CN202271149U

CN202271149U - Pressing clamp of double helical gear

Info

Publication number: CN202271149U
Application number: CN 201120394443
Authority: CN
Inventors: 赵龙振; 冯长秀; 张德军; 程红星; 闫朝友
Original assignee: Henan Diesel Engine Industry Co Ltd
Current assignee: Henan Diesel Engine Industry Co Ltd
Priority date: 2011-10-17
Filing date: 2011-10-17
Publication date: 2012-06-13
Anticipated expiration: 2021-10-17

Abstract

The utility model belongs to the technical field of pressing split double gears, and provides a press clamp of a double helical gear. The pressing clamp comprises a clamp body (1), elastic pins (6), a support carrier I, a support carrier II and a compacting mechanism (12), wherein three elastic pins (6) are uniformly arranged in the circular groove of the clamp body (1) along the circumferential direction, the support carrier I for positioning teeth marked with 0 (11) of an inner gear and a support carrier II for positioning teeth marked with 0 (10) of an outer gear are provided, the support carrier I comprises a support body I(2), a latch I (3) and a locking screw I (15), the support carrier II comprises a support body II(8), a latch II (9) and a locking screw II (7), and the compacting mechanism (12) for compacting the outer gear is arranged above the clamp body (1). The pressing clamp satisfies the requirement for pressing a double helical gear with large interference and is high in efficiency and precision.

Description

A kind of pressing clamp of duplex helical gear

Technical field

The utility model belongs to split type duplicate gear technology of pressure mounting field in the transmission system, relates generally to a kind of pressing clamp of duplex helical gear.

Background technology

Duplex helical gear in the transmission system is normally press-fited by an inner ring gear and an outer ring gear and forms, and the outer ring gear is a left-hand helical gear, and the inner ring gear is the dextrorotation helical gear.Press-fiting of duplex helical gear mainly reaches specification requirement: 1. two gear Internal and external cycles press-fit matching allowance; 2. two gears have been done " 0 " mark tooth angle to relative positional accuracy.

Existing duplex helical gear press-fits three kinds of technical methods below the common employing:

Method 1: inner ring gear cooling before press-fiting, the heating of outer ring gear.The outer ring gear is placed on the pressing clamp, with cylindrical and lower surface location, fixedly has the tooth of " 0 " mark with latch, realize outer ring gear six point locations, behind the clamping cylindrical, pressing clamp and outer ring gear are put into stove in the lump and are heated; The inner ring gear is put into liquid nitrogen to be cooled off; Taking out inside and outside circle gear simultaneously press-fits rapidly; The endoporus of inner ring gear is located with axle; Be pressed into the outer ring gear vertically downward along axis direction; Fit fully until internal ring gear wheel circular bead surface and gear upper surface, outer ring, have the tooth of " 0 " mark by fixing its of latch when the internal ring gear wheel is pressed into, guarantee the angle relative positional accuracy of outer ring gear and inner ring gear.This method outer ring gear and pressing clamp heat in the lump, and during production in enormous quantities, the pressing clamp demand is bigger, and with the gear repeated heating, precise decreasing is fast, and it is extremely low to cause press-fiting production efficiency and product percent of pass.

Method 2: inner ring gear room temperature, the heating of outer ring gear before press-fiting.The outer ring gear adopts the locate mode identical with method 1, heats in the lump with pressing clamp; The endoporus of inner ring gear is located with axle, is pressed into the outer ring gear vertically downward along axis direction, and process of press in is with method 1.This method is only to the heating of outer ring gear, and part heating back aperture swell increment is less relatively, and the part magnitude of interference is difficult for assembling successfully when big, and the method is only applicable to the less duplicate gear of the magnitude of interference and press-fits;

Method 3: inside and outside circle gear is room temperature before press-fiting.The outer ring gear adopts the locate mode identical with method 1; Be put on the forcing press in the lump with anchor clamps and press-fit; The inner ring gear with " 0 " mark tooth of latch insertion inner ring gear, guarantees the angle relative positional accuracy of the relative outer ring of inner ring gear gear by axle location and guiding; On press equipment, directly press-fit the inner ring gear, press-fit the back and adopt laser weld that the Internal and external cycle gear is reinforced the connection.This method at room temperature directly press-fits gear, is only applicable to that the magnitude of interference is little, low the press-fiting of two gear relative positional accuracy requirements, and needs to be equipped with special-purpose press-loading device, press-fits the inside and outside circle gear in back and adopts laser weld to reinforce, and interchangeability is poor, and maintenance cost is higher.

The utility model content

The purpose of the utility model is the pressing clamp that proposes a kind of duplex helical gear, and it is big to make it satisfy the magnitude of interference, and what the high duplex helical gear of required precision was produced in batches press-fits.

The utility model is taked following technical scheme for accomplishing the foregoing invention purpose:

A kind of pressing clamp of duplex helical gear, described pressing clamp comprise clamp body, resilient key, prop carrier I, prop carrier II and hold-down mechanism; Described clamp body is the cuboid that the center has circular groove, and the diameter of circular groove that clamp body has, the degree of depth and requiredly press-fit the boss diameter of inner ring gear, highly kiss is joined; In the circular groove that clamp body had, be uniformly distributed with three resilient keys along the circumference, its upper end of resilient key with back-moving spring is positioned at the circular groove of clamp body; When not being pressed into the inner ring gear, the endoporus of outer ring gear is positioned, when being pressed into the inner ring gear, be contracted in the installing hole of clamp body; Be provided with and be used for prop carrier I that inner ring gear band " 0 " mark tooth is positioned and the prop carrier II that is used for outer ring gear band " 0 " mark tooth is positioned; Described prop carrier I comprises supporter I, latch I and lock-screw I; Described latch I is passed the supporter I and is had two thread forms identical with the tooth gaps of inner ring gear in latch I termination; Described prop carrier II comprises supporter II, latch II and lock-screw II; Described latch II pass the supporter II and have in latch II termination one with the identical thread form in tooth-formation of gear gap, outer ring; Described supporter I and supporter II are fixed on the upper surface of clamp body; Above clamp body, has the hold-down mechanism that the outer ring gear is compressed; Described hold-down mechanism is two covers, and symmetry is positioned at the top of outer ring gear.

The pressing clamp of a kind of duplex helical gear that the utility model proposes can satisfy press-fiting of big inner ring gear of the magnitude of interference and outer ring gear, and have high efficiency, high-precision characteristics.Pressing clamp is worked at normal temperatures; Avoided reducing the generation of the situation of scrapping too early because of frequent heating causes precision; Adopt the shape thread form latch identical that inner ring gear, outer ring gear are positioned, have the positioning accuracy height, press-fit the high characteristics of qualification rate with tooth gaps; Telescopic three resilient keys can move down with being pressed into synchronously of inner ring gear, promptly to outer ring, lower end bore location, do not interfere being pressed into of upper end inner ring gear again.

Description of drawings

Fig. 1 is the front view of utility model pressing clamp.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the structural representation of resilient key in the utility model pressing clamp.

Among the figure: 1, clamp body, 2, the supporter I, 3, the latch I, 4, the outer ring gear; 5, inner ring gear, 6, resilient key, 7, the lock-screw II, 8, the supporter II; 9, latch II, 10, outer ring gear band " 0 " mark tooth, 11, inner ring gear band " 0 " mark tooth, 12, hold-down mechanism; 13, back-moving spring, 14, screw, 15, the lock-screw I.

The specific embodiment

In conjunction with accompanying drawing and specific embodiment the utility model is explained:

Like Fig. 1, shown in Figure 2, a kind of pressing clamp of duplex helical gear comprises clamp body 1, prop carrier and hold-down mechanism 12 and resilient key 6; Described clamp body 1 has the cuboid of circular groove for the center, and 1 of clamp body have circular groove diameter, the degree of depth and requiredly press-fit the boss diameter of inner ring gear 5, highly kiss is joined; In the circular groove that clamp body 1 is had, be uniformly distributed with three resilient keys 6 along the circumference.In conjunction with Fig. 3, described resilient key 6 is the cylinder that upper and lower side all has round boss, is pin in cylindrical upper surface; At the last back-moving spring 13 that is with; Its lower end of cylinder that upper and lower side all has round boss has internal thread hole, is fixed on through screw 14 in the resilient key installing hole of clamp body 1; When not being pressed into inner ring gear 5; The pin of resilient key upper end positions the endoporus of outer ring gear 4; When being pressed into inner ring gear 5, along with continuing of downward pressure, inner ring gear 5 lower surfaces contact with the pin of resilient key 6 upper ends; Spring 13 compressive deformations, resilient key 6 is contracted in the installing hole of clamp body 1.Be provided with and be used for the prop carrier that band " 0 " the mark tooth 10 to outer ring gear 4 positions; Described prop carrier II comprises supporter II 8, latch II 9 and lock-screw II 7; Described latch II (9) pass supporter II (8) and have in latch II (9) termination one with the identical thread form in tooth-formation of gear gap, outer ring; Be provided with and be used for the prop carrier I that band " 0 " the mark tooth 11 to inner ring gear 5 positions, described prop carrier I comprises supporter I 2, latch I 3 and lock-screw I 15; Described latch I (3) is passed supporter I (2) and is had two identical thread forms of tooth gaps with inner ring gear (5) in latch I (3) termination; Supporter I 2, supporter II 8 are fixed on the upper surface of clamp body 1, on supporter I 2, supporter II 8, all are fixedly connected with fairlead, and latch can slide in fairlead and rotate; Latch I (3), latch II (9) are inserted band " 0 " mark tooth 11, outer ring gear 4 band " 0 " mark teeth 10 location that make inner ring gear 5 in the tooth gaps of being with " 0 " mark tooth on inner ring gear 5, the outer ring gear 4 respectively when press-fiting, and are locked by the latch behind lock-screw I 15,7 pairs of location of lock-screw II respectively; On clamp body 1, have the hold-down mechanism 12 that outer ring gear 4 is compressed, described hold-down mechanism adopts common structural in the prior art, is made up of pressing plate, studs, spring, packing ring and nut; Described hold-down mechanism 12 is two covers, and symmetry is positioned at the top of outer ring gear 4, is used for behind outer ring gear location, compressing the upper surface of outer ring gear, so that being pressed into of inner ring gear 5.

A kind of pressing clamp that utilizes above-mentioned duplex helical gear press-fits the method for duplex helical gear; Inner ring gear 5 is put into liquid nitrogen cooling 10 minutes; Outer ring gear 4 is put into stove and is heated to 200 ℃ of insulations 2 hours; Take out outer ring gear 4 and be placed on clamp body 1 upper surface, and by the endoporus location of 6 pairs of outer ring gears 4 of three resilient keys, the termination that latch II 9 is had a thread form is inserted in the tooth gaps of two bands " 0 " mark tooth 10 and is located; Screw in lock-screw II 7 locking latch II 9, compress outer ring gear 4 with two groups of hold-down mechanisms 12 then; Take out inner ring gear 5 again; The boss cylindrical of inner ring gear 5 inserts in the endoporus of outer ring gear 4 fast, and tooth 11 alignment pins I 3 backs that make inner ring gear band " 0 " mark guarantee that to pressing down the thread form of latch I 3 front ends blocks inner ring gear band " 0 " mark tooth 11; Screw in lock-screw I 15 locking latch I 3; Along with continuing of downward pressure, the lower surface of inner ring gear 5 contacts with resilient key 6, spring 13 compressive deformations; Resilient key 6 moves down with inner ring gear 5 synchronously, fits tightly up to the faying face of inner ring gear 5 with outer ring gear 4.

Claims

1. the pressing clamp of a duplex helical gear, it is characterized in that: described pressing clamp comprises clamp body (1), resilient key (6), prop carrier I, prop carrier II and hold-down mechanism (12); Described clamp body (1) has the cuboid of circular groove for the center, and the diameter of circular groove that clamp body has, the degree of depth and requiredly press-fit the boss diameter of inner ring gear (5), highly kiss is joined; In the circular groove that clamp body (1) is had, be uniformly distributed with three resilient keys (6) along the circumference, its upper end of resilient key with back-moving spring (13) is positioned at the circular groove of clamp body; Be provided with the prop carrier II that the prop carrier I that is used for inner ring gear band " 0 " mark tooth (11) is positioned and band " 0 " the mark tooth (10) that is used for the outer ring gear position; Described prop carrier I comprises supporter I (2), latch I (3) and lock-screw I (15); Described latch I (3) is passed supporter I (2) and is had two identical thread forms of tooth gaps with inner ring gear (5) in latch I (3) termination; Described prop carrier II comprises supporter II (8), latch II (9) and lock-screw II (7); Described latch II (9) pass supporter II (8) and have in latch II (9) termination one with the identical thread form in tooth-formation of gear gap, outer ring; Described supporter I (2), supporter II (8) are fixed on the upper surface of clamp body (1); Has the hold-down mechanism (12) that outer ring gear (4) is compressed in the top of clamp body (1); Described hold-down mechanism (12) is two covers, and symmetry is positioned at the top of outer ring gear (4).