Positioning clamp for machining output shaft of planetary reducer

Abstract

The utility model discloses a positioning fixture for processing an output shaft of a planetary reducer, which relates to the field of fixtures for processing speed reducers, and is characterized by comprising a positioning base, and the upper end face of the positioning base is provided with an accommodating groove for inserting a planet carrier part of the output shaft; the pressing sleeve is detachably connected to the upper portion of the positioning base through a thread structure, a pressing face used for pressing the planet carrier on the positioning base is arranged on the inner top wall of the pressing sleeve, and a plurality of machining grooves evenly distributed in the circumferential direction are formed in the outer circumferential wall of the lower portion of the pressing sleeve so that a machine tool cutter can machine a gear mounting groove of the planet carrier of the output shaft. The fixture has the advantages of simple and compact structure, convenience and quickness in use and high clamping precision.

Description

Technical Field

[0001] This utility model relates to the field of fixtures for machining speed reducers, and more specifically, it relates to a positioning fixture for machining the output shaft of a planetary speed reducer. Background Technology

[0002] The output shaft is the core transmission component of the planetary gear reducer, such as... Figure 5 The output shaft 6 shown typically includes a shaft section 61 and a planetary carrier 62 integrally formed on the shaft section 61. Multiple circumferentially distributed gear mounting slots 621 need to be machined on the planetary carrier 62 for mounting planetary gear sets. Since planetary reducers have extremely high requirements for transmission accuracy, load-bearing capacity and smooth operation, the machining quality of the gear mounting slots 621 directly affects the performance and life of the reducer.

[0003] In the traditional method, when machining the gear mounting groove 621, a three-jaw chuck is mostly used to clamp the shaft segment 61 of the output shaft 6. This method results in the planetary carrier 62 not having an effective support point. Machining vibration and clamping errors can easily lead to low precision of the gear mounting groove 621. Of course, some special positioning fixtures have also appeared on the market. However, such special positioning fixtures have a relatively complex structure, high production cost, and are cumbersome to operate and have low work efficiency.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a positioning fixture for machining the output shaft of a planetary reducer, which has the advantages of simple and compact structure, convenient and quick use, and high clamping accuracy.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a positioning fixture for machining the output shaft of a planetary reducer, comprising:

[0007] The positioning base has a receiving groove on its upper end face for the planetary carrier portion of the output shaft to be inserted;

[0008] The clamping sleeve is detachably connected to the upper part of the positioning base via a threaded structure. The inner top wall of the clamping sleeve is provided with a clamping surface for pressing the planetary carrier onto the positioning base. The lower outer peripheral wall is provided with multiple circumferentially distributed machining grooves for machine tool tools to machine the gear mounting grooves of the planetary carrier of the output shaft.

[0009] In one embodiment, the center of the receiving groove is provided with a positioning boss that can partially extend into the planetary carrier, the positioning boss defining the receiving groove as an annular groove, and the bottom of the annular groove is provided with an elastic buffer pad.

[0010] In one embodiment, the positioning boss is provided with a plurality of cutting fluid return channels, which extend downward into the positioning base and radially through to the outside of the positioning base.

[0011] In one embodiment, the threaded structure includes an internal thread and an external thread disposed on the outer peripheral wall of the positioning base. The clamping sleeve includes a cylinder and a top cover fixed to one end of the cylinder. The internal thread is disposed on the inner peripheral wall of the cylinder at the end away from the top cover, and the external thread is threadedly connected to the internal thread.

[0012] In one embodiment, a screwing table is fixed on the top cover, and the screwing table is provided with a slot for inserting a handle in the radial direction. A through groove is provided through the top cover and the screwing table for the shaft segment of the output shaft to extend out.

[0013] In one embodiment, the pressing surface is disposed on a pressing ring, which is detachably connected to the bottom of the top cover.

[0014] In one embodiment, the pressing surface is a conical pressing surface, and a wear-resistant layer is provided on the pressing surface.

[0015] In one embodiment, the positioning base is fixed to a mounting plate, which has mounting holes for mounting the mounting plate on a machine tool.

[0016] In summary, this utility model has the following beneficial effects: The planetary carrier is precisely positioned by the receiving groove on the positioning base. Combined with the rapid locking capability of the threaded structure and the clamping force of the clamping surface on the inner top wall of the clamping sleeve, the planetary carrier can be effectively fixed, avoiding machining vibration and clamping errors caused by lack of support when using a traditional three-jaw chuck. This effectively improves the machining accuracy of the gear mounting groove. Simultaneously, the circumferentially distributed machining grooves at the lower part of the clamping sleeve directly provide machining windows for the machine tool, simplifying the machining path. The structural design is simple and reliable, reducing the complex structure and production cost of traditional special fixtures while improving clamping efficiency and ease of operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the positioning fixture for machining the output shaft of a planetary reducer, according to an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the positioning base in the positioning fixture for machining the output shaft of a planetary reducer, according to an embodiment of this application.

[0019] Figure 3 This is a cross-sectional view of a positioning fixture for machining the output shaft of a planetary reducer, according to an embodiment of this application.

[0020] Figure 4 for Figure 3 Enlarged view of part A in the image;

[0021] Figure 5 This is a schematic diagram of the output shaft of a planetary gear reducer.

[0022] In the diagram: 1. Positioning base; 11. External thread; 12. Annular groove; 13. Positioning boss; 131. Cutting fluid return channel; 2. Clamping sleeve; 21. Cylinder; 211. Machining groove; 22. Top cover; 23. Tightening table; 231. Slot; 24. Internal thread; 3. Mounting plate; 4. Clamping ring; 41. Clamping surface; 5. Bolt; 6. Output shaft; 61. Shaft segment; 62. Planetary carrier; 621. Gear mounting groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, an embodiment of this application provides a positioning fixture for machining the output shaft of a planetary reducer, including a positioning base 1. The upper end face of the positioning base 1 has a receiving groove for inserting a portion of the planetary carrier 62 of the output shaft 6, specifically a planetary carrier 62 blank. The inner peripheral wall of the receiving groove is adapted to the outer peripheral wall of the planetary carrier 62. It also includes a clamping sleeve 2, which is detachably connected to the upper part of the positioning base 1 via a threaded structure. The inner top wall of the clamping sleeve 2 has a clamping surface 41 for clamping the planetary carrier 62 onto the positioning base 1. The lower outer peripheral wall has multiple circumferentially distributed machining grooves 211 for machine tool cutting to machine the gear mounting grooves 621 of the planetary carrier 62 of the output shaft 6.

[0025] Specifically, the positioning base 1 is fixed on a mounting plate 3, and the mounting plate 3 is provided with mounting holes for mounting the mounting plate 3 on the machine tool.

[0026] When using the above-mentioned positioning fixture, first insert the planetary carrier 62 part of the output shaft 6 into the receiving groove of the positioning base 1. Radial positioning is achieved through the tight fit between the inner wall of the receiving groove and the outer wall of the planetary carrier 62. At the same time, axial positioning is achieved by the contact between the bottom end face of the planetary carrier 62 and the bottom surface of the receiving groove. Tighten the clamping sleeve 2, so that the clamping surface 41 of its inner top wall is gradually pressed down, so that the planetary carrier 62 is in close contact with the positioning base 1, eliminating the clamping gap, and maintaining a constant clamping force through the self-locking characteristic of the thread. Then, install the mounting plate 3 on the target position of the machine tool. The machine tool tool enters the planetary carrier 62 area through the circumferentially distributed machining grooves 211 of the clamping sleeve 2, and performs milling or gear shaping in sequence to obtain the gear mounting groove 621. It should be noted that in order to avoid the influence of the machining grooves 211 on the machine tool tool, the size of the machining grooves 211 is larger than the size of the target gear mounting groove 621. During the machining process, a cutting fluid nozzle is provided on one side of the machine tool tool. The cutting fluid nozzle sprays cutting fluid toward the machining grooves 211 to cool and lubricate the cutting position.

[0027] In the above method, the planetary carrier 62 is precisely positioned by the receiving groove on the positioning base 1. Combined with the quick locking capability of the threaded structure and the clamping force of the clamping surface 41 set on the inner top wall of the clamping sleeve 2, the planetary carrier 62 can be effectively fixed and the machining vibration and clamping error caused by lack of support when using a traditional three-jaw chuck can be avoided. This effectively improves the machining accuracy of the gear mounting groove 621. At the same time, the machining grooves 211 evenly distributed around the lower part of the clamping sleeve 2 directly provide machining windows for the machine tool, simplifying the machining path. The structural design is simple and reliable, which reduces the complex structure and production cost of traditional special fixtures and improves clamping efficiency and ease of operation.

[0028] In this embodiment, as Figure 2 and Figure 3 As shown, a positioning boss 13, which can partially extend into the planetary carrier 62, is provided at the center of the receiving groove. The positioning boss 13 defines the receiving groove as an annular groove 12. The outer peripheral wall of the positioning boss 13 contacts the inner peripheral wall of the planetary carrier 62, further radially positioning the planetary carrier 62. An elastic buffer pad is provided at the bottom of the annular groove 12. The elastic buffer pad can be a rubber pad or a multi-layer composite material. The multi-layer composite material includes high-damping silicone, porous metal rubber, and oil-resistant fluororubber arranged sequentially from bottom to top. Through the triple action of damping silicone absorbing vibration, metal rubber dissipating energy, and fluororubber resisting oil stains, the amplitude of processing vibration is reduced.

[0029] In this embodiment, the positioning boss 13 is provided with multiple cutting fluid return channels 131. The cutting fluid return channels 131 extend downward into the positioning base 1 and radially through to the outside of the positioning base 1. The cutting fluid can carry some debris out along the cutting fluid return channels 131 to the outside of the positioning base 1. At the same time, the positioning base 1 can be cooled down by the cooling effect of the cutting fluid. The cutting fluid return channels 131 include interconnected longitudinal channels and radial channels. When blockage occurs, a drain rod can be used for quick unblocking. It should be noted that large-volume debris can be discharged from the machining groove 211 during the machining process. If some remains on the positioning boss 13, it can be manually cleaned after machining.

[0030] In this embodiment, the threaded structure includes an internal thread 24 and an external thread 11 disposed on the outer peripheral wall of the positioning base 1. The clamping sleeve 2 includes a cylinder 21 and a top cover 22 fixed to one end of the cylinder 21. The internal thread 24 is disposed on the inner peripheral wall of the cylinder 21 away from the top cover 22. The external thread 11 is threadedly connected to the internal thread 24.

[0031] In this embodiment, a screwing table 23 is fixed on the top cover 22. The screwing table 23 is waist-shaped to facilitate manual pre-tightening. A slot 231 for inserting a handle is provided radially on the screwing table 23. A through groove for the shaft section 61 of the output shaft 6 is provided through the top cover 22 and the screwing table 23. The top cover 22 cooperates with the handle through the radial slot 231 of the screwing table 23. During operation, the handle is inserted and rotated, and the torque is transmitted to the clamping sleeve 2 using the lever principle, so as to quickly tighten or loosen the clamping sleeve 2.

[0032] In this embodiment, as Figure 4 As shown, the pressing surface 41 is set on a pressing ring 4. The pressing ring 4 is detachably connected to the bottom of the top cover 22 by bolts 5. The top cover 22 is provided with a countersunk hole, and the pressing ring 4 is provided with a threaded connection hole. The bolts 5 are connected between the countersunk hole and the threaded connection hole.

[0033] In this embodiment, the clamping surface 41 is a conical clamping surface, and a wear-resistant layer is provided on the clamping surface 41. Specifically, the wear-resistant layer can be a titanium nitride plating layer or a hard alloy coating. The conical clamping surface can better adapt to the shape of the planetary carrier 62, provide uniform clamping force, and can gradually clamp the planetary carrier 62.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A positioning jig for machining an output shaft of a planetary reducer, characterized by: The utility model relates to a positioning base (1) upper end face is provided with the accommodation groove of the planetary carrier part insertion of output shaft, the compression sleeve (2) is detachably connected to the upper portion of positioning base (1) through the screw structure, the inner top wall of compression sleeve (2) is provided with the compression surface (41) for the planetary carrier compression in positioning base (1), and the lower outer peripheral wall is provided with a plurality of circumferentially distributed processing grooves (211) to be machined by machine tool cutter the gear mounting groove of planetary carrier (62) of output shaft. The center of the accommodation groove is provided with a positioning boss (13) that can partially extend into the planetary carrier (62), the positioning boss (13) limits the accommodation groove into an annular groove (12), and the bottom of the annular groove (12) is provided with an elastic buffer pad. A plurality of cutting fluid return channels (131) are arranged on the positioning boss (13), the cutting fluid return channels (131) extend downward into the positioning base (1) and extend radially to the outside of the positioning base (1).

2. The positioning fixture for machining of the output shaft of a planetary reduction machine according to claim 1, characterized in that: The screw structure includes an internal thread (24) and an external thread (11) arranged on the outer peripheral wall of the positioning base (1), the compression sleeve (2) includes a cylinder (21) and a top cover (22) fixed to one end of the cylinder (21), the internal thread (24) is arranged on the inner peripheral wall of the cylinder (21) away from the top cover (22), and the external thread (11) is threadedly connected with the internal thread (24).

3. The positioning fixture for machining of the output shaft of a planetary reduction machine according to claim 2, characterized in that: A screwing table (23) is fixed to the top cover (22), the screwing table (23) is provided with an insertion slot (231) for inserting a handle in the radial direction, and a through slot is provided through the top cover (22) and the screwing table (23) for the shaft segment of the output shaft to extend out.

4. The positioning fixture for machining of the output shaft of a planetary reduction machine according to claim 1, characterized in that: The compression surface (41) is arranged on a compression ring (4), and the compression ring (4) is detachably connected with the bottom of the top cover (22).

5. The planetary gear reducer output shaft machining positioning fixture according to claim 4, characterized in that: The compression surface (41) is a conical compression surface, and the compression surface (41) is provided with a wear-resistant layer.

6. The positioning fixture for machining of the output shaft of a planetary reduction machine according to claim 4, characterized in that: The positioning base (1) is fixed to a mounting disc (3), and the mounting disc (3) is provided with mounting holes for mounting the mounting disc (3) on a machine tool.

7. The planetary gear reducer output shaft machining positioning fixture according to claim 6, characterized in that: ​ 8. The planetary gear reducer output shaft machining positioning fixture according to claim 1, characterized in that: ​

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