Hollow shaft output shaft structure

Abstract

The utility model relates to the technical field of gear output shafts, in particular to a hollow shaft output shaft structure which comprises a flat key hollow shaft connected with a speed reducer working shaft, a center inner hole used for inserting the speed reducer working shaft is formed in the speed reducer working shaft, and a step hole is formed in one end of the flat key hollow shaft. The stepped hole communicates with the center inner hole, an inner hole ring groove is formed in the stepped hole, a baffle is inserted into the stepped hole, and the baffle abuts against the speed reducer working shaft. During installation, the speed reducer is sleeved with the nut and the threaded pull rod, one end of the threaded pull rod is in threaded connection with a central hole of a working shaft of the speed reducer and penetrates through a central threaded hole of the baffle, and the nut is screwed into one end of the threaded pull rod on the outer side of the baffle and is fastened through the nut until the end face of the flat key hollow shaft is attached to the extending end face of the working shaft of the speed reducer. The locking bolt is screwed into the center hole of the working shaft of the speed reducer and presses the end face of the baffle to complete installation, installation and disassembly are easy, and protection to equipment and a bearing is good.

Description

Technical Field

[0001] This utility model relates to the field of gear output shaft technology, and in particular to a hollow shaft output shaft structure. Background Technology

[0002] Gear reducers play a role in matching speeds and transmitting torque between the prime mover and the working shaft. The output shaft structure of general gear reducers commonly includes solid output shafts and hollow output shafts. Among them, the hollow output shaft structure has advantages such as light weight, low cost, compact structure, small installation space, and no need for couplings to connect to the center hole of the working shaft, making it particularly suitable for shaft-mounted connections.

[0003] In the prior art, such as the patent with publication number CN219623098U, a hollow shaft key connection structure and gearbox assembly are disclosed, including an output hollow shaft, a tapered sleeve and a connecting key. The inner circumferential surface of the output hollow shaft is provided with an anti-rotation groove, and the peripheral wall of the tapered sleeve is provided with an anti-rotation hole. The tapered sleeve is inserted into the output hollow shaft, and the connecting key is simultaneously inserted into the anti-rotation groove and the anti-rotation hole, so that the output hollow shaft and the tapered sleeve are relatively fixed in the circumferential direction of the output hollow shaft. The tapered sleeve is used for the insertion of the working machine shaft and for interference fit with the working machine shaft.

[0004] The above structure applies force to the tapered bushing when disassembling and assembling the working machine shaft and the output hollow shaft, but the installation and disassembly of the flat key hollow shaft output shaft structure is more complicated. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a hollow shaft output shaft structure to solve the problem of complex installation and disassembly in the flat key hollow shaft output shaft structure.

[0006] Based on the above objectives, this utility model provides a hollow shaft output shaft structure, including a keyed hollow shaft connected to a reducer working shaft. The reducer working shaft has a central inner hole for insertion. One end of the keyed hollow shaft has a stepped hole that communicates with the central inner hole. The stepped hole has an inner annular groove, and a baffle is inserted into the stepped hole, abutting against the reducer working shaft. The baffle has a central threaded hole, and a locking bolt connects the central threaded hole to the inside of the reducer working shaft. The keyed hollow shaft also has an external shaft segment connected to a gear, located at the center of the keyed hollow shaft.

[0007] Preferably, the outer side of the shaft segment is provided with an outer circular keyway, and the inner side of the central inner hole is provided with an inner hole keyway corresponding to the working shaft of the reducer.

[0008] Preferably, the baffle is a stepped cylinder, and the maximum outer diameter of the baffle matches the maximum inner diameter of the stepped hole.

[0009] Preferably, a locking clip is inserted into the inner annular groove, and the locking clip is engaged with the inner annular groove.

[0010] Preferably, the central screw hole corresponds to the central hole of the reducer working shaft, and the diameter of the central screw hole is larger than the diameter of the central hole of the reducer working shaft.

[0011] Preferably, the reducer working shaft is connected to the keyed hollow shaft by a key, and the diameter of the stepped hole is larger than the diameter of the central inner hole.

[0012] The beneficial effects of this utility model are:

[0013] During installation, the reducer is assembled using a nut and threaded tie rod. One end of the threaded tie rod is screwed into the center hole of the reducer's working shaft and passes through the center threaded hole of the baffle. The nut is screwed into the threaded tie rod end on the outside of the baffle and tightened. By continuously tightening the nut, the end face of the hollow key shaft is fitted with the end face of the reducer's working shaft extension. The locking bolt is then screwed into the center hole of the reducer's working shaft and presses against the end face of the baffle, axially fixing the reducer's working shaft, thus completing the reducer installation operation. To disassemble the reducer, the locking bolt on one side of the baffle is loosened, and the hole clamp and baffle are removed in sequence. The locking bolt is screwed into the center hole of the reducer's working shaft, and then the baffle and hole clamp are installed in sequence. The push-out bolt is screwed into the center threaded hole of the baffle. By continuously tightening the push-out bolt, the hollow key shaft is disassembled from the working shaft extension, thus completing the reducer disassembly operation. Installation and disassembly are simple, and the use of a nut and threaded tie rod to assemble the reducer provides good protection for the equipment and bearings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a side view of the central axis section of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the baffle of this utility model;

[0018] Figure 4 This is a schematic diagram of the installation structure of the present invention and the gear reducer;

[0019] Figure 5 This is a schematic diagram of the disassembly structure of the present invention and the gear reducer.

[0020] The markings in the diagram are as follows: 1. Reducer working shaft; 2. Nut; 3. Flat key hollow shaft; 31. Center inner hole; 32. Stepped hole; 33. Inner hole annular groove; 35. Outer circle keyway; 36. Inner hole keyway; 39. Shaft section; 4. Baffle; 41. Center screw hole; 5. Hole clamp; 6. Flat washer; 7. Threaded tie rod; 8. Press-out bolt; 9. Locking bolt. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a hollow shaft output shaft structure includes a keyed hollow shaft 3 connected to a reducer working shaft 1. The reducer working shaft 1 has a central inner hole 31 for insertion. One end of the keyed hollow shaft 3 has a stepped hole 32, which is connected to the central inner hole 31.

[0023] The stepped hole 32 has an inner annular groove 33, and a baffle 4 is inserted into the stepped hole 32. The baffle 4 abuts against the reducer working shaft 1. The baffle 4 has a central screw hole 41, and a locking bolt 9 is connected between the central screw hole 41 and the reducer working shaft 1. The flat key hollow shaft 3 also has a shaft section 39 connected to the gear on the outside. The shaft section 39 is located at the center of the flat key hollow shaft 3.

[0024] In this embodiment, during installation, the reducer is assembled using a nut 2 and a threaded tie rod 7. One end of the threaded tie rod 7 is threaded to the center hole of the reducer's working shaft 1 and passes through the center threaded hole 41 of the baffle 4. The nut 2 is screwed into one end of the threaded tie rod 7 on the outside of the baffle 4 and tightened. By continuously tightening the nut 2, the end face of the flat key hollow shaft 3 is brought into contact with the extended end face of the reducer's working shaft 1. The locking bolt 9 is screwed into the center hole of the reducer's working shaft 1 and presses against the end face of the baffle 4, thus completing the installation operation of the reducer. When disassembling the reducer, the locking bolt 9 on one side of the baffle 4 is loosened, and the hole clip 5 and the baffle 4 are removed in sequence. The locking bolt 9 is screwed into the center hole of the reducer's working shaft 1, and then the baffle 4 and the hole clip 5 are installed in sequence. The push-out bolt 8 is screwed into the center threaded hole 41 of the baffle 4. By continuously screwing in the push-out bolt 8, the flat key hollow shaft 3 is disengaged from the extended end of the reducer's working shaft 1, thus completing the disassembly operation of the reducer.

[0025] As one implementation method, such as Figure 2 As shown, the outer side of the shaft segment 39 is provided with an outer circular keyway 35, and the inner side of the central inner hole 31 is provided with an inner hole keyway 36 corresponding to the working shaft 1 of the reducer.

[0026] In this embodiment, the flat key hollow shaft 3 is radially supported by tapered roller bearings at both ends and has a cross-positioning structure at both ends. The large gear of the final stage of the reducer is mounted on the shaft section 39 of the flat key hollow shaft 3. The large gear and the flat key hollow shaft 3 transmit torque through a flat key, which is installed in the outer circular keyway 35 of the flat key hollow shaft 3. The flat key hollow shaft 3 transmits the torque and speed of the prime mover to the reducer working shaft 1 through the keyway 36 in the inner hole of the flat key hollow shaft 3 after the reducer reduces and increases the torque. This achieves the transmission of torque and speed.

[0027] As one implementation method, such as Figure 1 , Figure 2 and Figure 3 As shown, the baffle 4 is a stepped cylinder, and the maximum outer diameter of the baffle 4 matches the maximum inner diameter of the stepped hole 32.

[0028] In this embodiment, after the flat key hollow shaft 3 and the reducer working shaft 1 are installed, the protruding part of the baffle 4 fits against the reducer working shaft 1, and the end face of the flat key hollow shaft 3 fits against the shaft extension part of the reducer working shaft 1. During the installation process, the baffle 4 flips and engages with the stepped hole 32 of the flat key hollow shaft 3 before installation, thus protecting the end face of the baffle 4.

[0029] As one implementation method, such as Figure 4 As shown, a clip 5 is inserted into the inner annular groove 33, and the clip 5 is engaged with the inner annular groove 33.

[0030] In this embodiment, after flipping the baffle 4, the baffle 4 is installed into the stepped hole 32 inside the hollow key shaft 3, so that the end face of the baffle 4 fits against the end face of the hollow key shaft 3. Then, the hole clip 5 is installed into the annular groove 33 inside the hollow key shaft 3 to ensure the stability of the reducer during installation.

[0031] As one implementation method, such as Figure 4 and Figure 5 As shown, the central screw hole 41 corresponds to the central hole of the reducer working shaft 1, and the diameter of the central screw hole 41 is larger than the diameter of the central hole of the reducer working shaft 1.

[0032] In this embodiment, one end of the threaded tie rod 7 is first screwed into the center hole of the reducer working shaft 1 and tightened with nut 2. The other end of the threaded tie rod 7 passes through the center threaded hole 41 of the baffle 4 and the inner hole of the clip 5. The flat washer 6 is installed into the threaded tie rod 7 and fits against the end face of the baffle 4. Then, the nut 2 is screwed into the threaded tie rod 7 and the end face of the flat washer 6 is pressed. By continuously tightening the nut 2, the reducer is pulled into the shaft extension of the reducer working shaft 1 until the end face of the flat key hollow shaft 3 fits against the end face of the shaft extension of the reducer working shaft 1, thus raising the speed.

[0033] As one implementation method, such as Figure 1 and Figure 4 As shown, the reducer working shaft 1 and the keyed hollow shaft 3 are connected by a key, and the diameter of the stepped hole 32 is larger than the diameter of the central inner hole 31.

[0034] In this embodiment, the flat key hollow shaft 3 and the reducer working shaft 1 are connected by a flat key, which reduces the weight of the solid output shaft and also reduces the output inertia of the reducer. This not only reduces the cost of finished parts but also improves the dynamic response performance of the reducer output shaft and eliminates the need for a coupling required for connecting the solid output shaft.

[0035] Working principle: During use, when installing the reducer, remove the hole clamp 5 and baffle 4 from the stepped hole 32 inside the hollow key shaft 3. After flipping the baffle 4, insert it into the stepped hole 32 of the hollow key shaft 3, making the end face of the baffle 4 fit against the end face of the hollow key shaft 3. Then, insert the hole clamp 5 into the annular groove 33 inside the hollow key shaft 3. Use the nut 2 and threaded tie rod 7 to assemble the reducer. First, screw one end of the threaded tie rod 7 into the center hole of the reducer's working shaft 1, and then use a screw... Tighten nut 2. The other end of threaded pull rod 7 passes through the center threaded hole 41 of baffle 4 and the inner hole of clip 5. Insert flat washer 6 into threaded pull rod 7 and make it fit against the end face of baffle 4. Then screw nut 2 into threaded pull rod 7 and press flat washer 6 against the end face. By continuously tightening nut 2, pull the reducer into the reducer working shaft 1 extension until the end face of the flat key hollow shaft 3 fits against the end face of the reducer working shaft 1 extension. Stop tightening nut 2, loosen nut 2, and remove nut 2 and flat washer. 6. Replace the retaining clip 5 and baffle 4, unscrew the threaded pull rod 7, screw the locking bolt 9 into the center hole of the reducer working shaft 1 and press the end face of the baffle 4 to axially fix the reducer working shaft 1. This completes the installation and fixing of the reducer. When disassembling the reducer, loosen the locking bolt 9 on the end face of the baffle 4, remove the locking bolt 9, and then remove the retaining clip 5 and baffle 4 in sequence. Screw the locking bolt 9 into the center hole of the reducer working shaft 1 to protect the center hole, and flip the baffle. 4. Then, insert the baffle 4 into the stepped hole 32 of the hollow key shaft 3, so that the end face of the baffle 4 fits against the end face of the hollow key shaft 3. Then, insert the hole clip 5 into the annular groove 33 of the inner hole of the hollow key shaft 3. With the help of the press-out bolt 8, screw the press-out bolt 8 into the center screw hole 41 of the baffle 4 and tighten the locking bolt 9 on the end face of the reducer working shaft 1. By continuously screwing in the press-out bolt 8, until the hollow key shaft 3 is disengaged from the shaft extension of the reducer working shaft 1, the disassembly of the reducer is completed.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0037] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hollow shaft output shaft structure, comprising a keyed hollow shaft (3) connected to a reducer working shaft (1), characterized in that, The hollow key shaft (3) has a central inner hole (31) for insertion into the reducer working shaft (1). One end of the hollow key shaft (3) has a stepped hole (32) connected to the central inner hole (31). The stepped hole (32) has an inner annular groove (33) and a baffle (4) is inserted into the stepped hole (32). The baffle (4) abuts against the reducer working shaft (1). The baffle (4) has a central screw hole (41) and a locking bolt (9) is connected to the reducer working shaft (1). The hollow key shaft (3) also has a shaft segment (39) connected to the gear on the outside. The shaft segment (39) is located at the center of the hollow key shaft (3).

2. The hollow shaft output shaft structure according to claim 1, characterized in that, The outer circular keyway (35) is provided on the outside of the shaft segment (39), and the inner hole keyway (36) corresponding to the working shaft (1) of the reducer is provided inside the central inner hole (31).

3. The hollow shaft output shaft structure according to claim 1, characterized in that, The baffle (4) is a stepped cylinder, and the maximum outer diameter of the baffle (4) matches the maximum inner diameter of the stepped hole (32).

4. The hollow shaft output shaft structure according to claim 1, characterized in that, A clip (5) is inserted into the inner annular groove (33), and the clip (5) is engaged with the inner annular groove (33).

5. The hollow shaft output shaft structure according to claim 1, characterized in that, The central screw hole (41) corresponds to the central hole of the reducer working shaft (1), and the diameter of the central screw hole (41) is larger than the diameter of the central hole of the reducer working shaft (1).

6. The hollow shaft output shaft structure according to claim 1, characterized in that, The reducer working shaft (1) is connected to the keyed hollow shaft (3) by a key, and the diameter of the stepped hole (32) is larger than the diameter of the central inner hole (31).

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