Drill chuck tightening device

Abstract

The utility model provides a drill chuck tightener which comprises a tightening wrench, a chain wheel, a base and a fixing piece, the chain wheel is connected with a screwing portion of a drill chuck in a sleeved mode, the inner surface of the chain wheel is provided with an inner tooth face meshed with oblique teeth of the screwing portion of the drill chuck, the outer surface of the chain wheel is provided with an outer tooth face matched with a wrench wheel of the tightening wrench, and the fixing piece is arranged on the base. The base is arranged outside the fixing part of the drill chuck and the crankset in a sleeving mode and supports the crankset, and the base is fixedly connected with the fixing piece. According to the utility model, the chain wheel can be meshed with the helical teeth on the twisting part of the drill chuck, and then the chain wheel is driven to be tightened by the tightening wrench, so that the stress is uniform and firm, the helical teeth are prevented from being damaged, and the chain wheel is matched with a lengthened lever structure to generate larger torque for tightening; and meanwhile, the arrangement of the base further ensures that the chain wheel and the fixing part of the drill chuck are stably supported, and the situation that screwing of the drill chuck is affected due to shaking and the like is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drill chuck assembly, and particularly relates to a drill chuck tightening device. Background Art

[0002] The drill chuck is one of the main accessories in the electric tool and machine tool industries and is widely used in electric hand drills and drill presses. Structurally, drill chucks are mainly divided into two categories: wrench type and hand-tightening type. The wrench-type drill chuck needs to be tightened with a wrench wheel and is mainly used in the machine tool industry, such as on bench drills and electric hand drills. The hand-tightening type drill chuck is tightened by holding the front and rear sleeves and is mainly used on electric hand drills. Since the wrench-type drill chuck is tightened by a wrench wheel, and the wrench wheel usually has an extended lever arm, during the tightening process, it can increase the torque input, making the clamping force of the drill chuck greater. Due to the advantages of simple structure, easy processing of parts, low price, and reliable performance of the wrench-type drill chuck, it has a wider range of uses. However, currently, the tools used for locking drill chucks are usually small-sized wrenches, which still have problems such as inconvenient use and difficult tightening. Content of the Utility Model

[0003] The purpose of the utility model is: aiming at the deficiencies in the above background art, to provide a drill chuck tightening device that is more convenient to use and tighten the drill chuck, and the tightening is firm and reliable.

[0004] To achieve the above purpose, the utility model provides a drill chuck tightening device, including a tightening wrench, a gear disc, a base, and a fixing member. The gear disc is sleeved on the rotating part of the drill chuck. The inner surface of the gear disc is provided with an inner tooth surface that meshes with the helical teeth of the rotating part of the drill chuck. The outer surface of the gear disc is provided with an outer tooth surface that matches the wrench wheel of the tightening wrench. The base is sleeved outside the fixed part of the drill chuck and the gear disc and supports the gear disc. The base is provided with a pin hole, and a pin is inserted into the pin hole. The end of the pin is inserted into a connection hole opened in the fixed part of the drill chuck. The base is fixedly connected to the fixing member.

[0005] Further, the base is provided with a first through hole and a second through hole. The size of the first through hole is larger than that of the second through hole. The first through hole matches the outer diameter of the gear disc, and the second through hole matches the outer diameter of the fixed part of the drill chuck.

[0006] Further, the number of the pin holes is set to be one or more.

[0007] Further, the number of the pin holes is set to be three and is symmetrically distributed in a ring relative to the center of the base.

[0008] Further, the inner tooth surface of the gear disc has one tooth or multiple teeth.

[0009] Further, the chainring is a complete cylindrical structure or a cylindrical structure with a notch.

[0010] Further, the base is a complete cylindrical structure or a cylindrical structure with a notch.

[0011] Further, threaded holes are formed in the base, and the base is fixedly connected to the fixing member by screws.

[0012] Further, the fixing member is a fixing plate, and screw through holes corresponding to the threaded holes one by one are formed in the fixing plate.

[0013] Further, the fixing member is a fixing wrench, and screw through holes corresponding to the threaded holes one by one are formed in the fixing wrench.

[0014] The above solution of the present utility model has the following beneficial effects:

[0015] The drill chuck tightening device provided by the present utility model, based on the settings of the tightening wrench, chainring, base and fixing member, can enable the chainring to engage with the helical teeth on the screwing part of the drill chuck, and then drive the chainring to tighten by the tightening wrench, ensuring uniform and firm force and avoiding damage to the helical teeth. Cooperating with the lengthened lever structure can generate a greater torque for tightening. At the same time, the setting of the base further ensures a stable support for the fixing parts of the chainring and the drill chuck, avoiding shaking and other factors that affect the tightening of the drill chuck.

[0016] Other beneficial effects of the present utility model will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0017] Figure 1 is the front view of the overall structure of Embodiment 1 of the present utility model;

[0018] Figure 2 is Figure 1 the middle cross-sectional view of;

[0019] Figure 3 is the front view of the overall structure of Embodiment 2 of the present utility model;

[0020] Figure 4 is Figure 3 the middle cross-sectional view of.

[0021]

Description of the Reference Numerals

[0022] 1 - Tightening wrench; 2 - Chainring; 3 - Base; 4 - Drill chuck; 5 - Helical teeth; 6 - Plug; 7 - Fixing plate; 8 - Screw through hole; 9 - Threaded hole; 10 - Fixing wrench. Specific Embodiments

[0023] To make the technical problems, technical solutions and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative work belong to the protection scope of the present utility model. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a locking connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] Embodiment 1:

[0027] As Figure 1 、 Figure 2 shown, Embodiment 1 of the present utility model provides a drill chuck tightening device, which includes a tightening wrench 1, a gear disc 2, a base 3 and a fixing member. Among them, the gear disc 2 is sleeved on the rotating part of the drill chuck 4, and the inner surface of the gear disc 2 is provided with an inner tooth surface that meshes with the helical teeth 5 of the rotating part of the drill chuck 4. When the gear disc 2 rotates, it can drive the rotating part of the drill chuck 4 to rotate synchronously.

[0028] The gear disc 2 is rotated by operating the tightening wrench 1. Specifically, the outer surface of the gear disc 2 is provided with an outer tooth surface that matches the wrench wheel of the tightening wrench 1. After the wrench wheel of the tightening wrench 1 is sleeved, by rotating the gear disc 2 through the lengthened lever structure, a greater torque can be generated to tighten the drill chuck 4, and the convenience of operation is improved.

[0029] It should be noted that in this embodiment, the inner tooth surface of the chainring 2 may have multiple teeth, or may only have one or a small number of teeth, and no specific limitation is made here. After meshing with the helical teeth 5 of the twisting part, it can drive the twisting part to rotate.

[0030] It should be noted that in this embodiment, the chainring 2 can adopt a complete cylindrical structure or a cylindrical structure with a notch, and the notch does not affect the twisting of the twisting part by the chainring 2.

[0031] In this embodiment, the base 3 is sleeved on the fixed part of the drill chuck 4 and the outside of the chainring 2, and supports the chainring 2. Among them, a pin hole is provided on the base 3, and a pin 6 is inserted into the pin hole. The end of the pin 6 is inserted into the fixed part of the drill chuck 4, so that when the twisting part of the drill chuck 4 rotates, the fixed part remains stationary and does not rotate with the twisting part, thereby tightening the drill chuck 4.

[0032] It should be noted that in this embodiment, the base 3 is provided with a first through hole and a second through hole, and the first through hole and the second through hole are also communicated with each other. The size of the first through hole is larger than that of the second through hole. The first through hole matches the outer diameter of the chainring 2, and the second through hole matches the outer diameter of the fixed part of the drill chuck 4, and both are in the form of small clearance fit. Therefore, after installation, it can form a stable support for the chainring 2 and the fixed part of the drill chuck 4, and avoid shaking and other problems that affect the tightening of the drill chuck 4.

[0033] In this embodiment, the base 3 and the fixing member are fixedly connected to make the base 3 itself in a fixed state, so as to ensure that the fixed part of the drill chuck 4 is in a fixed state. Specifically, the fixing member is a fixing plate 7. A plurality of screw through holes 8 are provided on the fixing plate 7, and a plurality of threaded holes 9 corresponding to the screw through holes 8 one by one are provided on the base 3. When the base 3 and the fixing plate 7 are installed in place, the base 3 and the fixing plate 7 are fixed by inserting screws through the screw through holes 8 and then into the threaded holes 9 and tightening. Since the fixing plate 7 itself is a fixed structure, the fixed state of the base 3 can be ensured. This method is also called the fixed assembly of the drill chuck 4.

[0034] It should be noted that in this embodiment, the base 3 can similarly adopt a complete cylindrical structure or a cylindrical structure with a notch, similar to the chainring 2.

[0035] As a preferred implementation manner, in this embodiment, three pin holes are provided and are symmetrically distributed in a ring with respect to the center of the base, that is, the included angle between them is 120 degrees, so that the force on the pin 6 is more uniform and the connection is more stable. Of course, the number of pin holes is not limited here, and one pin hole or more pin holes can be used.

[0036] As described above, by adopting the drill chuck tightening device provided in this embodiment, based on the settings of the tightening wrench 1, the gear disc 2, the base 3, and the fixing member, the gear disc 2 can mesh with the helical teeth 5 on the screwing part of the drill chuck 4, and then the tightening wrench 1 is driven to drive the gear disc 2 to tighten, ensuring uniform and firm force and avoiding damage to the helical teeth. With the cooperation of the lengthened lever structure, a greater torque can be generated for tightening. At the same time, the setting of the base 3 further ensures a stable support for the fixing parts of the gear disc 2 and the drill chuck 4, avoiding shaking and other factors that affect the tightening of the drill chuck 4.

[0037] Embodiment 2:

[0038] Meanwhile, as shown in Figure 3 , Figure 4 Another drill chuck tightening device is provided in Embodiment 2 of the present utility model. The main difference from Embodiment 1 is that the fixing member is a fixed wrench 10, and the base 3 is fixed by the fixed wrench 10. Since the fixed wrench 10 is also handheld, after the drill chuck tightening device is installed, hold the fixed wrench 10 with one hand and keep it fixed, and rotate the tightening wrench 1 relative to the fixed wrench 10 with the other hand. This method is also called handheld assembly.

[0039] Among them, screw holes 8 corresponding to the threaded holes 9 one by one are also provided on the fixed wrench 10, and the base 3 and the fixed wrench 10 can be fixedly connected by screws.

[0040] Other parts of the drill chuck tightening device provided in this embodiment are similar to the concept and beneficial effects of Embodiment 1, and will not be elaborated here.

[0041] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as these combinations of technical features do not conflict, they should be considered as the scope described in this specification.

[0042] The above embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A drill chuck tightening device, characterized in that, It includes a tightening wrench, a sprocket, a base, and a fixing member. The sprocket is sleeved on the rotating part of the drill chuck. The inner surface of the sprocket is provided with an inner tooth surface that meshes with the helical teeth of the rotating part of the drill chuck. The outer surface of the sprocket is provided with an outer tooth surface that matches the wrench wheel of the tightening wrench. The base is sleeved on the fixing part of the drill chuck and the outside of the sprocket, and supports the sprocket. The base is provided with a pin hole, and a pin is inserted into the pin hole. The end of the pin is inserted into a connection hole opened in the fixing part of the drill chuck. The base is fixedly connected to the fixing member.

2. The drill chuck tightening device according to claim 1, characterized in that, The base is provided with a first through hole and a second through hole. The size of the first through hole is larger than that of the second through hole. The first through hole matches the outer diameter of the sprocket, and the second through hole matches the outer diameter of the fixing part of the drill chuck.

3. The drill chuck tightening device according to claim 1, characterized in that, The number of the pin holes is set to be one or more.

4. The drill chuck tightening device according to claim 3, characterized in that, The number of the pin holes is set to be three and is symmetrically distributed in a ring with respect to the center of the base.

5. The drill chuck tightening device according to claim 1, characterized in that, The inner tooth surface of the sprocket has one tooth or multiple teeth.

6. The drill chuck tightening device according to claim 1, characterized in that, The sprocket is a complete cylindrical structure or a cylindrical structure with a notch.

7. A drill chuck tightening device according to claim 1, characterized in that, The base is a complete cylindrical structure or a cylindrical structure with a notch.

8. A drill chuck tightening device according to claim 1, characterized in that, Threaded holes are opened on the base, and the base is fixedly connected to the fixing member through screws.

9. The drill chuck tightening device according to claim 8, wherein, The fixing member is a fixing plate, and screw through holes corresponding to the threaded holes one by one are opened on the fixing plate.

10. The drill chuck tightening device according to claim 8, characterized in that, The fixing member is a fixing wrench, and screw through holes corresponding to the threaded holes one by one are opened on the fixing wrench.

Images