CN204075325U - Clamping self-locking mechanism on a kind of hand fastening drill clutch - Google Patents

Abstract

The utility model discloses the clamping self-locking mechanism on a kind of hand fastening drill clutch, comprise drill body and jaw, hand-tight nut sleeve is located on drill body, described drill body is bolted with a pad, to be provided with straight up outer turns edge for described pad outer rim, and the described outer inwall that turns edge is provided with handle ratchet wheel; Bungee ring set is established and is fixed on hand-tight nut, and described bungee ring comprises the ring be set on hand-tight nut, and on described ring, circumferentially direction is provided with multiple from lock section and card-tight part, and described is arrange separately from lock section and card-tight part; Describedly comprise the steel disc A be connected with ring from lock section, described steel disc A is curved and mate with ring outer rim, is wherein provided with from locking plate in an end at steel disc A; Described card-tight part comprises the steel disc B be connected with ring, and described steel disc B is curved and mate with ring outer rim, is wherein provided with the card article near handle ratchet wheel in an end at steel disc B.Clamping self-locking mechanism of the present utility model, clamping self-locking is thorough, and sound during clamping is large, easily identifies.

Description

Clamping self-locking mechanism on a kind of hand fastening drill clutch

Technical field

The utility model relates to the clamping self-locking mechanism on a kind of hand fastening drill clutch.

Background technology

Drill chuck is as part important in electric hand drill, of a great variety, is divided into hand-tight series, light-duty spanner series, heavy spanner series and self-tightening serial.

Clamping self-locking mechanism on existing hand fastening drill clutch, it is the spring leaf of one section of arc that bungee ring wherein comprises what be set in that ring on hand-tight nut and ring outer wall turn edge downwards, described spring leaf one end is clamping sheet, the other end is from locking plate, by turning clockwise, protheca drives collar, collar (7) Timing Belt starts jack panel, hand-tight nut continues to screw, after screwing power and arriving critical point, limiting stand is crossed from locking plate, clamping sheet departs from the extruding of cam platform simultaneously, according to the unidirectional characteristic of handle ratchet wheel, clamping sheet continues to move and sends the sound of " click click " on handle ratchet wheel, now indicate that drill bit is clamped, and the irreversible and limiting stand of card article on handle ratchet wheel is to the position-limiting action from locking plate, ensure that hand-tight nut can not cause because of vibration during work loosening.

Clamping self-locking mechanism on the hand fastening drill clutch of above structure is easy to operate, locking effect is good, but in use also there is certain defect, comprise: the single clamping sheet 1) on bungee ring and in use meet the excessively sufficient electric drill of impulsive force from locking plate, final or clamping self-locking failure can be caused; 2) clamping sheet and handle ratchet wheel produce relative motion and send the sound of " click click ", indicate that drill bit is clamped, but the single clamping sheet on existing bungee ring and handle ratchet wheel produce relative motion, when meeting surrounding enviroment and being noisy, be difficult to the sound hearing " click click ".

Summary of the invention

The utility model will solve the clamping self-locking mechanism on existing hand fastening drill clutch, and clamping self-locking dynamics not and cannot determine whether the technical problem that clamped drill bit in noisy environment.

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

The utility model discloses the clamping self-locking mechanism on a kind of hand fastening drill clutch, comprise the drill body on the be connected to drill spindle that is arranged in rear cover and be located at the jaw that can vertically move guiding in the inclined hole in drill body, hand-tight nut sleeve to be located on drill body and with the threaded engagement of jaw, described drill body is bolted with a pad, pad is in the below of hand-tight nut, to be provided with straight up outer turns edge for described pad outer rim, and the described outer inwall that turns edge is provided with handle ratchet wheel; The one bungee ring set being in the upper surface that to turn edge outside pad is established and is fixed on hand-tight nut and is synchronized with the movement with it, described bungee ring outer ring is provided with protheca, described bungee ring comprises the ring be set on hand-tight nut, it is characterized in that: on described ring, circumferentially direction is provided with multiple from lock section and card-tight part, described is arrange separately from lock section and card-tight part; Describedly comprise the steel disc A be connected with ring from lock section, described steel disc A is curved and mate with ring outer rim, is wherein provided with from locking plate in an end at steel disc A; Described card-tight part comprises the steel disc B be connected with ring, and described steel disc B is curved and mate with ring outer rim, is wherein provided with the card article near handle ratchet wheel in an end at steel disc B.

Described protheca has multiple through hole with the place of coupling of bungee ring.

Described steel disc A divides equally anterior A, middle part A and rear portion A, and described anterior A is connected with ring, is arranged on rear portion A from locking plate.

Described steel disc B divides equally anterior B, middle part B and rear portion B, and described middle part B is connected with ring, and card article is arranged on rear portion B.

The technique effect that the utility model can reach is:

Compared with prior art, hand fastening drill clutch clamping self-locking mechanism of the present utility model, the ring of bungee ring is established multiple from lock section and card-tight part, ensure that the dynamics of clamping self-locking, also increase the sound of " click click " that relative motion produces between clamping sheet and handle ratchet wheel, and placement separately ensure that the uniformity of clamping self-locking dynamics;

Compared with prior art, hand fastening drill clutch clamping self-locking mechanism of the present utility model, protheca has been opened multiple through hole, the signal piping of " the click click " that send when further ensure that clamping.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the floor map of bungee ring of the present utility model;

Fig. 3 is that the K of Fig. 2 is to schematic diagram;

Fig. 4 is that the H of Fig. 2 is to schematic diagram.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:

Refer to Fig. 1, Fig. 2, the utility model provides the self-locking mechanism of the clamping on a kind of hand fastening drill clutch, comprise the drill body 1 on the be connected to drill spindle that is arranged in rear cover 10 and be located at the jaw 2 that can vertically move guiding in the inclined hole in drill body 1, hand-tight nut 5 to be set on drill body 1 and with the threaded engagement of jaw 2, described drill body 1 is bolted with a pad 3, pad 3 is in the below of hand-tight nut 5, to be provided with straight up outer turns edge for described pad 3 outer rim, and the described outer inwall that turns edge is provided with handle ratchet wheel; One is in that the bungee ring 6 of the upper surface that to turn edge outside pad 3 is sheathed to be fixed on hand-tight nut 5 and to be synchronized with the movement with it, described bungee ring 6 outer ring is provided with protheca 8, described bungee ring 6 comprises the ring 11 be set on hand-tight nut 5, on described ring 11, circumferentially direction is provided with multiple from lock section 12 and card-tight part 13, and described is arrange separately from lock section 12 and card-tight part 13; Describedly comprise the steel disc A14 be connected with ring 11 from lock section 12, described steel disc A14 is curved and mate with ring 11 outer rim, is wherein provided with from locking plate 16 in an end at steel disc A14; Described card-tight part 13 comprises the steel disc B15 be connected with ring 11, and described steel disc B15 is curved and mate with ring 11 outer rim, is wherein provided with the card article 17 near handle ratchet wheel in an end at steel disc B15.

Described protheca has multiple through hole with the place of coupling of bungee ring.Described through hole facilitates spreading out of of " click click " sound that card article and handle ratchet wheel produce, and gives user and points out more clearly.

Described protheca 8 inwall be provided with card pressure card article with from the cam platform of locking plate and limiting stand.

Refer to Fig. 3, described steel disc A14 divides equally anterior A18, middle part A19 and rear portion A20, and described anterior A18 is connected with ring 11, is arranged on rear portion A20 from locking plate 16.The structure that this only anterior A18 is connected with ring 11, improves the elasticity from lock section 12 to a greater extent, adds its service life.

Refer to Fig. 4, described steel disc B15 divides equally anterior B21, middle part B22 and rear portion B23, and described middle part B22 is connected with ring 11, and card article 17 is arranged on rear portion B23.The structure that this only middle part B22 is connected with ring 11, enhances the rigidity of rear portion B23, makes card article 17 sound that relative motion produces on handle ratchet wheel louder.

The operation principle of hand fastening drill clutch of the present utility model is as follows:

Be rotated counterclockwise protheca 8, three jaws 2 are opened, insert required drill bit, now, card article 17 on card-tight part 13 is on the cam platform of protheca 8, extrude by it, card article 17 is separated with handle ratchet wheel, the protheca 8 that turns clockwise afterwards drives hand-tight nut 5 to continue to screw, after screwing power and arriving critical point, limiting stand cross from lock section 12 from locking plate 16, card article 17 departs from the extruding of cam platform simultaneously, according to the unidirectional characteristic of handle ratchet wheel, card article 17 continues to move and sends the sound of " click click " on handle ratchet wheel, now indicate that drill bit is clamped, and the irreversible and limiting stand of card article 17 on handle ratchet wheel is to the position-limiting action from locking plate 16, ensure that hand-tight nut 5 can not cause because of vibration during work loosening, needs more bit change time, be rotated counterclockwise protheca 8, be subject to the unidirectional characteristic of handle ratchet wheel, bungee ring 6 is stuck motionless, and the limiting stand of protheca 8 climbs over from locking plate 16, the card article 17 of cam platform extruding simultaneously, card article 17 is separated with handle ratchet wheel, now, hand-tight nut 5 can easily be unclamped by rotation by protheca 8.

Clamping self-locking mechanism on a kind of hand fastening drill clutch provided the utility model embodiment is above described in detail, apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment is just for helping to understand the technical scheme that the utility model discloses; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims (4)

1. the clamping self-locking mechanism on a hand fastening drill clutch, comprise the drill body on the be connected to drill spindle that is arranged in rear cover and be located at the jaw that can vertically move guiding in the inclined hole in drill body, hand-tight nut sleeve to be located on drill body and with the threaded engagement of jaw, described drill body is bolted with a pad, pad is in the below of hand-tight nut, to be provided with straight up outer turns edge for described pad outer rim, and the described outer inwall that turns edge is provided with handle ratchet wheel; The one bungee ring set being in the upper surface that to turn edge outside pad is established and is fixed on hand-tight nut and is synchronized with the movement with it, described bungee ring outer ring is provided with protheca, described bungee ring comprises the ring be set on hand-tight nut, it is characterized in that: on described ring, circumferentially direction is provided with multiple from lock section and card-tight part, described is arrange separately from lock section and card-tight part; Describedly comprise the steel disc A be connected with ring from lock section, described steel disc A is curved and mate with ring outer rim, is wherein provided with from locking plate in an end at steel disc A; Described card-tight part comprises the steel disc B be connected with ring, and described steel disc B is curved and mate with ring outer rim, is wherein provided with the card article near handle ratchet wheel in an end at steel disc B.

2. the clamping self-locking mechanism on a kind of hand fastening drill clutch according to claim 1, is characterized in that: described protheca has multiple through hole with the place of coupling of bungee ring.

3. the clamping self-locking mechanism on a kind of hand fastening drill clutch according to claim 1, is characterized in that: described steel disc A divides equally anterior A, middle part A and rear portion A, and described anterior A is connected with ring, is arranged on rear portion A from locking plate.

4. the clamping self-locking mechanism on a kind of hand fastening drill clutch according to claim 1, is characterized in that: described steel disc B divides equally anterior B, middle part B and rear portion B, and described middle part B is connected with ring, and card article is arranged on rear portion B.