A floating pressure cap

Abstract

This utility model belongs to the field of pressure cap technology and discloses a floating pressure cap, including a pressure cap and several guide sleeves disposed within the pressure cap. A centering pin is disposed within each guide sleeve, with one end of the centering pin fixedly connected to the guide sleeve and the other end passing through the power take-off gear shaft of an engine to abut against a self-aligning ball bearing. A connecting member is disposed along the circumferential direction of the guide sleeve, passing through the guide sleeve and fixedly connected to the pressure cap. The centering pin abuts against the self-aligning ball bearing. Under the drive of a press, the shaft is pressed into the deep groove ball bearing. When the pressure reaches a set value, the pressing stops. If the self-aligning ball bearing experiences radial displacement due to installation errors or load changes, the centering pin can slide slightly within the guide sleeve in the direction of displacement of the self-aligning ball bearing, causing the pressure cap to adjust its position synchronously. This avoids rigid friction between the pressure cap and the outer ring of the self-aligning ball bearing, ensuring the normal self-aligning function of the self-aligning ball bearing and extending the service life of the pressure cap and the shaft.

Description

Technical Field

[0001] This utility model belongs to the field of capping technology and relates to a floating capping device. Background Technology

[0002] As one of the core functional components of an engine, the assembly quality of the power take-off (PTO) directly affects the overall performance and reliability of the machine. During the assembly process, especially the assembly process with the engine housing, it is essential to ensure that the PTO shaft system components are accurately positioned and fully press-fitted into place. Otherwise, serious malfunctions such as abnormal transmission noise, uneven bearing wear, or even equipment shutdown may occur.

[0003] Taking a Cummins engine power take-off (PTO) as an example, a self-aligning ball bearing needs to be pre-pressed onto the PTO shaft. During the assembly stage, the shaft and bearing must be press-fitted into the housing as a whole. Due to the inherent structural characteristics of the self-aligning ball bearing, the outer ring can rotate freely along the axial direction. When using traditional rigid tooling for press-fitting, when the bearing outer ring first contacts the housing end face, it is very easy for uneven force to occur on the bearing outer ring due to factors such as the fixed force application point of the tooling and slight deviations between the housing and bearing mating surfaces, leading to tilting and displacement. This not only prevents the press-fitting force from being evenly transmitted axially, causing problems such as abnormal assembly clearance between the PTO shaft and housing and insufficient press-fitting depth, but may also scratch the inner wall of the housing or the outer ring of the bearing, creating potential hazards for future failures.

[0004] To solve the above problems, manual intervention or secondary pressing operations are often relied upon: manual intervention requires operators to observe the bearing posture in real time during the pressing process, and correct the tilt by manually fine-tuning the tooling position or applying auxiliary external force. This not only requires high experience from the operators, but also has low adjustment efficiency and is difficult to adapt to the needs of mass production. Secondary pressing requires testing the assembly accuracy after the first pressing is completed, and unqualified parts are disassembled and repressed. This not only increases labor costs, but also easily leads to a decrease in the accuracy of parts fitting due to repeated assembly, making it difficult to ensure the overall assembly consistency. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a floating pressure cap.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a floating pressure cap, including a pressure cap and a plurality of guide sleeves disposed inside the pressure cap. A centering pin is disposed inside the guide sleeve. One end of the centering pin is fixedly connected to the guide sleeve, and the other end passes through the power take-off gear shaft of the engine to abut against the self-aligning ball bearing. A connecting member is disposed along the circumferential direction of the guide sleeve. The connecting member passes through the guide sleeve and is fixedly connected to the pressure cap.

[0008] Furthermore, a fastener is provided on the side of the guide sleeve near the axis of the pressure cap. The fastener passes through the guide sleeve and is fixedly connected to the centering pin. A fixing member is provided on the end of the fastener away from the centering pin.

[0009] Furthermore, a sealing element is fitted onto one end of the centering pin near the connector, and the sealing element is fixedly connected to the guide sleeve.

[0010] Furthermore, the self-aligning ball bearing is disposed within the housing, the inner wall of the self-aligning ball bearing is fixedly connected to the power take-off gear shaft of the engine, the outer wall is fixedly connected to the housing, and the self-aligning ball bearing is detachably connected to the housing.

[0011] Furthermore, a deep groove ball bearing is also provided inside the housing, and the inner sidewall of the deep groove ball bearing is fixedly connected to the power take-off gear shaft of the engine; the deep groove ball bearing is located at the lower end of the self-aligning ball bearing.

[0012] Furthermore, the axis of the centering pin is collinear with the outer wall of the self-aligning ball bearing.

[0013] Furthermore, the fastener and the fixing member are detachably connected.

[0014] Furthermore, the fastener is a fastening screw, the fixing member is a nut, and the connecting member is a screw.

[0015] Furthermore, the fastener is larger than the connector, and the fastener is adapted to the fixing member.

[0016] Furthermore, the sealing element is a rectangular spring.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] This utility model discloses a floating pressure cap, in which a centering pin is set inside a guide sleeve. One end of the centering pin is fixedly connected to the guide sleeve, and the other end passes through the power take-off gear shaft of the engine and abuts against the self-aligning ball bearing. This allows for precise positioning of the self-aligning ball bearing. During the pressing process, it ensures that the outer ring of the self-aligning ball bearing is evenly stressed, avoiding tilting and displacement. This effectively solves the problem of incomplete pressing in traditional pressing methods, significantly improves the assembly qualification rate, reduces rework and scrap caused by assembly defects, and lowers production costs.

[0019] This utility model discloses a floating pressure cap in which a centering pin abuts against a self-aligning ball bearing. During the pressing process, the centering pin provides support for the self-aligning ball bearing, maintaining the correct position and posture throughout the pressing process, thereby improving the coaxiality of the pressing. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of a floating pressure cap according to the present invention;

[0021] Figure 2 This is a top view of a floating pressure cap according to the present invention.

[0022] Figure label:

[0023] 1-Centering pin; 2-Guide sleeve; 3-Gland; 4-Connector; 5-Fixing component; 6-Fastener; 7-Seal; 8-Self-aligning ball bearing; 9-Housing. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] Example 1

[0026] This utility model discloses a floating pressure cap, including a pressure cap 3 and a plurality of guide sleeves 2 disposed within the pressure cap 3. A centering pin 1 is disposed within the guide sleeve 2, one end of which is fixedly connected to the guide sleeve 2, and the other end passes through the power take-off gear shaft of the engine to abut against the self-aligning ball bearing 8. A connecting member 4 is disposed along the circumferential direction on the guide sleeve 2, and the connecting member 4 passes through the guide sleeve 2 and is fixedly connected to the pressure cap 3.

[0027] Specifically, such as Figure 1 As shown, the floating gland includes a centering pin 1, a guide sleeve 2, a gland 3, a connector 4, a fixing component 5, a fastener 6, and a seal 7, which cooperate with a self-aligning ball bearing 8, a housing 9, and a deep groove ball bearing. The overall structure adopts an axisymmetric design to ensure uniform force distribution.

[0028] A plurality of guide sleeve mounting holes are evenly arranged circumferentially on the upper end surface of the pressure cap 3. The diameter of the guide sleeve mounting holes is adapted to the guide sleeve 2 to ensure the positioning accuracy of the guide sleeve 2 within the mounting holes. In this embodiment, the number of guide sleeves 2 is 4, such as... Figure 2 As shown.

[0029] The outer wall of the guide sleeve 2 is provided with a boss, and a threaded hole is opened on the boss. It is fixedly connected to the pressure cap 3 through the connector 4. In this embodiment, the connector 4 is a screw. During assembly, the connector 4 passes through the guide sleeve 2 from bottom to top and is detachably connected to the pressure cap 3, specifically by a threaded connection. The guide sleeve 2 is evenly distributed along the circumference, which can make the force of the pressure cap 3 on the self-aligning ball bearing 8 evenly transmitted, avoiding component damage caused by local stress concentration.

[0030] A seal 7 and a centering pin 1 are installed inside the guide sleeve 2. The seal 7 is installed on the outer wall of one end of the centering pin 1, and the other end of the centering pin 1 passes through the engine power take-off gear shaft and abuts against the deep groove ball bearing. It should be noted that the axis of the centering pin 1 is collinear with the outer wall of the self-aligning ball bearing 8 to ensure accurate positioning of the self-aligning ball bearing 8 by the centering pin 1 and avoid uneven force due to axis misalignment. In this embodiment, the seal 7 is a rectangular spring. The rectangular spring not only has a good sealing effect, but also provides a certain elastic compensation when the centering pin 1 undergoes slight displacement, further improving the self-adaptive capability of the floating gland.

[0031] A fastener 6 is provided on the side of the guide sleeve 2 near the axis of the pressure cap 3. The fastener 6 passes through the guide sleeve 2 and is fixedly connected to the centering pin 1. A fixing member 5 is provided at the end of the fastener 6 away from the centering pin 1. The position of the centering pin 1 is adjusted by the fixing member 5 and the fastener 6 to ensure that the axis of the centering pin 1 is in a straight line with the outer wall of the deep groove ball bearing. Figure 1 As shown.

[0032] In this embodiment, the fastener 6 is a fastening screw and the fixing part 5 is a nut, which is fixed by threaded engagement. At the same time, the size of the fastener 6 is larger than that of the connecting part 4, and the fastener 6 is compatible with the fixing part 5 to ensure that the fixing strength of the fastener 6 to the centering pin 1 is higher than that of the connecting part 4 to the guide sleeve 2, so as to avoid the centering pin 1 loosening due to the failure of the fastener 6 first under stress.

[0033] During assembly, the sealing element 7 is first fitted onto the centering pin 1, and the centering pin 1 with the sealing element 7 is fixedly installed inside the guide sleeve 2. Then, one end of the guide sleeve 2 is passed through the guide sleeve mounting hole, and the guide sleeve 2 is fixedly connected to the pressure cap 3 through the connector 4. The centering pin 1 is fixed by the fastener 6 and the fixing element 5. The lower end of the centering pin passes through the engine power take-off gear shaft and abuts against the deep groove ball bearing. Under the drive of the press, the shaft is pressed into the deep groove ball bearing. The press is equipped with a pressure sensor. When the set value is reached, the pressing stops. In this embodiment, the set value is 2T, and it is adjusted accordingly according to the actual situation.

[0034] The self-aligning ball bearing 8 is housed within the housing 9, with its inner wall fixedly connected to the shaft and its outer wall fixedly connected to the housing 9. The self-aligning ball bearing 8 is detachably connected to the housing 9 for easy maintenance and replacement. The gland 3 abuts against the self-aligning ball bearing 8 via a centering pin 1, achieving axial positioning of the self-aligning ball bearing 8. Simultaneously, the clearance fit between the centering pin 1 and the guide sleeve 2 accommodates slight radial displacement of the self-aligning ball bearing 8 during operation.

[0035] When the self-aligning ball bearing 8 experiences radial displacement due to installation errors or load changes, the centering pin 1 can slide slightly within the guide sleeve 2 in the direction of displacement of the self-aligning ball bearing 8, causing the pressure cap 3 to adjust its position synchronously, thus preventing rigid friction between the pressure cap 3 and the outer ring of the self-aligning ball bearing 8. This ensures the normal self-aligning function of the self-aligning ball bearing 8 and extends the service life of the pressure cap 3 and the shaft.

[0036] A deep groove ball bearing is also installed inside the housing 9. The inner wall of the deep groove ball bearing is fixedly connected to the power take-off gear shaft of the engine and is located at the lower end of the self-aligning ball bearing 8. Together with the self-aligning ball bearing 8, it bears the radial and axial loads of the equipment. The deep groove ball bearing has good radial load-bearing capacity and can help the self-aligning ball bearing 8 to distribute the load and improve the stability of the transmission.

[0037] Example 2

[0038] This utility model discloses a method for using a floating pressure cap:

[0039] The deep groove ball bearing is fixedly installed inside the housing 9, and the self-aligning ball bearing 8 is installed at the upper end of the housing 9. The self-aligning ball bearing 8 and the housing 9 are detachably fixedly connected.

[0040] The sealing element 7 is fitted onto the centering pin 1 and installed on the outer wall of one end of the centering pin 1. The sealing element 7 is a rectangular spring, which not only has a good sealing effect, but also provides a certain elastic compensation when the centering pin 1 undergoes slight displacement, further improving the self-adaptive capability of the floating gland. The centering pin 1 with the sealing element 7 is fixedly installed in the guide sleeve 2 to ensure that the axis of the centering pin 1 is collinear with the outer wall of the self-aligning ball bearing 8, thereby achieving precise positioning and avoiding uneven force due to axis misalignment.

[0041] One end of the guide sleeve 2 with the centering pin 1 is passed through guide sleeve mounting holes evenly distributed circumferentially on the upper surface of the pressure cap 3. The diameter of the guide sleeve mounting holes is adapted to the guide sleeve 2, ensuring the positioning accuracy of the guide sleeve 2 within the mounting holes. In this embodiment, there are four guide sleeves 2, which are evenly distributed circumferentially, allowing the pressure cap 3 to evenly transmit the force on the self-aligning ball bearing 8, avoiding component damage caused by local stress concentration. A boss is provided on the outer wall of the guide sleeve 2, and a threaded hole is provided on the boss. A connecting piece 4 passes through the guide sleeve 2 from bottom to top and is threadedly and detachably connected to the pressure cap 3, thereby fixing the guide sleeve 2 and the pressure cap 3.

[0042] On the side of the guide sleeve 2 closest to the axis of the pressure cap 3, a fastener 6 is used to pass through the guide sleeve 2 and fix it to the centering pin 1. Then, a fixing member 5 is installed on the end of the fastener 6 away from the centering pin 1, and the fastener is fixed by threaded engagement. The position of the centering pin 1 is adjusted by the fixing member 5 and the fastener 6 to ensure that the axis of the centering pin 1 is in the same straight line as the outer wall of the deep groove ball bearing. At the same time, the size of the fastener 6 is larger than that of the connecting member 4, and the fastener 6 is compatible with the fixing member 5 to ensure that the fixing strength of the fastener 6 to the centering pin 1 is higher than that of the connecting member 4 to the guide sleeve 2, so as to avoid the centering pin 1 loosening due to the failure of the fastener 6 first under stress.

[0043] After the centering pin 1 is fixed, its lower end passes through the engine power take-off gear shaft, and the shaft is pressed into the deep groove ball bearing under the drive of the press. The press is equipped with a pressure sensor that monitors the pressure in real time during the pressing process. When the pressure reaches the set value, the pressing stops. When the self-aligning ball bearing 8 experiences radial displacement due to installation errors or load changes, the centering pin 1 can slide slightly within the guide sleeve 2 in the direction of displacement of the self-aligning ball bearing 8, causing the pressure cap 3 to adjust its position synchronously, preventing rigid friction between the pressure cap 3 and the outer ring of the self-aligning ball bearing 8. This ensures the normal self-aligning function of the self-aligning ball bearing 8 and extends the service life of the pressure cap 3 and the shaft. Simultaneously, the deep groove ball bearing and the self-aligning ball bearing 8 share the radial and axial loads of the equipment. The deep groove ball bearing has excellent radial load-bearing capacity, which helps the self-aligning ball bearing 8 distribute the load and improve transmission stability.

[0044] Since the self-aligning ball bearing 8 is detachably connected to the housing 9, if maintenance or replacement of the self-aligning ball bearing 8 is required during later use, the corresponding operation can be performed.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

Claims

1. A floating pressure cap, characterized in that: It includes a pressure cap (3) and several guide sleeves (2) disposed inside the pressure cap (3). A centering pin (1) is disposed inside the guide sleeve (2). One end of the centering pin (1) is fixedly connected to the guide sleeve (2), and the other end passes through the power take-off gear shaft of the engine to abut against the self-aligning ball bearing (8). A connecting piece (4) is disposed along the circumferential direction of the guide sleeve (2). The connecting piece (4) passes through the guide sleeve (2) and is fixedly connected to the pressure cap (3).

2. The floating pressure cap according to claim 1, characterized in that: The guide sleeve (2) is provided with a fastener (6) on the side near the axis of the pressure cap (3). The fastener (6) passes through the guide sleeve (2) and is fixedly connected to the centering pin (1). The end of the fastener (6) away from the centering pin (1) is provided with a fixing member (5).

3. The floating pressure cap according to claim 1, characterized in that: The centering pin (1) is fitted with a sealing element (7) at one end near the connector (4), and the sealing element (7) is fixedly connected to the guide sleeve (2).

4. The floating pressure cap according to claim 3, characterized in that: The self-aligning ball bearing (8) is disposed inside the housing (9). The inner side wall of the self-aligning ball bearing (8) is fixedly connected to the power take-off gear shaft of the engine, and the outer side wall is fixedly connected to the housing (9). The self-aligning ball bearing (8) and the housing (9) are detachably connected.

5. The floating pressure cap according to claim 4, characterized in that: The housing (9) is also provided with a deep groove ball bearing, and the inner sidewall of the deep groove ball bearing is fixedly connected to the power take-off gear shaft of the engine. The deep groove ball bearing is located at the lower end of the self-aligning ball bearing (8).

6. The floating pressure cap according to claim 1, characterized in that: The axis of the centering pin (1) is collinear with the outer wall of the self-aligning ball bearing (8).

7. The floating pressure cap according to claim 2, characterized in that: The fastener (6) is detachably connected to the fixing member (5).

8. The floating pressure cap according to claim 7, characterized in that: The fastener (6) is a fastening screw, the fixing member (5) is a nut, and the connecting member (4) is a screw.

9. The floating pressure cap according to claim 8, characterized in that: The fastener (6) is larger than the connector (4), and the fastener (6) is adapted to the fixing member (5).

10. The floating pressure cap according to claim 3, characterized in that: The sealing element (7) is a rectangular spring.

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