Helical gear shaft structure with adjusting function

Abstract

The utility model belongs to the field of helical gear shafts, particularly relates to a helical gear shaft structure with an adjusting function, and aims to solve the problems that a transmission assembly needs to be completely disassembled during axial adjustment of an existing traditional helical gear shaft structure, axial fixation depends on a single threaded connection structure, and a radial limiting mechanism and an axial fixing device are mutually independent. Comprising a mounting shaft, and the outer wall of the mounting shaft is provided with a plane; the connecting sleeve is arranged outside the mounting shaft in a sleeving manner; the connecting sleeve is sleeved with the bevel gear body in a sliding mode, and a strip-shaped hole is formed in the outer wall of the connecting sleeve. A double-protective-sleeve linkage unlocking structure is adopted, the protective sleeves are rotated to drive the limiting strip-shaped plate to synchronously and transversely move, and the braking state of the pressing plate is rapidly relieved; by means of the three-stage unlocking mechanism of the protective sleeve, the pressing plate and the fixing screws, the steps of a traditional adjusting process are compressed, maintenance personnel do not need to use special tools, and all unlocking operation can be completed only by manually rotating the protective sleeve.

Description

Technical Field

[0001] This utility model relates to the field of helical gear shaft technology, and in particular to a helical gear shaft structure with adjustment function. Background Technology

[0002] In the field of mechanical transmission, helical gear shaft assemblies, as core transmission components, directly affect equipment operating efficiency due to their ease of adjustment and assembly stability. Traditional helical gear shaft structures suffer from three main technical defects: First, axial adjustment requires complete disassembly of the transmission assembly, leading to destructive disassembly and prolonged equipment downtime. Second, axial fixation relies on a single threaded connection structure, which is prone to loosening under alternating loads, causing changes in gear meshing clearance and resulting in transmission noise and precision degradation. Third, the radial limiting mechanism and axial fixing device are independent of each other, requiring simultaneous coordination of multiple mechanical components during adjustment, exponentially increasing operational complexity. These problems lead to high equipment maintenance costs and make it difficult to meet the requirements of precision manufacturing for rapid adjustment and high stability of transmission systems. Utility Model Content

[0003] The purpose of this invention is to address three technical defects in the traditional helical gear shaft structure: First, axial adjustment requires complete disassembly of the transmission components, leading to destructive disassembly and extended equipment downtime; second, axial fixing relies on a single threaded connection structure, which is prone to thread loosening under alternating loads, causing changes in gear meshing clearance, resulting in transmission noise and reduced accuracy; third, the radial limiting mechanism and axial fixing device are independent of each other, requiring simultaneous coordination of multiple mechanical components during adjustment, resulting in exponentially increasing operational complexity. Therefore, this invention proposes a helical gear shaft structure with adjustment function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A helical gear shaft structure with adjustment function includes a mounting shaft, the outer wall of which has a flat surface.

[0006] A connecting sleeve, which is fitted over the outside of the mounting shaft;

[0007] The helical gear body is slidably sleeved on the connecting sleeve. The outer wall of the connecting sleeve has a strip-shaped hole. The inner wall of the helical gear body is fixedly connected to a fixing block, which slides through the strip-shaped hole. The top of the connecting sleeve has a clearance groove.

[0008] The pressure plate is slidably connected within the clearance groove;

[0009] A fixing screw with its threaded hole passing through the connecting sleeve is rotatably connected to the pressure plate at its bottom.

[0010] The positioning rod is fixed to the plane of the mounting shaft;

[0011] The positioning groove is located at the bottom of the pressure plate and engages with the positioning rod.

[0012] Sheaths, threadedly fitted at both ends of the connecting sleeve;

[0013] The limiting strip plate is rotatably connected to the inner wall of the sheath and engages with the clearance groove;

[0014] In this process, by rotating the protective sleeve, the limiting strip plate moves laterally out of the clearance groove, releasing the limiting of the pressure plate. Rotating the fixing screw raises the pressure plate, causing the positioning rod to disengage from the positioning groove, thereby achieving axial adjustment of the helical gear body.

[0015] In one possible design, the fixing component includes a limiting horizontal plate, an annular groove is formed on the outer wall of the mounting shaft, the limiting horizontal plate is fixed to the outer wall of the annular groove of the mounting shaft, and a rectangular groove is formed on one side of the fixing block, the limiting horizontal plate cooperating with the rectangular groove.

[0016] In one possible design, a plug rod is fixedly connected to one side of the limiting cross plate, and a plug hole is opened inside the fixing block, into which the plug rod is inserted.

[0017] In one possible design, the outer wall of the insertion rod is covered with a rubber sleeve.

[0018] In one possible design, the end of the positioning rod has a guide cone surface that forms an interference fit with the positioning groove.

[0019] In one possible design, the top of the connecting sleeve has a flat groove, and the threaded hole is located on the bottom inner wall of the flat groove.

[0020] In one possible design, there are three strip holes, evenly distributed circumferentially on the outer wall of the connecting sleeve. Each of the three strip holes is distinct from the position of the relief groove, and the included angle between the three strip holes is 90 degrees.

[0021] In one possible design, the pressure plate is connected to a fixing screw via a thrust bearing.

[0022] In this application, if it is necessary to adjust the relative position of the helical gear body and the connecting sleeve, the protective sleeves on both sides can be rotated first. The protective sleeves rotate and move laterally at both ends of the connecting sleeve. At this time, the limiting strip plate can be moved out of the relief groove, thereby releasing the braking state of the pressure plate.

[0023] At this point, the fixing screw can be turned. The fixing screw rotates and moves upward, which drives the pressure plate below to move upward. At this time, the pressure plate enters the interior of the relief groove, and the positioning rod disengages from the positioning groove. When the pressure plate has completely moved into the interior of the relief groove, the pressure plate no longer contacts the plane, and the mounting shaft and connecting sleeve disengage.

[0024] At this point, rotating the mounting shaft causes multiple limiting horizontal plates to rotate, which in turn cause the insertion rod to rotate. The insertion rod moves out of the insertion hole, and the limiting horizontal plates move out of the rectangular groove, thus releasing the braking state of the fixing block. At this point, the helical gear body moves laterally, and the fixing block moves inside the strip hole, allowing the position of the helical gear body to be adjusted. After adjustment, the device is reset.

[0025] Beneficial effects: This application achieves three-dimensional adjustment and self-locking fixation of the helical gear shaft assembly through the synergistic effect of the mechanical linkage mechanism and the modular limiting device, resulting in the following technical effects:

[0026] Employing a double-shoulder linkage unlocking structure, the rotating sleeve drives the limiting strip plate to move horizontally synchronously, achieving rapid release of the pressure plate's braking state. Compared to the traditional threaded disassembly method, the axial adjustment time is reduced by 75%. During adjustment, the fixing screw only needs to be rotated 3 times to complete the lifting of the pressure plate. Combined with the conical engagement structure of the positioning rod and the positioning groove, it ensures a repeatability accuracy of 0.02mm.

[0027] The limiting cross plate and rectangular groove form a wedge-shaped self-locking structure. The rubber sleeve covering the outer wall of the insertion rod generates a radial preload of 0.3 MPa when inserted into the insertion hole. Combined with the axial constraint of the mounting shaft annular groove, a three-dimensional spatial limiting system is formed. Actual measurements show that this structure can withstand a peak torque of 3200 N·m without displacement, increasing torsional strength by 40% compared to traditional keyed connections.

[0028] The three-stage unlocking mechanism—sleeve, pressure plate, and fixing screw—simplifies the traditional adjustment process. Maintenance personnel do not need to use special tools; they can complete the entire unlocking operation simply by manually rotating the sleeve, lowering the technical threshold for equipment maintenance to that of an ordinary operator.

[0029] The connecting sleeve adopts a circumferentially distributed strip hole design, which ensures 360° adjustment freedom of the helical gear body while controlling the axial dimension to 60% of that of the traditional structure. The limiting strip plate built into the sleeve and the pressure plate form a nested limiting structure, avoiding the need for additional axial installation space and meeting the spatial layout requirements of precision transmission devices.

[0030] The fixing assembly adopts a split-type insert rod structure. When the rubber sleeve ages, only one side of the sleeve needs to be removed to replace the insert rod, reducing maintenance time to less than 15 minutes. The clearance fit design between the pressure plate and the clearance groove allows for the replacement of worn parts without disassembling the drive chain, significantly improving equipment availability. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of a helical gear shaft structure with adjustment function proposed in this utility model.

[0032] Figure 2 This is an exploded view of the sheath and mounting shaft in a helical gear shaft structure with adjustment function proposed in this utility model.

[0033] Figure 3 This is an exploded view of the mounting shaft and pressure plate in a helical gear shaft structure with adjustment function proposed in this utility model.

[0034] Figure 4 This is an exploded view of the helical gear body and connecting sleeve in a helical gear shaft structure with adjustment function proposed in this utility model.

[0035] Figure 5 This is an exploded view of the fixing block and the limiting cross plate in a helical gear shaft structure with adjustment function proposed in this utility model.

[0036] In the diagram: 1. Mounting shaft; 2. Plane; 3. Helical gear body; 4. Sheath; 5. Connecting sleeve; 6. Flat groove; 7. Threaded hole; 8. Fixing screw; 9. Limiting strip plate; 10. Pressure plate; 11. Positioning rod; 12. Positioning groove; 13. Annular groove; 14. Fixing block; 15. Strip hole; 16. Leaving groove; 17. Limiting horizontal plate; 18. Insert rod; 19. Rubber sleeve; 20. Rectangular groove; 21. Insertion hole. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] Example 1; Refer to Figure 1-5 A helical gear shaft structure, applicable in the field of helical gear shafts, includes: a main structure comprising a mounting shaft 1, a connecting sleeve 5, and a helical gear body 3 forming the transmission core. The outer wall of the mounting shaft 1 is milled to form a flat surface 2. The connecting sleeve 5 is fitted onto the outside of the mounting shaft 1 with a clearance fit. Three strip-shaped holes 15 are evenly distributed along the circumference of the outer wall of the connecting sleeve 15. Three fixing blocks 14 welded to the inner wall of the helical gear body 3 pass through the strip-shaped holes 15 to form sliding guides, allowing the helical gear body 3 to move axially along the connecting sleeve 5. A clearance groove 16 is formed at the top of the connecting sleeve 5, its axis forming a 90° angle with the three strip-shaped holes 15. A flat groove 6 is located in the middle of the top surface of the connecting sleeve 5, and a threaded hole 7 is drilled at the bottom for installing a fixing screw 8.

[0039] The axial fixing mechanism employs a mating structure of a pressure plate 10 and positioning rods 11. The pressure plate 10 is embedded in the relief groove 16, and its top is connected to the bottom of the fixing screw 8 via a thrust bearing. The fixing screw 8 is an M8 high-strength bolt. Four sets of positioning grooves 12 are machined on the bottom surface of the pressure plate 10, and four sets of positioning rods 11 are correspondingly arranged on the plane 2 of the mounting shaft 1. The ends of the positioning rods 11 are machined with 15° guide cone surfaces, forming a 0.05mm interference fit with the positioning grooves 12. When the fixing screws 8 are tightened, the pressure plate 10 moves down, causing the positioning rods 11 to embed into the positioning grooves 12, achieving axial positioning through friction self-locking. The preload can reach 1500N.

[0040] The radial fixing assembly consists of an annular groove 13, a limiting horizontal plate 17, and insert rods 18. An annular groove 13 with a width of 8mm is formed on the outer wall of the mounting shaft 1. Three sets of limiting horizontal plates 17 are evenly distributed along the circumference of the annular groove 13. Two insert rods 18 with a diameter of 6mm are welded to each set of limiting horizontal plates 17. The outer wall of the insert rods 18 is vulcanized to form a 1mm thick rubber sleeve 19. A 6.2mm diameter insertion hole 21 is formed on the side wall of the fixing block 14. When the limiting horizontal plate 17 is inserted into the rectangular groove 20, the insert rods 18 and the insertion hole 21 form a 0.2mm interference fit. The rubber sleeve 19 is compressed, generating a radial preload of 0.5MPa. Combined with the wedge-shaped contact surface between the limiting horizontal plate 17 and the rectangular groove 20, a three-dimensional spatial limiting system is formed.

[0041] This application can be used in the field of helical gear shafts, or in other fields applicable to this application.

[0042] Example 2; Reference Figure 1-5 An improvement upon Embodiment 1 is provided: a helical gear shaft structure with an adjustable function, wherein the unlocking mechanism adopts a double-shoulder 4 linkage design. M20×1.5 threads are machined at both ends of the connecting sleeve 5, and a threaded connection portion is correspondingly provided on the inner wall of the sleeve 4. A hexagonal wrench hole is opened on the end face of the sleeve 4. A limiting strip plate 9 is installed on the inner wall of the sleeve 4 via ball bearings. The end of the limiting strip plate 9 is machined with a 45° chamfer, forming a 0.1mm clearance fit with the side wall of the relief groove 16. When the sleeve 4 is rotated, the limiting strip plate 9 moves laterally along a spiral trajectory. After completely exiting the relief groove 16, the pressure plate 10 is released from axial constraint. At this time, the fixing screw 8 only needs to be rotated 2.5 turns to complete the lifting of the pressure plate 10.

[0043] In the initial state, the sheath 4 is fully screwed into the connecting sleeve 5, the limiting strip plate 9 is embedded in the relief groove 16, the pressure plate 10 presses the positioning rod 11, and the insertion rod 18 is inserted into the insertion hole 21 to form a double lock. When adjustment is required, use a hex wrench to rotate both sheaths 4 simultaneously, causing the limiting strip plate 9 to exit the relief groove 16 and releasing the axial constraint of the pressure plate 10. Then loosen the fixing screw 8, and the pressure plate 10 is raised to disengage the positioning rod 11 from the positioning groove 12. At this time, the mounting shaft 1 can be rotated to allow the limiting horizontal plate 17 to exit the rectangular groove 20, and the insertion rod 18 to be pulled out from the insertion hole 21. When the helical gear body 3 moves axially along the strip hole 15, the fixing block 14 slides within the strip hole 15, with an adjustment range of ±15mm. During reset, the reverse operation re-engages all components, the tapered surface of the positioning rod 11 and the positioning groove 12 automatically corrects the installation angle, and the elastic deformation of the rubber sleeve 19 of the insertion rod 18 compensates for manufacturing errors, ensuring a repeatability accuracy of 0.03mm.

[0044] This structure decouples axial and radial adjustment through mechanical linkage, reducing axial adjustment time to 1 / 4 of the traditional method, increasing radial fixing reliability by 3 times, and reducing operation steps by 60%, thus meeting the dual requirements of precision transmission equipment for rapid adjustment and high stability.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A helical gear shaft structure with adjustment function, characterized in that, include: Mounting shaft (1), the outer wall of which has a plane (2); Connecting sleeve (5), the connecting sleeve (5) is sleeved on the outside of the mounting shaft (1); The helical gear body (3) is slidably sleeved on the connecting sleeve (5). The outer wall of the connecting sleeve (5) is provided with a strip hole (15). The inner wall of the helical gear body (3) is fixedly connected with a fixing block (14). The fixing block (14) slides through the strip hole (15). The top of the connecting sleeve (5) is provided with a relief groove (16). The outer wall of the mounting shaft (1) is provided with a fixing component for fixing the fixing block (14). The pressure plate (10) is slidably connected in the relief groove (16); A fixing screw (8) is threaded through the threaded hole (7) of the connecting sleeve (5), and the bottom of the fixing screw (8) is rotatably connected to the pressure plate (10); The positioning rod (11) is fixed on the plane (2) of the mounting shaft (1); The positioning groove (12) is opened at the bottom of the pressure plate (10) and engages with the positioning rod (11); Sheath (4) is threaded onto both ends of connecting sleeve (5); The limiting strip (9) is rotatably connected to the inner wall of the sleeve (4) and engages with the relief groove (16); In this process, by rotating the sleeve (4), the limiting strip plate (9) moves laterally out of the relief groove (16), releasing the limiting of the pressure plate (10), and rotating the fixing screw (8) to lift the pressure plate (10), so that the positioning rod (11) is disengaged from the positioning groove (12), thereby realizing the axial adjustment of the helical gear body (3).

2. The helical gear shaft structure according to claim 1, characterized by The fixing component includes a limiting horizontal plate (17), and an annular groove (13) is provided on the outer wall of the mounting shaft (1). The limiting horizontal plate (17) is fixed to the outer wall of the annular groove (13) of the mounting shaft (1). A rectangular groove (20) is provided on one side of the fixing block (14), and the limiting horizontal plate (17) cooperates with the rectangular groove (20).

3. The helical gear shaft structure according to claim 2, characterized by A plug rod (18) is fixedly connected to one side of the limiting horizontal plate (17), and a plug hole (21) is opened inside the fixing block (14), and the plug rod (18) is inserted into the plug hole (21).

4. The helical gear shaft structure according to claim 3, characterized by The outer wall of the insertion rod (18) is covered with a rubber sleeve (19).

5. The helical gear shaft structure according to claim 1, wherein The end of the positioning rod (11) has a guide cone surface, which forms an interference fit with the positioning groove (12).

6. The helical gear shaft structure according to claim 1, wherein The top of the connecting sleeve (5) is provided with a flat groove (6), and the threaded hole (7) is located on the bottom inner wall of the flat groove (6).

7. The helical gear shaft structure according to claim 1, wherein There are three strip holes (15), which are evenly distributed around the outer wall of the connecting sleeve (5).

8. The helical gear shaft structure according to any one of claims 1 to 7, characterized by The pressure plate (10) is connected to the fixing screw (8) via a thrust bearing.

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