CN2321576Y

CN2321576Y - Upper located shifting-block, driving-plate type communicator for electric tool

Info

Publication number: CN2321576Y
Application number: CN 98223144
Authority: CN
Inventors: 杨志斌; 朱海元
Original assignee: TAIHU ELECTRIC-TOOL GROUP Co SUZHOU
Current assignee: TAIHU ELECTRIC-TOOL GROUP Co SUZHOU
Priority date: 1998-01-23
Filing date: 1998-01-23
Publication date: 1999-06-02
Anticipated expiration: 2008-01-23

Abstract

The utility model discloses a catch plate type commutating device for an electric driven tool, which comprises a casing, and a stator and a rotor arranged in the casing, wherein, the rotor is sheathed with a catch plate which is connected with a shifting block that protrudes out of the top of the casing. The catch plate is provided with two electric brushes pressed on the rotors, the rear end face of the catch plate is provided with two cambered wafers, and each cambered wafer contacts a contact fixed in the casing. The two contacts are both connected with a power cord, and the two cambered wafers are respectively connected with two electric brushes through wires. The utility model achieves normal-reverse transfer through changing the current direction of the rotor for an electric machine, which avoids reverse mechanisms using switches to deflect rods. Therefore.,the utility model has the advantages of more reliable performance, more durable performance and safer operation.

Description

Put shifting block dial-type reversing arrangement on the electric tool

The utility model relates to the rotating reversing arrangement of a kind of electric tool, particularly electric drill.

In the prior art, the common usefulness of motor of electric drill be single phase series motivated motor, its rotating commutation can be by changing the sense of current of motor stator, also can realize by the sense of current that changes rotor, common way is to realize commutation by the sense of current that changes stator at present, it mainly relies on the positive and negative driving lever of switch to carry out, as long as the commutation driving lever and the reliable in structure thereof of switch are reasonable, just be easy to realize the rotating commutation, but the durability and the reliability of its rotating commutating structure is unsatisfactory for general switch.

The purpose of this utility model is: provide and put shifting block dial-type reversing arrangement on a kind of electric tool, this device changes the sense of current of rotor by dial, thereby the commutation that realizes motor is rotated.

The technical solution of the utility model is: put shifting block dial-type reversing arrangement on a kind of electric tool, comprise stator and rotor in casing, the casing, be with dial on the described rotor, be connected with shifting block on the dial, shifting block stretches out from the top of casing, dial is provided with two and is pressed in epitrochanterian brush, the rear end face of dial is provided with two arc Contact pieces, all interior with the being fixed on casing contact of each arc Contact piece contacts, described two contacts all are connected with power line, and two arc Contact pieces are connected with lead with two brushes respectively.

The further technical scheme of the utility model is: put shifting block dial-type reversing arrangement on a kind of electric tool, comprise stator and rotor in casing, the casing, be with dial on the described rotor, be connected with shifting block on the dial, shifting block stretches out from the top of casing, dial is provided with two and is pressed in epitrochanterian brush, the rear end face of dial is provided with two arc Contact pieces, all interior with the being fixed on casing contact of each arc Contact piece contacts, described two contacts all are connected with power line, and two arc Contact pieces are connected with lead with two brushes respectively; Described brush rear end is provided with spring, makes brush compress rotor all the time; Described contact is made U-shaped, and has that a pin is long slightly is convenient to wiring, and the centre is provided with spring, makes contact compress arc Contact piece all the time.

The utility model has the advantages that:

1. the utility model is realized the rotating commutation by the sense of current that changes rotor, thereby has avoided using the changement of switch driving lever, its more reliable performance, more durable, safer.

2. the utility model only need be stirred shifting block, just can realize rotating commutation, uses more convenient, operate simplyr, simultaneously, plug-in type is all adopted in being electrically connected of different parts, thereby makes compact conformation, the efficiency of assembling height.

The utility model will be further described below in conjunction with drawings and Examples:

Fig. 1 is a schematic diagram of the present utility model;

Fig. 2 is a structure chart of the present utility model;

Fig. 3 is a left view of the present utility model;

Fig. 4, Fig. 5, Fig. 6 are the structural representation of three kinds of states;

Fig. 7 is the partial enlarged drawing of contact;

Fig. 8 is an electrical schematic diagram of the present utility model.

Wherein: 1. casing; 2. stator; 3. rotor; 4. dial; 5. shifting block; 6. brush; 7. arc Contact piece; 8. contact; 9. power line; 10. lead; 11. spring.

Embodiment: as shown in the figure, put shifting block dial-type reversing arrangement on a kind of electric tool, comprise casing [1], stator [2] and rotor [3] in the casing [1], be with dial [4] on the described rotor [3], be connected with shifting block [5] on the dial [4], shifting block [5] stretches out from the top of casing [1], dial [4] is provided with two brushes [6] that are pressed on the rotor [3], the rear end face of dial [4] is provided with two arc Contact pieces [7], all interior with being fixed on casing [1] contact [8] of each arc Contact piece [7] contacts, described two contacts [8] all are connected with power line [9], and two arc Contact pieces [7] are connected with lead [10] with two brushes [6] respectively; Described brush [6] rear end is provided with spring [11], makes brush [6] compress rotor [3] all the time; Described contact [8] is made U-shaped, and has that a pin is long slightly is convenient to wiring, and the centre is provided with spring [11], makes contact [8] compress arc Contact piece [7] all the time.During work,--------------------stator [2] is got back to switch to another contact [8]--power line [9]--to another arc Contact piece [7] to lead [10] to another brush [6] to rotor [3] to brush [6] to lead [10] to arc Contact piece [7] to contact [8] to power line [9] to electric current by stator [2] through switch, during commutation, shifting block [5] drives dial [4] contacts two contacts [8] respectively with another arc Contact piece [7], thereby changed the flow direction of electric current, reach the purpose of commutation, when stopping using, shifting block [5] is placed in the middle, two contacts [8] rest on the gap location of two arc Contact pieces [7], and entire circuit is off-state.The utility model is realized the rotating commutation by the sense of current that changes rotor, thereby has avoided using the changement of switch driving lever, its more reliable performance, more durable, safer; The utility model only need be stirred shifting block, just can realize rotating commutation, uses more convenient, operate simplyr, simultaneously, plug-in type is all adopted in being electrically connected of different parts, thereby makes compact conformation, the efficiency of assembling height.

Claims

1. put shifting block dial-type reversing arrangement on an electric tool, comprise casing [1], stator [2] and rotor [3] in the casing [1], it is characterized in that: be with dial [4] on the described rotor [3], be connected with shifting block [5] on the dial [4], shifting block [5] stretches out from the top of casing [1], dial [4] is provided with two brushes [6] that are pressed on the rotor [3], the rear end face of dial [4] is provided with two arc Contact pieces [7], all interior with being fixed on casing [1] contact [8] of each arc Contact piece [7] contacts, described two contacts [8] all are connected with power line [9], and two arc Contact pieces [7] are connected with lead [10] with two brushes [6] respectively.

2. put shifting block dial-type reversing arrangement on the electric tool according to claim 1, it is characterized in that: described brush [6] rear end is provided with spring [11], makes brush [6] compress rotor [3] all the time.

3. put shifting block dial-type reversing arrangement on the electric tool according to claim 1, it is characterized in that: described contact [8] is made U-shaped, and has that a pin is long slightly is convenient to wiring, and the centre is provided with spring [11], makes contact [8] compress arc Contact piece [7] all the time.