Elastic chuck

Abstract

The elastic chuck comprises a chuck seat sleeve, an elastic clamping sleeve and a tightening component, tightening structures are arranged at the two ends of the elastic clamping sleeve, deformation grooves are formed in the two ends of the elastic clamping sleeve in the axial direction in a staggered mode at intervals, and an inner hole of the elastic clamping sleeve is larger than a piece to be connected in diameter. The elastic clamping sleeve is arranged between the chuck seat sleeve and the tightening component in a sleeved mode, axial tightening and loosening are achieved in the mode that the tightening component and the chuck seat sleeve are connected in a screwed mode, the diameter of an inner hole of the elastic clamping sleeve is reduced when the elastic clamping sleeve is in a pressed state, and the diameter of the inner hole of the elastic clamping sleeve is restored to the original value when the elastic clamping sleeve is in a loosened state. And after direct insertion and installation, the chuck is not firm in clamping, and the problems of loosening, even falling off and the like can occur.

Description

Technical Field

[0001] The utility model relates to the technical field of chucks, in particular to an elastic chuck. Background Technique

[0002] An elastic chuck, also known as a collet, is a quick-change connection and fixing component commonly used in stirrers in scientific and educational instruments, drill and milling machines in medical devices, instrument processing lathes, drill presses and other equipment. It is used to imprison the spindle, drill bit, milling cutter or reinforce the parts that need to be connected. It realizes the quick clamping and loosening of the connecting piece through the internal elastic chuck, improving the efficiency and accuracy of chuck replacement.

[0003] When the existing chuck is actually used, it needs to be installed inside the shaft seat for use. Usually, the installed chuck is fixed by direct plugging. As the chuck operates for a long time, the plugged chuck will become loose, and even fall off in severe cases, lacking stability during use. Therefore, an elastic chuck is needed to improve the stability of the chuck during use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an elastic chuck to solve the problem proposed in the above background technique that when the existing chuck is actually used, it needs to be installed inside the shaft seat for use. Usually, the installed chuck is fixed by direct plugging. As the chuck operates for a long time, the plugged chuck will become loose, and even fall off in severe cases, lacking stability during use.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] An elastic chuck includes a chuck seat sleeve, an elastic clamping sleeve and a tightening component. Tightening structures are provided at both ends of the elastic clamping sleeve. Deformation grooves are arranged at both ends of the elastic clamping sleeve at intervals and misaligned axially. The inner hole of the elastic clamping sleeve is larger than the diameter of the part to be connected. The elastic clamping sleeve is sleeved between the chuck seat sleeve and the tightening component. The tightening component and the chuck seat sleeve are axially tightened and loosened through a screwing connection method. The inner hole diameter of the elastic clamping sleeve decreases when it is in a compressed state and returns to its original value when it is in a relaxed state. An axially positioning and fixing structure is provided on the chuck seat sleeve for connecting the basic part.

[0007] Further, the chuck seat sleeve includes a base and a support cylinder. External threads are provided on the outer surface of the upper end of the support cylinder. The tightening component includes a tightening seat and a tightening cone arranged coaxially. The tightening cone is located above the tightening seat. An internal threaded hole is provided in the tightening seat, and a tightening cone surface is provided in the tightening cone. The tightening component is connected to the external threads at the upper end of the support cylinder through the internal threaded hole in the tightening seat, realizing the axial tightening connection between the tightening component and the chuck seat sleeve.

[0008] Furthermore, the tightening structures provided at both ends of the elastic clamping sleeve are conical structures, and the conical structures at both ends of the elastic clamping sleeve respectively correspond to the inner pressing structures of the chuck seat sleeve and the tightening component. When the tightening component is screwed onto the chuck seat sleeve and the axial dimension decreases, the inner hole diameter of the elastic clamping sleeve decreases; when the tightening component is screwed onto the chuck seat sleeve and the axial dimension increases, the inner hole diameter of the elastic clamping sleeve increases.

[0009] Furthermore, the conical structures provided at both ends of the elastic clamping sleeve are pressing cones with a smaller outer diameter and a larger inner diameter.

[0010] Furthermore, the taper of the pressing cone is 60 - 85 degrees, and dust discharge grooves are provided axially on the pressing cone.

[0011] Furthermore, the axial length of the axially spaced and stagger - deformed grooves provided at both ends of the elastic clamping sleeve is 1 / 5 - 1 / 2 of the axial length of the elastic clamping sleeve.

[0012] Furthermore, the number of axially spaced and stagger - deformed grooves provided at both ends of the elastic clamping sleeve along the circumferential direction is 2 - 6.

[0013] Furthermore, the number of axially spaced and stagger - deformed grooves provided at both ends of the elastic clamping sleeve along the circumferential direction is 3 - 4.

[0014] Furthermore, a tightening structure is provided at one end of the elastic clamping sleeve, and the other end is a reinforcement structure. The reinforcement structure includes an inner groove, a docking groove, a card slot, a docking block, an inner recess, a spring, a moving groove, a moving block, and a clamping block.

[0015] Furthermore, an inner recess is provided inside the docking block, a spring is connected to the inner surface of the inner recess, a clamping block is connected to one end of the outer surface of the spring, and a card slot is provided at one end of the inner surface of the docking groove. The clamping block is connected to the inside of the card slot by means of inlay.

[0016] Furthermore, moving grooves are provided on both sides of the inner surface of the inner recess, moving blocks are connected to both sides of the outer surface of the clamping block, and the moving blocks are connected to the inside of the moving grooves by means of movement.

[0017] Furthermore, it further includes an external - thread ring, and the tightening component is connected to the external thread on the outer surface of the external - thread ring through an internal - thread hole.

[0018] Furthermore, it further includes a protective component. The protective component includes a first rubber ring, a second rubber ring, a fixing block, a fixing groove, an inserting block, and a slot.

[0019] The first rubber ring and the second rubber ring are connected to the inner surface of the inner groove. An inserting block is connected to the middle of the bottom ends of the first rubber ring and the second rubber ring, and a slot is provided at the top of the inner groove. The inserting block is connected to the inside of the slot by means of insertion.

[0020] Furthermore, one side of the outer surface of the first rubber ring is connected with a fixing block, and a fixing groove is formed on one side of the outer surface of the second rubber ring. The fixing block is connected to the inside of the fixing groove by insertion.

[0021] Compared with the prior art, the advantages of the present utility model are as follows:

[0022] The present utility model has two implementation structural modes. The first one includes a chuck seat sleeve, an elastic clamping sleeve and a tightening component. Tightening structures are provided at both ends of the elastic clamping sleeve. Deformation grooves are arranged at both ends of the elastic clamping sleeve at intervals along the axial direction in a staggered manner. The inner hole of the elastic clamping sleeve is larger than the diameter of the to-be-connected component. The elastic clamping sleeve is sleeved between the chuck seat sleeve and the tightening component. The tightening component and the chuck seat sleeve are axially tightened and loosened through a screwing connection method. When the elastic clamping sleeve is in a compressed state, the inner hole diameter decreases, and when in a relaxed state, the inner hole diameter returns to the original value.

[0023] This structural mode is a direct connection structure. As long as the basic connecting component is inserted into the inner hole of the chuck seat sleeve, the connecting basic component is axially positioned and fixed through the axially positioning and fixing structure provided on the chuck seat sleeve. The to-be-connected component is inserted into the inner hole at the upper end of the elastic clamping sleeve. Axial tightening is achieved through the screwing connection method between the tightening component and the chuck seat sleeve, so as to achieve tightening and clamping of the to-be-connected component.

[0024] For the second structure of the present utility model, a butting block is arranged inside the inner groove, and a butting groove is formed at the bottom of the elastic chuck. When the elastic clamping sleeve is in use, the elastic clamping sleeve is embedded inside the inner groove, and the butting block is inserted into the inside of the butting groove for fixation. The clamping block expands and contracts inside the inner groove under the elastic force generated by the spring. When the clamping block abuts against the clamping groove, the spring rebounds, so that the clamping block is clamped inside the clamping groove to reinforce the inserted butting block. In this way, when the elastic clamping sleeve operates for a long time, the phenomenon that the elastic clamping sleeve loosens or even falls off can be avoided, and the stability of the elastic clamping sleeve during use is improved.

[0025] By arranging a first rubber ring and a second rubber ring inside the inner groove, and inserting the inserting block into the inside of the inserting slot, the first rubber ring and the second rubber ring are installed and fitted on the inner wall of the inner groove. After the elastic clamping sleeve is installed inside the inner groove, the outer surface of the elastic clamping sleeve will directly be in contact with the first rubber ring and the second rubber ring, avoiding the direct contact between the elastic clamping sleeve and the inner wall of the inner groove, and the first rubber ring and the second rubber ring can achieve the effect of preventing wear on the inner groove. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0028] Figure 2 Axial sectional structure schematic diagram of Embodiment 1 of the present utility model;

[0029] Figure 3 is Figure 2 A schematic diagram of a structure of the elastic clamping sleeve in;

[0030] Figure 4 Stereogram after removing the tightening component in Embodiment 2;

[0031] Figure 5 is Figure 4 Axial sectional structure schematic diagram of;

[0032] Figure 6 is Figure 5 Axial sectional structure schematic diagram of the elastic flat holding sleeve in;

[0033] Figure 7 is Figure 5 Stereogram of the elastic flat holding sleeve in;

[0034] Figure 8 is Figure 4 Structure schematic diagram after removing the elastic clamping sleeve;

[0035] Figure 9 is Figure 8 Bottom view of;

[0036] In the figure: 1 - chuck seat sleeve; 11 - base; 12 - support cylinder; 2 - elastic clamping sleeve; 21 - tightening structure; 22 - deformation groove; 23 - inner hole; 24 - dust discharge groove; 3 - tightening component; 31 - tightening seat; 32 - tightening cone; 41 - inner groove; 42 - docking groove; 43 - card slot; 44 - docking block; 45 - inner groove; 46 - spring; 47 - moving groove; 48 - moving block; 49 - card block; 51 - first rubber ring; 52 - second rubber ring; 53 - fixing block; 54 - fixing groove; 55 - inserting block; 56 - inserting slot; 6 - axial positioning and fixing structure; 7 - external thread ring. Specific embodiments

[0037] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0038] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0039] In order to make the purpose, technical solution, and advantages of the present utility model clearer, the following will further describe in detail the

[0040] embodiments of the present utility model with reference to the accompanying drawings.

[0041] Embodiment 1: An elastic chuck. Please refer to Figures 1 - 3 As shown, it includes a chuck seat sleeve 1, an elastic clamping sleeve 2, and a tightening member 3. At both ends of the elastic clamping sleeve 2, there are tightening structures 21. Along the axial direction at both ends of the elastic clamping sleeve 2, deformation grooves 22 are arranged at intervals and offset. The inner hole 23 of the elastic clamping sleeve 2 is larger than the diameter of the component to be connected. The elastic clamping sleeve 2 is sleeved between the chuck seat sleeve 1 and the tightening member 3. The tightening member 3 and the chuck seat sleeve 1 are axially tightened and loosened through a screwing connection method. When the elastic clamping sleeve 2 is in a compressed state, the inner hole diameter decreases, and when in a relaxed state, the inner hole diameter returns to its original value. On the chuck seat sleeve 1, there is an axial positioning and fixing structure 6 for connecting the base component.

[0042] In this example, the chuck seat sleeve 1 includes a base 11 and a support cylinder 12. On the outer surface of the upper end of the support cylinder 12, there is an external thread. The tightening member 3 includes a tightening seat 31 and a tightening cone 32 arranged coaxially. The tightening cone 32 is located above the tightening seat 31. The tightening seat 31 is provided with an internal threaded hole, and a tightening cone surface is provided inside the tightening cone 32. The tightening member 3 is connected to the external thread at the upper end of the support cylinder 12 through the internal threaded hole on the tightening seat 31 to achieve axial tightening connection between the tightening member 3 and the chuck seat sleeve 1.

[0043] The tightening structures 21 provided at both ends of the elastic clamping sleeve 2 are pressing conical surfaces, and the taper of the pressing conical surfaces is 60 to 85 degrees. The pressing conical surfaces at both ends of the elastic clamping sleeve 2 respectively correspond to the internal pressing structures of the chuck seat sleeve 1 and the tightening member 3. When the tightening member 3 is screwed onto the chuck seat sleeve 1 and the axial dimension decreases, the inner hole diameter of the elastic clamping sleeve 2 decreases; when the tightening member 3 is screwed onto the chuck seat sleeve 1 and the axial dimension increases, the inner hole diameter of the elastic clamping sleeve 2 increases. The axial length of the axially spaced and staggered deformation grooves 22 provided at both ends of the elastic clamping sleeve 2 is 1 / 5 to 1 / 2 of the axial length of the elastic clamping sleeve 2. The number of the axially spaced and staggered deformation grooves 22 provided at both ends of the elastic clamping sleeve 2 in the circumferential direction is 3 to 4.

[0044] As an optimization of Embodiment 1, dust discharge grooves 24 are provided axially on the pressing conical surfaces.

[0045] Embodiment 2: An elastic chuck, please refer to Figure 1 、 Figures 4 - 9 ,

[0046] An elastic chuck includes a chuck seat sleeve 1, an elastic clamping sleeve 2, and a tightening member 3. Tightening structures 21 are provided at both ends of the elastic clamping sleeve 2. Axially spaced and staggered deformation grooves 22 are provided at both ends of the elastic clamping sleeve 2. The inner hole 23 of the elastic clamping sleeve 2 is larger than the diameter of the to-be-connected member. The elastic clamping sleeve 2 is sleeved between the chuck seat sleeve 1 and the tightening member 3. The tightening member 3 and the chuck seat sleeve 1 are axially tightened and loosened by screwing. The inner hole diameter of the elastic clamping sleeve 2 decreases when in a compressed state and returns to the original value when in a relaxed state. An axially positioning and fixing structure 6 is provided on the chuck seat sleeve 1 for connecting the base member. In this example, a tightening structure 21 is provided at one end of the elastic clamping sleeve 2, and the other end is a reinforcement structure. The reinforcement structure includes an inner groove 41, a docking groove 42, a clamping groove 43, a docking block 44, an inner recess 45, a spring 46, a moving groove 47, a moving block 48, and a clamping block 49. An inner recess 45 is formed inside the docking block 44. A spring 46 is connected to the inner surface of the inner recess 45. One end of the outer surface of the spring 46 is connected to a clamping block 49. A clamping groove 43 is formed at one end of the inner surface of the docking groove 42. The clamping block 49 is connected to the inside of the clamping groove 43 by embedding. Moving grooves 47 are formed on both sides of the inner surface of the inner recess 45. Moving blocks 48 are connected to both sides of the outer surface of the clamping block 49. The moving blocks 48 are movably connected to the inside of the moving grooves 47.

[0047] Embodiment 3: On the basis of Embodiment 2, it further includes an external thread ring 7 and a protection component. The tightening component 3 is connected to the external thread on the outer surface of the external thread ring 7 through an internal thread hole; the protection component includes a first rubber ring 51, a second rubber ring 52, a fixing block 53, a fixing groove 54, an inserting block 55 and a slot 56; the first rubber ring 51 and the second rubber ring 52 are connected to the inner surface of the inner groove 41. In the middle of the bottom ends of the first rubber ring 51 and the second rubber ring 52, there is an inserting block 55. A slot 56 is opened at the top of the inner groove 41. The inserting block 55 is connected to the inside of the slot 56 by insertion; on one side of the outer surface of the first rubber ring 51, there is a fixing block 53. On one side of the outer surface of the second rubber ring 52, there is a fixing groove 54. The fixing block 53 is connected to the inside of the fixing groove 54 by insertion.

[0048] The first structure of the present utility model is a direct connection structure. As long as the basic connecting piece is inserted into the inner hole of the collet seat sleeve 1, the connecting basic piece is axially positioned and fixed through the axially positioning and fixing structure 6 provided on the collet seat sleeve 1. The connecting piece to be connected is inserted into the inner hole at the upper end of the elastic clamping sleeve 2. Axial tightening is achieved through the screwing connection between the tightening component 3 and the collet seat sleeve 1, so as to achieve tightening and clamping of the connecting piece to be connected.

[0049] For the second structure of the present utility model, a docking block 44 is provided inside the inner groove 41, and a docking groove 42 is opened at the bottom of the elastic collet 2. When the elastic clamping sleeve 2 is in use, the elastic clamping sleeve 2 is embedded inside the inner groove 41, and the docking block 44 is inserted into the inside of the docking groove 42 for fixation. The clamping block 49 expands and contracts inside the inner groove 41 by the elastic force generated by the spring 46. When the clamping block 49 docks with the card slot 43, the spring 46 rebounds, so that the clamping block 49 is clamped inside the card slot 43 to reinforce the inserted docking block 44. In this way, when the elastic clamping sleeve 2 operates for a long time, the phenomenon that the elastic clamping sleeve 2 loosens or even falls off can be avoided, and the stability of the elastic clamping sleeve 2 during use is improved.

[0050] By providing a first rubber ring 51 and a second rubber ring 52 inside the inner groove 41, and inserting the inserting block 55 into the inside of the slot 56, the first rubber ring 51 and the second rubber ring 52 are installed and fitted on the inner wall of the inner groove 41. After the elastic clamping sleeve 2 is installed inside the inner groove 41, the outer surface of the elastic clamping sleeve 2 will directly fit with the first rubber ring 51 and the second rubber ring 52, avoiding the direct contact between the elastic clamping sleeve 2 and the inner wall of the inner groove 41, and using the first rubber ring 51 and the second rubber ring 52 to achieve the effect of preventing wear on the inner groove 41.

[0051] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An elastic chuck, characterized in that: It includes a chuck seat sleeve (1), an elastic clamping sleeve (2) and a tightening component (3). Tightening structures (21) are provided at both ends of the elastic clamping sleeve (2). Deformation grooves (22) are arranged at both ends of the elastic clamping sleeve (2) at intervals along the axial direction and are offset. The inner hole (23) of the elastic clamping sleeve (2) is larger than the diameter of the component to be connected. The elastic clamping sleeve (2) is sleeved between the chuck seat sleeve (1) and the tightening component (3). The tightening component (3) and the chuck seat sleeve (1) are axially tightened and loosened through a screwing connection method. When the elastic clamping sleeve (2) is in a compressed state, the diameter of the inner hole decreases, and when it is in a relaxed state, the diameter of the inner hole returns to its original value. An axial positioning and fixing structure (6) is provided on the chuck seat sleeve (1) for connecting to the base component.

2. The elastic chuck according to claim 1, characterized in that: The chuck seat sleeve (1) includes a base (11) and a support cylinder (12). An external thread is provided on the outer surface of the upper end of the support cylinder (12). The tightening component (3) includes a tightening seat (31) and a tightening cone (32) arranged coaxially. The tightening cone (32) is located above the tightening seat (31). An internal thread hole is provided in the tightening seat (31), and a tightening cone surface is provided in the tightening cone (32). The tightening component (3) is connected to the external thread at the upper end of the support cylinder (12) through the internal thread hole in the tightening seat (31) to achieve an axially tightened connection between the tightening component (3) and the chuck seat sleeve (1).

3. The elastic collet according to claim 1, characterized in that: The tightening structures (21) provided at both ends of the elastic clamping sleeve (2) are conical surface structures. The conical surface structures at both ends of the elastic clamping sleeve (2) respectively correspond to the internal pressing structures of the chuck seat sleeve (1) and the tightening component (3). When the tightening component (3) is screwed onto the chuck seat sleeve (1) and the axial dimension decreases, the diameter of the inner hole of the elastic clamping sleeve (2) decreases. When the tightening component (3) is screwed onto the chuck seat sleeve (1) and the axial dimension increases, the diameter of the inner hole of the elastic clamping sleeve (2) becomes larger.

4. The elastic chuck according to claim 3, characterized in that: The conical surface structure is a pressing conical surface with a smaller outer diameter and a larger inner diameter. The taper of the pressing conical surface is 60 - 85 degrees. Dust discharge grooves (24) are provided along the axial direction on the pressing conical surface.

5. The elastic collet according to claim 1, characterized in that: The axial length of the deformation grooves (22) arranged at both ends of the elastic clamping sleeve (2) at intervals along the axial direction and offset is 1 / 5 - 1 / 2 of the axial length of the elastic clamping sleeve (2). The number of deformation grooves (22) along the circumferential direction is 2 - 6.

6. The elastic collet according to claim 1, characterized in that: at One end of the elastic clamping sleeve (2) is provided with a tightening structure (21), and the other end is a reinforcement structure. The reinforcement structure includes an inner groove (41), a docking groove (42), a clamping groove (43), a docking block (44), an inner recess (45), a spring (46), a moving groove (47), a moving block (48) and a clamping block (49).

7. An elastic collet according to claim 6, characterized in that: An inner groove (45) is formed inside the docking block (44). A spring (46) is connected to the inner surface of the inner groove (45). One end of the outer surface of the spring (46) is connected to a clamping block (49). A clamping groove (43) is formed at one end of the inner surface of the docking groove (42). The clamping block (49) is connected to the inside of the clamping groove (43) in an embedded manner. Moving grooves (47) are formed on both sides of the inner surface of the inner groove (45). Moving blocks (48) are connected to both sides of the outer surface of the clamping block (49). The moving blocks (48) are movably connected to the inside of the moving grooves (47).

8. The elastic collet according to claim 1, characterized in that: It further includes an external thread ring (7). The tightening member (3) is connected to the external thread of the external thread ring (7) through an internal thread hole.

9. An elastic chuck according to claim 1, characterized in that: It further includes a protection member. The protection member includes a first rubber ring (51), a second rubber ring (52), a fixing block (53), a fixing groove (54), an inserting block (55) and an inserting slot (56). The first rubber ring (51) and the second rubber ring (52) are connected to the inner surface of the inner groove (41). The middle parts of the bottoms of the first rubber ring (51) and the second rubber ring (52) are connected to the inserting block (55). An inserting slot (56) is formed at the top of the inner groove (41). The inserting block (55) is connected to the inside of the inserting slot (56) in an inserting manner.

10. An elastic collet according to claim 9, characterized in that: One side of the outer surface of the first rubber ring (51) is connected to a fixing block (53). A fixing groove (54) is formed on one side of the outer surface of the second rubber ring (52). The fixing block (53) is connected to the inside of the fixing groove (54) in an inserting manner.

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