CN210819308U - Multiple speed change ratchet wheel assembly for hand tool - Google Patents
Multiple speed change ratchet wheel assembly for hand tool Download PDFInfo
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- CN210819308U CN210819308U CN201921705116.XU CN201921705116U CN210819308U CN 210819308 U CN210819308 U CN 210819308U CN 201921705116 U CN201921705116 U CN 201921705116U CN 210819308 U CN210819308 U CN 210819308U
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Abstract
The utility model discloses a hand tool multiple speed change ratchet wheel component, a positioning pin is arranged at the upper end of a main body seat, a speed change gear is sleeved with the positioning pin, after a speed change inner gear ring is arranged with the main body seat, three speed change gears are all synchronously engaged with inner teeth, a snap spring I of a ratchet rod is arranged in a snap spring groove II and then penetrates the ratchet rod into a middle hole of an adjusting ring cover and penetrates downwards and the tail end of the ratchet rod is exposed out of the lower end surface of the main body seat, a snap spring II is arranged in a snap spring groove I, a fixed end is positioned between round holes formed by the inner circumferences of a roller I and a roller II and the axial position of the fixed end corresponds to the round holes, external teeth are engaged with the three speed change gears and can transmit, the utility model has three working modes of left-right rotation locking, left-rotation locking and right-rotation locking, when the main body seat synchronously drives the ratchet, the corresponding multiple drives the ratchet rod to rotate at variable speed, and the working efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of hand tool class technique and specifically relates to a hand tool multiple speed change ratchet wheel subassembly.
Background
The screw is taken as a conventional connecting and fixing part, the screw and the thread of the screw hole are connected in a rotating mode and are converted into linear tensioning, the screw is widely applied to the connection of various product parts, if in mass production, a point electric screw driver or a pneumatic screw driver is mostly adopted, however, in reality, in families or common daily maintenance, a screw driver type hand tool which basically adopts common manual force application rotation is adopted, a left-handed unidirectional screw driver and a right-handed unidirectional screw driver are needed, the conventional hand tool basically adopts a handle of a handle which rotates a circle, the hand tool drives a screw driver head to synchronously rotate a circle, a screw is screwed up or unscrewed for a circle, the theoretical and operational problems are solved, and the efficiency is low, particularly, the long screw with small screw pitch is 1mm, the length of the screw thread is 60mm, the screw thread rotates a circle, the screw thread enters or exits 1mm, the wrist can be fastened in place or completely unscrewed only by rotating 60 circles, the time is long, the working efficiency is low, and the wrist is sore.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a hand tool multiple speed change ratchet wheel component, wherein a positioning pin is arranged at the upper end of a main body seat, a speed change gear is sleeved with the positioning pin, after a speed change inner gear ring is arranged on the main body seat, three speed change gears are all synchronously engaged with inner teeth, a first clamp spring of a ratchet rod is arranged in a second clamp spring groove and then penetrates the ratchet rod into a middle hole of an adjusting ring cover, the ratchet rod penetrates downwards and the tail end of the ratchet rod is exposed out of the lower end surface of the main body seat, a second clamp spring is arranged in the first clamp spring groove, a fixed end is positioned between round holes formed by the inner circumferences of a first roller shaft and a second roller shaft, the axial position of the fixed end corresponds to the axial position, external teeth are engaged with the three speed change gears and can transmit, the utility model has three working modes of left-right rotation locking, left, the speed change gear and the speed change gear outer cover generate multiple rotation, and the corresponding multiple drives the ratchet rod to rotate in a speed change manner, so that the working efficiency is improved.
In order to achieve the above object, the utility model provides a hand tool multiple speed change ratchet wheel component, comprising a ratchet rod, an adjusting ring cover, a shifting fork, a first rolling shaft, a second rolling shaft, a first spring, a first rolling shaft seat, a speed change gear outer cover, a speed change inner gear ring, a positioning pin, a speed change gear and a main body seat, wherein the upper end and the lower end of the step of the main body seat flange provided with a middle hole are respectively provided with a seat body and a spline shaft, the outer circumference of the spline shaft is uniformly provided with a straight spline, the upper end surface of the seat body is vertically and uniformly provided with three spacer blocks, and the middle positions of;
one end of the positioning pin is inserted into and connected with the positioning hole, the other end of the positioning pin is exposed out of the end face of the base body and extends upwards, the speed change gear is sleeved with the positioning pin, and the sleeved speed change gear can rotate by taking the positioning pin as a base shaft;
the speed change inner gear ring is mounted with the main body seat, after mounting, the three speed change gears are all synchronously meshed with the inner teeth, the upper end surface of each speed change gear is flush with the upper end surface of the speed change inner gear ring, when the speed change inner gear ring is rotated, the three speed change gears are driven to synchronously rotate, and a plurality of straight teeth are uniformly distributed on the outer circumference of the speed change inner gear ring;
straight grooves are uniformly distributed on the inner ring of the speed change gear outer cover, the speed change gear outer cover is sleeved outside the speed change inner gear ring, and the straight grooves are in embedded meshing connection with the straight teeth;
the roller seat is provided with a first through hole, the upper end of the first through hole is provided with a roller mounting hole, the inner wall of the roller mounting hole is formed by connecting inner arc surfaces 901 with three identical surfaces, the distance between the two ends of the inner arc surfaces 901 and the first through hole is a1, the distance between the middle position of the inner arc surfaces and the first through hole is a2, a1 gradually increases along the inner arc surfaces and transits to the middle position a2, a2 is the maximum value, and a1 is the minimum value;
the first rolling shaft and the second rolling shaft are arranged in a space formed by arc surfaces in each surface in a row, the first rolling shaft and the second rolling shaft are arranged in a spring I in a double-layer mode, and two ends of the spring I elastically support the circumferential walls of the first rolling shaft and the second rolling shaft respectively;
a spring mounting hole is formed in the upper end face of the roller seat, a second spring is arranged in the spring mounting hole, and a steel ball is arranged at the upper end of the second spring;
the main plate of the shifting fork is provided with a through hole, three bevel edges II are uniformly distributed on the outer circumference of the main plate, three shifting fork rods extending downwards are uniformly distributed on the lower end face of the main plate, the shifting fork rods of the shifting fork are downwards overlapped on the upper end face of the roller seat, the lower end face of the main plate is elastically abutted against steel balls, and the shifting fork rods are positioned between the adjacent first roller and the adjacent second roller in the roller mounting hole;
the roller seat with the shifting fork installed is installed in the inner ring of the outer cover of the speed change gear, and the lower end surface of the roller seat props against the upper end surface of the speed change inner gear ring;
three arc surfaces are uniformly distributed in the adjusting ring cover, the arc surfaces are connected by three bevel edges, and the arc surfaces and the bevel edges are correspondingly sleeved with the main board and the bevel edges;
the lower end of a transmission rod of the ratchet rod is a fixed end, the ratchet rod penetrates into a middle hole of the adjusting ring cover after the first snap spring 1 is arranged in the second snap spring groove, the ratchet rod connected with the adjusting ring cover downwards penetrates into the shifting fork, the roller seat and the main body seat, the tail end of a connecting rod of the ratchet rod is exposed out of the lower end face of the main body seat, the second snap spring is arranged in the first snap spring groove, the fixed end is located between round holes formed in the first roller and the second roller, the axial positions of the round holes correspond to those of the first roller and the second roller, and the outer teeth.
Further, the specification of the straight groove conforms to the specification of the straight tooth.
Further, the fit clearance between the positioning pin and the positioning hole is not more than 0.02 mm.
Further, a hexagonal hole is formed in the upper end of the transmission rod.
And further setting, the number of the internal teeth of the speed change internal gear ring is a multiple of the number of the speed change gear teeth.
It is further provided that the modulus of the internal teeth is the same as the modulus of the change gear.
The utility model has the advantages that: the utility model discloses there are at left dextrorotation locking, levogyration locking and three kinds of mode of dextrorotation locking, when rotatory main part seat drives the ratchet pole rotation in step, the outside synchronous speed change ring gear irrotational that makes of variable speed tooth dustcoat is held to the hand, and speed change gear produces the multiple rotation with the variable speed tooth dustcoat, and corresponding multiple drives the ratchet pole variable speed and rotates, improves work efficiency.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic view of the main body seat of FIG. 2;
FIG. 4 is a schematic view of the fork of FIG. 2;
FIG. 5 is a schematic view of the ratchet rod of FIG. 2;
FIG. 6 is a schematic view of the speed change ring gear of FIG. 2;
FIG. 7 is a state diagram of a first roller and a second roller in the roller seat when the left and right rotation is locked;
FIG. 8 is a state diagram of a first roller and a second roller in the roller seat when the left-handed locking is performed and the right-handed rotation is performed;
FIG. 9 is a state diagram of a first roller and a second roller in the roller seat when the right-hand locking is performed and the left-hand rotation is performed;
FIG. 10 is a schematic view of the connection of the three inner arcuate surfaces of the roller mounting hole of FIG. 7;
FIG. 11 is a schematic view of the adjustment bonnet 3 of FIG. 2;
fig. 12 is an assembly view of the ratchet lever 2, the positioning pin 12, the speed change gear 13, and the main body housing 14 in fig. 2.
In the figure: the gear shifting mechanism comprises a snap spring I1, a ratchet rod 2, external teeth 201, a connecting rod 202, a transmission rod 203, a snap spring groove 204, a hexagonal hole 205, a snap spring groove II 206, a fixed end 207, an adjusting ring cover 3, an arc surface 301, a bevel edge 302, a shifting fork 4, a main plate 401, a shifting fork rod 402, a through hole 403, a bevel edge II 404, a roller I5, a roller II 51, a spring I6, a steel ball 7, a spring II 8, a roller seat 9, an inner arc surface 901, a spring mounting hole 902, a roller mounting hole 903, a through hole I904, a gear shifting gear outer cover 10, a straight groove 1010, a gear shifting inner gear ring 11, internal teeth 1101, straight teeth 1102, a positioning pin 1405, a speed changing gear 13, a main body seat 14, a step 1401, a spline shaft 1402, a seat 1403, a positioning hole.
Detailed Description
As shown in fig. 1, 2, and 12: the technical scheme of the utility model is further specifically explained, a hand tool multiple speed change ratchet wheel component, contain ratchet rod 2, adjust circle cover 3, shift fork 4, roller one 5, roller two 51, spring one 6, roller seat 9, change gear dustcoat 10, variable speed ring gear 11, locating pin 12, change gear 13, main part seat 14, as shown in fig. 3, step 1401 upper end and lower extreme of the main part seat 14 flange that establishes middle hole 1405 establish seat 1403 and integral key shaft 1402 respectively, the outer circumference equipartition straight tooth spline of integral key 1402, three spacers 1406 of upright equipartition of up end of seat 1403, the seat 1403 intermediate position between adjacent spacer 1406 respectively sets for the position hole 1404; one end of a positioning pin 12 is inserted into and connected with the positioning hole 1404, the other end of the positioning pin 12 is exposed out of the end face of the seat 1403 and extends upwards, the speed change gear 13 is sleeved with the positioning pin 12, and the sleeved speed change gear 13 can rotate by taking the positioning pin 12 as a base shaft;
the speed change ring gear 11 and the main body seat 14 are installed, after installation, three speed change gears 13 are synchronously meshed with the inner teeth 1101, the upper end surface of the speed change gear 13 is flush with the upper end surface of the speed change ring gear 11, when the speed change ring gear 11 is rotated, the three speed change gears 13 are driven to synchronously rotate, when the main body seat 14 rotates, the three speed change gears 13 also drive the speed change ring gear 11 meshed with the three speed change gears 13 to synchronously rotate, as shown in fig. 6, a plurality of straight teeth 1102 are uniformly distributed on the outer circumference of the speed change ring gear 11, straight grooves 1010 are uniformly distributed on the inner circumference of the speed change gear outer cover 10, the speed change gear outer cover 10 is sleeved outside the speed change ring gear 11 to be in embedded type meshing connection with the straight grooves 1010 of the speed change gear outer cover 10, when the main body seat 14 is rotated, when the speed change gear outer cover 10 is manually fixed, the speed change ring gear 11 does not rotate, and the, the rotation multiple of the speed change gear 13 is determined according to the gear multiple of the speed change gear 13 and the speed change inner gear ring 11, when the number of teeth of the speed change gear 13 is 20 teeth and the number of teeth of the speed change inner gear ring 11 is 100 teeth, the multiple is 1:5, the speed change inner gear ring 11 is manually fixed without rotating, when the main body seat 14 rotates, the main body seat 14 rotates for one circle, and the speed change gear 13 rotates for 5 circles at multiple speed change.
As shown in fig. 10, the roller seat 9 is provided with a first through hole 904, the upper end of the first through hole 904 is provided with a roller mounting hole 903, the inner wall of the roller mounting hole 903 is formed by connecting inner arc surfaces 901 with three identical surfaces, the distance between two ends of the inner arc surface 901 and the first through hole 904 is a1, the distance between the middle position of the inner arc surface 901 and the first through hole 904 is a2, a1 gradually increases along the inner arc surface 901 and transits to the middle position a2, a2 is the maximum value, and a1 is the minimum value; a2 is greater than the diameter of roller one 5 and roller two 51 and a1 is less than the diameter of roller one 5 and roller two 51.
As shown in fig. 7, the first roller 5 and the second roller 51 are arranged in a space formed by arc surfaces 901 in each surface, a first spring 6 is arranged between the first roller 5 and the second roller 51, and two ends of the first spring 6 respectively and elastically support the circumferential walls of the first roller 5 and the second roller 51;
a spring mounting hole 902 is formed in the upper end face of the roller seat 9, a second spring 8 is arranged in the spring mounting hole 902, and a steel ball 7 is arranged at the upper end of the second spring 8;
as shown in fig. 4, a main plate 401 of the shift fork 4 is provided with a through hole 403, three bevel edges and two bevel edges 404 are uniformly distributed on the outer circumference of the main plate 401, three shift fork rods 402 extending downwards are uniformly distributed on the lower end surface of the main plate 401, the shift fork rods 402 of the shift fork 4 are downwards stacked on the upper end surface of the roller seat 9, the lower end surface of the main plate 401 is elastically abutted against steel balls 7, and the shift fork rods 402 are located between adjacent first rollers 5 and second rollers 51 in the roller mounting hole 903; as shown in fig. 11, three arc surfaces 301 are uniformly distributed in the adjusting ring cover 3, the arc surfaces 301 are connected by three inclined edges 302, the arc surfaces 301 and the inclined edges 302 are correspondingly sleeved with a main board 401 and a second inclined edge 404, and the above structures are connected, so that when the adjusting ring cover 3 is rotated, the shifting fork 4 can be synchronously driven to rotate, and the shifting fork rod 402 can shift the first rolling shaft 5 or the second rolling shaft 51 to move;
the roller seat 9 with the shifting fork 4 installed is arranged in the inner ring of the speed change gear outer cover 10, and the lower end surface of the roller seat abuts against the upper end surface of the speed change inner gear ring 11; as shown in fig. 5, the lower end of the transmission rod 203 of the ratchet rod 2 is a fixed end 207, the first snap spring 1 is arranged in the second snap spring groove 206 and then penetrates the ratchet rod 2 into the middle hole of the adjusting ring cover 3, the ratchet rod 2 connected with the adjusting ring cover 3 downwards penetrates the shifting fork 4, the roller seat 9 and the main body seat 14, the tail end of the connecting rod 202 of the ratchet rod 2 is exposed out of the lower end face of the main body seat 14, the second snap spring 15 is arranged in the first snap spring groove 204, the fixed end 207 is positioned between round holes formed by the inner circumferences of the first roller 5 and the second roller 51 and corresponds to the axial position, and the external teeth 201 are meshed with the three speed-change.
The specification of the straight groove 1010 is in accordance with that of the straight tooth 1102, and the straight groove can be meshed for transmission after being assembled.
The fit clearance between the positioning pin 12 and the positioning hole 1404 is not more than 0.02mm, so that the clearance error during transmission can be controlled conveniently.
And a hexagonal hole 205 is formed in the upper end of the transmission rod 203, so that the installation of the screwdriver head is facilitated.
The number of teeth of internal teeth 1101 of speed change ring gear 11 is a multiple of the number of teeth of speed change gear 13, such as 5: 1. 4: 1. 5: 1. 3: 1. 4.5: 1.. the can set according to actual demand.
The module of the internal teeth 1101 is the same as that of the speed change gear 13.
Example of the implementation
After the whole assembly of the technical scheme is completed, the main body seat 14 is connected with a handle of a hand tool, the spline shaft 1402 is in inserted engagement with an internal spline of the handle, when the handle rotates to drive the connected main body seat 14 to rotate, the three positioning pins 12 in the main body seat drive the speed changing gears 13 which are respectively connected to the three positioning pins to rotate circumferentially by taking the axis of the main body seat 14 as a base line, and the three speed changing gears 13 and a transmission mode which is arranged in the middle and is engaged with the external teeth 201 drive the ratchet rod 2 to rotate synchronously; when the handle is not rotated at rest, the ratchet rod 2 is held by hand and rotated, and the external teeth 201 at the lower end of the ratchet rod 2 can drive the three speed change gears 13 to synchronously rotate by taking the respectively connected positioning pins 12 as base shafts, but can not drive the main body seat 14 to rotate.
When 1:1 multiple constant speed transmission is adopted, the rotating handle can synchronously drive the main body seat 14 to rotate, the teeth of the three internal speed change gears 13 and the external teeth 201 of the ratchet rod 2 are always in a static meshing state, when the main body seat 14 rotates, the three positioning pins 12 drive the speed change gears 13 to integrally rotate, the speed change gears 13 in the static meshing state drive the ratchet rod 2 to rotate and screw or unscrew screws, the rotating state is a non-multiple constant speed state, the main body seat 14 rotates, the speed change inner gear ring 11 meshed with the speed change gears 13 synchronously rotates, the external handle rotates for one circle, and the ratchet rod 2 drives the mounted screwdriver head to rotate for one circle.
When multiple speed-changing transmission is adopted, if the number of teeth 1101 of the speed-changing inner gear ring 11 is 5:1 times that of the speed-changing gear 13, the rotating handle can synchronously drive the main body seat 14 to rotate, the speed-changing gear outer cover 10 is pinched by the other hand to synchronously make the speed-changing inner gear ring 11 stationary and not rotate, when the main body seat 14 rotates, the speed-changing inner gear ring 11 is stationary and is in a stationary state, the main body seat 14 drives the three positioning pins 12 inside to drive the speed-changing gears 13 connected with each other to rotate circumferentially with the axis of the main body seat 14 as a base line, the main body seat 14 rotates for a circle, the gears of each speed-changing gear 13 are meshed and spirally rotated for a circle around the inner teeth 1101 of the speed-changing inner gear ring 11, when the single speed-changing gear 13 is meshed and spirally rotated for a circle around the inner teeth 1101 of the speed-changing inner gear ring 11 to reach the original position, the speed change gear 13 rotating 5 circles synchronously drives the ratchet rod 2 engaged with the external teeth 201 to rotate 5 circles at multiple speed change, and the ratchet rod 2 drives the mounted screwdriver bit to rotate 5 circles to achieve the rotation function of multiple speed change.
When the position of the adjusting ring cover 3 is adjusted to enable the hand tool to be in a left-right locking state, as shown in fig. 7, the shifting fork rod 402 is adjusted to be located at the middle position of the first rolling shaft 5 and the second rolling shaft 51 without contact, at this time, the first rolling shaft 5 and the second rolling shaft 51 are pushed by the elastic force of the first spring 6 to outwards abut against the inner arc surface 901 and the fixed end 207, the width of the position is smaller than a2 and larger than a1 and equal to the diameters of the first rolling shaft 5 and the second rolling shaft 51, when the ratchet rod 2 rotates left, the fixed end 207 drives the second rolling shaft 51 in elastic contact to move towards the direction of a1 in a left rolling mode, the circumferential wall of the second rolling shaft 51 radially presses the circumferential wall of the fixed end 207 and clamps the fixed end 207; when the ratchet rod 2 rotates rightwards, the fixed end 207 drives the roller I5 which is in elastic contact to move towards a1 in a rightward rolling mode, the circumferential wall of the roller I5 radially presses the circumferential wall of the fixed end 207 and clamps the fixed end 207, so that the fixed end 207 cannot rotate, and the right rotation is locked;
when the hand tool is in a left-handed locking and right-handed moving state, as shown in fig. 8, the shifting fork rod 402 is adjusted to rotate to the left and pushes the first rolling shaft 5 to move to the left, at the moment, the second rolling shaft 51 is pushed by the elastic force of the first spring 6 to abut against the inner arc surface 901 and the fixed end 207, the width of the position of the first rolling shaft 5 is larger than the diameter of the first rolling shaft 5 and is not in contact with the fixed end 207, when the ratchet rod 2 rotates to the left, the fixed end 207 drives the second rolling shaft 51 in elastic contact to move towards the direction a1 in a left-handed rolling mode, the circumferential wall of the second rolling shaft 51 radially presses the circumferential wall of the fixed end 207 and clamps the fixed end; when the ratchet rod 2 rotates rightwards, the fixed end 207 can drive the second rolling shaft 51 to elastically retreat rightwards to lock the fixed end 207, the first rolling shaft 5 is not in contact with the fixed end 207, and the right rotation moves.
When the hand tool is in a right-handed locking left-handed movement state, as shown in fig. 9, the shifting fork rod 402 is adjusted to rotate rightwards and push the second rolling shaft 51 to move rightwards, at the moment, the first rolling shaft 5 is pushed by the elastic force of the first spring 6 to abut against the inner arc surface 901 and the fixed end 207, the width of the position where the second rolling shaft 51 is located is larger than the diameter of the second rolling shaft 51 and is not in contact with the fixed end 207, when the ratchet rod 2 rotates rightwards, the fixed end 207 drives the first rolling shaft 5 in elastic contact to move rightwards in a rolling mode in the direction a1, the circumferential wall of the first rolling shaft 5 radially presses the circumferential wall of the fixed end 207 and clamps the fixed; when the ratchet rod 2 rotates leftwards, the fixed end 207 can drive the first rolling shaft 5 to elastically retract leftwards to lock the fixed end 207, the second rolling shaft 51 is not in contact with the fixed end 207, the left rotation is movable, in the state, the rotating screw can be locked by the right rotation, and the left rotation can be returned by an angle to be convenient for entering the next right rotation.
The utility model discloses a ratchet subassembly of hand tool, can multiple speed change function, when possessing left dextrorotation locking, three kinds of hand tool mode of levorotation locking and dextrorotation locking, multiple speed change function has, reach the function of quick screw, when rotatory main part seat drives the ratchet pole rotation in step, the outside synchronous speed change ring gear irrotational that makes of variable speed tooth dustcoat is held to the hand, change gear produces multiple variable speed with the variable speed tooth dustcoat and rotates, corresponding multiple drives the ratchet pole variable speed and rotates, and work efficiency is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (6)
1. The hand tool multiple speed change ratchet wheel component is characterized in that: the ratchet wheel comprises a ratchet rod (2), an adjusting ring cover (3), a shifting fork (4), a first rolling shaft (5), a second rolling shaft (51), a first spring (6), a rolling shaft seat (9), a speed change gear outer cover (10), a speed change inner gear ring (11), a positioning pin (12), a speed change gear (13) and a main body seat (14), wherein a seat body (1403) and a spline shaft (1402) are respectively arranged at the upper end and the lower end of a step (1401) of a flange of the main body seat (14) provided with a middle hole (1405), a straight spline is uniformly distributed on the outer circumference of the spline shaft (1402), three spacer blocks (1406) are vertically and uniformly distributed on the upper end surface of the seat body (1403), and a position hole (1404) is respectively set at the middle;
one end of the positioning pin (12) is inserted into and connected with the positioning hole (1404), the other end of the positioning pin (12) is exposed out of the end face of the base body (1403) and extends upwards, the speed change gear (13) is sleeved with the positioning pin (12), and the sleeved speed change gear (13) can rotate by taking the positioning pin (12) as a base shaft;
the speed change ring gear (11) is mounted with the main body seat (14), after mounting, three speed change gears (13) are synchronously meshed with the inner teeth (1101), the upper end surface of each speed change gear (13) is flush with the upper end surface of the speed change ring gear (11), when the speed change ring gear (11) is rotated, the three speed change gears (13) are driven to synchronously rotate, and a plurality of straight teeth (1102) are uniformly distributed on the outer circumference of the speed change ring gear (11);
straight grooves (1010) are uniformly distributed on the inner ring of the speed change gear outer cover (10), the speed change gear outer cover (10) is sleeved outside the speed change inner gear ring (11), and the straight grooves (1010) are in embedded meshing connection with the straight teeth (1102);
the roller seat (9) is provided with a first through hole (904), the upper end of the first through hole (904) is provided with a roller mounting hole (903), the inner wall of the roller mounting hole (903) is formed by connecting inner arc surfaces (901) with three identical surfaces, the distance between the two ends of each inner arc surface (901) and the first through hole (904) is a1, the distance between the middle position of each inner arc surface (901) and the first through hole (904) is a2, a1 gradually increases along the inner arc surfaces (901) and transits to the middle position a2, a2 is the maximum value, and a1 is the minimum value;
the first rolling shaft (5) and the second rolling shaft (51) are arranged in a space formed by arc surfaces (901) in each surface in a row, a first spring (6) is arranged between the first rolling shaft (5) and the second rolling shaft (51), and two ends of the first spring (6) respectively and elastically prop against the circumferential walls of the first rolling shaft (5) and the second rolling shaft (51);
a spring mounting hole (902) is formed in the upper end face of the roller seat (9), a second spring (8) is arranged in the spring mounting hole (902), and a steel ball (7) is arranged at the upper end of the second spring (8);
a main plate (401) of the shifting fork (4) is provided with a through hole (403), three bevel edges II (404) are uniformly distributed on the outer circumference of the main plate, three shifting fork rods (402) extending downwards are uniformly distributed on the lower end face of the main plate (401), the shifting fork rods (402) of the shifting fork (4) are downwards stacked on the upper end face of the roller seat (9), the lower end face of the main plate (401) is elastically abutted against steel balls (7), and the shifting fork rods (402) are located in positions between adjacent first rolling shafts (5) and second rolling shafts (51) in the rolling shaft mounting holes (903);
the roller seat (9) provided with the shifting fork (4) is arranged in the inner ring of the speed change gear outer cover (10), and the lower end surface of the roller seat props against the upper end surface of the speed change inner gear ring (11);
three arc surfaces (301) are uniformly distributed in the adjusting ring cover (3), the arc surfaces (301) are connected through three inclined edges (302), and the arc surfaces (301) and the inclined edges (302) are correspondingly sleeved with the main board (401) and the inclined edges (404);
the lower end of a transmission rod (203) of the ratchet rod (2) is a fixed end (207), a first snap spring (1) is arranged in a second snap spring groove (206) and then penetrates the ratchet rod (2) into a middle hole of the adjusting ring cover (3), the ratchet rod (2) connected with the adjusting ring cover (3) downwards penetrates a shifting fork (4), a roller seat (9) and a main body seat (14), the tail end of a connecting rod (202) of the ratchet rod (2) is exposed out of the lower end face of the main body seat (14), a second snap spring (15) is arranged in a first snap spring groove (204), the fixed end (207) is located between round holes formed in the first roller (5) and the second roller (51) and corresponds to the axial position, and the outer teeth (201) are meshed with three speed change gears (13) and can transmit.
2. The hand tool multiple speed change ratchet assembly of claim 1, wherein: the specification of the straight groove (1010) is in accordance with that of the straight tooth (1102).
3. The hand tool multiple speed change ratchet assembly of claim 1, wherein: and the fit clearance between the positioning pin (12) and the positioning hole (1404) is not more than 0.02 mm.
4. The hand tool multiple speed change ratchet assembly of claim 1, wherein: a hexagonal hole (205) is arranged in the upper end of the transmission rod (203).
5. The hand tool multiple speed change ratchet assembly of claim 1, wherein: the number of teeth of the inner teeth (1101) of the speed change inner gear ring (11) is a multiple of the number of teeth of the speed change gear (13).
6. The hand tool multiple speed ratchet assembly of claim 5, wherein: the modulus of the internal teeth (1101) is the same as that of the speed change gear (13).
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| CN201921705116.XU CN210819308U (en) | 2019-10-12 | 2019-10-12 | Multiple speed change ratchet wheel assembly for hand tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110576403A (en) * | 2019-10-12 | 2019-12-17 | 绍兴环洲工具制造有限公司 | multiple speed changing ratchet wheel assembly for hand tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110576403A (en) * | 2019-10-12 | 2019-12-17 | 绍兴环洲工具制造有限公司 | multiple speed changing ratchet wheel assembly for hand tool |
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