Spline shaft with spline replacement structure

Abstract

The utility model relates to the technical field of spline shafts, in particular to a spline shaft with a spline replacement structure, which comprises a main shaft, a spline main body is arranged on the main shaft, and a positioning mechanism used for distributing the spline main body on the outer side of the main shaft at equal intervals is arranged between the main shaft and the spline main body. A limiting mechanism used for stably limiting the spline body on the outer side of the main shaft is further arranged between the main shaft and the spline body. The first connecting plate is driven by the displacement mechanism in a threaded connection mode to drive the inserting block and the inserting groove to be in clamped butt joint, due to the fact that threaded connection has higher fastening force, loosening and displacement between the spline body and the main shaft can be effectively prevented, the stability and safety of spline body installation are improved, and the service life of the spline body is prolonged. The technical problems that when a spring is in a high-load or vibration environment, pretightening force is prone to being weakened, so that a connecting part is loosened or slides, and the stability of spline installation is reduced are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to spline shaft technical field, concretely relates to a spline shaft with spline replacement structure. BACKGROUND

[0002] Spline shaft is a kind of common mechanical parts, usually used to transmit rotary power. Spline shaft is connected by spline and matched spline sleeve. Spline shaft can transmit larger torque through accurate matching with spline sleeve, is suitable for high-load power transmission system, and spline shaft connection mode is more flexible than traditional cylindrical connection mode, can transmit rotary motion without easy slip, and spline shaft has larger contact area, so that it can effectively disperse the pressure generated in transmission process, reduce local wear and tear, prolong the service life of parts, and bear larger load.

[0003] Chinese authorized patent publication number CN218266761U discloses a spline detachable spline shaft, which comprises a second shaft rod, a plurality of placing grooves are arranged on the right side of the outer diameter of the second shaft rod, a fixed groove is arranged at one end of the inner side of the placing groove, a sliding groove is arranged at both ends of the fixed groove, a spring is fixedly connected to the opposite end of the sliding groove, a clamping column is fixedly connected to the opposite end of the spring, the clamping column is slidingly connected to the inner wall of the sliding groove, a spline is arranged on the inner wall of the placing groove, a fixed column is fixedly connected to one end of the inner side of the spline, and a clamping groove is arranged at both ends of the fixed column. In the utility model, the installation of spline is facilitated by the cooperation of clamping column and clamping groove, time is saved, and the spline is also conveniently disassembled and replaced. The mass of spline shaft is reduced to a certain extent by opening a through hole, production cost is reduced, overall strength of spline shaft is increased, and service life is improved.

[0004] In the above-mentioned patent, the fixed column at the bottom end of the spline is inserted into the sliding groove in the placing groove, the fixed column extrudes the clamping column, the clamping column extrudes the spring to move to both sides, the spring rebounds to clamp the clamping column in the clamping groove, and the installation of the spline is completed. Although the cooperation of spring, clamping column and clamping groove facilitates the quick installation of spline, the spring is prone to unstable response due to its elastic property under high load or vibration environment, which can weaken the pre-tightening force of the spring and cause the connection part to loosen or slip, thereby reducing the stability of spline installation. Therefore, we propose a spline shaft with spline replacement structure. SUMMARY

[0005] In view of the above problems, a spline shaft with a spline replacement structure is provided, which drives the displacement of the connecting plate in a threaded connection manner through the displacement mechanism, so that the plug and the slot are engaged and connected, and since the threaded connection has stronger fastening force, it can effectively prevent the loosening and displacement between the spline main body and the main shaft, solve the technical problem that the spring is prone to weaken the pre-tightening force under high load or vibration environment, thereby causing the loosening or sliding of the connecting part, and reducing the stability of the spline installation.

[0006] To solve the problems in the prior art, the utility model provides a spline shaft with a spline replacement structure, which comprises a main shaft, a spline main body is arranged on the main shaft, a positioning mechanism for equally spacing the spline main body outside the main shaft is arranged between the main shaft and the spline main body, a limiting mechanism for stably limiting the spline main body outside the main shaft is further arranged between the main shaft and the spline main body, and a lifting mechanism for assisting the spline main body to separate from the main shaft is arranged on the main shaft.

[0007] Preferably, the positioning mechanism comprises a clamping block and a clamping groove; the clamping block is connected with the spline main body; the clamping groove is arranged on one side of the main shaft close to the spline main body, and is used for engaging and connecting with the clamping block.

[0008] Preferably, the limiting mechanism comprises a plug, a slot and a displacement mechanism; the plug is arranged on the main shaft; the slot is arranged on one side of the clamping block close to the plug, and is used for engaging and connecting with the plug; and the displacement mechanism is arranged on the main shaft and is used for driving the plug and the slot to engage and connect.

[0009] Preferably, the displacement mechanism comprises a first connecting plate, a first sliding groove and a screw rod; the first connecting plate is connected with the plug; the first sliding groove is arranged on one side of the main shaft close to the first connecting plate, and is used for linearly moving with the first connecting plate; and the screw rod is rotatably arranged on the main shaft and is in threaded connection with the first connecting plate.

[0010] Preferably, the lifting mechanism comprises a lifting plate and a transmission mechanism; the lifting plate is arranged between the main shaft and the spline main body; and the transmission mechanism is arranged between the main shaft and the lifting plate and is used for driving the lifting plate to linearly move.

[0011] Preferably, the transmission mechanism comprises a first toothed plate, a gear set and a second toothed plate; the first toothed plate is slidably arranged on the main shaft, and the upper end of the first toothed plate is connected with the lifting plate; the gear set is rotatably arranged on the main shaft, and the middle part of the gear set is connected with the first toothed plate; and the second toothed plate is slidably arranged on the main shaft and is connected with the two sides of the gear set.

[0012] Preferably, the lifting mechanism further comprises a second connecting plate, a push plate and a guide mechanism; the second connecting plate is connected with the second toothed plate; the push plate is connected with the upper side of the second connecting plate; the guide mechanism is arranged between the second connecting plate and the main shaft, and is used for cooperating with the second connecting plate to move linearly.

[0013] Preferably, the guide mechanism comprises a sliding block, a second sliding groove and an elastic reset member; the sliding block is connected with the second connecting plate; the second sliding groove is arranged on the side of the main shaft close to the sliding block, and is used for cooperating with the sliding block to move linearly; the elastic reset member is arranged in the second sliding groove, and two ends of the elastic reset member are connected with the sliding block and the second sliding groove respectively.

[0014] The present application has the following beneficial effects compared with the prior art:

[0015] 1. The first connecting plate drives the plug and the slot to be clamped and docked in a threaded connection manner through the displacement mechanism, the threaded connection has stronger fastening force, can effectively prevent loosening and displacement between the spline main body and the main shaft, improves the stability and safety of the spline main body installation, and solves the technical problems that the spring is prone to cause pre-tightening force to weaken under high load or vibration environment, thereby causing the connection part to loosen or slip, and reducing the stability of the spline installation.

[0016] 2. The horizontal thrust applied by the operator is converted into vertical lifting force through the meshing of the first toothed plate and the second toothed plate of the lifting mechanism and the gear set, the disengagement resistance of the clamping block and the clamping groove is reduced, the spline main body and the main shaft are conveniently separated, and the technical problems that the clamping block and the clamping groove are jammed, corroded or have too large mechanical resistance, thereby causing the spline main body to be difficult to disassemble, low in efficiency and easy to damage parts are solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a main shaft and a screw rod and a connecting structure of a spline shaft with a spline replacement structure.

[0018] Figure 2 It is a first connecting plate and a screw rod and a connecting structure of a spline shaft with a spline replacement structure.

[0019] Figure 3 It is a main shaft and a spline main body and a connecting structure of a spline shaft with a spline replacement structure.

[0020] Figure 4 It is a first toothed plate and a gear set and a connecting structure of a spline shaft with a spline replacement structure.

[0021] Figure 5 It is a first toothed plate and a gear set and a connecting structure of a spline shaft with a spline replacement structure. Figure 2 It is an enlarged schematic view of A in the middle.

[0022] Figure 6 A spline shaft with spline replacement structure Figure 2 An enlarged schematic view at B in the middle.

[0023] Figure 7 A spline shaft with spline replacement structure Figure 3 An enlarged schematic view at C in the middle.

[0024] The figure label is: 1, main shaft; 11, spline main body; 2, clamping block; 21, clamping groove; 22, insertion block; 23, insertion groove; 24, first connecting plate; 25, first sliding groove; 26, screw; 27, lifting plate; 28, first tooth plate; 29, gear set; 210, second tooth plate; 211, second connecting plate; 212, push plate; 213, sliding block; 214, second sliding groove; 215, elastic reset piece. DETAILED DESCRIPTION

[0025] In order to further understand the characteristics, technical means and specific purposes and functions reached by the utility model, the utility model will be described in further detail below in combination with the drawings and specific embodiments.

[0026] Referring to Figures 1-3 and Figure 6 , a spline shaft with spline replacement structure, comprising a main shaft 1, the main shaft 1 is provided with a spline main body 11, the main shaft 1 and the spline main body 11 are provided with a positioning mechanism for distributing the spline main body 11 at intervals on the outside of the main shaft 1; the main shaft 1 and the spline main body 11 are also provided with a limiting mechanism for stably limiting the spline main body 11 on the outside of the main shaft 1; the main shaft 1 is provided with a lifting mechanism for assisting the spline main body 11 to separate from the main shaft 1; the positioning mechanism comprises a clamping block 2 and a clamping groove 21; the clamping block 2 is connected with the spline main body 11; the clamping groove 21 is opened on the side of the main shaft 1 close to the spline main body 11, and the clamping groove 21 is used for clamping and docking with the clamping block 2; the limiting mechanism comprises an insertion block 22, an insertion groove 23 and a displacement mechanism; the insertion block 22 is arranged on the main shaft 1; the insertion groove 23 is opened on the side of the clamping block 2 close to the insertion block 22, and the insertion groove 23 is used for clamping and docking with the insertion block 22; the displacement mechanism is arranged on the main shaft 1, and the displacement mechanism is used for driving the insertion block 22 and the insertion groove 23 to clamp and dock; the displacement mechanism comprises a first connecting plate 24, a first sliding groove 25 and a screw 26; the first connecting plate 24 is connected with the insertion block 22; the first sliding groove 25 is opened on the side of the main shaft 1 close to the first connecting plate 24, and the first sliding groove 25 is used for linear movement with the first connecting plate 24; the screw 26 is rotatably arranged on the main shaft 1, and the screw 26 is threadedly connected with the first connecting plate 24.

[0027] Specifically, the card block 2 and the card slot 21 constitute a matching structure. The plug block 22 and the plug slot 23 constitute a matching structure. The first connecting plate 24 and the first sliding groove 25 constitute a matching structure. The threads on both ends of the screw rod 26 are opposite in direction.

[0028] In the operation of replacing the spline body 11 of the main shaft 1, by rotating the screw rod 26, the matching structure of the connecting plate and the sliding groove is used to limit the rotation of the connecting plate with the screw rod 26; at the same time, based on the threaded connection relationship between the connecting plate and the screw rod 26 and the design of the opposite threads on both ends of the screw rod 26, the two connecting plates can be moved towards each other, and then the two first connecting plates 24 drive the plug block 22 to disengage from the plug slot 23 and enter the sliding groove. At this time, the worker can directly pull up the spline body 11, so that the spline body 11 drives the card block 2 to disengage from the card slot 21, and the disassembly process of the spline body 11 is completed.

[0029] When installing a new spline body 11, the card block 2 of the new spline body 11 is butted with the card slot 21, and the matching structure of the card block 2 and the card slot 21 ensures the positioning stability of the card block 2 in the card slot 21; then rotate the screw rod 26 to move the two connecting plates in opposite directions, drive the plug block 22 to engage with the plug slot 23, and through the matching structure of the plug block 22 and the plug slot 23, the anti-shaking performance of the plug block 22 in the plug slot 23 is guaranteed, so that the spline body 11 is stably positioned outside the main shaft 1.

[0030] The above structure design of driving the plug block 22 to engage or disengage with the plug slot 23 through the rotation of the screw rod 26 to drive the connecting plate, realizes the convenient operation of the spline body 11 disassembly and installation process; at the same time, the cooperation of threaded connection and clamping structure enhances the reliability of the connection between the spline body 11 and the main shaft 1, effectively reduces the risk of loosening caused by vibration or load change, and improves the durability of the spline shaft.

[0031] Referring to Figures 2-5 and Figure 7As shown, the lifting mechanism comprises a lifting plate 27 and a transmission mechanism; the lifting plate 27 is arranged between the main shaft 1 and the spline body 11; the transmission mechanism is arranged between the main shaft 1 and the lifting plate 27, and is used to drive the lifting plate 27 to move linearly; the transmission mechanism comprises a first toothed plate 28, a gear set 29 and a second toothed plate 210; the first toothed plate 28 is slidably arranged on the main shaft 1, and the upper end of the first toothed plate 28 is connected with the lifting plate 27; the gear set 29 is rotatably arranged on the main shaft 1, and the middle part of the gear set 29 is butted against the first toothed plate 28; the second toothed plate 210 is slidably arranged on the main shaft 1, and the second toothed plate 210 is respectively butted against the two sides of the gear set 29; the lifting mechanism further comprises a second connecting plate 211, a push plate 212 and a guide mechanism; the second connecting plate 211 is connected with the second toothed plate 210; the push plate 212 is connected with the upper side of the second connecting plate 211; the guide mechanism is arranged between the second connecting plate 211 and the main shaft 1, and is used to cooperate with the second connecting plate 211 to move linearly; the guide mechanism comprises a sliding block 213, a second sliding groove 214 and an elastic reset member 215; the sliding block 213 is connected with the second connecting plate 211; the second sliding groove 214 is opened on the side of the main shaft 1 close to the sliding block 213, and is used to cooperate with the sliding block 213 to move linearly; the elastic reset member 215 is arranged in the second sliding groove 214, and the two ends of the elastic reset member 215 are respectively connected with the sliding block 213 and the second sliding groove 214.

[0032] Specifically, the first toothed plate 28 and the second toothed plate 210 are respectively engaged with the gear set 29. The sliding block 213 and the second sliding groove 214 constitute a sliding pair. The elastic reset member 215 selects a spring as an implementation element. One side of the first toothed plate 28 is provided with a guide rail.

[0033] When the plug 22 is separated from the slot 23, the operator pulls up the spline body 11, can first push the push plate 212, drives the second toothed plate 210 to move synchronously through the connecting plate. In this process, the connecting plate drives the sliding block 213 to slide along the sliding groove and extrude the elastic reset member 215, so that it produces elastic deformation. The sliding pair guide action of the sliding block 213 and the sliding groove ensures that the connecting plate drives the second toothed plate 210 to move stably. The second toothed plate 210 drives the gear set 29 to rotate through the engagement relationship with the gear set 29, and then drives the first toothed plate 28 to move upward along the guide rail through the engagement transmission of the gear set 29 and the first toothed plate 28. The guide action of the guide rail to the first toothed plate 28 ensures the linear motion precision, so that the first toothed plate 28 pushes the lifting plate 27 to exert an axial force on the spline body 11, and promotes the spline body 11 to drive the clamping block 2 to separate from the clamping groove 21.

[0034] When the card block 2 and the card slot 21 are difficult to separate due to jamming or rust, the horizontal pushing force applied by the operator is converted into vertical lifting force by the first toothed plate 28 and the second toothed plate 210 meshing with the gear set 29, effectively reducing the separation resistance of the card block 2 and the card slot 21, and achieving convenient separation of the spline main body 11 and the main shaft 1. Not only improves the disassembly efficiency, but also reduces the labor intensity of the operator.

[0035] Working principle: when the main shaft 1 replaces the spline main body 11, rotate the screw rod 26, make the two first connecting plates 24 drive the plug block 22 to separate from the plug slot 23 and enter the sliding slot, at this time, push the push plate 212, convert the horizontal pushing force applied by the operator into vertical lifting force by the first toothed plate 28 and the second toothed plate 210 meshing with the gear set 29 respectively, make the lifting plate 27 push the spline main body 11, realize convenient separation of the spline main body 11 and the main shaft 1, then rotate the screw rod 26 to make the two connecting plates move reversely, drive the plug block 22 to be engaged with the plug slot 23, so as to stably limit the spline main body 11 outside the main shaft 1.

[0036] The above embodiment only expresses one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A spline shaft with a spline replacement structure, comprising a main shaft (1) provided with a spline body (11), characterized in that, a positioning mechanism is arranged between the main shaft (1) and the spline body (11) for equally spacing the spline body (11) outside the main shaft (1); a limiting mechanism is further arranged between the main shaft (1) and the spline body (11) for stably limiting the spline body (11) outside the main shaft (1); and a lifting mechanism is arranged on the main shaft (1) for assisting the spline body (11) to separate from the main shaft (1). The positioning mechanism comprises a clamping block (2) and a clamping groove (21); The clamping block (2) is connected with the spline body (11); The clamping groove (21) is arranged on one side of the main shaft (1) close to the spline body (11), and is used for clamping and docking with the clamping block (2).

2. The spline shaft with a spline replacement structure according to claim 1, characterized by The limiting mechanism comprises an insertion block (22), an insertion groove (23) and a displacement mechanism; The insertion block (22) is arranged on the main shaft (1); The insertion groove (23) is arranged on one side of the clamping block (2) close to the insertion block (22), and is used for clamping and docking with the insertion block (22); 3. The spline shaft with a spline replacement structure according to claim 1, characterized by The displacement mechanism is arranged on the main shaft (1), and is used for driving the insertion block (22) and the insertion groove (23) to clamp and dock. The displacement mechanism comprises a first connecting plate (24), a first sliding groove (25) and a screw rod (26); The first connecting plate (24) is connected with the insertion block (22); The first sliding groove (25) is arranged on one side of the main shaft (1) close to the first connecting plate (24), and is used for linear movement with the first connecting plate (24); 4. The spline shaft with a spline replacement structure according to claim 3, characterized by The screw rod (26) is rotatably arranged on the main shaft (1), and is threadedly connected with the first connecting plate (24). The lifting mechanism comprises a lifting plate (27) and a transmission mechanism; The lifting plate (27) is arranged between the main shaft (1) and the spline body (11); The transmission mechanism is arranged between the main shaft (1) and the lifting plate (27), and is used for driving the lifting plate (27) to move linearly.

5. The spline shaft with a spline replacement structure according to claim 1, characterized by The transmission mechanism comprises a first toothed plate (28), a gear set (29) and a second toothed plate (210); The first toothed plate (28) is slidably arranged on the main shaft (1), and the upper end of the first toothed plate (28) is connected with the lifting plate (27); The gear set (29) is rotatably arranged on the main shaft (1), and the middle part of the gear set (29) is connected with the first toothed plate (28); 6. The spline shaft with a spline replacement structure according to claim 5, characterized by The second toothed plate (210) is slidably arranged on the main shaft (1), and the second toothed plate (210) is connected with both sides of the gear set (29). The lifting mechanism further comprises a second connecting plate (211), a push plate (212) and a guide mechanism; The second connecting plate (211) is connected with the second toothed plate (210); The push plate (212) is connected with the upper side of the second connecting plate (211); 7. The spline shaft with a spline replacement structure according to claim 5, characterized by The guide mechanism is arranged between the second connecting plate (211) and the main shaft (1), and is used for linear movement with the second connecting plate (211). The guide mechanism comprises a sliding block (213), a second sliding groove (214) and an elastic reset member (215); The sliding block (213) is connected with the second connecting plate (211); ​ 8. The spline shaft with a spline replacement structure according to claim 5, characterized by ​ ​ A second sliding groove (214) is arranged on the main shaft (1) near the sliding block (213), and the second sliding groove (214) is used for cooperating with the sliding block (213) to move linearly. An elastic reset member (215) is arranged in the second sliding groove (214), and two ends of the elastic reset member (215) are connected with the sliding block (213) and the second sliding groove (214) respectively.

Images