Claw pulling mechanism of gear hobbing machine and assembly assistive device of claw pulling mechanism

Abstract

The utility model belongs to the technical field of gear machining equipment, and particularly relates to a claw pulling mechanism of a gear hobbing machine, which comprises a flange plate with a through hole in the middle, a positioning sleeve is arranged in the through hole, a pulling claw and a control mechanism for driving the pulling claw to move are arranged in the positioning sleeve, and the control mechanism comprises a connecting sleeve and a pulling shaft. A pull claw is arranged at one end of the pull shaft, the other end of the pull shaft is arranged in the connecting sleeve, the connecting sleeve is of a cylinder structure, a first connecting hole is formed in one end face of the connecting sleeve, a second connecting hole is formed in the other end face of the connecting sleeve, one end of the pull shaft is arranged in the first connecting hole, an oil cylinder pull rod is arranged in the second connecting hole, and a clamping groove is formed in the side wall of the other end of the pull shaft. The pull claws are clamped in the clamping grooves, and annular springs are embedded in the outer side walls of the side walls of the pull claws. The moving stability of the control mechanism is improved through the positioning sleeve, and the connecting sleeve is used for connecting the pull shaft and the oil cylinder pull rod so that the oil cylinder pull rod can drive the pull claw to move.

Description

Technical Field

[0001] This utility model relates to the field of gear processing equipment technology, and in particular to a puller mechanism for a gear hobbing machine and an assembly tool for the puller mechanism. Background Technology

[0002] Gear hobbing machines are the most widely used type of gear processing machine tool. They are used to cut spur gears, helical gears, and other gears with teeth on the outer side. During processing, the stability of the workpiece is directly affected by the quality of the gear hobbing process. Currently, the workpiece is mainly fixed by pressing a clamping block onto it. The clamping block has a connecting shaft in the middle. The connecting shaft is tightened by a pull claw mechanism, which in turn tightens the clamping block, thus fixing the workpiece onto the gear hobbing machine.

[0003] Currently, the claw mechanism used in gear hobbing machines is directly placed into the flange, resulting in a large overall height of the flange. This makes flange processing very difficult and results in low processing accuracy. Consequently, the gap between the control mechanism and the flange is large, making it impossible for the claw to firmly tighten the clamping block. This leads to the workpiece not being securely fixed, ultimately affecting the quality of the gears processed by the gear hobbing machine.

[0004] To address the aforementioned problems, this utility model document proposes a puller mechanism for a gear hobbing machine. Utility Model Content

[0005] This utility model provides a claw mechanism for a gear hobbing machine, which reduces the processing difficulty of the flange, improves the structural stability of the control structure installed in the flange, improves the stability of the claw in fixing the workpiece to be processed, and ensures product quality.

[0006] This utility model provides the following technical solution:

[0007] A pull claw mechanism for a gear hobbing machine includes a flange with a through hole in the middle. A positioning sleeve is provided in the through hole, and a pull claw and a control mechanism for moving the pull claw are provided in the positioning sleeve. The control mechanism includes a connecting sleeve and a pull shaft. One end of the pull shaft is provided with the pull claw, and the other end is provided in the connecting sleeve. The connecting sleeve is a cylindrical structure with a first connecting hole on one end face and a second connecting hole on the other end face. One end of the pull shaft is provided in the first connecting hole, and a hydraulic cylinder pull rod is provided in the second connecting hole. A groove is opened on the side wall of the other end of the pull shaft, and the pull claw is engaged in the groove. A ring spring is embedded in the outer side wall of the pull claw. A plurality of directional holes are evenly provided on the top surface of the flange. A third connecting hole is opened on the end face of the pull shaft connected to the pull claw along the length direction of the pull shaft.

[0008] Furthermore, the flange sidewall is provided with a threaded positioning hole, the threaded positioning hole is provided with a positioning bolt, the positioning sleeve sidewall is provided with a directional groove corresponding to the position of the positioning bolt, and one end of the positioning bolt is provided in the directional groove.

[0009] Furthermore, the outer side wall of the connecting sleeve with the first connecting hole has a guide groove along the length of the connecting sleeve, and the side wall of the positioning sleeve is provided with a guide bolt, one end of which is located in the guide groove.

[0010] Furthermore, the outer side wall of the end of the connecting sleeve with the second connecting hole is provided with a locking hole, and a locking bolt is provided in the locking hole, the end of the locking bolt abutting against the cylinder pull rod.

[0011] Furthermore, a connecting bolt is provided in the third connecting hole, and a threaded connecting hole is provided on the bottom surface of the first connecting hole. The connecting bolt and the threaded connecting hole cooperate to connect the pull shaft to the connecting sleeve.

[0012] Furthermore, the cylinder tie rod is composed of a first tie rod unit and a second tie rod unit spliced ​​together. One end of the first tie rod unit is provided with a first connecting block that mates with the second connecting hole, and the other end is provided with a connecting groove. One end of the second tie rod unit is provided with a second connecting block that mates with the connecting groove, and the other end is provided with a third connecting block that connects to an external power mechanism.

[0013] Furthermore, the sidewall of the connecting groove is provided with fastening screws that cooperate with the second connecting block.

[0014] An assembly fixture for a puller mechanism of a gear hobbing machine includes a height equalizer, a limiting protrusion at the center of the bottom surface of the height equalizer, a mounting hole in the center of the height equalizer, a mounting bolt in the mounting hole, the mounting bolt being threadedly connected to a third connecting hole, and a clearance groove at the bottom surface of the height equalizer.

[0015] Furthermore, the top surface of the contour block is provided with a positioning plate, one end of which is provided with a fourth connecting hole and the other end with a directional groove. The top surface of the contour block is provided with a threaded hole. The positioning plate is fixed to the contour block by bolts passing through the fourth connecting hole and engaging with the threaded hole. A directional bolt is set in the directional groove, and one end of the directional bolt is threaded into the directional hole on the top surface of the flange.

[0016] In this invention, a positioning sleeve is provided in the through hole to improve the stability of the movement of the control mechanism. The connecting sleeve is used to connect the pull shaft and the hydraulic cylinder rod, so that the hydraulic cylinder rod can drive the pull claw to move. The directional hole on the top surface of the flange is used to install the assembly tool. The assembly tool is connected to the pull shaft to prevent the pull shaft from falling out of the flange when the gear hobbing machine is not in use. Attached Figure Description

[0017] Figure 1 A cross-sectional view of the puller mechanism of a gear hobbing machine when fixing the workpiece to be processed, as provided in an embodiment of this utility model.

[0018] Figure 2 This is a cross-sectional structural diagram of the claw mechanism of a gear hobbing machine during the installation and assembly of auxiliary fixtures, as provided in an embodiment of this utility model.

[0019] Figure label:

[0020] 1. Flange; 101. Through hole; 102. Threaded locating hole; 103. Locating bolt; 104. Orientation hole; 2. Locating sleeve; 201. Guide bolt; 3. Connecting sleeve; 301. Guide groove; 302. First connecting hole; 303. Second connecting hole; 304. Locking hole; 305. Locking bolt; 4. Pull shaft; 401. Third connecting hole; 5. Pull claw; 6. Ring spring; 7. Hydraulic cylinder pull rod; 701. 70101, First connecting block; 70102, Connecting groove; 70103, Fastening screw; 702, Second connecting block; 70201, Second connecting block; 70202, Third connecting block; 8, Equal height block; 801, Mounting hole; 802, Mounting bolt; 803, Clearance groove; 804, Threaded hole; 9, Positioning plate; 901, Fourth connecting hole; 902, Orientation groove; 903, Orientation bolt. Detailed Implementation

[0021] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0022] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0023] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0024] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0025] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0026] Example 1:

[0027] Reference Figure 1 As shown, a claw 5 mechanism for a gear hobbing machine includes a flange 1 with a through hole 101 in the middle. A positioning sleeve 2 is provided in the through hole 101. A claw 5 and a control mechanism for moving the claw 5 are provided in the positioning sleeve 2. The control mechanism includes a connecting sleeve 3 and a pull shaft 4. One end of the pull shaft 4 is provided with the claw 5, and the other end is provided in the connecting sleeve 3. The connecting sleeve 3 is a cylindrical structure with a first connecting hole 302 on one end face and a second connecting hole 303 on the other end face. One end of the pull shaft 4 is provided in the first connecting hole 302, and a hydraulic cylinder pull rod 7 is provided in the second connecting hole 303. A slot is opened on the side wall of the other end of the pull shaft 4, and the claw 5 is locked in the slot. A ring spring 6 is embedded in the outer side wall of the claw 5. A plurality of directional holes 104 are evenly provided on the top surface of the flange 1.

[0028] The positioning sleeve 2 is set in the through hole 101 to facilitate the installation of the anti-rotation structure and prevent the control structure and the pull claw 5 from rotating, which would affect the fixing accuracy of the pull claw 5 on the workpiece to be processed. The pull claw 5 is fixedly installed at one end of the pull shaft 4, while the other end of the pull shaft 4 is fixed in the connecting sleeve 3. The connecting sleeve 3 connects the pull shaft 4 and the hydraulic cylinder rod 7, so that the hydraulic cylinder rod 7 can control the pull shaft 4 to move up and down in the positioning sleeve 2, thereby controlling the pull claw 5 to move up and down. When the pull claw 5 moves upward, the pull claw 5 will open under the elastic force of the ring spring 6, which makes it easy to tighten with the ball head of the ball pull rod that passes through the workpiece to be processed, thereby tightening the workpiece to be processed on the flange 1.

[0029] The directional hole 104 on the flange 1 is used to install and fix the assembly fixture. When the gear hobbing machine is not in use, it pulls the pull shaft 4 to prevent the pull claw 5 from falling out of the flange 1, which would affect the positional accuracy of the pull claw 5 and thus affect the stability of the positioning of the workpiece to be processed during subsequent use.

[0030] The flange 1 has a threaded positioning hole 102 on its side wall, and a positioning bolt 103 is provided in the threaded positioning hole 102. The positioning sleeve 2 has a directional groove 902 on its side wall corresponding to the position of the positioning bolt 103, and one end of the positioning bolt 103 is located in the directional groove 902.

[0031] The positioning sleeve 2 is locked by the positioning bolt 103 in the threaded positioning hole 102 to prevent the positioning sleeve 2 from rotating in the through hole 101, and at the same time, the position of the positioning sleeve 2 can be fixed.

[0032] The outer side wall of the connecting sleeve 3 with the first connecting hole 302 has a guide groove 301 along the length of the connecting sleeve 3. The side wall of the positioning sleeve 2 is provided with a guide bolt 201, and one end of the guide bolt 201 is located in the guide groove 301.

[0033] The guide groove 301 slides along the guide bolt 201, which stabilizes the direction of the up and down movement of the connecting sleeve 3, prevents the connecting sleeve 3 from rotating during the movement, and further improves the stability of the pull claw 5 in fixing the workpiece to be processed.

[0034] The outer side wall of the connecting sleeve 3 with the second connecting hole 303 is provided with a locking hole 304, and a locking bolt 305 is provided in the locking hole 304. The end of the locking bolt 305 abuts against the oil cylinder tie rod 7.

[0035] The cylinder rod 7 is locked and fixed by the locking bolt 305 in the locking hole 304 on the side wall of the connecting sleeve 3, which improves the stability of the connection structure between the cylinder rod 7 and the connecting sleeve 3 and ensures that the cylinder rod 7 can drive the connecting sleeve 3 to move, thereby driving the pull claw 5 to move.

[0036] A third connecting hole 401 is opened on the end face of the connecting claw 5 at one end of the pull shaft 4 along the length direction of the pull shaft 4. A connecting bolt is provided in the third connecting hole 401. A threaded connecting hole is provided on the bottom surface of the first connecting hole 302. The connecting bolt and the threaded connecting hole cooperate to connect the pull shaft 4 to the connecting sleeve 3.

[0037] Tightening the connecting bolts into the threaded connection holes will lock the pull shaft 4 and the connecting sleeve 3 together, thus improving the stability of the connection structure between the pull shaft 4 and the connecting sleeve 3.

[0038] The hydraulic cylinder tie rod 7 is composed of a first tie rod unit 701 and a second tie rod unit 702. One end of the first tie rod unit 701 is provided with a first connecting block 70101 that mates with the second connecting hole 303, and the other end is provided with a connecting groove 70102. One end of the second tie rod unit 702 is provided with a second connecting block 70201 that mates with the connecting groove 70102, and the other end is provided with a third connecting block 70202 that connects to an external power mechanism.

[0039] The hydraulic cylinder tie rod 7 is designed in sections, namely the first tie rod unit 701 and the second tie rod unit 702, which reduces the manufacturing difficulty and processing cost of the hydraulic cylinder tie rod 7. At the same time, the section design can also meet different usage requirements.

[0040] The side wall of the connecting groove 70102 is provided with a fastening screw 70103 that cooperates with the second connecting block 70201.

[0041] The second connecting block 70201 is locked and fixed in the connecting groove 70102 by fastening screw 70103, thereby connecting the first tie rod unit 701 and the second tie rod unit 702, improving the stability of the connection structure, preventing the first tie rod unit 701 and the second tie rod unit 702 from separating during use, ensuring the normal use of the hydraulic cylinder tie rod 7, and thus ensuring that the hydraulic cylinder tie rod 7 can be driven.

[0042] In use, a ball joint rod is installed through the middle of the workpiece to be processed. The workpiece is placed on the flange 1. The hydraulic cylinder rod 7 is connected to the hydraulic cylinder of the gear hobbing machine. The hydraulic cylinder drives the hydraulic cylinder rod 7 to move upward. The hydraulic cylinder rod 7 pushes the pull shaft 4 to move upward, which in turn pushes the pull claw 5 to move upward. As the pull claw 5 moves upward, it opens under the elastic force of the ring spring 6, wrapping around the end of the ball joint rod. Then, the hydraulic cylinder pulls the hydraulic cylinder rod 7 downward, which in turn drives the pull claw 5 to move downward. As the pull claw 5 moves downward, it retracts, pulling the end of the ball joint rod, thereby tightening the ball joint rod and thus tightening and fixing the workpiece to be processed on the flange 1.

[0043] During the up-and-down movement of the connecting sleeve 3, the guide groove 301 moves along the wire bolt, effectively preventing the connecting sleeve 3 from rotating, improving the tightening accuracy of the pull claw 5 on the workpiece, and thus improving the processing accuracy of the workpiece. At the same time, the length of the guide groove 301 can also limit the up-and-down movement distance of the connecting sleeve 3, thereby limiting the movement distance of the pull claw 5.

[0044] Example 2:

[0045] Reference Figure 2 As shown, an assembly tool for the puller 5 mechanism of a gear hobbing machine includes a height block 8, a limiting protrusion in the middle of the bottom surface of the height block 8, an installation hole 801 in the middle of the height block 8, an installation bolt 802 in the installation hole 801, the installation bolt 802 being threadedly connected to a third connecting hole 401, and a clearance groove 803 in the bottom surface of the height block 8.

[0046] When the gear hobbing machine is not in use, no workpiece is placed on top of the flange 1. At this time, the pull claw 5, connecting sleeve 3, pull shaft 4, and hydraulic cylinder rod 7 inside the positioning sleeve 2 will slide down, which will affect the positioning accuracy of the pull claw 5. The position of the pull claw 5 in fixing the workpiece inside the positioning sleeve 2 is determined according to the different thicknesses of the workpiece. Different types of workpieces need to be adjusted separately. If the same workpiece is being processed, if the pull claw 5 falls, the accuracy needs to be adjusted repeatedly, which directly affects the work efficiency. Therefore, when the gear hobbing machine is not in use, the equalizing block 8 is placed in the through hole 101 on the flange 1. The mounting bolt 802 in the middle mounting hole 801 is threaded to the third connecting hole 401 at the top of the pull shaft 4, thereby holding the pull shaft 4 and preventing it from sliding down.

[0047] The clearance groove 803 is used to make way for the top of the pull claw 5, so as to prevent the top of the pull claw 5 from colliding with the equal height block 8, which would affect the positioning accuracy and structural stability of the pull claw 5.

[0048] The top surface of the contour block 8 is provided with a positioning plate 9. One end of the positioning plate 9 is provided with a fourth connecting hole 901, and the other end is provided with a directional groove 902. The top surface of the contour block 8 is provided with a threaded hole 804. The positioning plate 9 is fixed on the contour block 8 by bolts passing through the fourth connecting hole 901 and engaging with the threaded hole 804. A directional bolt 903 is set in the directional groove 902. One end of the directional bolt 903 is threadedly connected to the directional hole 104 on the top surface of the flange 1.

[0049] After the directional bolt 903 passes through the directional groove 902, it is bolted into the directional hole 104, locking and fixing the positioning plate 9, and then locking and fixing the equalizing block 8 on the flange 1 to position the equalizing block 8 and prevent the position of the equalizing block 8 from shifting, thereby ensuring that the position of the pull shaft 4 will not change and ensuring the positioning accuracy of the pull claw 5.

[0050] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A puller mechanism for a gear hobbing machine, characterized in that, The flange includes a central through-hole. A positioning sleeve is provided inside the through-hole. A pull claw and a control mechanism for moving the pull claw are provided inside the positioning sleeve. The control mechanism includes a connecting sleeve and a pull shaft. One end of the pull shaft is provided with a pull claw, and the other end is located inside the connecting sleeve. The connecting sleeve is a cylindrical structure with a first connecting hole on one end face and a second connecting hole on the other end face. One end of the pull shaft is located inside the first connecting hole, and a hydraulic cylinder pull rod is provided inside the second connecting hole. A groove is opened on the side wall of the other end of the pull shaft, and the pull claw is engaged in the groove. A ring spring is embedded on the outer side wall of the pull claw. Multiple directional holes are evenly provided on the top surface of the flange. A third connecting hole is opened on the end face of the pull shaft connected to the pull claw along the length direction of the pull shaft.

2. The puller mechanism of a gear hobbing machine according to claim 1, characterized in that, The flange sidewall is provided with a threaded positioning hole, and a positioning bolt is provided in the threaded positioning hole. The positioning sleeve sidewall is provided with a directional groove corresponding to the position of the positioning bolt, and one end of the positioning bolt is provided in the directional groove.

3. The puller mechanism of a gear hobbing machine according to claim 2, characterized in that, The outer side wall of the connecting sleeve with the first connecting hole has a guide groove along the length of the connecting sleeve, and the side wall of the positioning sleeve is provided with a guide bolt, one end of which is located in the guide groove.

4. The puller mechanism of a gear hobbing machine according to claim 3, characterized in that, The outer side wall of the connecting sleeve with the second connecting hole is provided with a locking hole, and a locking bolt is provided in the locking hole. The end of the locking bolt abuts against the cylinder pull rod.

5. The puller mechanism of a gear hobbing machine according to claim 1, characterized in that, The third connecting hole is provided with a connecting bolt, and the bottom surface of the first connecting hole is provided with a threaded connecting hole. The connecting bolt and the threaded connecting hole cooperate to connect the pull shaft and the connecting sleeve.

6. The puller mechanism of a gear hobbing machine according to claim 1, characterized in that, The hydraulic cylinder tie rod is composed of a first tie rod unit and a second tie rod unit. One end of the first tie rod unit is provided with a first connecting block that mates with the second connecting hole, and the other end is provided with a connecting groove. One end of the second tie rod unit is provided with a second connecting block that mates with the connecting groove, and the other end is provided with a third connecting block that connects to an external power mechanism.

7. The puller mechanism of a gear hobbing machine according to claim 6, characterized in that, The sidewall of the connecting groove is provided with fastening screws that cooperate with the second connecting block.

8. An assembly fixture for the puller mechanism of a gear hobbing machine as described in any one of claims 1-7, characterized in that, The device includes a contour block, a limiting protrusion in the middle of the bottom surface of the contour block, an installation hole in the middle of the contour block, an installation bolt in the installation hole, the installation bolt being threadedly connected to a third connecting hole, and a clearance groove in the bottom surface of the contour block.

9. The assembly fixture for the puller mechanism of a gear hobbing machine according to claim 8, characterized in that, The top surface of the contour block is provided with a positioning plate. One end of the positioning plate is provided with a fourth connecting hole, and the other end is provided with a directional groove. The top surface of the contour block is provided with a threaded hole. The positioning plate is fixed to the contour block by bolts passing through the fourth connecting hole and engaging with the threaded hole. A directional bolt is set in the directional groove. One end of the directional bolt is threaded into the directional hole on the top surface of the flange.

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