Drill chuck loosening and tightening device

Abstract

A drill chuck loosening and tightening device comprises a lantern ring and a clamping block handle assembly, the lantern ring is arranged on a drill chuck in a sleeving mode, the clamping block handle assembly is movably connected with the lantern ring through a connecting pin, and the inner side end face of the clamping block handle assembly is connected to the drill chuck in a clamped mode. An inner hole of the lantern ring is a positioning hole matched with a drill chuck, a penetrating groove hole used for installing a clamping block handle assembly is further formed in the side wall of the lantern ring, and rotary pin holes used for installing a connecting pin are formed in the bottom of the groove hole and the side wall above the groove hole. The clamping block handle assembly comprises a clamping block and a lever handle. The end face of the inner side of the clamping block is of a concave-arc-shaped structure, and pawls are formed at the two tips of the concave-arc-shaped structure and clamped with an anti-skid clamping groove of an elastic shifting ring of the drill chuck in a matched mode. The clamping block is further provided with a movable pin hole used for installing the connecting pin. The utility model has the advantages that the locking of the drill chuck is reliable, the phenomenon of slipping failure can be avoided, the production efficiency can be effectively improved, the service life is prolonged, the labor is saved, the operation is convenient, the structure is simple, and the like, and is easy to popularize and apply.

Description

Technical Field

[0001] The utility model relates to a machine tool accessory tool, in particular to a drill chuck tightening device. Background Art

[0002] The drill chuck is installed at the end of the main shaft of the drilling machine, and uses three concentrically movable jaws to clamp the drill bit or other tools. The clamping and loosening are achieved by rotating the tension ring, which is usually achieved by a matching drill gear meshing device "key". During the application of the matching "key", the drill chuck often fails to lock tightly or slips, which brings inconvenience to production. In order to make the drill chuck lock the drill bit according to the actual working conditions, it is usually necessary to use a tool to impact the tension ring in the circumferential direction. The larger the impact force, the greater the damage to the tension ring, which can easily shorten the service life of the drill chuck. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a drill chuck loosening device to solve the shortcomings of the prior art that the drill chuck is prone to being unable to be locked tightly, slipping and failing, and shortening the service life of the drill chuck.

[0004] The technical solution to solve the above technical problems is: a drill chuck tensioning device, including a ring and a block handle assembly, the ring is sleeved on the drill chuck, the block handle assembly and the ring are movably connected through a connecting pin, and the inner end face of the block handle assembly is clamped on the drill chuck.

[0005] A further technical solution of the utility model is: the collar is a circular ring structure, the inner hole of the collar is a positioning hole that cooperates with the drill chuck, the collar is also provided with a through slot hole on the side wall for installing the block handle assembly, and a swivel pin hole A and a swivel pin hole B for installing the connecting pin are correspondingly provided at the bottom of the slot hole and on the side wall above the slot hole.

[0006] A further technical solution of the utility model is that: the collar is provided with a limiting step at the bottom end of the positioning hole for locating the axial matching position with the drill chuck.

[0007] A further technical solution of the utility model is: the block handle assembly includes a block and a lever handle; the inner end surface of the block is a concave arc structure, and the two tips of the concave arc structure form pawls, which cooperate with the anti-slip groove of the tension ring of the drill chuck to clamp; the block is also provided with a movable pin hole for installing a connecting pin; the lever handle is fixedly connected to the outer end of the block.

[0008] A further technical solution of the utility model is that the clamping block is further provided with a limit pin hole on one side of the movable pin hole, and a cylindrical pin for preventing the device from shaking too much in a free state is installed in the limit pin hole.

[0009] A further technical solution of the utility model is that the clamping block is a square structure.

[0010] Due to the adoption of the above structure, the drill chuck tensioning device of the utility model has the following beneficial effects compared with the prior art:

[0011] 1. The drill chuck is locked reliably

[0012] The utility model comprises a collar and a block handle assembly, wherein the collar is sleeved on a drill chuck, the block handle assembly and the collar are movably connected through a connecting pin, and the inner end face of the block handle assembly is clamped on the drill chuck. When in use, the collar is sleeved on the drill chuck, the inner end face of the block handle assembly is clamped on the drill chuck, and the block handle assembly is rotated to drive the drill chuck to be loosened or tightened. Since the inner end face of the block handle assembly is clamped on the drill chuck, its locking is relatively reliable.

[0013] Furthermore, the block handle assembly of the utility model includes a block and a lever handle; wherein the inner end surface of the block is a concave arc structure, and the two tips of the concave arc structure form a pawl, which cooperates with the anti-slip groove of the tension ring of the drill chuck to clamp, thereby further improving the reliability of locking.

[0014] 2. Avoid slipping failure

[0015] The utility model has a more reliable locking effect on the drill chuck, can avoid the phenomenon of slipping failure, solves the problem of unstable drill bit clamping of the tool provided in the drill chuck of the mechanical engineering machine tool accessory, and effectively improves the production efficiency.

[0016] 3. Can extend the service life of the drill chuck

[0017] The utility model has a more reliable locking effect on the drill chuck, and does not require the use of tools to impact the tension ring with gravity in the circumferential direction, thereby avoiding damage to the tension ring and prolonging the service life of the drill chuck.

[0018] 4. Save effort and easy to operate

[0019] When the utility model is used, the collar is put on the drill chuck, the inner end surface of the clamping block handle assembly is clamped on the drill chuck, and the clamping block handle assembly is rotated to drive the drill chuck to be loosened or tightened. Since the lever handle is used for operation, the utility model is very labor-saving and convenient to operate.

[0020] 5. Simple structure, low cost, and easy to promote and apply.

[0021] The technical features of a drill chuck tensioning device of the utility model will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 : A structural diagram of a drill chuck tensioning device of the utility model,

[0023] Figure 2 : A schematic diagram of the structure of the collar described in Example 1,

[0024] Figure 3 : A schematic diagram of the structure of the block handle assembly described in Example 1,

[0025] Figure 4 : A schematic diagram of the three-dimensional structure of the utility model when it is used and is sleeved on a drill chuck,

[0026] Figure 5 : A schematic diagram of the planar structure of the utility model when it is used and is sleeved on a drill chuck (viewed from above),

[0027] Figure 6 : Figure 5 Schematic diagram of the enlarged F part;

[0028] Figure 7 : Schematic diagram of the drill chuck structure,

[0029] Figure 8 : A schematic diagram of the structure of a gear meshing device for drilling that is currently used in conjunction with a drill chuck;

[0030] In the above drawings, the descriptions of the reference numerals are as follows:

[0031] 1-ring, 101-positioning hole, 102-slot hole, 103-swivel pin hole A, 104-swivel pin hole B, 105-limiting step,

[0032] 2-block handle assembly, 21-block, 211-pawl, 212-movable pin hole, 213-limiting pin hole, 214-cylindrical pin,

[0033] 22-Lever handle,

[0034] 3- Connecting pin,

[0035] 4-drill chuck, 41-elastic ring, 411-anti-slip slot,

[0036] 5-Drill gear engagement device (key). DETAILED DESCRIPTION Embodiment 1:

[0037] A drill chuck tensioning device is suitable for a drill chuck 4 with an anti-slip groove 411 on the outer circumference of a tensioning ring 41, comprising a collar 1 and a clamping block handle assembly 2. The collar 1 is sleeved on the drill chuck 4, the clamping block handle assembly 2 is movably connected to the collar 1 through a connecting pin 3, and the inner end face of the clamping block handle assembly 2 is clamped on the drill chuck 4.

[0038] The collar 1 is a circular ring structure, the inner hole of the collar 1 is a positioning hole 101 that cooperates with the drill chuck 4, and a limiting step 105 is provided at the bottom end of the positioning hole 101 for locating the axial matching position with the drill chuck 4; the collar 1 is also provided with a through slot 102 on the side wall for installing the block handle assembly, and a swivel pin hole A103 and a swivel pin hole B104 for installing the connecting pin 3 are correspondingly provided at the bottom of the slot 102 and on the side wall above the slot 102.

[0039] The block handle assembly 2 includes a block 21 and a lever handle 22; the block 21 is a square structure, the inner end surface of the block 21 is a concave arc structure, and the two tips of the concave arc structure form a pawl 211, which is matched with the anti-slip groove 401 of the tension ring of the drill chuck 4 and clamped; the block 21 is also provided with a movable pin hole 212 for installing the connecting pin 3; and a limit pin hole 213 is also provided on one side of the movable pin hole 212, and a cylindrical pin 214 is installed in the limit pin hole 213 to prevent the device from shaking too much in the free state. The lever handle 22 is fixedly connected to the outer end of the block 21.

[0040] During installation, first connect the block 21 and the lever handle 22 of the block handle assembly 2, then extend the inner end of the block 21 into the slot 102 of the collar 1, and install the connecting pin 3 in the swivel pin hole A103 above the slot of the collar 1, the movable pin hole 212 of the block 21, and the swivel pin hole B103 at the bottom of the slot of the collar 1, so that the collar 1 and the block handle assembly 2 can move around the axis of the connecting pin.

[0041] Working principle:

[0042] When in use, the lever handle 22 of the block handle assembly 2 applies tangential force to the drill chuck 4 in the circumference, and the connecting pin 3 on the block handle assembly 2 becomes the lever fulcrum. The pawl 211 cooperates with the anti-slip groove 401 of the tension ring of the drill chuck 4. After the block 21 is subjected to force, the force applied by the lever handle will be decomposed into circumferential tangential force and radial force on the tension ring. According to the length of the lever handle 22, the tension ring of the drill chuck 4 receives about 10 times the tangential force and about 30 times the radial force, which ensures that the pawl 211 will not slip.

[0043] Directions:

[0044] (1) Clamping: The drill chuck is manually pre-tightened (generally, the spindle is locked to limit the rotation of the drill chuck due to force), the device is inserted into the drill chuck 4 to the limit step 105, and force is applied to the lever handle 22 in the clockwise direction along the axis of the drill chuck.

[0045] (2) Loosening: Insert the device into the drill chuck 4 to the limit step 105, and apply force to the lever handle 22 in the counterclockwise direction along the axis of the drill chuck 4.

Claims

1. A drill chuck tensioning device, characterized in that: The invention comprises a collar (1) and a clamping block handle assembly (2), wherein the collar (1) is sleeved on a drill chuck (4), the clamping block handle assembly (2) and the collar (1) are movably connected via a connecting pin (3), and the inner end surface of the clamping block handle assembly (2) is clamped on the drill chuck (4).

2. A drill chuck tensioning device according to claim 1, characterized in that: The collar (1) is a circular ring structure, the inner hole of the collar (1) is a positioning hole (101) that cooperates with the drill chuck (4), the collar (1) is also provided with a through slot (102) on the side wall for mounting a block handle assembly, and a swivel pin hole A (103) and a swivel pin hole B (104) for mounting the connecting pin (3) are correspondingly provided at the bottom of the slot (102) and on the side wall above the slot (102).

3. A drill chuck tensioning device according to claim 2, characterized in that: The collar (1) is provided with a limiting step (105) at the bottom end of the positioning hole (101) for locating the axial matching position with the drill chuck (4).

4. A drill chuck tensioning device according to claim 2, characterized in that: The block handle assembly (2) comprises a block (21) and a lever handle (22); the inner end surface of the block (21) is a concave arc structure, and two tips of the concave arc structure form ratchets (211), which are matched and clamped with the anti-slip groove (401) of the tension ring of the drill chuck (4); the block (21) is also provided with a movable pin hole (212) for installing the connecting pin (3); and the lever handle (22) is fixedly connected to the outer end of the block (21).

5. A drill chuck tensioning device according to claim 4, characterized in that: The clamping block (21) is further provided with a limit pin hole (213) on one side of the movable pin hole (212), and a cylindrical pin is installed in the limit pin hole (213) to prevent the device from shaking too much in a free state.

6. A drill chuck tensioning device according to claim 4 or 5, characterized in that: The clamping block (21) is a square structure.

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