Detachable limiting and locking device for grinding block of ball grinder

Abstract

A detachable limiting and locking device for a grinding block of a ball grinder comprises a mounting seat, the grinding block is arranged on the mounting seat, and the lower end of the grinding block is in contact with the upper surface of a lower grinding wheel of the ball grinder; the other end of the mounting seat is mounted on the rotating shaft; the nut is in threaded connection with the rotating shaft and limits the upward movement of the mounting seat; a cavity is formed in the nut, a top plate is connected into the cavity through a tension spring, and a clamping head is arranged at the upper end of the top plate and extends out of a hole in the side wall of the nut. The nut, the top plate and the rotating shaft are vertically provided with prism holes, the cap is arranged at the top end of the nut, the center of the cap is inserted into the prism holes of the nut, the top plate and the rotating shaft through a hexagon head, and the outer side of the cap limits the extending clamping head. The detachable limiting and locking device for the grinding block of the ball grinding machine can be conveniently and rapidly detached when the detachable limiting and locking device needs to be detached and maintained.

Description

Technical Field

[0001] The utility model relates to a locking device, in particular to a detachable limiting locking device for a grinding block of a ball mill. Background Art

[0002] The patent "A grinding wheel repair device for a ball mill" with application number "201921573624.7" is a patent previously applied by our company. The technology mentions that the steel ball needs to be further polished after being formed in the cold heading machine. The existing ball mill mainly includes a lower grinding wheel that rotates actively and an upper grinding wheel that is pressed down by hydraulic equipment. Multiple circles of ball grooves with semicircular cross-sections are provided on the lower grinding wheel and the upper grinding wheel from the inside to the outside. During the grinding process of the steel ball, the lower grinding wheel itself also has certain wear and tear, and the ball groove is deep, which does not meet the grinding requirements. Therefore, it is necessary to repair the surface of the lower grinding wheel by means of a grinding block. The existing lower grinding wheel repair device is installed on the upper grinding wheel, and extends into the surface of the lower grinding wheel through the notch of the upper grinding wheel. During the rotation of the lower grinding wheel, the grinding is automatically completed so that the ball groove on the surface of the lower grinding wheel meets the grinding requirements. However, since the grinding block requires a certain amount of force to grind the lower grinding wheel, the lower grinding wheel repair device is prone to loosening after long-term work, resulting in insufficient downward pressure, which in turn affects the repair effect.

[0003] The device fixes the locking mechanism at the top of the nut, which can prevent the nut from loosening due to vibration and ensure that the mounting seat will not move up, so that the grinding block can always be pressed against the lower grinding wheel to avoid grinding failure. However, the locking mechanism in the device is welded or fixedly connected, which is very difficult to disassemble during the later maintenance process. It needs to be disassembled by knocking, which is easy to cause the parts to deform and fail. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a detachable limiting locking device for a grinding block of a ball mill, which can not only prevent loosening caused by vibration, but also facilitate and quickly disassemble when disassembly and maintenance are required.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A detachable limiting locking device for a grinding block of a ball mill comprises a mounting seat, a grinding block is arranged on the mounting seat, and the lower end of the grinding block contacts the upper surface of the lower grinding wheel of the ball mill; the other end of the mounting seat is mounted on a rotating shaft, and a nut is threadedly connected to the rotating shaft and limits the upward movement of the mounting seat;

[0007] A chamber is provided in the nut, and a top plate is connected to the chamber through a tension spring. A clamp is provided on the upper end of the top plate, and the clamp extends out of the hole on the side wall of the nut; a prismatic hole is vertically provided on the nut, the top plate and the rotating shaft, and a cap is placed on the top end of the nut. The center of the cap is inserted into the prismatic hole of the nut, the top plate and the rotating shaft through a hexagonal head, and the outer side of the cap limits the extended clamp.

[0008] The outer side of the cap is provided with card slots corresponding to the number of card heads.

[0009] One side of the clamp is spherical and the other side is cylindrical.

[0010] The upper end of the top plate is provided with a conical surface.

[0011] The cap is fixed to the nut by magnetic adsorption.

[0012] The utility model provides a detachable limiting locking device for a grinding block of a ball grinding machine, which has the following technical effects:

[0013] 1) By setting a top plate with a spring inside the nut, after the nut is connected to the rotating shaft, there is not only a threaded connection, but also two friction locks, and the spring elastic force is used to tighten, so as to achieve the initial anti-loosening of the nut; by setting a cap with a hexagonal head, the nut and the rotating shaft can be limited in the internal and external insertion; at the same time, the cap with the hexagonal head can also assist in disassembly in the later stage, which is simple and efficient.

[0014] 2) Due to the multi-layer locking and limiting of the present application, the nut can be prevented from loosening in the early stage, thereby preventing the mounting seat from moving upward and causing the grinding block to have insufficient grinding force; at the same time, the cap can be removed later for disassembly without hammering, thereby reducing deformation of parts and extending the service life of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a schematic diagram of the installation structure of the utility model.

[0017] Figure 2 It is a longitudinal sectional view of the nut in the utility model.

[0018] Figure 3 It is a longitudinal cross-sectional view of the nut in the utility model (without the cap).

[0019] Figure 4 It is a structural schematic diagram of the cap in the utility model.

[0020] Figure 5 This is a schematic diagram of the initial installation state of the utility model.

[0021] In the figure: platform 1, prismatic hole 2, rotating shaft 3, mounting seat 4, grinding block 5, nut 6, chamber 6.1, tension spring 6.2, top plate 6.3, clamping head 6.4, cap 6.5, hexagonal head 6.6, clamping groove 6.7, conical surface 6.8. DETAILED DESCRIPTION

[0022] like Figure 1As shown, a detachable limit locking device for a grinding block of a ball grinder is the same as the locking mechanism in the patent “A grinding wheel repair device for a ball grinder” with application number “201921573624.7”, and is also used to limit the upward movement of the mounting seat 4 to prevent the downward pressure of the grinding block 5 from decreasing due to loosening. The difference is that the locking device in the present application is detachable instead of welded or fixedly connected, ensuring that parts can be easily disassembled and replaced during later maintenance of the ball grinder.

[0023] The locking device in the present application includes a nut 6 arranged on the rotating shaft 3, and a threaded hole is arranged at the lower end of the nut 6, and the threaded hole is threadedly connected with the external thread on the rotating shaft 3. A chamber 6.1 is arranged in the nut 6, and a top plate 6.3 is connected to the chamber 6.1 through a tension spring 6.2. The top plate 6.3 is in the shape of a cap. In a non-stressed state, the lower end of the top plate 6.3 contacts the inner bottom surface of the chamber 6.1, and the upper end maintains a certain distance from the inner top surface of the chamber 6.1. Four groups of clamps 6.4 are arranged at the upper end of the top plate 6.3, and the four groups of clamps 6.4 extend out of the holes on the side wall of the nut 6 and can also be partially retracted. A prism hole 2 is vertically arranged on the upper end of the nut 6, the top plate 6.3 and the rotating shaft 3, and the cross section of the prism hole 2 is hexagonal. The cap 6.5 is placed on the top of the nut 6, and can be fixed to the nut 6 by magnetic adsorption through a magnet layer or an embedded magnet block, so that no matter how the motor vibrates, the cap 6.5 will not pop out. A hexagonal head 6.6 is provided at the center of the lower end of the cap 6.5. The hexagonal head 6.6 matches the prism hole 2. The hexagonal head 6.6 can be inserted into the nut 6, the top plate 6.3 and the prism hole 2 of the rotating shaft 3 to limit the relative rotation of the three. In addition, a card slot 6.7 corresponding to the number of the card slot 6.4 is provided on the outer side of the cap 6.5. After the hexagonal head 6.6 of the cap 6.5 is inserted into the prism hole 2, the card slot 6.4 can also further cooperate with the card slot 6.7 to prevent the nut 6 from loosening due to relative rotation.

[0024] The clamping head 6.4 is spherical on one side and cylindrical on the other side. The corresponding top plate 6.3 is provided with a conical surface 6.8 on the upper end, and when the top plate 6.3 moves upward, the clamping head 6.4 can be gradually pushed out through the conical surface 6.8.

[0025] Working principle and process:

[0026] 1) If Figure 3 As shown, after the nut 6 is screwed onto the shaft 3, the lower end of the nut 6 is threadedly connected to the shaft 3, the lower inner end surface of the top plate 6.3 inside the nut 6 is frictionally locked with the upper end of the shaft 3, and the upper end surface of the top plate 6.3 inside the nut 6 is frictionally locked with the inner top surface of the chamber 6.1, thereby performing preliminary anti-loosening protection.

[0027] 2) If Figure 2As shown, when the nut 6 is rotated into place, the top plate 6.3 also pushes out the clamp 6.4. At this time, the hexagonal head 6.6 is inserted into the nut 6, the top plate 6.3 and the prism hole 2 of the shaft 3 to prevent the relative movement of the nut 6 and the shaft 3 from the inside; and the clamping groove 6.7 on the outside of the cap 6.5 cooperates with the clamp 6.4 to further prevent the relative movement of the nut 6 and the shaft 3 from the outside. In this way, the nut 6 is prevented from rotating relative to the shaft 3 and moving upward. Since the cap 6.5 and the nut 6 are fixed by magnetic adsorption, they will not fall off due to the vibration of the motor.

[0028] 3) If Figure 5 As shown, when disassembly is required, the cap 6.5 is pulled upwards, and the hexagonal head 6.6 of the cap 6.5 is only inserted into the prismatic hole 2 of the nut 6. Then the cap 6.5 is rotated in the opposite direction, and the hexagonal head 6.6 of the cap 6.5 drives the nut 6 to rotate, gradually loosens and disengages from the rotating shaft 3. After the rotating shaft 3 moves out of the nut 6, the top plate 6.3 moves downward under the action of the tension spring 6.2, and the clamp 6.4 can be partially retracted into the nut 6. After the nut 6 is removed, the hexagonal head 6.6 of the cap 6.5 is inserted into the prismatic hole 2 of the nut 6 again, and the cap 6.5 and the nut 6 are fixed by magnetic adsorption, which can also prevent the loss of parts. After the nut 6 is disassembled, the mounting seat 4 and the grinding block 5 can be disassembled.

Claims

1. A detachable limiting locking device for a grinding block of a ball mill, characterized in that: The mounting seat (4) comprises a grinding block (5) provided on the mounting seat (4), the lower end of the grinding block (5) being in contact with the upper surface of the lower grinding wheel of the ball grinding machine; the other end of the mounting seat (4) is mounted on the rotating shaft (3), and the nut (6) is threadedly connected to the rotating shaft (3) and limits the upward movement of the mounting seat (4); The nut (6) is provided with a chamber (6.1), the chamber (6.1) is connected to a top plate (6.3) via a tension spring (6.2), a clamping head (6.4) is provided at the upper end of the top plate (6.3), and the clamping head (6.4) protrudes out of the hole on the side wall of the nut (6); the nut (6), the top plate (6.3) and the rotating shaft (3) are vertically provided with a prism hole (2), the cap (6.5) is placed on the top of the nut (6), the center of the cap (6.5) is inserted into the prism hole (2) of the nut (6), the top plate (6.3) and the rotating shaft (3) through a hexagonal head (6.6), and the outer side of the cap (6.5) limits the protruding clamping head (6.4).

2. The detachable limiting locking device for grinding blocks of a ball mill according to claim 1 is characterized in that: The outer side of the cap (6.5) is provided with card slots (6.7) corresponding in number to the card heads (6.4).

3. The detachable limiting locking device for grinding blocks of a ball mill according to claim 1 is characterized in that: One side of the clamp (6.4) is spherical, and the other side is cylindrical.

4. The detachable limiting locking device for grinding blocks of a ball mill according to claim 1 is characterized in that: The upper end of the top plate (6.3) is provided with a conical surface (6.8).

5. The detachable limiting locking device for grinding blocks of a ball mill according to claim 1, characterized in that: The cap (6.5) is fixed to the nut (6) by magnetic attraction.

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