Improved transmission device for rotation of tong head of forging charging and taking machine

Abstract

The utility model discloses an improved transmission device for rotation of a tong head of a forging charging and taking machine. The device is characterized in that a pull rod is connected with a cylinder rod of a clamping oil cylinder in a hollow shaft through an involute spline; the involute spline is provided with an inner insection, the tail end of a cylinder rod of the clamping oil cylinder is provided with an outer insection and a shaft shoulder, the other end of the pull rod is provided with an outer insection and a shaft shoulder, and the outer insection and the outer insection are both meshed with the inner insection. The two shaft shoulders make contact with the two sides of the involute spline. The cylinder rod and the pull rod are in threaded connection with the involute spline in the vertical direction through a positioning bolt, an outer spline is arranged on the outer wall of a cylinder body of the clamping oil cylinder, the worm and gear box is arranged on the clamping oil cylinder in a sleeving mode, an inner spline matched with the outer spline is arranged on the inner wall of the worm gear, and shells on the two sides of the worm and gear box are fixedly connected with the hollow shaft and the clamping oil cylinder respectively. According to the utility model, the efficiency loss in the torque transmission process can be reduced to the greatest extent, the stability of the connecting structure is improved, the energy loss is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to a field, in particular to an improved transmission device for rotating the clamp head of a forging loading and unloading machine. Background Art

[0002] The loading and unloading machine is mainly used to load and unload materials into the chamber furnace, and can take the workpiece out of the furnace and transfer it to the forging equipment for forging. It is suitable for the transportation of hot and cold billets in the forging workshop, and can assist the forging equipment to complete some simple tasks, such as loading and unloading the horse frame, anvil, picking up tools, etc. It replaces the heavy manual labor, greatly improves the working conditions of industry workers, and improves productivity.

[0003] The forging loader has mature technology, simple structure and convenient maintenance. It can clamp the billet or forging from the ground and in the furnace to complete five actions: vehicle body walking and turning, clamp frame lifting and lowering, clamp rod tilting and tilting, clamp head rotating, and clamp clamping. Among them, clamp head rotation is one of the main actions of the forging loader.

[0004] The rotation of the clamp head is one of the main actions of the forging loader. The traditional loader adopts a worm gear device to rotate the clamp head, that is, the motor drives the worm gear to rotate, and the worm gear and the hollow shaft are connected by a key, which makes the hollow shaft relatively long and the overall size of the machine large, making it inconvenient to move when working in narrow places. In addition, because the hollow shaft is long, it is difficult for the clamp head at the front to stably clamp the material and rotate during movement.

[0005] In the existing technical solutions, such as the transmission device for rotating the clamp head of a forging loader with the authorization announcement number CN 212704217 U, the clamping cylinder is fixedly connected to the hollow shaft inside the frame; the outer shell of the worm gear rotating device is installed on the frame, and the end face of the worm gear is fixedly connected to the connecting flange; the clamping cylinder passes through the through holes of the worm gear and the connecting flange, and one end is fixed to the connecting flange. The power source for the rotation of the clamp head in this transmission device is the worm gear rotating device, the end face of the worm gear is connected to the connecting flange, and the connecting flange is further connected and fixed to the clamping cylinder, thereby transmitting the worm gear torque to the clamp head as a whole, causing the clamp head as a whole to twist. This way of transmitting torque has efficiency loss; at the same time, the hollow shaft and the clamping cylinder are connected by bolts, and this connection method also has efficiency loss for torque transmission. Therefore, this solution has a large efficiency loss in transmitting torque, resulting in power waste, and also has the problem of lack of connection stability.

[0006] In order to solve the above technical problems, the utility model proposes an improved transmission device for rotating the clamp head of a forging loading and unloading machine. Summary of the invention

[0007] The purpose of the utility model is to overcome the deficiencies of the prior art and propose an improved transmission device for rotating the clamp head of a forging loader, which can minimize the efficiency loss in the torque transmission process, while increasing the stability of the connection structure, reducing energy loss and improving economic benefits.

[0008] In order to achieve the above objectives, the utility model proposes the following technical solutions:

[0009] An improved transmission device for rotating the clamp head of a forging loading and unloading machine comprises a frame, a hollow shaft, a pull rod, a clamping oil cylinder, a worm gear box, a clamp head assembly, an involute spline and a positioning bolt, wherein the hollow shaft is arranged in the frame and the two are fixedly connected; one end of the pull rod passes through the hollow shaft and is connected to the clamp head assembly, and the other end of the pull rod is connected to the cylinder rod of the clamping oil cylinder in the hollow shaft through an involute spline;

[0010] The involute spline is provided with an internal tooth pattern, and the end of the cylinder rod of the clamping cylinder is provided with a first external tooth pattern and a first shoulder, the first shoulder is located inside the first external tooth pattern, and the outer diameter of the first shoulder is greater than or equal to the tooth top circle of the first external tooth pattern; the other end of the pull rod is provided with a second external tooth pattern and a second shoulder, the second shoulder is located inside the second external tooth pattern, and the outer diameter of the second shoulder is greater than or equal to the tooth top circle of the second external tooth pattern; the first external tooth pattern and the second external tooth pattern are both meshed with the internal tooth pattern; the first shoulder is in contact with one side of the involute spline, and the second shoulder is in contact with the other side of the involute spline;

[0011] The cylinder rod and the pull rod of the clamping cylinder are threadedly connected with the involute spline through positioning bolts in the vertical direction, so that the positions between the cylinder rod, the pull rod and the involute spline are limited, and the structure is more stable;

[0012] The cylinder body of the clamping oil cylinder is cylindrical, and the cylinder body wall of the clamping oil cylinder is provided with an external spline. The worm gear box is sleeved on the clamping oil cylinder. The worm gear box includes a worm gear and a driving motor of the worm gear that mesh with each other. The inner wall of the worm gear is provided with an internal spline that matches the external spline to form a spline connection, thereby completing the torque transmission between the worm gear and the clamping oil cylinder. The driving motor provides rotational power to the worm gear, and the rotation of the worm gear drives the worm gear to rotate, which in turn drives the clamping oil cylinder to rotate as a whole, thereby driving the pull rod and the clamp head assembly, thereby realizing the transmission process of the rotation of the clamp head assembly;

[0013] The outer shells on both sides of the worm gear box are respectively fixedly connected to the hollow shaft and the clamping cylinder, so as to fix the worm gear and the clamping cylinder in the axial direction.

[0014] Preferably, two sides of the worm gear box housing are respectively threadedly connected to the hollow shaft and the clamping cylinder through flange covers.

[0015] Preferably, the internal tooth patterns are respectively the first internal tooth pattern and the second internal tooth pattern; the first internal tooth pattern and the second internal tooth pattern are respectively arranged at two ends of the inner wall of the involute spline; an inner protruding ring is arranged between the first internal tooth pattern and the second internal tooth pattern, and the inner diameter of the inner protruding ring is less than or equal to the minimum tooth top circle diameter of the first internal tooth pattern and the second internal tooth pattern.

[0016] Preferably, a first lap joint tube is further provided at the end of the cylinder rod of the clamping cylinder. The first lap joint tube is located outside the first external tooth pattern. The outer wall diameter of the first lap joint tube matches the inner diameter of the inner protruding ring of the involute spline, so that the first lap joint tube can be inserted into the inner protruding ring, and the outer wall of the first lap joint tube is in close contact with the inner wall of the inner protruding ring; the first external tooth pattern is meshed with the second internal tooth pattern, and the side surface of the first external tooth pattern is in contact with the side wall of the inner protruding ring; the outer diameter of the first shaft shoulder is greater than the tooth top circle diameter of the first external tooth pattern, and the side surface of the first shaft shoulder is in contact with one side of the involute spline;

[0017] A second lap tube is also provided at the end of the other end of the pull rod, and the second lap tube is located outside the second external tooth pattern. The outer diameter of the second lap tube matches the inner diameter of the first lap tube, and the second lap tube is inserted into the first lap tube, and the two are in close contact; the second external tooth pattern is meshed with the first internal tooth pattern, and the side surface of the second external tooth pattern contacts the other side wall of the inner protruding ring; the outer diameter of the second shaft shoulder is larger than the tooth top circle diameter of the second external tooth pattern, and the side surface of the second shaft shoulder contacts the other side of the involute spline; the other end of the pull rod and the cylinder rod of the clamping cylinder are respectively inserted into the involute spline from both ends, the second lap tube is inserted into the first lap tube, and the protruding block is inserted into the groove.

[0018] Preferably, the inner wall of the first lap joint tube is provided with an inward protrusion, and the outer wall of the second lap joint tube is provided with a groove matching the protrusion. The first lap joint tube and the second lap joint tube form a key connection through the protrusion and the groove, which further improves the structural stability and the transmission efficiency.

[0019] Preferably, a longitudinal countersunk cylindrical hole is provided in the middle position of the involute spline; a longitudinal first threaded hole is provided on the first lap joint tube; a second threaded hole matching the first threaded hole is provided on the second lap joint tube; the positioning bolt passes through the countersunk cylindrical hole, the first threaded hole and the second threaded hole in sequence to form a threaded connection, thereby achieving axial fixation of the involute spline, the pull rod and the clamping cylinder, forming a stable connection structure, and enhancing the stability of the overall device.

[0020] Preferably, the first internal tooth pattern and the second internal tooth pattern on the inner wall of the involute spline are consistent in all dimensions, which is convenient for processing and installation.

[0021] Preferably, the outer diameter of the first shoulder is smaller than the outer diameter of the involute spline, so as to protect the clamping cylinder.

[0022] Preferably, the outer diameter of the second shoulder is smaller than the outer diameter of the involute spline, so as to protect the pull rod.

[0023] Preferably, a buffer ring is sleeved on the first external tooth pattern, so that the first shaft shoulder and the involute spline are in contact through the buffer ring, which has a certain buffering effect, thereby protecting parts and reducing wear.

[0024] Preferably, a buffer ring is sleeved on the second external tooth pattern, so that the second shaft shoulder and the involute spline are in contact through the buffer ring, which has a certain buffering effect, thereby protecting parts and reducing wear.

[0025] Preferably, a buffer ring is sleeved on the first overlapping tube, so that the side surface of the first outer tooth pattern contacts the side wall of the inner protruding ring through the buffer ring, which has a certain buffering effect, thereby protecting the components and reducing wear.

[0026] Preferably, a buffer ring is sleeved on the second overlapping tube, so that the side surface of the second outer tooth pattern contacts the other side wall of the inner protruding ring through the buffer ring, which has a certain buffering effect, thereby protecting parts and reducing wear.

[0027] Preferably, the length of the second outer tooth pattern is consistent with the length of the first inner tooth pattern, so as to further improve the transmission efficiency.

[0028] Preferably, the length of the first outer tooth pattern is consistent with the length of the second inner tooth pattern, so as to further improve the transmission efficiency.

[0029] Preferably, the length of the second overlapping tube is consistent with that of the first overlapping tube, so as to further improve the transmission efficiency.

[0030] Generally speaking, the worm provides rotational power through the rotating motor, the rotating motor drives the worm to rotate, the rotation of the worm drives the worm wheel to rotate, the rotation of the worm wheel drives the clamping cylinder to rotate as a whole, and the pull rod connected by the involute spline rotates accordingly.

[0031] Specifically, when the pull rod and the cylinder rod of the clamping cylinder are connected, the other end of the pull rod and the cylinder rod of the clamping cylinder extend into the involute spline from both sides respectively, the second external tooth pattern of the other end of the pull rod meshes with the internal tooth pattern of the involute spline, and the first external tooth pattern of the cylinder rod of the clamping cylinder meshes with the internal tooth pattern of the involute spline; at the same time, the first shaft shoulder contacts one side of the involute spline, and the second shaft shoulder contacts the other side of the involute spline;

[0032] The cylinder rod and the pull rod of the clamping cylinder are threadedly connected with the involute spline in the vertical direction through positioning bolts, so that the positions between the cylinder rod, the pull rod and the involute spline are limited, and the structure is more stable.

[0033] The worm gear box is sleeved on the clamping cylinder, and the inner spline of the inner wall of the worm gear meshes with the outer spline of the outer wall of the clamping cylinder body to form a spline connection, completing the torque transmission between the worm gear box and the clamping cylinder. The outer shells on both sides of the worm gear box are fixedly connected to the hollow shaft and the clamping cylinder respectively, forming axial fixation of the worm gear and the clamping cylinder.

[0034] During operation, the drive motor provides rotational power to the worm, and the rotation of the worm drives the worm wheel to rotate, which in turn drives the clamping cylinder to rotate as a whole, thereby driving the pull rod and the clamp head assembly, thereby realizing the transmission process of the clamp head assembly rotating.

[0035] Since the worm gear and the cylinder body of the clamping cylinder transmit torque directly through the spline, the transmission efficiency is greatly improved. The cylinder rod and the pull rod of the clamping cylinder transmit torque through the involute spline, and the transmission efficiency is higher than other transmission structures, which reduces power loss, can reduce energy loss, reduce costs, and improve economic benefits.

[0036] The beneficial effects of the utility model are:

[0037] The utility model connects the pull rod and the clamping cylinder rod through the involute spline, and the spline connects the worm gear box and the clamping cylinder body. The torque transmission process is transmitted by the spline, the transmission efficiency is significantly improved, the power loss is reduced, the energy loss can be reduced, the cost is reduced, and the economic benefit is improved.

[0038] The utility model has a more stable structure, a more reasonable design and simpler operation by compactly and reasonably designing the connection structure between the pull rod, the involute spline and the clamping oil cylinder rod.

[0039] The utility model designs a lap joint tube at the end of the pull rod and the end of the cylinder rod. The two lap joint tubes are overlapped in the form of a protruding block and a groove to form a key connection, which cooperates with the involute spline connection to form a more efficient torque transmission effect.

[0040] By adopting the above scheme, the utility model can increase the connection stability between the hollow shaft and the clamping cylinder, minimize the efficiency loss in the torque transmission process, and at the same time increase the stability of the connection structure, reduce energy loss, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0042] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0043] Figure 2 It is a schematic diagram of the exploded structure of the first embodiment.

[0044] Figure 3 is an assembled perspective view of the first embodiment.

[0045] Figure 4 It is a schematic diagram of the assembly structure of the second embodiment.

[0046] Figure 5 It is a schematic diagram of the exploded structure of the second embodiment.

[0047] Figure 6 is a cross-sectional view of the second embodiment.

[0048] Figure 7 is a cross-sectional view of the involute spline in the second embodiment.

[0049] In the figure, 1-frame, 2-hollow shaft, 3-involute spline, 4-clamping cylinder, 5-worm gear box, 6-external spline, 7-pull rod, 8-positioning bolt;

[0050] 31-first inner tooth pattern, 32-second inner tooth pattern, 33-inner protruding ring, 34-counter countersunk cylindrical hole;

[0051] 41-first external tooth pattern, 42-first lap joint, 43-first threaded hole, 44-first shaft shoulder, 45-protruding block, 51-worm, 52-worm wheel;

[0052] 71 - second external tooth pattern, 72 - second overlapping sleeve, 73 - second threaded hole, 74 - second shaft shoulder, 75 - groove. Implementation

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0055] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] First embodiment:

[0058] like Figures 1 to 3 As shown, an improved transmission device for rotating the clamp head of a forging loading and unloading machine includes a frame 1, a hollow shaft 2, a pull rod 7, a clamping cylinder 4, a worm gear box 5, a clamp head assembly, an involute spline 3 and a positioning bolt 8. The hollow shaft 2 is arranged in the frame 1, and the two are fixedly connected; one end of the pull rod 7 passes through the hollow shaft 2 and is connected to the clamp head assembly, and the other end of the pull rod 7 is connected to the cylinder rod of the clamping cylinder 4 in the hollow shaft 2 through the involute spline 3;

[0059] The involute spline 3 is provided with an internal tooth pattern, and the end of the cylinder rod of the clamping oil cylinder 4 is provided with a first external tooth pattern 41 and a first shaft shoulder 44, the first shaft shoulder 44 is located inside the first external tooth pattern 41, and the outer diameter of the first shaft shoulder 44 is greater than or equal to the tooth top circle of the first external tooth pattern 41; the other end of the pull rod 7 is provided with a second external tooth pattern 71 and a second shaft shoulder 74, the second shaft shoulder 74 is located inside the second external tooth pattern 71, and the outer diameter of the second shaft shoulder 74 is greater than or equal to the tooth top circle of the second external tooth pattern 71; the first external tooth pattern 41 and the second external tooth pattern 71 are both meshed with the internal tooth pattern; the first shaft shoulder 44 is in contact with one side of the involute spline 3, and the second shaft shoulder 74 is in contact with the other side of the involute spline 3;

[0060] The cylinder rod and the pull rod 7 of the clamping cylinder 4 are threadedly connected with the involute spline 3 via the positioning bolt 8 in the vertical direction;

[0061] The cylinder body of the clamping oil cylinder 4 is cylindrical, and the outer cylinder body wall of the clamping oil cylinder 4 is provided with an external spline 6. The worm gear box 5 is sleeved on the clamping oil cylinder 4. The worm gear box 5 includes a worm wheel 52 and a worm 51 that are meshed with each other and a driving motor of the worm 51. The inner wall of the worm wheel 52 is provided with an internal spline that matches the external spline 6 to form a spline connection, thereby completing the torque transmission between the worm wheel 52 and the clamping oil cylinder 4. The driving motor provides rotational power to the worm 51, and the rotation of the worm 51 drives the worm wheel 52 to rotate, and the clamping oil cylinder 4 rotates as a whole, thereby driving the pull rod 7 and the clamp head assembly, thereby realizing the transmission process of the clamp head assembly rotating;

[0062] The outer shells on both sides of the worm gear box 5 are fixedly connected to the hollow shaft 2 and the clamping cylinder 4 respectively, so that the worm gear box 5 and the clamping cylinder 4 are fixed in the axial direction.

[0063] Specifically, Figure 2~3 As shown, when the tie rod 7 and the cylinder rod of the clamping cylinder 4 are connected, the other end of the tie rod 7 and the cylinder rod of the clamping cylinder 4 extend into the involute spline 3 from both sides respectively, the second external tooth pattern 71 of the other end of the tie rod 7 meshes with the internal tooth pattern of the involute spline 3, and the first external tooth pattern 41 of the cylinder rod of the clamping cylinder 4 meshes with the internal tooth pattern of the involute spline 3; at the same time, the first shaft shoulder 44 contacts one side of the involute spline 3, and the second shaft shoulder 74 contacts the other side of the involute spline 3;

[0064] The cylinder rod and the pull rod 7 of the clamping cylinder 4 are threadedly connected with the involute spline 3 via the positioning bolt 8 in the vertical direction, so that the positions between the cylinder rod, the pull rod 7 and the involute spline 3 are limited, and the structure is more stable.

[0065] The worm gear box 5 is sleeved on the clamping cylinder 4, and the inner spline of the inner wall of the worm wheel 52 is meshed with the outer spline 6 of the outer wall of the clamping cylinder 4 to form a spline connection, thereby completing the torque transmission between the worm gear box 5 and the clamping cylinder 4. The outer shells on both sides of the worm gear box 5 are respectively fixedly connected to the hollow shaft 2 and the clamping cylinder 4 to form an axial fixation of the worm gear box 5 and the clamping cylinder 4.

[0066] During operation, the driving motor provides rotational power to the worm 51 , and the worm 51 drives the worm wheel 52 to rotate, and the clamping cylinder 4 rotates as a whole, and then drives the pull rod 7 and the clamp head assembly, thereby realizing the transmission process of the clamp head assembly rotating.

[0067] Second embodiment:

[0068] like Figure 1 and 4As shown in Figure 7, an improved transmission device for rotating the clamp head of a forging loading and unloading machine includes a frame 1, a hollow shaft 2, a pull rod 7, a clamping cylinder 4, a worm gear box 5, a clamp head assembly, an involute spline 3 and a positioning bolt 8. The hollow shaft 2 is arranged in the frame 1, and the two are fixedly connected; one end of the pull rod 7 passes through the hollow shaft 2 and is connected to the clamp head assembly, and the other end of the pull rod 7 is connected to the cylinder rod of the clamping cylinder 4 in the hollow shaft 2 through the involute spline 3;

[0069] The involute spline 3 is provided with an internal tooth pattern, and the end of the cylinder rod of the clamping oil cylinder 4 is provided with a first external tooth pattern 41 and a first shaft shoulder 44, the first shaft shoulder 44 is located inside the first external tooth pattern 41, and the outer diameter of the first shaft shoulder 44 is greater than or equal to the tooth top circle of the first external tooth pattern 41; the other end of the pull rod 7 is provided with a second external tooth pattern 71 and a second shaft shoulder 74, the second shaft shoulder 74 is located inside the second external tooth pattern 71, and the outer diameter of the second shaft shoulder 74 is greater than or equal to the tooth top circle of the second external tooth pattern 71; the first external tooth pattern 41 and the second external tooth pattern 71 are both meshed with the internal tooth pattern; the first shaft shoulder 44 is in contact with one side of the involute spline 3, and the second shaft shoulder 74 is in contact with the other side of the involute spline 3;

[0070] The cylinder rod and the pull rod 7 of the clamping cylinder 4 are threadedly connected with the involute spline 3 via the positioning bolt 8 in the vertical direction;

[0071] The cylinder body of the clamping oil cylinder 4 is cylindrical, and the outer cylinder body wall of the clamping oil cylinder 4 is provided with an external spline 6. The worm gear box 5 is sleeved on the clamping oil cylinder 4. The worm gear box 5 includes a worm wheel 52 and a worm 51 that are meshed with each other and a driving motor of the worm 51. The inner wall of the worm wheel 52 is provided with an internal spline that matches the external spline 6 to form a spline connection, thereby completing the torque transmission between the worm wheel 52 and the clamping oil cylinder 4. The driving motor provides rotational power to the worm 51, and the rotation of the worm 51 drives the worm wheel 52 to rotate, and the clamping oil cylinder 4 rotates as a whole, thereby driving the pull rod 7 and the clamp head assembly, thereby realizing the transmission process of the clamp head assembly rotating;

[0072] The outer shells on both sides of the worm gear box 5 are fixedly connected to the hollow shaft 2 and the clamping cylinder 4 respectively, so that the worm gear box 5 and the clamping cylinder 4 are fixed in the axial direction.

[0073] The inner tooth patterns are respectively the first inner tooth pattern 31 and the second inner tooth pattern 32; the first inner tooth pattern 31 and the second inner tooth pattern 32 are respectively arranged at two ends of the inner wall of the involute spline, and an inner protruding ring 33 is arranged between the first inner tooth pattern 31 and the second inner tooth pattern 32, and the inner diameter of the inner protruding ring 33 is less than or equal to the minimum tooth top circle diameter of the first inner tooth pattern 31 and the second inner tooth pattern 32.

[0074] like Figure 5As shown, the end of the cylinder rod of the clamping cylinder 4 is also provided with a first lap tube 42, the first lap tube 42 is located outside the first external tooth pattern 41, the inner wall of the first lap tube 42 is provided with an inward protruding block 45, the outer wall diameter of the first lap tube 42 matches the inner diameter of the inner protruding ring 33 of the involute spline, so that the first lap tube 42 can be inserted into the inner protruding ring 33, and the outer wall of the first lap tube 42 is in close contact with the inner wall of the inner protruding ring 33; the first external tooth pattern 41 is meshed with the second internal tooth pattern 32, and the side surface of the first external tooth pattern 41 is in contact with the side wall of the inner protruding ring 33; the outer diameter of the first shaft shoulder 44 is larger than the tooth top circle diameter of the first external tooth pattern 41, and the side surface of the first shaft shoulder 44 is in contact with one side of the involute spline 3;

[0075] A second lap tube 72 is also provided at the end of the other end of the pull rod 7. The second lap tube 72 is located on the outside of the second external tooth pattern 71. The outer diameter of the second lap tube 72 matches the inner diameter of the first lap tube 42. The outer wall of the second lap tube 72 is provided with a groove 75 that matches the protruding block 45. The second lap tube 72 is inserted into the first lap tube 42, and the two are in close contact; the second external tooth pattern 71 is meshed with the first internal tooth pattern 31, and the side surface of the second external tooth pattern 71 contacts the other side wall of the inner protruding ring 33; the outer diameter of the second shaft shoulder 74 is larger than the tooth top circle diameter of the second external tooth pattern 71, and the side surface of the second shaft shoulder 74 contacts the other side of the involute spline 3; the other end of the pull rod 7 and the cylinder rod of the clamping cylinder 4 are respectively inserted into the involute spline 3 from both ends, the second lap tube 72 is inserted into the first lap tube 42, and the protruding block 45 is inserted into the groove 75.

[0076] like Figure 7 As shown, a longitudinal countersunk cylindrical hole 34 is provided in the middle position of the involute spline 3; a longitudinal first threaded hole 43 is provided on the first lap joint tube 42; a second threaded hole 73 matching with the first threaded hole 43 is provided on the second lap joint tube 72; the positioning bolt 8 passes through the countersunk cylindrical hole 34, the first threaded hole 43 and the second threaded hole 73 in sequence to form a threaded connection, thereby realizing axial fixation of the involute spline 3, the pull rod 7 and the clamping cylinder 4, forming a stable connection structure, and enhancing the stability of the overall device.

[0077] Specifically, when connecting the pull rod 7 and the cylinder rod of the clamping cylinder 4, first extend the cylinder rod of the clamping cylinder 4 from the side of the second internal tooth pattern 32 of the involute spline 3 into the involute spline 3, and the first lap tube 42 of the cylinder rod extends into the inner protruding ring 33, and the side wall of the first external tooth pattern 41 contacts one side of the inner protruding ring 33, and the first external tooth pattern 41 is meshed with the second internal tooth pattern 43, and the first threaded hole 43 is aligned with the countersunk cylindrical hole 34;

[0078] Then, the pull rod 7 is extended into the involute spline 3 from one side of the first internal tooth pattern 31 of the involute spline 3, the second lap tube 72 of the pull rod 7 is extended into the inner protruding ring 33, the side wall of the second external tooth pattern 71 contacts the other side of the inner protruding ring 33, and while the second external tooth pattern 71 is meshed with the first internal tooth pattern 31, the second lap tube 72 is extended into the first lap tube 42, the protruding block 45 is inserted into the groove 75, and the second threaded hole 73 is aligned with the first threaded hole 43;

[0079] Then the positioning bolt 8 is screwed into the countersunk cylindrical hole 34, the first threaded hole 43 and the second threaded hole 73 in sequence, thereby forming a threaded connection between the involute spline 3, the cylinder rod and the pull rod 7 in the vertical direction, and limiting the positions of the three in the axial direction, such as Figure 6 shown.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An improved transmission device for rotating the jaws of a forging loading and unloading machine, comprising a frame, a hollow shaft, a pull rod, a clamping oil cylinder, a worm gear box, and a jaw assembly, wherein the hollow shaft is arranged in the frame and the two are fixedly connected; the worm gear box comprises mutually meshing worm gears and a driving motor of the worm gear; one end of the pull rod passes through the hollow shaft and is connected to the jaw assembly, characterized in that: It also includes an involute spline and a positioning bolt, the other end of the pull rod is connected to the cylinder rod of the clamping cylinder through an involute spline in the hollow shaft; the involute spline is provided with an internal tooth pattern, and the end of the cylinder rod of the clamping cylinder is provided with a first external tooth pattern and a first shoulder, the first shoulder is located on the inner side of the first external tooth pattern, and the outer diameter of the first shoulder is greater than or equal to the tooth top circle of the first external tooth pattern; one end of the pull rod is provided with a second external tooth pattern and a second shoulder, the second shoulder is located on the inner side of the second external tooth pattern, and the outer diameter of the second shoulder is greater than or equal to the tooth top circle of the second external tooth pattern; the An external tooth pattern and a second external tooth pattern are both meshed with the internal tooth pattern; the first shoulder and the second shoulder are in contact with the two sides of the involute spline respectively; the cylinder rod and the pull rod of the clamping cylinder are threadedly connected with the involute spline in the vertical direction through positioning bolts; the cylinder body of the clamping cylinder is cylindrical, and the outer wall of the cylinder body of the clamping cylinder is provided with an external spline, the worm gear box is sleeved on the clamping cylinder, and the inner wall of the worm wheel is provided with an internal spline that matches the external spline to form a spline connection; the outer shells on both sides of the worm gear box are fixedly connected to the hollow shaft and the clamping cylinder respectively.

2. The improved transmission device for rotating the jaws of a forging loading and unloading machine according to claim 1 is characterized in that: The two sides of the worm gear box housing are respectively connected with the hollow shaft and the clamping cylinder through flange covers.

3. The improved transmission device for rotating the jaws of a forging loading and unloading machine according to claim 1 is characterized in that: The internal tooth patterns are respectively the first internal tooth pattern and the second internal tooth pattern; the first internal tooth pattern and the second internal tooth pattern are respectively arranged at two ends of the inner wall of the involute spline; an inner protruding ring is arranged between the first internal tooth pattern and the second internal tooth pattern, and the inner diameter of the inner protruding ring is less than or equal to the minimum tooth top circle diameter of the first internal tooth pattern and the second internal tooth pattern.

4. The improved transmission device for rotating the jaws of a forging loading and unloading machine according to claim 3 is characterized in that: The end of the cylinder rod of the clamping oil cylinder is also provided with a first lap joint tube, which is located outside the first external tooth pattern, and the outer wall diameter of the first lap joint tube matches the inner diameter of the inner protruding ring of the involute spline; the first external tooth pattern is meshed with the second internal tooth pattern, and the side surface of the first external tooth pattern contacts the side wall of the inner protruding ring; the outer diameter of the first shaft shoulder is greater than the tooth top circle diameter of the first external tooth pattern, and the side surface of the first shaft shoulder contacts one side of the involute spline; A second lap tube is also provided at the end of the other end of the pull rod. The second lap tube is located outside the second external tooth pattern. The outer diameter of the second lap tube matches the inner diameter of the first lap tube. The second lap tube is inserted into the first lap tube, and the two are in close contact. The second external tooth pattern is meshed with the first internal tooth pattern, and the side surface of the second external tooth pattern contacts the other side wall of the inner protruding ring. The outer diameter of the second shaft shoulder is larger than the tooth top circle diameter of the second external tooth pattern, and the side surface of the second shaft shoulder contacts the other side of the involute spline.

5. The improved transmission device for rotating the jaws of a forging loading and unloading machine according to claim 4 is characterized in that: The inner wall of the first lap joint tube is provided with an inwardly protruding block, and the outer wall of the second lap joint tube is provided with a groove matched with the protruding block. The first lap joint tube and the second lap joint tube are key-connected through the protruding block and the groove.

6. The improved transmission device for rotating the jaws of a forging loading and unloading machine according to claim 4 is characterized in that: It also includes a positioning bolt. A longitudinal countersunk cylindrical hole is provided in the middle position of the involute spline; a longitudinal first threaded hole is provided on the first lap joint tube; a second threaded hole matching the first threaded hole is provided on the second lap joint tube; the positioning bolt passes through the countersunk cylindrical hole, the first threaded hole and the second threaded hole in sequence to form a threaded connection.

7. The improved transmission device for rotating the jaws of a forging loading and unloading machine according to claim 4 is characterized in that: The outer diameters of the first shoulder and the second shoulder are both smaller than the outer diameter of the involute spline.

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