CN200991872Y - Ratchet device - Google Patents

Abstract

The utility model discloses a ratchet wheel device, comprising a fixing unit, a switching unit and a ratchet unit. The fixing unit comprises a body which has a peripheral surface and two opposite holding slots whose two ends are formed from the peripheral surface of the body. The switching unit comprises a switching ring which is reelingly hitched to the body and is provided with four locking slots which correspond to the holding slots. The ratchet unit comprises a ratchet hitched to the body, a first detent, a second detent, a third detent and a fourth detent arranged in the holding slots respectively. The locking slots are provided for the detents to enter to restrict the ratchet. The ratchet wheel device of the utility model has the beneficiary effects that torque force is increased owning to the arrangement of the detents and the force applied on the detents is reduced, thus prolonging the service period of the ratchet wheel device.

Description

Ratchet device

Technical field

The utility model relates to a kind of ratchet device, particularly relates to the ratchet device that a kind of torsion is big and service life is long.

Background technology

Fig. 1 and Fig. 2 show a kind of in the past ratchet device 1, and this ratchet device 1 is applicable to for various screwdriver heads 20 and installs, and comprise a fixed cell 11, a switch unit 12 and a ratchet unit 13.

This fixed cell 11 comprises one along long body 111 to extension, this body 111 has an operative end surface 112, one in contrast to this operative end surface 112 and be installed on driving end face 113, the body outer peripheral face 114 that connects this work, drives end face 112,113 on the handgrip, and two spaces and contiguous these operative end surface 112 hold blind groove 115.

This switch unit 12 comprises that is overlapped a switching ring 121 that is arranged at this body 111 rotatably, and this switching ring 121 has two corresponding described clamping grooves 122 that blind groove 115 is formed at an inner peripheral surface that hold.

This ratchet unit 13 comprises that a cover is arranged at the operative end surface 112 of this body 111 and the ratchet installed for this screwdriver head 20 131, two are arranged at the described flexible member 132 that holds blind groove 115 respectively, and one first pallet 133 and one second pallet 134 of being arranged at described flexible member 132 2 outer ends respectively, described clamping groove 122 stretches into for described pallet 133,134 respectively, and this ratchet 131 has most around being arranged at the ratchet 135 that an inner peripheral surface is limited by described pallet 133,134.

Described switching ring 121 relatively this body 111 a fixed position, a position forward, and a reverse position rotates.

Consult Fig. 1 and Fig. 2, when this switches ring 121 in this fixed position, this first and second pallet 133,134 stretches into respectively in the described clamping groove 122, and this first and second pallet 133,134 can limit described ratchet 135, this ratchet 131 can't be rotated with respect to this body 111, and produce the function of two-way drive.

Consult Fig. 1 and Fig. 3, when this switches ring 121 at this forward during the position, this first pallet 133 is held in the blind groove 115 in this by these switching ring 121 limits, and can't touch the ratchet 135 of this ratchet unit 13, this second pallet 134 stretches in this clamping groove 122, and can limit described ratchet 135, make this ratchet 131 relatively this body 111 rotate along a first direction A, and produce the function of unidirectional drive.

Consult Fig. 1 and Fig. 4, when this switches ring 121 at this reverse position, this second pallet 134 is held in the blind groove 115 in this by these switching ring 121 limits, and can't touch the ratchet 135 of this ratchet unit 13, this first pallet 133 stretches in this clamping groove 122, and can limit described ratchet 135, make this ratchet 131 relatively this body 111 rotate along a second direction B, and produce the function of unidirectional drive.

Though this ratchet device 1 can reach the function that this screwdriver head 20 of the two-way or unidirectional drive of user rotates, and still has following disappearance:

One, this first or second pallet 133,134 when the some rotation directions of restriction, has only single pallet stressed when the described ratchet 135 of restriction, and therefore the grip deficiency can make ratchet 135 slide sometimes, causes having the disappearance of torsion deficiency.

Two, when the some rotation directions of restriction, have only single pallet stressed, can make that this first and second pallet 133,134 and described ratchet 135 power of bearing are very big, the abrasion of this first and second pallet 133,134 and described ratchet 135 are also bigger, cause having short disappearance in service life.

The utility model content

The purpose of this utility model is to provide the ratchet device that a kind of torsion is big and service life is long.

The purpose of this utility model is achieved in that promptly provides a kind of ratchet device, and be applicable to for various screwdriver heads to install, and comprise a fixed cell, a switch unit and a ratchet unit, wherein:

This fixed cell comprises one along long body to extension, and this body has an operative end surface, a driving end face in contrast to this operative end surface, a body outer peripheral face that connects this work, drives end face, and the holding tank of two spaces.Contiguous this operative end surface of described holding tank, each holding tank runs through this body and opposite two ends all are formed at this body outer peripheral face.

This switch unit comprises that is overlapped a switching ring that is arranged at this body rotatably, and this switching ring has the clamping groove that four corresponding described holding tanks are formed at an inner peripheral surface.

This ratchet unit comprises that a cover is arranged at the operative end surface of this body and ratchet, two flexible members that are arranged at described holding tank respectively of installing for this screwdriver head, and be arranged at one first pallet of opposite two ends of described flexible member, second pallet, the 3rd pallet and one the 4th pallet respectively, described clamping groove stretches into for described pallet respectively, and this ratchet has most around being arranged at the ratchet that an inner peripheral surface is limited by described pallet.

The beneficial effects of the utility model are, the setting of this first, second, third and fourth pallet makes torsion increase, and the stressed minimizing of described pallet, make the use longevity of this ratchet device increase.

Description of drawings

Fig. 1 is a three-dimensional exploded view, and it illustrates a kind of in the past ratchet device;

Fig. 2 is a cutaway view, and one of its explanation is switched the relative body of ring a fixed position;

Fig. 3 is the view of a similar Fig. 2, its illustrate this switching ring relatively this body a position forward;

Fig. 4 is the view of a similar Fig. 2, and it illustrates that relative this body of this switching ring is at a reverse position;

Fig. 5 is a cutaway view, a preferred embodiment of its explanation the utility model ratchet device;

Fig. 6 is a cutaway view, and one of its explanation is switched the relative body of ring a fixed position;

Fig. 7 is a cutaway view, and its explanation is switched ring when this fixed position, and relative this body of ratchet can't rotate;

Fig. 8 is the view of a similar Fig. 6, its illustrate this switching ring relatively this body a position forward;

Fig. 9 is the view of a similar Fig. 7, and its explanation is switched ring at this forward during the position, and this ratchet this body relatively rotates along a first direction;

Figure 10 is the view of a similar Fig. 6, and it illustrates that relative this body of this switching ring is at a reverse position; And

Figure 11 is the view of a similar Fig. 7, and its explanation is switched ring when this reverse position, and this ratchet this body relatively rotates along a second direction.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is elaborated:

Consult Fig. 5, Fig. 6, Fig. 7, the preferred embodiment of the utility model ratchet device is applicable to for various screwdriver heads and installs, and comprises a fixed cell 3, a switch unit 4 and a ratchet unit 5.

This fixed cell 3 comprises one along long body 31 to extension, and a C type ring 32.This body 31 have an operative end surface 311, one in contrast to the driving end face 312 of this operative end surface 311, one connect this work, drive the body outer peripheral face 313 of end face 311,312, two spaces and parallel holding tank 34, an element containing groove 35, and annular groove 36.It is wide less than this root face section 314 and connect the end face section 315 of this operative end surface 311 that this body outer peripheral face 313 has a root face section that connects this drivings end face 312 314, footpath, and the shoulder face section 316 of this root of connection, end face section 314,315.

Described holding tank 34 contiguous these operative end surface 311, each holding tank 34 runs through the end face section 315 that this body 31 and opposite two ends all are formed at this body outer peripheral face 313, these element containing groove 35 contiguous these drive end face 312, and are formed at the radially extension inwardly of this root face section 314.This annular groove 36 is formed at this end face section 315, and these C type ring 32 covers are arranged on this annular groove 36.

This switch unit 4 comprise one rotatably cover be arranged at the switching ring 41 of this body 31, a switching spring 42 that is arranged in this element containing groove 35, and steel ball 43 that is arranged at these 42 1 outer ends of switching spring.

The outer portion 411, one that this switching ring 41 has relative this root face section 314 radially is formed at the clamping groove 414 of these 412 1 inner peripheral surfaces of push and block portion towards the push and block portion 412 of these end face section 315 extensions, four corresponding described holding tanks 34 from these outer portion 411 contiguous these ratchet unit 5 one ora terminalis, and three switching grooves 413 that are formed at 411 1 inner peripheral surfaces of this outer portion, these steel ball 43 permanent ejecting cards are formed in this switching groove 413.

This ratchet unit 5 comprises that a cover is arranged at the operative end surface 311 of this body 31 and the ratchet installed for this screwdriver head 51, two are arranged at the flexible member 52 of described holding tank 34 respectively, and is arranged at one first pallet 53 of described flexible member 52 opposite two ends, one second pallet 54, the 3rd pallet 55 and one the 4th pallet 56 respectively.

This ratchet 51 has most around being arranged at the ratchet 511 that an inner peripheral surface promotes for described pallet 53,54,55,56, and annular groove 512 that is formed at inner peripheral surface, annular groove 36 contiguous these ratchets 51 of this fixed cell 3, this C type ring 32 can be equipped in the annular groove 512 of this ratchet 51, make this, described flexible member 52 is two compression springs.

This first and second pallet 53,54 is arranged in same holding tank 34, this third and fourth pallet 55,56 is arranged in another holding tank 34,31 1 reverse perseverances in axle center of these first and third pallet, 53,55 relative these bodies eject in this body outer peripheral face 313, these second, four pallets, 54,56 relative these reverse perseverances in body 31 axle center eject in this body outer peripheral face 313, and the clamping groove 414 of this switch unit 4 stretches into for described pallet 53,54,55,56 respectively.

Consult Fig. 6, Fig. 8, Figure 10, described switching ring 41 relatively this body 31 a fixed position, a position forward, and a reverse position rotates.

Consult Fig. 6 and Fig. 7, when this switches ring 41 in this fixed position, in the switching groove 413 in the middle of this steel ball 43 is equipped in, this first, second, third and fourth pallet 53,54,55,56 stretches into respectively in the described clamping groove 414, simultaneously can limit described ratchet 511, this ratchet 51 can't be rotated with respect to this body 31, and produce the function of two-way drive.

Consult Fig. 8 and Fig. 9, when this switches ring 41 at this forward during the position, this steel ball 43 is equipped in one of them of switching groove 413 of described side, this first and third pallet 53,55 is switched ring 41 limits in described holding tank 34 by this respectively, and can't touch the ratchet 511 of this ratchet unit 5, this second, four pallet 54,56 stretches into respectively in the described clamping groove 414, limits described ratchet 511 simultaneously, make this ratchet 51 relatively this body 31 rotate along a first direction C.

Consult Figure 10 and Figure 11, when this switches ring 41 at this reverse position, this steel ball 43 is equipped in the switching groove 413 of an other side, this second, four pallet 54,56 is switched ring 41 limits in described holding tank 34 by this, and can't touch the ratchet 511 of this ratchet unit 5, this first and third pallet 53,55 stretches into respectively in the described clamping groove 414, limits described ratchet 511 simultaneously, make this ratchet 51 relatively this body 31 rotate along a second direction D, and produce the function of unidirectional drive.

This ratchet device can only not allow this screwdriver head of the two-way or unidirectional drive of user rotate, and also has following beneficial effect:

One, described pallet 53,54,55,56 is when the described ratchet 511 of restriction, when the some rotation directions of restriction, necessarily there are two pallets to limit described ratchet 511 simultaneously, therefore there is the grip abundance to make this body 31 and this ratchet 51 be difficult to take place relative displacement, can bear bigger power, therefore have the advantage of torsion abundance.

Two, when the some rotation directions of restriction, it is stressed to have two pallets simultaneously, the stressed ratio of each pallet pallet in the past reduces half, this corresponding ratchet 511 stressed also comparatively average, the abrasion of described pallet 53,54,55,56 and described ratchet 511 will reduce, and therefore long beneficial effect in service life is arranged.

Claims (5)

1. ratchet device, be applicable to for various screwdriver heads and install, this ratchet device comprises a fixed cell, a switch unit, and ratchet unit, it is characterized in that: this fixed cell comprises one along long body to extension, this body has an operative end surface, a driving end face in contrast to this operative end surface, a body outer peripheral face that connects this work, drives end face, and the holding tank of two spaces, contiguous this operative end surface of described holding tank, each holding tank runs through this body and opposite two ends all are formed at this body outer peripheral face; This switch unit comprises that is overlapped a switching ring that is arranged at this body rotatably, and this switching ring has the clamping groove that four corresponding described holding tanks are formed at an inner peripheral surface; This ratchet unit comprises that a cover is arranged at the operative end surface of this body and ratchet, two flexible members that are arranged at described holding tank respectively of installing for this screwdriver head, and be arranged at one first pallet of opposite two ends of described flexible member, second pallet, the 3rd pallet and one the 4th pallet respectively, described clamping groove stretches into for described pallet respectively, and this ratchet has most around being arranged at the ratchet that an inner peripheral surface is limited by described pallet.

2. ratchet device as claimed in claim 1, it is characterized in that: the body of this fixed cell also has one and is formed at the element containing groove that this body outer peripheral face radially extends inwardly, contiguous this of this element containing groove drives end face, this switch unit also comprises a switching spring that is arranged in this element containing groove, and steel ball that is arranged at this outer end of switching spring, this switching ring also has three switching grooves that are formed at the inner peripheral surface of this switching ring, and the permanent ejecting card of this steel ball is formed in this switching groove.

3. ratchet device as claimed in claim 1, it is characterized in that: the body of this fixed cell also has an annular groove that is formed at this body outer peripheral face and contiguous this ratchet, this ratchet also has an annular groove that is formed at inner peripheral surface, and this fixed cell comprises that also a cover is arranged on the annular groove of this body and is equipped in C type ring in the annular groove of this ratchet.

4. ratchet device as claimed in claim 2, it is characterized in that: the body outer peripheral face of this fixed cell has a root face section that connects this driving end face, footpath is wide less than this root face section and connect the end face section of this operative end surface, and this root of connection, the shoulder face section of end face section, this element containing groove is formed at this root face section, described holding tank is formed at this end face section, the switching ring of this switch unit has the outer portion of relative this root face section, and one from contiguous this ratchet unit one ora terminalis of this outer portion radially towards push and block portion that this end face section is extended, this push and block portion props up this shoulder face section, described clamping groove is formed at inner peripheral surface of this push and block portion, and described switching groove is formed at inner peripheral surface of this outer portion.

5. ratchet device as claimed in claim 1, it is characterized in that: the holding tank of this fixed cell is parallel to each other, the described flexible member of this ratchet unit is two compression springs, this first and second pallet is arranged in same holding tank, this third and fourth pallet is arranged in another holding tank, this first and third pallet reverse perseverance in axle center of this body relatively ejects in this body outer peripheral face, and this second, four pallet this reverse perseverance in body axle center relatively ejects in this body outer peripheral face.

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