Locking device for axial pull rod locking nut of PSM rolling mill

Abstract

The utility model discloses an anti-loosening device for an axial pull rod locking nut of a PSM rolling mill. The anti-loosening device comprises a machine body, a pull rod, a locking nut, a supporting nut, an anti-loosening assembly and an auxiliary assembly. A pull rod is mounted on the machine body and is in threaded connection with a locking nut; the supporting nut is in threaded connection with the pull rod, round holes are annularly formed in the end face of the supporting nut at equal intervals, and the anti-loosening assembly and the auxiliary assembly are arranged on the supporting nut. The worm is controlled to rotate to drive the rotating ring to rotate so as to enable the gear to rotate, the stud is controlled to descend to be clamped with the locking nut, the limiting and anti-disengaging effects on the locking nut are achieved, the locking nut is prevented from loosening due to pressure relief in the working process of the rolling mill, and normal production of products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of PSM rolling mill devices, in particular to an anti-loosening device for an axial pull rod locking nut of a PSM rolling mill. Background Art

[0002] The existing Chinese patent document with announcement number CN204182689U discloses a transmission mechanism for a small bar wire PSM finishing mill group, comprising: a roller drive shaft, a positioning bearing sleeve, a locking end cap, and a tie rod, characterized in that it also includes: a support ring fixed in a neutral position at the end of the roller drive shaft and having a keyway, the inner side of the aforementioned locking end cap having two centrally symmetrical keyways and a tangential key fixedly disposed in each keyway, the exposed portions of the two tangential keys being inserted into the keyway on the support ring. The benefits of this utility model are that: it is modified based on the structure of the existing transmission mechanism, is easy to manufacture, and reduces resource waste; the locking end cap and the mill drive shaft are positioned by the tangential keys, which effectively overcome the rolling force, so that there is no relative movement between the locking end cap and the mill drive shaft, and the tensile stress of the tie rod is very close to the prestress during mill assembly, and the maximum will not exceed 50 kilograms, thereby effectively avoiding tie rod breakage.

[0003] However, in the aforementioned solution and existing technologies, the PSM mill places extremely stringent requirements on the axial precision of the roll rings. The axial locking of the roll rings relies on tie rods. The lower end of the tie rod is screwed into a chuck, while the upper end is pressurized and pulled by a hydraulic puller, while a lock nut is used to secure it. During online operation, the frequent impact and vibration of the workpiece on the mill can cause the lock nut to loosen due to pressure relief. This can cause the roll rings to lose their axial locking force and move, resulting in unstable product dimensions and failure to meet customer requirements.

[0004] To this end, the utility model proposes an anti-loosening device for the axial tie rod locking nut of the PSM rolling mill to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-loosening device for the axial tie rod locking nut of a PSM rolling mill, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-loosening device for the axial tie rod locking nut of a PSM rolling mill includes a machine body, a tie rod, a locking nut, a support nut, an anti-loosening component and an auxiliary component; a tie rod is installed on the machine body, and the tie rod is threadedly connected with a locking nut; the support nut is threadedly connected to the tie rod, and circular holes are equidistantly opened on the end face of the support nut, and an anti-loosening component and an auxiliary component are provided on the support nut.

[0007] Preferably, the anti-loosening assembly includes a gear, a threaded hole, a swivel, an inner gear ring, an outer gear ring, an L-shaped plate, a worm, a knob, a stud and a connecting rod; the gear is equidistantly rotatably arranged at the circular hole position on the support nut, and a threaded hole is opened in the center of the gear; the swivel is rotatably arranged on the support nut, the inner gear ring is arranged on the inner wall of the swivel, and the outer gear ring is arranged on the outer wall of the swivel; the L-shaped plate is symmetrically fixed on the side wall of the support nut, the two ends of the worm are rotatably connected to the L-shaped plate, and the worm shaft passes through the L-shaped plate and is fixedly connected to the knob; the two ends of the connecting rod are fixedly connected to the stud.

[0008] Preferably, the auxiliary component includes a card slot, a fixed box, a limit plate, a spring, a protrusion and a rotating plate; the card slot is opened on the machine body, and the fixed box is fixedly set on the machine body; the limit plate is movably connected in the fixed box, and a spring is set at the side end of the limit plate; the protrusion is fixed at the side end of the limit plate, the end of the protrusion passes through the fixed box and covers the card slot, and the rotating plate is rotatably set on the side wall of the support nut.

[0009] Preferably, the gear and the inner gear ring are arranged at corresponding positions, and the two are meshed; the outer gear ring and the worm are arranged at corresponding positions, and the number of sets is the same, and the two are meshed.

[0010] Preferably, the threaded holes, studs and circular holes are arranged at corresponding positions and in the same number of groups, the threaded holes are engaged with the studs, the studs are sleeved with the circular holes, and the ends of the studs are clamped with the locking nuts.

[0011] Preferably, the card slots correspond to the setting positions of the rotating plates and are provided in the same number of groups, and the ends of the rotating plates are clamped in the card slots.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By controlling the rotation of the worm to drive the rotating ring to rotate and then the gear to rotate, the stud is controlled to descend and engage with the locking nut to limit and prevent it from falling off, avoiding the locking nut from being loosened due to pressure relief during the operation of the rolling mill, and ensuring the normal production of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the connection of the support nut structure of the utility model;

[0016] Figure 3 This is a half-section view of the support nut structure connection of the utility model;

[0017] Figure 4 This is a schematic diagram of the stud structure connection of the utility model;

[0018] Figure 5 This is a schematic diagram of the connection of the fixed box structure of the utility model;

[0019] Figure 6 This is a half-section view of the fixed box structure connection of the utility model.

[0020] In the figure: body 1, pull rod 2, locking nut 3, support nut 4, circular hole 5, gear 6, threaded hole 7, swivel 8, inner ring gear 9, outer ring gear 10, L-shaped plate 11, worm 12, knob 13, stud 14, connecting rod 15, slot 16, fixing box 17, limit plate 18, spring 19, bump 20, swivel plate 21. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1-6 The present invention provides the following three preferred embodiments:

[0023] Example 1

[0024] A device for preventing loosening of the axial tie rod locking nut of a PSM rolling mill comprises a machine body 1, a tie rod 2, a locking nut 3, a support nut 4, an anti-loosening assembly and an auxiliary assembly; a tie rod 2 is installed on the machine body 1, and the tie rod 2 is threadedly connected with the locking nut 3; the support nut 4 is threadedly connected to the tie rod 2, and circular holes 5 are equidistantly opened in an annular manner on the end face of the support nut 4, and an anti-loosening assembly and an auxiliary assembly are provided on the support nut 4; the anti-loosening assembly comprises a gear 6, a threaded hole 7, a swivel 8, an inner gear ring 9, an outer gear ring 10, an L-shaped plate 11, a worm 12, a knob 13, a stud 14 and a connecting rod 15; the auxiliary assembly comprises a slot 16, a fixing box 17, a limit plate 18, a spring 19, a protrusion 20 and a rotating plate 21.

[0025] During use, after the PSM rolling mill roller ring is installed, a special puller is used to pressurize the pull rod 2 and tighten the locking nut 3. The puller is removed to thread the support nut 4 to the pull rod 2, and the worm 12 is controlled to rotate to drive the swivel 8 to rotate and then the gear 6 to rotate, so as to control the stud 14 to descend and engage with the locking nut 3 to limit it and prevent it from falling off, thereby avoiding the locking nut from being loosened due to pressure relief during the operation of the rolling mill and ensuring the normal production of the product.

[0026] Example 2, based on Example 1:

[0027] The gear 6 in the anti-loosening assembly is equidistantly rotated and set at the position of the circular hole 5 on the support nut 4, and a threaded hole 7 is opened in the center of the gear 6; the swivel 8 is rotatably set on the support nut 4, the inner ring gear 9 is set on the inner wall of the swivel 8, and the outer ring gear 10 is set on the outer wall of the swivel 8; the L-shaped plate 11 is symmetrically fixed on the side wall of the support nut 4, and the two ends of the worm 12 are rotatably connected to the L-shaped plate 11, and the worm 12 shaft passes through the L-shaped plate 11 and is fixedly connected with a knob 13; the two ends of the connecting rod 15 are fixedly connected to the stud 14; the gear 6 and the inner ring gear 9 are set in corresponding positions, and the two are meshed; the outer ring gear 10 and the worm 12 are set in corresponding positions and the number of groups is the same, and the two are meshed; the threaded hole 7, the stud 14 and the circular hole 5 are set in corresponding positions and the number of groups is the same, the threaded hole 7 is meshed with the stud 14, the stud 14 and the circular hole 5 are socketed, and the end of the stud 14 is clamped with the locking nut 3.

[0028] During use, after the support nut 4 is installed, the knob 13 is rotated to drive the worm 12 to rotate. The worm 12 engages the outer gear ring 10 to drive the swivel 8 to rotate, and then engages to rotate the gear 6. During the process, the stud 14 and the threaded hole 7 are threadedly connected, so that the end of the stud 14 moves downward until it is tightly engaged with the locking nut 3. During the use of the PSM rolling mill, the stud 14 always applies a downward locking force to the locking nut 3, effectively preventing the locking nut 3 from vibrating and rotating loose.

[0029] Example 3, based on Example 2:

[0030] The card slot 16 in the auxiliary component is opened on the body 1, and the fixed box 17 is fixedly set on the body 1; the limit plate 18 is movably clamped in the fixed box 17, and a spring 19 is provided at the side end of the limit plate 18; the protrusion 20 is fixedly set at the side end of the limit plate 18, and the end of the protrusion 20 passes through the fixed box 17 and covers the card slot 16, and the rotating plate 21 is rotatably set on the side wall of the support nut 4; the setting position of the card slot 16 and the rotating plate 21 correspond to each other, and the setting number of groups is the same, and the end of the rotating plate 21 is clamped in the card slot 16.

[0031] During use, in order to make the stud 14 installed on the support nut 4 have a better effect of stabilizing and preventing the locking nut 3 from loosening, after the support nut 4 is threadedly connected to the pull rod 2, adjust the position of the support nut 4 so that the rotating plate 21 is aligned with the position of the slot 16, and then press the protrusion 20 to retract it into the fixing box 17 and make the limit plate 18 compress the spring 19, and snap the rotating plate 21 into the slot 16, release the protrusion 20, and the spring 19 resets so that the protrusion 20 covers the slot 16, preventing the rotating plate 21 from falling off from the slot 16, thereby fixing the position of the support nut 4 and preventing the threaded connection between the support nut 4 and the pull rod 2 from loosening.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing loosening of the axial tie rod locking nut of a PSM rolling mill, characterized by: The invention comprises a machine body (1), a pull rod (2), a locking nut (3), a support nut (4), an anti-loosening assembly and an auxiliary assembly; the machine body (1) is provided with a pull rod (2), and the pull rod (2) is threadedly connected with a locking nut (3); the support nut (4) is threadedly connected with the pull rod (2), and the end face of the support nut (4) is provided with circular holes (5) equidistantly annularly, and the support nut (4) is provided with an anti-loosening assembly and an auxiliary assembly.

2. The anti-loosening device for the axial tie rod locking nut of a PSM rolling mill according to claim 1, characterized in that: The anti-loosening component comprises a gear (6), a threaded hole (7), a rotating ring (8), an inner gear ring (9), an outer gear ring (10), an L-shaped plate (11), a worm (12), a knob (13), a stud (14) and a connecting rod (15); the gear (6) is equidistantly rotatably arranged at the position of the circular hole (5) on the supporting nut (4), and a threaded hole (7) is provided at the center of the gear (6); the rotating ring (8) is rotatably arranged on the supporting nut (4), the inner gear ring (9) is arranged on the inner wall of the rotating ring (8), and the outer gear ring (10) is arranged on the outer wall of the rotating ring (8); the L-shaped plate (11) is symmetrically fixedly arranged on the side wall of the supporting nut (4), the two ends of the worm (12) are rotatably connected to the L-shaped plate (11), and the rotating shaft of the worm (12) passes through the L-shaped plate (11) and is fixedly connected with the knob (13); the two ends of the connecting rod (15) are fixedly connected to the stud (14).

3. The anti-loosening device for the axial tie rod locking nut of a PSM rolling mill according to claim 1, characterized in that: The auxiliary component comprises a card slot (16), a fixing box (17), a limiting plate (18), a spring (19), a protrusion (20) and a rotating plate (21); the card slot (16) is provided on the machine body (1), and the fixing box (17) is fixedly arranged on the machine body (1); the limiting plate (18) is movably connected to the fixing box (17), and a spring (19) is provided on the side end of the limiting plate (18); the protrusion (20) is fixedly arranged on the side end of the limiting plate (18), and the end of the protrusion (20) passes through the fixing box (17) and covers the card slot (16); the rotating plate (21) is rotatably arranged on the side wall of the support nut (4).

4. The anti-loosening device for the axial tie rod locking nut of a PSM rolling mill according to claim 2, characterized in that: The gear (6) and the inner gear ring (9) are arranged at corresponding positions, and the two are meshed; the outer gear ring (10) and the worm (12) are arranged at corresponding positions, have the same number of groups, and are meshed.

5. The anti-loosening device for the axial tie rod locking nut of a PSM rolling mill according to claim 2, characterized in that: The threaded hole (7), the stud (14) and the circular hole (5) are arranged at corresponding positions and have the same number of groups. The threaded hole (7) is engaged with the stud (14), the stud (14) and the circular hole (5) are sleeved, and the end of the stud (14) is clamped with the locking nut (3).

6. The anti-loosening device for the axial tie rod locking nut of a PSM rolling mill according to claim 3, characterized in that: The clamping slots (16) and the rotating plates (21) are arranged at corresponding positions and have the same number of groups, and the ends of the rotating plates (21) are clamped in the clamping slots (16).

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