CN215317992U - Grinding head - Google Patents

Abstract

The utility model discloses a grinding head which comprises a support fixing seat, a movable fixing seat mounting groove, a movable fixing seat, a grinding wheel placing groove, a left shaft hole, a right shaft hole, a main shaft core, a bearing group, a shaft sleeve, a belt pulley, a grinding wheel, a locking nut, a main shaft positioning plate, a central hole, a main shaft positioning bolt, a first vent hole, a main shaft spacer ring, a second vent hole, a left bearing gland, a right bearing gland, a protection cavity, an exhaust passage, a first gap, a gas pipe connector and a gas pipe. The utility model can precisely grind and process the deep hole of the product with internal teeth, special-shaped holes and internal grooves, and ensures the precision size and the roughness required by high light of the product; the heat generated by the high rotating speed of the grinding head mechanism can be effectively taken away through the cooling of the shaft core, and the precision is ensured not to be influenced by thermal expansion; the air curtain protection formed by the left side and the right side of the bearing group can effectively protect the grinding head mechanism from entering the bearing group when grinding liquid and product slag chips, so that the service life of the bearing group is effectively protected.

Description

Grinding head

Technical Field

The utility model relates to the technical field of machining, in particular to a grinding head.

Background

At present, the machining precision of the conventional grinding head on the internal teeth, the special-shaped holes and the internal grooves for deep hole machining of a workpiece is poor, the roughness requirement cannot be met, and the heat generated by the grinding head in high-speed operation cannot be timely discharged, so that the precision is influenced by the thermal expansion of a product; grinding fluid and product slag chips of the grinding head during grinding easily enter a bearing of the grinding head, and the service life of the bearing is influenced.

Therefore, improvements must be made to the above drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a grinding head to solve the problems in the background technology.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a grinding head comprises a bracket fixing seat, wherein a movable fixing seat mounting groove is arranged on the right end face of the bracket fixing seat, a movable fixing seat is arranged in the movable fixing seat mounting groove, a grinding wheel placing groove which is recessed downwards is arranged on the upper end face of the bracket fixing seat, the right end of the grinding wheel placing groove is communicated with the upper end of the movable fixing seat mounting groove, a left shaft hole communicated with the grinding wheel placing groove is arranged on the upper portion of the left end face of the bracket fixing seat, a right shaft hole corresponding to the left shaft hole is arranged on the upper end of the movable fixing seat, the right shaft hole penetrates through the movable fixing seat leftwards and rightwards, the left shaft hole and the right shaft hole are connected through a main shaft core, a bearing group is sleeved on the main shaft core, a shaft sleeve is sleeved on the bearing group, a belt pulley is sleeved on the left end of the shaft sleeve, a grinding wheel is sleeved on the shaft sleeve on the right side of the belt pulley, and a locking nut used for fastening the grinding wheel is arranged on the right side of the grinding wheel, a main shaft positioning plate which is matched and positioned with the main shaft core is arranged in the left shaft hole on the left side of the main shaft core, a central hole is arranged in the middle of the main shaft core, the main shaft core penetrates through the left side and the right side of the central hole, the main shaft positioning plate is connected with the left end of the central hole through a main shaft positioning bolt, a plurality of first vent holes which are uniformly arranged around the central hole are arranged at the left end and the right end of the main shaft core, main shaft spacer rings which are sleeved on the main shaft core are arranged at the left side and the right side of the bearing group, second vent holes which are communicated with the first vent holes are arranged at the left side and the right side of the main shaft core, a left bearing gland and a right bearing gland are respectively arranged at the left side and the right side of the bearing group, protection cavities are arranged between the bearing group and the left bearing gland and between the bearing group and the right bearing gland, and the second vent holes at the left side and the right side are communicated with the corresponding protection cavities, an exhaust channel communicated with the corresponding first air vent is arranged between the left bearing gland and the main shaft spacer ring and between the right bearing gland and the main shaft spacer ring, first gaps communicated with the corresponding exhaust channel are arranged between the left bearing gland and the left end face of the grinding wheel containing groove and between the right bearing gland and the movable fixing seat, a central hole right port is connected with an air pipe joint, and an air pipe is externally connected to the air pipe joint.

Further, the bearing set comprises two bearings side by side.

Further, the belt pulley and the shaft sleeve are integrally processed and molded.

Further, the belt pulley, the shaft sleeve and the right bearing gland are integrally processed and formed.

Further, the diameter of the grinding wheel is larger than that of the belt pulley.

Furthermore, belt grooves matched with the belt pulleys are formed in the front end and the rear end of the support fixing seat.

Furthermore, the air pipe joint is a plane right-angle joint.

Furthermore, the front lower end of the bracket fixing seat and the rear lower end of the bracket fixing seat are provided with grinding wheel retaining pieces matched with the grinding wheels.

Furthermore, two main shaft spacer ring outer ends all are equipped with first L type hook, left side bearing gland inner with right side bearing gland inner all be equipped with correspond first L type hook matched with second L type hook, first L type hook with be equipped with the second clearance between the second L type hook.

Further, the second vent hole penetrates through the spindle spacer ring and the first L-shaped hook up and down.

The utility model has the beneficial effects that:

1. the deep hole of the product can be precisely ground by internal teeth, special-shaped holes and internal grooves, so that the precision size and the roughness required by high light of the product are ensured;

2. the heat generated by the high rotating speed of the grinding head mechanism can be effectively taken away through the cooling of the shaft core, and the precision is ensured not to be influenced by thermal expansion;

3. the air curtain protection formed by the left side and the right side of the bearing group can effectively protect the grinding head mechanism from entering the bearing group when grinding liquid and product slag chips, so that the service life of the bearing group is effectively protected.

Drawings

Fig. 1 is a schematic front view of a grinding head according to an embodiment of the utility model;

fig. 2 is a right side structural schematic view of one embodiment of a grinding head of the present invention;

FIG. 3 is a schematic sectional view A-A of FIG. 2;

FIG. 4 is an enlarged view of B in FIG. 3;

fig. 5 is a schematic perspective view of a grinding head according to an embodiment of the utility model;

fig. 6 is a schematic perspective view of a second grinding head according to an embodiment of the present invention.

Figures and their description:

1. a bracket fixing seat; 2. a movable fixed seat; 3. a belt pulley; 4. a spindle core; 5. a main shaft spacer ring; 6. A left bearing gland; 7. a first gap; 8. a bearing; 9. a grinding wheel; 10. a protection cavity; 11. locking the nut; 12. a first L-shaped hook; 13. a second gap; 14. a gas pipe joint; 15. a second L-shaped hook; 16. an exhaust passage; 17. a second vent hole; 18. a shaft sleeve; 19. a left bearing gland; 20. a main shaft positioning plate; 21. a first vent hole; 22. an air tube; 23. connecting holes; 24. a central bore; 25. a spindle positioning bolt; 26. A grinding wheel baffle plate; 27. a trachea pressing plate; 28. a belt groove; 29. and a right bearing gland.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 6, the grinding head provided by the utility model comprises a bracket fixing seat 1, wherein a movable fixing seat mounting groove is arranged on the right end surface of the bracket fixing seat 1, a movable fixing seat 2 is arranged in the movable fixing seat mounting groove, a grinding wheel placing groove which is recessed downwards is arranged on the upper end surface of the bracket fixing seat 1, the right end of the grinding wheel placing groove is communicated with the upper end of the movable fixing seat mounting groove, a left shaft hole communicated with the grinding wheel placing groove is arranged on the upper portion of the left end surface of the bracket fixing seat 1, a right shaft hole corresponding to the left shaft hole is arranged on the upper end of the movable fixing seat 2, the right shaft hole penetrates through the movable fixing seat 2 from left to right, the left shaft hole and the right shaft hole are connected through a main shaft core 4, a bearing group is sleeved on the main shaft core 4, a shaft sleeve 18 is sleeved on the bearing group, and a belt pulley 3 is sleeved on the left end of the shaft sleeve 18, a grinding wheel 9 is sleeved on the shaft sleeve 18 on the right side of the belt pulley 3, a lock nut 11 for fastening the grinding wheel 9 is arranged on the right side of the grinding wheel 9, a spindle positioning plate 20 matched and positioned with the spindle shaft core 4 is arranged in the left shaft hole on the left side of the spindle shaft core 4, a central hole 24 is arranged in the middle of the spindle shaft core 4, the spindle shaft core 4 penetrates through the central hole 24 from left to right, the spindle positioning plate 20 is connected with the left end of the central hole 24 through a spindle positioning bolt 25, a plurality of first vent holes 21 uniformly surrounding the central hole 24 are arranged at the left end and the right end of the spindle shaft core 4, spindle spacer rings 5 sleeved on the spindle shaft core 4 are arranged at the left side and the right side of the bearing group, second vent holes 17 communicated with the first vent holes 21 are arranged at the spindle spacer rings 5 at the left side and the right side, a left bearing gland 19 and a right bearing gland 29 are respectively arranged at the left side and the right side of the bearing group, the bearing group with between the left bearing gland 19 and all be equipped with protection chamber 10 between bearing group and the right bearing gland 29, the left and right sides the second air vent 17 all with correspond protection chamber 10 intercommunication, left side bearing gland 19 with between the main shaft spacer ring 5, right side bearing gland 29 with between the main shaft spacer ring 5 all be equipped with corresponding the exhaust passage 16 of first air vent 21 intercommunication, left side bearing gland 19 with between the emery wheel standing groove left end face, right side bearing gland 29 with between the activity fixing base 2 all be equipped with corresponding first clearance 7 of exhaust passage 16 intercommunication, centre bore 24 right-hand member mouth is connected with air pipe joint 14, external trachea 22 that has on the air pipe joint 14.

According to the technical scheme, the center hole 24 is formed in the middle of the spindle core, the right end of the center hole 24 is connected with the air pipe joint 14, air is fed into the center hole 24 through the externally-connected air pipe 22, and then is discharged through the first vent hole 21, so that heat generated by high rotating speed of the grinding head mechanism is taken away, and the precision is guaranteed against the influence of thermal expansion; the first ventilation holes 21 at each end may be provided in a number of four, six, eight, ten or more.

A part of gas after passing through the first vent hole 21 enters the protection cavity 10 through the second vent hole 17 and the second gap 13, and grinding fluid and product slag chips can be effectively protected from entering the bearing set during grinding of the grinding head mechanism through gas curtain protection formed in the protection cavity 10, so that the service life of the bearing set is effectively protected; another part of the gas after passing through the first vent hole 21 is discharged through the exhaust channel 16 and the first gap 7 to take away heat, so that the grinding head is protected.

The whole bracket fixing seat 1 is cylindrical, so that the bracket fixing seat can conveniently work in a machining hole of a machined part. The bottom surface of the support fixing seat 1 is provided with the connecting hole 23, the grinding head can be used as the grinding head, when the grinding head is used, the whole grinding head is fixed on a movable (containing an X axis, a Y axis and a Z axis) three-axis mechanism through the connecting hole 23, the external motor drives the belt pulley on the shaft sleeve to drive the grinding wheel to carry out a grinding process on a workpiece through a belt, and the internal tooth, the special-shaped hole and the internal groove of a product can be precisely ground, so that the precision size of the product and the roughness required by high light are ensured. The product can also be used as a rotary table, so that the use of the product can be increased.

In some embodiments, the bearing set comprises two bearings 8 side by side. Therefore, the bearing set can rotate more stably, and the service performance of the grinding head is improved.

For example, in some embodiments, the pulley 3 and the sleeve 18 are integrally formed. Therefore, the belt pulley 3 and the shaft sleeve 18 can be connected together, the assembly process is reduced, the cost is reduced, and the transmission performance of the belt pulley is improved.

For example, in some embodiments, the pulley 3, the bushing 18, and the right bearing cover 29 are integrally formed. Therefore, the assembly process can be reduced, the cost is reduced, and the service performance of the grinding head is improved.

For example, in some embodiments, the grinding wheel 9 has a diameter greater than the diameter of the pulley 3. Therefore, the belt pulley 3 can not touch the inner wall of the processing hole of the workpiece in the hole rotating process.

For example, in some embodiments, the bracket fixing base 1 is provided with belt grooves at both front and rear ends thereof for cooperating with the pulley 3. Can avoid installing the belt on belt pulley 3 like this and leading to the belt to damage with other object contact in the course of the work, can set up littleer belt pulley 3 like this, make whole bistrique can design littleer, the processing of the aperture of being convenient for.

For example, in some embodiments, the air line connector 14 is a planar right angle connector. Therefore, the whole occupied space is smaller, and the grinding head can work conveniently.

For example, in some embodiments, the front lower end of the holder fixing seat 1 and the rear lower end of the holder fixing seat are both provided with grinding wheel stoppers 26 which are matched with the grinding wheel 9. Therefore, the ground product slag can be blocked in the working process, and the damage to the human body caused by direct outward ejection is avoided.

For example, in some embodiments, the outer ends of the two spindle spacers 5 are provided with first L-shaped hooks 12, the inner ends of the left bearing cover 19 and the right bearing cover 29 are provided with second L-shaped hooks 15 corresponding to the first L-shaped hooks 12, and a second gap is provided between the first L-shaped hooks 12 and the second L-shaped hooks 15. The second vent hole penetrates through the main shaft spacer ring and the first L-shaped hook up and down. First L type hook 12 and second L type hook 15 are for hanging the setting upside down, and second clearance 13 communicates with second venthole 17 and protection chamber 10 respectively, and the scope that can the air curtain protection is bigger like this, can be better protect bearing 8.

In conclusion, the utility model can precisely grind the deep hole of the product into the internal tooth, the special-shaped hole and the internal groove, thereby ensuring the precision size of the product and the roughness required by high light; the heat generated by the high rotating speed of the grinding head mechanism can be effectively taken away through the cooling of the shaft core, and the precision is ensured not to be influenced by thermal expansion; the air curtain protection formed by the left side and the right side of the bearing group can effectively protect the grinding head mechanism from entering the bearing group when grinding liquid and product slag chips, so that the service life of the bearing group is effectively protected.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims (10)

1. A grinding head is characterized by comprising a bracket fixing seat, wherein a movable fixing seat mounting groove is arranged on the right end face of the bracket fixing seat, a movable fixing seat is arranged in the movable fixing seat mounting groove, a downwards-recessed grinding wheel placing groove is arranged on the upper end face of the bracket fixing seat, the right end of the grinding wheel placing groove is communicated with the upper end of the movable fixing seat mounting groove, a left shaft hole communicated with the grinding wheel placing groove is arranged on the upper portion of the left end face of the bracket fixing seat, a right shaft hole corresponding to the left shaft hole is arranged on the upper end of the movable fixing seat, the right shaft hole penetrates through the movable fixing seat from left to right, the left shaft hole and the right shaft hole are connected through a main shaft core, a bearing group is sleeved on the main shaft core, a shaft sleeve is sleeved on the bearing group, a belt pulley is sleeved on the left end of the shaft sleeve, a grinding wheel is sleeved on the shaft sleeve on the right side of the belt pulley, a locking nut used for fastening the grinding wheel is arranged on the right side of the grinding wheel, a main shaft positioning plate matched with and positioned at the main shaft core is arranged in the left shaft hole on the left side of the main shaft core, a central hole is arranged in the middle of the main shaft core, the central hole penetrates through the main shaft core left and right, the main shaft positioning plate is connected with the left end of the central hole through a main shaft positioning bolt, a plurality of first vent holes uniformly surrounding the central hole are arranged at the left end and the right end of the main shaft core, main shaft spacing rings sleeved on the main shaft core are arranged at the left side and the right side of the bearing group, second vent holes communicated with the first vent holes are arranged at the main shaft spacing rings at the left side and the right side, a left bearing gland and a right bearing gland are respectively arranged at the left side and the right side of the bearing group, and a protection cavity is arranged between the bearing group and the left bearing gland and between the bearing group and the right bearing gland, the second air vents on the left side and the right side are communicated with the corresponding protection cavities, exhaust channels communicated with the first air vents are arranged between the left bearing gland and the main shaft spacer ring and between the right bearing gland and the main shaft spacer ring respectively, first gaps communicated with the corresponding exhaust channels are arranged between the left bearing gland and the left end face of the grinding wheel containing groove and between the right bearing gland and the movable fixing seat respectively, the right port of the center hole is connected with an air pipe joint, and an air pipe is externally connected to the air pipe joint.

2. The abrasive tip of claim 1, wherein said bearing set comprises two bearings side-by-side.

3. The grinding head of claim 1, wherein the pulley and the sleeve are integrally formed.

4. The grinding head of claim 3, wherein the pulley, the bushing and the right bearing gland are integrally formed.

5. The grinding head of claim 1 wherein said wheel diameter is greater than said pulley diameter.

6. The grinding head of claim 1, wherein belt grooves matched with the belt pulleys are formed at the front end and the rear end of the bracket fixing seat.

7. The abrasive tip of claim 1, wherein said air tube connector is a planar right angle connector.

8. The grinding head of claim 1, wherein the front lower end of the bracket fixing seat and the rear lower end of the bracket fixing seat are provided with grinding wheel blocking pieces matched with the grinding wheel.

9. The grinding head of claim 1, wherein both outer ends of the two spindle spacer rings are provided with a first L-shaped hook, both the inner ends of the left bearing gland and the right bearing gland are provided with a second L-shaped hook corresponding to the first L-shaped hook, the first L-shaped hook and the second L-shaped hook are arranged in a mutually inverted manner, and a second gap is formed between the first L-shaped hook and the second L-shaped hook.

10. The grinding head of claim 9, wherein the second vent hole extends up and down through the spindle spacer ring and the first L-shaped hook.

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