Threaded cap for recirculating ball mechanical steering gear

Abstract

The utility model belongs to the technical field of automobile steering gear, disclose a kind of thread cover of circulating ball mechanical steering gear, including thread cover body, shell is arranged in thread cover body one side, and fastening thread is arranged in the outer ring of thread cover body, and thread cover body is connected by fastening thread and shell thread, bearing position is arranged in the shell side of thread cover body, angular contact ball bearing is arranged in bearing position, input oil seal position is arranged in the inside of the shell side of thread cover body far from shell, and input oil seal is arranged in input oil seal position, and input shaft is arranged in shell. The root strength of the assembly thread of thread cover is high, and it is good to be self-locked, and it is matched with sealing groove and sealing ring, can prevent steering gear to appear leakage, and it is good to be leakproof, without using thread sealant also can improve leakproofness, simple structure, safe and reliable, convenient to disassemble and rework.

Description

Technical Field

[0001] This utility model belongs to the field of automotive steering technology, and in particular relates to a threaded cover for a recirculating ball mechanical steering gear. Background Technology

[0002] A recirculating ball mechanical steering system is a purely mechanical transmission device widely used in various light and small trucks. Its internal structure involves high-precision mechanical transmission; therefore, a steering system malfunction can significantly impact the vehicle's driving performance and safety.

[0003] However, during use, the existing recirculating ball mechanical steering gear's threaded cover does not have a hard limit at the input oil seal, which poses a risk of the input oil seal coming off. Furthermore, thread sealant is required at the connection between the threaded cover and the housing to prevent the risk of gear oil leakage, but it is not convenient to disassemble and rework. Summary of the Invention

[0004] This utility model addresses the problems in the prior art by proposing the following technical solution: a threaded cover for a recirculating ball mechanical steering gear, comprising a threaded cover body, a housing disposed on one side of the threaded cover body, a fastening thread disposed on the outer ring of the threaded cover body, the threaded cover body being threadedly connected to the housing via the fastening thread, a bearing seat disposed on the side of the threaded cover body near the housing, an angular contact ball bearing disposed within the bearing seat, an input oil seal seat disposed on the side of the threaded cover body away from the housing, an input oil seal disposed within the input oil seal seat, an input shaft disposed within the housing, the input shaft extending through the angular contact ball bearing and the input oil seal to one side of the threaded cover body, and a mounting hole provided on the outer end face of the threaded cover body for installation and disassembly.

[0005] As a preferred embodiment of the above technical solution, a sealing groove is provided on the outer side of the threaded cover body near the housing, and a sealing ring is provided in the sealing groove. The sealing ring is O-shaped to prevent leakage of the steering gear.

[0006] As a preferred embodiment of the above technical solution, the threaded cover body is annular, the assembly thread is a fine thread, and the threaded cover body, input shaft, input oil seal, angular contact ball bearing, housing and sealing ring are all arranged axially.

[0007] As a preferred embodiment of the above technical solution, an oil seal baffle is provided on one side of the input oil seal position. The oil seal baffle is fixedly connected to one side of the threaded cover body. There are four mounting holes, which are distributed in a circular array around the center of the four threaded cover bodies. The mounting holes are located on the outside of the oil seal baffle and the input oil seal.

[0008] As a preferred embodiment of the above technical solution, the housing is provided with a movable groove, and a limiting groove is provided on one side of the movable groove. A limiting structure is provided in the movable groove. The limiting structure is located on the outside of the threaded cover body. There are four limiting structures, which are arranged in a circular array around the center of the threaded cover body. Two of the limiting structures are provided with guide blocks on their tops.

[0009] As a preferred embodiment of the above technical solution, the limiting structure includes a movable plate, a movable rod fixedly installed on one side of the movable plate, the movable rod being movably connected to the movable groove, a limiting rod fixedly installed on one side of the movable rod, a round protrusion fixedly installed at the bottom of the limiting rod, a limiting plate provided on one side of the round protrusion, the limiting plate being inclined on the side near the round protrusion, two connecting springs fixedly installed on one side of the limiting plate, one side of the two connecting springs being fixedly installed to the inner wall of the movable groove, a limiting groove is opened on the outer side of the fastening thread of the threaded cover body, the limiting groove penetrates one side of the movable groove, and the limiting plate is inserted into the limiting groove.

[0010] As a preferred embodiment of the above technical solution, two guide blocks are fixedly installed on the top of two movable plates, a fixed rod is provided on one side of the limiting rod, one side of the fixed rod is fixedly connected to the movable rod, the fixed rod is located between two connecting springs, a slot is provided on the inner wall of one side of the movable groove, and the other side of the fixed rod is inserted into the slot.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention features a threaded cap with high thread root strength and good self-locking properties. Furthermore, the sealing groove and sealing ring work together to prevent leakage in the steering gear, ensuring good sealing performance without the need for thread sealant. The structure is simple, safe, reliable, and easy to disassemble and rework.

[0013] This invention uses the guide block to precisely align the threaded connection between the threaded cap body and the shell, preventing thread misalignment caused by manual operation, reducing assembly time and difficulty, and improving connection strength and stability through the limiting structure, thereby increasing connection efficiency. Attached Figure Description

[0014] Figure 1 The diagram shown is a schematic representation of the overall structure of the embodiment;

[0015] Figure 2 The diagram shown is a cross-sectional view of the internal structure of the threaded cap body according to an embodiment;

[0016] Figure 3 The diagram shown is a cross-sectional view of the overall structure of the embodiment;

[0017] Figure 4 What is shown is Figure 3 Enlarged view of point A;

[0018] Figure 5The diagram shown is a structural diagram of the threaded cap body of an embodiment;

[0019] Figure 6 The image shown is a top view of the threaded cap body of an embodiment;

[0020] Figure 7 The diagram shown is a structural diagram of the threaded cap body of an embodiment;

[0021] Figure 8 The diagram shown is a structural diagram of the defined structure of the embodiment.

[0022] In the diagram: 1. Threaded cap body; 2. Housing; 3. Angular contact ball bearing; 4. Input oil seal position; 5. Input oil seal; 6. Input shaft; 7. Mounting hole; 8. Sealing ring; 9. Oil seal flange; 10. Guide block; 11. Moving plate; 12. Movable rod; 13. Limiting rod; 14. Round convexity; 15. Limiting plate; 16. Connecting spring; 17. Limiting groove; 18. Fixing rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0024] This utility model provides a threaded cover for a recirculating ball mechanical steering gear, such as Figures 1 to 7 As shown, a threaded cover body 1 is provided on one side of the threaded cover body 1, and a housing 2 is provided on the outer ring of the threaded cover body 1. The threaded cover body 1 is threadedly connected to the housing 2 through the fastening thread. A bearing position is provided on the side of the threaded cover body 1 near the housing 2, and an angular contact ball bearing 3 is provided in the bearing position. An input oil seal position 4 is provided inside the side of the threaded cover body 1 away from the housing 2, and an input oil seal 5 is provided in the input oil seal position 4. An input shaft 6 is provided inside the housing 2. The input shaft 6 passes through the angular contact ball bearing 3 and the input oil seal 5 and extends to one side of the threaded cover body 1. A mounting hole 7 is provided on the outer end face of the threaded cover body 1 for installation and disassembly. An oil seal baffle 9 is provided on one side of the input oil seal position. The oil seal baffle 9 is fixedly connected to one side of the threaded cover body 1. There are four mounting holes 7, which are distributed in a circular array around the four centers of the threaded cover body 1. The mounting holes 7 are located outside the oil seal baffle 9 and the input oil seal 5.

[0025] When the threaded cover body 1 is tightened, the threaded cover body 1 is threadedly connected to the housing 2 through the fastening threads, ensuring that the relative positions of the components remain stable and preventing loosening or displacement. This ensures that the steering gear can perform its steering function normally. By installing the angular contact ball bearing 3 in the bearing position, the bearing position of the threaded cover provides a mounting support position for the outer ring of the angular contact ball bearing 3. The bearing position of the threaded cover body 1 has a size of Φ52mm and is used to press-fit the outer ring of the angular contact ball bearing 3, allowing the outer ring of the angular contact ball bearing 3 to be securely installed in this position. The size of the input oil seal position 4 is Φ35mm, through which the input oil seal 5 is installed. The threaded cover has an outer diameter at the oil seal location. The Φ32mm, 1mm thick mechanical retaining edge prevents the input oil seal 5 from coming out, helping it to better perform its sealing function and prevent lubricating oil leakage inside the steering gear. It also prevents external dust, moisture, and other impurities from entering the steering gear, protecting the normal operation of internal components. The mounting hole 7 has a diameter of Φ8, facilitating installation and disassembly. The preload torque of the angular contact ball bearing 3 can be adjusted by tightening and loosening the threaded cap. Different sizes of threaded caps can use the same mounting hole 7, facilitating assembly operations, optimizing the working performance of the angular contact ball bearing 3, extending its service life, and ensuring smooth and reliable steering gear rotation.

[0026] like Figure 5 , Figure 7 As shown, a sealing groove is provided on the outer side of the threaded cover body 1 near the housing 2, and a sealing ring 8 is provided in the sealing groove. The sealing ring 8 is O-shaped, which can prevent leakage of the steering gear.

[0027] The tight fit between the threads, achieved through the combination of the sealing groove and the sealing ring 8, fills the gaps and prevents leakage from the steering gear. Furthermore, the absence of sealant at the threaded connection between the threaded cover body 1 and the housing 2 facilitates rework and disassembly of the steering gear.

[0028] like Figure 2 , Figure 5 , Figure 7 As shown, the threaded cover body 1 is annular in shape, and the assembly thread is a fine thread. The threaded cover body 1, input shaft 6, input oil seal 5, angular contact ball bearing 3, housing 2 and sealing ring 8 are all arranged axially.

[0029] The thread profile angle of the assembly thread of the threaded cap is 60° and the pitch is 1.5mm. The tightness is improved by using fine threads. The axial arrangement allows all components to be arranged sequentially along the same axis, which can effectively utilize the internal space of the steering gear, ensure the stability and reliability of the steering gear under complex stress conditions, and reduce the risk of component damage due to uneven stress. In addition, when the annular threaded cap body 1 is screwed into the housing 2, its axial movement is consistent with the assembly direction of other components, making it easier to achieve precise installation and positioning.

[0030] like Figure 3 , Figure 4 , Figure 8 As shown, the housing 2 has a movable groove, and a limiting groove 17 is provided on one side of the movable groove. A limiting structure is provided in the movable groove. The limiting structure is located on the outside of the threaded cover body 1. There are four limiting structures. The limiting structures are arranged in a circular array around the center of the threaded cover body 1. Two of the limiting structures are provided with guide blocks 10 on their tops.

[0031] By using the movable slot installation limiting structure, when the threaded cover is installed onto the housing 2, the four limiting structures are arranged in a circular array around the center of the threaded cover body 1. This can position the threaded cover body 1 from multiple circumferential directions, improve the stability of the threaded cover body 1, prevent circumferential displacement of the threaded cover body 1 during installation, and ensure that the threaded cover body 1 can be accurately threadedly connected to the housing 2 according to the design requirements. The guide block 10 can also play a good initial guiding role. When the threaded cover is close to the housing 2, the guide block 10 can guide the threaded cover to accurately enter the predetermined installation position, making it easier for it to engage with the threads on the housing 2. This further reduces the installation difficulty and the probability of thread damage caused by misalignment in the early stage of installation, making the installation process smoother.

[0032] like Figure 3 , Figure 4 , Figure 8 As shown, the limiting structure includes a movable plate 11, a movable rod 12 fixedly installed on one side of the movable plate 11, the movable rod 12 being movably connected to the movable groove, a limiting rod 13 fixedly installed on one side of the movable rod 12, a round protrusion 14 fixedly installed at the bottom of the limiting rod 13, a limiting plate 15 provided on one side of the round protrusion 14, the limiting plate 15 having an inclined surface on the side near the round protrusion 14, two connecting springs 16 fixedly installed on one side of the limiting plate 15, one side of the two connecting springs 16 being fixedly installed to the inner wall of the movable groove, a limiting groove 17 being opened on the outer side of the fastening thread of the threaded cover body 1, the limiting groove 17 penetrating one side of the movable groove, and the limiting plate 15 being inserted into the limiting groove 17.

[0033] In the initial state, the limiting plate 15 is located in the movable groove, the connecting spring 16 is in a compressed state, and the guide block 10 and the movable plate 11 are located on one side of the threaded cover body 1. The limiting rod 13 and the round protrusion 14 are both located on one side of the limiting plate 15. When the threaded cover body 1 is installed on the housing 2, the limiting plate 15 corresponds to the limiting groove 17. Pressing the movable plate 11 and the guide block 10 causes the movable rod 12 to drive the limiting rod 13 and the round protrusion 14 to move towards the limiting plate 15. The round protrusion 14 moves along the inclined surface of the limiting plate 15, squeezing the limiting plate 15, causing the connecting spring 16 to stretch, causing the limiting block to move towards the threaded cover body 1 and insert into the limiting groove 17. At this time, one side of the guide block 10 and the movable plate 11 is in contact with one side of the threaded cover body 1, limiting the threaded cover body 1 and thus improving the stability of the threaded cover body 1.

[0034] like Figure 4 , Figure 8 As shown, two guide blocks 10 are fixedly installed on the top of two movable plates 11. A fixed rod 18 is provided on one side of the limiting rod 13. One side of the fixed rod 18 is fixedly connected to the movable rod 12. The fixed rod 18 is located between two connecting springs 16. A slot is provided on the inner wall of one side of the movable groove. The other side of the fixed rod 18 is inserted into the slot.

[0035] When the two guide blocks 10 and the two moving plates 11 drive the limiting rod 13 and the fixed rod 18 to move into the movable groove, the limiting rod 13 and the round protrusion 14 press the limiting plate 15 and the limiting groove 17 to insert into each other. Then, one end of the fixed rod 18 is inserted into the slot, which limits the position of the limiting rod 13 and the round protrusion 14, thereby improving the stability of the insertion of the limiting plate 15 and the limiting groove 17, preventing the limiting structure from becoming loose or shifting, ensuring the firmness of the connection between the threaded cover and the housing 2, and maintaining the relative stability of the various components inside the steering gear.

[0036] Working principle: In use, first install the input oil seal 5 in the input oil seal position 4, then install the angular contact ball bearing 3 in the bearing position, and install the sealing ring 8 in the sealing groove. Then, pass the input shaft 6 through the middle of the threaded cover body 1, the input oil seal 5, and the angular contact ball bearing 3. Through the guiding action of the guide block 10, the fastening thread of the threaded cover body 1 is positioned with the thread on the housing 2, guiding the threaded cover body 1 to accurately enter the predetermined installation position, so that it begins to mesh with the thread on the housing 2. After the threaded cover body 1 is screwed into the housing 2, the angular contact ball bearing 3 is pressed onto the outside of the input shaft 6, and the sealing ring 8 keeps the threaded connection between the threaded cover body 1 and the housing 2 sealed. Then, by using a specific tool inserted into the mounting hole 7, the threaded cover body 1 is tightened or loosened, thereby changing the preload state of the angular contact ball bearing 3 and ensuring that the steering gear is always in good working condition.

[0037] After the threaded cap body 1 is installed on the housing 2, the limiting plate 15 corresponds to the limiting groove 17. Pressing the moving plate 11 and the guide block 10 causes the movable rod 12 to drive the limiting rod 13 and the round protrusion 14 to move towards the limiting plate 15. The round protrusion 14 moves along the inclined surface of the limiting plate 15, pressing the limiting plate 15, which stretches the connecting spring 16, causing the limiting block to move towards the threaded cap body 1 and insert into the limiting groove 17, thus limiting the threaded cap body 1 and keeping it stable. At the same time, after the limiting rod 13 and the round protrusion 14 press the limiting plate 15 and the limiting groove 17 into place, one end of the fixing rod 18 is inserted into the slot. At this time, one side of the guide block 10 and the moving plate 11 is in contact with one side of the threaded cap body 1, limiting the position of the limiting rod 13 and the round protrusion 14, thus maintaining the stability of the insertion of the limiting plate 15 and the limiting groove 17, thereby making the threaded cap body 1 stably installed on the housing 2.

[0038] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A threaded cap for a recirculating ball mechanical steering gear, characterized in that, The device includes a threaded cover body (1), a housing (2) on one side of the threaded cover body (1), a fastening thread on the outer ring of the threaded cover body (1), the threaded cover body (1) being threadedly connected to the housing (2) through the fastening thread, a bearing seat on the side of the threaded cover body (1) near the housing (2), an angular contact ball bearing (3) being installed in the bearing seat, an input oil seal seat (4) on the side of the threaded cover body (1) away from the housing (2), an input oil seal (5) being installed in the input oil seal seat (4), an input shaft (6) being installed in the housing (2), the input shaft (6) extending through the angular contact ball bearing (3) and the input oil seal (5) to one side of the threaded cover body (1), and an installation hole (7) being opened on the outer end face of the threaded cover body (1) for installation and disassembly.

2. The threaded cover of the recirculating ball mechanical steering gear according to claim 1, characterized in that, The threaded cover body (1) has a sealing groove on the outer side near the housing (2), and a sealing ring (8) is provided in the sealing groove. The sealing ring (8) is O-shaped, which can prevent leakage of the steering gear.

3. The threaded cover of the recirculating ball mechanical steering gear according to claim 2, characterized in that, The threaded cover body (1) is annular in shape, and the assembly thread is a fine thread. The threaded cover body (1), input shaft (6), input oil seal (5), angular contact ball bearing (3), housing (2) and sealing ring (8) are all arranged axially.

4. The threaded cover of the recirculating ball mechanical steering gear according to claim 3, characterized in that, An oil seal baffle (9) is provided on one side of the input oil seal position. The oil seal baffle (9) is fixedly connected to one side of the threaded cover body (1). There are four mounting holes (7), which are arranged in a circular array around the center of the four threaded cover bodies (1). The mounting holes (7) are located outside the oil seal baffle (9) and the input oil seal (5).

5. The threaded cover of the recirculating ball mechanical steering gear according to claim 4, characterized in that, The housing (2) has an active groove, and a limiting groove (17) is provided on one side of the active groove. A limiting structure is provided in the active groove. The limiting structure is located outside the threaded cover body (1). There are four limiting structures. The limiting structures are arranged in a circular array around the center of the threaded cover body (1). Two of the limiting structures are provided with guide blocks (10) on their tops.

6. The threaded cap of the recirculating ball mechanical steering gear according to claim 5, characterized in that, The limiting structure includes a movable plate (11), a movable rod (12) is fixedly installed on one side of the movable plate (11), the movable rod (12) is movably connected to the movable groove, a limiting rod (13) is fixedly installed on one side of the movable rod (12), a round protrusion (14) is fixedly installed at the bottom of the limiting rod (13), a limiting plate (15) is provided on one side of the round protrusion (14), the limiting plate (15) is inclined on the side near the round protrusion (14), two connecting springs (16) are fixedly installed on one side of the limiting plate (15), one side of the two connecting springs (16) is fixedly installed to the inner wall of the movable groove, a limiting groove (17) is opened on the outer side of the fastening thread of the threaded cover body (1), the limiting groove (17) penetrates one side of the movable groove, and the limiting plate (15) is inserted into the limiting groove (17).

7. The threaded cap of the recirculating ball mechanical steering gear according to claim 6, characterized in that, The two guide blocks (10) are fixedly installed on the top of the two movable plates (11). A fixed rod (18) is provided on one side of the limiting rod (13). One side of the fixed rod (18) is fixedly connected to the movable rod (12). The fixed rod (18) is located between the two connecting springs (16). A slot is opened on the inner wall of one side of the movable groove. The other side of the fixed rod (18) is inserted into the slot.

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