Five-pit chisel

Abstract

The utility model relates to the technical field of chisels, and discloses a five-pit chisel which comprises a shovel base, an inner cavity is formed in the rear side of the interior of the shovel base, a rotating rod is rotationally connected to the upper middle portion of the inner side of the inner cavity, a pawl is fixedly connected to the middle of the outer side of the rotating rod, and a connecting column is fixedly connected to the front side of the top of the pawl. A transmission rod is rotatably connected to the middle of the inner side of the inner cavity, a ratchet wheel is fixedly connected to the middle of the outer side of the transmission rod and is in meshed connection with the pawl, horizontal gears are fixedly connected to the left side and the right side of the outer wall of the transmission rod, a shovel head is arranged at the bottom of the shovel base, and racks are fixedly connected to the left side and the right side of the rear wall of the shovel head. According to the utility model, the ratchet wheel does not limit the rotation of the transmission rod, the shovel head drives the rack to move forwards, the gear is meshed with the rack and the transmission rod is not limited any more, so that the gear rotates along with the gear, and when the rack is completely pulled out of the inner cavity, the shovel head can be detached.

Description

TECHNICAL FIELD

[0001] The utility model relates to dental implant technology field especially relates to five pit chisel. BACKGROUND

[0002] Five pit chisel is a kind of tool, its head has special five pit design, mainly used to and corresponding electric tool are adapted to connect, can the surface of the concrete after pouring is trimmed, such as removing the part of excess, make the surface of wall surface and column structure reach ideal flatness.

[0003] Through the retrieval, China patent publication No. CN221742110U discloses a kind of five pit spade chisel of reducing use cost, including spade chisel rod and spade head seat, spade chisel rod and spade head seat are integrally processed, the end of spade chisel rod away from spade head seat is equipped with clamping groove, spade head seat upper end and lower end are equipped with first inclined plane and second inclined plane respectively, first inclined plane and second inclined plane are arranged with the included angle less than degree, recess is equipped in the middle of spade head seat, recess side is equipped with inwardly inclined chamfer face, the application can be replaced by setting spade head assembly on spade chisel, after producing wear in the use process of spade head, by replacing spade head, the use effect of spade chisel can be guaranteed, use cost is reduced;And the rib of interval is arranged below spade head, can reduce the contact friction in the use process of spade chisel, to reduce the local wear of spade chisel, further provide the service life of spade chisel, but the device in the process of actual use, since spade head and spade chisel part are connected using bolt, when needing to replace spade head, user needs to use matched tool to first disassemble screw to be able to disassemble spade head, disassembly and replacement work is more troublesome, increase the work burden of staff, cannot satisfy the demand of user. UTILITARY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides five pit chisel, aims at improving the problem that five pit chisel in prior art is inconvenient to disassemble quickly when replacing spade head.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: five pits chisel, including the shovel seat, the inside rear side of shovel seat is provided with the inner chamber, the inner side middle part of inner chamber is rotatably connected with the rotating lever, the outside middle part of rotating lever is fixedly connected with the pawl, the top front side of pawl is fixedly connected with the connecting column, the top rear side of pawl is fixedly connected with the spring, the top of spring is fixedly connected with the inner chamber, the inner side middle part of inner chamber is rotatably connected with the transmission rod, the outside middle part of transmission rod is fixedly connected with the ratchet wheel, the ratchet wheel is engaged with pawl, the outer wall left and right sides of transmission rod are all fixedly connected with the flat gear, the front end left and right sides of the inner chamber of shovel seat are all provided with the window, the bottom of shovel seat is provided with the shovel head, the rear wall left and right sides of shovel head are all fixedly connected with the rack, the rear end of two rack is respectively penetrated through the corresponding window, the upper side of two rack is respectively engaged with the corresponding flat gear, the rear side middle part of shovel seat is fixedly connected with the telescopic mechanism, and the telescopic mechanism is used for conveniently increasing the length of the device.

[0006] Through the above technical scheme, the ratchet wheel and the pawl can be disengaged by pulling the connecting column, so that the shovel head is removed from the shovel seat, the shovel head is replaced, the work burden of the staff is reduced, and the needs of the user can be met.

[0007] As a further description of the above technical scheme:

[0008] The telescopic mechanism includes a fixed rod, the fixed rod is fixedly connected to the rear middle part of the shovel seat, the rear end of the fixed rod is provided with a shovel handle, the front side of the shovel handle is provided with a circular hole, the top rear side of the shovel handle is rotatably connected with a transmission column, the bottom end of the transmission column penetrates the shovel handle and is fixedly connected with a driving bevel gear, the inner rear end of the circular hole is rotatably connected with a threaded rod, the rear side of the outer wall of the threaded rod is fixedly connected with a driven bevel gear, the driven bevel gear is engaged with the driving bevel gear, the outer side of the threaded rod is threadedly connected with a threaded sleeve, and the front end of the threaded sleeve is fixedly connected with the fixed rod.

[0009] Through the above technical scheme, rotating the transmission column can drive the threaded rod to rotate, thereby controlling the extension and shortening of the device, making the use of the device in some scenarios more convenient, and improving the practicability of the five-pit chisel.

[0010] As a further description of the above technical scheme:

[0011] The inner upper and lower sides of the circular hole are all fixedly connected with a sliding block, the upper and lower sides of the threaded sleeve are all provided with a sliding groove, and the inner sides of the two sliding grooves are respectively slidably connected with the corresponding sliding blocks.

[0012] Through the above technical scheme, the mutual sliding of the sliding groove and the sliding block enables the threaded sleeve to move accurately along the direction of the sliding block.

[0013] As a further description of the above technical solutions:

[0014] The top end of the transmission column is fixedly connected with a rotating handle, and the internal size of the circular hole is matched with the size of the threaded sleeve.

[0015] Through the above technical solutions, the rotating handle can make the staff more conveniently rotate the transmission column, and the internal size of the circular hole is matched with the size of the threaded sleeve, so that dust and sundries cannot enter the inside of the circular hole from the gap.

[0016] As a further description of the above technical solutions:

[0017] The top end of the connecting column penetrates through the shovel seat and is fixedly connected with a pull ring, and the bottom size of the shovel seat is matched with the size of the shovel head.

[0018] Through the above technical solutions, the pull ring can conveniently make the staff pull the connecting column, and the bottom size of the shovel seat is matched with the size of the shovel head, so that sundries cannot enter between the shovel seat and the shovel head when the device is used.

[0019] As a further description of the above technical solutions:

[0020] A plurality of mounting grooves are equidistantly arranged around the rear side of the outer wall of the shovel handle, and transition inclined surfaces are arranged on the upper and lower sides of the fixed rod.

[0021] Through the above technical solutions, the mounting grooves provide positioning and fixing for the installation of the device, and the transition inclined surfaces make the device more beautiful.

[0022] As a further description of the above technical solutions:

[0023] A second guard plate is fixedly connected to the inside bottom of the shovel head, and a first guard plate is fixedly connected to the front end of the bottom of the shovel head.

[0024] Through the above technical solutions, the first guard plate and the second guard plate are made of a strong alloy, which provides additional protection for the shovel head.

[0025] As a further description of the above technical solutions:

[0026] Limiting blocks are fixedly connected to the left and right sides of the rear end of the shovel head, limiting grooves are arranged on the left and right sides of the front end of the bottom of the shovel seat, and the interiors of the two limiting grooves are respectively and slidably connected with the corresponding limiting blocks.

[0027] Through the above technical solutions, the limiting grooves and the limiting blocks provide positioning for the installation of the shovel head, so that it is easy to align during installation.

[0028] The utility model has the following beneficial effects:

[0029] 1、the utility model discloses, pull connection column, and the connecting column drives the pawl rotation, at this moment, the pawl will separate from the meshing state with the ratchet wheel, and the ratchet wheel no longer restricts the rotation of the transmission rod, at this moment, pull the shovel head, and the rack is moved forward with it, because the gear and the rack are mutually engaged and the transmission rod is no longer restricted, at this moment, the gear rotates, when the rack is completely pulled out the inner chamber, can dismantle the shovel head, and the dismounting and installation work are very convenient, reduce the work burden of staff, can satisfy the demand of user.

[0030] 2、the utility model discloses, rotate transmission column, and the transmission column rotation will drive the driving bevel gear rotation, and the driving bevel gear and driven bevel gear are mutually engaged, at this moment, the driven bevel gear will drive the threaded rod rotation with it, and the threaded sleeve will drive the fixed rod forward with it when the threaded rod rotates, at this moment, the shovel base will move with the movement of fixed rod and can be lengthened the length of the device, improve the practicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the perspective drawing of five pit chisel that the utility model proposes;

[0032] Figure 2 It is the shovel base structure section view of five pit chisel that the utility model proposes;

[0033] Figure 3 It is the local structure split drawing of five pit chisel that the utility model proposes;

[0034] Figure 4 It is the local structure section view of five pit chisel that the utility model proposes;

[0035] Figure 5 It is the structure split drawing of telescopic mechanism of five pit chisel that the utility model proposes.

[0036] LEGEND:

[0037] 1, shovel base;2, telescopic mechanism;201, fixed rod;202, shovel handle;203, round hole;204, transmission column;205, driving bevel gear;206, threaded rod;207, driven bevel gear;208, threaded sleeve;3, inner chamber;4, rotating rod;5, pawl;6, connection column;7, spring;8, transmission rod;9, ratchet wheel;10, spur gear;11, window;12, shovel head;13, rack;14, sliding block;15, sliding slot;16, rotating handle;17, pull ring;18, installation slot;19, first baffle;20, second baffle;21, limit block;22, limit slot;23, transition inclined surface. DETAILED DESCRIPTION

[0038] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0039] With reference to Figure 1 , Figure 2 and Figure 3 , the present application provides an embodiment: five pit chisel, including shovel seat 1, the inside rear side of shovel seat 1 is provided with inner cavity 3, the inner side middle upper portion of inner cavity 3 is rotatably connected with rotating rod 4, the outer side middle portion of rotating rod 4 is fixedly connected with pawl 5, the top front side of pawl 5 is fixedly connected with connecting column 6, the top rear side of pawl 5 is fixedly connected with spring 7, the top end of spring 7 is fixedly connected with the top of inner cavity 3, the inner side middle portion of inner cavity 3 is rotatably connected with transmission rod 8, the outer side middle portion of transmission rod 8 is fixedly connected with ratchet wheel 9, ratchet wheel 9 is engagedly connected with pawl 5, the outer wall left and right sides of transmission rod 8 are fixedly connected with flat gear 10, the front end left and right sides of the inner cavity 3 of shovel seat 1 are provided with window 11, the bottom of shovel seat 1 is provided with shovel head 12, the rear wall left and right sides of shovel head 12 are fixedly connected with rack 13, the rear end of two racks 13 respectively penetrates corresponding window 11, the upper side of two racks 13 is respectively engagedly connected with corresponding flat gear 10, the middle portion of the rear side of shovel seat 1 is fixedly connected with telescopic mechanism 2, telescopic mechanism 2 is used for conveniently increasing the length of the device, the top end of connecting column 6 penetrates shovel seat 1 and is fixedly connected with pull ring 17, the bottom size of shovel seat 1 is matched with the size of shovel head 12.

[0040] Specifically, in the process of using the device, if it is necessary to replace the shovel head 12, first pull the pull ring 17, when the pull ring 17 is pulled, the connecting column 6 will move upwards, when the connecting column 6 moves upwards, the pawl 5 will be further driven to rotate upwards, at this time, the pawl 5 will be disengaged from the engagement state with the ratchet wheel 9, so that the ratchet wheel 9 no longer restricts the rotation of the transmission rod 8, when pulling the shovel head 12, the shovel head 12 will drive the two racks 13 behind it to move forward, because the spur gear 10 and the rack 13 are in meshing relationship with each other, and the transmission rod 8 is no longer restricted by the ratchet wheel 9, the rack 13 will drive the spur gear 10 to rotate during movement, when the rack 13 is pulled out of the inner cavity 3, the shovel head 12 can be smoothly disassembled, and when installing a new shovel head 12, only need to push the shovel head 12 backward, through the interaction between the ratchet wheel 9 and the pawl 5, the shovel head 12 can be fixed in the appropriate position, at the same time, through the action force of the spring 7, it can ensure that the pawl 5 always meshes with the ratchet wheel 9, so as to ensure that the fixation of the shovel head 12 will not fall off, the whole disassembly and installation process is very convenient, reduces the work burden of the staff, and can meet the needs of the user.

[0041] With reference to Figure 1 , Figure 4 and Figure 5 , the telescopic mechanism 2 comprises a fixed rod 201 fixedly connected to the rear middle part of the shovel base 1, the rear end of the fixed rod 201 is provided with a shovel handle 202, the front side of the shovel handle 202 is provided with a circular hole 203, the top rear side of the shovel handle 202 is rotatably connected with a transmission column 204, the bottom end of the transmission column 204 penetrates through the shovel handle 202 and is fixedly connected with a driving bevel gear 205, the inner rear end of the circular hole 203 is rotatably connected with a threaded rod 206, the outer wall rear side of the threaded rod 206 is fixedly connected with a driven bevel gear 207, the driven bevel gear 207 is meshingly connected with the driving bevel gear 205, the outer side of the threaded rod 206 is threadedly connected with a threaded sleeve 208, the front end of the threaded sleeve 208 is fixedly connected with the fixed rod 201, the inner upper and lower sides of the circular hole 203 are fixedly connected with sliding blocks 14, the upper and lower sides of the threaded sleeve 208 are provided with sliding grooves 15, the inner sides of the two sliding grooves 15 are respectively slidably connected with the corresponding sliding blocks 14;

[0042] Specifically, in the process of operating the device, if it is necessary to increase the length of the five-pit chisel, the transmission column 204 can be rotated first. During rotation, the transmission column 204 drives the driving bevel gear 205 to rotate. Since the driving bevel gear 205 and the driven bevel gear 207 are in meshing relationship with each other, when the driving bevel gear 205 starts to rotate, the driven bevel gear 207 drives the threaded rod 206 to rotate. At the same time, the threaded sleeve 208 moves forward along the sliding groove 15 when the threaded rod 206 rotates due to the limiting action of the sliding groove 15 and the sliding block 14. With the forward movement of the threaded sleeve 208, the fixed rod 201 moves forward, which pushes the shovel seat 1 to move forward, so that the length of the device can be increased, thereby improving the adaptability of the five-pit chisel under various conditions and improving the practicality of the device.

[0043] With reference to Figure 1 , Figure 4 and Figure 5 , the top end of the transmission column 204 is fixedly connected with a rotating handle 16, the inner size of the circular hole 203 matches the size of the threaded sleeve 208, a plurality of installation grooves 18 are equidistantly arranged around the rear side of the outer wall of the shovel handle 202, and transition inclined surfaces 23 are arranged on the upper and lower sides of the fixed rod 201;

[0044] Specifically, the rotating handle 16 is more convenient for the staff to rotate the transmission column 204, and the inner size of the circular hole 203 matches the size of the threaded sleeve 208, which ensures the smoothness of the sliding of the threaded sleeve 208 and the firmness of the fixation. The installation grooves 18 can be used to install the device on a power tool, and the transition inclined surfaces 23 can be used to place the device in a gap.

[0045] With reference to Figure 1 and Figure 3 , the inner bottom of the shovel head 12 is fixedly connected with a second guard plate 20, the bottom front end of the shovel head 12 is fixedly connected with a first guard plate 19, and the top rear end of the shovel head 12 is fixedly connected with a limiting block 21 on the left and right sides. The bottom front end of the shovel seat 1 is provided with a limiting groove 22 on the left and right sides, and the inner part of the two limiting grooves 22 is respectively connected with the corresponding limiting block 21 in sliding connection;

[0046] Specifically, the first guard plate 19 and the second guard plate 20 are supported by a strong alloy material to provide part of the reinforcing effect for the shovel head 12. The limiting groove 22 and the limiting block 21 ensure that the shovel head 12 will not be dislocated during installation.

[0047] Working principle: when using the device, when the shovel head 12 needs to be replaced, the pull ring 17 can be pulled first, the pull ring 17 is pulled and the connecting column 6 is moved upward, the connecting column 6 is moved upward and the pawl 5 is rotated upward, at this time the pawl 5 will be disengaged from the meshing state with the ratchet wheel 9, the ratchet wheel 9 will no longer limit the rotation of the transmission rod 8, at this time the shovel head 12 is pulled, the two racks 13 behind the shovel head 12 are moved forward, since the spur gear 10 is meshed with the rack 13, and the transmission rod 8 is no longer limited, at this time the rack 13 moves and the spur gear 10 rotates, when the rack 13 is pulled out of the inner cavity 3, the shovel head 12 can be disassembled, and when the shovel head 12 is installed, only the shovel head 12 needs to be pushed backward, the shovel head 12 can be fixed through the interaction of the ratchet wheel 9 and the pawl 5, and the pawl 5 is always meshed with the ratchet wheel 9 through the spring 7, so that the fixation of the shovel head 12 will not fall off, and the disassembly and installation work is very convenient;

[0048] And in the process of using the device, when the length of the five-pit chisel needs to be lengthened, at this time the transmission column 204 is rotated, the transmission column 204 is rotated and the driving bevel gear 205 is rotated, since the driving bevel gear 205 is meshed with the driven bevel gear 207, the driving bevel gear 205 is rotated and the driven bevel gear 207 rotates the threaded rod 206, since the threaded sleeve 208 is limited by the sliding groove 15 and the sliding block 14 at this time, the threaded rod 206 rotates and the threaded sleeve 208 moves forward, and the threaded sleeve 208 moves forward and drives the fixed rod 201 to move forward, and then the fixed rod 201 drives the shovel base 1 to move forward, at this time the length of the device can be lengthened, and the adaptability of the five-pit chisel to various situations is improved.

[0049] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A five-pit chisel, including a shovel base (1), characterized in that: The shovel base (1) has an inner cavity (3) on its rear side. A rotating rod (4) is rotatably connected to the upper middle part of the inner side of the inner cavity (3). A pawl (5) is fixedly connected to the middle outer side of the rotating rod (4). A connecting post (6) is fixedly connected to the front top of the pawl (5). A spring (7) is fixedly connected to the rear top of the pawl (5). The top of the spring (7) is fixedly connected to the top of the inner cavity (3). A transmission rod (8) is rotatably connected to the middle inner side of the inner cavity (3). A ratchet (9) is fixedly connected to the middle outer side of the transmission rod (8). The ratchet (9) meshes with the pawl (5). The outer wall of the transmission rod (8) is fixedly connected to the left and right sides of the outer wall of the transmission rod (8). The front end of the inner cavity (3) of the shovel seat (1) is provided with windows (11) on the left and right sides. The bottom of the shovel seat (1) is provided with a shovel head (12). The rear wall of the shovel head (12) is fixedly connected to the left and right sides of the rear wall of the shovel head (12). The rear ends of the two racks (13) pass through the corresponding windows (11) respectively. The upper sides of the two racks (13) are respectively meshed with the corresponding shovel gears (10). The middle of the rear side of the shovel seat (1) is fixedly connected to a telescopic mechanism (2). The telescopic mechanism (2) is used to conveniently increase the length of the device.

2. The five-hole chisel according to claim 1, characterized in that: The telescopic mechanism (2) includes a fixed rod (201), which is fixedly connected to the middle of the rear side of the shovel seat (1). A shovel handle (202) is provided at the rear end of the fixed rod (201). A round hole (203) is provided on the front side of the shovel handle (202). A transmission column (204) is rotatably connected to the rear top of the shovel handle (202). The bottom end of the transmission column (204) passes through the shovel handle (202) and is fixedly connected to a driving bevel gear (205). A threaded rod (206) is rotatably connected to the rear end of the round hole (203). A driven bevel gear (207) is fixedly connected to the rear side of the outer wall of the threaded rod (206). The driven bevel gear (207) meshes with the driving bevel gear (205). A threaded sleeve (208) is threadedly connected to the outer side of the threaded rod (206). The front end of the threaded sleeve (208) is fixedly connected to the fixed rod (201).

3. The five-hole chisel according to claim 2, characterized in that: The upper and lower sides of the inner surface of the circular hole (203) are fixedly connected to sliders (14), and the upper and lower sides of the threaded sleeve (208) are provided with grooves (15). The interior of the two grooves (15) are slidably connected to the corresponding sliders (14).

4. The five-hole chisel according to claim 2, characterized in that: The top of the transmission column (204) is fixedly connected to a throttle (16), and the internal size of the circular hole (203) matches the size of the threaded sleeve (208).

5. The five-hole chisel according to claim 1, characterized in that: The top of the connecting column (6) passes through the shovel seat (1) and is fixedly connected with a pull ring (17). The bottom size of the shovel seat (1) matches the size of the shovel head (12).

6. The five-hole chisel according to claim 2, characterized in that: The outer wall of the shovel handle (202) has multiple mounting slots (18) equidistantly spaced around the rear side, and the upper and lower sides of the fixing rod (201) are provided with transition slopes (23).

7. The five-hole chisel according to claim 1, characterized in that: The inner bottom of the shovel head (12) is fixedly connected to a second guard plate (20), and the bottom front end of the shovel head (12) is fixedly connected to a first guard plate (19).

8. The five-hole chisel according to claim 1, characterized in that: The top rear end of the shovel head (12) is fixedly connected to the left and right sides of the shovel head (12), and the bottom front end of the shovel seat (1) is provided with the left and right sides of the shovel seat (1). The interior of the two shovel seats (22) is slidably connected to the corresponding shovel seats (21).

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