Fixed knot press-in device

Abstract

The invention relates to the technical field of fixed knot assembly, and discloses a fixed knot press-in device which comprises a jacking device, a fixing device and a supporting device, the jacking device comprises a first hydraulic machine and a jacking head, the jacking head comprises a mounting base, and the top of the mounting base is detachably connected to a push rod of the first hydraulic machine; the bottom of the mounting seat is fixedly connected with the inner support pillar, and the bottom of the inner support pillar is in a cone or frustum shape with a narrow lower part and a wide upper part; the outer jacking column is slidably connected to the outer side of the inner jacking column, and the top of the outer jacking column is connected to the bottom of the mounting base through a vertical spring; symmetrical sliding holes are formed in the two sides, close to the bottom, of the side jacking blocks and the outer jacking column, the side jacking blocks are slidably connected into the sliding holes, sliding slopes are arranged at the ends, located in the outer jacking column, of the side jacking blocks, and the sliding slopes are attached to the conical slopes at the bottom of the inner jacking column. And the universal joint is automatically pressed into the shaft rod, whether the position of the universal joint is accurate or not is automatically detected, and the universal joint is prevented from popping up.

Description

Technical Field

[0001] The invention relates to the technical field of fixed joint assembly, in particular to a fixed joint press-in device. Background Art

[0002] In the field of automotive parts automation equipment manufacturing, the assembly of the transmission shaft is an extremely critical link, especially the press-fit assembly between the fixed section, the movable section and the real shaft. Traditional fixed section press-fit equipment has many defects, which seriously restricts the improvement of production efficiency and product quality, and also brings great safety risks to operators.

[0003] In previous fixed joint press-in equipment, the spline alignment between the real shaft and the fixed joint was completely dependent on manual operation. Operators need to rely on experience and visual judgment to try to align the universal joint (fixed joint) with the splines on the shaft. However, due to the lack of precise auxiliary tools and automated means, in actual operation, the universal joint is often not vertically aligned with the splines on the shaft. This is because manual operation cannot guarantee that the universal joint can be accurately adjusted to the appropriate position and angle every time, and a slight deviation may cause serious problems in the subsequent press-in process.

[0004] A universal joint pressing device with patent publication number CN201618948U uses a tension pressure sensor to detect the pressure during pressing in real time, effectively improving the quality of the product. However, its detection is based on the premise that the universal joint is accurately pressed into the shaft.

[0005] When the splines on the universal joint and the shaft are not accurately aligned, if the universal joint is forced into place, a large lateral force will be generated due to the unbalanced interaction between the splines. This lateral force may instantly exceed the connection constraints between the universal joint and the surrounding components or the strength of its own structure, causing the universal joint to fly off. This will not only damage the equipment, but also endanger the personal safety of the operator in serious cases, greatly increasing the uncertainty and danger in the production process.

[0006] In addition, the existing equipment lacks an effective detection device for whether the press-in is accurate. After the press-in process is completed, it is impossible to know in time whether the universal joint is accurately pressed into place with the spline on the shaft. If there is a deviation in the press-in position, whether it exceeds the standard position or does not reach the standard depth, the overall performance of the product will be greatly reduced. For example, it may cause the drive shaft to experience increased vibration, reduced transmission efficiency, premature wear or even failure during operation, seriously affecting the quality stability and reliability of the product. Summary of the invention

[0007] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a fixed joint pressing device, which has the advantages of automatically pressing the universal joint into the shaft, automatically detecting whether the position of the universal joint is accurate, and preventing the universal joint from popping out, thereby solving the problem in the prior art of the lack of an effective detection device for whether the universal joint is pressed into the position accurately.

[0008] (II) Technical solution To achieve the above object, the present invention provides the following technical solutions: A fixed joint pressing device comprises a pressing device, a fixing device and a supporting device, wherein the pressing device comprises a No. 1 hydraulic press and a pressing head, and the pressing head comprises: A mounting seat, the top of which is detachably connected to a push rod of a No. 1 hydraulic press; An inner top column, the bottom of the mounting seat is fixedly connected to the inner top column, and the bottom of the inner top column is a cone or a frustum shape that is narrow at the bottom and wide at the top; An outer top column, wherein the outer top column is slidably connected to the outer side of the inner top column, and the top of the outer top column is connected to the bottom of the mounting seat through a vertical spring; Side top block, the outer top column is provided with symmetrical sliding holes on both sides near the bottom, the side top block is slidably connected in the sliding holes, and the end of the side top block located in the outer top column is provided with a sliding inclined surface, and the sliding inclined surface is in contact with the conical inclined surface at the bottom of the inner top column; When the No. 1 hydraulic press pushes the jacking head downward, the bottom of the outer push column first presses on the universal joint. At this time, the mounting seat and the inner push column continue to press downward, and the conical slope at the bottom of the inner push column pushes the side push blocks to both sides. When the position of the universal joint is accurate, the side push blocks are pushed outward and inserted into the yoke holes, thereby fixing the universal joint from both sides while pressing down the universal joint to prevent the universal joint from popping out or shifting. When the position of the universal joint shifts, the side push blocks are not aligned with the yoke holes, and are stuck by the yoke part of the universal joint when they are pushed outward.

[0009] Preferably, a vertical pressure sensor is provided at the bottom of the mounting seat at the part connected to the vertical spring, and the vertical pressure sensor is used to detect the upward pressure of the vertical spring. The distance between the bottom of the mounting seat and the top of the outer top column can be analyzed based on the upward pressure of the vertical spring. When the inner top column slides downward to a specified distance relative to the outer top column, that is, after the side top block protrudes outward for a certain distance, the vertical pressure sensor detects that the upward pressure of the vertical spring exceeds a preset value, so that the vertical pressure sensor can judge whether the side top block protrudes outward smoothly based on the pressure value, that is, whether the universal joint is accurately aligned with the shaft rod. The vertical pressure sensor is connected to control hydraulic press No. 1. When the pressure value detected by the vertical pressure sensor reaches the preset value, hydraulic press No. 1 is controlled to increase the pressure to press the universal joint into the shaft rod.

[0010] Preferably, at least one latch key is provided on the slide hole, a latch slot is provided on the side top block at a position corresponding to the latch key, a horizontal spring is provided in the latch slot, one end of the horizontal spring is connected to the latch key, and the other end is connected to a horizontal pressure sensor provided in the side top block, and the horizontal pressure sensor is used to detect the pressure of the horizontal spring in the horizontal direction, so as to determine the position of the side top block; The support device includes a base and a support tube, the support tube is used to be sleeved on the outside of the bottom of the shaft, the support tube is detachably fixedly connected to the top of the base, and a pressure sensor is arranged in the base to detect the downward pressure on the shaft; When the pressure detected in the base increases and the pressure detected in the horizontal pressure sensor remains unchanged, it means that the side top block is not aligned with the yoke hole. At the same time, the base can detect the pressure during pressing in real time.

[0011] Preferably, a shell is provided on the outer side of the connection position between the mounting seat and the outer top column, the top of the shell is detachably connected to the bottom of the mounting seat, the top of the outer top column slides in the cavity between the shell and the inner top column, and an exhaust hole is provided on the shell, which connects the cavity with the outside.

[0012] Preferably, the support tube includes an outer tube and an inner column, there is a gap between the outer tube and the inner column, the top of the shaft rod is inserted into the gap between the inner column and the outer tube, and the outer side of the inner column is provided with an outer spline that fits with the inner spline of the shaft rod.

[0013] Preferably, the fixing device includes a No. 2 hydraulic press fixed on the frame of the pressing device, a slidingly connected push rod is arranged in the No. 2 hydraulic press, the end of the push rod is fixedly connected to a cross plate, and slide grooves are arranged on both sides of the cross plate, and the fixing device also includes only two symmetrical chucks, one end of the chuck close to the No. 2 hydraulic press is rotatably connected in the fixing device, and the end of the chuck away from the No. 2 hydraulic press is used to clamp the shaft rod, and a convex column is arranged in the middle position of the chuck, and the convex column slides in the slide groove. When the No. 2 hydraulic press pushes the push rod to move in the direction of the shaft rod, the cross plate pushes the convex column to slide through the slide groove, so that the end of the chuck away from the No. 2 hydraulic press rotates inward to clamp the shaft rod.

[0014] Preferably, when the push rod moves to the farthest end, that is, the farthest from the No. 2 hydraulic press, the end of the chuck away from the No. 2 hydraulic press is located at an outwardly inclined angle to avoid the chuck being stuck due to being perpendicular to the cross plate.

[0015] Preferably, a soft rubber pad is provided on the inner side of one end of the chuck away from the No. 2 hydraulic press.

[0016] Preferably, the bottom of the outer top column and the top surface between the shaft rod yoke fit each other, and a soft rubber pad is provided at the bottom of the outer top column.

[0017] Preferably, a chamfer is provided on the edge of the end surface of the side top block located outside the outer top column.

[0018] (III) Beneficial effects Compared with the prior art, the present invention provides a fixed joint pressing device, which has the following beneficial effects: 1. The fixed joint pressing device is provided with an inner push column and an outer push column which are connected inside and outside and slide relatively. When the outer push column is pressed on the universal joint, the inner push column continues to press downward to push out the side push blocks arranged on both sides of the outer push column. When the universal joint is located at the convex key on the alignment shaft, the side push blocks can be accurately inserted into the yoke holes when they bulge outward. The sliding bulge structure can not only insert the side push blocks into the yoke holes when the universal joint is aligned, but also fix the universal joint, thereby preventing the universal joint from shaking, deviating or popping out after being damaged during the subsequent pressing process, but also can remind the staff of the deviation by judging the position of the side push blocks when the universal joint is not aligned.

[0019] 2. The fixed joint pressing device is provided with a vertical pressure sensor at the part connected to the vertical spring at the bottom of the mounting seat. The vertical pressure sensor detects the pressure of the vertical spring in the vertical direction, and then the No. 1 hydraulic press is set to two gears, including a positioning gear with lower pressure and a pressing gear with higher pressure. The pressure of the vertical spring is detected by the vertical pressure sensor to determine the distance between the mounting seat and the outer ejector column. When the pressure detected by the vertical pressure sensor exceeds the preset value, that is, the side ejector block is successfully ejected outward, the positioning gear is switched to the pressing gear to avoid damage to the equipment when the pressure is too high during positioning and causes displacement. The structure determines whether the universal joint is in the correct position and whether the inner ejector column slides to the predetermined position by judging the position direction of the side ejector block, and then starts to press the universal joint after completing all positioning work.

[0020] 3. The fixed-node pressing device is provided with a horizontal pressure sensor in the side top block and a base with the pressure sensor in the supporting device. When the pressure detected in the base increases and the pressure detected in the horizontal pressure sensor remains unchanged, it indicates that the side top block is not aligned with the node fork hole. Compared with visually observing whether the side top block protrudes into the node fork hole, the sensor detection is more accurate and rapid. At the same time, the base can detect the pressure during pressing in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is an overall cross-sectional view of the present invention.

[0023] Figure 3 It is a partial cross-sectional view of the present invention.

[0024] Figure 4It is a schematic diagram of the structure of the top pressure head of the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of the mounting seat of the present invention.

[0026] Figure 6 It is a schematic diagram of the structure of the outer top column and the side top block of the present invention.

[0027] Figure 7 It is a schematic diagram of the outer top column structure of the present invention.

[0028] Figure 8 It is a schematic diagram of the side top block structure of the present invention.

[0029] Fig. 9 It is a schematic diagram of the structure of the present invention.

[0030] Fig.10 It is a schematic diagram of the structure of the universal joint of the present invention.

[0031] Fig.11 It is a schematic diagram of the shaft rod structure of the present invention.

[0032] Fig.12 It is a schematic diagram of the support tube structure of the present invention.

[0033] Fig.13 It is a schematic diagram of the structure of the fixing device of the present invention.

[0034] Fig.14 It is a cross-sectional view of the fixing device of the present invention.

[0035] In the figure: 1, pressing device; 2, fixing device; 3, supporting device; 41, shaft; 42, universal joint; 421, yoke hole; 11. No. 1 hydraulic press; 12. Top pressure head; 121. Mounting seat; 122. Housing; 123. Inner top column; 124. Outer top column; 125. Vertical spring; 126. Side top block; 1211. Vertical pressure sensor; 1241. Sliding hole; 1242. Key; 1261. Slot; 1262. Horizontal spring; 1263. Horizontal pressure sensor; 1264. Sliding inclined plane; 31. base; 32. support tube; 321. outer tube; 322. inner column; 21. Hydraulic press No. 2; 22. Push rod; 23. Cross plate; 24. Chuck; 241. Boss; 231. Slideway. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, a fixed connection refers to a connection in which there is no relative movement after the parts or components are fixed; a transmission connection refers to a connection method in which mechanical motion or torque is transmitted to other working parts through a transmission part; a sliding connection refers to a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotating connection refers to a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Embodiment 1: This embodiment provides a fixed node pressing device having the following technical features.

[0041] See also Figure 1-14 A fixed joint pressing device includes a pressing device 1, a fixing device 2 and a supporting device 3. The pressing device 1 includes a No. 1 hydraulic press 11 and a pressing head 12. The pressing head 12 includes: A mounting seat 121, the top of which is connected to the push rod of the first hydraulic press 11 through threads; The inner top column 123, the bottom of the mounting seat 121 is fixedly connected to the inner top column 123 by threads, and the bottom of the inner top column 123 is a cone or a frustum shape that is narrow at the bottom and wide at the top; An outer top column 124, the outer top column 124 is slidably connected to the outer side of the inner top column 123, and the top of the outer top column 124 is connected to the bottom of the mounting seat 121 through a vertical spring 125; A side top block 126 is slidably connected in each sliding hole 1241 . A sliding inclined surface 1264 is provided at the end of each side top block 126 located in the outer top column 124 . The sliding inclined surface 1264 fits with the conical inclined surface at the bottom of the inner top column 123 .

[0042] In an optional embodiment, a vertical pressure sensor 1211 is provided at the bottom of the mounting seat 121 at the part connected to the vertical spring 125. The vertical pressure sensor 1211 is used to detect the upward pressure of the vertical spring 125. The distance between the bottom of the mounting seat 121 and the top of the outer top column 124 can be analyzed based on the upward pressure of the vertical spring 125. When the inner top column 123 slides downward to a specified distance relative to the outer top column 124, that is, after the side top block 126 protrudes outward for a certain distance, the vertical pressure sensor 1211 detects that the upward pressure of the vertical spring 125 exceeds a preset value, so that the vertical pressure sensor 1211 can judge whether the side top block 126 protrudes outward smoothly according to the pressure value, that is, judge whether the universal joint 42 is accurately aligned with the shaft rod 41. The vertical pressure sensor 1211 is connected to control the No. 1 hydraulic press 11. When the pressure value detected by the vertical pressure sensor 1211 reaches the preset value, the No. 1 hydraulic press 11 is controlled to increase the pressure to press the universal joint 42 into the shaft rod 41.

[0043] In an optional embodiment, at least one latch key 1242 is provided on the slide hole 1241, and a latch groove 1261 is provided at a position corresponding to the latch key 1242 on the side top block 126. A horizontal spring 1262 is provided in the latch groove 1261. One end of the horizontal spring 1262 is in contact with the latch key 1242, and the other end is fixedly connected to a horizontal pressure sensor 1263 provided in the side top block 126. The horizontal pressure sensor 1263 is used to detect the pressure of the horizontal spring 1262 in the horizontal direction, so as to determine the position of the side top block 126. The support device 3 includes a base 31 and a support tube 32. The support tube 32 is used to be sleeved on the outside of the bottom of the shaft 41. The support tube 32 is fixedly connected to the top of the base 31 by bolts. A pressure sensor is arranged in the base 31 to detect the downward pressure on the shaft 41. When the pressure detected in the base 31 increases and the pressure detected in the horizontal pressure sensor 1263 remains unchanged, it means that the side top block 126 is not aligned with the yoke hole 421. At the same time, the base 31 can detect the pressure during pressing in real time.

[0044] In an optional embodiment, a sleeve 122 is provided on the outer side of the connection position between the mounting seat 121 and the outer top column 124. The top of the sleeve 122 is detachably connected to the bottom of the mounting seat 121. The top of the outer top column 124 slides in the cavity between the sleeve 122 and the inner top column 123. An exhaust hole is provided on the sleeve 122, and the exhaust hole connects the cavity with the outside.

[0045] In an optional embodiment, the support tube 32 includes an outer tube 321 and an inner column 322, there is a gap between the outer tube 321 and the inner column 322, the top of the shaft rod 41 is inserted into the gap between the inner column 322 and the outer tube 321, and the outer side of the inner column 322 is provided with an external spline that fits with the internal spline of the shaft rod 41.

[0046] In an optional embodiment, the fixing device 2 includes a No. 2 hydraulic press 21 fixed on the frame of the pressing device, a slidingly connected push rod 22 is arranged in the No. 2 hydraulic press 21, and a cross plate 23 is fixedly connected to the end of the push rod 22, and slide grooves 231 are arranged on both sides of the cross plate 23. The fixing device 2 also includes only two symmetrical chucks 24, and the end of the chuck 24 close to the No. 2 hydraulic press 21 is rotatably connected in the fixing device 2, and the end of the chuck 24 away from the No. 2 hydraulic press 21 is used to clamp the shaft rod 41. A boss 241 is arranged in the middle position of the chuck 24, and the boss 241 slides in the slide groove 231. When the No. 2 hydraulic press 21 pushes the push rod 22 to move toward the direction of the shaft rod 41, the cross plate 23 pushes the boss 241 to slide through the slide groove 231, so that the end of the chuck 24 away from the No. 2 hydraulic press 21 rotates inward to clamp the shaft rod 41.

[0047] In an optional embodiment, when the push rod 22 moves to the farthest end, that is, the farthest from the second hydraulic press 21, the end of the chuck 24 away from the second hydraulic press 21 is located at an outwardly inclined angle to prevent the chuck 24 from being perpendicular to the cross plate 23 and causing it to get stuck.

[0048] In an optional embodiment, a soft rubber pad is provided on the inner side of one end of the chuck 24 away from the second hydraulic press 21 .

[0049] In an optional embodiment, the bottom of the outer top column 124 and the top surface between the forks of the shaft rod 41 fit each other, and a soft rubber pad is provided at the bottom of the outer top column 124 .

[0050] In an optional embodiment, a chamfer is provided on the end surface edge of the side top block 126 located outside the outer top column 124 .

[0051] In an optional embodiment, a sliding limit structure is provided between the inner top column 123 and the outer top column 124, and the sliding limit structure is used to limit the sliding range of the inner top column 123 in the outer top column 124. The sliding limit structure can be a boss provided on the top side of the inner top column 123. When the inner top column 123 slides downward a certain distance relative to the outer top column 124, that is, after the side top block 126 is pushed out into the yoke hole 421, the boss on the inner top column 123 presses against the top of the outer top column 124, thereby limiting the distance that the side top block 126 is pushed out. At the same time, after the side top block 126 is pushed out, the downward pressure of the mounting seat 121 and the inner top column 123 can be completely output to the outer top column 124.

[0052] In an optional embodiment, two gears are set when the No. 1 hydraulic press 11 is working, including a positioning gear and a pressing gear. The hydraulic pressure output in the positioning gear can push the side top block 126 to both sides, and the hydraulic pressure output in the pressing gear can press the universal joint 42 into the shaft 41. When the position of the universal joint 42 is offset, the side top block 126 is stuck by the yoke part of the universal joint 42 when it is pushed outward. The positioning gear is used for positioning. At this time, after the side top block 126 is blocked, the pressure generated by the positioning gear used is not enough to damage or bounce the universal joint 42.

[0053] Working principle: When the No. 1 hydraulic press 11 pushes the jacking head 12 downward, the bottom of the outer push column 124 first presses on the universal joint 42. At this time, the mounting seat 121 and the inner push column 123 continue to press downward, and the conical slope at the bottom of the inner push column 123 pushes the side push block 126 to both sides. When the position of the universal joint 42 is accurate, the side push block 126 is pushed outward and inserted into the yoke hole 421, thereby fixing the universal joint 42 from both sides while pressing down the universal joint 42 to prevent the universal joint 42 from popping out or shifting. When the position of the universal joint 42 shifts, the side push block 126 is not aligned with the yoke hole 421, and the side push block 126 is stuck by the yoke part of the universal joint 42 when it is pushed outward.

[0054] It should be noted that there is a situation where the universal joint 42 is excessively offset, resulting in the side top block 126 being able to be successfully ejected but not being able to be ejected into the yoke hole 421. However, since this situation is an extreme case and can be very intuitively discovered with the naked eye, most abnormal situations can be discovered by judging the position of the side top block 126.

[0055] To summarize, the fixed joint pressing device, by setting the fixing device 2 as an inner top column 123 and an outer top column 124 which are coupled inside and outside and slide relative to each other, when the outer top column 124 is pressed against the universal joint 42, the inner top column 123 continues to press downward to push out the side top blocks 126 set on both sides of the outer top column 124, and when the position of the universal joint 42 is aligned with the convex key on the shaft rod 41, the side top blocks 126 can be accurately inserted into the yoke hole 421 when they protrude outward. The sliding protrusion structure can not only insert the side top block 126 into the yoke hole 421 when the universal joint 42 is aligned, but also play the role of fixing the universal joint 42, preventing the universal joint 42 from shaking, deviating or popping out after being damaged during the subsequent pressing process, but also can judge the position of the side top block 126 when the universal joint 42 is not aligned to remind the staff of deviation.

[0056] The fixed joint pressing device is provided with a vertical pressure sensor 1211 at the part connected to the vertical spring 125 at the bottom of the mounting seat 121. The vertical pressure sensor 1211 detects the pressure of the vertical spring 125 in the vertical direction, and then the No. 1 hydraulic press 11 is set to two gears, including a positioning gear with a smaller pressure and a pressing gear with a larger pressure. The vertical pressure sensor 1211 detects the pressure of the vertical spring 125 to determine the distance between the mounting seat 121 and the outer push column 124. When the vertical pressure sensor 1211 detects that the pressure exceeds the preset value, that is, when the side push block 126 is successfully pushed outward, the positioning gear is switched to the pressing gear, thereby avoiding damage to the equipment when the pressure is too high during positioning and causing displacement. The structure determines whether the universal joint 42 is in the correct position and whether the inner push column 123 slides to the predetermined position by judging the position direction of the side push block 126, so as to start pressing the universal joint 42 after completing all positioning work.

[0057] The fixed-node pressing device is configured by arranging a horizontal pressure sensor 1263 in the side top block 126 and a base 31 with a pressure sensor in the support device 3. When the pressure detected in the base 31 increases and the pressure detected in the horizontal pressure sensor 1263 remains unchanged, it means that the side top block 126 is not aligned with the yoke hole 421. Compared with visually observing whether the side top block 126 protrudes into the yoke hole 421, the sensor detection is more accurate and faster. At the same time, the base 31 can detect the pressure during pressing in real time.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixed joint pressing device, comprising a pressing device (1), a fixing device (2) and a supporting device (3), characterized in that: The jacking device (1) comprises a No. 1 hydraulic press (11) and a jacking head (12), wherein the jacking head (12) comprises: A mounting seat (121), wherein the top of the mounting seat (121) is detachably connected to a push rod of a No. 1 hydraulic press (11); An inner top column (123), the bottom of the mounting seat (121) is fixedly connected to the inner top column (123), and the bottom of the inner top column (123) is in the shape of a cone or a frustum that is narrow at the bottom and wide at the top; An outer top column (124), the outer top column (124) is slidably connected to the outside of the inner top column (123), and the top of the outer top column (124) is connected to the bottom of the mounting seat (121) via a vertical spring (125); A side top block (126), wherein symmetrical sliding holes (1241) are arranged on both sides of the outer top column (124) close to the bottom, the side top block (126) is slidably connected in the sliding hole (1241), and a sliding inclined surface (1264) is arranged at the end of the side top block (126) located in the outer top column (124), and the sliding inclined surface (1264) is in contact with the conical inclined surface at the bottom of the inner top column (123).

2. A fixed node press-in device according to claim 1, characterized in that: A vertical pressure sensor (1211) is provided at the bottom of the mounting seat (121) at the portion connected to the vertical spring (125). The vertical pressure sensor (1211) is used to detect the upward pressure of the vertical spring (125). The distance between the bottom of the mounting seat (121) and the top of the outer top column (124) can be analyzed based on the upward pressure of the vertical spring (125).

3. A fixed node press-in device according to claim 2, characterized in that: At least one latching key (1242) is arranged on the sliding hole (1241); a latching slot (1261) is arranged on the side top block (126) at a position corresponding to the latching key (1242); a horizontal spring (1262) is arranged in the latching slot (1261); one end of the horizontal spring (1262) is connected to the latching key (1242) and the other end is connected to a horizontal pressure sensor (1263) arranged in the side top block (126); the horizontal pressure sensor (1263) is used to detect the pressure of the horizontal spring (1262) in the horizontal direction, so as to determine the position of the side top block (126); The support device (3) comprises a base (31) and a support tube (32), wherein the support tube (32) is used to be sleeved on the outside of the bottom of the shaft (41), and the support tube (32) is detachably fixedly connected to the top of the base (31), and a pressure sensor is arranged in the base (31) for detecting the downward pressure exerted on the shaft (41); When the pressure detected in the base (31) increases while the pressure detected in the horizontal pressure sensor (1263) remains unchanged, it indicates that the side top block (126) is not aligned with the yoke hole (421), and the base (31) can detect the pressure during pressing in real time.

4. A fixed node press-in device according to claim 3, characterized in that: A sleeve (122) is provided outside the connection position between the mounting seat (121) and the outer top column (124); the top of the sleeve (122) is detachably connected to the bottom of the mounting seat (121); the top of the outer top column (124) slides in the cavity between the sleeve (122) and the inner top column (123); and an exhaust hole is provided on the sleeve (122), which connects the cavity with the outside.

5. A fixed node press-in device according to claim 3, characterized in that: The support cylinder (32) comprises an outer cylinder (321) and an inner column (322), a gap is present between the outer cylinder (321) and the inner column (322), the top of the shaft rod (41) is inserted into the gap between the inner column (322) and the outer cylinder (321), and an outer side of the inner column (322) is provided with an outer spline that fits with the inner spline of the shaft rod (41).

6. A fixed node press-in device according to claim 3, characterized in that: The fixing device (2) comprises a No. 2 hydraulic press (21) fixed on a frame of the pressing device, a push rod (22) slidably connected is arranged in the No. 2 hydraulic press (21), a cross plate (23) is fixedly connected to the end of the push rod (22), and slide grooves (231) are arranged on both sides of the cross plate (23); The fixing device (2) further comprises only two symmetrical chucks (24), one end of the chuck (24) close to the No. 2 hydraulic press (21) is rotatably connected to the fixing device (2), and the end of the chuck (24) away from the No. 2 hydraulic press (21) is used to clamp the shaft (41). A convex column (241) is arranged at the middle position of the chuck (24), and the convex column (241) slides in the slide groove (231). When the push rod (22) is pushed by the No. 2 hydraulic press (21) to move in the direction of the shaft (41), the cross plate (23) pushes the convex column (241) to slide through the slide groove (231), so that the end of the chuck (24) away from the No. 2 hydraulic press (21) rotates inward to clamp the shaft (41).

7. A fixed node press-in device according to claim 6, characterized in that: When the push rod (22) moves to the farthest end, that is, the farthest from the second hydraulic press (21), the end of the chuck (24) away from the second hydraulic press (21) is located at an outwardly inclined angle to prevent the chuck (24) from being stuck due to being perpendicular to the cross plate (23).

8. A fixed node press-in device according to claim 6, characterized in that: A soft rubber pad is provided on the inner side of one end of the chuck (24) away from the second hydraulic press (21).

9. A fixed node press-in device according to claim 3, characterized in that: The bottom of the outer top column (124) and the top surface between the yokes of the shaft rod (41) fit each other, and a soft rubber pad is provided at the bottom of the outer top column (124).

10. A fixed node press-in device according to claim 3, characterized in that: The edge of the end surface of the side top block (126) located outside the outer top column (124) is chamfered.

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