Opposite pressing device for steering rack needle bearing

Abstract

The utility model discloses a steering rack needle bearing counter-pressing device which comprises an upper press-fitting mechanism and a lower press-fitting mechanism, the press-fitting mechanism comprises an air cylinder, a spring supporting rod connected with the air cylinder and a conical pressing head connected with the front end of the spring supporting rod, and the conical pressing head corresponds to a ball bearing pressing head installed on a supporting plate. A conical pressing head is arranged on the supporting plate, a needle bearing is arranged on the conical pressing head in a sleeved mode, the conical pressing head pushes the needle bearing to be installed in the ball bearing pressing head, the upper press-fitting mechanism is installed above the supporting plate, and the lower press-fitting mechanism is installed below the supporting plate. According to the device, through the precisely designed conical pressing head and ball bearing pressing head structure and the synergistic effect of the upper press-fitting mechanism and the lower press-fitting mechanism, precise positioning and uniform stress of the needle bearing in the mounting process are ensured, so that the press-fitting precision is remarkably improved, the problem of bearing looseness or inaccurate positioning caused by improper mounting is solved, and the service life of the needle bearing is prolonged. And the overall performance and reliability of the steering system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the counterpressure device for the needle roller bearing of a steering rack, and particularly relates to a counterpressure device for the needle roller bearing of a steering rack. Background Technique

[0002] As a key component of an automotive steering system, the installation accuracy and efficiency of the needle roller bearing of a steering rack directly affect the steering performance and manufacturing cost of the whole vehicle. The design of the traditional counterpressure device for the needle roller bearing is relatively rough, and there are problems such as low pressing accuracy and long cycle time, which are difficult to meet the requirements of high-precision and high-efficiency production in modern automotive manufacturing.

[0003] Specifically, it is often difficult to ensure the precise fit between the needle roller bearing and the ball bearing during the pressing process of the traditional counterpressure device, resulting in looseness or inaccurate positioning of the bearing after installation, thereby affecting the stability and reliability of the steering system. Content of the Utility Model

[0004] The technical problem solved by the utility model is to overcome the defects mentioned in the background technique.

[0005] To achieve the above object, the utility model provides the following technical solution: A counterpressure device for the needle roller bearing of a steering rack, including an upper pressing mechanism and a lower pressing mechanism. The pressing mechanism includes a cylinder, a spring support rod connected to the cylinder, and a conical pressing head connected to the front end of the spring support rod. The conical pressing head corresponds to the ball bearing pressing head installed on the support plate, and a needle roller bearing is sleeved on the conical pressing head. The conical pressing head pushes the needle roller bearing to be installed inside the ball bearing pressing head. The upper pressing mechanism is installed above the support plate, and the lower pressing mechanism is installed below the support plate.

[0006] Further, the conical pressing head includes a support ring fixed on the middle rod body, a positioning column arranged in the middle of the upper end of the support ring, and a conical head arranged at the upper end of the positioning column. The head of the conical head has an inclined angle of °, and at the same time, the inner ring of the needle roller bearing is larger than the diameter of the positioning column.

[0007] Further, the conical pressing heads provided on the upper pressing mechanism and the lower pressing mechanism are made of magnetic materials.

[0008] Further, the upper pressing mechanism and the lower pressing mechanism are installed on the same axis.

[0009] Further, a pressure sensor is installed inside the spring support rod.

[0010] Further, a protruding positioning block is arranged in the middle of the support plate, and a through hole for passing through the conical pressing head is opened in the middle of the support plate. At the same time, the positioning block is inserted into the inner port of the lower end of the ball bearing pressing head.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] Through the precisely designed conical indenter and ball bearing indenter structures, and the coordinated action of the upper and lower pressing mechanisms, this device ensures the precise positioning and uniform force application of the needle roller bearing during the installation process, thus significantly improving the pressing accuracy. This not only reduces problems such as bearing looseness or inaccurate positioning caused by improper installation, but also enhances the overall performance and reliability of the steering system;

[0013] Due to the adoption of optimized pressing mechanisms and structural designs, this device can complete operations more quickly and stably during the pressing process, effectively shortening the cycle time. This not only improves the overall efficiency of the production line, but also reduces the manufacturing cost, bringing significant economic benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the structure of the present utility model without pressing;

[0015] Figure 2 is a schematic diagram of the lower pressing mechanism of the structure of the present utility model;

[0016] Figure 3 is a schematic diagram of the conical indenter of the structure of the present utility model;

[0017] Figure 4 is a schematic diagram of the support plate of the structure of the present utility model;

[0018] Figure 5 is a schematic diagram of the pressing mechanism of the structure of the present utility model;.

[0019] Reference numerals in the figures: 1, cylinder; 2, spring support rod; 3, conical indenter; 31, support ring; 32, positioning column; 33, conical head; 4, ball bearing indenter; 5, support plate; 51, positioning block; 6, needle roller bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-5 , the present utility model provides a technical solution: a pair-pressing device for a steering rack needle roller bearing, including an upper pressing mechanism and a lower pressing mechanism, which are respectively installed on the upper and lower sides of the support plate 5 to form a pair-pressing structure.

[0022] Each press-fitting mechanism includes a cylinder 1, a spring support rod 2, and a conical press head 3. The cylinder serves as the power source, and transmits pressure to the conical press head through the spring support rod.

[0023] The conical press head 3 consists of a middle rod body, a support ring 31, a positioning post 32, and a conical head 33. The support ring is fixed on the rod body. The positioning post is arranged in the middle of the upper end of the support ring, and the conical head is installed at the upper end of the positioning post and has a 60° bevel angle. The design of the conical head enables the needle roller bearing 6 to be gradually pushed into the ball bearing press head 4 during the press-fitting process, ensuring the uniformity and stability of the press-fitting.

[0024] The needle roller bearing 6 is sleeved on the conical press head 3. When the conical press head receives the thrust of the cylinder, it will push the needle roller bearing into the ball bearing press head 4.

[0025] The ball bearing press head 4 is installed on the support plate 5 and is designed with a hole groove matching the needle roller bearing to ensure that the needle roller bearing can be accurately installed in place.

[0026] A raised positioning block 51 is provided in the middle of the support plate 5. This positioning block is used to be inserted into the lower port of the ball bearing press head 4 to provide additional positioning and support functions.

[0027] A through hole passing through the conical press head 3 is also provided in the middle of the support plate to facilitate the smooth progress of the press-fitting process.

[0028] A pressure sensor is installed inside the spring support rod 2 to monitor the pressure change during the press-fitting process in real time and transmit the data to the control system for processing.

[0029] The control system adjusts the thrust of the cylinder according to the feedback signal of the pressure sensor to ensure the accuracy and stability of the press-fitting.

[0030] When it is necessary to press-fit the needle roller bearing, first start the cylinders 1 of the upper press-fitting mechanism and the lower press-fitting mechanism; the cylinder pushes the conical press head 3 to move towards the ball bearing press head 4 through the spring support rod 2.

[0031] As the conical press head 3 gradually approaches, the needle roller bearing 6 is gradually pushed into the ball bearing press head 4; the 60° bevel angle design of the conical head makes the press-fitting process smoother, avoiding problems such as bearing damage or improper installation caused by sudden impact.

[0032] During the press-fitting process, the pressure sensor monitors the pressure change borne by the spring support rod 2 in real time;

[0033] The control system judges the press-fitting progress and status according to the feedback signal of the pressure sensor and adjusts the thrust of the cylinder in a timely manner to ensure the accuracy and stability of the press-fitting.

[0034] After the needle roller bearing 6 is fully pressed in place, the cylinder stops working and returns to its original position.

[0035] At this time, the installed steering rack needle roller bearing assembly can be taken out for subsequent assembly or testing work.

[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steering rack needle roller bearing pressing device, comprising an upper pressing mechanism and a lower pressing mechanism, characterized in that: The press-fitting mechanism comprises a cylinder (1), a spring support rod (2) connected to the cylinder (1), and a conical pressing head (3) connected to the front end of the spring support rod (2), wherein the conical pressing head (3) corresponds to a ball bearing pressing head (4) installed on the support plate (5), and a needle bearing (6) is sleeved on the conical pressing head (3), and the conical pressing head (3) pushes the needle bearing (6) to be installed inside the ball bearing pressing head (4), the upper press-fitting mechanism is installed above the support plate (5), and the lower press-fitting mechanism is installed below the support plate (5).

2. A steering rack needle roller bearing pressure device according to claim 1, characterized in that: The conical pressure head (3) comprises a support ring (31) fixed on the middle rod body, a positioning column (32) arranged in the middle of the upper end of the support ring (31), and a conical head (33) arranged at the upper end of the positioning column (32), wherein the head of the conical head (33) has an oblique angle of 60°, and the inner ring of the needle roller bearing (6) is larger than the diameter of the positioning column (32).

3. The steering rack needle roller bearing pressure device according to claim 1, characterized in that: The conical pressing heads (3) arranged on the upper pressing mechanism and the lower pressing mechanism are cylindrical structures made of magnetic material.

4. A steering rack needle roller bearing pressure device according to claim 2, characterized in that: The upper press-fitting mechanism and the lower press-fitting mechanism are installed on the same axis.

5. The steering rack needle roller bearing pressure device according to claim 1, characterized in that: A pressure sensor is installed inside the spring support rod (2).

6. The steering rack needle roller bearing pressure device according to claim 1, characterized in that: A raised positioning block (51) is provided in the middle of the support plate (5), and a through hole for passing the conical pressure head (3) is opened in the middle of the support plate (5), while the positioning block (51) is inserted into the lower port of the ball bearing pressure head (4).

Images