Combined duplicate gear

Abstract

The utility model relates to the technical field of gears, in particular to a combined duplicate gear. The combined duplicate gear comprises a large gear and a small gear movably installed on the large gear. An inserting groove is formed in the inner wall of the center cavity of the large gear, ball storage cavities communicating with the inserting groove are formed in the positions, on the two sides of the inserting groove, of the large gear, and steel balls are installed in the ball storage cavities; a middle coupling shaft is fixedly embedded in one end of the small gear, and a plurality of annularly-distributed inserting plates are installed on the middle coupling shaft. Compared with a traditional duplicate gear, the combined duplicate gear provided by the utility model has the advantages that the problems that the joint of the small gear and the large gear is twisted off and damaged due to overlarge instant torsion during torsion transmission of the small gear and the large gear are solved, and meanwhile, the small gear and the large gear can be freely disassembled and assembled, so that the combined duplicate gear is convenient to assemble and disassemble. And the pinion and the bull gear can be quickly separated for corresponding replacement, so that the maintenance cost is reduced, and the waste of materials is reduced.

Description

Technical Field

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

[0002] The gear transmission device is a transmission mechanism composed of multiple gears. It uses the meshing principle of gears to convert the speed of the prime mover to the required speed and obtain the corresponding torque. The gear transmission device is an important basic part of mechanical equipment and is irreplaceable in the field of general mechanical equipment. Among them, double gears are mainly used in machine tool reducer spindle boxes, automobile gearboxes and other mechanical fields. With the development of the times, the development of multi-axis CNC machine tools and the prosperity of the automobile industry, double gears will have great development space.

[0003] Most of the existing double gears are integral one-piece molded structures. If a tooth surface is damaged during processing or in the later use of the gear, the entire gear will be scrapped, resulting in a certain amount of material waste and high replacement and repair costs. In addition, since the torque force between the large gear and the small gear is transmitted directly to the small gear, the connection between the large gear and the small gear is prone to breakage and damage due to excessive instantaneous torque.

[0004] Therefore, it is necessary to provide a new combined double gear to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a combined double gear.

[0006] The combined double gear provided by the utility model comprises:

[0007] Large gear, and

[0008] A small gear movably mounted on the large gear;

[0009] The inner wall of the central cavity of the large gear is provided with a plurality of annularly distributed insertion grooves, and the large gears on both sides of the insertion grooves are provided with ball storage cavities connected to the insertion grooves, and each of the ball storage cavities is equipped with a plurality of rolling steel balls;

[0010] One end of the pinion gear is fixedly engaged with a coaxially arranged middle coupling shaft, and a plurality of annularly distributed plug-in plates are installed on the middle coupling shaft, and spherical arc grooves are respectively opened on both side walls of the plug-in plates.

[0011] Preferably, an external connecting ring is fixedly engaged on the central connecting shaft, and a plurality of the plug-in plates are fixedly engaged at an end of the external connecting ring away from the pinion gear, and the plurality of the plug-in plates are distributed axially along the central connecting shaft.

[0012] Preferably, a central coupling shaft corresponding to the end of the plug-in plate is provided with a threaded connection section.

[0013] Preferably, the center coupling shaft on the pinion gear passes through the central cavity of the large gear, and the insertion plates on the pinion gear are respectively inserted into the insertion grooves opened on the large gear, and the spherical arc grooves on both sides of the insertion plates are in contact with the corresponding steel balls respectively.

[0014] Preferably, a threaded fastening nut is sleeved on the threaded connection section of the central coupling shaft.

[0015] Preferably, a backing ring is fixedly engaged with the connecting end of the large gear.

[0016] Preferably, a center hole is formed on the end surface of the pinion gear.

[0017] Compared with the related art, the combined double gear provided by the utility model has the following beneficial effects:

[0018] Compared with the traditional double gears, the utility model reduces the problem of the pinion gear and the large gear being twisted off or damaged at the connection between the pinion gear and the large gear due to the instantaneous excessive torque during torque transmission. At the same time, the pinion gear and the large gear can be freely disassembled and assembled with each other, and the pinion gear and the large gear can be quickly separated for corresponding replacement, which reduces the maintenance cost and reduces the waste of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the structural schematic diagrams of a preferred embodiment of the combined double gear provided by the utility model;

[0020] Figure 2 The second structural schematic diagram of a preferred embodiment of the combined double gear provided by the utility model;

[0021] Figure 3 for Figure 1 Schematic diagram of the explosion structure shown;

[0022] Figure 4 for Figure 1 A schematic cross-sectional view of the large gear shown;

[0023] Figure 5 for Figure 1 Schematic diagram of the structure of the pinion shown.

[0024] Numbers in the figure: 1, large gear; 1a, insertion groove; 1b, ball storage chamber; 11, steel ball; 12, gasket; 2, small gear; 2a, center hole; 21, middle coupling shaft; 22, external ring; 23, insertion plate; 23a, spherical arc groove; 24, threaded connection section; 3, fastening nut. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0027] See also Figures 1 to 5 An embodiment of the utility model provides a combined double gear, which includes: a large gear 1 and a small gear 2.

[0028] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The large gear 1 is movably mounted with a small gear 2, and the inner wall of the central cavity of the large gear 1 is provided with a plurality of annularly distributed insertion grooves 1a, and the large gears 1 on both sides of the insertion grooves 1a are provided with ball storage cavities 1b connected with the insertion grooves 1a, and each of the ball storage cavities 1b is provided with a plurality of rolling steel balls 11, and a gasket 12 is fixedly engaged with the connecting end of the large gear 1, and a coaxially arranged middle coupling shaft 21 is fixedly engaged with one end of the small gear 2, and a plurality of annular steel balls 11 are installed on the middle coupling shaft 21. The distributed plug-in plates 23, specifically, the central coupling shaft 21 is fixedly fitted with an external ring 22, and multiple plug-in plates 23 are fixedly fitted at the end of the external ring 22 away from the pinion 2, and multiple plug-in plates 23 are distributed axially along the central coupling shaft 21, and the two side walls of the plug-in plates 23 are respectively provided with spherical arc grooves 23a, and the central coupling shaft 21 corresponding to the end of the plug-in plates 23 is provided with a threaded connection section 24, and the threaded connection section 24 provided on the central coupling shaft 21 is sleeved with a threaded fastening nut 3;

[0029] The central coupling shaft 21 on the pinion gear 2 passes through the central cavity of the large gear 1, and the insertion plates 23 on the pinion gear 2 are respectively inserted into the insertion grooves 1a opened in the large gear 1, and the spherical arc grooves 23a on both sides of the insertion plates 23 are in contact with the corresponding steel balls 11.

[0030] It should be noted that: when assembling the double gears, the middle coupling shaft 21 on the pinion gear 2 is passed through the central cavity of the large gear 1, and the insertion plates 23 on the pinion gear 2 are respectively inserted into the insertion grooves 1a provided in the large gear 1, until the outer ring 22 on the pinion gear 2 is located in the backing ring 12 in the large gear 1, and then the fastening nut 3 is sleeved on the threaded connection section 24 and screwed and tightened, thereby completing the assembly of the large gear 1 and the pinion gear 2;

[0031] After the pinion 2 is connected to the motor output end or the transmission shaft, the pinion 2 rotates, and then drives the torque on the pinion 2 to be dispersed to each plug-in plate 23. The plug-in plate 23 is in rolling contact with each steel ball 11, so the torque is dispersed to each steel ball 11, and then gathered on the large gear 1. Therefore, when the pinion 2 and the large gear 1 transmit torque, the main form is: pinion 2 (aggregated torque) → plug-in plate 23 (dispersed to linear torque) → steel ball 11 (further dispersed to point torque) → large gear 1 (synthetic aggregated torque);

[0032] When disassembling the double gear, after unscrewing the fastening nut 3, slide the middle coupling shaft 21 on the small gear 2 along the large gear 1, so that the disassembly of the double gear can be completed, which is simple and convenient;

[0033] Compared with the traditional double gears, the combined double gears reduce the problem of the pinion 2 and the large gear 1 being torn off or damaged at the connection due to the instantaneous excessive torque during torque transmission. At the same time, the pinion 2 and the large gear 1 can be freely disassembled and assembled with each other, and the pinion 2 and the large gear 1 can be quickly separated and replaced accordingly, which reduces the maintenance cost and the waste of materials.

[0034] The end surface of the pinion 2 is provided with a center hole 2a for connecting to the output end of the motor or the transmission shaft.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A combined double gear, characterized in that: include: a large gear (1), and A small gear (2) movably mounted on the large gear (1); A plurality of annularly distributed inserting grooves (1a) are provided on the inner wall of the central cavity of the large gear (1), and ball storage cavities (1b) communicating with the inserting grooves (1a) are provided on the large gears (1) on both sides of the inserting grooves (1a), and each of the ball storage cavities (1b) is equipped with a plurality of rolling steel balls (11); One end of the pinion gear (2) is fixedly engaged with a coaxially arranged middle coupling shaft (21), and a plurality of annularly distributed plug-in plates (23) are mounted on the middle coupling shaft (21), and spherical arc grooves (23a) are respectively formed on both side walls of the plug-in plates (23).

2. The combined double gear according to claim 1, characterized in that: An external connecting ring (22) is fixedly engaged on the central connecting shaft (21), a plurality of plug-in plates (23) are fixedly engaged on an end of the external connecting ring (22) away from the pinion (2), and the plurality of plug-in plates (23) are distributed axially along the central connecting shaft (21).

3. The combined double gear according to claim 2, characterized in that: The middle coupling shaft (21) corresponding to the end of the insertion plate (23) is provided with a threaded connection section (24).

4. The combined double gear according to claim 3, characterized in that: The middle coupling shaft (21) on the pinion gear (2) passes through the central cavity of the large gear (1), and the insertion plates (23) on the pinion gear (2) are respectively inserted into the insertion grooves (1a) provided on the large gear (1), and the spherical arc grooves (23a) on both sides of the insertion plates (23) are respectively in contact with the corresponding steel balls (11).

5. The combined double gear according to claim 4, characterized in that: A threaded fastening nut (3) is sleeved on the threaded connection section (24) provided on the middle coupling shaft (21).

6. The combined double gear according to claim 1, characterized in that: A backing ring (12) is fixedly engaged with the connecting end of the large gear (1).

7. The combined double gear according to claim 1, characterized in that: The end surface of the pinion gear (2) is provided with a center hole (2a).

Images