Device for grinding center hole of ball screw through grinding machine

Abstract

The utility model belongs to the technical field of transmission, and discloses a device for grinding a center hole of a ball screw by a grinding machine, which is mounted in a universal grinding machine and comprises a screw rod, a sliding sleeve and a center drill, the screw rod comprises a first abutting part, a locking part and a first screwing part, and the first screwing part is movably arranged in a mounting hole of the universal grinding machine in a penetrating manner; the first abutting table abuts against the periphery of the mounting hole in the circumferential direction, the sliding sleeve comprises a second screwing part and a connecting part, the second screwing part movably penetrates through the mounting hole, the first screwing part is in threaded connection with the inner wall of the second screwing part, the center drill is clamped to the connecting part, and the lead screw rotates to drive the sliding sleeve in threaded connection with the lead screw to move in the axial direction of the lead screw. The center drill locked to the sliding sleeve is further driven to move so as to complete grinding of a center hole of the rolling lead screw, after the grinding procedure is completed, the lead screw is rotated so that the second threaded connection portion of the sliding sleeve can be disengaged from the first threaded connection portion of the lead screw, and then the sliding sleeve and the center drill locked to the sliding sleeve can be taken down and replaced with a tip to conduct the subsequent grinding procedure.

Description

Technical Field

[0001] The utility model relates to the field of transmission technology, in particular to a device for grinding a central hole of a ball screw on a grinding machine. Background Art

[0002] With the rapid development of intelligent mechanical devices, ball screws are gradually used in high-precision industrial products due to their high transmission efficiency and precise positioning, and have become one of the most widely used parts in the industry. Ball screws are divided into ground and rolled grades. Ground ball screws are used in CNC precision machine tools, and their processing accuracy requirements are very strict. The processing technology of ground ball screws includes blanking, annealing, turning, grinding, etc.

[0003] The center holes at both ends of the ground ball screw are machined on a lathe. When the accuracy of the machined center hole cannot meet the grinding requirements, it needs to be trimmed. The existing method of trimming the center hole is to use a special vertical center hole grinder. The grinding-grade ball screw is placed vertically in the device, and the device is started after clamping. The workpiece rotates, and the grinding head of the upper grinding mechanism approaches and contacts the center hole, and the center hole is ground and trimmed until the accuracy of the center hole meets the grinding requirements. The grinding-grade ball screw is then transferred to a universal grinder for grinding.

[0004] Since the dedicated vertical center hole grinder equipment is vertical, the ball screw to be ground needs to be moved onto a dedicated platform during operation, and then the personnel climb onto the dedicated platform to operate the equipment. After the grinding is completed, the workpiece is moved off the dedicated platform. The labor intensity is high and there are certain safety operation risks. Utility Model Content

[0005] The utility model aims to provide a device for grinding the center hole of a ball screw on a grinding machine, which can integrate the grinding function and the center hole grinding function and reduce the labor intensity.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A device for grinding a center hole of a ball screw on a grinding machine, installed on a universal grinding machine, comprising:

[0008] A screw rod, the screw rod comprising a first abutting portion, a locking portion and a first screw-connecting portion, the first abutting portion being located between the locking portion and the first screw-connecting portion, and the first abutting portion being provided with a first abutting platform, the first abutting platform extending outwardly in a circumferential direction away from the first abutting portion, the first screw-connecting portion being movably inserted into a mounting hole of the universal grinder, and the first abutting platform abutting against the periphery of the mounting hole in a circumferential direction;

[0009] A sliding sleeve, the sliding sleeve comprising a second threaded portion and a connecting portion, the second threaded portion being movably arranged in the mounting hole of the universal grinder, and the first threaded portion being threadedly connected to an inner wall of the second threaded portion;

[0010] A center drill, the center drill being clamped on the connecting portion

[0011] Preferably, the device for grinding the center hole of a ball screw with a grinder also includes a tapered sleeve, which is clamped in the mounting hole, the second threaded portion is inserted in the tapered sleeve, and the outer wall of the second threaded portion is provided with a guide groove, the guide groove is arranged along the axial direction of the sliding sleeve, and the inner wall of the tapered sleeve is provided with a clamping groove. The device for grinding the center hole of a ball screw with a grinder also includes a guide key, the top of the guide key is embedded in the clamping groove, and the bottom of the guide key can slide along the guide groove.

[0012] Preferably, the sliding sleeve also includes a second abutment portion, which is located between the second threaded portion and the connecting portion, and the second abutment portion is provided with a second abutment platform, which extends circumferentially outward away from the second abutment portion, and one end of the tapered sleeve close to the center drill extends out of the mounting hole and circumferentially abuts against the second abutment platform.

[0013] Preferably, the wall thickness of the tapered sleeve gradually decreases from an end close to the center drill to an end away from the center drill.

[0014] Preferably, the device for grinding the center hole of a ball screw with a grinder further comprises a handwheel, the handwheel is provided with a connecting hole, and the locking portion is clamped in the connecting hole.

[0015] Preferably, the outer wall of the locking portion cooperates with the hole wall of the connecting hole to form a slot, a key is embedded in the slot, and the outer wall of the key circumferentially abuts against the slot wall of the slot.

[0016] Preferably, the key is X-shaped.

[0017] Preferably, the device for grinding the center hole of a ball screw with a grinder also includes a fixing nut and a connecting nut, the locking portion and the first abutting portion are both inserted into the screw hole of the fixing nut, and one end of the fixing nut circumferentially abuts against the handwheel, and the other end circumferentially abuts against the universal grinder, the screw hole portion of the connecting nut is sleeved on the universal grinder, and the other portion is threadedly connected to the external thread of the fixing nut.

[0018] Preferably, the device for grinding the center hole of a ball screw with a grinder also includes a chuck and a chuck nut, the outer wall of the connecting part is provided with an external thread, the chuck is clamped in the connecting part and one end thereof extends out of the connecting part, the center drill is clamped in the chuck, one end of the chuck nut is screwed to the external thread of the outer wall of the connecting part, and the other end is clamped in the chuck.

[0019] Preferably, a screw hole is provided at the end of the locking portion facing away from the first threaded portion, and the device for grinding the center hole of a ball screw using a grinder also includes a gasket and a locking bolt, the gasket covers the connecting hole, and the locking bolt passes through the gasket and is threadedly connected to the screw hole.

[0020] The beneficial effects of the utility model are as follows: the utility model provides a device for grinding the center hole of a ball screw on a grinder, which is installed in a universal grinder. The device for grinding the center hole of a ball screw on a grinder comprises a screw, a sliding sleeve and a center drill. The screw comprises a first abutting portion, a locking portion and a first threaded portion. The first threaded portion is movably inserted into the mounting hole of the universal grinder. The first abutting platform circumferentially abuts against the periphery of the mounting hole. The sliding sleeve comprises a second threaded portion and a connecting portion. The second threaded portion is movably inserted into the mounting hole of the universal grinder. The first threaded portion is threadedly connected to the second threaded portion. The inner wall of the part, the center drill is clamped in the connecting part, and the rotation of the screw rod can drive the sliding sleeve screwed thereto to move along its axial direction, thereby driving the center drill locked on the sliding sleeve to move, so as to complete the grinding of the center hole of the rolling screw. After completing the grinding process, the second threaded part of the sliding sleeve is separated from the first threaded part of the screw rod by rotating the screw rod, and then the sliding sleeve and the center drill locked thereto can be removed and replaced with a top point for subsequent grinding processes. The utility model combines the grinding function and the center hole grinding function in one device, thereby reducing labor intensity and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an exploded schematic diagram of a device for grinding the center hole of a ball screw on a grinder provided by an embodiment of the utility model;

[0022] Figure 2 It is a schematic assembly diagram of a device for grinding the center hole of a ball screw on a grinder provided by an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the assembly of a device for grinding the center hole of a ball screw on a grinder and a universal grinder provided by an embodiment of the utility model;

[0024] Figure 4 It is an assembly cross-sectional view of a device for grinding the center hole of a ball screw on a grinder and a universal grinder provided by an embodiment of the utility model.

[0025] In the figure:

[0026] 100. Universal grinding machine;

[0027] 1. Screw rod; 11. Locking part; 12. First abutting part; 13. First threaded part; 2. Sliding sleeve; 21. Second threaded part; 22. Connecting part; 23. Second abutting part; 3. Center drill; 4. Handwheel; 5. Key; 6. Washer; 7. Locking bolt; 8. Fixing nut; 9. Connecting nut; a. Taper sleeve; b. Guide key; c. Collet; d. Collet nut. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] This embodiment provides a device for grinding the center hole of a ball screw on a grinder, which combines the grinding function and the center hole grinding function in one device, thereby reducing labor intensity and improving processing efficiency.

[0033] See also Figure 1-Figure 4 , a device for grinding the center hole of a ball screw provided in this embodiment is installed in a universal grinder 100. Specifically, a device for grinding the center hole of a ball screw provided in this embodiment includes a screw 1, a sliding sleeve 2 and a center drill 3. In this embodiment, the rotation of the screw 1 can drive the sliding sleeve 2 screwed thereto to move along its axial direction, thereby driving the center drill 3 locked in the sliding sleeve 2 to move, so as to complete the grinding of the center hole of the ball screw. After completing the grinding process, this embodiment can rotate the screw 1 to disengage the sliding sleeve 2, thereby removing the sliding sleeve 2 and the center drill 3 locked thereto, replacing them with a center, and performing subsequent grinding processes.

[0034] Specifically, the screw rod 1 includes a locking portion 11, a first abutting portion 12 and a first threaded portion 13, see Figure 1 The first abutment portion 12 is located between the locking portion 11 and the first threaded portion 13. The first threaded portion 13 is movably inserted into the mounting hole of the universal grinder 100. Furthermore, the first abutment portion 12 is provided with a first abutment platform. The first abutment platform extends circumferentially outward away from the first abutment portion 12. The first abutment platform circumferentially abuts against the periphery of the mounting hole to prevent the screw rod 1 from falling off.

[0035] Preferably, in this embodiment, a device for grinding the center hole of a ball screw on a grinder further comprises a hand wheel 4, the hand wheel 4 is provided with a connecting hole, the locking portion 11 is clamped in the connecting hole, and the screw rod 1 is driven to rotate by rotating the hand wheel 4. Further preferably, the axis of the locking portion 11 coincides with the axis of the connecting hole.

[0036] Optionally, in this embodiment, a plurality of through holes are provided on the hand wheel 4, and the plurality of through holes are arranged circumferentially along the connecting hole so that fingers can be inserted into the through holes for operation.

[0037] Further, the outer wall of the locking portion 11 is provided with a first groove, the inner wall of the connecting hole is provided with a second groove, the first groove and the second groove cooperate to form a slot, a key 5 is embedded in the slot, and the outer wall of the key 5 circumferentially abuts against the slot wall of the slot, so that the locking portion 11 is clamped in the connecting hole to prevent relative displacement between the screw rod 1 and the hand wheel 4. Preferably, the key 5 is X-shaped, and the slot is also X-shaped to prevent displacement between the screw rod 1 and the hand wheel 4 in all directions.

[0038] For example, a screw hole is provided at the end of the locking portion 11 away from the first threaded portion 13. A device for grinding the center hole of a ball screw on a grinder also includes a gasket 6 and a locking bolt 7, wherein the gasket 6 covers the connecting hole, and the locking bolt 7 passes through the gasket 6 and is threadedly connected to the screw hole to lock the screw rod 1 and the handwheel 4, thereby further preventing relative movement between the screw rod 1 and the handwheel 4.

[0039] Preferably, a device for grinding the center hole of a ball screw on a grinder also includes a fixing nut 8 and a connecting nut 9, wherein the cross-section of the screw hole of the fixing nut 8 is convex, the locking portion 11 and the first abutting portion 12 are both inserted into the screw hole of the fixing nut 8, and one end of the fixing nut 8 circumferentially abuts against the end face of the handwheel 4, and the other end circumferentially abuts against the end of the universal grinder 100, and the screw hole of the connecting nut 9 is divided into a front part and a rear part, the front part is sleeved on the universal grinder 100, and the rear part is screwed to the external thread of the fixing nut 8, thereby further locking the screw 1 and limiting its axial movement.

[0040] See also Figure 1 and Figure 4 The sliding sleeve 2 includes a second threaded portion 21 and a connecting portion 22 , the second threaded portion 21 is movably inserted into the mounting hole of the universal grinder 100 , and the first threaded portion 13 is threadedly connected to the inner wall of the second threaded portion 21 , and the center drill 3 is clamped in the connecting portion 22 .

[0041] This embodiment also includes a cone sleeve a, see Figure 4 , the cone sleeve a is clamped in the mounting hole, the second threaded portion 21 is inserted in the cone sleeve a, preferably, the outer wall of the second threaded portion 21 is provided with a guide groove, the guide groove is arranged along the axial direction of the sliding sleeve 2, and the inner wall of the cone sleeve a is provided with a clamping groove, a device for grinding the center hole of a ball screw by a grinder also includes a guide key b, the top of the guide key b is embedded in the clamping groove, and the bottom of the guide key b can slide along the guide groove. Since the cone sleeve a is clamped in the mounting hole, the top of the guide key b is embedded in the clamping groove, when the screw 1 rotates to drive the sliding sleeve 2 to move along its axial direction, the bottom of the guide key b is always embedded in the guide groove, limiting the rotation of the sliding sleeve 2, so as to guide the linear motion of the sliding sleeve 2.

[0042] Optionally, a slot is provided at one end of the tapered sleeve a close to the center drill 3 to increase the linear distance of the sliding sleeve 2 extending out of the mounting hole, thereby increasing the processing range of the present embodiment.

[0043] In this embodiment, by providing the tapered sleeve a, there is no need to provide a slot in the mounting hole of the universal grinder 100, thereby improving the practicality and versatility of the device for grinding the center hole of a ball screw on a grinder.

[0044] Preferably, the guide key b is X-shaped to prevent displacement between the sliding sleeve 2 and the cone sleeve a in all directions.

[0045] Preferably, the sliding sleeve 2 also includes a second abutting portion 23, which is located between the second threaded portion 21 and the connecting portion 22. The second abutting portion 23 is provided with a second abutting platform, which extends circumferentially outward away from the second abutting portion 23. One end of the tapered sleeve a close to the center drill 3 extends out of the mounting hole for easy removal and placement. Further preferably, one end of the tapered sleeve a close to the center drill 3 circumferentially abuts against the second abutting platform to limit the movement distance of the sliding sleeve 2.

[0046] Optionally, the wall thickness of the tapered sleeve a gradually decreases from the end close to the center drill 3 to the end away from the center drill 3, that is, the tapered sleeve a is tapered, and adapted, one end of the mounting hole is also tapered to facilitate the subsequent installation of the center in the grinding process.

[0047] Preferably, the device for grinding the center hole of the ball screw by a grinder also includes a chuck c and a chuck nut d. The outer wall of the connecting portion 22 is provided with an external thread. The chuck c is clamped in the connecting portion 22. The center drill 3 is clamped in the chuck c. One end of the chuck nut d is screwed to the external thread of the outer wall of the connecting portion 22. Further preferably, one end of the chuck c extends out of the connecting portion 22, and the other end of the chuck nut d is clamped in the chuck c. Please refer to Figure 1 One end of the chuck c is trapezoidal, and the other end of the chuck nut d is inverted trapezoidal to match one end of the chuck c to prevent the center drill 3 from falling during the grinding process.

[0048] In summary, in this embodiment, the rotation of the screw rod 1 can drive the sliding sleeve 2 threaded thereto to move along its axial direction, and then drive the center drill 3 locked in the sliding sleeve 2 to move, so as to complete the grinding of the center hole of the rolling screw. After completing the grinding process, the screw rod 1 is driven to rotate by rotating the hand wheel 4, so that the second threaded portion 21 of the sliding sleeve 2 is disengaged from the first threaded portion 13 of the screw rod 1, and then the sliding sleeve 2 and the center drill 3 locked thereto can be removed, and the center point can be installed in the connecting portion 22 to carry out the subsequent grinding process. The device for grinding the center hole of a ball screw by a grinder provided in this embodiment combines the grinding function and the center hole grinding function in one device, thereby reducing labor intensity and improving processing efficiency.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A device for grinding the center hole of a ball screw on a grinding machine, installed on a universal grinding machine (100), characterized in that: include: A screw rod (1), the screw rod (1) comprising a first abutting portion (12), a locking portion (11) and a first screw-connecting portion (13), the first abutting portion (12) being located between the locking portion (11) and the first screw-connecting portion (13), and the first abutting portion (12) being provided with a first abutting platform, the first abutting platform extending outwardly in a circumferential direction away from the first abutting portion (12), the first screw-connecting portion (13) being movably inserted into a mounting hole of the universal grinder (100), and the first abutting platform abutting against the periphery of the mounting hole in a circumferential direction; A sliding sleeve (2), the sliding sleeve (2) comprising a second threaded portion (21) and a connecting portion (22), the second threaded portion (21) being movably inserted into a mounting hole of the universal grinder (100), and the first threaded portion (13) being threadedly connected to an inner wall of the second threaded portion (21); A center drill (3), wherein the center drill (3) is clamped on the connecting portion (22).

2. The device for grinding the center hole of a ball screw on a grinding machine according to claim 1, characterized in that: The device for grinding the center hole of a ball screw with a grinder also includes a tapered sleeve (a), the tapered sleeve (a) is clamped in the mounting hole, the second threaded portion (21) is inserted into the tapered sleeve (a), and the outer wall of the second threaded portion (21) is provided with a guide groove, the guide groove is arranged along the axial direction of the sliding sleeve (2), and the inner wall of the tapered sleeve (a) is provided with a clamping groove. The device for grinding the center hole of a ball screw with a grinder also includes a guide key (b), the top of the guide key (b) is embedded in the clamping groove, and the bottom of the guide key (b) can slide along the guide groove.

3. The device for grinding the center hole of a ball screw on a grinding machine according to claim 2, characterized in that: The sliding sleeve (2) further comprises a second abutting portion (23), the second abutting portion (23) being located between the second threaded portion (21) and the connecting portion (22), and the second abutting portion (23) being provided with a second abutting platform, the second abutting platform extending circumferentially outward away from the second abutting portion (23), and one end of the tapered sleeve (a) close to the center drill (3) extending out of the mounting hole and circumferentially abutting against the second abutting platform.

4. The device for grinding the center hole of a ball screw on a grinding machine according to claim 2, characterized in that: The wall thickness of the cone sleeve (a) gradually decreases from an end close to the center drill (3) to an end away from the center drill (3).

5. The device for grinding the center hole of a ball screw on a grinding machine according to claim 1, characterized in that: The device for grinding the center hole of a ball screw on a grinding machine also includes a hand wheel (4), the hand wheel (4) is provided with a connecting hole, and the locking portion (11) is clamped in the connecting hole.

6. The device for grinding the center hole of a ball screw on a grinding machine according to claim 5, characterized in that: The outer wall of the locking portion (11) cooperates with the hole wall of the connecting hole to form a slot, a key (5) is embedded in the slot, and the outer wall of the key (5) circumferentially abuts against the slot wall of the slot.

7. The device for grinding the center hole of a ball screw on a grinding machine according to claim 6, characterized in that: The key (5) is in an X shape.

8. The device for grinding the center hole of a ball screw on a grinding machine according to claim 5, characterized in that: The device for grinding the center hole of a ball screw on a grinding machine also includes a fixing nut (8) and a connecting nut (9), the locking portion (11) and the first abutting portion (12) are both inserted into the screw hole of the fixing nut (8), and one end of the fixing nut (8) is circumferentially abutted against the hand wheel (4), and the other end is circumferentially abutted against the universal grinder (100), and the screw hole portion of the connecting nut (9) is sleeved on the universal grinder (100), and the other portion is screwed to the external thread of the fixing nut (8).

9. The device for grinding the center hole of a ball screw on a grinding machine according to claim 1, characterized in that: The device for grinding the center hole of a ball screw with a grinder also includes a chuck (c) and a chuck nut (d), the outer wall of the connecting part (22) is provided with an external thread, the chuck (c) is clamped on the connecting part (22) and one end thereof extends out of the connecting part (22), the center drill (3) is clamped on the chuck (c), one end of the chuck nut (d) is screwed to the external thread of the outer wall of the connecting part (22), and the other end is clamped on the chuck (c).

10. The device for grinding the center hole of a ball screw by a grinder according to claim 5, characterized in that: The locking portion (11) is provided with a screw hole at the end away from the first threaded portion (13). The device for grinding the center hole of a ball screw on a grinder also includes a gasket (6) and a locking bolt (7). The gasket (6) covers the connecting hole, and the locking bolt (7) passes through the gasket (6) and is screwed to the screw hole.

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