Buffering transmission device for transmission shaft of precision forging machine

Abstract

A precision forging machine transmission shaft buffer transmission device comprises a worm gear, a worm, a transmission shaft and a clamping portion, the worm gear is meshed with the worm, the transmission shaft is concentrically connected to one end of the clamping portion, and the precision forging machine transmission shaft buffer transmission device is characterized in that the worm gear can be rotationally sleeved on the surface of the transmission shaft relative to the transmission shaft; the worm gear is provided with a plurality of pin shaft holes evenly distributed in the circumferential direction of the transmission shaft, a pin shaft penetrates through each pin shaft hole, the two ends of each pin shaft extend in the axial direction of the transmission shaft, the two ends of the transmission shaft are each sleeved with a sleeve, and the two sleeves are fixedly connected with the transmission shaft. One end of the pin shaft is fixedly connected to one sleeve, and the other end of the pin shaft is movably connected to the other sleeve in an inserted mode. The worm gear drives the transmission shaft through the pin shaft, when the hammer head of the precision forging machine makes contact with a workpiece, the pin shaft is bent, the end, movably connected with the sleeve in an inserted mode, of the pin shaft retracts, when the hammer head of the precision forging machine leaves the workpiece, the pin shaft rebounds, and therefore buffering transmission is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of forging machine transmission components, and particularly relates to a buffer transmission device for a transmission shaft of a forging machine. Background Technique

[0002] As Figure 2 shown, the existing forging machine includes a worm gear 100, a worm 200, a transmission shaft 300 and a clamping part 400. The worm gear 100 is meshed with the worm 200. The worm gear 100 is sleeved on the transmission shaft 300 and is splined to the transmission shaft 300. The transmission shaft 300 is concentrically connected to one end of the clamping part 400. When forging a workpiece, the workpiece is clamped on the clamping part 400. The worm 200 is rotated by the transmission component. The worm 200 drives the worm gear 100 to rotate. The worm gear 100 drives the transmission shaft 300 and the clamping part 400 to rotate through the spline. When the hammer head of the forging machine contacts the workpiece, the workpiece stops rotating instantaneously when it is clamped by the hammer head, while the transmission shaft 300 splined to the worm gear 100 still rotates under the power provided by the transmission component. Over time, parts such as the contact between the clamping part 400 and the workpiece, the connection between the clamping part 400 and the transmission shaft 300, the spline connection between the transmission shaft 300 and the worm gear 100, and the connection between the worm gear 100 and the worm 200 are prone to damage, thus affecting the normal operation of the forging machine. Content of the Utility Model

[0003] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a buffer transmission device for a transmission shaft of a forging machine.

[0004] To solve the above problems, the utility model adopts the following technical solutions:

[0005] A buffer transmission device for a transmission shaft of a forging machine, including a worm gear, a worm, a transmission shaft and a clamping part. The worm gear is meshed with the worm. The transmission shaft is concentrically connected to one end of the clamping part. It is characterized in that the worm gear is rotatably sleeved on the surface of the transmission shaft relative to the transmission shaft. A plurality of pin shaft holes are formed in the worm gear and are uniformly distributed along the circumferential direction of the transmission shaft and penetrate through the worm gear. A pin shaft penetrates through each pin shaft hole. Both ends of the pin shaft extend along the axial direction of the transmission shaft. A sleeve is sleeved on each end of the transmission shaft. Both sleeves are fixedly connected to the transmission shaft. One end of the pin shaft is fixedly connected to one of the sleeves, and the other end is movably inserted into the other sleeve.

[0006] Preferably, a plurality of jacks corresponding to the positions and quantities of the pin shaft holes are formed in the sleeve movably connected to the pin shaft. One end of the pin shaft is movably inserted into the jacks.

[0007] Preferably, inclined transition surfaces are provided at the hole wall to the hole mouth of the jack and at the hole wall to the hole mouth of the pin shaft hole.

[0008] Preferably, at least one threaded hole perpendicular to the axial direction of the sleeve and penetrating the side wall of the sleeve is provided on the side wall of the sleeve. A blind hole perpendicular to the axial direction of the transmission shaft is provided on the surface of the transmission shaft. A set screw is threadedly connected in the threaded hole. When the set screw rotates in the threaded hole, its end can abut against the blind hole.

[0009] Preferably, one of the sleeves is threadedly connected to the surface of the transmission shaft, and limiting components for restricting the axial movement of the sleeve along the transmission shaft are respectively arranged in front of and behind the sleeve.

[0010] Preferably, the limiting component is a bush, and the bush is sleeved on the surface of the transmission shaft and one end abuts against the side wall of the sleeve.

[0011] Preferably, an annular groove is provided on the surface of the transmission shaft, and the worm gear is connected in the annular groove, and both side walls of the worm gear abut against both side walls of the annular groove respectively.

[0012] Preferably, the pin shaft is made of an elastic alloy material.

[0013] Advantages of the present utility model

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] In the present utility model, the worm gear drives the transmission shaft through the pin shaft. When the hammer head of the precision forging machine contacts the workpiece, the workpiece instantaneously stops rotating when being clamped by the hammer head, and the clamping part and the transmission shaft connected to the workpiece also stop rotating. However, the worm gear continues to rotate under the power provided by the worm and the transmission components. At this time, the pin shaft bends, and the end of the pin shaft that is movably inserted into the sleeve retracts. When the hammer head of the precision forging machine leaves the workpiece, the pin shaft rebounds, thereby realizing buffer transmission and avoiding damage to the transmission components. Description of the drawings

[0016] Figure 1 is a structural schematic diagram and a partial enlarged view of the present utility model;

[0017] Figure 2 is a structural schematic diagram of the background technology. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0019] In the description of the present utility model, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "back end", "both ends", "one end", "the other end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "provided with / sleeved with", "socket connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] Please refer to Figure 1 , the present utility model provides a technical solution: a buffer transmission device for the drive shaft of a precision forging machine, including a worm gear 1, a worm 2, a drive shaft 3 and a clamping part 4. The worm gear 1 is meshed and connected with the worm 2. The drive shaft 3 is concentrically connected to one end of the clamping part 4. It is characterized in that the worm gear 1 is rotatably sleeved on the surface of the drive shaft 3 relative to the drive shaft 3. A plurality of pin holes 5 are formed in the worm gear 1, which are evenly distributed along the circumferential direction of the drive shaft 3 and penetrate through the worm gear 1. A pin 6 passes through each pin hole 5. Both ends of the pin 6 extend along the axial direction of the drive shaft 3. A sleeve 7 is sleeved on each end of the drive shaft 3 respectively. Both sleeves 7 are fixedly connected to the drive shaft 3. One end of the pin 6 is fixedly connected to one of the sleeves 7, and the other end is movably inserted into the other sleeve 7. The worm gear 1 of the present utility model drives the drive shaft 3 through the pin 6. When the hammer head of the precision forging machine contacts the workpiece, the workpiece stops rotating instantaneously when it is clamped by the hammer head, and the clamping part 4 and the drive shaft 3 connected to the workpiece also stop rotating. However, the worm gear 1 continues to rotate under the power provided by the worm 2 and the transmission components. At this time, the pin 6 bends, and the end of the pin 6 movably inserted into the sleeve 7 retracts. When the hammer head of the precision forging machine leaves the workpiece, the pin 6 rebounds, thereby realizing buffer transmission and avoiding damage to the transmission components.

[0022] Further, a plurality of jacks 61 corresponding to the positions and quantities of the pin holes 5 are formed in the sleeve 7 movably connected to the pin 6. One end of the pin 6 is movably inserted into the jacks 61, thereby realizing that one end of the pin 6 is movably inserted into the sleeve 7.

[0023] Furthermore, inclined transition surfaces 62 are provided at the hole wall of the jack 61 from the hole wall to the hole opening and at the hole wall of the pin shaft hole 5 from the hole wall to the hole opening, providing a certain movement space for the pin shaft 6 and preventing the pin shaft 6 from making right-angle contact with the hole opening of the jack 61 and the pin shaft hole 5, which may cause indentation or even fracture on the surface of the pin shaft 6.

[0024] Furthermore, at least one threaded hole 71 perpendicular to the axial direction of the sleeve 7 and penetrating the side wall of the sleeve 7 is provided on the side wall of the sleeve 7. A blind hole 72 perpendicular to the axial direction of the transmission shaft 3 is provided on the surface of the transmission shaft 3. A set screw 73 is threadedly connected in the threaded hole 71. When the set screw 73 rotates in the threaded hole 71, its end can abut against the blind hole 72, so that the sleeve 7 is fixed on the surface of the transmission shaft 3 through the set screw 73. During installation, the sleeve 7 can be sleeved on the transmission shaft 3. After adjusting the position of the pin shaft 6 appropriately, it can be fastened through the set screw 73. This connection method is convenient for installation. Of course, the sleeves 7 at both ends of the transmission shaft 3 can both be fixed on the surface of the transmission shaft 3 through the set screw 73, or only the sleeve 7 at one end can be fixed on the surface of the transmission shaft 3 through the set screw 73, and the other end can be fixed by other connection methods.

[0025] Furthermore, one of the sleeves 7 is threadedly connected to the surface of the transmission shaft 3, and limit components for restricting the axial movement of the sleeve 7 along the transmission shaft 3 are respectively provided in front of and behind the sleeve 7. When only the sleeve 7 at one end of the transmission shaft 3 is fixed on the surface of the transmission shaft 3 through the set screw 73, the sleeve 7 at the other end can be connected to the surface of the transmission shaft 3 by a threaded connection method. Compared with the method of fixing the sleeve 7 through the set screw 73, the sleeve 7 connected by threaded connection is simple to process and convenient to manufacture.

[0026] Furthermore, the limit component is a bushing 8. The bushing 8 is sleeved on the surface of the transmission shaft 3 and one end abuts against the side wall of the sleeve 7, restricting the axial movement of the sleeve 7 along the transmission shaft 3, thereby fixing the sleeve 7 on the surface of the transmission shaft 3.

[0027] Furthermore, an annular groove 31 is provided on the surface of the transmission shaft 3. The worm wheel 1 is connected in the annular groove 31, and both side walls of the worm wheel 1 abut against both side walls of the annular groove 31 respectively, preventing the worm wheel 1 from moving axially along the transmission shaft 3.

[0028] Furthermore, the pin shaft 6 is made of an elastic alloy material, which not only ensures its hardness and non-deformation but also has a certain elasticity.

[0029] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0030] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A buffer transmission device for a transmission shaft of a precision forging machine, comprising a worm wheel (1), a worm (2), a transmission shaft (3) and a clamping portion (4), wherein the worm wheel (1) is meshingly connected to the worm (2), and the transmission shaft (3) is concentrically connected to one end of the clamping portion (4), characterized in that: The worm wheel (1) can be rotatably sleeved on the surface of the transmission shaft (3) relative to the transmission shaft (3); the worm wheel (1) is provided with a plurality of pin holes (5) evenly distributed along the circumferential direction of the transmission shaft (3) and penetrating the worm wheel (1); a pin (6) penetrates each pin hole (5); both ends of the pin (6) extend axially along the transmission shaft (3); a sleeve (7) is sleeved on each end of the transmission shaft (3); both sleeves (7) are fixedly connected to the transmission shaft (3); one end of the pin (6) is fixedly connected to one of the sleeves (7), and the other end is movably plugged into the other sleeve (7).

2. A buffer transmission device for a transmission shaft of a precision forging machine according to claim 1, characterized in that: A plurality of insertion holes (61) corresponding in position and number to the pin shaft hole (5) are formed on a sleeve (7) movably connected to the pin shaft (6), and one end of the pin shaft (6) is movably inserted into the insertion hole (61).

3. A buffer transmission device for a transmission shaft of a precision forging machine according to claim 2, characterized in that: Inclined transition surfaces (62) are provided between the hole wall and the hole opening of the insertion hole (61) and between the hole wall and the hole opening of the pin shaft hole (5).

4. A buffer transmission device for a transmission shaft of a precision forging machine according to claim 1, characterized in that: A threaded hole (71) is provided on the side wall of at least one sleeve (7) and is perpendicular to the axial direction of the sleeve (7) and passes through the side wall of the sleeve (7); a blind hole (72) is provided on the surface of the transmission shaft (3) and is perpendicular to the axial direction of the transmission shaft (3); a set screw (73) is connected to the inner thread of the threaded hole (71); when the set screw (73) rotates in the threaded hole (71), its end can abut against the blind hole (72).

5. A buffer transmission device for a transmission shaft of a precision forging machine according to claim 4, characterized in that: One of the sleeves (7) is threadedly connected to the surface of the transmission shaft (3), and limiting components for limiting the axial movement of the sleeve (7) along the transmission shaft (3) are respectively provided at the front and rear of the sleeve (7).

6. A buffer transmission device for a transmission shaft of a precision forging machine according to claim 5, characterized in that: The limiting component is a shaft sleeve (8), which is sleeved on the surface of the transmission shaft (3) and has one end abutting against the side wall of the sleeve (7).

7. The buffer transmission device for a transmission shaft of a precision forging machine according to claim 1, characterized in that: An annular groove (31) is provided on the surface of the transmission shaft (3), the worm wheel (1) is connected in the annular groove (31), and two side walls of the worm wheel (1) are respectively in contact with two side walls of the annular groove (31).

8. The buffer transmission device for a transmission shaft of a precision forging machine according to claim 1, characterized in that: The pin shaft (6) is made of elastic alloy material.

Images