CN113431873A

CN113431873A - Bidirectional self-locking speed reducing structure

Info

Publication number: CN113431873A
Application number: CN202110707206.8A
Authority: CN
Inventors: 余李方
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-09-24
Anticipated expiration: 2041-06-24
Also published as: CN113431873B

Abstract

The invention discloses a bidirectional self-locking speed reducing structure, which relates to the technical field of speed reducing structures and comprises a fixed gear base, a fixed gear, a driven gear connecting shaft, a driven gear, a driving gear shaft base, a driving gear shaft and a driving gear, wherein the fixed gear is fixed with a first end of the fixed gear base, the driven gear is fixed with a first end of the driven gear connecting shaft, a first end of the driving gear shaft is fixed with the driving gear shaft base, and the driving gear is rotatably sleeved on the periphery of a second end of the driving gear shaft. When the driving gear rotates around the fixed gear for one circle, the fixed gear does not rotate, and the driven gear also rotates along with the driving gear under the action of the driving gear due to the fact that the number of teeth of the fixed gear is different from that of the driven gear; when the driving gear stops rotating, the fixed gear forms self-locking to the driving gear, and further forms self-locking to the driven gear.

Description

Bidirectional self-locking speed reducing structure

Technical Field

The invention relates to the technical field of speed reducing structures, in particular to a bidirectional self-locking speed reducing structure.

Background

Taking a string adjusting system of a musical instrument as an example, most of traditional string adjusting mechanisms adopt a wooden shaft with a taper and are arranged in holes with the same taper on the stringed musical instrument, and in order to limit the rotation of the wooden shaft caused by the tension generated by tightening strings, a user must strongly press the tapered wooden shaft so that the friction force between the tapered shaft and the tapered hole is greater than the tension force of the strings; if the wooden shaft is rotated to adjust the string, the force larger than the friction force between the conical shaft and the conical hole is required to be generated, so that the string is broken due to the excessive force or the force is not large enough, the string cannot be adjusted by rotating the wooden shaft, and even the wooden shaft is loosened due to the change of temperature and humidity (thermal expansion and cold contraction), the tension of the string is instantaneously zeroed (commonly called string running). Due to the limitations of the existing structures, string tuning is a laborious and cumbersome procedure for adults, and it is difficult for minors with limited strength. What is needed is a structure that is simple to operate, convenient to use, fine-adjustable, and capable of being bidirectionally self-locked, and the structure can be used for string adjustment and can be applied to other devices with similar requirements.

Disclosure of Invention

Therefore, the invention provides a bidirectional self-locking speed reducing structure to solve the problems in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

a bidirectional self-locking speed reduction structure comprises a fixed gear base, a fixed gear, a driven gear connecting shaft, a driven gear, a driving gear shaft base, a driving gear shaft and a driving gear, wherein the fixed gear is fixed to a first end of the fixed gear base, the driven gear is fixed to a first end of the driven gear connecting shaft, a first end of the driving gear shaft is fixed to the driving gear shaft base, and the driving gear is rotatably sleeved on the periphery of a second end of the driving gear shaft;

the axis of the driven gear is coaxial with the axis of the fixed gear, the driving gear shaft base can rotate around the axis of the fixed gear, the number of teeth of the fixed gear is different from that of the driven gear, a first section of the driving gear is meshed with the driven gear, a second section of the driving gear is meshed with the fixed gear, and when the driving gear shaft base rotates around the axis of the fixed gear, the driving gear rotates around the fixed gear and the driven gear.

Furthermore, the driving gears and the driving gear shafts are provided in a plurality, the driving gears and the driving gear shafts are arranged in a one-to-one correspondence manner, and the driving gears are uniformly distributed along the circumferential direction of the fixed gear.

Furthermore, the bidirectional self-locking speed reduction structure further comprises a driving gear limiting piece, the driving gear limiting piece is rotatably arranged at the end of the fixed gear base, and the second section of the driving gear is rotatably connected with the driving gear limiting piece.

Further, two-way auto-lock reduction gear still includes gear storehouse shell, the first end of gear storehouse shell with the driving gear axle base is fixed, the second end rotationally the cover of gear storehouse shell is established week side of fixed gear base, gear storehouse shell will fixed gear, driven gear, driving gear axle and the spacing piece of driving gear are located in the gear storehouse shell.

Furthermore, two-way auto-lock deceleration structure still includes fixed sleeving, fixed sleeving's first end is worn to locate in the second end of fixed gear base and can not rotate relatively, driving gear axle rotationally wears to locate in the fixed sleeving, just driving gear axle's first end pass behind the fixed gear with driven gear fixed connection.

Further, two-way auto-lock deceleration structure still includes toper carrier pipe, toper carrier pipe rotationally the cover is located the week side of driving gear axle, fixed sleeving's second end is worn to locate in the first end of toper carrier pipe and can not rotate.

Further, two-way auto-lock deceleration structure still includes passive rotatory sleeve pipe, passive rotatory sleeve pipe box is located the week side and the synchronous rotation of driving gear axle, the first end of passive rotatory sleeve pipe is worn to locate in the second end of toper carrier pipe and can rotate relatively.

Furthermore, the bidirectional self-locking speed reducing structure further comprises a combined screw rod, and the combined screw rod is screwed at the second end of the driving gear shaft.

Furthermore, the bidirectional self-locking speed reducing structure further comprises a combined nut, and the first end of the driving gear shaft penetrates through the driving gear shaft base and then is screwed with the combined nut.

The invention has the following advantages:

when the driving gear rotates around the fixed gear for one circle, the fixed gear does not rotate, and the driven gear also rotates along with the driving gear under the action of the driving gear due to the fact that the number of teeth of the fixed gear is different from that of the driven gear; when the driving gear stops rotating, the fixed gear forms self-locking to the driving gear, and further forms self-locking to the driven gear.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.

Fig. 1 is an exploded view of a bidirectional self-locking deceleration structure according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of an upper portion of a bidirectional self-locking deceleration structure according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a middle portion of a bidirectional self-locking deceleration structure according to an embodiment of the present invention;

fig. 4 is a sectional view (with section lines omitted) of the lower portion of the bidirectional self-locking deceleration structure provided by the embodiment of the invention.

In the figure: 1-fixed gear, 2-fixed gear base, 3-driven gear, 4-driving gear, 5-driving gear limiting piece, 6-driving gear shaft, 7-driving gear shaft base, 8-gear bin shell, 9-fixed sleeve, 10-conical carrier tube, 11-driven gear connecting shaft, 12-concave flat position, 13-positioning pin, 14-driven rotating sleeve, 15-third groove, 16-combined screw rod, 17-fourth groove, 18-threading hole, 19-screw rod, 20-combined nut, 21-first groove, 22-positioning hole and 23-second groove.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

In the present embodiment, the "upper right" direction in fig. 1 is the "upper" direction in the text. As shown in fig. 1-4, a bidirectional self-locking speed reduction structure includes a fixed gear base 2, a fixed gear 1, a driven gear connecting shaft 11, a driven gear 3, a driving gear shaft base 7, a driving gear shaft 6 and a driving gear 4. The fixed gear 1 is fixed with the upper end of a fixed gear base 2, the fixed gear base 2 is provided with a through hole penetrating through the upper surface and the lower surface, and the fixed gear 1 is also provided with a through hole penetrating through the upper surface and the lower surface; optionally, the fixed gear 1 may adopt a form of combining a hollow gear with a circular tube, a gear may be welded and fixed at the upper end of the circular tube, or a gear may be processed at the upper end of the circular tube, the fixed gear base 2 is provided with a through hole penetrating through the upper and lower surfaces, the lower end of the circular tube is inserted into the through hole of the fixed gear base 2, and the circular tube and the fixed gear base 2 are fixed by a pin shaft or a screw, so that the two cannot rotate; optionally, the fixed gear 1 is in the form of an external gear ring and is directly welded to the upper end of the fixed gear base 2. The upper end of a driven gear connecting shaft 11 penetrates out of the through hole of the fixed gear base 2, the lower end of the driven gear connecting shaft 11 is positioned below the fixed gear base 2, a driven gear 3 is fixed at the upper end of the driven gear connecting shaft 11, the axis of the driven gear 3 is coaxial with the axis of the fixed gear 1, and the number of teeth and the modulus of the fixed gear 1 are different from those of the driven gear 3; generally, the driven gear 3 is sleeved on the periphery of the driven gear connecting shaft 11; optionally, the driven gear 3 is connected with the driven gear connecting shaft 11 through a key, so that the driven gear and the driven gear connecting shaft do not rotate relatively; optionally, the driven gear connecting shaft 11 is provided with a concave flat position 12, and a convex flat position adapted to the flat position is arranged at the central hole of the driven gear 3, so that the driven gear connecting shaft and the driven gear do not rotate relatively; optionally, the upper end of the driven gear connecting shaft 11 passes through the driving gear shaft base 7, the driven gear 3 is located below the driving gear shaft base 7, at this time, a screw rod 19 is arranged at the upper end of the driven gear connecting shaft 11, and the screw rod 19 is screwed with a combined nut 20. Driving gear axle base 7 can rotate around the axis of fixed gear 1, driving gear axle base 7 is equipped with and wears the shaft hole, it is equipped with a plurality ofly to wear the shaft hole, a plurality ofly wear the shaft hole along the circumference evenly distributed by driving gear 4's axis, the upper end of driving gear axle 6 is fixed in driving gear axle base 7 wears to establish a driving gear axle 6 in every wears the shaft hole, a driving gear 4 is rotationally established to the lower extreme of every driving gear axle 6 cover, the upper segment and the driven gear 3 meshing of driving gear 4, the hypomere and the fixed gear 1 meshing of driving gear 4, when driving gear axle base 7 rotates around the axis of fixed gear 1, driving gear 4 rotates around fixed gear 1 and driven gear 3. The gears in this embodiment may be straight or skewed teeth.

When the driving gear 4 rotates around the fixed gear 1 for one circle, the fixed gear 1 does not rotate, and the driven gear 3 also rotates along with the driving gear 4 under the action of the driving gear 4 because the teeth numbers of the fixed gear 1 and the driven gear 3 are different; for example, the number of teeth of the fixed gear 1 is 24, the number of teeth of the driven gear 3 is 26, and when the driving gear 4 rotates 360 degrees around the fixed gear 1, the driven gear 3 rotates only 12.5/360 degrees, and the reduction ratio is 1: 12.5. When the driving gear 4 stops rotating, the fixed gear 1 forms self-locking on the driving gear 4, and further forms self-locking on the driven gear 3. Taking a peg of an instrument as an example, a housing (corresponding to a gear housing 8 later) is a carrier of a driving gear 4, the driving gear 4 is engaged with a fixed gear 1 and a driven gear 3 simultaneously, when the housing is rotated manually, the driving gear 4 acts on the fixed gear 1 and the driven gear 3 simultaneously, and since the number of teeth (24 teeth) of the fixed gear 1 is different from the number of teeth (26 teeth) of the driven gear 3, the driving gear 4 rotates 360 degrees around the fixed gear 1, the driven gear 3(3) rotates only 2 teeth, namely 12.5/360 degrees, and the reduction ratio is 1: 12.5. Because the driven gear 3 is connected with the tuning peg through the driven rotary sleeve 14 in the following, the fine tuning of the string can be achieved. And because the fixed gear 1 is not rotated, and the driving gear 4 is a transmission bridge of the driven gear 3, although the strings have larger tension, the rebounding of the driven gear 3 can be prevented under the action of the fixed gear 1, and the driven gear 3, the rotating sleeve and the peg can be forced to rotate only through the forward and reverse rotation of the driving gear 4 connected with the shell, so that the self-locking function of the peg is realized.

In order to ensure that the driving gear 4 is better meshed with the fixed gear 1 and avoid the driving gear shaft 6 from deviating, the bidirectional self-locking speed reducing structure further comprises a driving gear limiting piece 5, and the driving gear limiting piece 5 is rotatably arranged at the end part of the fixed gear base 2; generally, the rotation axis of the driving gear limiting sheet 5 is collinear with the axis of the fixed gear 1; optionally, a boss is arranged at the end part of the fixed gear base 2, and the driving gear limiting piece 5 is rotatably sleeved on the boss; optionally, a convex edge is arranged at a position on the outer periphery of the fixed gear base 2, and the lower end face of the driving gear limiting piece 5 is abutted to the convex edge. The lower section of the driving gear 4 is rotatably connected with a driving gear limiting plate 5; optionally, the lower extreme of driving gear 4 is equipped with the pivot that the diameter is less, and driving gear spacing piece 5 is equipped with the counter bore with pivot looks adaptation, and the axis of counter bore and the axis collineation of wearing the shaft hole, the pivot is worn to establish in the counter bore, makes the axis of driving gear 4, driving gear shaft 6 restricted on wearing the shaft hole and the axis that the counter bore belongs to.

In this embodiment, the bidirectional self-locking speed reduction structure further includes a gear bin housing 8, the upper end of the gear bin housing 8 is fixed with the driving gear shaft base 7 in a buckling manner, the lower end of the gear bin housing 8 is rotatably sleeved on the periphery of the fixed gear base 2, and the fixed gear 1, the driven gear 3, the driving gear 4, the driving gear shaft 6 and the driving gear limiting sheet 5 are located in the gear bin housing 8 by the gear bin housing 8; optionally, the lower end of the gear housing 8 is provided with a large through hole, the large through hole is sleeved on the outer periphery of the fixed gear base 2, and the diameter of the large through hole is smaller than that of the convex edge, so that the convex edge can prevent the gear housing 8 from moving upwards.

In a specific embodiment of this embodiment, the bidirectional self-locking deceleration structure is particularly applied to string adjustment, and therefore, the bidirectional self-locking deceleration structure further comprises a fixed sleeve 9, a conical carrier tube 10 and a passive rotating sleeve 14. The upper end of the fixed sleeve 9 is arranged in the lower end of the fixed gear base 2 in a penetrating way and can not rotate relatively; optionally, the fixed sleeve 9 and the fixed gear base 2 are fixed through a pin shaft or a screw, so that relative rotation between the fixed sleeve and the fixed gear base is avoided; optionally, the upper end of the fixed sleeve 9 is provided with a first groove 21, a projection matched with the first groove 21 is arranged in the fixed gear base 2, and the projection is clamped with the first groove 21, so that the fixed sleeve 9 and the fixed gear base 2 cannot rotate relatively. The driving gear shaft 6 is rotatably arranged in the fixed sleeve 9 in a penetrating way, and the upper end of the driving gear shaft 6 penetrates through the fixed gear 1 and then is fixedly connected with the driven gear 3. The conical carrier tube 10 is rotatably sleeved on the periphery of the driving gear shaft 6, and the lower end of the fixed sleeve 9 is arranged in the upper end of the conical carrier tube 10 in a penetrating manner and cannot rotate; optionally, the lower end of the fixing sleeve 9 is provided with a second groove 23, a pin hole corresponding to the second groove 23 is arranged on the periphery of the conical carrier tube 10, and a pin is arranged in the pin hole and penetrates through the second groove 23, so that the fixing sleeve 9 and the conical carrier tube 10 cannot rotate relatively. The driven rotating sleeve 14 is sleeved on the periphery of the driving gear shaft 6 and rotates synchronously; optionally, a third groove 15 is disposed at the upper end of the driven rotating sleeve 14, a positioning hole 22 is disposed at a position of the driving gear shaft 6 opposite to the third groove 15, the positioning pin 13 is inserted into the positioning hole 22, and two ends of the positioning pin 13 are located in the third groove 15, so that the driven rotating sleeve 14 and the driving gear shaft 6 rotate synchronously. The upper end of the passive rotary sleeve 14 is disposed through the lower end of the conical carrier tube 10 and is rotatable relative thereto. Optionally, the lower end of the driving gear shaft 6 is located in the driven rotating sleeve 14, the lower end of the driving gear shaft 6 is provided with a fourth groove 17, an internal thread is arranged in the fourth groove 17, a threading hole 18 is arranged on the driven rotating sleeve 14 at a position corresponding to the fourth groove 17, a combined screw 16 is screwed in the fourth groove 17, and when the combined type string stringing device is used, strings are threaded through the threading hole 18 or the combined type string stringing device is connected with a string shaft.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A bidirectional self-locking speed reduction structure is characterized by comprising a fixed gear base, a fixed gear, a driven gear connecting shaft, a driven gear, a driving gear shaft base, a driving gear shaft and a driving gear, wherein the fixed gear is fixed with a first end of the fixed gear base;

2. The bi-directional self-locking deceleration structure as recited in claim 1, wherein a plurality of driving gears are provided, the plurality of driving gears are provided in one-to-one correspondence with the plurality of driving gear shafts, and the plurality of driving gears are uniformly distributed along a circumferential direction of the fixed gear.

3. The bi-directional self-locking deceleration structure as recited in claim 1 or 2, further comprising a driving gear spacing piece rotatably disposed at an end of the fixed gear base, wherein the second section of the driving gear is rotatably connected to the driving gear spacing piece.

4. The bi-directional self-locking deceleration structure of claim 3, further comprising a gear housing, wherein a first end of the gear housing is fixed to the driving gear base, a second end of the gear housing is rotatably sleeved on the periphery of the fixed gear base, and the gear housing locates the fixed gear, the driven gear, the driving gear shaft and the driving gear spacing piece inside the gear housing.

5. The bi-directional self-locking deceleration structure as recited in claim 1, further comprising a fixed sleeve, wherein a first end of the fixed sleeve is disposed through the second end of the fixed gear base and is non-rotatable, the driving gear shaft is rotatably disposed through the fixed sleeve, and a first end of the driving gear shaft passes through the fixed gear and is fixedly connected to the driven gear.

6. The bi-directional self-locking deceleration structure of claim 5, further comprising a conical carrier tube rotatably sleeved around the driving gear shaft, wherein the second end of the fixing sleeve is inserted into the first end of the conical carrier tube and is non-rotatable.

7. The bi-directional self-locking deceleration structure of claim 6, further comprising a driven rotating sleeve sleeved on the periphery of the driving gear shaft and rotating synchronously, wherein a first end of the driven rotating sleeve is inserted into the second end of the conical carrier tube and can rotate relatively.

8. The bi-directional self-locking deceleration structure of claim 7, further comprising a combination screw screwed to the second end of the driving gear shaft.

9. The bi-directional self-locking deceleration structure of claim 8, further comprising a combination nut, wherein the first end of the driving gear shaft passes through the driving gear shaft base and then is screwed with the combination nut.