Electric pick connecting structure capable of quickly replacing drill bit

Abstract

The utility model discloses an electric pick connecting structure capable of quickly replacing a drill bit, which comprises an inner sleeve, a clamping bead capable of being contacted with the drill bit is movably arranged on the inner sleeve, an outer sleeve and a blocking piece are arranged on the surface of the inner sleeve up and down, the outer sleeve can restrain the clamping bead, and the blocking piece is used for limiting the outer sleeve; the outer sleeve is unlocked by turning over and opening the blocking piece, then the outer sleeve slides downwards till the clamping ball loses constraint to the maximum extent, and at the moment, the drill bit can be detached from the inner sleeve; the drill bit can be assembled in the inner sleeve by reversely operating the steps, the whole disassembling and assembling process is simple and convenient, and the effect of rapidly replacing the drill bit is achieved; meanwhile, the structure is simple, a spring is not needed, the problem that the elastic deformation of the spring is unstable after the spring is used for a long time is solved, the fixing stability of the drill bit is guaranteed, space and parts are saved, and therefore the use cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric pick technology field especially relates to a quick replaceable electric pick connecting structure of drill bit. BACKGROUND

[0002] Electric pick is a double insulation handheld electric tool powered by single-phase series motor, which is safe and reliable, high in efficiency and convenient to operate, and is widely used in pipeline laying, mechanical installation, water supply and drainage facility construction, indoor decoration, port facility construction and other construction engineering construction, and is suitable for pick or other appropriate accessories, such as chisel, shovel and the like, to carry out crushing, chiseling, excavating, grooving and cutting on concrete, masonry structure and asphalt pavement.

[0003] The patent document with the announcement number CN208100282U discloses a clamping mechanism of electric pick working head, which drives the limiting mechanism to extrude the second extrusion block through the rotation of the outer sleeve, so as to fix the electric pick head, makes the fixing of the electric pick head more convenient, saves the time wasted in dismounting and replacing, and the setting of the first clamping block and the second clamping block on one side of the extrusion plate can fix electric pick heads of different sizes, improves the applicability of the device, and improves the fixing effect in cooperation with the clamping groove, and prevents the electric pick head from slipping during the work of the electric pick.

[0004] Although the above-mentioned clamping mechanism of electric pick working head can solve the corresponding technical problems, the elastic deformation of the extrusion spring and the return spring is unstable after long-term use, so it is difficult to achieve the stable fixing requirement of the electric pick head by only relying on the extrusion of the extrusion spring and the return spring.

[0005] Therefore, a quick replaceable electric pick connecting structure of drill bit is proposed. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a quick replaceable electric pick connecting structure of drill bit, which is used to solve the problems proposed in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme including:

[0008] A quick replaceable electric pick connecting structure of drill bit includes:

[0009] An inner sleeve movably provided with a clamping bead capable of contacting with the drill bit, the surface of the inner sleeve is provided with an outer sleeve and a blocking piece from top to bottom, the outer sleeve can constrain the clamping bead, and the blocking piece is used to limit the outer sleeve;

[0010] Among them, the clamping bead is annularly and equidistantly distributed with a plurality of clamping beads on the inner sleeve, the clamping bead and the clamping groove on the drill bit are one-to-one corresponding, and the clamping bead is clamped into the inner cavity of the corresponding clamping groove.

[0011] The outer sleeve comprises a sleeve E movably arranged on the surface of the inner sleeve, the bottom end of the sleeve E is integrally formed with a sleeve F, the upper part of the inner wall surface of the sleeve E is provided with a circular truncated cone groove, and the inner wall surface of the circular truncated cone groove is in contact with the clamping bead.

[0012] As a preferred technical scheme, the inner sleeve comprises a sleeve A, a sleeve B, a sleeve C and a sleeve D which are sequentially and communicatively arranged from top to bottom, the sleeve B is provided with a through groove for the clamping bead to pass through, the top end of the sleeve E is in contact with the sleeve A, the inner wall surface of the sleeve E is in sliding connection with the outer surface of the sleeve B, the bottom end of the sleeve F extends to the outer surface of the sleeve C and is in sliding connection with the outer surface of the sleeve C, and the blocking piece is arranged on the surface of the sleeve C.

[0013] As a preferred technical scheme, the outer surface of the inner sleeve is integrally formed with a mounting plate, and mounting holes are arranged at the four corners of the surface of the mounting plate.

[0014] As a preferred technical scheme, the opening diameter of the through groove towards the inner cavity of the sleeve B is smaller than the diameter of the clamping bead.

[0015] As a preferred technical scheme, the blocking piece comprises two blocking sleeves clamped on the surface of the sleeve C, the blocking sleeves are in a semi-ring structure, and the blocking sleeves are located between the sleeve F and the sleeve D.

[0016] As a preferred technical scheme, the top and the bottom of the blocking sleeve are fixedly connected with rubber pads, the top of the rubber pad located above is in contact with the sleeve F, and the bottom of the rubber pad located below is in contact with the sleeve D.

[0017] As a preferred technical scheme, one end of the outer surface of the two blocking sleeves is fixedly connected with a convex column respectively, the two convex columns are arranged in an up-down mode, the outer surface of the sleeve D is fixedly connected with a support, the top of the support is in contact with the bottom of the adjacent convex column, and the two convex columns and the support are rotationally connected.

[0018] As a preferred technical scheme, one end of the outer surface of the two blocking sleeves away from the convex column is fixedly connected with a convex block respectively, and the length of one of the convex blocks is greater than that of the other convex block.

[0019] The utility model at least has the following beneficial effects:

[0020] The application realizes the unlocking operation of the outer sleeve by turning over the blocking piece, and then the outer sleeve is slid downward until the maximum limit, so that the clamping bead loses the constraint, at this time the drill bit can be disassembled from the inner sleeve; the above steps are reversed to assemble the drill bit in the inner sleeve, the whole disassembly and assembly process is simple and convenient, the effect of quickly replacing the drill bit is realized; meanwhile, the structure is simple, without using spring, avoiding the problem of unstable elastic deformation of the spring after long time use, ensuring the fixing stability of the drill bit, saving space and parts, and reducing the use cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the electric grab connection structure and the drill bit in the assembly state of the electric grab connection structure capable of quickly replacing the drill bit of the utility model;

[0022] Figure 2 It is a structure cross-sectional view of the electric grab connection structure capable of quickly replacing the drill bit of the utility model;

[0023] Figure 3 It is a structure cross-sectional view of the electric grab connection structure capable of quickly replacing the drill bit of the utility model;

[0024] Figure 4 It is a structure schematic view of the blocking piece of the electric grab connection structure capable of quickly replacing the drill bit of the utility model in the open state.

[0025] In the drawing: 1, drill bit; 2, clamping groove; 100, inner sleeve; 110, sleeve A; 111, mounting plate; 112, mounting hole; 120, sleeve B; 121, through groove; 130, sleeve C; 140, sleeve D; 141, support; 200, clamping bead; 300, outer sleeve; 310, sleeve E; 311, circular table groove; 312, convex ring; 320, sleeve F; 400, blocking piece; 410, blocking sleeve; 420, rubber pad; 430, convex column; 440, convex block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Please refer to Figures 1-4The utility model discloses an electric grab connection structure of quick replacement drill bit, including inner sleeve 100, the movable contact of card bead 200 who can with drill bit 1 is established on it, the surface of inner sleeve 100 is provided with outer sleeve 300 and blocking piece 400 in up and down, outer sleeve 300 can constrain card bead 200, and blocking piece 400 is used for limiting outer sleeve 300, card bead 200 is annular equidistance distribution with a plurality on inner sleeve 100, and card bead 200 and the card slot 2 on drill bit 1 are set up one to one, and card bead 200 is clamped to the inner chamber of corresponding card slot 2, outer sleeve 300 includes the sleeve pipe E310 of movable setting in the surface of inner sleeve 100, and the bottom of sleeve pipe E310 is integrally formed with sleeve pipe F320, and the upper portion of the inner wall surface of sleeve pipe E310 is equipped with circular table groove 311, and the top surface diameter size of circular table groove 311 is greater than its bottom surface diameter size, and the inner wall surface of circular table groove 311 contacts with card bead 200, and the surface of sleeve pipe E310 is integrally formed with several convex rings 312 that are equidistance distribution in up and down, and the friction with the surface of sleeve pipe E310 can be increased through convex ring 312, and the antiskid effect is played.

[0028] Wherein, inner sleeve 100 includes sleeve pipe A110, sleeve pipe B120, sleeve pipe C130 and sleeve pipe D140 that are sequentially communicated from top to bottom, sleeve pipe B120 is provided with through groove 121 for card bead 200 to pass through, top end of sleeve pipe E310 contacts with sleeve pipe A110, inner wall surface of sleeve pipe E310 is connected with the outer surface of sleeve pipe B120 slidingly, bottom end of sleeve pipe F320 extends to the outer surface of sleeve pipe C130 and is connected with the outer surface of sleeve pipe C130 slidingly, blocking piece 400 is arranged on the surface of sleeve pipe C130, through inner sleeve 100, drill bit 1, card bead 200, outer sleeve 300 and blocking piece 400 can be provided with installation base, and drill bit 1 can be preliminarily limited.

[0029] Wherein, the outer surface of inner sleeve 100 is integrally formed with mounting plate 111, mounting holes 112 are arranged at the four corners of the surface of mounting plate 111, by passing through mounting hole 112 with screw, inner sleeve 100 can be connected with the shell of electric grab, to realize the detachable connection between inner sleeve 100 and the shell of electric grab, which is convenient for subsequent maintenance operation.

[0030] Wherein, the opening diameter size of through groove 121 towards the inner cavity of sleeve pipe B120 is less than the diameter size of card bead 200, by using the diameter difference, the phenomenon that card bead 200 moves excessively towards the inner cavity of sleeve pipe B120 and falls off or even loses can be effectively avoided, to ensure that drill bit 1 can be fixed subsequently.

[0031] The blocking component 400 includes two retaining sleeves 410 that engage with the surface of the sleeve C130. The retaining sleeves 410 have a semi-annular structure and are located between the sleeve F320 and the sleeve D140. Through the cooperation of the retaining sleeves 410 and the sleeve A110, the outer sleeve 300 can be restricted, so that the outer sleeve 300 is stably kept in the locked state.

[0032] The top and bottom of the retaining sleeve 410 are fixedly connected with rubber pads 420. The top of the upper rubber pad 420 contacts the sleeve F320, and the bottom of the lower rubber pad 420 contacts the sleeve D140. The rubber pads 420 can increase the friction between the sleeve F320 and the retaining sleeve 410, and between the sleeve D140 and the retaining sleeve 410, so as to improve the stability of the retaining sleeve 410 between the sleeve F320 and the sleeve D140 and prevent the retaining sleeve 410 from vibrating and loosening during the operation of the electric hammer.

[0033] One end of each of the two retaining sleeves 410 is fixedly connected to a protrusion 430, which is arranged vertically. A support 141 is fixedly connected to the outer surface of the sleeve D140. The top of the support 141 contacts the bottom of the adjacent protrusion 430. The two protrusions 430 and the support 141 are rotatably connected by a pivot. Through the cooperation of the protrusions 430, the support 141 and the pivot, the retaining sleeve 410 and the sleeve D140 can be movably connected. This avoids the separation of the blocking part 400 from the inner sleeve 100 during disassembly, which could easily lead to the loss of parts. This allows the two retaining sleeves 410 to be flipped and locked and opened. When locked, the outer sleeve 300 can be restricted. When opened, the outer sleeve 300 can be unlocked. The outer diameter of the retaining sleeve 410 is the same as that of the sleeve F320, so that the retaining sleeve 410 can be completely detached from the bottom of the outer sleeve 300 after rotating 180 degrees.

[0034] One of the two retainers 410 has a protrusion 440 fixedly connected to the end of its outer surface away from the protrusion 430. The protrusion 440 allows the user to easily move the retainer 410 by hand. The length of one protrusion 440 is greater than that of the other protrusion 440. By utilizing the length difference, the user can easily move the retainers 410 in sequence.

[0035] The working principle of the utility model is: through the knob 440 stirs the baffle sleeve 410, makes the knob 440 drive baffle sleeve 410, rubber pad 420 and convex column 430 with the pivot as the center of circle overturning open, until baffle sleeve 410 and rubber pad 420 rotate one hundred and eighty degrees, make baffle sleeve 410 and rubber pad 420 completely separate from the bottom end of outer sleeve 300, to realize the unlocking operation of outer sleeve 300, then the sleeve pipe E310 is slid down, until the maximum limit, make the card bead 200 lose the restraint, at this moment can take the drill bit 1 down, make the drill bit 1 drive the clamping groove 2 to move, the inner wall surface of clamping groove 2 carries out the pressure to card bead 200, make card bead 200 in the inner chamber activity of through slot 121, until card bead 200 separates from the inner chamber of clamping groove 2, then continue to take the drill bit 1, make the drill bit 1 from the inner chamber of inner sleeve 100 completely remove, can complete the disassembly operation of drill bit 1, contrary, reverse operation above-mentioned step, can assemble the drill bit 1 of replacement to the inner chamber of drill bit 1.

[0036] The parts not involved in the utility model are the same as the prior art or can be realized by using the prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-change drill bit connection structure for an electric pick, characterized in that, The application relates to a drill bit (1) locking device. The device comprises an inner sleeve (100) with clamping beads (200) capable of contacting the drill bit (1), the surface of the inner sleeve (100) being provided with an outer sleeve (300) and a blocking piece (400) from top to bottom, the outer sleeve (300) being capable of restraining the clamping beads (200), and the blocking piece (400) being used for limiting the outer sleeve (300). The clamping beads (200) are annularly and equidistantly distributed on the inner sleeve (100), the clamping beads (200) and clamping grooves (2) on the drill bit (1) are one-to-one correspondingly arranged, and the clamping beads (200) are clamped into the inner cavities of the corresponding clamping grooves (2). The outer sleeve (300) comprises a sleeve E (310) movably arranged on the surface of the inner sleeve (100), the bottom end of the sleeve E (310) is integrally formed with a sleeve F (320), the upper portion of the inner wall surface of the sleeve E (310) is provided with a circular truncated cone groove (311), and the inner wall surface of the circular truncated cone groove (311) is in contact with the clamping beads (200).

2. The quick-change bit coupler of claim 1, wherein: The inner sleeve (100) comprises a sleeve A (110), a sleeve B (120), a sleeve C (130) and a sleeve D (140) sequentially and communicatively arranged from top to bottom, the sleeve B (120) is provided with a through groove (121) for the clamping beads (200) to pass through, the top end of the sleeve E (310) is in contact with the sleeve A (110), the inner wall surface of the sleeve E (310) is in sliding connection with the outer surface of the sleeve B (120), the bottom end of the sleeve F (320) extends to the outer surface of the sleeve C (130) and is in sliding connection with the outer surface of the sleeve C (130), and the blocking piece (400) is arranged on the surface of the sleeve C (130).

3. The quick-change bit coupler of claim 2, wherein: The outer surface of the inner sleeve (100) is integrally formed with a mounting plate (111), and mounting holes (112) are formed at the four corners of the surface of the mounting plate (111).

4. The quick-change bit coupler of claim 2, wherein: The opening diameter of the through groove (121) towards the inner cavity of the sleeve B (120) is smaller than the diameter of the clamping beads (200).

5. The quick-change bit coupler of claim 2, wherein: The blocking piece (400) comprises two blocking sleeves (410) clamped on the surface of the sleeve C (130), the blocking sleeves (410) are in a semi-annular structure, and the blocking sleeves (410) are located between the sleeve F (320) and the sleeve D (140).

6. The quick-change bit coupler of claim 5, wherein: The top and bottom of each of the blocking sleeves (410) is fixedly connected with a rubber pad (420), the top of the rubber pad (420) located at the top is in contact with the sleeve F (320), and the bottom of the rubber pad (420) located at the bottom is in contact with the sleeve D (140).

7. The quick-change bit coupler of claim 5, wherein: One end of the outer surface of each of the blocking sleeves (410) is fixedly connected with a convex column (430), the two convex columns (430) are arranged in a top-to-bottom mode, the outer surface of the sleeve D (140) is fixedly connected with a support (141), the top of the support (141) is in contact with the bottom of the convex column (430) adjacent to the support (141), and the two convex columns (430) and the support (141) are in rotary connection.

8. The quick-change bit coupler of claim 7, wherein: Two outer surfaces of the baffle sleeves (410) are respectively fixedly connected with a protrusion (440) away from one end of the protrusion column (430), and the length of one of the protrusions (440) is greater than that of the other protrusion (440).

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