Transmission gear of paper shredder
By setting out flange on the outer ring of the substrate of the shredder gear and extruding the gear profile, combining the regular polygonal shaft hole with the rotating shaft, the problems of high manufacturing cost and high noise in the existing shredder gear are solved, and a lower cost, lighter and more stable operation gear is achieved.
Patent Information
- Application Number
- CN202421406796.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The existing shredder gears have high manufacturing costs and high mass. When used for a long time, the meshing gap between the gears becomes larger, resulting in increased noise.
The outer ring of the substrate is used to set the outer flange and extrude the gear profile on the outer flange. The thickness of the gear is widened by the outer flange, and the circumferential positioning is achieved by combining the regular polygonal shaft hole with the rotation shaft to achieve circumferential positioning, eliminating the axial positioning parts.
Reduces the manufacturing cost of gears, improves weight reduction of mass, reduces wear, extends service life, and reduces noise.
Smart Images
Figure CN222559117U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear processing, in particular to a transmission gear for a paper shredder. Background Art
[0002] In recent years, in order to properly dispose of discarded documents or documents involving company trade secrets, paper shredders have been increasingly widely used in ordinary office places.
[0003] Usually, the shredding process of a shredder is that the motor drives the gear set to rotate, and then transmits the power to the shredder. The sharp teeth or saw-like teeth of the shredder blade bite into the paper and cut it into thin strips or fragments. The current shredder gears are expensive to manufacture and have high quality. The heavier the gears, the easier it is to increase the degree of gear wear. When the meshing gap between the gears increases after long-term use, it will produce harsh noise. Utility Model Content
[0004] The utility model aims to provide a transmission gear for a paper shredder to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above purpose, the utility model provides the following technical solution: a shredder transmission gear, including a substrate, the outer side of the substrate has an outer flange, a gear profile is extruded on the outer facade of the outer flange, and the thickness of the outer flange is greater than the thickness of the substrate.
[0006] By adopting the above technical solution: an outer flange is set on the outer ring of the substrate and the gear profile is extruded on the outer flange, while ordinary gears are milled out using blanks of uniform thickness. By comparing the materials of the substrate and the gear blank and the processing technology of the two, it can be seen that the manufacturing cost of the gears of this solution is lower, and the thickness of the outer flange is greater than the thickness of the substrate. The outer flange is used to widen the thickness of the gear to ensure smooth operation between the gears.
[0007] An axial hole is opened at the center of the substrate.
[0008] By adopting the above technical solution: a hole is opened in the middle of the base material so as to be installed in cooperation with the rotating shaft.
[0009] The shaft hole is a regular polygon.
[0010] By adopting the above technical solution: the axial hole of the substrate is processed into a regular polygon, which can be made into a regular hexagon, a regular octagon or a regular decagon. The shape of the regular polygon can be matched with a rotating shaft of a corresponding shape to achieve circumferential positioning of the gear, eliminating the axial positioning part and making installation faster.
[0011] The axial hole of the substrate is provided with an inner flange, the inner side of the inner flange is adapted to the shape of the axial hole, and the thickness of the inner flange is greater than the thickness of the substrate.
[0012] By adopting the above technical solution: an inner flange is provided on the shaft hole of the base material, and the contact surface between the shaft hole and the rotation is increased by the inner flange, so as to further ensure the stability of the gear operation.
[0013] The outer flange is provided with a solid tooth block, and the gear profile has the outer flange as a tooth root circle.
[0014] By adopting the above technical solution, a gear with a solid tooth block can be obtained by extruding the gear profile by the outer flange, thereby ensuring the use effect of the gear.
[0015] The outer flange is provided with a hollow tooth block, and the connection between the outer flange and the tooth block is disconnected.
[0016] By adopting the above technical solution: using the outer flange directly as the gear profile and setting the gear into a hollow tooth block, the weight of the gear is further reduced and the use effect of the gear is improved.
[0017] Technical effects and advantages of the utility model:
[0018] 1. In this scheme, an outer flange is set on the outer ring of the substrate and the gear profile is extruded on the outer flange, while ordinary gears are milled out using blanks of consistent thickness. By comparing the materials of the substrate and the gear blanks and the processing technology of the two, it can be seen that the gears of this scheme have lower manufacturing costs and lighter weight, and the thickness of the outer flange is greater than the thickness of the substrate. The thickness of the gear is widened by the outer flange, which ensures smooth operation between the gears, reduced wear and long service life.
[0019] 2. In this solution, the axial hole of the substrate is processed into a regular hexagon, a regular octagon or a regular decagon. The shape of the regular polygon can be matched with a rotating shaft of the corresponding shape to achieve circumferential positioning of the gear, eliminating the axial positioning part and making installation faster. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic diagram of the structure of the front side of the transmission gear provided in Example 1 of the present application;
[0021] Figure 2 A schematic diagram of the structure of the back side of the transmission gear provided in Example 1 of the present application;
[0022] Figure 3 A schematic diagram of the structure of the front side of the transmission gear provided in Example 2 of the present application;
[0023] Figure 4 This is a schematic structural diagram of the back side of the transmission gear provided in Example 2 of the present application.
[0024] Figure numerals: 1, substrate; 2, outer flange; 3, tooth block; 4, shaft hole; 5, inner flange. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Example 1
[0027] This embodiment provides Figure 1 and Figure 2 The shredder transmission gear shown includes a substrate 1, an outer side of the substrate 1 having an outer flange 2, an outer facade of the outer flange 2 having a gear profile extruded thereon, the thickness of the outer flange 2 being greater than the thickness of the substrate 1, an outer flange 2 being arranged on the outer ring of the substrate 1 and a gear profile being extruded thereon, since ordinary gears are milled out using blanks of uniform thickness, by comparing the materials of the substrate 1 and the gear blank and the processing techniques of the two, it can be seen that the gear of this scheme has a lower manufacturing cost, and the thickness of the outer flange 2 is greater than the thickness of the substrate 1, and the thickness of the gear is widened by using the outer flange 2 to ensure smooth operation between the gears, and since the weight is lighter than that of ordinary gears, wear is reduced and the service life is longer.
[0028] The manufacturing process of the gear of this embodiment is as follows: the substrate 1 is placed on a cutting machine to cut out a disc shape, and then the disc-shaped substrate 1 is placed on the base of the stamping die. The axial hole 4 in the center of the substrate 1 can be used for positioning, and then the outer edge of the substrate 1 is turned into a full edge at one time by using the die, and then the flanged edge after stamping is placed on the extruded gear profile. The finished product is as follows Figure 1 The formed gear has a solid tooth block 3 on its outer flange, and the gear profile uses the outer flange as the tooth root circle. The gear profile can be extruded through the outer flange to obtain a gear with a solid tooth block 3, thereby ensuring the use effect of the gear.
[0029] Example 2
[0030] like Figure 3 and Figure 4 As shown, the gear of this embodiment adopts the method of making the flange into the gear profile. In addition, in this embodiment, the shaft hole 4 of the substrate 1 also has an inner flange 5, the inner side of the inner flange 5 is adapted to the shape of the shaft hole 4, and the thickness of the inner flange 5 is greater than the thickness of the substrate 1.
[0031] Further, in accordance with the above-mentioned embodiments 1 and 2, an axial hole 4 is provided at the center of the substrate 1. In this embodiment, the axial hole 4 of the substrate 1 can be processed into a regular hexagon, a regular octagon or a regular decagon. The shape of the regular polygon can be matched with a rotating shaft of the corresponding shape to realize the circumferential positioning of the gear, eliminating the axial positioning part and making the installation faster.
[0032] Since the inner flange 5 is arranged on the shaft hole 4 of the base material 1, the contact surface between the shaft hole 4 and the rotating body is increased by the inner flange 5, so as to further ensure the stability of the gear operation.
[0033] The manufacturing process of the gear of this embodiment is as follows: the substrate 1 is placed on a cutting machine, and a die matching the gear profile is used on the cutting machine to cut out the gear-shaped substrate 1, and then the gear-shaped substrate 1 is placed on a stamping die, and the axial hole 4 in the center of the substrate 1 can be used for positioning, and then the outer edge of the substrate 1 is turned into a full edge at one time by using the stamping die, and the finished product is as follows: Figure 3 shown.
[0034] Specifically, the gear has a hollow tooth block 3 on the outer flange, the connection between the outer flange and the tooth block 3 is disconnected, the outer flange is directly used as the gear profile, and the tooth block 3 is set to a hollow structure, which further reduces the weight of the gear and improves the use effect of the gear.
[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A transmission gear for a paper shredder, characterized in that: The invention comprises a substrate (1), wherein the outer side of the substrate (1) has an outer flange (2), a gear profile is extruded on the outer facade of the outer flange (2), and the thickness of the outer flange (2) is greater than the thickness of the substrate (1).
2. A paper shredder transmission gear as claimed in claim 1, characterized in that: An axial hole (4) is provided at the center of the substrate (1).
3. A paper shredder transmission gear as claimed in claim 2, characterized in that: The shaft hole (4) is a regular polygon.
4. A paper shredder transmission gear as claimed in claim 1, 2 or 3, characterized in that: The axial hole (4) of the substrate (1) is provided with an inner flange (5), the inner side of the inner flange (5) is adapted to the shape of the axial hole (4), and the thickness of the inner flange (5) is greater than the thickness of the substrate (1).
5. A paper shredder transmission gear as claimed in claim 1, characterized in that: The outer flange (2) is provided with a solid tooth block (3), and the gear profile has the outer flange as a tooth root circle.
6. A paper shredder transmission gear as claimed in claim 1, characterized in that: The outer flange is provided with a hollow tooth block (3), and the connection between the outer flange (2) and the tooth block (3) is disconnected.