Speed regulation device with damping structure

Abstract

The utility model discloses a speed regulation device with a damping structure, and relates to the technical field of electric tools. According to the technical key points, the device comprises a speed regulation switch, a speed regulation knob is arranged on the upper side of the speed regulation switch, a speed regulation platform is arranged on one side of the speed regulation switch, a through hole is formed in the speed regulation platform, a knob damping structure is inserted in the through hole, the knob damping structure comprises a spring seat and a compression spring, and a steel ball is arranged on the side, close to the speed regulation platform, of the compression spring; the steel ball is arranged on the compression spring and in the through hole, the highest point of the steel ball is higher than the upper edge of the through hole, a plurality of circular grooves are formed in the lower side of the speed regulating knob, and the steel ball can be clamped in the circular grooves. The utility model has the advantages that: through the arrangement of the speed regulation damping structure, when the speed regulation knob rotates, the firmness of clamping is ensured through the clamping matching of the circular groove and the steel ball; meanwhile, compared with the damping characteristic of a rubber ring, abrasion is reduced, and the phenomenon of gear sliding or gear retreating is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a speed regulating device with a damping structure. Background Art

[0002] The traditional structure is to install an O-ring between the switch and the speed control knob to increase friction. During long-term use, dust and iron filings enter the interior and rub against the O-ring, causing the O-ring to wear, reducing the interference fit between the two, and leading to functional failure.

[0003] For example, a bidirectional damping gear disclosed in publication number CN207005234U uses a gear to drive the shaft core chassis and the shaft core plug shaft to rotate, combined with the viscosity of silicone oil, the silicone oil generates resistance on the shaft core chassis to slow down the rotation speed of the shaft core chassis, thereby achieving bidirectional reduction in the rotation speed of the gear.

[0004] The above-mentioned prior art solution has the following defects: the material properties of silicone oil are used to increase damping, but during long-term use, dust and iron filings will enter the interior, adhere to the silicone oil, wear the rubber ring, and then reduce the interference fit of the rubber ring, resulting in functional failure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a speed regulating device with a damping structure to solve the problems mentioned in the background technology.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0007] A speed regulating device with a damping structure comprises a speed regulating switch, a speed regulating knob is arranged on the upper side of the speed regulating switch, a speed regulating platform is arranged on one side of the speed regulating switch, a through hole is opened on the speed regulating platform, a knob damping structure is inserted into the through hole, the knob damping structure comprises a spring seat and a compression spring, a steel ball is arranged on the compression spring near the side of the speed regulating platform, the steel ball is placed on the compression spring, the steel ball is placed in the through hole and the highest point of the steel ball is higher than the upper edge of the through hole, a plurality of circular grooves are opened on the lower side of the speed regulating knob, and the steel ball can be snapped into the circular grooves.

[0008] In a preferred example, the utility model can be further configured as follows: the diameter of the upper end of the through hole is smaller than the diameter of the lower end, and the inner side wall of the upper end of the through hole is arranged in an arc shape, and the inner side wall fits the steel ball.

[0009] In a preferred example, the utility model can be further configured as follows: a fixing bolt is inserted into the spring seat, and the compression spring is sleeved on the fixing bolt.

[0010] In a preferred example, the utility model can be further configured as follows: the screw of the fixing bolt is arranged in two sections, the diameter of the section close to the nut is larger than the diameter of the section away from the nut, the screw with the larger diameter is threadedly connected to the inner wall of the spring seat, and the compression spring is sleeved on the screw with the smaller diameter.

[0011] In summary, the utility model includes at least one of the following beneficial technical effects:

[0012] 1. By setting up the speed regulating damping structure, when the speed regulating knob is turned, the circular groove and the steel ball are engaged to ensure the firmness of the engagement; at the same time, compared with the damping characteristics of the rubber ring, it reduces wear and tear, and reduces the occurrence of slipping or retarding;

[0013] 2. By setting the set bolt, the compression amount of the compression spring can be adjusted by tightening it, ensuring that the abutting force of the compression spring on the steel ball is large enough, so that the clamping firmness of the steel ball and the circular groove is strong enough; using the set bolt to control the compression amount of the compression spring can also make the compression spring last longer, indirectly increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the internal structure of this technical solution;

[0015] Figure 2 It is a partial structural diagram of this technical solution;

[0016] Figure 3 It is a schematic diagram of the speed regulating damping structure in this technical solution.

[0017] Figure numerals: 1. speed control switch; 2. speed control knob; 3. speed control platform; 4. through hole; 5. knob damping structure; 51. spring seat; 52. compression spring; 6. steel ball; 7. tightening bolt; 8. circular groove. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1-3 , which is a speed regulating device with a damping structure disclosed in the technical solution, includes a speed regulating switch 1, a speed regulating knob 2 is provided on the upper side of the speed regulating switch 1, and the speed regulating switch 1 and the speed regulating knob 2 are sleeved together to form the main structure of the speed regulating device.

[0020] A speed regulating platform 3 is provided on one side of the speed regulating switch 1, and a through hole 4 is provided on the speed regulating platform 3. The speed regulating platform 3 here is a functional name, that is, a through hole 4 is provided on the structure on one side of the speed regulating switch 1. A knob damping structure 5 is inserted into the through hole 4, and the knob damping structure 5 includes a spring seat 51 and a compression spring 52. The spring seat 51 is inserted into the through hole 4, and it is sufficient to ensure that the spring seat 51 does not move or shake, and there is no limitation on the connection method.

[0021] A steel ball 6 is provided on the side of the compression spring 52 close to the speed regulating platform 3. The steel ball 6 is placed on the compression spring 52. The steel ball 6 and the compression spring 52 may be directly connected or not connected. The steel ball 6 is placed in the through hole 4 and the highest point of the steel ball 6 is higher than the upper edge of the through hole 4. Here, the steel ball 6 and the compression spring 52 play a role similar to that of a spring pin.

[0022] The lower side of the speed knob 2 is provided with a plurality of circular grooves 8, which are not shown in the figure. The number of the circular grooves 8 is determined according to the number of gears, and the positions of the circular grooves 8 are also arranged according to the rotation angle of the gears. The steel ball 6 can be snapped into the circular groove 8. The diameter of the upper end of the through hole 4 is smaller than the diameter of the lower end. The size setting here is to prevent the steel ball 6 from slipping out of the through hole 4; and the inner side wall of the upper end of the through hole 4 is set in an arc shape, and the inner side wall fits the steel ball 6.

[0023] A set bolt 7 is inserted into the spring seat 51. The screw of the set bolt is provided in two sections, which are integrally provided. The diameter of the section close to the nut is larger than the diameter of the section away from the nut. The screw with the larger diameter is threadedly connected to the inner side wall of the spring seat, and the compression spring is sleeved on the screw with the smaller diameter.

[0024] The length of the screw with a smaller diameter is smaller than the length of the compression spring 52. By setting the set bolt 7, the compression amount of the compression spring 52 can be adjusted by tightening, ensuring that the abutment force of the compression spring 52 on the steel ball 6 is large enough, so that the clamping firmness of the steel ball 6 and the circular groove 8 is strong enough.

[0025] This technical solution only records the improved related structures. For the related structures not recorded, those in the prior art can be adopted and will not be described in detail here.

[0026] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A speed regulating device with a damping structure, comprising a speed regulating switch (1), wherein a speed regulating knob (2) is provided on the upper side of the speed regulating switch (1), characterized in that: A speed regulating platform (3) is provided on one side of the speed regulating switch (1), a through hole (4) is provided on the speed regulating platform (3), a knob damping structure (5) is inserted into the through hole (4), the knob damping structure (5) comprises a spring seat (51) and a compression spring (52), a steel ball (6) is provided on the compression spring (52) near the side of the speed regulating platform (3), the steel ball (6) is placed on the compression spring (52), the steel ball (6) is placed in the through hole (4) and the highest point of the steel ball (6) is higher than the upper edge of the through hole (4), a plurality of circular grooves (8) are provided on the lower side of the speed regulating knob (2), and the steel ball (6) can be snap-fitted into the circular grooves (8).

2. A speed regulating device with a damping structure according to claim 1, characterized in that: The diameter of the upper end of the through hole (4) is smaller than the diameter of the lower end, and the inner side wall of the upper end of the through hole (4) is arranged in an arc shape, and the inner side wall fits the steel ball (6).

3. A speed regulating device with a damping structure according to claim 1, characterized in that: A fixing bolt (7) is also inserted into the spring seat (51), and the compression spring (52) is sleeved on the fixing bolt (7).

4. A speed regulating device with a damping structure according to claim 3, characterized in that: The screw of the fixing bolt (7) is arranged in two sections, the diameter of the section close to the nut is larger than the diameter of the section away from the nut, the screw with the larger diameter is threadedly connected to the inner side wall of the spring seat (51), and the compression spring (52) is sleeved on the screw with the smaller diameter.

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