Single-speed gear box

Abstract

The utility model relates to the technical field of single-speed gear boxes, in particular to a single-speed gear box, which is provided with a gear box and a gear ring, and is characterized in that the bottom of the gear box is integrally connected in a sealed manner through a sealing plate, a shaft hole is arranged in the middle of the sealing plate, and positioning slots are uniformly distributed in the circumferential direction of the sealing plate at the bottom of the gear box. A positioning protrusion is arranged on the end face, connected with the gearbox box bottom, of the gear ring, the gearbox box is connected with the gear ring through the positioning protrusion and the inserting groove, a gearbox cover is arranged on the top of the gearbox box, the gearbox cover covers the top of the gearbox box, and the gearbox has the advantages of being simple in structure, high in strength, small in diameter, convenient to install and detach and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of single-speed gear boxes, in particular to a single-speed gear box with simple structure, high strength, small diameter and convenient installation and disassembly. Background Art

[0002] As we all know, electric drills are common products among power tools, and are also the most in-demand power tool products in the market, accounting for more than 40% of all power tool sales, and are widely used in the fields of construction, decoration, etc. In DC single-speed electric drills, the gearbox adopts a planetary gear mechanism as a whole.

[0003] In order to make the single-speed gearbox more convenient to use, the diameter of the gearbox is generally reduced as much as possible. At present, the connection method between the gearbox box and the gear ring of the existing gearbox is: a groove is provided on the inner wall of the gearbox box, and a protrusion matching the groove is provided on the outer wall of the gear ring. The gearbox box is connected to the gear ring by plugging the groove and the protrusion. In order to ensure the strength of the gearbox box and the gear ring, the diameter of the gearbox box and the gear ring cannot be reduced. Therefore, it is difficult to reduce the diameter of the gearbox box and the gear ring while ensuring the strength of the gearbox box and the gear ring, and it is inconvenient to disassemble and install. . Summary of the invention

[0004] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art and to provide a single-speed gearbox with simple structure, high strength, small diameter and convenient installation and disassembly.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A single-speed gearbox, provided with a gear box and a gear ring, characterized in that the bottom of the gear box is integrally closed and connected via a sealing plate, the middle of the sealing plate is provided with an axial hole, positioning slots are evenly distributed in the circumferential direction of the sealing plate at the bottom of the gear box, a positioning protrusion is provided on the end surface of the gear ring connected to the bottom of the gear box, the gear box is connected to the gear ring via the positioning protrusion and the slot, and a gear box cover is provided on the top of the gear box, and the gear box cover covers the top of the gear box.

[0007] The utility model discloses a gear ring with an annular gasket at one end close to the gear box cover, and a gear box box above the annular gasket is provided with at least two groups of insertion holes, each group of insertion holes is provided with a latch, the latch is inserted through the insertion hole on one side of the gear box box and pressed on the top of the annular gasket, and then passes through the insertion hole on the other side of the gear box box.

[0008] The gear ring described in the utility model is provided with a gear assembly inside, and the gear assembly includes a primary planetary gear, a primary planetary carrier, a secondary planetary gear, and a secondary planetary carrier. The primary planetary gear is connected to the primary planetary carrier, the primary planetary carrier is connected to the secondary planetary gears, the secondary planetary gears are connected to the secondary planetary carrier, and the secondary planetary carrier is connected to the output shaft.

[0009] The output shaft of the utility model is connected with the gear box via a bearing, and the output shaft is fixed inside the gear box via a shaft sleeve.

[0010] The utility model has the advantages of simple structure, high strength, small diameter, convenient installation and disassembly, etc. due to the adoption of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 yes Figure 1 sectional view of .

[0013] Figure 3 yes Figure 1 Schematic diagram of the structure of the toothless box cover.

[0014] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle gear ring.

[0015] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle tooth box. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] As shown in the accompanying drawings, a single-speed gearbox is provided with a gear box 1 and a gear ring 2, characterized in that the bottom of the gear box box 1 is integrally closed and connected via a sealing plate 3, an axial hole 4 is provided in the middle of the sealing plate 3, positioning slots 5 are evenly distributed in the circumferential direction of the sealing plate 3 at the bottom of the gear box box 1, a positioning protrusion 6 is provided on the end face of the gear ring 2 connected to the bottom of the gear box box 1, the gear box box 1 is connected to the gear ring 2 via the positioning protrusion 6 and the positioning slot 5, and a gear box cover 7 is provided on the top of the gear box box 1, and the gear box cover 7 covers the top of the gear box box 1.

[0018] Furthermore, an annular gasket 8 is provided at one end of the gear ring 2 close to the gear box cover 7, and at least two groups of sockets 9 are provided on the gear box box 1 above the annular gasket 8, and a pin 10 is provided in each group of sockets 9. The pin 10 is inserted through the socket 9 on one side of the gear box box 1 and pressed on the top of the annular gasket 8 and then passes through the socket 9 on the other side of the gear box box 1.

[0019] Furthermore, a gear assembly is provided inside the ring gear 2, and the gear assembly includes a primary planetary gear 11, a primary planetary carrier 12, a secondary planetary gear 13, and a secondary planetary carrier 14. The primary planetary gear 11 is connected to the primary planetary carrier 12, the primary planetary carrier 12 is connected to the secondary planetary gear 13, the secondary planetary gear 13 is connected to the secondary planetary carrier 14, and the secondary planetary carrier 14 is connected to the output shaft 15.

[0020] Furthermore, the output shaft 15 is connected to the tooth box 1 via a bearing 16 , and the output shaft 15 is fixed inside the tooth box 1 via a sleeve 17 .

[0021] After the above-mentioned gear assembly is installed, the annular gasket 8 is pressed onto the first-stage planetary gear 11, and then the gear assembly is positioned by inserting the latch 10.

[0022] When the utility model is in use, since the protrusions and grooves between the gear box box 1 and the gear ring 2 are removed, the diameters of the gear box box 1 and the gear ring 2 can be directly reduced, thereby reducing the diameter of the gear box. Since the protrusions and grooves on the inner wall of the gear box box 1 and the outer wall of the gear ring 2 are removed, under the condition of the same outer diameter, the overall structural strength of the bearing 16 box will also be increased. At the same time, the gear assembly is limited by the latch 10 and the annular gasket 8, which is convenient for installation and disassembly. When in use, the power shaft is meshed and connected with the primary planetary gear 11, and the power is transmitted to the secondary planetary carrier 14 through step-by-step transmission. The secondary planetary carrier 14 drives the output shaft 15 to rotate. Due to the adoption of the above-mentioned structure, the utility model has the advantages of simple structure, high strength, small diameter, and convenient installation and disassembly.

Claims

1. A single-speed gearbox, comprising a gear box and a gear ring, characterized in that The bottom of the tooth box box is integrally closed and connected via a sealing plate, an axial hole is provided in the middle of the sealing plate, positioning slots are evenly distributed in the circumferential direction of the sealing plate at the bottom of the tooth box box, a positioning protrusion is provided on the end surface of the gear ring connected to the bottom of the tooth box box, the tooth box box is connected to the gear ring via the positioning protrusion and the slot, a tooth box cover is provided on the top of the tooth box box, and the tooth box cover covers the top of the tooth box box.

2. A single-speed gearbox according to claim 1, characterized in that An annular gasket is provided at one end of the gear ring close to the gear box cover, and at least two groups of jacks are provided on the gear box box above the annular gasket. A latch is provided in each group of jacks. The latch is inserted through the jack on one side of the gear box box and pressed on the top of the annular gasket and then passes through the jack on the other side of the gear box box.

3. A single-speed gearbox according to claim 1, characterized in that A gear assembly is provided inside the gear ring, and the gear assembly includes a primary planetary gear, a primary planetary carrier, a secondary planetary gear, and a secondary planetary carrier. The primary planetary gear is connected to the primary planetary carrier, the primary planetary carrier is connected to the secondary planetary gears, the secondary planetary gears are connected to the secondary planetary carrier, and the secondary planetary carrier is connected to the output shaft.

4. A single-speed gearbox according to claim 3, characterized in that The output shaft is connected to the gear box via a bearing, and the output shaft is fixed inside the gear box via a shaft sleeve.

Images