Drill chuck

Abstract

The utility model relates to the technical field of drill chuck structures, in particular to a drill chuck which comprises a drill body, a clamping jaw, a nut, an outer sleeve and a front cover, the drill body is provided with a clamping jaw hole, the front end of the clamping jaw penetrates through the clamping jaw hole and penetrates out of the lower end of the drill body, the rear end of the clamping jaw penetrates through the clamping jaw hole and penetrates out of the side wall of the drill body, and the clamping jaw penetrating out of the side wall of the drill body is connected with the nut in a matched mode. The outer side of the nut is connected with an outer sleeve, and a front cover is sleeved on the outer wall of the drill body at the front end of the outer sleeve, and is characterized in that a clamp spring-like structure is arranged on the inner wall of the front cover, the clamp spring-like structure comprises a connecting part and a clamping part, the connecting part is connected with the inner wall of the front cover, and a clamping gap is formed between the clamping part and the inner wall of the front cover after the clamping part is connected with the connecting part; the clamping part is inserted into a clamping groove formed in the outer wall of the drill body to achieve connection of the drill body and the front cover, and the drill has the advantages of being simple in structure, attractive in appearance, free of clamp spring and clamp ring structure exposure and the like.

Description

Technical Field

[0001] This utility model relates to the field of drill chuck structure technology, specifically a drill chuck. Background Technology

[0002] As is well known, a drill chuck includes a drill body, jaws, nut, outer sleeve, and front cover. In the existing technology, the outer side of the front cover is usually fixed to the lower end of the drill body by a retaining spring. This results in the retaining spring structure being exposed on the outside of the drill body, affecting the appearance of the drill chuck. However, in recent years, customers have increasingly higher requirements for the appearance of drill chucks. Retaining retaining springs or retaining rings with limiting functions are not allowed on the outer side of the front end of the drill chuck, making the drill chuck more aesthetically pleasing. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a drill chuck with a simple structure, beautiful appearance, and no exposed snap ring or retaining ring structure.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A drill chuck includes a drill body, jaws, a nut, an outer sleeve, and a front cover. The front cover is fitted onto the outer wall of the drill body at the front end of the outer sleeve. The front cover is characterized by having a spring-like structure on its inner wall. The spring-like structure includes a connecting part and a snap-fit ​​part. The connecting part is connected to the inner wall of the front cover. After the snap-fit ​​part is connected to the connecting part, a snap-fit ​​gap is provided between the snap-fit ​​part and the inner wall of the front cover. The snap-fit ​​part is inserted into a snap-fit ​​groove provided on the outer wall of the drill body to achieve the connection between the drill body and the front cover.

[0006] The snap ring-like structure described in this utility model is located at the front end of the inner wall of the front cover.

[0007] The spring-like structure described in this utility model has at least one set, and the connecting part of each set of spring-like structures is fixedly connected to the inner wall of the front cover. The snap-fit ​​part of each set of spring-like structures extends along the inner wall of the front cover and forms a snap-fit ​​gap with the front cover.

[0008] The snap ring-like structure described in this utility model is integrally connected to the front cover, and both the front cover and the snap ring-like structure are made of manganese steel or stainless steel.

[0009] The drill body of this invention is fitted with a bushing on its outer side.

[0010] The front cover of this utility model is provided with a retaining spring inside. The retaining spring is located on the rear side of the retaining spring-like structure. The drill body is provided with a receiving groove that cooperates with the retaining spring. The axial positioning of the drill chuck bushing and / or outer sleeve is achieved by the retaining spring.

[0011] After the snap-fit ​​part of this utility model snaps into the snap-fit ​​groove, the snap-fit ​​gap between the snap-fit ​​part and the inner wall of the front cover abuts against the end face of the drill chuck bushing, outer sleeve, drill body or snap ring to prevent dust from entering the inside of the drill chuck.

[0012] The front cover of this utility model is provided with a sealing ring inside. The sealing ring is sleeved on the drill body on the rear side of the snap ring structure. The sealing ring seals the snap gap between the snap-fit ​​part and the inner wall of the front cover after snap-fit, preventing dust from entering the drill chuck.

[0013] The sealing ring described in this invention is made of non-metallic material.

[0014] This utility model, due to the above-mentioned structure, has the advantages of simple structure, beautiful appearance, and no exposed snap ring structure. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0016] Figure 2 yes Figure 1 Top view of the front cover.

[0017] Figure 3 yes Figure 1 Axonometric view of the front cover.

[0018] Figure 4 yes Figure 1 Enlarged view of section A.

[0019] Figure 5 This is a schematic diagram of the sealing ring.

[0020] Figure 6 yes Figure 4 A magnified view of a section of the drilling rig.

[0021] Figure 7 This is a top view of the front cover of Embodiment 2. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] As shown in the attached figure, a drill chuck includes a drill body 1, a jaw 2, a nut 3, an outer sleeve 4, and a front cover 5. The drill body 1 has a jaw 2 hole. The front end of the jaw 2 passes through the jaw 2 hole and exits through the lower end of the drill body 1. The rear end of the jaw 2 passes through the jaw 2 hole and exits through the side wall of the drill body 1. The jaw 2 that exits through the side wall of the drill body 1 is connected to the nut 3. The outer side of the nut 3 is connected to the outer sleeve 4. The front cover 5 is fitted onto the outer wall of the drill body 1 at the front end of the outer sleeve 4. The front cover 5 is characterized by having a spring-like structure 6 on the inner wall of the front cover 5. The spring-like structure 6 includes a connecting part 7 and a snap-fit ​​part 8. The connecting part 7 is connected to the inner wall of the front cover 5. After the snap-fit ​​part 8 is connected to the connecting part 7, a snap-fit ​​gap 9 is provided between the snap-fit ​​part 8 and the inner wall of the front cover 5. The snap-fit ​​part 8 is inserted into the snap-fit ​​groove 11 provided on the outer wall of the drill body 1 to realize the connection between the drill body 1 and the front cover 5.

[0024] Furthermore, the aforementioned spring-like structure 6 is located at the front end of the inner wall of the front cover 5.

[0025] Furthermore, the aforementioned spring-like structure 6 is provided in at least one set, and the connecting part 7 of each set of spring-like structures 6 is fixedly connected to the inner wall of the front cover 5. The snap-fit ​​part 8 of each set of spring-like structures 6 extends along the inner wall of the front cover 5 and forms a snap-fit ​​gap 9 between the front cover 5 and the front cover 5.

[0026] Furthermore, the spring-like structure 6 is integrally connected to the front cover 5, and both the front cover 5 and the spring-like structure 6 are made of manganese steel or stainless steel.

[0027] Furthermore, the drill body 1 is fitted with a bushing 13 on its outer side.

[0028] Furthermore, the front cover 5 is provided with a retaining spring 10 inside, which is located on the rear side of the retaining spring-like structure 6. The drill body 1 is provided with a receiving groove 14 that cooperates with the retaining spring 10, and the axial positioning of the drill chuck bushing 13 and / or outer sleeve 4 is achieved by the retaining spring 10.

[0029] Furthermore, after the snap-fit ​​part 8 snaps into the snap-fit ​​groove 11, the snap-fit ​​gap 9 between the snap-fit ​​part 8 and the inner wall of the front cover 5 abuts against the end face of the drill chuck bushing 13, outer sleeve 4, drill body 1 or snap ring 10 to prevent dust from entering the inside of the drill chuck.

[0030] Furthermore, the front cover 5 is provided with a sealing ring 12 inside. The sealing ring 12 is sleeved on the drill body 1 on the rear side of the snap ring structure 6. The sealing ring 12 seals the snap gap 9 between the snap-fit ​​part 8 and the inner wall of the front cover 5 after snap-fit, preventing dust from entering the drill chuck.

[0031] Furthermore, the sealing ring 12 is made of a non-metallic material.

[0032] Example 1

[0033] A drill chuck includes a drill body 1, a jaw 2, a nut 3, an outer sleeve 4, and a front cover 5. The drill body 1 has a jaw 2 hole. The front end of the jaw 2 passes through the jaw 2 hole and exits through the lower end of the drill body 1. The rear end of the jaw 2 passes through the jaw 2 hole and exits through the side wall of the drill body 1. The jaw 2 that exits through the side wall of the drill body 1 is connected to the nut 3. The outer side of the nut 3 is connected to the outer sleeve 4. The front cover 5 is fitted onto the outer wall of the drill body 1 at the front end of the outer sleeve 4. The front cover 5 is characterized by having a spring-like structure 6 on the inner wall of the front cover 5. The spring-like structure 6 includes a connecting part 7 and a snap-fit ​​part 8. The connecting part 7 is connected to the inner wall of the front cover 5. After the snap-fit ​​part 8 is connected to the connecting part 7, a snap-fit ​​gap 9 is provided between the snap-fit ​​part 8 and the inner wall of the front cover 5. The snap-fit ​​part 8 is inserted into a snap-fit ​​groove 11 provided on the outer wall of the drill body 1 to realize the connection between the drill body 1 and the front cover 5.

[0034] The aforementioned spring-like structure 6 is located at the front end of the inner wall of the front cover 5.

[0035] The aforementioned spring-like structure 6 is provided in a set. The connecting part 7 of each set of spring-like structures 6 is fixedly connected to the inner wall of the front cover 5. The snap-fit ​​part 8 of each set of spring-like structures 6 extends along the inner wall of the front cover 5 and forms a snap-fit ​​gap 9 between the front cover 5 and the front cover 5.

[0036] The aforementioned connecting part 7 is a connecting piece, the outer end of which is integrally connected to the inner wall of the front cover 5. The snap-fit ​​part 8 is an arc-shaped spring piece, which is connected to the inner end of the connecting piece. The arc-shaped spring piece extends along the inner wall of the front cover 5, and a snap-fit ​​gap 9 is formed between the arc-shaped spring piece and the interior of the front cover 5. The front end of the drill body 1 is inserted through the elastic expansion of the arc-shaped spring piece. When the arc-shaped spring piece passes through the snap-fit ​​groove 11 on the drill body 1, it springs into the snap-fit ​​groove 11, thereby realizing the snap-fit ​​between the front cover 5 and the drill body 1.

[0037] The aforementioned spring-like structure 6 is integrally connected to the front cover 5, and both the front cover 5 and the spring-like structure 6 are made of manganese steel or stainless steel.

[0038] The drill body 1 is fitted with a bushing 13 on its outer side.

[0039] The front cover 5 is provided with a retaining spring 10 inside. The retaining spring 10 is located on the rear side of the retaining spring structure 6. The drill body 1 is provided with a receiving groove 14 that cooperates with the retaining spring 10. The axial positioning of the drill chuck bushing 13 and / or outer sleeve 4 is achieved by the retaining spring 10.

[0040] After the snap-fit ​​part 8 snaps into the snap-fit ​​groove 11, the snap-fit ​​gap 9 between the snap-fit ​​part 8 and the inner wall of the front cover 5 abuts against the end face of the drill chuck bushing 13, outer sleeve 4, drill body 1 or snap ring 10 to prevent dust from entering the drill chuck.

[0041] The front cover 5 is provided with a sealing ring 12 inside. The sealing ring 12 is sleeved on the drill body 1 on the rear side of the snap ring structure 6. The sealing ring 12 seals the snap gap 9 between the snap-fit ​​part 8 and the inner wall of the front cover 5 after snap-fit, so as to prevent dust from entering the drill chuck.

[0042] The inner wall of the sealing ring 12 is provided with a flared groove, and the drill body 1 is provided with a sealing groove that cooperates with the sealing ring 12. The sealing ring 12 expands its inner diameter through the flared groove, thereby inserting the inner end of the sealing ring 12 into the sealing groove of the drill body.

[0043] In the above scheme, after the jaws 2 and the nut 3 of the drill body 1 are installed, the bushing 13 of the drill body 1 is put on the outside of the nut. The bushing 13 is covered with an outer sleeve, or the outer sleeve 4 is put directly on the outside of the nut 3 and the drill body 1. The retaining spring 10 is snapped into the receiving groove 14 of the drill body 1. Then the sealing ring 12 is put on the front end of the drill body 1. Finally, the front cover 5 is put on from the front end of the drill body 1. Since there is a snap-fit ​​gap 9 between the snap-fit ​​part 8 and the front cover 5, the snap-fit ​​part 8 expands outward during the process of putting the front cover 5 on, thereby inserting the front end of the drill body 1. When the snap-fit ​​part 8 contacts the snap-fit ​​groove 11, the snap-fit ​​part 8 snaps into the snap-fit ​​groove 11 due to the elastic effect, and finally the front cover 5 is fixed.

[0044] Example 2

[0045] A drill chuck includes a drill body 1, a jaw 2, a nut 3, an outer sleeve 4, and a front cover 5. The drill body 1 has a jaw 2 hole. The front end of the jaw 2 passes through the jaw 2 hole and exits through the lower end of the drill body 1. The rear end of the jaw 2 passes through the jaw 2 hole and exits through the side wall of the drill body 1. The jaw 2 that exits through the side wall of the drill body 1 is connected to the nut 3. The outer side of the nut 3 is connected to the outer sleeve 4. The front cover 5 is fitted onto the outer wall of the drill body 1 at the front end of the outer sleeve 4. The front cover 5 is characterized by having a spring-like structure 6 on the inner wall of the front cover 5. The spring-like structure 6 includes a connecting part 7 and a snap-fit ​​part 8. The connecting part 7 is connected to the inner wall of the front cover 5. After the snap-fit ​​part 8 is connected to the connecting part 7, a snap-fit ​​gap 9 is provided between the snap-fit ​​part 8 and the inner wall of the front cover 5. The snap-fit ​​part 8 is inserted into a snap-fit ​​groove 11 provided on the outer wall of the drill body 1 to realize the connection between the drill body 1 and the front cover 5.

[0046] The aforementioned spring-like structure 6 is located at the front end of the inner wall of the front cover 5.

[0047] The aforementioned spring-like structure 6 is provided in two sets. The connecting part 7 of each set of spring-like structures 6 is fixedly connected to the inner wall of the front cover 5. The snap-fit ​​part 8 of each set of spring-like structures 6 extends along the inner wall of the front cover 5 and forms a snap-fit ​​gap 9 between the front cover 5 and the front cover 5.

[0048] The aforementioned connecting part 7 is a connecting piece, the outer end of which is integrally connected to the inner wall of the front cover 5. The snap-fit ​​part 8 is an arc-shaped spring piece, which is connected to the inner end of the connecting piece. The arc-shaped spring piece extends along the inner wall of the front cover 5, and a snap-fit ​​gap 9 is formed between the arc-shaped spring piece and the interior of the front cover 5. The front end of the drill body 1 is inserted through the elastic expansion of the arc-shaped spring piece. When the arc-shaped spring piece passes through the snap-fit ​​groove 11 on the drill body 1, it springs into the snap-fit ​​groove 11, thereby realizing the snap-fit ​​between the front cover 5 and the drill body 1.

[0049] The aforementioned spring-like structure 6 is integrally connected to the front cover 5, and both the front cover 5 and the spring-like structure 6 are made of manganese steel or stainless steel.

[0050] The drill body 1 is fitted with a bushing 13 on its outer side.

[0051] The front cover 5 is provided with a retaining spring 10 inside. The retaining spring 10 is located on the rear side of the retaining spring structure 6. The drill body 1 is provided with a receiving groove 14 that cooperates with the retaining spring 10. The axial positioning of the drill chuck bushing 13 and / or outer sleeve 4 is achieved by the retaining spring 10.

[0052] After the snap-fit ​​part 8 snaps into the snap-fit ​​groove 11, the snap-fit ​​gap 9 between the snap-fit ​​part 8 and the inner wall of the front cover 5 abuts against the end face of the drill chuck bushing 13, outer sleeve 4, drill body 1 or snap ring 10 to prevent dust from entering the drill chuck.

[0053] The front cover 5 is provided with a sealing ring 12 inside. The sealing ring 12 is sleeved on the drill body 1 on the rear side of the snap ring structure 6. The sealing ring 12 seals the snap gap 9 between the snap-fit ​​part 8 and the inner wall of the front cover 5 after snap-fit, so as to prevent dust from entering the drill chuck.

[0054] In the above scheme, after the jaws 2 and the screw nut 3 of the drill body 1 are installed, the bushing 13 or the outer sleeve 4 of the drill body 1 is put on the outside of the screw nut 3 and the drill body 1. The retaining spring 10 is then put into the receiving groove 14 of the drill body 1. The sealing ring 12 is then put on the front end of the drill body 1. Finally, the front cover 5 is put on from the front end of the drill body 1. Since there is a retaining gap 9 between the retaining part 8 and the front cover 5, the retaining part 8 expands outward during the process of putting on the front cover 5, thereby inserting the front end of the drill body 1. When the retaining part 8 contacts the retaining groove 11, the retaining part 8 is engaged in the retaining groove 11 due to the elastic effect, thus finally fixing the front cover 5. The presence of two or more retaining spring-like structures 6 can increase the service life of the front cover 5.

[0055] As can be seen from the above two embodiments, this solution hides the existing exposed snap ring 10 structure on the outside of the front cover 5 inside the front cover 5. Since the front cover 5 is provided with a snap ring-like structure 6, the snap ring-like structure 6 is not protruding after the front cover 5 is installed, making it more aesthetically pleasing. Moreover, the design of the snap ring-like structure 6 only requires axial positioning of the front cover 5 or the sealing ring 12, resulting in less axial pressure on the front cover 5 and ensuring the service life of the front cover 5. Due to the adoption of the above structure, this utility model has the advantages of simple structure, beautiful appearance, and no exposed snap ring 10 structure.

Claims

1. A drill chuck, comprising a drill body, jaws, a nut, an outer sleeve, and a front cover, wherein the front cover is fitted onto the outer wall of the drill body at the front end of the outer sleeve, characterized in that... The inner wall of the front cover is provided with a spring-like structure, which includes a connecting part and a snap-fit ​​part. The connecting part is connected to the inner wall of the front cover. After the snap-fit ​​part is connected to the connecting part, there is a snap-fit ​​gap between the snap-fit ​​part and the inner wall of the front cover. The snap-fit ​​part is inserted into the snap-fit ​​groove provided on the outer wall of the drill body to realize the connection between the drill body and the front cover.

2. A drill chuck according to claim 1, characterized in that... The aforementioned spring-like structure is located at the front end of the inner wall of the front cover.

3. A drill chuck according to claim 1, characterized in that... The aforementioned spring-like structure has at least one set, and the connecting part of each set of spring-like structures is fixedly connected to the inner wall of the front cover. The snap-fit ​​part of each set of spring-like structures extends along the inner wall of the front cover and forms a snap-fit ​​gap with the front cover.

4. A drill chuck according to claim 1, characterized in that... The aforementioned spring-like structure is integrally connected to the front cover, and both the front cover and the spring-like structure are made of manganese steel or stainless steel.

5. A drill chuck according to claim 1, characterized in that... The drill body is fitted with a bushing on its outer side.

6. A drill chuck according to claim 1 or 5, characterized in that... The front cover is equipped with a retaining spring inside, which is located on the rear side of the retaining spring-like structure. The drill body is provided with a receiving groove that cooperates with the retaining spring. The axial positioning of the drill chuck bushing and / or outer sleeve is achieved by the retaining spring.

7. A drill chuck according to claim 1 or 5, characterized in that... After the snap-fit ​​part is snapped into the snap-fit ​​groove, the snap-fit ​​gap between the snap-fit ​​part and the inner wall of the front cover abuts against the end face of the drill chuck bushing, outer sleeve, drill body, or snap ring.

8. A drill chuck according to claim 1, characterized in that... The front cover has a sealing ring inside, which is fitted onto the drill body on the rear side of the snap ring structure. The sealing ring seals the snap gap between the snap-fit ​​part and the inner wall of the front cover after snap-fit.

9. A drill chuck according to claim 8, characterized in that... The sealing ring is made of non-metallic material.

Images