A main shaft nut locking tool

Abstract

The utility model relates to numerical control machine tool main shaft technical field, concretely relates to a kind of main shaft nut locking tool, locking nut is screwed to the outside wall of main shaft, the outside wall of locking nut is equipped with at least two locking grooves, the locking tool includes annular rotating seat, at least one jack for fixed torque wrench is arranged in the side wall of annular rotating seat, the bottom outer edge of annular rotating seat is downwardly protruding with locking rod corresponding to the position of each locking groove, locking rod is integrally formed with annular rotating seat, the thickness of annular rotating seat is three to five times the thickness of locking rod, and the locking tool is made of flexible metal.The thickness of the annular rotating seat of the utility model is three to five times the thickness of the locking rod, ensuring that the rotating seat has sufficient rigidity, while the locking rod maintains a certain flexibility to meet the fine adjustment requirements;The locking tool is made of flexible metal, which causes minimal damage to the hard locking nut, and can also compensate for the small misalignment between the locking nut and the tool, protecting the threads;Simple structure, easy to use.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool spindle technology, specifically to a spindle nut locking fixture. Background Technology

[0002] To meet the requirements of machining accuracy, the lathe spindle needs to be pre-tightened by the spindle lock nut to ensure the accuracy of the lathe spindle during the assembly process. During spindle assembly, after the spindle lock nut is screwed into the specified position on the spindle, a certain torque is applied to the spindle lock nut to make the thread of the spindle lock nut tightly engage with the external thread of the mating spindle, thereby preventing the spindle lock nut from loosening.

[0003] Furthermore, because the spindle locking nut itself cannot be directly connected to a torque wrench, the torque wrench cannot directly apply torque to the spindle locking nut; pre-tightening can only be performed manually. Chinese utility model patent application number 201922435476.9 discloses a fixture for tightening spindle locking nuts. The fixture chuck has an inner hole that mates with the outer ring of the spindle locking nut. Several inner ring flat steel bars are evenly welded to the circumference of the inner hole wall. The width of the inner ring flat steel bars mates with grooves evenly distributed around the circumference of the outer ring of the spindle locking nut. An end face flat steel bar is welded to the end face of the fixture chuck above each inner ring flat steel bar, with a portion of the end face flat steel bar located above the inner hole. Two symmetrical fixture torque arms extend outward from the outer ring of the fixture chuck. However, this patent uses fixture torque arms for tightening and loosening, and the torque is controlled based on the assembly experience of personnel. There is no fixed quantitative standard, making it impossible to form a standardized operating procedure, which is detrimental to product quality control and hinders standardization. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a spindle nut locking fixture.

[0005] The purpose of this utility model is achieved through the following technical solution: a spindle nut locking fixture, wherein the locking nut is screwed onto the outer side wall of the spindle, and the outer side wall of the locking nut has at least two locking grooves. The locking fixture includes an annular rotating seat, and the side wall of the annular rotating seat has at least one insertion hole for fixing a torque wrench. A locking rod is provided protruding downward along the bottom outer edge of the annular rotating seat corresponding to the position of each locking groove. The locking rod is integrally formed with the annular rotating seat, and the thickness of the annular rotating seat is three to five times the thickness of the locking rod. The locking fixture is made of flexible metal.

[0006] Furthermore, the number of locking grooves is three to six, and the three to six locking grooves are arranged in a ring array on the outer side wall of the spindle nut.

[0007] Furthermore, the number of locking rods is three to six, and the three to six locking rods are arranged in a ring array protruding from the bottom outer edge of the ring rotating seat.

[0008] Furthermore, the cross-section of the locking rod is a square structure with one side being arc-shaped.

[0009] Furthermore, the number of the sockets is two to six, and the two to six sockets are arranged in a ring array on the side wall of the ring rotating seat.

[0010] Furthermore, the number of the insertion holes is the same as the number of the locking rods, and each insertion hole is located in the middle of two adjacent locking rods.

[0011] Furthermore, the socket is circular or a regular polygon.

[0012] Furthermore, both sides of the bottom of the locking rod are chamfered.

[0013] The beneficial effects of this utility model are as follows: The spindle nut locking fixture of this utility model has a hole for fixing a torque wrench on the side wall of the annular rotary seat, allowing for the adaptation of a standard torque wrench, thereby achieving precise torque control through the torque wrench and avoiding overtightening or loosening, which is especially suitable for high-precision scenarios such as spindles; the bottom of the annular rotary seat has a downward protruding locking rod, which is directly embedded in the locking groove of the locking nut, making the torque transmission more direct and reducing the risk of slippage; the locking rod and the annular rotary seat are integrally formed, avoiding assembly errors, improving overall strength, and facilitating processing; the thickness of the annular rotary seat is three to five times the thickness of the locking rod, ensuring that the rotary seat has sufficient rigidity, while the locking rod maintains a certain degree of flexibility to adapt to fine-tuning needs; the locking fixture is made of flexible metal, which minimizes damage to the hard locking nut and can also compensate for minor misalignment between the locking nut and the fixture, protecting the threads; the structure is simple and easy to use. Attached Figure Description

[0014] Figure 1 This is a perspective view of the locking nut described in this utility model.

[0015] Figure 2 This is a perspective view of the locking fixture described in this utility model.

[0016] Figure 3 This is a bottom view of the locking fixture described in Embodiment 1 of this utility model.

[0017] Figure 4 This is a bottom view of the locking fixture described in Embodiment 2 of this utility model.

[0018] The attached figures are labeled as follows: locking nut 10, locking groove 101, locking fixture 1, annular rotating seat 11, insertion hole 12, locking rod 13, chamfer 131. Detailed Implementation

[0019] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figures 1-4 The present invention will be further described below. The content mentioned in the embodiments is not intended to limit the present invention.

[0020] like Figures 1-3 The illustration shows an embodiment of the spindle nut locking fixture of the present invention. The locking nut 10 is screwed onto the outer side wall of the spindle. The outer side wall of the locking nut 10 has at least two locking grooves 101. The locking fixture 1 includes an annular rotating seat 11. The side wall of the annular rotating seat 11 has at least one insertion hole 12 for fixing a torque wrench. The bottom outer edge of the annular rotating seat 11 has a locking rod 13 protruding downwards corresponding to the position of each locking groove 101. The locking rod 13 is integrally formed with the annular rotating seat 11. The thickness of the annular rotating seat 11 is three to five times the thickness of the locking rod 13. The locking fixture 1 is made of flexible metal.

[0021] This utility model's spindle nut locking fixture has an insertion hole 12 for fixing a torque wrench on the side wall of the annular rotary seat 11, allowing for the adaptation of a standard torque wrench. This enables precise torque control via the torque wrench, preventing overtightening or overloosening, making it particularly suitable for high-precision applications such as spindles. A locking rod 13 protrudes downward from the bottom of the annular rotary seat 11, directly embedding into the locking groove 101 of the locking nut 10, resulting in more direct torque transmission and reducing the risk of slippage. The locking rod 13 and the annular rotary seat 11 are integrally formed, avoiding assembly errors, improving overall strength, and facilitating processing. The thickness of the annular rotary seat 11 is three to five times the thickness of the locking rod 13, ensuring sufficient rigidity of the rotary seat, while the locking rod 13 maintains a certain degree of flexibility to accommodate fine-tuning needs. The locking fixture 1 is made of flexible metal, minimizing damage to the hard locking nut 10 and compensating for minor misalignment between the locking nut 10 and the fixture, protecting the threads. The structure is simple and easy to use.

[0022] In this embodiment, the number of locking grooves 101 is three to six, and the three to six locking grooves 101 are arranged in a circular array on the outer side wall of the main shaft nut. Correspondingly, the number of locking rods 13 is three to six, and the three to six locking rods 13 are arranged in a circular array protruding from the bottom outer edge of the annular rotating seat 11. In this embodiment, the number of locking grooves 101 and locking rods 13 is four each, which facilitates quick alignment of the locking rods 13 with the locking grooves 101.

[0023] In this embodiment, the locking rod 13 has a square structure with one side curved. This structure, in conjunction with the locking groove 101, allows for more direct torque transmission and reduces the risk of slippage.

[0024] In this embodiment, the number of insertion holes 12 is two to six, and the two to six insertion holes 12 are arranged in a ring array on the side wall of the annular rotating seat 11. In this embodiment, the number of insertion holes 12 is four, and at least two symmetrically distributed locking grooves 101 are designed to ensure uniform force distribution and prevent stress concentration on one side from causing the nut to deviate.

[0025] In this embodiment, the number of insertion holes 12 is the same as the number of locking rods 13, and each insertion hole 12 is located in the middle of two adjacent locking rods 13. The alternating arrangement of insertion holes 12 and locking rods 13 achieves balance in torque transmission and ease of operation.

[0026] In this embodiment, the socket 12 is circular or a regular polygon. The shape of the socket 12 can be reasonably set according to the cross-sectional shape of the torque wrench connection end.

[0027] In this embodiment, the locking fixture 1 is made of copper. Using copper as a flexible metal minimizes damage to the rigid locking nut 10 and can also compensate for minor misalignments between the locking nut 10 and the fixture, protecting the threads.

[0028] like Figure 4 The image shows a second embodiment of the spindle nut locking fixture of this utility model. The difference from the first embodiment is that both sides of the bottom of the locking rod 13 are chamfered 131. This structure facilitates the insertion of the locking rod 13 into the locking groove 101 of the locking nut 10.

[0029] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A spindle nut locking fixture, wherein the locking nut is screwed onto the outer side wall of the spindle, and the outer side wall of the locking nut has at least two locking grooves, characterized in that: The locking fixture includes an annular rotating seat. The side wall of the annular rotating seat has at least one insertion hole for fixing a torque wrench. The bottom outer edge of the annular rotating seat has a locking rod protruding downwards corresponding to the position of each locking groove. The locking rod is integrally formed with the annular rotating seat. The thickness of the annular rotating seat is three to five times the thickness of the locking rod. The locking fixture is made of flexible metal.

2. The spindle nut locking fixture according to claim 1, characterized in that: The number of locking grooves is three to six, and the three to six locking grooves are arranged in a ring array on the outer side wall of the spindle nut.

3. The spindle nut locking fixture according to claim 1, characterized in that: The number of locking rods is three to six, and the three to six locking rods are arranged in a ring array protruding from the bottom outer edge of the ring rotating seat.

4. The spindle nut locking fixture according to claim 1, characterized in that: The locking rod has a square structure with one side curved.

5. A spindle nut locking fixture according to claim 1, characterized in that: The number of sockets is two to six, and the two to six sockets are arranged in a ring array on the side wall of the ring rotating seat.

6. A spindle nut locking fixture according to claim 5, characterized in that: The number of the insertion holes is the same as the number of the locking rods, and each insertion hole is located in the middle of two adjacent locking rods.

7. A spindle nut locking fixture according to claim 1, characterized in that: The socket is circular or a regular polygon.

8. A spindle nut locking fixture according to claim 1, characterized in that: Both sides of the bottom of the locking rod are chamfered.

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