Tool headstock set

Abstract

The utility model provides a headstock set of a tool machine. The headstock set of the tool machine comprises a base body and a shaft sleeve assembly. The seat body comprises an assembling hole, and the assembling hole defines an axial direction and a radial direction; the shaft sleeve assembly is connected to the base body in the mode that the shaft sleeve assembly is inserted into the assembling hole in the axial direction, the shaft sleeve assembly comprises a shaft sleeve main body and at least one heat insulation body, the shaft sleeve main body is used for being connected with a main shaft in an inserted mode, and the heat insulation bodies are clamped between an outer ring wall of the shaft sleeve main body and a hole wall surrounding the assembling hole in the radial direction. The at least one heat insulator can effectively isolate a large amount of heat from being transmitted to the seat body when the main shaft operates, so that the structural strength of the seat body cannot be weakened or deformed due to heating under the condition of long-time use.

Description

TECHNICAL FIELD

[0001] The utility model relates to a machine tool, especially to a machine tool headstock. BACKGROUND

[0002] Traditionally, people process through hand tools such as chisels, saws, and hammers. With the advent of the industrial revolution, mechanization and electrification, and automation, the types of processing tools have also become more and more diverse, and the processing speed and precision have been continuously improved. Examples of machine tools include, but are not limited to, milling machines, lathes, grinding machines, punch presses, CNC processing machines, and the like.

[0003] However, most processing machines have headstock assemblies to connect the main shaft with a tool. As the use time of such headstock assemblies increases, the structure of the headstock assemblies often deforms, cracks, and decreases in strength and hardness, resulting in undesirable outcomes.

[0004] Therefore, it is necessary to provide a novel and improved machine tool headstock assembly to solve the above problems. SUMMARY

[0005] The main purpose of the utility model is to provide a machine tool headstock assembly. By clamping a heat insulator between the seat body and the shaft sleeve main body, the heat generated during the rotation of the main shaft can be effectively insulated from the seat body. After long-term use, the structural strength of the seat body will not be weakened by heat, and the assembly hole will not be deformed by heat, thereby maintaining the processing precision of the machine tool.

[0006] To achieve the above purpose, the utility model provides a machine tool headstock assembly, which includes a seat body and a shaft sleeve assembly. The seat body includes an assembly hole, which defines an axial direction and a radial direction. The shaft sleeve assembly is connected to the seat body by being inserted into the assembly hole along the axial direction. The shaft sleeve assembly includes a shaft sleeve main body and at least one heat insulator. The shaft sleeve main body is used for inserting the main shaft. The at least one heat insulator is clamped between the outer ring wall of the shaft sleeve main body and the hole wall surrounding the assembly hole in the radial direction.

[0007] As a preferred embodiment of the above technical solution, the number of the at least one heat insulator is one, and the heat insulator is in the form of a tube. The heat insulator is sleeved on the shaft sleeve main body.

[0008] As a preferred embodiment of the above technical solution, the material of the at least one heat insulator is selected from carbon fiber composite material, glass fiber composite material, and ceramic fiber composite material.

[0009] As a preferred embodiment of the above technical solution, at least one groove is formed in at least one of the hole wall and the outer ring wall. A glue is filled in the at least one groove to adhere the at least one heat insulator.

[0010] As a preferred solution of the above technical scheme, preferably, the hole wall and the outer ring wall are respectively provided with a plurality of the grooves, and in the radial direction, the grooves of the hole wall and the grooves of the outer ring wall are arranged in a face-to-face manner.

[0011] As a preferred solution of the above technical scheme, preferably, in the radial direction, the thickness of the at least one thermal insulation body is a first size, the thickness of the part of the sleeve body inserted into the set of connecting holes is a second size, and the first size is greater than the second size.

[0012] As a preferred solution of the above technical scheme, preferably, the sleeve assembly further comprises a plurality of bolts, the sleeve body is provided with a plurality of first through holes in the radial direction, the at least one thermal insulation body is provided with a plurality of second through holes, and the bolts are screwed to the hole wall by penetrating the first through holes and the second through holes.

[0013] As a preferred solution of the above technical scheme, preferably, the bolt comprises a connected body and a head, the first through hole has a hole diameter greater than the radial size of the head, and the head is embedded in the first through hole.

[0014] As a preferred solution of the above technical scheme, preferably, the second through hole comprises a large-diameter section, a small-diameter section, and a step surface, the step surface is transversely connected between the large-diameter section and the small-diameter section, the radial size of the large-diameter section is greater than the radial size of the head, the radial size of the small-diameter section is greater than the radial size of the body, and the head is sunk into the large-diameter section from the first through hole and pressed against the step surface.

[0015] As the preferred technical scheme, preferably, the number of the at least one heat insulation body is one, the heat insulation body is tubular, and the heat insulation body is sleeved on the shaft sleeve body; the material of the at least one heat insulation body is selected from carbon fiber composite material, glass fiber composite material and ceramic fiber composite material; in the radial direction, the thickness of the at least one heat insulation body is a first size, the thickness of the part of the shaft sleeve body inserted into the set of connecting holes is a second size, the first size is greater than the second size; the shaft sleeve assembly further comprises a plurality of bolts, the shaft sleeve body is provided with a plurality of first through holes in the radial direction, the at least one heat insulation body is provided with a plurality of second through holes, and the bolts are screwed into the hole wall by penetrating the first through holes and the second through holes; the bolt comprises a body connected with a head, the diameter of the first through hole is greater than the radial size of the head, and the head is embedded in the first through hole; the second through hole comprises a large-diameter section, a small-diameter section and a step surface, the step surface is transversely connected between the large-diameter section and the small-diameter section, the radial size of the large-diameter section is greater than the radial size of the head, the radial size of the small-diameter section is greater than the radial size of the body, and the head is sunk into the large-diameter section from the first through hole and pressed against the step surface; the shaft sleeve body comprises a ring body and a tube body, the tube body transversely protrudes from one side of the ring body, and the outer wall of the tube body is the outer ring wall; the first through hole is provided in the tube body; the depth of each groove in the radial direction is a third size, the third size is less than the first size, the ratio of the third size to the first size is between 0.02 and 0.2, the ratio of the second size to the first size is between 0.4 and 0.7, the diameter of the first through hole is greater than the radial size of the large-diameter section, the length of the large-diameter section in the radial direction is a fourth size, the fourth size is less than the second size and greater than the third size, the ratio of the fourth size to the second size is between 0.3 and 0.6, the material of the seat body is cast iron, and the shaft sleeve body is medium carbon steel; the seat body further comprises a through opening, the through opening penetrates the hole wall in the radial direction to communicate with the set of connecting holes, and part of the heat insulation body is exposed in the through opening. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 It is a perspective view of an embodiment of the present application.

[0018] Figure 2 It is an exploded view of Figure 1

[0019] ​Figure 3 is a sectional view. Figure 1

[0020] Figure 4 is a partial enlarged view. Figure 3

[0021] 1: a seat body; 11: a set of connecting holes; 12: a hole wall; 13: a through hole; 14: an axial direction; 15: a radial direction; 2: a shaft sleeve assembly; 21: a shaft sleeve body; 22: an outer ring wall; 23: a first through hole; 24: a ring body; 25: a tube body; 3: a heat insulation body; 31: a second through hole; 32: a large hole diameter section; 33: a small hole diameter section; 34: a step surface; 4: a groove; 5: a glue body; 6: a bolt; 61: a head; 62: a body; 71: a first size; 72: a second size; 73: a third size; 74: a fourth size. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0023] The following only illustrates possible implementation manners of the utility model by way of examples, but is not used to limit the scope of the utility model intended to be protected. The noun in the text is not limited in quantity by being prefixed with "one" or "at least one". According to the demand, it can also be "a plurality of". The change in quantity is also the scope intended to be protected. It is stated in advance.

[0024] Please refer to Figures 1 to 4 which shows an embodiment of the utility model. The tool head seat group of the utility model comprises a seat body 1 and a shaft sleeve assembly 2.

[0025] The seat body 1 comprises a set of connecting holes 11, and the set of connecting holes 11 defines an axial direction 14 and a radial direction 15. The shaft sleeve assembly 2 is connected to the seat body 1 by being inserted into the set of connecting holes 11 along the axial direction 14. The shaft sleeve assembly 2 comprises a shaft sleeve body 21 and at least one heat insulation body 3. The shaft sleeve body 21 is used for inserting a main shaft. The at least one heat insulation body 3 is clamped between an outer ring wall 22 of the shaft sleeve body 21 and a hole wall 12 surrounding the set of connecting holes 11 in the radial direction 15.

[0026] ​​By the at least one heat insulating body 3, the heat energy generated during the rotation of the main shaft can be effectively insulated from the seat body 1, so that the structural strength, hardness and the like of the seat body 1 can not be weakened by heat during long-time rotation, and the weight of the main shaft can be reliably supported, and the hole wall 12 of the set of connecting holes 11 can not be deformed by heat, and the shaft sleeve assembly 2 can be reliably clamped, so that the main shaft can be kept stable during machining and can not be arbitrarily shaken, which helps to maintain machining accuracy.

[0027] More specifically, the seat body 1 is made of cast iron, such as FC30, which has a high steel structure and can provide better shock absorption damping and reduce deformation, is durable and has good performance. The shaft sleeve body 21 is made of medium carbon steel, such as S45C, which has high tensile strength, ductility and wear resistance, and is quite suitable for manufacturing various shapes. The material of the at least one heat insulating body 3 is selected from carbon fiber composite material, glass fiber composite material, and ceramic fiber composite material. In this embodiment, carbon fiber composite material is used, so that the at least one heat insulating body 3 has the advantages of light weight, high strength, high heat resistance, low thermal expansion coefficient and the like in addition to the heat insulation function. In this embodiment, the number of the at least one heat insulating body 3 is one, the heat insulating body 3 is tubular, and the heat insulating body 3 is sleeved on the shaft sleeve body 21.

[0028] More specifically, at least one groove 4 is recessed in at least one of the hole wall 12 and the outer ring wall 22, and a glue 5 is filled in the at least one groove 4 to bond the heat insulating body 3. The glue 5 helps to further fix the heat insulating body 3, so that the heat insulating body 3 cannot move relatively and has better bonding stability. In this embodiment, the hole wall 12 and the outer ring wall 22 are respectively provided with a plurality of grooves 4, and on the radial direction 15, the grooves 4 of the hole wall 12 and the grooves 4 of the outer ring wall 22 are arranged face to face.

[0029] Preferably, the shaft sleeve assembly 2 further includes a plurality of bolts 6, the shaft sleeve body 21 is provided with a plurality of first through holes 23 in the radial direction 15, the at least one heat insulating body 3 is provided with a plurality of second through holes 31, and the bolts 6 are screwed into the hole wall 12 by penetrating the first through holes 23 and the second through holes 31. Therefore, the plurality of bolts 6 can stably position the shaft sleeve body 21 and the heat insulating body 3 in the seat body 1. In this embodiment, the shaft sleeve body 21 includes a ring body 24 and a tube body 25, the tube body 25 transversely protrudes on one side of the ring body 24, the outer wall of the tube body 25 is the outer ring wall 22, and the first through holes 23 are provided in the tube body 25.

[0030] In addition, the through hole 13 is provided in the seat body, and the heat insulation body 3 is exposed in the through hole 13. In addition to the effect of assisting heat dissipation, the user can directly observe the heat insulation body 3, so that the user can know the structure state of the heat insulation body 3 through visual observation.

[0031] The bolt 6 comprises a body 62 and a head 61. The diameter of the first through hole 23 is greater than the radial dimension of the head 61, and the head 61 is embedded in the first through hole 23. Specifically, the second through hole 31 comprises a large-diameter section 32, a small-diameter section 33, and a step surface 34. The step surface 34 is transversely connected between the large-diameter section 32 and the small-diameter section 33. The radial dimension of the large-diameter section 32 is greater than the radial dimension of the head 61. The radial dimension of the small-diameter section 33 is greater than the radial dimension of the body 62. The head 61 is embedded in the large-diameter section 32 of the first through hole 23 and is pressed against the step surface 34. The bolt 6 provides a force to the heat insulation body 3, so that the heat insulation body 3 is firmly attached to the hole wall 12. The diameter of the first through hole 23 is greater than the radial dimension of the large-diameter section 32.

[0032] Specifically, in the radial direction 15, the thickness of the heat insulation body 3 is a first dimension 71, and the thickness of the portion of the sleeve body 21 inserted into the set of receiving holes 11 is a second dimension 72. The first dimension 71 is greater than the second dimension 72. For example, but not limited to, the ratio of the second dimension 72 to the first dimension 71 is between 0.4 and 0.7. In order to have a thicker structure of the heat insulation body 3 to improve the heat insulation effect and reduce the overall weight. More specifically, the depth of each groove 4 in the radial direction 15 is a third dimension 73, and the third dimension 73 is less than the first dimension 71. The ratio of the third dimension 73 to the first dimension 71 is between 0.02 and 0.2, so as to ensure the depth of each groove 4.

[0033] In addition, the length of the large-diameter section 32 in the radial direction 15 is a fourth dimension 74, which is less than the second dimension 72 and greater than the third dimension 73. The ratio of the fourth dimension 74 to the second dimension 72 is between 0.3 and 0.6, so as to properly control the depth ratio of the large-diameter section 32.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for part or all of the technical features. The modifications or substitutions do not change the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tool headstock assembly, characterized in that, Comprising: a base body comprising a set of through holes defining an axial direction and a radial direction; and a shaft sleeve assembly connected to the base body along the axial direction and inserted into the set of through holes, comprising a shaft sleeve body for insertion of a main shaft and at least one thermal insulation body clamped between an outer annular wall of the shaft sleeve body and a hole wall surrounding the set of through holes in the radial direction. The at least one thermal insulation body is one, which is tubular and sleeved on the shaft sleeve body.

2. The tool head assembly according to claim 1, characterized in that The material of the at least one thermal insulation body is selected from carbon fiber composite material, glass fiber composite material, and ceramic fiber composite material.

3. The tool head assembly according to claim 1, characterized in that At least one groove is recessed in at least one of the hole wall and the outer annular wall, and a glue is filled in the at least one groove to adhere the at least one thermal insulation body.

4. The tool head assembly according to claim 1, characterized in that The hole wall and the outer annular wall are respectively provided with a plurality of grooves, and in the radial direction, the grooves of the hole wall and the grooves of the outer annular wall are arranged in a face-to-face manner.

5. The tool head assembly according to claim 4, characterized in that In the radial direction, the thickness of the at least one thermal insulation body is a first size, and the thickness of the part of the shaft sleeve body inserted into the set of through holes is a second size, and the first size is greater than the second size.

6. The tool head assembly according to claim 1, characterized in that The shaft sleeve assembly further comprises a plurality of bolts, the shaft sleeve body is provided with a plurality of first through holes in the radial direction, the at least one thermal insulation body is provided with a plurality of second through holes, and the bolts are threaded into the hole wall by penetrating the first through holes and the second through holes.

7. The tool head unit according to any one of claims 1 to 6, characterized in that The bolt comprises a body connected to a head, the diameter of the first through hole is greater than the radial size of the head, and the head is embedded in the first through hole.

8. The tool head assembly according to claim 7, characterized in that The second through hole comprises a large diameter section, a small diameter section, and a step surface transversely connected between the large diameter section and the small diameter section, the radial size of the large diameter section is greater than the radial size of the head, the radial size of the small diameter section is greater than the radial size of the body, and the head is sunk into the large diameter section from the first through hole and pressed against the step surface.

9. The tool head assembly according to claim 8, characterized in that ​ 10. The tool head assembly according to claim 5, characterized in that The at least one heat insulating body is one, is tubular, and is sleeved on the sleeve body; the material of the at least one heat insulating body is selected from carbon fiber composite material, glass fiber composite material, and ceramic fiber composite material; in the radial direction, the thickness of the at least one heat insulating body is a first size, the thickness of the part of the sleeve body inserted into the set of connecting holes is a second size, the first size is greater than the second size; the sleeve assembly further comprises a plurality of bolts, the sleeve body is provided with a plurality of first through holes in the radial direction, the at least one heat insulating body is provided with a plurality of second through holes, and the bolts are screwed into the hole wall by penetrating the first through holes and the second through holes; the bolt comprises a connected body and a head, the diameter of the first through hole is greater than the radial size of the head, and the head is embedded in the first through hole; the second through hole comprises a large-diameter section, a small-diameter section, and a step surface, the step surface is laterally connected between the large-diameter section and the small-diameter section, the radial size of the large-diameter section is greater than the radial size of the head, the radial size of the small-diameter section is greater than the radial size of the body, and the head is sunk into the large-diameter section from the first through hole and pressed against the step surface; the sleeve body comprises a ring body and a tube body, the tube body is laterally protruded on one side of the ring body, and the outer wall of the tube body is the outer ring wall; the first through hole is provided in the tube body; the depth of each groove in the radial direction is a third size, the third size is less than the first size, the ratio of the third size to the first size is between 0.02 and 0.2, the ratio of the second size to the first size is between 0.4 and 0.7, the diameter of the first through hole is greater than the radial size of the large-diameter section, the length of the large-diameter section in the radial direction is a fourth size, the fourth size is less than the second size and greater than the third size, the ratio of the fourth size to the second size is between 0.3 and 0.6, the material of the seat body is cast iron, and the sleeve body is medium carbon steel; the seat body further comprises a through opening, the through opening penetrates the hole wall in the radial direction and communicates the set of connecting holes, and part of the heat insulating body is exposed in the through opening.

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