Mute gear rack

Abstract

The utility model provides a mute gear rack, and belongs to the technical field of transmission parts. The mute gear rack solves the problem that an existing rack is large in transmission noise and comprises two parallel racks arranged in a staggered mode, transmission gears are arranged on the tops of the racks, a mounting gap is formed between the transmission gears, the transmission gears are coaxially arranged and arranged in a staggered tooth mode, and transmission shafts playing a role in connection and transmission are arranged on the transmission gears. A plurality of centrosymmetric transmission keys are arranged on the transmission shaft, a torsion spring is arranged on the installation gap, and the transmission shaft has the advantage of being low in noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission components and relates to a gear rack, in particular to a silent gear rack. Background Art

[0002] The gear rack transmission is based on the meshing principle of gears. When a gear is used in conjunction with a rack, each tooth of the gear will mesh with the corresponding tooth groove of the rack to achieve power transmission. By changing the speed or direction of the gear, the movement speed and direction of the rack can be changed accordingly.

[0003] When the gear and rack are meshed, the gear teeth will deform due to the force. As each gear tooth meshes, the force on the previously meshed gear teeth will be relatively reduced, thus restoring their original shape. This process will bring a tangential acceleration to the gear body. This deformation and recovery process will generate a certain impact force. Summary of the invention

[0004] The utility model aims to provide a flexible, anti-collision, silent gear rack in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a silent gear rack, characterized in that it includes two parallel and staggered racks, a transmission gear is provided on the top of the racks, and an installation gap is provided between the transmission gears, the transmission gears are coaxially arranged and staggered, a transmission shaft for connecting and transmitting is provided on the transmission gears, a plurality of centrally symmetrical transmission keys are provided on the transmission shaft, and a torsion spring is provided on the installation gap.

[0006] In the above-mentioned silent gear rack, a partition plate is provided between the racks, and a guide fillet is provided on the top of the partition plate.

[0007] In the above-mentioned silent gear rack, a positioning frustum is provided on the transmission shaft, and a cover is provided at the end of the transmission shaft, and a positioning bolt for fixing the cover is provided on the transmission shaft.

[0008] In the above-mentioned silent gear rack, the transmission gear is provided with a plurality of centrally symmetrical installation cavities, and a supporting spring is provided in the installation cavity, and a spring positioning column is provided between the installation cavity and the transmission key. In the above-mentioned silent gear rack, the transmission gear is provided with a cover clamping ring.

[0009] Compared with the prior art, the silent gear rack uses a torsion spring to twist the transmission gears on both sides in opposite directions to prevent noise caused by impact due to a gap between the gear and the rack when starting. When the gear rotates and moves, one side is responsible for the main transmission and the other side is responsible for the secondary transmission. The opposite is true when running in the reverse direction, which reduces gear wear and reduces noise through buffering and shock absorption of different gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the silent gear rack.

[0011] Figure 2 It is a structural schematic diagram of the silent gear rack.

[0012] Figure 3 It is a structural schematic diagram of the silent gear rack.

[0013] In the figure, 1. partition plate; 2. transmission gear; 3. transmission shaft; 4. cover; 5. positioning bolt; 6. rack; 7. installation gap; 8. cover clamping ring; 9. guide fillet; 10. positioning cone; 11. support spring; 12. spring positioning column; 13. torsion spring; 14. installation cavity; 15. transmission key. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] like Figure 1 , 2 As shown in Figure 3, the silent gear rack 6 includes two parallel and staggered racks 6, a transmission gear 2 is provided on the top of the racks 6, and a mounting gap 7 is provided between the transmission gears 2. The transmission gears 2 are coaxially arranged and staggered. A transmission shaft 3 for connecting and transmitting is provided on the transmission gear 2, and a plurality of centrally symmetrical transmission keys 15 are provided on the transmission shaft 3. A torsion spring 13 is provided on the mounting gap 7. The torsion spring 13 twists the transmission gear objects on both sides. The gear rack 6 rotates and moves repeatedly, and the gear and the rack 6 run in close contact with each other, thereby reducing the collision between the gear and the rack 6 during the initial operation and reducing the noise.

[0016] Preferably, a partition plate 1 is provided between the racks 6, and a guide fillet 9 is provided on the top of the partition plate 1. The partition plate 1 prevents the gear from deflecting and causing the gear to be misaligned. The guide cylinder does not directly hit the partition plate 1 when the gear rotates, thereby reducing impact and noise.

[0017] Preferably, a positioning cone 10 is provided on the transmission shaft 3, and a cover 4 is provided at the end of the transmission shaft 3. A positioning bolt 5 for fixing the cover 4 is provided on the transmission shaft 3. The positioning bolt 5 limits and fixes the cover 4 to prevent the transmission gear 2 from moving and deflecting, thereby reducing impact and noise.

[0018] Preferably, a plurality of centrally symmetrical installation cavities 14 are provided on the transmission gear 2, and a support spring 11 is provided in the installation cavity 14, and a spring positioning column 12 is provided on the installation cavity 14 and the transmission key 15. The support spring 11 makes the transmission gear 2 first make soft contact with the rack 6 through the squeezing of the support spring 11 when the transmission gear 2 rotates, and the transmission gear 2 on the other side directly contacts for transmission.

[0019] Preferably, a sealing clamping ring 8 is provided on the transmission gear 2 .

[0020] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0021] Although the present invention uses more terms such as partition plate 1, transmission gear 2, transmission shaft 3, cover 4, positioning bolt 5, rack 6, installation gap 7, cover clamping ring 8, guide fillet 9, positioning truncated table 10, support spring 11, spring positioning column 12, torsion spring 13, installation cavity 14, transmission key 15, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A silent gear rack, characterized in that: The invention comprises two parallel and staggered racks (6), each of which is provided with a transmission gear (2) at the top of each of the racks (6), and a mounting gap (7) is provided between the transmission gears (2), the transmission gears (2) are coaxially arranged and staggered, a transmission shaft (3) for connecting and transmitting is provided on the transmission gear (2), a plurality of centrally symmetrical transmission keys (15) are provided on the transmission shaft (3), and a torsion spring (13) is provided on the mounting gap (7).

2. A silent gear rack according to claim 1, characterized in that: A partition plate (1) is provided between the racks (6), and a guide fillet (9) is provided on the top of the partition plate (1).

3. The silent gear rack according to claim 1, characterized in that: The transmission shaft (3) is provided with a positioning truncated table (10), and a cover (4) is provided at the end of the transmission shaft (3). The transmission shaft (3) is provided with a positioning bolt (5) for fixing the cover (4).

4. The silent gear rack according to claim 1, characterized in that: The transmission gear (2) is provided with a plurality of centrally symmetrical installation cavities (14), and a support spring (11) is provided in the installation cavity (14). A spring positioning column (12) is provided between the installation cavity (14) and the transmission key (15).

5. The silent gear rack according to claim 1, characterized in that: The transmission gear (2) is provided with a sealing clamping ring (8).

Images