CN2693425Y

CN2693425Y - Electric wrench for large scale vehicle

Info

Publication number: CN2693425Y
Application number: CN 200420019562
Authority: CN
Inventors: 徐长福
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-15
Filing date: 2004-01-15
Publication date: 2005-04-20
Anticipated expiration: 2014-01-15

Abstract

The utility model relates to an electric wrench, in particular to a hand-held electric tool used for the disassembly and assembly of bolts and nuts, when the tyre of a large truck, a passenger car and a packaging car is replaced. The utility model which uses the power of the vehicle has simple structure and light weight; besides, the utility model which is safely and easily used is an electric wrench for the large vehicle, and can be operated by one person. The housing of the electric wrench comprises a direct current miniature electric motor, a clutch assembly, an inertia wheel combination, a shaft bearing sheathed with a shockproof sleeve, a force moment output shaft combination, a switch which can control the reverse and the positive rotation of the electric motor and a power supply line provided with a plug for a cigarette lighter. The instantaneous stroke load current of the electric motor basically equals to, or is smaller than the operating current of the rotation of the flywheel driven by the electric motor, when the clutch assembly adopted by the utility model rotates in a high speed. The utility model is the device which can effectively prevent the ascension of the locked-rotor current of the electric motor, and the locked-rotor current is far smaller than the 15A safety current of the vehicle. The requirement to the material, the heat treatment and the fabrication technology of the spare parts which are mutually impacted is not necessarily high, when the inertia wheel combination adopted outputs the large force moment.

Description

A kind of large-scale electric spanner for vehicle

Affiliated field

The utility model relates to a kind of electric wrench, especially for change high capacity waggon, passenger vehicle, when tire is changed in the collection entrucking, the electric hand tool that dismounting nut, bolt are used is a kind of use automobile power source, can be with the electric wrench of car.

Background technology

As everyone knows, large-scale load-carrying vehicle, as lorry, motor bus, the nut of collection entrucking, bolt is essential with very big torsional forces ability dismounting, if re-type, generally be with the very big nut demountor of moment in Auto repair shop, or the dismounting of aerodynamic wind big gun, normally with the power supply of 220V or 380V, their volume is bigger for this class instrument, and can only operate in fixed place, can not carry with car, if this class vehicle on the way must re-type the time, then be the thing that allows drivers bother, especially the less and female drivers of some muscle power are undertaken to do what is apparently beyond one's ability especially, even the bigger drivers of muscle power also need could dismounting with very long boosting-rod.At present, discloseder electric wrench technology are a kind of tires that can only be applicable to dilly, and this wrench torque is limited to present technology and can not does the moment of output very big, and this spanner is then powerless for large-scale load-carrying vehicle re-type.

Summary of the invention

The purpose of this utility model provides a kind of power supply that utilizes automobile itself, and its output torque can be enough to the tire of the large-scale load-carrying vehicle of dismounting, the motor rotation blockage electric current can be identical with operating current, the electric current of stall can be below automotive safety electric current 15A, volume is little, in light weight, only need a people with regard to exercisable large-scale electric spanner for vehicle.

The technical scheme in the invention for solving the technical problem is:

Technical scheme 1 a: direct-flow micromachine is arranged in the motor slot of left shell, clutch pack of the output coupled of motor, a flying wheel combination is arranged in the centre of left shell, the rear end of flying wheel combination has an envelope the bearing of bump protection ring, bearing is installed in the rear bearing slot of left shell, a moment output shaft combination is housed in the front aperture of flying wheel combination, in the switch groove at the rear portion of left shell, the switch that can control the motor direction of rotation is housed, with a power line that has cigarette lighter plug with switch, motor connects, the fuse that a 12A is arranged in the described cigarette lighter plug, when with motor, the clutch combination, the flying wheel combination, the combination of moment output shaft, switch, after the power line that has a cigarette lighter plug all inserts separately in the notch, the right casing that closes is fixed left and right sides shell with screw.

Technical scheme 2: the clutch combination in the described technical scheme 1 is by a take-up housing, two brake pads, two small extension springs, four pins are formed, described brake pad is inlaid with wear-resisting leather or asbestos packing sheet on its arc limit, two brake pads by two small extension springs with the slotted eye kink on the projection of take-up housing, the two ends of small extension spring are fixed on two brake pads by four pins respectively, and take-up housing has a flat round hole and the fastening connection of motor shaft.

Technical scheme 3: the flying wheel combination in the described technical scheme 1, it is the flywheel that has certain mass by, a bump slide block, two extension springs, four little axles, one group of bearing, a swivel nut, a stage clip, a steel ball, a rear bearing, a shock-absorbing sleeve, a friction sleeve is formed, in the middle of the described flywheel is a rectangular through-hole, the bump slide block is contained in the rectangular through-hole, there are two through holes on two limits of bump slide block, are two extension springs in the through hole, and four the little two ends of passing two extension springs respectively are separately fixed on flywheel and the bump slide block, on the limit of rectangular through-hole a screw is arranged, a swivel nut and a stage clip are arranged in the screw, and a steel ball, steel ball have certain pressure to the pit of bump slide block side under the effect of stage clip, the front end of flywheel has one group of bearing to be fastened in its circular hole, a rear bearing is housed on the rear end axle of flywheel, and there is a shock-absorbing sleeve outer ring of rear bearing, is a two keyway in the rear end axis hole of flywheel, there is a friction sleeve in two keyways, to connect, also has a push rod to be fixed therein in the hole of described friction sleeve with the interference fits form.

Technical scheme 4: the moment output shaft combination in the described technical scheme 1 is by a main shaft, a dial, several steel balls, a steel bushing is formed, and the front end of described main shaft is a square tenon, there is a circular hole at the middle part of side's tenon, a stage clip and a steel ball are arranged in the circular hole, and the middle part of main shaft is a hexagon prism, presses in the hexagon prism to join a dial, oiliness bearing is the front portion that is enclosed within main shaft, and the elliptical aperture that dial, bump slide block are passed in the rear portion of main shaft inserts in the bearing group in the flying wheel combination.

The technical program operation principle is: the clutch pack of motor output end is when rotating at a high speed, brake pad flies away to circumferencial direction under action of centrifugal force, and to connect in the friction sleeve in certain normal pressure and the flying wheel combination, drive the rotation of flywheel one superhigh speed thus, when the rotating speed of flywheel reaches setting value, the bump slide block at flywheel middle part overcomes the pulling force of extension spring under action of centrifugal force, and overcome stage clip in the swivel nut, the resistance of steel ball in the pit of bump slide block side, speed with moment flies out to the flywheel circumferencial direction, its position of flying away from is spacing after being collided by elliptical aperture in the middle of the bump slide block and main shaft, the end of clashing into slide block this moment rotates at a high speed to dial with flywheel clashes into, because the inertia of the radius of gyration of dial and flywheel is big than square in this programme, Gu the bump moment of output is also just bigger, behind bump slide block bump dial, the rotating speed of flywheel is by the high speed bust and be tending towards zero-speed, brake pad, the bump slide block is owing to there not being action of centrifugal force resetted by the effect of extension spring, operating current during the impacting load current and be substantially equal to the motor rotary flywheel of motor moment this moment, even also be slightly less than operating current, its reason is after brake pad breaks away from friction sleeve, motor is in load condition down, when under the motor during load condition, rotation at a high speed plays rotation with the clutch pack crossed belt again, another so occurs and impacts circulation.

The beneficial effects of the utility model are: adopted the technical program can avoid that mutually the power of bump is excessive because of part, and to the material of mutual bump part, heat treatment, processing technology has excessive demand, and the moments of inertia of the radius of gyration of dial, flywheel is bigger, the output torque that obtains is also very big, and clutch pack is a device that effectively anti-motor rotation blockage electric current rises, and its locked rotor current can be much smaller than the safe current 15A of automobile.

Below in conjunction with drawings and Examples to being described further.

Fig. 1 is the complete machine structure figure that the utility model is opened right casing.

Fig. 2 is the structure chart of clutch combination.

Fig. 3 is the structure chart of flying wheel combination.

Fig. 4 is the structure chart of moment output shaft combination.

Work schematic diagram when Fig. 5 is bump slide block and dial collision.

Among Fig. 1,1. motor, 2. clutch combination, 3. flying wheel combination, 4. moment output shaft combination, 5. cigarette lighter plug, 6. switch, 7. left shell,

Among Fig. 2,8. take-up housing, 9. pin, 10. brake pad, 11. small extension springs, 12. leathers (or asbestos packing sheet),

Among Fig. 3,13. flywheels, 14. bearing group, 15. push rods, 16. rear bearings, 17. shock-absorbing sleeves, 18. friction sleeves, 19. extension springs, 20. little axles, 21. steel balls, 22. stage clips, 23. swivel nuts, 24. bump slide blocks,

Among Fig. 4,25. stage clips, 26. steel balls, 27. main shafts, 28. oiliness bearings, 29. steel balls, 30. steel bushings, 31. dials.

The specific embodiment

A direct-flow micromachine [1] is arranged in the motor slot of left shell [7], a clutch pack of the output coupled of motor [1] [2], a flying wheel combination [3] is arranged in the centre of left shell [7], the rear end of flying wheel combination [3] has an envelope the rear bearing of shock-absorbing sleeve [17] [16], rear bearing [16] is installed in the rear bearing slot of left shell [7], a moment output shaft combination [4] is housed in the front aperture of flying wheel combination [3], the switch [6] that can control the motor direction of rotation is housed in the switch groove at left shell [7] rear portion, with a power line that has cigarette lighter plug [5] with switch [6], motor [1] connects, the fuse that a 12A is arranged in the described cigarette lighter plug [5], when with motor [1], clutch combination [2], flying wheel combination [3], moment output shaft combination [4], switch [6], the power line that has a cigarette lighter plug [5] is screwed behind the right casing that closes after all inserting separately in the notch.

Clutch combination [2] is by a take-up housing [8], two brake pads [10], two small extension springs [11], four pins [9] are formed, described brake pad [10], on its arc limit, be inlaid with wear-resisting leather [12] (or asbestos packing sheet), two brake pads [10] by two small extension springs [11] with the slotted eye kink on the projection of take-up housing [8], the two ends of small extension spring [11] are fixed on two brake pads [10] by four pins [9] respectively, and the fastening connection of output shaft of a flat round hole and motor [1] is arranged on the take-up housing [8].

Flying wheel combination [3] is the flywheel [13] that has certain mass by, a bump slide block [24], two extension springs [19], four little axles [20], a bearing group [14], a swivel nut [23], a stage clip [22], a steel ball [21], a rear bearing [16], a shock-absorbing sleeve [17], a friction sleeve [18] is formed, in the middle of the described flywheel [13] is a rectangular through-hole, bump slide block [24] is contained in the rectangular through-hole, there are two through holes on two limits of bump slide block [24], two extension springs [19] are arranged in the through hole, the two ends that four little axles [20] pass two extension springs [19] respectively are separately fixed on flywheel [13] and the bump slide block [24], on the limit of rectangular through-hole a screw is arranged, a swivel nut [23] and a stage clip [22] are arranged in the screw, a steel ball [21], steel ball [21] has certain pressure to the pit of bump slide block [24] side under the effect of stage clip [22], the front end of flywheel [13] has a bearing group [14] to be fastened in its circular hole, a rear bearing [16] is housed on the rear end axle of flywheel [13], there is a shock-absorbing sleeve [17] outer ring of rear bearing [16], be a two keyway in the rear end axis hole of flywheel [13], have a friction sleeve [18] and it to connect, have a push rod [15] to be fixed therein in the hole of described friction sleeve [18] with the interference fits form.

Moment output shaft combination [4] is by a main shaft [27], a dial [31], several steel balls [29], a steel bushing [30] is formed, the front end of described main shaft [27] is a square tenon, there is a circular hole at the middle part of side's tenon, a stage clip [25] and a steel ball [26] are arranged in the circular hole, the middle part of main shaft [27] is a hexagon prism, press in the hexagon prism and join a dial [31], oiliness bearing [28] is the front portion that is enclosed within main shaft [27], and the elliptical aperture that dial [31] and bump slide block [24] are passed in the rear portion of main shaft [27] inserts in the bearing group [14] in the flying wheel combination [3].

Claims

1. one kind large-scale Vehicular electric wrench, include a direct-flow micromachine in its housing, a clutch pack, a flying wheel combination, a moment output shaft combination, a switch, housing has a power line that has cigarette lighter plug outward, it is characterized in that: a direct-flow micromachine is arranged in the motor slot of housing, the output of direct-flow micromachine and clutch pack connect, clutch pack is inserted the rear end of flying wheel combination, there is an envelope the bearing of bump protection ring on the rear end axle of flying wheel combination, bearing is installed in the rear bearing slot of left shell, it in the front aperture of flying wheel combination a moment output shaft combination, in the switch groove at the rear portion of left shell, the switch that can control the motor direction of rotation is housed, with a power line that has cigarette lighter plug with switch, motor connects, the fuse that a 12A is arranged in the described cigarette lighter plug, with direct-flow micromachine, the clutch combination, the flying wheel combination, the combination of moment output shaft, switch, after the power line that has a cigarette lighter plug all inserts separately in the notch, the right casing that closes is fixed left and right sides shell with screw.

2. large-scale electric spanner for vehicle according to claim 1, it is characterized in that: the clutch combination is by a bump take-up housing, two brake pads, two small extension springs, four pins are formed, described brake pad, on its arc limit, be inlaid with wear-resisting leather or asbestos packing sheet, two brake pads by two small extension springs with the slotted eye kink on the projection of bump take-up housing, the two ends of small extension spring are fixed on two brake pads by four pins respectively, and the bump take-up housing has a flat round hole and the fastening connection of motor shaft.

3. large-scale electric spanner for vehicle according to claim 1, it is characterized in that: the flying wheel combination is the flywheel that has certain mass by, a bump slide block, two extension springs, four little axles, one group of bearing, a swivel nut, a stage clip, a steel ball, a rear bearing, a shock-absorbing sleeve, a friction sleeve is formed, in the middle of the described flywheel is a rectangular through-hole, the bump slide block is contained in the rectangular through-hole, there are two through holes on two limits of bump slide block, are two extension springs in the through hole, and four the little two ends of passing two extension springs respectively are separately fixed on flywheel and the bump slide block, on the limit of rectangular through-hole a screw is arranged, a swivel nut and a stage clip are arranged in the screw, and a steel ball, steel ball have certain pressure to the pit of bump slide block side under the effect of stage clip, the front end of flywheel has one group of bearing to be fastened in its circular hole, a rear bearing is housed on the rear end axle of flywheel, and there is a shock absorbing ring outer ring of rear bearing, is a two keyway in the rear end axis hole of flywheel, there are a friction sleeve and it to connect, have a push rod to be fixed therein in the hole of described friction sleeve with the interference fits form.

4. large-scale electric spanner for vehicle according to claim 1, it is characterized in that: the combination of moment output shaft is by a main shaft, a dial, several steel balls, a steel bushing is formed, the front end of described main shaft is a square tenon, there is a circular hole at the middle part of side's tenon, a stage clip and a steel ball are arranged in the circular hole, the middle part of main shaft is a hexagon prism, dial of close-fitting in the hexagon prism, oiliness bearing is the front portion that is enclosed within main shaft, the elliptical aperture that dial, bump slide block are passed in the rear portion of main shaft inserts in the bearing group in the flying wheel combination.