Universal joint shaft telescopic function testing device

Abstract

This utility model discloses a universal joint telescopic function testing device and method, including a positioning base frame forming a U-shaped spatial structure. Longitudinal stop platforms are fixedly arranged on both sides of the positioning base frame. A press platform is arranged on either side of the longitudinal stop platforms. The press platform and the positioning base frame are an integral structure. A press is detachably connected to the press platform. Connecting ends are symmetrically arranged on both outer ends of the positioning base frame. The connecting ends fix the positioning base frame to the positioning platform with bolts. The side of the U-shaped spatial structure formed by the positioning base frame away from the press platform is the universal joint placement space. Positioning columns are evenly distributed at intervals at the bottom of the positioning base frame. The positioning columns are cylindrical or rectangular structures, and the positioning columns are engaged with the evenly distributed mounting holes on the positioning platform in a plug-in manner.

Description

Technical Field

[0001] This utility model belongs to the field of universal rolling mill technology, specifically relating to a universal joint shaft telescopic function testing device. Background Technology

[0002] In large universal rolling mills in steel enterprises, universal joints adjust the roll pass through a telescopic function. However, due to long-term exposure to high dynamic loads, the telescopic parts are prone to locking failures or incomplete telescopic movement. Traditional methods rely on actual operation testing after the mill goes online, which has the following drawbacks: 1) Inability to predict faults: There is a lack of effective testing methods before going online, and once a fault is exposed, the mill must be shut down for replacement, affecting production efficiency. 2) Limited testing methods: Existing offline testing only verifies static pressure and cannot simulate the dynamic loads of actual working conditions, resulting in inaccurate test results.

[0003] In view of the above factors, a universal joint extension function testing device is provided, which is suitable for verifying the extension function of universal joints in universal rolling mills, so as to solve the problem of frequent replacements caused by extension failures after going online. Utility Model Content

[0004] The purpose of this invention is to provide a universal joint telescopic function testing device to solve the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved through the following technical solution: a universal joint telescopic function testing device, including a positioning base frame, the positioning base frame forming a U-shaped spatial structure, longitudinal stop platforms fixedly arranged on both sides of the positioning base frame, a press platform arranged on either side of the longitudinal stop platform, the press platform and the positioning base frame being an integral structure, and a press being detachably connected to the press platform;

[0006] The positioning base frame is provided with symmetrically fixed connecting ends on both sides of its outer end. The connecting ends are used to fix the positioning base frame to the positioning platform by bolts.

[0007] The U-shaped spatial structure formed by the positioning base frame provides a space for the universal joint on the side away from the press platform.

[0008] Furthermore, the bottom of the positioning base is provided with positioning posts evenly spaced apart. The positioning posts are cylindrical or rectangular in shape, and the positioning posts are engaged with the mounting holes evenly distributed on the positioning platform in a plug-in manner.

[0009] Furthermore, the press is a hydraulic jack.

[0010] Furthermore, a limiting plate is detachably connected to the longitudinal stop platform on the positioning base away from the press platform. The limiting plate has a shallow groove that engages with the cylindrical end of the universal joint.

[0011] Furthermore, the positioning base frame is provided with a support end, which includes a head / tail support section and a middle support section. The head / tail support sections are spaced apart on both sides of the positioning base frame, and the middle support section is located in the middle position of the universal joint shaft to support the middle connection shaft of the universal joint shaft.

[0012] Furthermore, the head / tail support section is a rectangular structure, and the contact position between the head / tail support section and the universal joint shaft is an arc-shaped surface structure;

[0013] The contact position between the intermediate support section and the universal joint shaft is an arc-shaped surface structure, and the width of the intermediate support section is greater than the width of the head / tail support sections.

[0014] Furthermore, a hydraulic cylinder lifting platform is provided at the bottom of the head / tail support section and the intermediate support section. The hydraulic cylinder lifting platform includes a hydraulic cylinder and a contact platform connected to the output end of the hydraulic cylinder. The contact platform is detachably connected to the head / tail support section and the intermediate support section.

[0015] Furthermore, the detachable connection between the contact platform and the head / tail support section and the intermediate support section is a bolted connection.

[0016] A method for applying a universal joint telescopic function testing device includes the following steps:

[0017] The universal joint shaft will be hoisted onto the positioning base frame using hoisting equipment. The positioning base frame will form a U-shaped spatial structure and sit on the head / tail support section and the middle support section.

[0018] Among them, a limiting plate is detachably connected to the longitudinal stop platform on the positioning base frame at the end away from the press platform. The limiting plate has a shallow groove that matches the cylindrical end of the universal joint.

[0019] Install the shaft clamping device that needs to be inspected onto the universal joint shaft and then perform the inspection. Extend the press on the testing device and fix it on the shaft head side of the universal joint shaft to confirm that the universal joint shaft will not retract.

[0020] Remove the shaft head clamping device, retract the universal joint to its original position, install the shaft head clamping device, and then use pressure to extend it and push against the other side of the universal joint to ensure that the universal joint does not extend.

[0021] With the press at one end and the other end adjusted according to the extension and retraction of the universal joint, when the universal joint is fully extended, it is necessary to test whether it will retract. At this point, place the stop at one end close to the universal joint, and extend the press at the other end to push against the universal joint, observing the movement. Figure 7Check if the spline position of the universal joint shaft changes. If it does not change, it is normal. If the spline position retracts, it means that the shaft head is not clamped and fixed.

[0022] To test whether the universal joint will extend in the retracted state, remove the press, fix one end of the universal joint to the stop with a steel wire rope, and hang a steel wire rope and guide chain on the other end to pull it. Check if the spline of the universal joint retracts changes. If there is no change, it is normal. If the spline is pulled out, it means that the shaft head is not clamped and fixed.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This utility model designs an offline testing method based on the telescopic function of a universal joint. Offline, the method tests the shaft head clamping function by clamping the shaft head onto the universal joint and fabricating a testing device to simulate the extended state of the universal joint. A press on the testing device extends and fixes itself to the shaft head side of the universal joint to confirm that the universal joint will not retract. The shaft head clamp is then removed, the universal joint is retracted to its original position, the shaft head is clamped and installed, and then pressure is applied to extend and press against the other side of the universal joint to ensure that the universal joint will not extend.

[0025] This invention allows for advance testing of spare parts to ensure their usability before deployment. It is applicable to the verification of the telescopic function of universal joint shafts in universal rolling mills, thus solving the problem of frequent replacements due to telescopic failures after deployment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the testing device of this utility model;

[0027] Figure 2 This is a utility model Figure 1 Enlarged view of a portion;

[0028] Figure 3 This is a schematic diagram of the head / tail support section of this utility model;

[0029] Figure 4 This is a schematic diagram of the intermediate support section of this utility model;

[0030] Figure 5 This is a schematic diagram of the ball bearing of this utility model;

[0031] Figure 6 This is a schematic diagram of the universal joint shaft head clamping device of this utility model installed at the position of the universal joint shaft;

[0032] Figure 7 This is a schematic cross-sectional view of the universal structure of this utility model;

[0033] Figure 8 This is an enlarged schematic diagram of the shaft head clamping and mounting position of this utility model;

[0034] Figure 9This is a schematic diagram of the shaft head clamping installation of this utility model;

[0035] Figure 10 This is a schematic diagram of the universal joint shaft of this utility model in the extended state;

[0036] Figure 11 This is a large schematic diagram of the universal joint shaft in the retracted state of this utility model;

[0037] Figure 12 This is a schematic diagram of the retaining sleeve of this utility model. Detailed Implementation

[0038] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] like Figure 1-12 As shown, a universal joint telescopic function testing device includes a positioning base frame 1, which forms a U-shaped spatial structure. Longitudinal stop platforms 2 are fixedly arranged on both sides of the positioning base frame 1. A press platform 3 is arranged on either side of the longitudinal stop platform 2. The press platform 3 and the positioning base frame 1 are an integral structure. A press 4 is detachably connected to the press platform 3.

[0042] The positioning base frame 1 has symmetrically fixed connecting ends 5 on both sides of its outer end. The connecting ends 5 fix the positioning base frame 1 to the positioning platform 6 by bolts.

[0043] The U-shaped spatial structure formed by the positioning base frame 1 has a space for placing universal joints on the side away from the press platform 3.

[0044] To facilitate the fixing of the positioning base frame 1 on the designated positioning platform during use, positioning posts 7 are evenly distributed at intervals on the bottom of the positioning base frame 1. The positioning posts 7 are cylindrical or rectangular in shape, and the positioning posts 7 are engaged with the mounting holes evenly distributed on the positioning platform 6 in a plug-in manner.

[0045] To facilitate the use of the press in axial direction to hold the universal joint shaft in place, the press 4 is a hydraulic jack.

[0046] To facilitate the use of the universal joint shaft, a limiting plate is set to fix one end of the universal joint shaft. The limiting plate 8 is detachably connected to the longitudinal stop platform 2 on the positioning base frame 1 at the end away from the press platform 3. The limiting plate 8 has a shallow groove 9 that cooperates with the cylindrical end of the universal joint shaft.

[0047] To facilitate support of the universal joint shaft at the bottom during use, the positioning base frame 1 is provided with a support end, which includes a head / tail support section 10 and a middle support section 11. The head / tail support sections 10 are spaced apart on both sides of the positioning base frame 1, and the middle support section 11 is located in the middle position of the universal joint shaft to support the middle connection of the universal joint shaft.

[0048] Among them, the head / tail support section 10 and the middle support section 11 are on the same horizontal line.

[0049] In order to facilitate the provision of a contact support surface during use, the head / tail support section 10 is configured with a rectangular structure, and the contact position between the head / tail support section 10 and the universal joint shaft is an arc-shaped surface structure;

[0050] Furthermore, the contact position between the head / tail support section 10 and the universal joint shaft is an arc-shaped surface structure with rolling balls.

[0051] The length of the head / tail support section 10 near the press is the same as the length of the universal joint end, to prevent the end position from tilting in the retracted state.

[0052] The contact position between the intermediate support section 11 and the universal joint shaft is an arc-shaped surface structure, and the width of the intermediate support section 11 is greater than the width of the head / tail support section 10.

[0053] Furthermore, the contact position between the intermediate support section 11 and the universal joint shaft is an arc-shaped surface structure with rolling balls installed on it.

[0054] To facilitate height adjustment via the hydraulic cylinder lifting platform 12 during use, thereby ensuring the universal joint shaft is coaxial with the press, a hydraulic cylinder lifting platform 12 is provided at the bottom of the head / tail support section 10 and the intermediate support section 11. The hydraulic cylinder lifting platform 12 includes a hydraulic cylinder 13 and a contact platform 14 connected to the output end of the hydraulic cylinder 13. The contact platform 14 is detachably connected to the head / tail support section 10 and the intermediate support section 11.

[0055] To facilitate disassembly and replacement during use, the contact platform 14 is detachably connected to the head / tail support section 10 and the intermediate support section 11 by bolts.

[0056] A method for applying a universal joint telescopic function testing device includes the following steps:

[0057] The universal joint shaft will be hoisted onto the positioning base frame using hoisting equipment. The positioning base frame will form a U-shaped spatial structure and sit on the head / tail support section and the middle support section.

[0058] Among them, a limiting plate is detachably connected to the longitudinal stop platform on the positioning base frame at the end away from the press platform. The limiting plate has a shallow groove that matches the cylindrical end of the universal joint.

[0059] Install the shaft clamping device that needs to be inspected onto the universal joint shaft and then perform the inspection. Extend the press on the testing device and fix it on the shaft head side of the universal joint shaft to confirm that the universal joint shaft will not retract.

[0060] Remove the shaft head clamping device, retract the universal joint to its original position, install the shaft head clamping device, and then use pressure to extend it and push against the other side of the universal joint to ensure that the universal joint does not extend.

[0061] With the press at one end and the other end adjusted according to the extension and retraction of the universal joint, when the universal joint is fully extended, it is necessary to test whether it will retract. At this point, place the stop at one end close to the universal joint, and extend the press at the other end to push against the universal joint, observing the movement. Figure 7 Check if the spline position of the universal joint shaft changes. If it does not change, it is normal. If the spline position retracts, it means that the shaft head is not clamped and fixed.

[0062] To test whether the universal joint will extend in the retracted state, remove the press, fix one end of the universal joint to the stop with a steel wire rope, and hang a steel wire rope and guide chain on the other end to pull it. Check if the spline of the universal joint retracts changes. If there is no change, it is normal. If the spline is pulled out, it means that the shaft head is not clamped and fixed.

[0063] Shaft head clamping device installation Figure 6 On the universal joint shaft, the specific assembly structure is that the shaft head clamping device is installed... Figure 7The shaft head clamping and mounting position on the universal joint spline sleeve. Figure 8 Enlarged diagram of the shaft head clamping installation position. Figure 9 The central shaft head clamping mounting convex surface and Figure 7 The upper shaft head of the retaining sleeve is clamped and installed with a concave surface to ensure that the universal joint shaft will not retract after the fit is made.

[0064] according to Figure 10 , Figure 11 These represent the extended and retracted states of the universal joint, respectively. Regardless of the selected state, the universal joint can normally transmit torque. However, if it is in the extended state during operation... Figure 10 If the spline of the universal joint shaft suddenly retracts, it will cause the universal joint shaft to detach from the contact part of the roll, resulting in the roll being unable to operate and unable to roll the steel billet normally.

[0065] If it appears Figure 11 If the spline of the universal joint shaft changes position or suddenly extends during operation, it will cause the universal joint shaft to fail to maintain dynamic balance, resulting in roll vibration and inability to operate normally during rolling.

[0066] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A universal joint shaft telescoping function testing device, characterized by: Includes a positioning base frame (1), which forms a U-shaped spatial structure. Longitudinal stop platforms (2) are fixedly installed on both sides of the positioning base frame (1). A press platform (3) is installed on either side of the longitudinal stop platform (2). The press platform (3) and the positioning base frame (1) are an integral structure. A press (4) is detachably connected to the press platform (3). The positioning base frame (1) has symmetrically fixed connecting ends (5) on both sides of its outer end. The connecting ends (5) fix the positioning base frame (1) to the positioning platform (6) by bolts. The U-shaped spatial structure formed by the positioning base frame (1) is a space for placing universal joints on the side away from the press platform (3).

2. The universal joint telescopic function testing device according to claim 1, characterized in that: The bottom of the positioning base frame (1) is provided with positioning posts (7) evenly spaced. The positioning posts (7) are cylindrical or rectangular structures. The positioning posts (7) are connected to the mounting holes evenly distributed on the positioning platform (6) by plugging in.

3. The universal joint telescopic function testing device according to claim 2, characterized in that: The press (4) is a hydraulic jack.

4. The universal joint telescopic function testing device according to claim 3, characterized in that: A limiting plate (8) is detachably connected to the longitudinal stop platform (2) on the positioning base frame (1) at the end away from the press platform (3). The limiting plate (8) has a shallow groove (9) that engages with the cylindrical end of the universal joint.

5. The universal joint telescopic function testing device according to claim 4, characterized in that: The positioning base (1) is provided with a support end, which includes a head / tail support section (10) and a middle support section (11). The head / tail support sections (10) are spaced apart on both sides of the positioning base (1), and the middle support section (11) is located in the middle position of the universal joint shaft to support the middle connection shaft of the universal joint shaft.

6. The universal joint telescopic function testing device according to claim 5, characterized in that: The head / tail support section (10) is a rectangular structure, and the contact position between the head / tail support section (10) and the universal joint shaft is an arc-shaped surface structure; The contact position between the intermediate support section (11) and the universal joint shaft is an arc-shaped surface structure, and the width of the intermediate support section (11) is greater than the width of the head / tail support section (10).

7. The universal joint telescopic function testing device according to claim 6, characterized in that: A hydraulic cylinder lifting platform (12) is provided at the bottom of the head / tail support section (10) and the middle support section (11). The hydraulic cylinder lifting platform (12) includes a hydraulic cylinder (13) and a contact platform (14) connected to the output end of the hydraulic cylinder (13). The contact platform (14) is detachably connected to the head / tail support section (10) and the middle support section (11).

8. The universal joint telescopic function testing device according to claim 7, characterized in that: The detachable connection between the contact platform (14), the head / tail support section (10), and the intermediate support section (11) is a bolt connection.

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