CN201385303Y

CN201385303Y - Rolling type impact device

Info

Publication number: CN201385303Y
Application number: CN200920001848U
Authority: CN
Inventors: 牛姣娥
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-11
Filing date: 2009-01-11
Publication date: 2010-01-20
Anticipated expiration: 2019-01-11

Abstract

The utility model relates to a rolling type impact device, which is a device used in an impact electric drill or an impact pneumatic drill to enable the main shaft of the impact electric drill or the impact pneumatic drill to generate impact vibration. Rollers and steel balls are installed between the end face of a bearing disc and the end face of a fluted disc. The bearing disc and the fluted disc are respectively matched with the shell and the main shaft of an electric drill in a pressing way or are respectively fixed on the shell and the main shaft of the electric drill by keys. The end face of the fluted disc is of a mouse teeth structure. The end face of the bearing disc is of a circumferential long groove structure or a spherical pit structure. A plurality of rollers and steel balls are evenly placed in the long grooves and the spherical pits on the end face of the bearing disc. When the electric drill is used to drill holes, the main shaft of the electric drill rotates and displacement occurs under the axial force of the drill bit, so the fluted disc on the main shaft of the electric drill is tightly compressed together with the rollers, the steel balls and the bearing disc and relative rotation occurs. Under the action of the relative motion of the mouse teeth and the rollers and the steel balls, the fluted disc drives the main shaft of the electric drill to generate back-and-forth axial impact vibration so as to obtain the effect of impact vibration. The motion among the fluted disc, the bearing disc, the rollers and steel balls belongs to rolling friction. Compared with the sliding friction vibration structure adopted by the original electric drills, the utility model has the advantages that the wear and the heat generated on the mouse teeth are reduced, the moment losses of the electric drill are also reduced, the energy is saved and the service life of the electric drill is prolonged.

Description

The roller percussion mechanism

Affiliated technical field

The utility model relates to and a kind ofly be used for electric impact drill, impact pneumatic drill makes the electric drill main shaft produce the device of impact shock.

Background technology:

The device that produces vibratory impulse at present in electric impact drill and the impact pneumatic drill is up and down, and mouse tooth type fluted disc directly meshes and relatively rotates, thereby make the electric drill main shaft produce the front and back impact shock, this mode is that the mouse tooth of going up lower tooth disk is being subjected to relative high speed rotating under the big pressure, produce strong sliding friction mutually, thereby produce a large amount of heats, tooth wear is fast, the life-span is short, has also directly reduced the moment of torsion of electric drill main shaft simultaneously, has reduced electric drill power relatively

Summary of the invention:

The utility model provides a kind of rolling friction formula vibratory impulse generating means, the technical scheme that adopts is: be used to produce in the middle of the two fluted disc end faces of impact shock function, uniform plurality of rollers or steel ball, one of them fluted disc still is an end face mouse tooth structure, another fluted disc end face is uniform some elongated slots and ball hole circumferentially, it is circular shape that elongated slot and ball are cheated its cross section, identical with roller or steel ball curvature, be used to lay roller or steel ball, the degree of depth in elongated slot and ball hole surpasses roller or steel ball size, plays the effect of roller or ball retainer.This dish is defined as the bearing dish, and rolling member roller and steel ball are installed arrangement mode on the bearing dish have:

In bearing dish end face circumferentially uniform several elongated slots and ball hole, platoon leader's groove is laid roller, and steel ball is laid in adjacent vollyball hole.

In circumferentially uniform some elongated slots of bearing dish end face and ball hole, lay with a kind of single roller and a plurality of steel ball.

In the circumferentially uniform some elongated slots of bearing dish end face, roller or the single or multiple mixed together of steel ball are placed in the same elongated slot.

The interference fit or be keyed on electric drill shell and the main shaft respectively of bearing dish and fluted disc, roller and steel ball are placed in the middle of the two dish end faces, when boring work, because main shaft is stressed to top offset, drive fluted disc to top offset, thereby fluted disc end face mouse tooth is contacted with steel ball with roller, roller contacts with bottom, ball hole with bearing dish end face elongated slot again with steel ball, the electric drill main shaft is in rotation status simultaneously, thereby drive fluted disc rotation, this just makes the roller installed on the fluted disc of rotation and the fixed bearing dish and steel ball and fluted disc end face mouse tooth produce relative rotary motion, because the mouse tooth is concavo-convex tooth shape, thereby fluted disc promptly drives the electric drill main shaft and produces the axial impact vibration, and the relative motion between fluted disc and bearing dish and roller and the steel ball is rolling friction, and its frictional force is littler than force of sliding friction.

The beneficial effects of the utility model are: owing to added rolling member in the middle of bearing dish and fluted disc, electric drill is when work, two fluted discs that produce the impact shock function become mutual rolling friction between rolling member by former strong sliding friction, reduced coefficient of friction, reduced tooth wear, the electric drill life-span is improved, frictional heat reduces simultaneously, the electric drill main-shaft torque increases, and has improved electric drill power relatively, reduces power consumption relatively.

Description of drawings:

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structure chart of first embodiment.

Among Fig. 1: 1 bearing dish, 2 rollers, 3 fluted discs, 4 keys, 5 electric drill main shafts, 6 electric drill shells.

Fig. 2 is the partial sectional view of first embodiment.

Fig. 3 is the structure chart of second embodiment.

Among Fig. 3: 1 bearing dish, 2 rollers, 3 fluted discs, 4 keys, 5 electric drill main shafts, 6 electric drill shells, 7 steel balls

The specific embodiment:

Fig. 1 operation principle: this form rolling impact device is formed (seeing Fig. 1 for details) by 1 bearing dish, 2 rollers, 3 fluted discs, 4 keys, 5 electric drill main shafts, 6 electric drill shells

Fluted disc (3) connects firmly with key (4) and electric drill main shaft (5) interference fit, and bearing dish (1) then presses and is engaged in electric drill shell (6) endoporus, and roller (2) is installed between bearing dish (1) and fluted disc (3) end face.When electric drill is started working, the electric drill main axis rotation also is subjected to drill bit shaft to the effect of F power, under the effect of key (4), electric drill main shaft (5) is with fluted disc (3) rotation, and electric drill main shaft (5) can the axial displacement certain distance under the effect of drill bit axial force F, drives fluted disc (3) axial displacement simultaneously, mouse tooth up to fluted disc (3) end face contacts with roller (2), when roller (2) also contacted with bearing dish (1) end face groove bottom, axially loaded reached balance, no longer displacement of electric drill main shaft (5).Owing to the rotation of fluted disc (3), its end face mouse tooth will be done axial impact shock motion with the effect that is installed in the mutual motion of roller (2) on the bearing dish (1), electric drill main shaft (5), has promptly realized the impact shock function of electric impact drill main shaft (5) again.Because the relative motion between fluted disc (3) and bearing dish (1) and the roller (2) is rolling friction, so the rolling impact apparatus function is achieved.

Fig. 2 operation principle: this form rolling impact device is formed (seeing Fig. 3 for details) by 1 bearing dish, 2 rollers, 3 fluted discs, 4 keys, 5 electric drill main shafts, 6 electric drill shells, 7 steel balls

What this embodiment was different with first embodiment is: mix the combination of having used roller (2) and steel ball (7), single, a plurality of rollers (2) and steel ball (7) can evenly mix arrangement, play load, rolling friction effect.The motion process of this embodiment, operation principle, reach performance, effect is identical with embodiment 1.

Claims

1, a kind of roller percussion mechanism, include the bearing dish, fluted disc, roller, steel ball, the electric drill main shaft, key, the electric drill shell, the bearing dish presses cooperation and is pressed in the electric drill shell, fluted disc presses to cooperate with the electric drill main shaft with key and connects firmly, roller and steel ball are installed on bearing dish end face elongated slot, in the ball hole, and be provided with between the fluted disc of mouse tooth at bearing dish end face and end face, it is characterized in that: in the middle of two dish end faces, uniform plurality of rollers or steel ball, wherein fluted disc is an end face mouse tooth structure, bearing dish end face is uniform some elongated slots and ball hole circumferentially, it is circular shape that elongated slot and ball are cheated its cross section, identical with roller or steel ball curvature, lay roller or steel ball, the degree of depth in elongated slot and ball hole surpasses roller or steel ball size, roller and steel ball have at installation arrangement mode on the bearing dish: in bearing dish end face circumferentially uniform several elongated slots and ball hole, one platoon leader's groove is laid roller, steel ball is laid in adjacent vollyball hole, in circumferentially uniform some elongated slots of bearing dish end face and ball hole, lay with a kind of single roller and a plurality of steel ball, in the circumferentially uniform some elongated slots of bearing dish end face, roller or the single or multiple mixed together of steel ball are placed in the same elongated slot, the interference fit or be keyed on electric drill shell and the main shaft respectively of bearing dish and fluted disc, roller and steel ball are placed in the middle of the two dish end faces.