one end of the output shaft 6 extends out of the housing 3, and the motor shaft 41 of the motor 4 has a worm section 411, with the external teeth 21 of the gear protective sleeve 2 meshing with the worm section 411.

[0037] As a more specific embodiment, the transmission gear 7 is provided with a support platform 72, the planetary reduction assembly 5 is placed on the support platform 72 and is connected to the support platform 72 in a transmission manner.

[0038] In this embodiment, the housing 3 includes a base 31 and an upper shell 32 connected to each other. The base 31 is provided with a first lower groove 311 and a second lower groove 312. The upper shell 32 is provided with a first upper groove 321 and a second upper groove 322. The first lower groove 311 and the first upper groove 321 form the first placement part, and the second lower groove 312 and the second upper groove 322 form the second placement part.

[0039] As a preferred embodiment, it also includes a fixed shaft 8, a lower fixed seat 313 is provided on the base 31, a lower fixed groove 314 is opened on the lower fixed seat 313, an upper fixed seat 323 is provided on the upper shell 32, an upper fixed groove 324 is opened on the upper fixed seat 323, the fixed shaft 8 passes through the gear assembly, and the upper and lower ends of the fixed shaft 8 extend into the upper fixed groove 324 and the lower fixed groove 314 respectively.

Claims

1. A gear assembly comprising a gear (1) having external teeth (11) disposed on the outer periphery of the gear (1), characterized in that, It also includes a gear protective sleeve (2), the outer periphery of which is provided with protective sleeve outer teeth (21), the gear protective sleeve (2) is also provided with an embedding groove (22), the outer periphery of the gear (1) is also provided with a locking tooth (12), the inner periphery of the embedding groove (22) is provided with a locking groove (23), at least a part of the gear (1) is inserted into the embedding groove (22) and the locking tooth (12) is engaged with the locking groove (23).

2. The gear assembly according to claim 1, characterized in that, The gear (1) has external teeth (11) and locking teeth (12) arranged on its outer periphery at the top and bottom positions respectively, and the highest edge of the gear protective sleeve (2) is lower than half the height of the gear (1).

3. The gear assembly according to claim 1, characterized in that, The outer diameter of the locking tooth (12) is smaller than the outer diameter of the outer tooth (11).

4. The gear assembly according to claim 1, characterized in that, The cross-sections of the tooth (12) and the groove (23) are both dovetail-shaped.

5. The gear assembly according to claim 3, characterized in that, The lower end face (111) of the corresponding external tooth (11) of the gear (12) extending along the vertical direction of the gear (1) is an equilateral trapezoid.

6. The gear assembly according to claim 1, characterized in that, The gear protective sleeve (2) is integrally molded from POM wear-resistant material in one piece.

7. A gearbox comprising the gear assembly of any one of claims 1-6, comprising a housing (3), a motor (4), a planetary reduction assembly (5), an output shaft (6), and a transmission gear (7), wherein the housing (3) has a first mounting portion and a second mounting portion, and the second mounting portion is located on one side of the first mounting portion, characterized in that, The motor (4) and gear assembly are both placed on the first mounting part, the transmission gear (7) is placed on the second mounting part and the transmission gear (7) is provided with transmission external teeth (71), the transmission external teeth (71) mesh with the external teeth (11) of the gear (1), the planetary reduction assembly (5) is placed on the transmission gear (7) and the planetary reduction assembly (5) is connected to the transmission gear (7) in a transmission connection, the output shaft (6) is connected to the planetary reduction assembly (5) and one end of the output shaft (6) extends out of the housing (3), the motor shaft (41) of the motor (4) is provided with a worm section (411), and the protective sleeve external teeth (21) of the gear protective sleeve (2) mesh with the worm section (411).

8. The gearbox according to claim 7, wherein the transmission gear (7) is provided with a support platform (72), the planetary reduction assembly (5) is placed on the support platform (72) and the planetary reduction assembly (5) is connected to the support platform (72) in a transmission connection.

9. The gearbox according to claim 7, characterized in that, The housing (3) includes a base (31) and an upper shell (32) connected to each other. The base (31) is provided with a first lower groove (311) and a second lower groove (312). The upper shell (32) is provided with a first upper groove (321) and a second upper groove (322). The first lower groove (311) and the first upper groove (321) form the first placement part, and the second lower groove (312) and the second upper groove (322) form the second placement part.

10. The gearbox according to claim 9, characterized in that, It also includes a fixed shaft (8), a lower fixed seat (313) is provided on the base (31), a lower fixed groove (314) is opened on the lower fixed seat (313), an upper fixed seat (323) is provided on the upper shell (32), an upper fixed groove (324) is opened on the upper fixed seat (323), the fixed shaft (8) passes through the gear assembly, and the upper and lower ends of the fixed shaft (8) extend into the upper fixed groove (324) and the lower fixed groove (314) respectively.

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