Precise transmission gear

Abstract

The utility model is applied to the field of gears, in particular to a precise transmission gear which comprises a first gear, a second gear and a limiting piece, the limiting piece is arranged between the first gear and the second gear in a sleeved mode, first through holes are formed in the middle of the first gear and the middle of the second gear respectively, and limiting tables are arranged on the peripheries of the first through holes in a protruding mode. The limiting piece is arranged on one side of the limiting table in a sleeving mode, a ball bearing is arranged between the limiting piece and the limiting table, a connecting end is arranged above the limiting table in a protruding mode, threads are formed in the periphery of the connecting end, and the limiting piece is connected to the two sides of the first gear and the two sides of the second gear in a limiting mode through matching of a nut and the threads of the connecting end. The first gear and the second gear are limited through the limiting piece, and the situation that due to working vibration, the first gear and the second gear move front and back, abrasion of the two sides of teeth is uneven, and consequently the transmission precision of the first gear and the second gear is affected is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gears, in particular to a precision transmission gear. Background Art

[0002] Gears refer to mechanical components with gears on the wheel rim that continuously mesh to transmit motion and power. The application of gears in transmission has appeared very early. Gears and gear products are important basic parts of mechanical equipment. The main transmission components of most mechanical complete sets of equipment are gear transmissions. Gears are mechanical parts with teeth that can mesh with each other. They are extremely widely used in mechanical transmission and the entire mechanical field.

[0003] When the gears are working, the main gear drives the driven gear to work. After the main gear and the driven gear have been running for a period of time, due to wear and vibration, the bearing fixings on the main gear and the driven gear will produce gaps due to the vibration formed during work, causing some unnecessary displacement of the tooth interface, so that the tooth interface of the main gear and the driven gear slides back and forth a certain distance, which may cause uneven wear on both sides of the teeth, thus affecting its precise rotation. Utility Model Content

[0004] The purpose of the utility model is to provide a precision transmission gear to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precision transmission gear, comprising a first gear, a second gear and a limit member, the first gear and the second gear are meshed, the limit member is sleeved between the first gear and the second gear, a first through hole is opened in the middle of the first gear and the second gear, a limit platform is protruded from the outer periphery of the first through hole, the limit member is sleeved on one side of the limit platform, a ball bearing is arranged between the limit member and the limit platform, the limit member is connected to the outer ring of the ball bearing, the limit platform is connected to the inner ring of the ball bearing, a connecting end is protruded above the limit platform, a thread is opened on the outer periphery of the connecting end, and the limit member is limitedly connected to both sides of the first gear and the second gear through the threaded cooperation of a nut and the connecting end.

[0006] Preferably, an outer side wall of the teeth of the first gear is provided with an engagement boss, and an outer side wall of the teeth of the second gear is provided with an engagement groove, and the engagement boss and the engagement groove fit with each other.

[0007] Preferably, the number of the engaging bosses and the number of the engaging grooves are both at least three, and the number of the engaging bosses and the number of the engaging grooves match each other.

[0008] Preferably, the surface of the engaging boss is a convex arc surface, and the surface of the engaging groove is a concave arc surface.

[0009] Preferably, the outer periphery of the teeth of the first gear and the outer periphery of the teeth of the second gear are both coated with an anti-wear coating.

[0010] Preferably, the top of the tooth of the first gear is the first tooth arc surface, and the bottom surface of the tooth groove of the second gear is the second tooth arc surface, the bottom surface of the tooth groove of the first gear is the first tooth arc surface, and the top of the tooth of the second gear is the second tooth arc surface, and the first tooth arc surface and the second tooth arc surface, the second tooth arc surface and the first tooth groove arc surface fit together.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The first gear and the second gear are meshed with each other, and the limit member is sleeved between the first gear and the second gear, and the first through hole is opened in the middle of the first gear and the second gear, and a limit platform is convexly provided on the outer periphery of the first through hole, and the limit member is sleeved on one side of the limit platform, and a ball bearing is arranged between the limit member and the limit platform, and the limit member is connected with the outer ring of the ball bearing, and the limit platform is connected with the inner ring of the ball bearing. A connecting end is convexly provided above the limit platform, and a thread is opened on the outer periphery of the connecting end, and the limit member is connected to both sides of the first gear and the second gear through a nut and a threaded fit of the connecting end. In the gear transmission process, the first gear and the second gear are limited by the limit member, so as to reduce the forward and backward movement of the first gear and the second gear caused by working vibration, resulting in uneven wear on both sides of the teeth, thereby affecting the transmission accuracy of the first gear and the second gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of the first gear of the utility model;

[0015] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0016] Figure 4 This is a schematic diagram of the overall structure of the second gear of the utility model;

[0017] Figure 5 for Figure 4 Amplification of middle B;

[0018] In the figure: a first gear 1, a first tooth groove arc surface 10, a first tooth tooth arc surface 11, an engagement boss 12, a second gear 2, a second tooth groove arc surface 20, a second tooth tooth arc surface 21, an engagement groove 22, a limit member 3, a first through hole 4, a limit platform 5, and a connecting end 6. DETAILED DESCRIPTION

[0019] 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.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or position relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figures 1 to 5As shown, a precision transmission gear of the present embodiment comprises a first gear 1, a second gear 2 and a stopper 3, wherein the first gear 1 and the second gear 2 are meshed, the stopper 3 is sleeved between the first gear 1 and the second gear 2, a first through hole 4 is provided in the middle of the first gear 1 and the second gear 2, a stopper 5 is convexly provided on the outer periphery of the first through hole 4, the stopper 3 is sleeved on one side of the stopper 5, a ball bearing (not shown in the figure) is arranged between the stopper 3 and the stopper 5, the stopper 3 is connected to the outer ring of the ball bearing, the stopper 5 is connected to the inner ring of the ball bearing, a connection end 6 is convexly provided above the stopper 5, a thread is provided on the outer periphery of the connection end 6, the stopper 3 is limitably connected to both sides of the first gear 1 and the second gear 2 through the threaded cooperation of the nut and the connection end 6, during the gear transmission process, the first gear 1 and the second gear 2 are limited by the stopper 3, so that the forward and backward movement of the first gear 1 and the second gear 2 caused by the working vibration is reduced, resulting in uneven wear on both sides of the teeth, thereby affecting the transmission accuracy of the first gear 1 and the second gear 2.

[0023] Furthermore, an engaging boss 12 is convexly provided on the outer wall of the tooth of the first gear 1, and an engaging groove 22 is opened on the outer wall of the tooth of the second gear 2, the engaging boss 12 and the engaging groove 22 fit each other, the number of the engaging bosses 12 and the number of the engaging grooves 22 are both at least three, the number of the engaging bosses 12 and the number of the engaging grooves 22 match each other, the surface of the engaging boss 12 is a convex arc surface, and the surface of the engaging groove 22 is a concave arc surface, so that the engagement of the engaging boss 12 and the engaging groove 22 during the rotation of the utility model is achieved, thereby increasing the contact area between the gears, improving the transmission stability, and increasing the transmission accuracy.

[0024] Furthermore, the outer periphery of the teeth of the first gear 1 and the outer periphery of the teeth of the second gear 2 are coated with an anti-wear coating, which is formed by coating and drying a commercially available anti-wear coating. The anti-wear coating is, for example, polyurethane epoxy wear-resistant paint, which is a high-quality water-based wear-resistant coating with excellent wear resistance, acid and alkali resistance, and chemical corrosion resistance, and is used here.

[0025] Furthermore, the top of the tooth of the first gear 1 is the first tooth arc surface 11, and the bottom surface of the tooth groove of the second gear 2 is the second tooth arc surface 20. The bottom surface of the tooth groove of the first gear 1 is the first tooth arc surface 10, and the top of the tooth of the second gear 2 is the second tooth arc surface 21. The first tooth arc surface 11 and the second tooth groove arc surface 20, the second tooth arc surface 21 and the first tooth groove arc surface 10 fit together. The mutual cooperation between the first tooth arc surface 11 and the second tooth groove arc surface 20, and the mutual cooperation between the second tooth arc surface 21 and the first tooth groove arc surface 10 improve the stability of the transmission of the utility model.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A precision transmission gear, characterized in that: The invention comprises a first gear, a second gear and a limit member, wherein the first gear and the second gear are meshed, the limit member is sleeved between the first gear and the second gear, a first through hole is opened in the middle of the first gear and the second gear, a limit platform is protruded from the outer periphery of the first through hole, the limit member is sleeved on one side of the limit platform, a ball bearing is arranged between the limit member and the limit platform, the limit member is connected to the outer ring of the ball bearing, the limit platform is connected to the inner ring of the ball bearing, a connecting end is protruded above the limit platform, a thread is opened on the outer periphery of the connecting end, and the limit member is limitedly connected to both sides of the first gear and the second gear through the threaded cooperation of a nut and the connecting end.

2. A precision transmission gear according to claim 1, characterized in that: An engagement boss is protruded from the outer side wall of the teeth of the first gear, and an engagement groove is opened on the outer side wall of the teeth of the second gear, and the engagement boss and the engagement groove fit each other.

3. A precision transmission gear according to claim 2, characterized in that: The number of the engagement bosses and the number of the engagement grooves are both at least three, and the number of the engagement bosses and the number of the engagement grooves match each other.

4. A precision transmission gear according to claim 2, characterized in that: The surface of the engagement boss is a convex arc surface, and the surface of the engagement groove is a concave arc surface.

5. The precision transmission gear according to claim 1, characterized in that: The outer periphery of the teeth of the first gear and the outer periphery of the teeth of the second gear are both coated with an anti-wear coating.

6. The precision transmission gear according to claim 1, characterized in that: The top of the tooth of the first gear is the first tooth arc surface, and the bottom surface of the tooth groove of the second gear is the second tooth arc surface. The bottom surface of the tooth groove of the first gear is the first tooth arc surface, and the top of the tooth of the second gear is the second tooth arc surface. The first tooth arc surface and the second tooth groove arc surface, the second tooth arc surface and the first tooth groove arc surface fit together.

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