Gear with eccentric gravity center

Abstract

The utility model relates to the technical field of gears, in particular to a gravity center eccentric gear which comprises a gear body and gear teeth distributed at intervals in the circumferential direction of the gear body, a shaft hole used for installation of a transmission shaft is formed in the center of the gear body, a hub surrounding the shaft hole is formed in the middle of one side of the gear body in a protruding mode, and an offset groove is formed in the end face of at least one side of the gear body. The offset grooves are used for changing the weight ratio uniformity during rotation of the gear, so that the center of the gear deviates from the central axis of the gear during rotation, the rotation gravity center of the gear is changed by directly forming the offset grooves in the gear body, unbalanced force and vibration generated during deflection transmission are counteracted, the gear is convenient to prepare, and materials for manufacturing the gear are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear technical field especially is related to a gravity eccentric gear. BACKGROUND

[0002] Gear is a kind of mechanical transmission element, and the rim has tooth and can continuously mesh transmission movement and power.In prior art, in order to balance the gravity center of gear and the rotation shaft not in the same straight line in eccentric transmission, the form of adding counterweight block on gear is usually used, and the manufacture and installation of counterweight block need additional material and process, which will increase the manufacturing cost of gear, and in the use process, the counterweight block may need regular inspection and maintenance due to loosening, damage or wear, which will also increase the maintenance cost of equipment, and the friction between counterweight block and gear or other components can cause wear, and then affect the reliability and durability of gear. SUMMARY

[0003] The utility model solves the technical problems that: in order to overcome the form of adding counterweight block on gear in prior art, the counterweight block may need regular inspection and maintenance due to loosening, damage or wear, which will also increase the maintenance cost of equipment, and provide a gravity eccentric gear.

[0004] The utility model adopts the technical scheme that: a gravity eccentric gear, including wheel body and the gear tooth that is distributed along the circumferential interval of wheel body, the axle hole for being used for the installation of transmission shaft is set up in the center of wheel body, the wheel hub that is formed around axle hole is projected on the middle of one side of wheel body, the offset slot is set up on at least one side end surface of wheel body, and the offset slot is used for changing the weight proportion uniformity when gear rotates, so that the center of gear when rotating deviates from the central axis, the rotating gravity center of gear is changed by the form of setting up offset slot directly on wheel body, so as to offset the unbalanced force and vibration generated when deflecting transmission, and the gear preparation is convenient, and the material for manufacturing gear is reduced.

[0005] In order to solve the problem of small rotating gravity center offset of single side arrangement, further comprising that the offset slot is set up on both end surfaces of wheel body, and the two offset slots are symmetrically arranged.

[0006] In order to solve the problem of small rotating gravity center offset of single offset slot, further comprising that a plurality of through holes are set up on wheel body, the through hole is communicated with two offset slots, and the through hole is spaced around axle hole.

[0007] Further comprising that the offset slot includes the main part of fan shape and the connecting part of arc shape, the end of main part and the end of connecting part on its side are communicated, the connecting part is located in the inner ring of wheel body, and the inner ring wall surface of offset slot is circumferential surface.

[0008] Further comprising that the central angle of main part is greater than or equal to 180 °, and the central angle of main part is less than or equal to 240 °.

[0009] In order to solve the problem of large eccentric force when deflection transmission, further comprising a plurality of first docking slots and a plurality of second docking slots are arranged on the one end face of the wheel body for mounting the docking column, the first docking slots and the second docking slots are staggered.

[0010] Further comprising the first docking slot groove depth is greater than the second docking slot groove depth.

[0011] Further comprising the first docking slot and the hub are arranged on the same side.

[0012] The beneficial effects of the utility model are: the utility model provides a kind of gravity eccentric gear, the rotating gravity of gear is changed by the form of bias slot being directly set on wheel body, to offset the unbalanced force and vibration when deflection transmission, and make gear preparation convenient, reduce the material of gear manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model is further described below in conjunction with drawings and examples.

[0014] Figure 1 It is the structure schematic diagram of the utility model;

[0015] Figure 2 It is the structure schematic diagram of the utility model Figure 1 The sectional structure schematic diagram of A-A place in the utility model.

[0016] In the drawing: 1, wheel body, 2, gear tooth, 3, shaft hole, 4, wheel hub, 5, bias slot, 51, main part, 52, connecting part, 6, through hole, 7, first docking slot, 8, second docking slot. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with drawings and examples.

[0018] As Figure 1 It is the structure schematic diagram of the utility model, a kind of gravity eccentric gear, including wheel body 1 and the gear tooth 2 along the circumferential interval distribution of wheel body 1, wheel body 1 center is set with the shaft hole 3 for the transmission shaft installation, wheel body 1 one side middle part is protruded and is formed with the wheel hub 4 around shaft hole 3, wheel body 1 at least one side end face is set with bias slot 5, bias slot 5 is used to change the weight proportion uniformity when gear rotates, so that the center of gear rotation deviates from the central axis, the rotating gravity of gear is changed by the form of bias slot 5 being directly set on wheel body 1, to offset the unbalanced force and vibration when deflection transmission, and make gear preparation convenient, reduce the material of gear manufacturing, the design of bias slot 5 can also be used to adjust and compensate the error and deviation of gear in transmission process.

[0019] In another embodiment: two offset grooves 5 are arranged on each end face of the wheel body 1, and the two offset grooves 5 are symmetrically arranged. The design of the two offset grooves 5 can make the gear more balanced in the axial direction, and the two offset grooves 5 can further reduce the counterweight on one side of the gear, so that the rotational center of gravity of the gear deviates from the center more.

[0020] In another embodiment: a plurality of through holes 6 are arranged on the wheel body 1, the through holes 6 are communicated with the two offset grooves 5, the through holes 6 are arranged at intervals around the shaft hole 3, the through holes 6 can further reduce the counterweight on one side of the gear, so that the rotational center of gravity of the gear deviates from the center more. In the present application, four through holes are arranged.

[0021] The offset groove 5 includes a fan-shaped main body part 51 and an arc-shaped connecting part 52. The end of the main body part 51 and the end of the connecting part 52 on the same side are communicated. The connecting part 52 is located in the inner ring of the wheel body 1, and the inner ring wall surface of the offset groove 5 is a circumferential surface. The central angle of the main body part 51 is greater than or equal to 180°, and the central angle of the main body part 51 is less than or equal to 240°.

[0022] A plurality of first butt grooves 7 and a plurality of second butt grooves 8 for mounting the butt columns are arranged on one end face of the wheel body 1. The first butt grooves 7 and the second butt grooves 8 are arranged alternately. In the present application, three first butt grooves 7 and two second butt grooves 8 are arranged on the gear. The groove depth of the first butt groove 7 is greater than the groove depth of the second butt groove 8, and the first butt groove 7 and the hub 4 are arranged on the same side. In actual use, two gears of the present application can be spliced together to form a gear set through the butt columns, so as to cope with more complex situations. The two gears rotate on the same axis. This direct contact form makes the transmission more stable and accurate.

[0023] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A center of gravity eccentric gear, comprising a wheel body (1) and gear teeth (2) distributed along the circumference of the wheel body (1), a shaft hole (3) is formed in the center of the wheel body (1) for mounting a transmission shaft, a wheel hub (4) is formed around the shaft hole (3) on the middle of one side of the wheel body (1), characterized in that, The wheel body (1) is provided with a biasing groove (5) on at least one side end face, the biasing groove (5) is used for changing weight proportion uniformity when the gear rotates, and the center of the gear is offset from the central axis when the gear rotates; The biasing groove (5) comprises a fan-shaped main body part (51) and an arc-shaped connecting part (52), the end part of the main body part (51) and the end part of the connecting part (52) on the side where the main body part (51) is located are communicated, the connecting part (52) is located in the inner ring of the wheel body (1), and the inner ring wall surface of the biasing groove (5) is a circumferential surface.

2. A gravity eccentric gear as claimed in claim 1, wherein: The wheel body (1) is provided with the biasing groove (5) on both end faces, and the two biasing grooves (5) are symmetrically arranged.

3. A gravity eccentric gear as claimed in claim 2, wherein: The wheel body (1) is provided with a plurality of through holes (6), the through holes (6) are communicated with the two biasing grooves (5), and the through holes (6) are distributed at intervals around the shaft hole (3).

4. A gravity eccentric gear as defined in claim 1 wherein: The central angle of the main body part (51) is greater than or equal to 180°, and the central angle of the main body part (51) is less than or equal to 240°.

5. A gravity eccentric gear as defined in claim 1 wherein: The wheel body (1) is provided with a plurality of first butt grooves (7) and a plurality of second butt grooves (8) on one end face, the first butt grooves (7) and the second butt grooves (8) are used for mounting butt columns, and the first butt grooves (7) and the second butt grooves (8) are arranged alternately.

6. A gravity eccentric gear as claimed in claim 5, wherein: The groove depth of the first butt groove (7) is greater than the groove depth of the second butt groove (8).

7. A gravity eccentric gear as claimed in claim 5, wherein: The first butt groove (7) and the hub (4) are arranged on the same side.

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