A slider-type universal joint lubrication device

Abstract

This invention relates to a sliding block type universal joint shaft lubrication device. The lubrication device includes a drive shaft, copper sliding blocks, a flat head sleeve, and a joint sleeve. Two copper sliding blocks are connected and mounted on the drive shaft by sliding block pins. One end of the joint sleeve is integrally fitted onto the outer circumference of the drive shaft, and the other end is fitted onto the outer circumference of the flat head sleeve. One end of the flat head sleeve is fitted onto the roll journal, and the other end is inserted between the two copper sliding blocks. This technical solution is suitable for bearing lubrication of hot-rolled sliding block type universal drive shafts. The bearing pair uses a thin oil bath lubrication with cooling effect, and it eliminates the need for a flat head sleeve clamping device, requires no manual intervention during roll changing, and ensures that it does not affect the loading and unloading of rolls. This solution mainly achieves functions such as oil storage, oil carrying, oil spraying, sealing, universal swing, locking, and synchronization.

Description

Technical Field

[0001] This invention relates to a lubrication device, specifically a slider-type universal joint lubrication device, belonging to the field of lubrication technology in the field of hot continuous rolling mill mechanical transmission. Background Technology

[0002] The sliding universal joint shaft in a steel rolling mill is a key transmission component of the roughing mill. It typically consists of two shafts used in pairs, upper and lower, with copper sliding blocks installed at both ends. These blocks act as bearings, transmitting torque. Due to the larger space available, the motor-side sliding block is usually lubricated using an oil bath or oil sump, providing good lubrication and a service life of over two years. However, the roll-side sliding block, due to space constraints, variations in the loading and unloading rolls, and roll gap changes, can only be lubricated manually at regular intervals or via automatic conveying methods such as rotary joints. This method has several drawbacks in practical use: 1. The lubricating oil cannot be effectively stored due to mill cooling and descaling water application; 2. Only high-viscosity greases can be used for conveying the lubricating oil, and it lacks cooling effect; 3. The sliding block's service life is generally only about 3-6 months.

[0003] Patents related to this case include: CN202461113U - Thin oil lubrication device for copper slider on roll side, CN201959983U - Lubrication device for slider universal joint of medium and heavy plate rolling mill, and CN102211112A - A lubrication system for slider universal joint of medium and heavy plate steel rolling mill. Although the above cases achieve thin oil lubrication, the disadvantage is that they are not suitable for reversible rolling mills. When the roll gap changes significantly, a large amount of water and iron oxide scale will enter the lubricating oil, and the critical flat head sleeve clamping device is indispensable. Therefore, there is an urgent need for a new solution to solve the above technical problems. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by providing a sliding block universal joint lubrication device. This technical solution is suitable for bearing lubrication of hot-rolled sliding block universal drive shafts. The bearing pair uses a thin oil bath lubrication with cooling effect, and it does not require a flat head sleeve clamping device, the roll changing process does not require manual intervention, and it ensures that it does not affect the loading and unloading rolls. This solution mainly realizes functions such as oil storage, oil carrying, oil spraying, sealing, universal swing, locking, and synchronization.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a slider-type universal joint lubrication device, characterized in that the lubrication device includes a drive shaft, a copper slider, a flat head sleeve, and a joint sleeve; two copper sliders are connected and installed on the drive shaft by slider pins; one end of the joint sleeve is integrally fitted onto the outer circle of the drive shaft, and the other end is fitted onto the outer circle of the flat head sleeve; one end of the flat head sleeve is fitted onto the journal of the roll shaft, and the other end is inserted between the two copper sliders.

[0006] The bushing includes a bushing housing, an inflatable seal, a screw plug, a T-shaped rib, a limiting fork, a limiting screw, a bushing, an internal hexagonal screw, a base plate, an external gear, a crank, a connecting rod, a tension spring, a bearing, an insert, an inner ring, and an O-ring. Four limiting forks are mounted on the bushing, and corresponding limiting screws are mounted on the end face of the housing. The bushing rotates synchronously with the drive shaft. The inner ring is connected to the bushing 206 via an internal hexagonal screw. The O-ring is mounted on the concave spherical surface of the housing for sealing. Two inserts are respectively mounted at the horizontal ends of the concave spherical surface of the housing. The base plate, external gear, crank, connecting rod, bearing, and insert are connected via... The hex socket screws are installed on the two planes of the inner ring's inner hole; the bushing housing is a cylindrical structure with a sealing groove at one end for installing an air seal; the inner side of the other end is a concave spherical surface with two notches in the horizontal direction for installing two corresponding removable inserts, and several teeth at the upper and lower ends of the vertical direction of the concave spherical surface. Four T-shaped ribs are designed in the middle of the cylindrical structure and at the upper and lower ends of the corresponding slider. A screw plug is installed at the top and bottom of the bushing housing, so the inner diameter of the bushing is 0.15mm smaller than the outer diameter of the drive shaft. The two are interference-fitted and heat-fitted.

[0007] The inner ring has an outer circle designed as a convex spherical surface that mates with the housing of the bushing, with a square through hole at the top and bottom. The inner ring also has a plane at the top and bottom with several threaded holes evenly distributed on the plane. A threaded hole is also designed on one side of the inner ring.

[0008] The convex spherical surface of the inner ring and the concave spherical surface of the mating bushing housing are assembled to form a swingable spherical bearing. Its width, radius of curvature and other parameters must meet the 11-degree design requirement, that is, the outer ring remains horizontal and stationary, and the inner ring swings at least 5.5 degrees on one side.

[0009] The installation steps for the bushing are as follows:

[0010] Step 1) Install the base plate, external gear, crank, connecting rod, bearing, and insert into the two planes of the inner ring hole using hex socket screws. Do not install the tension spring for the time being.

[0011] Step 2) Install the O-ring in place, and place the cylindrical bushing housing vertically (with the axis perpendicular to the ground) with the concave spherical surface on top;

[0012] Step 3) Lift the inner ring horizontally, that is, make the inner hole axis parallel to the ground and the end face perpendicular to the ground.

[0013] Step 4) Move the inner ring to the top of the bushing housing and align it with the notch. Slowly lower it. When the outer convex spherical surface of the inner ring can engage with the concave spherical surface of the bushing housing, rotate the inner ring 90 degrees around the inner hole axis of the bushing housing. At this time, the inner ring and the two spherical surfaces of the bushing housing 200 are in mutual cooperation.

[0014] Step 5) Install the insert to completely fill the concave spherical notch on the bushing housing;

[0015] Step 6) Rotate the inner ring another 90 degrees so that the axes of the two inner holes of the inner ring and the bushing housing coincide;

[0016] Step 7) Install the tension spring, under its action, the external teeth mesh with the teeth on the concave spherical surface of the bushing housing;

[0017] Step 8) Rotate the assembled housing 90 degrees so that the axis is parallel to the ground; install the inflatable seal in place, and install the assembled connecting sleeve onto the main shaft. The main steps are as follows:

[0018] Step 1: Install the bushing onto the corresponding part of the drive shaft by heating and expanding it. After cooling, the two will become one.

[0019] Step 2: Connect the inner ring of the bushing to the bushing using bolts.

[0020] Step 3: Install the limit fork and limit screw.

[0021] Step 4: Because the inner ring and the bushing housing have a spherical fit, the bushing housing is in a downward-pressed state under its own weight, meaning its axis forms a certain angle with the horizontal line. Adjust the bushing housing to be level, install the tension spring, and under the tension of the spring, the external teeth mesh with the teeth on the concave spherical surface of the bushing housing, keeping the axis of the bushing housing horizontal.

[0022] Step 5: Slowly push the flat-head sleeve horizontally into the bushing. The flat-head sleeve will first contact the bearing, then continue forward, pushing the crank and connecting rod to overcome the tension of the tension spring and disengage the outer teeth from the teeth on the concave spherical surface of the bushing housing. The inner ring can then swing within a certain range from the spherical surface of the bushing housing.

[0023] Step Six: After the flat cap is installed, slowly inflate the air seal until the sealing lip at the bottom contacts the flat cap.

[0024] Step 7: Remove the plug at the upper end of the bushing, inject thin oil into one-quarter of the cavity, and reinstall the plug.

[0025] Step 8: Rotate the drive shaft at low speed and observe the contact area between the air-filled seal lip and the flat head sleeve. If thin oil overflows, continue to inflate the air-filled seal until no more oil overflows.

[0026] Compared with existing technologies, this invention has the following advantages: This technical solution solves the industry problem that the roller-side slider cannot be lubricated with a thin oil bath. The ingenious use of an air-filled seal prevents the thin oil inside from overflowing and also blocks external sewage from entering the oil storage area, preventing contamination of the thin oil. Simultaneously, the soft sealing lip can compensate for the vertical positional error of the flat head sleeve. Specific effects and functions are as follows: 1) Oil-carrying function: The partition designed inside the bushing forms a small oil storage cavity, and the rotating bushing carries the lubricating thin oil to the top. 2) Oil-spraying function: When the partition rotates above the slider, the lubricating oil in the cavity is sprayed by its own weight. 3) Sealing function: The two ends of the horizontally installed connecting sleeve are designed with seals, and the roller end uses a relatively soft inflatable seal. The appropriate air pressure is selected to ensure the sealing effect. 4) Universal swing: The transmission end of the connecting sleeve is designed with a spherical bearing structure with universal swing function, which can solve the problem of the tilt angle rotation of the transmission shaft. 5) Locking function: The locking structure inside the connecting sleeve can ensure that the connecting sleeve is in a horizontal state after the roller is pulled out, which is ready for the next step of roller installation. After the roller is installed, the flat head sleeve can open the locking mechanism to ensure the universal swing function. 6) Synchronization effect: The inner and outer rings with the function of spherical bearings are synchronized in the circumferential direction. Attached Figure Description

[0027] Figure 1 This is a front cross-sectional view of the background technology of the present invention;

[0028] Figure 2 for Figure 1 EE sectional view;

[0029] Figure 3 for Figure 1 Enlarged view of part I;

[0030] Figure 4 for Figure 1 Enlarged view of part II;

[0031] Figure 5 A simplified schematic diagram of the bushing assembly;

[0032] Figure 6 for Figure 5 DD sectional view;

[0033] Figure 7 for Figure 5 EE sectional view;

[0034] Figure 8 for Figure 5 3D diagram;

[0035] Figure 9 for Figure 5 Enlarged view of part III;

[0036] Figure 10 for Figure 7 Enlarged view of part IV in the middle;

[0037] Figure 11 This is a diagram of the inner ring assembly;

[0038] Figure 12 for Figure 11 AA section view;

[0039] Figures 13-15 This is a schematic diagram of different sides of the inner ring.

[0040] In the diagram: 101-Drive shaft, 102-Slider pin, 103-Connecting bushing assembly, 104-Flat head sleeve, 105-Copper slider, 200-Connecting bushing housing, 201-Air seal, 202-Plug, 203-Inner ring, 204-Limit fork, 205-Limit screw, 206-Bushing sleeve, 207-Hex socket head cap screw, 208-Base plate, 209-External gear, 210-Crank, 211-Connecting rod, 212-Tension spring, 213-Bearing, 214-Oil reservoir rib plate, 215-Inner ring, 216-O-ring. Detailed Implementation

[0041] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0042] Example 1: See Figures 1-15A sliding block type universal joint lubrication device is disclosed. The lubrication device includes a drive shaft 101, copper sliding blocks 105, a flat head sleeve 104, and a joint sleeve 103. Two copper sliding blocks 105 are connected by sliding block pins 102 and installed in the jaw of the drive shaft 101. One end of the joint sleeve 103 is integrally fitted on the outer circle of the jaw of the drive shaft 101, and the other end is fitted on the outer circle of the flat head sleeve 104. One end of the flat head sleeve 104 is fitted on the journal of the roll shaft, and the other end is inserted between the two copper sliding blocks 105. The bushing 103 includes a bushing housing 200, an inflatable seal 201, a screw plug 202, a T-shaped rib 203, a limiting fork 204, a limiting screw 205, a bushing 206, an internal hexagon screw 207, a base plate 208, an external gear 209, a crank 210, a connecting rod 211, a tension spring 212, a bearing 213, an insert 214, an inner ring 215, and an O-ring 216. Four limiting forks 204 are mounted on the bushing 206, and corresponding limiting screws 205 are mounted on the end face of the housing 200. The bushing 206 rotates synchronously relative to the drive shaft 101. The inner ring 215 is connected to the bushing 206 via the internal hexagon screw 207. The O-ring 216 is mounted on the concave spherical surface of the housing 200, serving a sealing function. Two inserts 214 are respectively installed at the two horizontal ends of the concave spherical surface of the housing 200. The base plate 208, external gear 209, crank 210, connecting rod 211, bearing 213, and inserts 214 are installed on the two planes of the inner hole of the inner ring 215 by internal hex screws 207. The bushing housing 200 is a cylindrical structure with a sealing groove at one end for installing an air seal 201. The inner side of the other end is a concave spherical surface with two notches in the horizontal direction for installing two corresponding detachable inserts 214. The vertical direction of the concave spherical surface has several teeth at the upper and lower ends. Four T-shaped ribs 203 are designed in the middle of the cylindrical shape and at the upper and lower ends of the corresponding slider. A screw plug 202 is installed at the top and bottom of the bushing housing 200. Therefore, the inner diameter of the bushing 206 is 0.15mm smaller than the outer diameter of the drive shaft 101. The two are interference-fitted and heat-fitted. The inner ring 215 has a convex spherical outer circle that mates with the bushing housing 200. It has a square through hole at the top and bottom, and a flat surface at both the top and bottom with several threaded holes evenly distributed on each surface. A threaded hole is also designed on one end flat surface of the inner ring. When the convex spherical surface of the inner ring 215 and the concave spherical surface of the bushing housing 200 are assembled, they form a swingable spherical bearing. Its width, radius of curvature, and other parameters must meet the 11-degree design requirement, meaning the outer ring remains horizontal while the inner ring swings at least 5.5 degrees on one side.

[0043] The installation steps for bushing 103 are as follows:

[0044] Step 1) Pre-assemble components such as base plate 208, external gear 209, crank 210, connecting rod 211, bearing 213, and insert 214. Figure 5The enlarged view of part III shows that it is installed on the two planes of the inner hole of the inner ring 215 using hex socket screws 207. The tension spring 212 is not installed for the time being.

[0045] Step 2) Install the O-ring 216 in place, and place the cylindrical bushing housing 200 vertically (with the axis perpendicular to the ground) with the concave spherical surface on top;

[0046] Step 3) Lift the inner ring 215 horizontally, that is, make the inner hole axis parallel to the ground and the end face perpendicular to the ground.

[0047] Step 4) Move the inner ring 215 directly above the bushing housing 200 and align it with the notch. Slowly lower it. When the convex spherical surface of the inner ring 215 can engage with the concave spherical surface of the bushing housing 200, rotate the inner ring 215 around the inner hole axis of the bushing housing 200 by 90 degrees. At this time, the inner ring 215 and the two spherical surfaces of the bushing housing 200 are in mutual cooperation.

[0048] Step 5) Install the insert 214 to completely fill the concave spherical notch of the bushing housing 200;

[0049] Step 6) Rotate the inner ring 215 another 90 degrees so that the axes of the two inner holes of the inner ring 215 and the bushing housing 200 coincide.

[0050] Step 7) Install tension spring 212. Under its action, the external teeth 209 mesh with the teeth on the concave spherical surface of the bushing housing 200.

[0051] Step 8) Rotate the assembled shell 90 degrees so that the axis is parallel to the ground; install the inflatable seal 201 in place.

[0052] The assembled connector sleeve 103 is then installed onto the spindle, which mainly involves the following steps:

[0053] Step 1: Install the bushing 206 onto the corresponding part of the drive shaft 101 by heating and expanding it. After cooling, the two will become one.

[0054] Step 2: Connect the inner ring 215 on the bushing 103 to the bushing 206 using bolts 207.

[0055] Step 3: Install the limit fork 204 and the limit screw 205.

[0056] Step 4: Since the inner ring 215 and the bushing housing 200 have a spherical fit, the bushing housing 200 is in a downward-pressed state under its own weight, meaning its axis forms a certain angle with the horizontal line. Adjust the bushing housing 200 to be level, install the tension spring 212, and under the tension of the spring 212, the external teeth 209 mesh with the teeth on the concave spherical surface of the bushing housing 200, keeping the axis of the bushing housing 200 horizontal.

[0057] Step 5: Slowly push the flat head sleeve 104 horizontally into the connecting sleeve 103. The flat head sleeve 104 first contacts the bearing 213, and continues to move forward, pushing the crank 210 and connecting rod 211 to overcome the tension of the tension spring 212 and disengage the external tooth 209 from the teeth on the concave spherical surface of the connecting sleeve housing 200. The inner ring 215 can swing within a certain range from the spherical surface of the connecting sleeve housing 200.

[0058] Step Six: After the flat cap 104 is installed in place, slowly inflate the air seal 201 until the sealing lip at the lower end contacts the flat cap 104.

[0059] Step 7: Remove the plug 202 at the upper end of the bushing 103, inject thin oil into one-quarter of the cavity, and reinstall the plug 202.

[0060] Step 8: Rotate the drive shaft 101 at low speed and observe the contact area between the lip of the air seal 201 and the flat head sleeve 104. If there is thin oil overflowing, continue to inflate the air seal 201 until there is no more oil overflowing.

[0061] Installation and operation process: Refer to Figure 1 — Figure 13 , Figure 1 As shown in the schematic diagram of the present invention, the axis of the transmission shaft 101 has a certain angle (<5.5 degrees) with the horizontal line. The housing 200 on the flat head sleeve 104 and the connecting shaft sleeve 103 is in a horizontal state. The locking mechanism on the connecting shaft sleeve 103 is in an open state. The inner ring 215 and the spherical surface of the connecting shaft sleeve housing 200 can swing.

[0062] Rotating the drive shaft 101 transmits torque to the flat-head sleeve 104 via the copper slider 105. The limiting fork 204 and the limiting screw 205 then drive the connecting sleeve housing 200 to rotate synchronously. (Reference) Figure 6 At this time, the two T-shaped stiffeners 203, c and d, rotate to position a or b with a certain amount of thin oil and pour it down, which happens to be poured onto the contact surface between the copper slider 105 and the drive shaft 101 and the flat head sleeve 104, thus playing a role in lubrication and cooling.

[0063] When changing the roller, the flat head sleeve 104 is slowly pulled out. After it is separated from the bearing 213, under the tension of the tension spring 212, the outer teeth 209 mesh with the teeth on the concave spherical surface of the bushing housing 200. The inner and outer teeth of the locking mechanism mesh with each other, and the bushing housing 200 maintains its original state, so as not to affect the next roller loading. That is, the flat head sleeve 104 can re-enter without adjusting the working angle of the bushing housing 200.

[0064] By taking the above measures, the defects described in the background description were avoided and the beneficial effects described in the invention were successfully achieved.

[0065] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A lubricating device for a cardan shaft with sliding block, characterized in that, The lubricating device comprises a transmission shaft, copper sliding blocks, a flat head sleeve and an axle sleeve, two copper sliding blocks are connected and installed on the transmission shaft through a sliding block pin, one end of the axle sleeve is integrally sleeved on the outer circle of the transmission shaft, the other end is sleeved on the outer circle of the flat head sleeve, one end of the flat head sleeve is sleeved on the roll neck, and the other end of the flat head sleeve is inserted between the two copper sliding blocks; The axle sleeve comprises a sleeve shell, an inflation seal, a screw plug, a T-shaped rib plate, a limiting fork, a limiting screw rod, a sleeve, an internal hexagonal screw, a bottom plate, an external tooth, a crank, a connecting rod, a tension spring, a bearing, an embedded block, an inner ring and an O-shaped ring; four limiting forks are installed on the sleeve, corresponding limiting screw rods are installed on the end face of the shell, the sleeve rotates synchronously relative to the transmission shaft and the sleeve, the inner ring is connected with the sleeve through the internal hexagonal screw, the O-shaped ring is installed on the concave spherical surface of the shell and plays a sealing role, two embedded blocks are respectively installed on the horizontal ends of the concave spherical surface of the shell, the bottom plate, the external tooth, the crank, the connecting rod, the bearing and the embedded block are installed on the two planes in the inner hole of the inner ring through the internal hexagonal screw; the sleeve shell is a cylindrical tubular structure, one end of which is designed with a sealing groove and is provided with an inflation seal; the inner side of the other end is a concave spherical surface, two notches are designed in the horizontal direction of the concave spherical surface and are provided with two detachable embedded blocks, a plurality of teeth are designed on the upper and lower ends of the vertical direction of the concave spherical surface, four T-shaped rib plates are designed on the upper and lower ends of the cylindrical tubular middle part corresponding to the sliding blocks, and one screw plug is installed on the upper and lower ends of the sleeve shell.

2. The lubricating device for a cardan shaft with sliding block according to claim 1, characterized in that, The inner diameter of the sleeve is 0.15mm smaller than the outer diameter of the transmission shaft, and the two are in interference fit, and the hot mounting process is adopted.

3. The lubricating device for a cardan shaft with sliding block according to claim 2, characterized in that, The outer circle of the inner ring is designed as a convex spherical surface matched with the sleeve shell, and there is a square through hole on the upper and lower ends, and a plane is designed on the upper and lower ends of the inner ring, and a plurality of threaded holes are uniformly distributed on the plane; a threaded hole is designed on one side end plane of the inner ring.

4. The lubricating device for a cardan shaft with sliding block according to claim 3, characterized in that, The installation steps of the axle sleeve are as follows: Step 1) The bottom plate, the external tooth, the crank, the connecting rod, the bearing and the embedded block are installed on the two planes in the inner hole of the inner ring through the internal hexagonal screw, and the tension spring is temporarily not installed; Step 2) The O-shaped ring is installed in place, the cylindrical sleeve shell is vertically placed, and the concave spherical surface is upward; Step 3) The inner ring is hoisted horizontally, that is, the inner hole axis is parallel to the ground, and the end face is perpendicular to the ground; Step 4) The inner ring is moved to the upper side of the sleeve shell and aligned with the notch, and is slowly put down, when the outer convex spherical surface of the inner ring and the concave spherical surface of the sleeve shell can be engaged, the inner ring is rotated around the inner hole axis of the sleeve shell by 90 degrees, at this time, the two spherical surfaces of the inner ring and the sleeve shell are matched with each other; Step 5) The embedded block is installed to fill the notch of the concave spherical surface of the sleeve shell; Step 6) The inner ring is rotated by 90 degrees again, so that the two inner hole axes of the inner ring and the sleeve shell coincide; Step 7) The tension spring is installed, and under the action of the tension spring, the external tooth and the teeth on the concave spherical surface of the sleeve shell are engaged with each other; Step 8) The assembled shell is turned over by 90 degrees, the axis is parallel to the ground, and the inflation seal is installed in place.

5. The lubricating device for a cardan shaft with sliding block according to claim 4, characterized in that, The assembled axle sleeve is installed on the main shaft, mainly including the following steps: Step one: the sleeve is installed on the corresponding part of the transmission shaft through heating expansion, and after cooling, the two become one, Step two: the inner ring on the sleeve is connected with the sleeve through a bolt, Step three: the limiting fork and the limiting screw rod are installed, Step four: because the inner ring and the shaft sleeve shell is a spherical surface matching relationship, the shaft sleeve shell in the state of self-weight is under pressure, that is, the axis and the horizontal line form a certain angle, adjust the shaft sleeve shell to be horizontal, install the tension spring, under the action of the tension spring, the outer teeth and the teeth on the concave spherical surface of the shaft sleeve shell are engaged, the axis of the shaft sleeve shell remains horizontal, Step five: slowly push the flat head sleeve into the shaft sleeve horizontally, the flat head sleeve first contacts the bearing, continue to advance, push the crank and connecting rod, overcome the tension of the tension spring, disengage the outer teeth and the teeth on the concave spherical surface of the shaft sleeve shell, the inner ring and the spherical surface of the shaft sleeve shell can swing within a certain range, Step six: after the flat head sleeve is installed in place, slowly inflate the air seal, when the lower seal lip contacts the flat head sleeve, it can be considered as completed, Step seven: remove the plug at the upper end of the shaft sleeve, inject one-fourth of the cavity with thin oil, and reinstall the plug, Step eight: rotate the transmission shaft at low speed, observe the contact part of the air seal lip and the flat head sleeve, if there is oil overflow, continue to inflate the air seal, until there is no oil overflow.

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