RU2609523C1 - Tooth-wheel - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: invention relates to machine engineering and can be used in the low-speed gears with coarse-pitch tooth-wheels lubricated with liquid lubricants by immersion. A tooth-wheel contains a body, a pair of circumferential linings fixed on the body ends theouter diameter of which is equal to the circumferential diameter of the tooth ring vertices, and a tooth ring made of hollow teeth. Each tooth is made of a pair of curved plates forming the lateral teeth surfaces and fixed between the inner ends of the annular linings. There is a through window in the plate forming an outrunning lateral surface during the wheel rotation at its junction with the wheel body, whose width is equal to the plate width, and the window height is equal to the outside section of the tooth surface, calculated for this wheel. The second plate is provided with the L-shaped element, which width is equal to the width of this plate. One flange of the element is fixed to this plate in the area of the circumference of the tooth ring vertices to form a gap between the element and the first plate. Another flange is oriented toward the wheel body to form a gap against it, and the magnitude of this gap is commensurable with the first plate window height.

EFFECT: tooth-wheel manufacturing technology which improves the quality of its lubrication.

2 dwg

Description

The invention relates to mechanical engineering, in particular to machine parts, and can be used in low-speed gears with large-modular gears, lubricated by liquid lubricants by immersion.

A known design of a gear wheel containing a body, a ring gear with teeth and a pair of ring plates mounted on the ends of the teeth and body parts adjacent to the ring gear - see, for example, US patent No. 3861231, cl. 74-410, 1976

The disadvantage of this gear wheel is that the liquid lubricant captured by the teeth of the wheel from the oil bath - when they are immersed in this bath - in the process of turning the wheel in the direction of the engagement area of the pair of gears in need of lubrication, drains from the surfaces of the gear teeth, and by the time these teeth come into engagement with the teeth of the pair of wheels, they may no longer carry enough lubricant for the proper lubrication of the friction zone of the mating teeth of the pair of wheels. This intensifies the wear process of the teeth of the twin wheels.

As a prototype taken gear design according to the patent for the invention of the Russian Federation No. 2536286, class. F16H 55/10, F16H 55/17, F16H 57/04, publ. December 20, 2014, bull. Number 35. The essence of the invention lies in the fact that the wheel contains a body, a pair of ring pads mounted on the ends of the wheel body, the outer diameter of which is equal to the diameter of the circumference of the tops of the ring gear, and a ring gear made of hollow teeth, each of which consists of a pair of plates bent along the profile of the lateral surfaces calculated for a given tooth wheel and fixed between the end plates on the wheel body. Through holes are made in the plate, which is leading when the wheel rotates, in the area where it adjoins the wheel body, through holes are made along the width of the ring gear. The second plate is equipped with a L-shaped element with a width equal to the width of this plate, one shelf of the element is fixed on this plate in the region of the circumference of the tops of the ring gear to form a gap between the element and the first plate, and the other shelf is oriented towards the wheel body, with the formation of a gap regarding him. The tooth cavities, when the teeth are immersed in the bath’s liquid lubricant, capture this lubricant - through the gaps of the tooth tip region - and, when the wheel rotates, transfer it to the engagement zone, when approaching which the lubricant from the tooth cavities extends outward to the lubricated tooth friction surfaces.

The disadvantage of the prototype is that the set of cross-sections of through holes in the oncoming plates forming the lateral surfaces of the teeth may not be sufficient for optimal emptying of the tooth cavities from the lubricant located in them (since the holes are made in part of the width of the plates). In addition, with a small size of the length of the shelves of the L-shaped elements oriented towards the wheel body, which, together with the inner surfaces of the lagging plates forming the side surfaces of the teeth and the inner surfaces of the annular linings, form the cavity of the teeth, the volume of these cavities and, therefore, the volume the lubricant captured by these cavities may not be sufficient for good lubrication of the friction surfaces of the teeth.

The invention solves the problem of improving the quality of lubrication.

For this, the gear wheel contains a body, a pair of annular linings mounted on the ends of the body, the outer diameter of which is equal to the diameter of the circumference of the vertices of the ring gear, and a ring gear made of hollow teeth. Each tooth is made of a pair of curved plates forming the lateral surfaces of the teeth and fixed between the inner ends of the annular overlays. In the plate, which forms the leading surface, when the wheel rotates, at the side adjacent to the wheel body, a through window is made, the width of which is equal to the width of this plate, and the height of the window is equal to the height of the inoperative portion of the tooth lateral surface calculated for this wheel. The gap between the flange of the L-shaped element and the wheel body is commensurate with the height of the window in the first plate.

The invention is illustrated in the drawing, which shows: a fragment of the gear wheel - end view (Fig. 1) and the same fragment is a side view (Fig. 2).

The drawing shows: the body 1 of the gear; ring linings 2 and 3; circle of 4 tops of a gear rim; inner circumference of 5 ring pads; circumference of 6 bases of the ring gear; plates 7 and 10; the outer surfaces of the plates (7 and 10) - the side surfaces of the 8 and 11 teeth; through window 9; L-shaped element 12; shelves 13 and 15 of the element (12); cavity 16 tooth; the value c of the non-working portion of the lateral surface of the calculated tooth of the wheel; clearance 14; gap size Δ (14); the size h of the gap between the L-shaped element (12) and the body (1) of the wheel; direction of rotation ω of the wheel.

The gear wheel contains a body 1, a pair of annular linings 2 and 3, mounted on the ends of the wheel body, the outer diameter of which is equal to the diameter of the circumference of the tops 4 of the gear ring, and the diameter of their inner circumference is 5 less than the diameter of the circle 6 of the base of the ring gear, and the ring gear, made of hollow teeth. Each tooth is made of a pair of curved plates forming the lateral surfaces of the teeth and fixed between the inner ends of the annular overlays (2 and 3). In one plate - 7, which forms the leading - when the wheel (ω) rotates - the lateral surface of the 8 tooth, at the site of its abutment to the body (1) of the wheel, a through window 9 is made; the width of this window is equal to the width of the plate (7) - the width of the gear ring of the wheel; and the height of this window is equal to the height of the non-working area from the side surface (8) of the tooth, calculated for this wheel. The second plate - 10, forming a lagging side surface 11 of the tooth, is equipped with a L-shaped element 12 with a width equal to the width of this plate. One shelf - 13 of this element is fixed on the plate 10 in the region of the circumference of the tops 4 of the ring gear, with the formation of a gap 14 of size Δ between the L-shaped element and the plate 7. And the other shelf - 15 of this element is oriented towards the body of 1 wheel, with the formation of a gap h relative to the body, and the size of this gap is comparable with the height c of the window 9 in the first plate (7).

When the wheel is in gear, the teeth of the wheel are periodically immersed in the liquid lubricant of the oil bath. At the same time, this lubricant, through the gaps 14 in the region of the tops of the teeth, is poured into the cavities of the 16 teeth, filling them. With further rotation of the wheel, the teeth move up, pass the upper point on the circumference of the wheel and approach the gearing area of the pair of wheels, which needs to be lubricated, from above. When moving the teeth and in the process of turning them upside down, lubricant from the cavities of the 16 teeth flows out (through the through window 9). In this case, the lubricant enters the bathtubs formed by the lateral surfaces 8 and 11 of adjacent teeth and the inner ends of the annular linings 2 and 3 (in the areas of the tooth cavities). In this case, the lagging lateral surfaces of the teeth 11, the outer surfaces of the plates 10, which are working and participate in meshing with the teeth of the twin wheels, are lubricated.

Compared with the prototype, the proposed design of the gear wheel allows you to form sections of the volume of the cavities of the teeth filled with lubricant sufficient to capture them with a sufficient amount of lubricant, which is used to lubricate the friction surfaces of the teeth. In addition, the implementation of through pouring windows (across the entire width of the teeth) instead of a set of through holes that serve to empty the tooth cavities filled with lubricant, allows the tooth cavities to be emptied in a timely manner, before the teeth approach the area of engagement with the teeth of the pair of gears. And the execution of the height of these windows, equal to the height of non-working sections of the tooth flanks, takes into account the fact that these sections do not participate in the engagement and do not overlap with the teeth of the twin wheels.

Claims (1)

A gear wheel, mainly a large-modular, non-reversible low-speed gear, lubricated by immersion in liquid lubricant, containing a body, a pair of annular linings mounted on the ends of the body, the outer diameter of which is equal to the diameter of the circumference of the tops of the ring gear, and a ring gear made of hollow teeth, each tooth made of a pair of curved plates forming the lateral surfaces of the teeth and fixed between the inner ends of the annular overlays, in a curved plate forming ahead of rotation at least one through hole is made along the width of the curved plate, the second curved plate is provided with a L-shaped element, a width equal to the width of the second curved plate, one shelf of the L-shaped element fixed on the second curved plate in the region of the circumference of the tops of the gear rim, with the formation of a gap between the L-shaped element and the first curved plate, and its other shelf is oriented towards the body of the gear , with the formation of a gap relative to it, characterized in that in the first curved plate there is one through window, the width of which is equal to the width of the first curved plate, the height of this window is equal to the height of the inoperative portion of the tooth flank calculated for a given gear wheel, and the gap between the shelf L-shaped element and the body of the gear wheel is commensurate with the height of the through window in the first curved plate.

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