CN1050646C

CN1050646C - Chuck for rock drill

Info

Publication number: CN1050646C
Application number: CN95115179A
Authority: CN
Inventors: 臧得中
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-18
Filing date: 1995-09-18
Publication date: 2000-03-22
Anticipated expiration: 2015-09-18
Also published as: CN1145976A

Abstract

The present invention discloses a rock drill chuck composed of a casing and a brake pad, wherein a brake pad positioning device is arranged in the casing. The rock drill chuck has the advantages of simple structure, easy manufacture, convenient use and safe and reliable drill pulling.

Description

Chuck for rock drill

The present invention relates to a kind of chuck for rock drill.

Must pull out the pricker operation in the hammer drill work, must be furnished with the pricker card device.The shoulder diameter of pricker is greater than bit shank and pricker body.The pricker card structure should be convenient to load and unload pricker, blocks the outer pricker body of pricker shoulder again.And pricker card present and that hammer drill is supporting all is a convertible strong elastic location pricker card, the pricker card of 7655 pusher leg drills of producing as Shenyang Pneumatic Tools Factory and the pricker card on the YT27 type hammer drill, need turn 90 degrees during the card pricker, stroke is long, operation is painstaking, the pricker card accidentally often takes place and pounds the hand accident in the workman, has only two tie points to bear pulling force on hammer drill, connect insecure and complicated integral structure, anufacturability poor.

Task of the present invention provides a kind of chuck for rock drill, its compact conformation, succinct, the easy manufacturing of connection, handling safety, quick, the firm stable of card pricker.

For finishing above-mentioned task, the solution that the present invention adopts is: a kind of chuck for rock drill, and it is made up of housing and brake lining; Have the step of cooperation, terminal pad, inner chamber, brake lining groove and spring eye on the housing; Cooperate step to cooperate, and can realize the bit shank bearing directly spacing with endoporus in the rock drilling head; Be furnished with bolt hole on the circumference of terminal pad, can pierce into bolt housing is connected with the rock drilling head; Positioner is made of briquetting, spring and the top-pressure part of the spring eye that communicates with the brake lining groove and this spring eye of packing into successively; Have on the brake lining diameter of Ka Qiankou and turnover pricker mouth, Ka Qiankou less than the diameter of the diameter of turnover pricker mouth, turnover pricker mouth equal the diameter of inner chamber, the diameter of inner chamber is a bit larger tham the pricker shoulder, can make the turnover of pricker shoulder; Brake lining groove and inner chamber axis normal, the length and width height of inner chamber should be adapted to the flexible motion of brake lining, and its axial distance of getting is a bit larger tham pricker and overwhelms back pricker shoulder by the distance of the direct in-position of card face institute; Brake lining divides spigot surface, pushing face, locating surface and stress surface; Brake lining has a shallow grooves consistent with the direction of motion of brake lining and can guarantee two dark concave surfaces of the determining deviation that turnover pricker mouth can be opened in the two edges with the contacted locating surface of briquetting, shallow grooves and two dark concave surfaces communicate; Brake lining inserts in the brake lining groove, becomes an integral body with housing, and under corresponding pushing force effect, brake lining can carry out rectilinear motion in the brake lining groove.The cooperation step of housing can be independent, but preferably with the housing one.Spring eye is two of symmetry preferably, but also desirable one.The realization of spring pressure can be a connecting bolt, also can be top-pressure part.Be pressed into a dark concave surface of brake lining when the briquetting that is subjected to elastic force after, an end of brake lining obtains spacing, has guaranteed enabling of Ka Qiankou or turnover pricker mouth simultaneously; When corresponding external force pushing acted on the other end pushing face of brake lining, briquetting can guarantee the spacing of the other end equally by being pressed into another dark concave surface from shallow grooves, and turnover pricker mouth or card pricker mouth can be enabled.

This design is compared with traditional convertible strong elastic location pricker card, has high safety performance (not hindering finger): the brake lining housing of packing into; The card pricker is quick: the brake lining line of motion is short out; Rapid operation: briquetting is little to the active force of movement parts; Firmly, pricker card globality is strong, be connected reliably with hammer drill; Stable: stress surface is that plane, briquetting are pressed into behind the dark concave surface that polarization is good, to pull out pricker distribution of forces face big and evenly directly; Good manufacturability: pricker card shape rule, and directly be connected with the hammer drill end surface, the structure of rock drilling head of having simplified standard has been improved the processing technology of rock drilling head; Pricker card compact overall structure connects succinctly, makes easily.In addition, because of the housing inner chamber in when work, be close to sealing, also can enter the housing inner chamber foremost and be unlikely to outwards to splash so the press water in the hammer drill can cool off hammer drill, thereby improve the cooling performance of hammer drill, improved operative employee's condition of labor.

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.

Phantom when accompanying drawing 1 is the present embodiment user mode.

Accompanying drawing 2 is elevations (locating surface) of present embodiment brake lining (5).

Present embodiment is made up of housing (4), brake lining (5).Cooperation step (9), terminal pad (8), inner chamber (6), brake lining groove (7) and spring eye are arranged on the housing (4).Spring eye communicates with brake lining groove (7), and the briquetting of packing into successively (3), spring (2) and top-pressure part (1) are as the positioner of brake lining (5).The length of brake lining (5) has Ka Qiankou (12) and turnover pricker mouth (13) greater than brake lining groove (7), and the diameter of Ka Qiankou (12) is less than turnover pricker mouth (13), and the diameter of turnover pricker mouth (13) equals the diameter of inner chamber (6).Brake lining (5) divides spigot surface, pushing face, locating surface and stress surface, with the contacted locating surface of briquetting (3), two edges all have a shallow grooves (11) consistent with the direction of motion of brake lining (5), and communicate with the two dark concave surfaces (10) that guarantee the determining deviation that turnover pricker mouth (13) can be opened.Brake lining (5) inserts brake lining groove (7), becomes an integral body with housing (4).

Claims

1, a kind of chuck for rock drill is characterized in that: it is made up of housing (4) and brake lining (5); Have cooperation step (9), terminal pad (8), inner chamber (6), brake lining groove (7) and spring eye on the housing (4); Cooperate step (9) to cooperate, and can realize the bit shank bearing directly spacing with endoporus in the rock drilling head; Be furnished with bolt hole on the circumference of terminal pad (8), can pierce into bolt housing (4) is connected with the rock drilling head; Positioner is made of briquetting (3), spring (2) and the top-pressure part (1) of the spring eye that communicates with brake lining groove (7) and this spring eye of packing into successively; Have on the brake lining (5) diameter of Ka Qiankou (12) and turnover pricker mouth (13), Ka Qiankou (12) less than the diameter of the diameter of turnover pricker mouth (13), turnover pricker mouth (13) equal the diameter of inner chamber (6), the diameter of inner chamber (6) is a bit larger tham the pricker shoulder, can make the turnover of pricker shoulder; Brake lining groove (7) and inner chamber (6) axis normal, the length and width height of inner chamber (6) should be adapted to the flexible motion of brake lining (5), and its axial distance of getting is a bit larger tham pricker and overwhelms back pricker shoulder by the distance of the direct in-position of card face institute; Brake lining (5) divides spigot surface, pushing face, locating surface and stress surface; Brake lining (5) has a line groove (11) consistent with the direction of motion of brake lining (5) and can guarantee two dark concave surfaces (10) of the determining deviation that turnover pricker mouth (13) can be opened in the two edges with the contacted locating surface of briquetting (3), line groove (11) and two dark concave surfaces (10) communicate; Brake lining (5) inserts in the brake lining groove (7), becomes an integral body with housing (4), and under corresponding pushing force effect, brake lining (5) can carry out rectilinear motion in brake lining groove (7).