Rotary transmission structure of holding and conveying trolley of cold rolling mill

Abstract

The utility model discloses a rotary transmission structure of a holding and conveying trolley of a cold rolling mill, which comprises a base frame, a transmission gear box, a hollow shaft gear, a rotary hollow shaft, a transmission gear and a transmission rotating shaft, and the base frame is provided with a through workpiece guide channel along the length direction; the transmission gear box is fixedly mounted below the base frame; the hollow shaft gear is rotatably assembled in the transmission gear box, the hollow shaft gear is provided with a through central shaft hole, and at least two pairs of key grooves are formed in the inner wall of the central shaft hole in the circumferential direction at intervals; the rotary hollow shaft is rotationally mounted on the base frame, and a through hole corresponding to the workpiece guide channel is formed in the rotary hollow shaft; the transmission gear is fixedly arranged on the periphery of the rotary hollow shaft in a sleeving mode, and the transmission gear is in meshing transmission with the hollow shaft gear. According to the utility model, after the key slot is abraded, the device can be quickly recovered, the whole device does not need to be disassembled, the maintenance time and cost are reduced, and the use convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of rotary transmission structure of cold rolling mill holding and sending trolley, belong to cold rolling equipment technical field. BACKGROUND

[0002] Currently, workpiece feeding and rotating work during cold rolling machine processing need to be completed by trolley, wherein transmission shaft is connected with transmission gear through key, and then the rotation of rotary hollow shaft is realized by the meshing transmission of transmission gear and hollow shaft gear, so as to drive workpiece to complete rotating movement.

[0003] Chinese patent with publication number CN218692616U discloses a cold rolling pipe machine continuous rolling holding and sending trolley, which reduces the situation of hollow pipe being crushed and worn by setting anti-slip pad. However, under long-term use, since rotation needs feeding at the same time, the key groove of transmission gear bears radial and axial forces at the same time, and will accelerate wear under heavy load. It is time-consuming and laborious to disassemble and replace, and also increases cost, and the downtime is long, which affects production efficiency. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of prior art, provide a rotary transmission structure of cold rolling mill holding and sending trolley, which can be quickly restored for use after key groove wear without disassembling the whole, reduce maintenance time and cost, and improve use convenience.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a rotary transmission structure of cold rolling mill holding and sending trolley, comprising:

[0006] A base frame is provided with a workpiece guiding channel penetrating along the length direction;

[0007] A transmission gear box is fixedly installed below the base frame;

[0008] A hollow shaft gear is rotatably assembled in the transmission gear box, the hollow shaft gear has a through central shaft hole, and at least two pairs of key grooves are arranged on the inner wall of the central shaft hole in the circumferential direction;

[0009] A rotary hollow shaft is rotatably installed on the base frame, and the rotary hollow shaft is provided with a through hole corresponding to the workpiece guiding channel;

[0010] A transmission gear is fixedly sleeved on the outer periphery of the rotary hollow shaft, and the transmission gear is in meshing transmission with the hollow shaft gear;

[0011] A transmission rotating shaft is detachably inserted into the central shaft hole of the hollow shaft gear, and the outer wall of the transmission rotating shaft is provided with at least one pair of outer key grooves.

[0012] Further, a plurality of threaded connection holes are uniformly arranged on the end face of the hollow shaft gear in the circumferential direction.

[0013] The rotary transmission structure of the cold rolling mill holding and feeding trolley further comprises a slide key fixing gland, and the slide key fixing gland is provided with a through hole corresponding to the threaded connection hole.

[0014] Further, a specific structure of a clamping mechanism is provided, and the rotary transmission structure of the cold rolling mill holding and feeding trolley further comprises a clamping mechanism, which comprises:

[0015] A driving mechanism is mounted on the base frame, and the driving mechanism is provided with a connecting portion.

[0016] A mounting seat is mounted on the connecting portion of the driving mechanism.

[0017] A holding cylinder is rotatably mounted on the mounting seat, and the holding cylinder is provided with a tapered cavity in communication with the through hole of the rotary hollow shaft.

[0018] At least two clamping claws are mounted on the corresponding mounting slots.

[0019] The driving mechanism is adapted to drive the mounting seat and the holding cylinder to move along the axis.

[0020] Further, a specific structure of a driving mechanism is provided, and the two sides of the mounting seat are provided with vertical guide grooves.

[0021] The base frame is provided with a guide pillar.

[0022] The driving mechanism comprises:

[0023] A telescopic driving mechanism is mounted on the base frame, and the telescopic driving mechanism is provided with an output end.

[0024] A linkage swing arm is hingedly connected to the output end of the telescopic driving mechanism at one end and is provided with a sliding guide groove at the other end, and the sliding guide groove is slidingly arranged on the guide pillar.

[0025] At least one vertical slider is slidingly arranged in the corresponding vertical guide slot, and a connecting shaft is arranged outside the vertical slider and is hinged to the hinge hole of the linkage swing arm.

[0026] Further, a specific structure of the telescopic driving mechanism is provided, and the telescopic driving mechanism is an oil cylinder.

[0027] Further, two groups of key grooves are arranged in the inner wall of the central shaft hole of the hollow shaft gear, and the two groups of key grooves are arranged in a cross shape.

[0028] Further, the rotary transmission structure of the cold rolling mill holding and feeding trolley further comprises a feeding nut mechanism, and the feeding nut mechanism comprises:

[0029] A machine base is fixedly installed on the side of the base frame, and the machine base is provided with a through hole;

[0030] A nut seat is installed in the through hole of the machine base, and the nut seat is provided with an internal thread matched with the screw rod.

[0031] Further, the feeding nut mechanism is provided with two, which are symmetrically arranged on the two sides of the base frame.

[0032] By adopting the above technical scheme, the utility model has the following beneficial effects:

[0033] In the utility model, when running, the transmission shaft is inserted into the central shaft hole of the hollow shaft gear, is connected through the outer key groove of the transmission shaft, the key groove of the hollow shaft gear and the sliding key, is driven to rotate by the meshing transmission of the hollow shaft gear and the transmission gear, and the rotary hollow shaft is driven to rotate. When the key groove of the hollow shaft gear is worn due to long-term use, the transmission shaft is pulled out, is reinserted after being rotated by 90 degrees, the outer key groove of the transmission shaft is matched with the non-worn key groove in the hollow shaft gear again, the overall structure does not need to be disassembled, the normal operation of the equipment is quickly restored, the maintenance time is reduced, and the service life and the convenience are improved.

[0034] In addition, the sliding key fixing gland is fixedly connected through the fastener passing through the through hole and the threaded connection hole, so as to limit the axial position of the sliding key, prevent the sliding key from loosening, and ensure the stable transmission. The clamping mechanism enables the workpiece to be stably clamped and synchronously rotated with the rotary hollow shaft through the cooperation of the driving mechanism, the mounting seat, the holding cylinder and the claw, so that the machining accuracy is not affected due to deviation. Meanwhile, the driving mechanism enables the holding cylinder to move stably along the axis through the cooperation of the linkage swing arm and the vertical slider, and the feeding nut mechanism enables the workpiece to be stably pushed and pulled to feed, and the transmission balance is ensured through the symmetrically arranged nut seats, so that the operation stability of the overall equipment is improved.

[0035] In summary, the utility model improves the maintenance efficiency of the equipment, reduces the maintenance cost, and avoids the influence of key groove wear on production. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of the rotary transmission structure of the cold rolling mill trolley according to the present invention. Figure 1 ;

[0037] Figure 2 This is a cross-sectional view of the rotary transmission structure of the cold rolling mill trolley according to this utility model;

[0038] Figure 3 for Figure 1 A magnified view of part A in the middle;

[0039] Figure 4 This is a three-dimensional structural diagram of the rotary transmission structure of the cold rolling mill trolley according to the present invention. Figure 2 ;

[0040] Figure 5 This is a three-dimensional structural diagram of the rotary transmission structure of the cold rolling mill trolley according to the present invention. Figure 3 . Detailed Implementation

[0041] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0042] like Figures 1-5 As shown, a rotary transmission structure for a cold rolling mill conveyor trolley includes:

[0043] The base frame 1 has a through workpiece guide channel along its length.

[0044] Transmission gearbox 2 is fixedly installed below the base frame 1;

[0045] Hollow shaft gear 3 is rotatably mounted in transmission gearbox 2. Hollow shaft gear 3 has a through central shaft hole, and the inner wall of the central shaft hole is provided with two pairs of keyways 4 spaced circumferentially.

[0046] A rotary hollow shaft 5 is rotatably mounted on the base frame 1. The rotary hollow shaft 5 is provided with a through hole corresponding to the workpiece guide channel.

[0047] The transmission gear 6 is fixedly mounted on the outer circumference of the hollow rotating shaft 5, and the transmission gear 6 meshes with the hollow shaft gear 3 for transmission.

[0048] The transmission shaft 7 is detachably inserted into the central shaft hole of the hollow shaft gear 3. The outer wall of the transmission shaft 7 is provided with a pair of keyways 8. The outer keyway 8 of the transmission shaft 7 is connected to the keyway 4 in the central shaft hole of the hollow shaft gear 3 by a detachable sliding key 9.

[0049] In the embodiment, as shown in Figures 2-3 the transmission shaft 7 is inserted into the central shaft hole of the hollow shaft gear 3, connected through the outer key groove 8 of the transmission shaft, the key groove 4 of the hollow shaft gear and the sliding key, driven to rotate the rotary hollow shaft 5 through the meshing transmission of the hollow shaft gear 3 and the transmission gear 6. When the key groove 4 of the hollow shaft gear 3 is worn due to long-term use, the transmission shaft 7 is pulled out, rotated by 90° and re-inserted, so that the outer key groove 8 of the transmission shaft 7 is re-connected with the non-worn key groove 4 in the hollow shaft gear 3. Without disassembling the overall structure, the normal operation of the equipment is quickly restored, and the maintenance time is reduced.

[0050] Specifically, as shown in Figures 2-3 four threaded connection holes 10 are uniformly arranged on the end face of the hollow shaft gear 3 in the circumferential direction;

[0051] The rotary transmission structure of the cold rolling mill holding and conveying trolley further comprises a sliding key fixing gland 11, the sliding key fixing gland 11 is provided with a through hole 12 corresponding to the threaded connection hole 10, and the sliding key fixing gland 11 is adapted to be fixedly connected with the threaded connection hole 10 through the fastener penetrating through the through hole 12, so as to limit the axial position of the sliding key 9.

[0052] In the embodiment, as shown in Figures 2-3 after the sliding key fixing gland 11 is fixedly connected with the threaded connection hole 10 on the end face of the hollow shaft gear 3 through the fastener, the sliding key 9 can be limited in the key groove 4 of the hollow shaft gear 3, so as to prevent the axial displacement of the sliding key 9 during the operation of the equipment. When the hollow shaft gear 3 needs to be overhauled or the sliding key 9 needs to be replaced, the sliding key 9 can be conveniently taken out by only disassembling the sliding key fixing gland 11, without disassembling the entire transmission system.

[0053] Specifically, as shown in Figures 1-2 the rotary transmission structure of the cold rolling mill holding and conveying trolley further comprises a clamping mechanism, which comprises:

[0054] a driving mechanism 17, the driving mechanism 17 is installed on the base frame 1, and the driving mechanism 17 is provided with a connecting portion;

[0055] a mounting seat 13, the mounting seat 13 is installed on the connecting portion of the driving mechanism 17;

[0056] a holding cylinder 14, the holding cylinder 14 is rotatably installed on the mounting seat 13, and the holding cylinder 14 is provided with a conical cavity 19 in communication with the through hole of the rotary hollow shaft 5, and the inner wall of the conical cavity 19 is provided with a plurality of mounting grooves 15 extending in the axial direction;

[0057] three clamping claws (not shown in the figure), the clamping claws are installed on the corresponding mounting grooves 15;

[0058] The driving mechanism 17 is adapted to drive the mounting base 13 and the sleeve 14 to move along the axis.

[0059] Specifically, as shown in Figures 1-2 and Figures 4-5 , the mounting base 13 is provided with vertical guide grooves 133 on both sides;

[0060] The base frame 1 is provided with guide pillars 111;

[0061] The driving mechanism 17 comprises:

[0062] The telescopic driving mechanism 20 is installed on the base frame 1, and is provided with an output end 21;

[0063] The linkage swing arm 22 is hingedly connected to the output end 21 of the telescopic driving mechanism 20 at one end, and is provided with a sliding guide groove 23 at the other end, which is slidingly arranged on the guide pillar 111. The linkage swing arm 22 is provided with a hinge hole 24 in the middle.

[0064] Two vertical sliding blocks 25 are slidingly arranged in the corresponding vertical guide grooves 133, and are provided with connecting shafts on the outer sides, which are hingedly connected to the hinge hole 24 of the linkage swing arm 22.

[0065] Specifically, as shown in Figure 4 , the telescopic driving mechanism 20 is an oil cylinder.

[0066] In this embodiment, as shown in Figure 2 and Figure 4 , the telescopic driving mechanism 20 drives the upper end of the linkage swing arm 22 to move through the output end 21. The telescopic driving mechanism 20 is an oil cylinder, and is provided with a piston rod. When the piston rod of the oil cylinder is extended, the linkage swing arm 22 swings around the hinge point of the guide pillar 111, and at the same time, the middle of the linkage swing arm 22 drives the mounting base 13 to move along the axis through the vertical sliding block 25.

[0067] Specifically, as shown in Figures 2-3 , two sets of key grooves 4 are arranged on the inner wall of the central shaft hole of the hollow shaft gear 3, and the two sets of key grooves 4 are arranged in a cross shape.

[0068] Specifically, as shown in Figure 1 and Figure 5 , the cold rolling machine sleeve trolley rotary transmission structure further comprises a feeding nut mechanism, which comprises:

[0069] The machine seat 31 is fixedly installed on the side of the base frame 1, and is provided with a through hole;

[0070] The nut seat 33 is installed in the through hole of the machine seat 31, and is provided with an internal thread adapted to cooperate with the screw rod.

[0071] Specifically, as shown in Figure 1 The feed nut mechanism is provided with two, respectively symmetrically arranged on both sides of the base frame 1.

[0072] In this embodiment, as shown in Figures 2-3 And Figure 5 When a set of keyways 4 is worn due to long-term use, the transmission shaft 7 can be removed and rotated 90°, so that the keyway 8 on the transmission shaft 7 is aligned with another set of unworn keyways 4, and then reconnected through the sliding key 9, thereby prolonging the service life.

[0073] The feed nut mechanism is fixed to the side of the base frame 1 through the machine base 31, and the internal thread in the nut seat 33 cooperates with the screw rod, so that when the screw rod rotates, the nut seat 33 feeds axially. Two feed nut mechanisms are symmetrically arranged on both sides of the base frame 1, which can simultaneously use two screw rods for guiding and supporting, ensuring that the feed motion of the screw rod is stable and coordinated.

[0074] The above specific embodiments further illustrate the technical problems, technical solutions and beneficial effects solved by the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary drive structure of a cold rolling mill pinch trolley, characterized in that, It comprises: a base frame (1) provided with a workpiece guide channel through it in the length direction; a transmission gear box (2) fixedly installed below the base frame (1); a hollow shaft gear (3) rotatably assembled in the transmission gear box (2), the hollow shaft gear (3) having a through central shaft hole, the inner wall of the central shaft hole being provided with at least two pairs of key grooves (4) in the circumferential direction; a rotating hollow shaft (5) rotatably installed on the base frame (1), the rotating hollow shaft (5) being provided with a through hole corresponding to the workpiece guide channel; a transmission gear (6) fixedly sleeved on the outer periphery of the rotating hollow shaft (5), the transmission gear (6) being in meshing transmission with the hollow shaft gear (3); a transmission rotating shaft (7) detachably inserted into the central shaft hole of the hollow shaft gear (3), the outer wall of the transmission rotating shaft (7) being provided with at least one pair of outer key grooves (8), the outer key grooves (8) of the transmission rotating shaft (7) being connected with the key grooves (4) in the central shaft hole of the hollow shaft gear (3) through a detachable sliding key (9).

2. The rotating transmission structure of the cold rolling machine holding and feeding trolley according to claim 1, wherein: a plurality of threaded connection holes (10) are uniformly arranged on the end face of the hollow shaft gear (3) in the circumferential direction; and further comprising a sliding key fixing gland (11) provided with a through hole (12) corresponding to the threaded connection hole (10), the sliding key fixing gland (11) being adapted to be fixedly connected with the threaded connection hole (10) through a fastener passing through the through hole (12) to define the axial position of the sliding key (9).

3. The rotating transmission structure of the cold rolling machine holding and feeding trolley according to claim 1, wherein: and further comprising a clamping mechanism comprising: a driving mechanism (17) installed on the base frame (1), the driving mechanism (17) being provided with a connecting portion; a mounting seat (13) mounted on the connecting portion of the driving mechanism (17); a holding cylinder (14) rotatably mounted on the mounting seat (13), the holding cylinder (14) being provided with a tapered cavity (19) in communication with the through hole of the rotating hollow shaft (5) inside, the inner wall of the tapered cavity (19) being provided with a plurality of mounting grooves (15) extending in the axial direction; at least two clamping claws mounted on the corresponding mounting grooves (15); the driving mechanism (17) being adapted to drive the mounting seat (13) and the holding cylinder (14) to move along the axis.

4. The rotating transmission structure of the cold rolling machine holding and feeding trolley according to claim 3, wherein: vertical guide grooves (133) are provided on both sides of the mounting seat (13); a guide pillar (111) is provided on the base frame (1); the driving mechanism (17) comprising: A telescopic driving mechanism (20) is mounted on the base frame (1), and the telescopic driving mechanism (20) is provided with an output end (21); A linkage swing arm (22) is hingedly connected to the output end (21) of the telescopic driving mechanism (20) at one end, and is provided with a sliding guide groove (23) at the other end, the sliding guide groove (23) is slidingly arranged on the guide pillar (111), and the linkage swing arm (22) is provided with a hinge hole (24) in the middle; At least one vertical sliding block (25) is slidingly arranged in the corresponding vertical guide groove (133), and the vertical sliding block (25) is provided with a connecting shaft on the outside, and the connecting shaft is hingedly connected with the hinge hole (24) of the linkage swing arm (22).

5. The rotary transmission structure of the cold rolling mill holding and feeding trolley according to claim 4, wherein the telescopic driving mechanism (20) is an oil cylinder.

6. The rotary transmission structure of the cold rolling mill holding and feeding trolley according to claim 1, wherein the hollow shaft gear (3) is provided with two groups of key grooves (4) on the inner wall of the central shaft hole, and the two groups of key grooves (4) are arranged in a cross shape.

7. The rotary transmission structure of the cold rolling mill holding and feeding trolley according to claim 1, further comprising a feeding nut mechanism, wherein the feeding nut mechanism comprises: a machine base (31) fixedly mounted on the side of the base frame (1), the machine base (31) being provided with a through hole; a nut seat (33) mounted in the through hole of the machine base (31), and the nut seat (33) being provided with an internal thread adapted to cooperate with a lead screw.

8. The rotary transmission structure of the cold rolling mill holding and feeding trolley according to claim 7, wherein the feeding nut mechanism is provided with two, which are symmetrically arranged on the two sides of the base frame (1). ​ ​ ​ ​

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