Knife pouch for accommodating machining tools

Abstract

The utility model relates to a cutter sleeve for accommodating a processing tool. The cutter sleeve comprises a cutter sleeve body, a cutter locking unit, a pressing piece and a fixing means, wherein the peripheral surface of the cutter sleeve body is provided with a mounting surface, and a plurality of radial holes are formed by drilling downwards from the mounting surface; the cutter locking unit comprises a spring and a steel ball which are arranged in each radial hole, the pressing piece is a steel belt, the steel belt is arranged along the installation face and shields the radial holes, the fixing means is used for fixedly connecting the steel belt with the cutter sleeve body, and the steel belt surrounds the cutter sleeve body. Therefore, the defects that in the prior art, a plurality of screws must be used for preventing the steel balls and the springs in all the radial holes from falling off, manpower is consumed in assembly, and the force of the springs for pushing the steel balls is not uniform are overcome.

Description

Technical Field

[0001] The utility model relates to an automatic tool changing mechanism of a machine tool, in particular to a tool sleeve installed on a tool magazine for storing machining tools. Background Art

[0002] The tool magazine in the automatic tool changing mechanism of a machine tool is a device that provides the storage and tool changing requirements needed in the automated machining process. The aforementioned tool magazines are all configured with a plurality of tool sleeves for inserting tool shanks combined with tools of different specifications. In order to prevent the tool shank from being improperly loosened from the tool sleeve, causing damage to the tool shank or the tool, and increasing the industrial safety problems, the known tool sleeves have a tool locking structure, such as the new patents of Taiwan, China Patent No. M563937 "Tool Sleeve Structure with Safety Latching Device", Taiwan, China Patent No. M439538 "Improvement of Tool Sleeve Structure of Machining Center Tool Magazine" and Taiwan, China Patent No. M477934 "Tool Sleeve Device", etc. The tool locking structures of the aforementioned patented technologies include arranging a plurality of radial holes at the rear section of the tool sleeve, placing a steel ball and a spring in each radial hole, and then locking a plurality of screws into each of the radial holes respectively to prevent the steel ball and the spring from falling off; the elastic force of the aforementioned spring pushes the steel ball, forcing the steel ball to tightly abut one end of the tool shank inserted into the tool sleeve, thereby generating a latching effect to achieve the purpose of preventing the tool shank from being improperly loosened.

[0003] It is true that the tool locking structure of the above patent can prevent the tool shank from being improperly loosened. However, due to the depth of each radial hole of the tool sleeve and the part of the space occupied by the screw and the steel ball in the radial hole, only a shorter spring can be selected. The length of the spring refers to the distance between the two ends of the spring before deformation. Therefore, the number of turns of the spiral coil of the shorter spring is relatively small. When the tool shank enters and exits the tool sleeve and pushes the steel ball to move, the steel ball will push and squeeze the spring to cause compression deformation. However, the compression deformation of the spring is achieved through the torsion of each spiral coil. Therefore, when the shorter spring repeatedly bears the extrusion force, it is easy to cause an increase in the load of the spiral coil, especially the spiral coil closer to the steel ball, and its load is more obvious. Over time, the spiral coil will crack and break due to fatigue. In addition, the action of locking a screw into each of the radial holes not only consumes manpower, but also causes uneven force of the spring pushing the steel ball when the depths of the screws locked into each radial hole are different. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a tool sleeve for storing machining tools, which can reduce the load of the spiral coil of the spring in the tool locking structure when encountering the extrusion force, so as to extend the service life of the spring.

[0005] To achieve the above object, the present utility model provides a knife sheath for storing processing tools, which includes a knife sheath body, a knife locking unit and a pressing member. The knife sheath body has an accommodating space and at least one radial hole. The outer peripheral surface of the knife sheath body has an installation surface. The accommodating space can accommodate the processing tool, and the at least one radial hole is arranged radially from the installation surface and communicates with the accommodating space; the knife locking unit includes at least one spring and at least one steel ball. The at least one spring and the at least one steel ball are arranged in the at least one radial hole of the knife sheath body. One end of the at least one spring abuts against the at least one steel ball, so that a partial surface of the at least one steel ball protrudes into the accommodating space; the pressing member is fixedly connected to the knife sheath body. The pressing member has a pressing surface, and the pressing surface contacts the installation surface of the knife sheath body. The other end of the at least one spring abuts against the pressing surface.

[0006] In one embodiment, the pressing member includes a long strip-shaped steel belt. The steel belt has an outer surface and an inner surface opposite to each other. The inner surface constitutes the pressing surface; the knife sheath includes a fixing means for fixedly connecting the steel belt to the knife sheath body, and the steel belt surrounds the knife sheath body.

[0007] In one embodiment, the outer peripheral surface of the knife sheath body has an annular groove. The bottom of the annular groove constitutes the installation surface; the steel belt is located in the annular groove and surrounds the knife sheath body.

[0008] The effect of the present utility model is that on the basis of knife sheaths of the same specification, a spring with a longer length can be selected as a part of the knife locking structure. When the spring bears an extrusion force, due to the longer length of the spring, the extrusion force can be effectively dispersed, so as to extend the service life of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a perspective view of the knife sheath and the processing tool according to the first preferred embodiment of the present utility model;

[0010] Figure 2 is an exploded view of the knife sheath according to the first preferred embodiment of the present utility model;

[0011] Figure 3 is a cross-sectional view of the knife sheath and the processing tool according to the first preferred embodiment of the present utility model;

[0012] Figure 4 is Figure 3 a cross-sectional view taken along the direction 4-4 of

[0013] Figure 5 is a perspective view of the knife sheath body among the knife sheaths according to the first preferred embodiment of the present utility model;

[0014] Figure 6 is Figure 5Cross-sectional view in the 6-6 direction;

[0015] Figure 7 Similar Figure 4 , revealing that a steel strip is fixed to the tool holder body by a fixing member;

[0016] Figure 8 Exploded view of the tool holder of the second preferred embodiment of the present invention;

[0017] Figure 9 Is Figure 8 Cross-sectional view of the tool holder shown;

[0018] Figure 10 Is Figure 9 Cross-sectional view in the 10-10 direction of ;

[0019] Figure 11 Stereogram of the tool holder of the third preferred embodiment of the present invention;

[0020] Figure 12 Is Figure 11 Cross-sectional view of the tool holder shown.

[0021]

Symbol Explanation

[0022] 100, 100A, 100B: Tool holder

[0023] 10, 10A, 10B: Tool holder body

[0024] 11: Tapered hole

[0025] 12: Shaft hole

[0026] 12a: Inner hole section

[0027] 12b: Outer hole section

[0028] 13: Contact surface

[0029] 14: Embedded groove

[0030] 15: Mounting surface

[0031] 15a: Arc section

[0032] 15b: Flat cut section

[0033] 16: Radial hole

[0034] 17: Annular groove

[0035] 18: Fixing hole

[0036] 19: Cutting groove

[0037] 20, 20A: Knife locking unit

[0038] 21: Spring

[0039] 22: Steel ball

[0040] 23: Unlocking part

[0041] 231: Closed end

[0042] 232: Concave hole

[0043] 233: Side opening

[0044] 234: Annular wall

[0045] 24: Stopping part

[0046] 30, 30A, 30B: Steel strip

[0047] 30a: Outer surface

[0048] 30b: Inner surface

[0049] 31: Pressing section

[0050] 31a: Perforation

[0051] 31b: Insert piece

[0052] 40: Fixing part

[0053] 41: Body part

[0054] 41a: Annular deformation part

[0055] 42: Head part

[0056] 200: Processing tool

[0057] 201: End part

[0058] 201a: Contact surface

[0059] D: Concave part

[0060] L: Axis

[0061] O: Overlapping part Detailed implementation manners

[0062] The tool sheath for storing a processing tool of the present utility model is based on the same outer diameter as the existing tool sheath. When the spring in the structure is subjected to extrusion deformation, it can effectively disperse the extrusion force, so as to reduce the load on the spiral coil of the spring, and thus extend the service life of the spring. To more clearly illustrate the present utility model, several preferred embodiments are given below and described in detail with reference to the accompanying drawings. Please first refer to Figures 1 to 4As shown, the tool sheath 100 for accommodating the processing tool 200 according to the first preferred embodiment of the present utility model for achieving the above object includes a tool sheath body 10, a tool locking unit 20, a pressing member, and a fixing means.

[0063] Please refer Figure 5 and Figure 6 , the tool sheath body 10 is generally in the shape of a circular cylinder and has a tapered hole 11 and a shaft hole 12 that communicate with each other. The tapered hole 11 and the shaft hole 12 together constitute the accommodation space defined by the present utility model. The shaft hole 12 is composed of an inner hole section 12a and an outer hole section 12b. The inner hole section 12a communicates with the tapered hole 11 and its aperture is smaller than that of the outer hole section 12b. The tool sheath body 10 forms a bottom surface 13 at the connecting portion of the inner hole section 12a and the outer hole section 12b, and a groove 14 is recessed in the hole wall of the outer hole section 12b. In addition, a virtual axis L passes through the centers of the tapered hole 11 and the shaft hole 12. The processing tool 200 can enter and exit the tapered hole 11 along the axis L. The processing tool 200 in this embodiment is a tool shank that can be combined with a tool.

[0064] The outer peripheral surface of the tool sheath body 10 has a mounting surface 15 and at least one radial hole 16 is arranged radially from the mounting surface 15 and communicates with the shaft hole 12. Please refer Figure 2 and Figure 6 As shown, the tool sheath body 10 is recessed with an annular groove 17 on the outer peripheral surface on the side different from the side where the processing tool 200 is inserted into the tapered hole 11. The bottom of the annular groove 17 constitutes the mounting surface 15. The mounting surface 15 is composed of an arc section 15a and a flat section 15b. The number of the at least one radial hole 16 is multiple and is arranged radially from the arc section 15a at equal intervals and communicates with the inner hole section 12a of the shaft hole 12. It must be noted that the number of the radial holes 16 can be increased or decreased according to requirements in other application examples.

[0065] The lock knife unit 20 includes at least one spring 21, at least one steel ball 22, an unlocking member 23 and a retaining member 24. In this embodiment, the number of springs 21 and steel balls 22 matches the number of the above-mentioned radial holes 16, and one spring 21 and one steel ball 22 are placed in one radial hole 16. The unlocking member 23 is a circular tube that can move along the axis L in the shaft hole 12 of the knife sheath body 10. The unlocking member 23 has a closed end 231, a concave hole 232, at least one side opening 233 and an annular rib 234, wherein the at least one side opening 233 is located on the tube wall and communicates with the concave hole 232. The number of side openings 233 in this embodiment is the same as the number of the above-mentioned radial holes 16, and the annular rib 234 protrudes outward from the tube wall. As for the retaining member 24, it is a C-shaped buckle. After the unlocking member 23 is inserted into the shaft hole 12, it is embedded in the groove 14 of the knife sheath body 10 and fixedly connected to the position of the outer hole section 12b. During the movement of the unlocking member 23, its annular rib 234 can contact the abutting surface 13 or the retaining member 24. The former limits the forward movement stroke of the unlocking member 23, and the latter can prevent the unlocking member 23 from falling off relative to the knife sheath body 10.

[0066] The pressing member is fixedly connected to the knife sheath body 10 and has a pressing surface that can contact the mounting surface 15 of the knife sheath body 10. The pressing member is used to confine the above-mentioned spring 21 and steel ball 22 in the radial hole 16 of the knife sheath body 10. In this embodiment, the pressing member achieves the above-mentioned purpose in cooperation with the fixing means. Please cooperate with Figures 2 to 4 , the pressing member in this embodiment is a long strip-shaped steel belt 30. The steel belt 30 has an outer surface 30a and an inner surface 30b facing each other, wherein the inner surface 30b constitutes the above-mentioned pressing surface; the width of the steel belt 30 is equivalent to the groove width of the annular groove 17 of the knife sheath body 10, and both ends of the steel belt 30 are respectively provided with a bent pressing section 31, and each pressing section 31 has a through hole 31a.

[0067] In this embodiment, the fixing means includes two fixing members 40 and two fixing holes 18 drilled vertically downward from the flat section 15b of the tool holder body 10. Each of the two fixing members 40 has a body portion 41 and a head portion 42 located at one end of the body portion 41. When the steel belt 30 is placed in the annular groove 17 and surrounds the tool holder body 10, the body portion 41 of each fixing member 40 passes through each perforation 31a on the steel belt 30 and is inserted into the corresponding fixing hole 18. When the head portion 42 of each fixing member 40 presses against the outer surface 30a of the steel belt 30, each pressing section 31 of the steel belt 30 will be flat against the flat section 15b of the mounting surface 15. Thus, the steel belt 30 achieves the purpose of fixedly connecting the tool holder body 10 in a surrounding manner, and the steel belt 30 located in the annular groove 17 will not slip relative to the tool holder body 10, effectively ensuring the positions of the spring 21 and the steel balls 22.

[0068] Cooperate with Figure 3 And Figure 4 As can be known from the disclosure of and

[0068] , one end of the spring 21 after assembly abuts against the inner surface 30b (i.e., the pressing surface) of the steel belt 30, and the other end of the spring 21 abuts against the steel balls 22. The elastic force of the spring 21 causes the steel balls 22 to partially pass through the side opening 233 of the unlocking member 23, and a partial surface of the steel balls 22 protrudes into the inner concave hole 232 (equivalent to protruding into the accommodating space). When the tool holder 100 houses the processing tool 200, one end portion 201 of the processing tool 200 protrudes into the inner concave hole 232 of the unlocking member 23, and these steel balls 22 abut against a abutting surface 201a of the end portion 201, so that the processing tool 200 is stably inserted into the tapered hole 11 of the tool holder body 10 to achieve the purpose of locking the processing tool 200. Conversely, by applying force to the closed end 231 of the unlocking member 23, the unlocking member 23 can be pushed towards the processing tool 200. The unlocking member 23 forces these steel balls 22 to move radially outwards and compresses each spring 21 to deform. When these steel balls 22 leave the movement path of the end portion 201 and do not contact the abutting surface 201a of the end portion 201, the processing tool 200 can be easily pulled outwards to achieve the purpose of unlocking.

[0069] The above is the structure and usage description of the tool holder 100. The following will further explain that the design of the present invention can improve the problem of easy fatigue of the spring.

[0070] The pressing part of this embodiment uses a steel strip 30 with tough characteristics. Therefore, on the basis of having the same outer diameter as the existing tool holder, in the radial hole 16 of the tool holder body 10, there is no need to lock screws to prevent the spring 21 and the steel ball 22 from falling off. The situation in the prior art where only a shorter spring can be selected due to the screws occupying part of the space in the radial hole has been eliminated. Therefore, the present utility model can select a longer spring. In other words, the number of turns of the spiral coil of the spring 21 in this embodiment is more. When the spring 21 is subjected to an extrusion force and the spiral coil is twisted, these spiral coils will effectively disperse the extrusion force, reduce the load on each spiral coil, and thus can extend the service life of the spring 21, and consequently improve the stability when the tool holder 100 houses the processing tool 200. In addition, the method of wrapping the tool holder body 10 with a steel strip 30 can not only effectively improve the assembly efficiency, but also make the force of the spring 21 pushing the steel ball 22 in each radial hole 16 tend to be average.

[0071] The above fixing means mainly realizes the purpose of connecting each other by passing a fixing member 40 through the steel strip 30 and the tool holder body 10. In order to strengthen the effect of the fixing member 40 fixing the tool holder body 10, the body part 41 of the fixing member 40 is designed to have a tight fit relationship with the fixing hole 18. Preferably, the body part 41 has an annular deformation part 41a, and the outer diameter of the annular deformation part 41a is larger than the aperture of the fixing hole 18. In a specific application example, the fixing member 40 is a kind of blind rivet. By means of pulling out a core rod of the blind rivet, the body part of the blind rivet is forced to expand and deform from the inside to the outside. The part where the above-mentioned blind rivet is expanded and deformed constitutes the said annular deformation part 41a, whereby the fixing member 40 firmly fixes the tool holder body 10. In addition, in another specific application example, the fixing member 40 can be a kind of bolt, and the fixing hole 18 is a threaded hole, and the purpose of connection and fixation can also be achieved through screw connection means. Furthermore, the above-mentioned fixing member 40 and the fixing hole 18 are taken as two examples, but in practice, only one fixing member 40 and one fixing hole 18 can also be provided. On this premise, the length of the steel strip 30 must be greater than the circumference of the outer peripheral surface of the tool holder body 10, as Figure 7 shown. At this time, the pressing sections 31 at both ends of the steel strip 30 are stacked up and down. A fixing member 40 simultaneously passes through the through holes 31a of each pressing section 31, and the body part 41 of the fixing member 40 directly extends into a corresponding fixing hole 18. Thus, the purpose of firmly fixing the steel strip 30 to the tool holder body 10 can also be achieved.

[0072] Please refer to Figures 8 to 10As shown, the tool holder 100A of the second preferred embodiment of the present utility model has the spring 21 and the steel ball 22 of the locking unit 20 of the above-mentioned first preferred embodiment, but does not have the unlocking member 23 and the blocking member 24. Therefore, the tool holder body 10A of the tool holder 100A also does not have the structure for correspondingly installing the unlocking member 23 and the blocking member 24. In addition, the tool holder body 10A still has the structural features of a tapered hole 11, a shaft hole 12, an installation surface 15, a plurality of radial holes 16, an annular groove 17 and two fixing holes 18 of the above-mentioned embodiment, and the spring 21 and the steel ball 22 are also placed in the radial holes 16. Different from the above-mentioned first preferred embodiment, the tool holder body 10A of this embodiment further has a slotted groove 19, and the steel belt 30A is further inwardly folded at the end of each pressing section 31 to form an inlay 31b. The slotted groove 19 is cut radially from the middle position between the two fixing holes 18 and cuts the installation surface 15. When the steel belt 30A surrounds the tool holder body 10A, each inlay 31b is simultaneously embedded in the slotted groove 19. Thus, when the fixing member 40 passes through the through hole 31a of the steel belt 30A and penetrates into the fixing hole 18 of the tool holder body 10A, the steel belt 30A is not only firmly fixed to the tool holder body 10A, but also because each inlay 31b adheres to the side wall of the slotted groove 19, it can appropriately offset the pulling force that the steel belt 30A may bring due to its recovery characteristics, further ensuring that the hole shape of the through hole 31a of the steel belt 30A will not be deformed. It is worth mentioning that the configuration relationship between the foregoing slotted groove 19 and the inlay 31b is also applicable to the tool holder 100 structure of the first preferred embodiment of the present utility model.

[0073] The fixing means of the tool holders 100 (100A) of the above-mentioned first and second preferred embodiments is to use the fixing member 40 to pass through the through hole 31a of the steel belt 30 (30A) and the fixing hole 18 of the tool holder body 10 (10A), so as to achieve the purpose of fixing the steel belt 30 (30A) to the tool holder body 10 (10A). However, in addition to the above method, the fixing means adopted by the tool holder 100B of the third preferred embodiment of the present utility model is spot welding or pressure welding, as Figure 11 and Figure 12 shown, the tool holder body 10B of the tool holder 100B has a recessed portion D, and its steel belt 30B surrounds the tool holder body 10B and is located in the annular groove 17. The two ends of the steel belt 30B are stacked up and down to form an overlapping portion O. The instrument for performing spot welding or pressure welding can extend into the recessed portion D, and then perform welding or pressure heating operations on the overlapping portion O to make the two ends of the steel belt 30B form a fixed connection.

[0074] As can be understood from the above description, any means capable of wrapping the knife sheath body with a steel strip and confining the spring and steel balls in the radial holes should not be limited to the design of a fixing member cooperating with a fixing hole, or be limited to the technical means of spot welding or pressure welding.

[0075] In the above-described embodiments, the outer peripheral surface of the knife sheath body is recessed with an annular groove to ensure that the steel strip does not slip relative to the knife sheath body. However, it should be noted that on the premise of ensuring that the steel strip does not slide arbitrarily, the structure of the annular groove is not absolutely necessary. For example, when the outer peripheral surface of the knife sheath body is provided with protruding small stoppers, they can also be used to limit the movement of the steel strip. In addition, the bottom of the annular groove in the above-described embodiments has a flat section, and both ends of the steel strip have a pressed section. By attaching the pressed section to the flat section, subsequent fixing members can quickly align for fixing operations. However, in practice, when the bottom of the annular groove does not have a flat section and both ends of the steel strip do not have a pressed section, it does not affect the fixing function of the fixing member.

[0076] The knife sheath body in the above-described embodiments is generally in the shape of a cylinder. Therefore, the mounting surface provided along the outer peripheral surface of the knife sheath body includes an arc section. However, in practice, the knife sheath body is not entirely a cylinder. For example, in the structure of the existing Taiwan, China Patent No. M563937, the part where the spring and steel balls are installed does not have a cylindrical shape. However, in the equivalent variations of the present invention, as long as the mounting surface is provided along the outer peripheral surface of the knife sheath body, whether it is continuously provided or fragmentarily provided, it should be included within the scope of the patent of the present invention.

[0077] In summary, the present invention wraps the knife sheath body with a steel strip and confines the spring and steel balls in the radial holes. This not only improves the deficiencies of the prior art that multiple screws must be used to prevent the steel balls and springs in all radial holes from falling off, thereby resulting in labor-consuming assembly and uneven force of the spring pushing the steel balls, but also eliminates the factor of the screws in the prior art occupying the space of the radial holes. Thus, a longer spring can be selected to reduce the load of the spiral coil, thereby extending the service life of the spring and improving the stability of the knife sheath when storing processing tools. The above is only the preferred and feasible embodiments of the present invention. Any equivalent variations made by applying the description of the present invention and the scope of the patent application should be included within the scope of the patent of the present invention.

Claims

1. A tool sheath for storing processing tools, characterized in that: Include: A tool sleeve body, having a containing space and at least one radial hole, and an outer peripheral surface of the tool sleeve body has a mounting surface, wherein the containing space can accommodate the processing tool, and the at least one radial hole is arranged radially from the mounting surface and communicates with the containing space; A knife locking unit, comprising at least one spring and at least one steel ball, wherein the at least one spring and the at least one steel ball are disposed in the at least one radial hole of the knife sleeve body, wherein one end of the at least one spring abuts against the at least one steel ball so that a portion of the surface of the at least one steel ball protrudes from the accommodating space; as well as A pressing piece is fixedly connected to the knife sleeve body. The pressing piece has a pressing surface, which contacts the mounting surface of the knife sleeve body. The other end of the at least one spring abuts against the pressing surface.

2. The tool sheath for storing processing tools according to claim 1, characterized in that: The pressed part includes a long steel belt having an outer surface and an inner surface opposite to each other, and the inner surface constitutes the pressed surface; the knife sleeve includes a fixing means for fixing the steel belt to the knife sleeve body, and the steel belt surrounds the knife sleeve body.

3. The tool sheath for storing processing tools according to claim 2, characterized in that: The fixing means includes at least one fixing part and at least one fixing hole which are recessed from the mounting surface of the knife sleeve body. The at least one fixing part has a body and a head. The body passes through the steel belt and extends into the at least one fixing hole. The head is located at one end of the body and presses against the outer surface of the steel belt.

4. The tool sheath for storing processing tools according to claim 3, characterized in that: The body of the at least one fixing member is tightly matched with the at least one fixing hole.

5. The tool sheath for storing processing tools according to claim 4, characterized in that: The body of the at least one fixing member has an annular deformation portion, and the outer diameter of the annular deformation portion is larger than the hole diameter of the at least one fixing hole.

6. The tool sheath for storing processing tools according to claim 2, characterized in that: The outer peripheral surface of the knife sleeve body is provided with an annular groove, the bottom of which constitutes the mounting surface; the steel belt is located in the annular groove and surrounds the knife sleeve body.

7. The tool sheath for storing processing tools according to claim 3, characterized in that: The mounting surface of the knife sleeve body has a flat cutting section, and the at least one fixing hole is drilled downward in a manner perpendicular to the flat cutting section; the steel belt has at least one pressing section flat against the flat cutting section, the body of the at least one fixing member passes through the at least one pressing section, and the head presses against the outer surface of the at least one pressing section of the steel belt.

8. The tool sheath for storing processing tools according to any one of claims 2 to 7, characterized in that: The knife sleeve body has a groove which is cut radially from the mounting surface; the steel belt has two different ends which respectively form an insert, and each insert is embedded in the groove.

9. The tool sheath for storing processing tools according to claim 1, characterized in that: The processing tool has an end portion, and the end portion has a supporting surface; the accommodating space of the tool sleeve body includes an axial hole, and the at least one radial hole is connected to the axial hole; the tool locking unit includes an unlocking member that can move in the axial hole, and the unlocking member is a circular tube and has at least one side opening; wherein a portion of the at least one steel ball can pass through the at least one side opening, and when the at least one steel ball contacts the supporting surface of the end portion of the processing tool, the processing tool is restricted from exiting the accommodating space; when the at least one steel ball does not contact the supporting surface of the end portion of the processing tool, the processing tool can be pulled out of the accommodating space.

10. The tool sheath for storing processing tools according to claim 9, characterized in that: The axial hole includes an inner hole section and an outer hole section, the aperture of the inner hole section is smaller than the aperture of the outer hole section, and the tool sleeve body has an abutment surface at the connection position between the inner hole section and the outer hole section; the tool locking unit includes a stopper, which is fixedly connected to the outer hole section, and the unlocking member has an annular wall, which can contact the abutment surface or the stopper.

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