A hook for die change of a wheel rolling die

Abstract

The present invention provides a lifting hook for changing molds of a wheel rolling die, which is used to hoist the rolling die onto the main shaft of the machine tool. The main body of the main shaft of the machine tool extends outward with a stepped stage having a diameter smaller than that of the main body of the main shaft of the machine tool. The lifting hook includes a main shaft of the lifting tool, and the main shaft of the lifting tool includes a lapping portion and a main shaft portion of the lifting tool. The main shaft of the lifting tool extends into the rolling die, and the main shaft portion of the lifting tool supports the rolling die. The lapping portion is lapped onto the stepped stage, so that the top surface of the main shaft of the lifting tool is horizontally aligned with the top surface of the main body of the main shaft of the machine tool, for the rolling die to be horizontally moved from the main shaft of the lifting tool onto the main shaft of the machine tool. The present invention solves the inconvenience brought by the coaxial socketing method for changing molds, and uses the lapping method to smoothly push the rolling die on the main shaft of the lifting tool onto the main shaft of the machine tool.

Description

Technical Field

[0001] The invention relates to the field of wheel equipment, in particular to a hook for changing wheel rolling moulds. Background Art

[0002] When changing the rolling molds for the steel wheel rims of passenger cars, an overhead crane is used to transfer and replace them. The mold change time of one or three rolling machines is long, which affects the equipment mobility and production efficiency. Since the overhead crane is too far away from the working ground and needs to be operated visually, it is difficult to control the height in the direction vertical to the ground, which is not conducive to the rapid and accurate replacement of the mold.

[0003] For the hook, for example, the Chinese utility model patent with the authorization announcement number CN204294777U, the application date of November 17, 2014, and the name of "A tool for changing the die for a wheel rim rolling mold"; screw the connecting sleeve onto the main shaft of the rolling machine, lift the rolling mold with the lifting hook of the lifting device, adjust the height of the lifting hook by the crane, and finally push the rolling mold onto the main shaft of the rolling machine, remove the connecting sleeve, and then fix the rolling mold on the main shaft with a nut. The connecting sleeve is coaxial with the main shaft of the rolling machine, and then the rolling mold is pushed horizontally onto the main shaft. Most of the existing technologies are to wind the rolling mold with a wire rope or pre-set the mold roll on a special lifting device, and lift the rolling mold by a crane or a forklift. Through multiple adjustments, the center hole of the mold roll is coaxial with the main shaft of the rolling machine. In this way, the coaxial requirements are high when installing the lifting device, and the stability of the lifting device is also required. In addition, the coaxial alignment back and forth reduces the efficiency of mold change.

[0004] In view of the above problems, the present invention provides a hook for changing wheel rolling molds. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a hook for changing the wheel rolling mold.

[0006] In order to achieve the purpose of shortening mold change time and improving efficiency, the present invention adopts the following specific technical solutions:

[0007] A hook for wheel rolling mold replacement is used to hoist the rolling mold onto a machine spindle, the machine spindle body of the machine spindle extending outward with a stage having a diameter smaller than that of the machine spindle body, the hook comprising: a hoist spindle;

[0008] The main shaft of the lifting device is hoisted by a lifting device;

[0009] The main shaft of the hanger includes a lap joint and a main shaft portion of the hanger, and the rolling mold is at the same height when passing through the lap joint and the main shaft portion of the hanger;

[0010] The hoisting spindle extends into the roll forming die, and the hoisting spindle part supports the roll forming die.

[0011] The overlapping part is overlapped on the table stage, so that the top surface of the hoisting spindle is horizontally aligned with the top surface of the machine table spindle body, for the roll forming die to be horizontally moved from the hoisting spindle to the machine table spindle.

[0012] Furthermore, the hook further includes a support frame.

[0013] The support frame is used to connect with the hoisting device.

[0014] One end of the hoisting spindle part far from the overlapping part is connected to the support frame.

[0015] Furthermore, the hoisting spindle part and the overlapping part are coaxially arranged.

[0016] The shape of the overlapping part is a partial cylindrical shape.

[0017] The outer diameter of the overlapping part is equal to the outer diameter of the hoisting spindle part.

[0018] Furthermore, the hoisting spindle part is a hollow circular ring structure.

[0019] Furthermore, the inner diameter of the overlapping part is greater than the inner diameter of the hoisting spindle part.

[0020] Furthermore, the outer diameter of the overlapping part is smaller than the outer diameter of the machine table spindle body.

[0021] Furthermore, the outer diameter of the overlapping part is equal to the outer diameter of the machine table spindle body.

[0022] Furthermore, a relief groove is provided between the machine table spindle body and the table stage; the hoisting spindle further includes a convex part fixedly connected to the overlapping part. When the overlapping part is overlapped with the table stage, the convex part extends into the relief groove.

[0023] Furthermore, the hoisting spindle further includes a retaining pin, and the retaining pin is detachably connected to the hoisting spindle.

[0024] Furthermore, the support frame includes a support shaft, a support plate and a lifting ring which are arranged parallel to the axis of the hoisting spindle part.

[0025] The bottom of the support plate is fixedly and vertically connected to the hoisting spindle part, the top of the support plate is fixedly and vertically connected to one end of the support shaft, and the other end of the support shaft extends towards the overlapping part.

[0026] The lifting ring is provided with a first inner hole for the support shaft to pass through; the hoisting device hoists the lifting ring.

[0027] Further, the support frame further includes a positioning device disposed on the sling, and the support shaft is slidably connected to the sling in the horizontal direction; the positioning device is used to control the sliding position of the sling on the support shaft.

[0028] Further, the positioning device is a setscrew.

[0029] Further, a handle is provided on the support plate.

[0030] The present invention can achieve the following technical effects:

[0031] (1) A hook for changing molds of a wheel rolling die adopts a lapping method. The lifting device drives the hook to fall from above the main shaft of the machine table. Compared with the coaxial socketing method in the prior art, it does not require a high coaxiality between the main shaft of the lifting tool and the main shaft of the machine table, and the method is simple.

[0032] (2) The mold changing time is shortened and the production efficiency is improved. Description of the Drawings

[0033] Figure 1 is a front view structural schematic diagram of the hook according to an embodiment of the present invention;

[0034] Figure 2 is a structural schematic diagram of the sling according to an embodiment of the present invention;

[0035] Figure 3 is a side view structural schematic diagram of the support frame according to an embodiment of the present invention;

[0036] Figure 4 is a side view structural schematic diagram of the main shaft of the lifting tool according to an embodiment of the present invention;

[0037] Figure 5 is a side view structural schematic diagram of the main shaft of the lifting tool lapping with the main body of the machine table spindle according to an embodiment of the present invention;

[0038] Figure 6 is another side view structural schematic diagram of the main shaft of the lifting tool lapping with the main body of the machine table spindle according to an embodiment of the present invention;

[0039] Figure 7 is Figure 6 a cross-sectional structural schematic diagram at C-C of

[0040] Figure 8 is a structural schematic diagram of the main shaft of the lifting tool lapping with the main body of the machine table spindle according to an embodiment of the present invention;

[0041] Figure 9 is another side view structural schematic diagram of the main shaft of the lifting tool lapping with the main body of the machine table spindle according to an embodiment of the present invention.

[0042] The reference numerals therein include: machine tool spindle main body 11, table stage 12, sling spindle 2, sling spindle part 21, overlapping part 22, protruding part 23, stop pin 24, stop pin hole 25, support shaft 31, support plate 32, handle 321, lifting ring 33, first inner hole 331, second inner hole 332, setscrew 34. Detailed implementation manners

[0043] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation to the present invention.

[0044] Figure 1 The structure of a lifting hook for changing molds of a wheel rolling die of the present invention is shown. This lifting hook is used to be hung on the hanging end of a lifting device to hoist the rolling die onto the machine tool spindle of a rolling machine. Figure 7 It is shown that the machine tool spindle in the prior art is in a stepped shape. As Figure 7 shown, the machine tool spindle sequentially includes a coaxial machine tool spindle main body 11, a relief groove and a table stage 12 from the inside to the outside. The machine tool spindle main body 11 is used to lock the rolling die.

[0045] As Figure 1 shown, the sling includes a sling spindle 2.

[0046] The lifting device hoists the sling spindle 2. As Figure 7 shown, the sling spindle 2 is an integral shaft. Hoisting an integral shaft is a prior art in the field of using a lifting device to connect a lifting hook, and the specific method will not be elaborated herein.

[0047] That is, the overlapping part 22 of the sling spindle 2 first extends into the through hole of the rolling die, and finally the rolling die is sleeved on the sling spindle part 21 and supported by the sling spindle part 21. The overlapping part 22 overlaps with the top surface of the table stage 11, so that the top surface of the sling spindle 2 is horizontally aligned with the top surface of the machine tool spindle, for the rolling die to be horizontally moved from the sling spindle 2 to the machine tool spindle. The distances from the axis of the table stage 12 to the top surface of the overlapping part 22 and the outer surface of the machine tool spindle main body 11 are equal. That is Figure 7 shown, the distance B from the axis of the machine tool spindle main body 11 to the top surface of the overlapping part 22 is equal to the distance A from the axis of the table stage 12 to the outer surface of the machine tool spindle main body 11. The rolling die is sleeved on the overlapping part 22, the shaft hole of the rolling die contacts the top surface of the overlapping part 22, and the shaft hole of the rolling die also contacts the top surface of the machine tool spindle. The lifting device hoists the lifting hook, and the sling spindle 2 contacts the table stage 12 in a lapping manner from above the machine tool spindle. The smooth horizontal transfer of the rolling die between the sling spindle 2 and the machine tool spindle main body 11 is realized.

[0048] Among them, for the rolling die, it is only necessary that the lapping part 22 and the sling spindle part 21 are at the same height, that is, there is no requirement for the same shape and outer appearance between the two. As long as the top surfaces of both in contact with the shaft hole of the rolling die are at the same horizontal height, it is ensured that the rolling die can pass horizontally through the sling spindle 2 itself.

[0049] It is easy to think that the length of the lapping part 22 should be greater than the length of the platform stage 12; in the horizontal direction, as Figure 7 shown, the machine table spindle main body 11 and the platform stage 12 form a shoulder, and the shoulder will limit the horizontal movement distance of the lapping part 22, so that when the rolling die moves from the lapping part 22 to the machine table spindle main body 11, there is no gap between the two, and the rolling die will not be stuck due to the existence of the gap.

[0050] In the prior art, the sling spindle 2 is a standard cylinder, and it must be connected to the platform stage 12 by a socketing method, which eliminates the platform stage 12 of the machine table spindle, so that the machine table spindle and the sling spindle 2 form a standard cylinder in appearance. However, the sling spindle 2 of the present hook can be placed on the platform stage 12 in a lapping manner. The bottom surface of the lapping part 22 only needs to be in contact with the outer surface of the platform stage 12, but the position of the top surface of the lapping part 22 needs to be controlled so that when the rolling die is pushed, the height of the rolling die supported by the lapping part 22 is the same as the height of the rolling die supported by the machine table spindle main body 11, so as to realize the horizontal transfer of the rolling die.

[0051] In a preferred embodiment of the present invention, the hook further includes a support frame. The sling spindle 2 as a whole is a shaft, but includes two parts, namely a lapping part 22 and a sling spindle part 21. One end of the sling spindle part 21 far from the lapping part 22 is connected to the support frame. The support frame can block the rolling die.

[0052] In a preferred embodiment of the present invention, Figure 4 shows the side view structure of the sling spindle 2 of the present invention. As Figure 1 and Figure 2 shown, the sling spindle 2 includes a sling spindle part 21 and a lapping part 22 in the shape of a partial cylinder that are coaxially connected in sequence. The sling spindle 2 as a whole is a cylinder with an opening at one end. In this way, when the rolling die on the sling spindle 2 moves from the lapping part 22 to the sling spindle part 21, there is no obstruction. Those skilled in the art should think that the angle of the arc formed by the lapping part 22 in the axial cross-section should be less than 180°, and the arched lapping part 22 is more evenly stressed and pressure-resistant.

[0053] Preferably, the main shaft portion 21 of the sling is a hollow circular ring structure, which can reduce the weight of the main shaft 2 of the sling. Preferably, the inner diameter of the overlapping portion 22 is larger than the inner diameter of the main shaft portion 21 of the sling. The overlapping portion 22 and the main shaft portion 21 of the sling form a step. Since the platform stage 11 is on the side where the step is to be descended, it is convenient for the operator to know whether the main shaft 2 of the sling has been moved above the platform stage 12 by the lifting device, and it is convenient to quickly locate the movement position of the overlapping portion 22.

[0054] In a preferred embodiment of the present invention, the outer diameter of the overlapping portion 22 is equal to the outer diameter of the main shaft of the machine table. Preferably, the dimensions and shapes of the main shaft 2 of the sling and the main shaft of the machine table match, such as Figures 8 - 9 shown, the overlapping portion 22 is a partial cylinder that fits on the outside of the platform stage 12. The inner surface of the overlapping portion 22 fits with the outer surface of the platform stage, and the outer surface of the overlapping portion 22 is the same size as the outer surface of the main body of the machine table spindle. In this way, the two are closely overlapped and the overlapping is stable.

[0055] In a preferred embodiment of the present invention, as Figure 5 and Figure 6 shown, the outer diameter of the overlapping portion 22 is smaller than the outer diameter of the main body of the machine table spindle. Figure 5 and Figure 6 The difference from Figure 6 is that the ratio of the outer diameter of the main shaft 2 of the sling to the inner diameter of the overlapping portion 22 in Figure 5 is larger than that in Figure 4 shown. At this time, the arc inner surface of the overlapping portion 22 does not serve as the bottom surface for overlapping with the platform stage, but the two adjacent surfaces to the inner surface of the arc serve as the bottom surfaces. For the convenience of processing, it is easy to think of simplifying the processing of the bottom surface where the overlapping portion 22 contacts the platform stage into a plane, as Figure 5 and Figure 6 shown. Compared with the previous preferred embodiment, as

[0056] In a preferred embodiment of the present invention, as Figure 1As shown, the sling spindle 2 further includes a protrusion 23 fixedly connected to the lapping portion 22. The end of the sling spindle 2 extends a certain distance towards the ground direction to obtain the protrusion 23, which facilitates the protrusion 23 to extend into the relief groove when the lapping portion 22 is lapped with the bench step 12. In this way, the protrusion 23 is placed in the relief groove, and the width of the protrusion 23 is equal to or less than the width of the relief groove, and there may or may not be a gap between the two. Preferably, the width of the protrusion 23 is as close as possible to the relief groove to prevent hindrance to the horizontal pushing of the roll forming die when the gap is too large. Especially when the sling spindle 2 retreats and moves away from the machine table spindle, the relief groove can hook the protrusion 23. Compared with not setting the protrusion 23, the roll forming die is also positioned between the machine table spindle and the sling spindle 2 in the direction from the machine table spindle to the lapping portion 22, preventing the position between the two from shifting. The design of the protrusion 23 ensures that the moving hook of the roll forming die and the equipment spindle do not become disengaged.

[0057] In a preferred embodiment of the present invention, the sling spindle 2 further includes a retaining pin 24, and the retaining pin 24 is detachably connected to the sling spindle 2. As Figure 1 and Figure 7 shown, a retaining pin hole 25 is provided on the sling spindle 2. When the retaining pin 24 is inserted into the retaining pin hole 25, a part of it is exposed outside the sling spindle 2. The roll forming die is placed between the retaining pin 24 and the support frame, which can prevent the roll forming die from falling. The retaining pin hole 25 is a blind hole, and the diameter is larger than that of the retaining pin 24 to achieve the detachable connection between the two. Or the retaining pin hole 25 is a through hole, and the retaining pin 24 is a structural shaft structure or has a taper, so that it does not completely fit with the retaining pin hole 25, and thus a part of it is exposed outside the retaining pin hole 25.

[0058] In a preferred embodiment of the present invention, Figure 3 shows the side view structure of the support frame of the present invention. As Figure 1 and Figure 3 shown, the support frame includes a support shaft 31 arranged parallel to the axis of the sling spindle portion 21, a support plate 32 vertically and fixedly connecting the support shaft 31 and the sling spindle portion 21, and a lifting ring 33. The support shaft 31 and the sling spindle 2 are on the same side of the support plate 32. The support shaft 31, the support plate 32 and the sling spindle 2 as a whole form a horizontally placed U shape. In this way, the overall weight of the hook tends to the end where the support frame is installed, and the roll forming die is sleeved from the lapping portion 22 far away from the support frame, which is beneficial to keeping the hook balanced. Figure 2 shows the main structure of the lifting ring 33. As Figure 2 shown, the lifting ring 33 is provided with a first inner hole 331 for the support shaft 31 to pass through. The lifting ring 33 can be fixedly connected to the support shaft 31, and a second inner hole 332 is also provided on the lifting ring 33 for being lifted by a lifting device.

[0059] Preferably, the lifting device is an electric hoist. Compared with lifting devices such as overhead cranes, the electric hoist is small in size, high in control precision, and equipped with a brake and brake structure to prevent arbitrary movement.

[0060] In a preferred embodiment of the present invention, the lifting ring 33 and the support shaft 31 can move horizontally, so that the hook has an additional counterweight function. For rolling dies of different weights, the distance between the lifting ring 33 and the support shaft 31 can be adjusted to change the lifting position and facilitate the balance of the main shaft 2 of the lifting tool. Further, the support frame further includes a positioning device provided on the lifting ring 33. The positioning device controls the moving distance of the support shaft 31 relative to the lifting ring 33. The positioning device can refer to the prior art in the mechanical field. The positioning device is used to control the sliding position of the lifting ring 33 in the axial direction of the support shaft, so that the lifting process of the rolling die is basically balanced, which is beneficial to the smooth connection of the main shaft of the lifting tool and the main shaft of the machine table.

[0061] Preferably, the positioning device is selected as a simple structure of a set screw 34. The set screw 34 passes through the lifting ring 33 and contacts the support shaft 31. Tightening or loosening the set screw 34 is used to control the sliding distance of the support shaft 31 relative to the lifting ring 33. The use of the set screw 34 is the prior art in the mechanical field and will not be elaborated here.

[0062] In a preferred embodiment of the present invention, the support plate 32 is provided with a handle 321 to facilitate manual control of the position of the hook.

[0063] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0065] The above specific implementation manners of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A lifting hook for changing molds of a wheel rolling mold, which is used to hoist the rolling mold onto the machine tool spindle. A table stage (12) with a diameter smaller than that of the machine tool spindle body (11) extends outward from the machine tool spindle body (11) of the machine tool spindle. It is characterized in that, The hook includes: a sling spindle (2); The sling spindle (2) is hoisted by a hoisting device; The sling spindle (2) includes a lapping portion (22) and a sling spindle portion (21), and when the rolling die passes through the lapping portion (22) and the sling spindle portion (21), it is at the same height; The sling spindle (2) extends into the rolling die, and the sling spindle portion (21) supports the rolling die; The lapping portion (22) is lapped on the table step (12) so that the top surface of the sling spindle (2) is horizontally aligned with the top surface of the machine table spindle body (11), for the rolling die to move horizontally from the sling spindle (2) to the machine table spindle. When lapping, the sling spindle portion (21) and the table step (12) are not coaxial; Wherein, the sling spindle portion (21) and the lapping portion (22) are coaxially arranged; The shape of the lapping portion (22) is a partial cylindrical shape; The outer diameter of the lapping portion (22) is equal to the outer diameter of the sling spindle portion (21); The sling spindle portion (21) is a hollow ring structure; The inner diameter of the lapping portion (22) is larger than the inner diameter of the sling spindle portion (21); The outer diameter of the lapping portion (22) is smaller than the outer diameter of the machine table spindle body (11).

2. The hook for mold change of a wheel rolling mold according to claim 1, characterized in that, The hook further includes a support frame; The support frame is used to connect with the hoisting device; One end of the sling spindle portion (21) far from the lapping portion (22) is connected to the support frame.

3. The hook for die change of a wheel rolling die according to claim 1, characterized in that, A relief groove is provided between the machine table spindle body (11) and the table step (12); the sling spindle (2) further includes a convex portion (23) fixedly connected to the lapping portion (22). When the lapping portion (22) is lapped with the table step (12), the convex portion (23) extends into the relief groove.

4. The hook for die change of a wheel rolling die according to claim 1, characterized in that, The sling spindle (2) further includes a retaining pin (24), and the retaining pin (24) is detachably connected to the sling spindle (2).

5. The hook for mold change of a wheel rolling mold according to claim 2, characterized in that The support frame includes a support shaft (31), a support plate (32), and a lifting ring (33) arranged parallel to the axis of the sling spindle portion (21); The bottom of the support plate (32) is fixedly and vertically connected to the sling spindle portion (21), the top of the support plate (32) is fixedly and vertically connected to one end of the support shaft (31), and the other end of the support shaft (31) extends towards the direction close to the lapping portion (22); The lifting ring (33) is provided with a first inner hole (331) for the support shaft (31) to pass through; the hoisting device hoists the lifting ring (33).

6. The hook for mold change of a wheel rolling die according to claim 5, characterized in that, The support frame further includes a positioning device arranged on the lifting ring (33), and the support shaft (31) is slidably connected to the lifting ring (33) in the horizontal direction; the positioning device is used to control the sliding position of the lifting ring (33) on the support shaft (31).

7. The hook for die change of a wheel rolling die according to claim 6, characterized in that The positioning device is a setscrew (34).

8. The hook for mold changing of a wheel rolling die according to claim 5, characterized in that, A handle (321) is arranged on the support plate (32).

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