CN214134770U

CN214134770U - Floating pressure head and press-mounting machine

Info

Publication number: CN214134770U
Application number: CN202023095622.7U
Authority: CN
Inventors: 周宏建; 孙稳
Original assignee: Shanghai Jiaocheng Ultrasonic Technology Co ltd
Current assignee: Shanghai Jiaocheng Ultrasonic Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-09-07
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a pressure head and pressure equipment machine float relates to pressure equipment technical field. The floating pressure head comprises a positioning mandrel, a connecting shaft, a pressure plate, a first floating structure and a second floating structure. The pressed workpiece is sleeved at one end of the positioning mandrel, and the positioning mandrel is used for supporting and positioning the pressed workpiece. The connecting shaft is arranged between the positioning core shaft and the pressing plate, one end of the connecting shaft is detachably connected with the pressing plate, and the other end of the connecting shaft is abutted to the positioning core shaft. A first floating structure is arranged between the connecting shaft and the positioning mandrel, a second floating structure can be matched with the circumferential direction of the pressed workpiece, and the first floating structure and the second floating structure jointly adjust the press-fitting deviation of the pressed workpiece. This pressure head floats makes the pressure equipment power obviously reduce through first floating structure and second floating structure combined action, has improved the pressure equipment precision, has prevented effectively that the damage of pressed work piece and mounting hole or installation axle has reduced the noise and the vibration of drive disk assembly operation moreover, has improved production efficiency and product quality.

Description

Floating pressure head and press-mounting machine

Technical Field

The utility model relates to a pressure equipment technical field especially relates to a pressure head and pressure equipment machine float.

Background

On the automatic assembly line of transmission equipment, because factors such as work piece self error and equipment precision, certain deviation must exist between the center of the work piece of being pressed and work piece mounting hole or installation axle, if the press directly pushes down, press output pressure will double and increase to cause the work piece of being pressed and the wearing and colliding with of mounting hole inner wall or installation axle surface, the work piece during operation will also be in abnormal state, weakens the effect that work pieces such as bearing regard as precision transmission part.

The floating pressure head in the prior art can only adjust the one-way deviation of a pressed workpiece generally, and cannot meet the requirement of multidirectional floating.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure head and pressure equipment machine float, should float the pressure head and can realize that the multidirectional is floated, improved the pressure equipment precision.

To achieve the purpose, the utility model adopts the following technical proposal:

a floating ram, comprising:

the positioning mandrel is sleeved at one end of the positioning mandrel and used for supporting and positioning the pressed workpiece;

the connecting shaft is arranged between the positioning mandrel and the pressing plate, one end of the connecting shaft is detachably connected with the pressing plate, and the other end of the connecting shaft is abutted to the positioning mandrel;

the first floating structure is arranged between the connecting shaft and the positioning mandrel, the second floating structure can be matched with the circumferential direction of the pressed workpiece, and the press-fitting deviation of the pressed workpiece is adjusted by the first floating structure and the second floating structure together.

Optionally, be provided with first chamber and the second chamber of holding in the connecting axle, first hold the chamber with the second holds and is provided with the intercommunicating pore between the chamber, first floating structure set up in first hold the intracavity, the one end of location dabber with first floating structure cooperation, and the warp the intercommunicating pore gets into the second holds the chamber.

Optionally, the floating pressure head further comprises a buffer piece, the buffer piece is fixed to the end portion, located at one end of the second accommodating cavity, of the positioning mandrel, a first elastic piece is arranged between the buffer piece and the positioning mandrel, one end of the first elastic piece is abutted to the buffer piece, and the other end of the first elastic piece is abutted to the side wall of the second accommodating cavity.

Optionally, the floating pressure head further comprises a positioning cavity and a second elastic piece, the positioning mandrel, the connecting shaft and the pressing plate are movably arranged in the positioning cavity in a penetrating mode, the second elastic piece is sleeved on the connecting shaft, one end of the second elastic piece is abutted to the pressing plate, and the other end of the second elastic piece is abutted to the positioning cavity.

Optionally, a first step is arranged in the positioning cavity, the first step is located between the pressing plate and the connecting shaft, one side, close to the pressing plate, of the first step is abutted to the second elastic piece, and one side, far away from the pressing plate, of the first step can be abutted to the connecting shaft.

Optionally, the floating pressure head further comprises a first guide pin, the first guide pin is fixed on the circumference of the positioning mandrel, a first guide groove is formed in the circumferential wall of the positioning cavity and corresponds to the first guide pin, and the first guide groove extends along the press-fitting direction.

Optionally, the floating pressure head further comprises a second guide pin, the second guide pin is fixed on the positioning mandrel and the end face matched with the connecting shaft, a second guide groove is correspondingly formed in the end face matched with the positioning mandrel and the second guide pin, and the second guide groove extends in the direction perpendicular to the press-fitting direction.

Optionally, the floating pressure head further comprises a positioning end cover, the positioning end cover is fixedly connected with one end, far away from the pressure plate, of the positioning mandrel, the periphery of the positioning end cover is matched with the inner ring of the pressed workpiece, and the second floating structure is arranged on the periphery, matched with the inner ring of the pressed workpiece, of the positioning end cover; or the like, or, alternatively,

the second floating structure is arranged on the inner wall of the positioning cavity matched with the outer ring of the pressed workpiece.

Optionally, the second floating structure is a plurality of spring plungers, and the plurality of spring plungers are arranged at intervals on the periphery of the positioning end cover matched with the inner ring of the pressed workpiece; or the like, or, alternatively,

and the spring plungers are arranged on the inner wall of the positioning cavity matched with the outer ring of the pressed workpiece at intervals.

The press-mounting machine comprises a press-mounting platform, a driving mechanism and the floating pressure head, wherein the driving mechanism and the floating pressure head are arranged on the press-mounting platform, and the driving mechanism is connected with the floating pressure head and used for driving the floating pressure head to press-mount a pressed workpiece.

The utility model has the advantages that:

the utility model provides a pressure head floats is connected clamp plate and the positioning core axle that is used for supporting the quilt and presses the work piece through the connecting axle, applys external force to the clamp plate, accomplishes the assembly of quilt pressing the work piece. A first floating structure is arranged between the connecting shaft and the positioning mandrel, and can adjust the radial deviation between the pressed workpiece and the mounting hole or the mounting shaft of the pressed workpiece; the second floating structure can adjust the angle deviation between the pressed workpiece and the mounting hole or mounting shaft of the pressed workpiece, and the combined action of the first floating structure and the second floating structure obviously reduces the press-fitting force, improves the press-fitting precision, effectively prevents the pressed workpiece and the mounting hole or mounting shaft of the pressed workpiece from being damaged, and reduces the production cost; and the noise and vibration of the operation of the transmission part are reduced, and the production efficiency and the product quality are improved.

Drawings

Fig. 1 is a cross-sectional view of a floating ram provided in a second embodiment of the present invention;

fig. 2 is a schematic structural diagram of a floating pressure head provided in the second embodiment of the present invention;

fig. 3 is a cross-sectional view of the floating pressure head provided by the third embodiment of the present invention.

In the figure:

100. a pressed workpiece;

1. positioning the mandrel; 2. a connecting shaft; 3. pressing a plate; 4. a flat ball bearing; 5. a buffer member; 6. a first elastic member; 7. positioning the cavity; 8. a second elastic member; 9. positioning the end cover; 10. a spring plunger; 20. a first guide pin; 30. a second guide pin;

11. a first shaft; 12. a second shaft; 13. a first shoulder; 21. a second guide groove; 22. a second accommodating chamber; 23. a second shoulder; 71. a first guide groove; 72. a first step.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

In an automatic assembly line of transmission equipment, press mounting of a moving part and a positioning pin on a box body, positioning and assembly of main component parts such as an inner ring and an outer ring of a bearing, an oil seal, a gear on a shaft system, a snap spring and the like are completed by using press mounting equipment. The press mounting equipment mainly comprises a pressure head mechanism, a driving mechanism, a supporting mechanism, a control system and the like. The pressing head mechanism directly contacts with the pressed workpiece 100, and has the main functions of positioning and fixing the pressed workpiece 100 and transmitting the pressing force. The quality of the design and manufacture of the pressure head mechanism directly influences the service performance of each key part and finally influences the quality and the service life of products, for example, the rotary sealing ring is improperly assembled and abraded to cause oil leakage of a reduction gearbox, the scratch or collision of a bearing causes noise and vibration to be increased, and the service life is reduced.

The embodiment provides a press-fitting machine, including the pressure equipment platform, actuating mechanism and unsteady pressure head all set up on the pressure equipment platform, and actuating mechanism is connected with unsteady pressure head for the pressure equipment of drive unsteady pressure head is pressed work piece 100. The pressed workpiece 100 is a bearing, when the bearing is assembled with a bearing seat, the floating pressure head positions and supports the bearing, the driving mechanism drives the floating pressure head to move, and the bearing is pressed to match an outer ring of the bearing with an inner ring of the bearing seat; when the bearing is assembled with the shaft, the floating pressure head positions and supports the bearing, the driving mechanism drives the floating pressure head to move, and the bearing is pressed and assembled so as to match the inner ring of the bearing with the shaft. The driving mechanism can be a linear driving mechanism such as an air cylinder or a hydraulic cylinder.

Of course, in other embodiments, the pressed workpiece 100 is not limited to a bearing.

Example two

As shown in fig. 1 and 2, the present embodiment provides a floating ram including a positioning mandrel 1, a connecting shaft 2, a pressing plate 3, a first floating structure, and a second floating structure. The pressed workpiece 100 is sleeved at one end of the positioning mandrel 1, and the positioning mandrel 1 is used for supporting and positioning the pressed workpiece 100. Connecting axle 2 sets up between positioning core axle 1 and clamp plate 3, and the one end of connecting axle 2 can be dismantled with clamp plate 3 through fastening bolt and be connected, and the other end and positioning core axle 1 butt. A first floating structure is arranged between the connecting shaft 2 and the positioning mandrel 1; the second floating structure can be matched with the circumferential direction of the pressed workpiece 100, and the first floating structure and the second floating structure jointly adjust the press-fitting deviation of the pressed workpiece 100.

According to the floating pressure head provided by the embodiment, the pressure plate 3 is connected with the positioning mandrel 1 for supporting the workpiece 100 to be pressed through the connecting shaft 2, external force is applied to the pressure plate 3, and the assembly of the workpiece 100 to be pressed is completed. A first floating structure is arranged between the connecting shaft 2 and the positioning mandrel 1, and can adjust the radial deviation between the workpiece 100 to be pressed and the mounting hole or mounting shaft of the workpiece 100 to be pressed; the second floating structure can adjust the angle deviation between the pressed workpiece 100 and the mounting hole or mounting shaft of the pressed workpiece 100, the first floating structure and the second floating structure act together to obviously reduce the press-fitting force, improve the press-fitting precision, effectively prevent the pressed workpiece 100 and the mounting hole or mounting shaft of the pressed workpiece from being damaged, and reduce the production cost; and the noise and vibration of the operation of the transmission part are reduced, and the production efficiency and the product quality are improved.

In order to realize the adjustment of the radial floating amount of the floating pressure head to the pressed bearing, a first accommodating cavity and a second accommodating cavity 22 are arranged in the connecting shaft 2, a communicating hole is formed between the first accommodating cavity and the second accommodating cavity 22, a first floating structure is arranged in the first accommodating cavity, one end of the positioning core shaft 1 is matched with the first floating structure, and the positioning core shaft enters the second accommodating cavity 22 through the communicating hole. In this embodiment, the first floating structure is the planar ball bearing 4, the retainer ring groove of the planar ball bearing 4 is installed downwards, the positioning mandrel 1 floats along the radial direction through the rotation of the planar ball, and the radial deviation is adjusted, so that the pressed bearing is driven by the positioning mandrel 1 to adjust the radial deviation, the error between the pressed bearing and the installation hole or the installation shaft of the pressed bearing is effectively compensated, and the positioning deviation between the parts of the assembly line is automatically assembled, so that the radial error between the pressed bearing and the installation hole or the installation shaft is reduced.

In order to prolong the rolling life of the plane ball bearing 4, the ball and the retainer rings at two sides of the plane ball bearing 4 are ground after high-frequency quenching, so that the wear resistance is improved.

In order to prevent the planar ball bearing 4 from loosening, the floating pressure head further comprises a buffer piece 5, the buffer piece 5 is fixed at the end part of one end, located in the second accommodating cavity 22, of the positioning mandrel 1, a first elastic piece 6 is arranged between the buffer piece 5 and the positioning mandrel 1, one end of the first elastic piece 6 is abutted to the buffer piece 5, and the other end of the first elastic piece is abutted to the side wall of the second accommodating cavity 22. The positioning mandrel 1 is connected to the connecting shaft 2 through the first elastic piece 6 and the planar ball bearing 4, the diameter of the buffer piece 5 is larger than that of the positioning mandrel 1 in the second accommodating cavity 22, and the buffer piece 5 is fixed to the end portion of the positioning mandrel 1 through a fastening screw.

The positioning mandrel 1 comprises a first shaft 11, a second shaft 12 and a first shaft shoulder 13 positioned between the first shaft 11 and the second shaft 12, wherein the first shaft 11 is matched with a bearing to be pressed, and the diameter of the first shaft 11 is matched with the inner diameter of the bearing to be pressed. The second shaft 12 is fitted with the flat ball bearing 4 and enters the second accommodating chamber 22 through the communication hole. The first elastic member 6 is in a compressed state between the buffer member 5 and the connecting shaft 2, and always has a tendency to move toward the buffer member 5, thereby providing a pulling force toward the pressing plate 3 to the flat ball bearing 4, thereby fixing the flat ball bearing 4 between the first receiving cavity and the first shoulder 13 to prevent the flat ball bearing 4 from being loosened. The buffer piece 5 is made of rubber or plastic, and can buffer the impact and vibration of the press-fitting force of the press-fitting machine on the positioning mandrel 1.

In order to facilitate the resetting of the pressing plate 3 and provide certain buffering for the pressing plate 3, the floating pressing head further comprises a positioning cavity 7 and a second elastic piece 8, the positioning core shaft 1, the connecting shaft 2 and the pressing plate 3 are all movably arranged in the positioning cavity 7, the second elastic piece 8 is sleeved on the connecting shaft 2, one end of the second elastic piece 8 is abutted to the pressing plate 3, and the other end of the second elastic piece is abutted to the positioning cavity 7. In the present embodiment, a gap is provided between the positioning cavity 7 and the connecting shaft 2, and the second elastic member 8 is disposed in the gap. Specifically, a first step 72 is arranged in the positioning cavity 7, the first step 72 is located between the pressing plate 3 and the connecting shaft 2, one side, close to the pressing plate 3, of the first step 72 is abutted to the second elastic part 8, and one side, far away from the pressing plate 3, of the first step 72 can be abutted to the connecting shaft 2. One end of the connecting shaft 2, which is far away from the pressing plate 3, is provided with a second shoulder 23, one end of the second shoulder 23 of the connecting shaft 2 and one side of the second step, which is far away from the pressing plate 3, can be abutted, and the other end of the second shoulder 23 of the connecting shaft 2 is abutted against the first shoulder 13 of the positioning core shaft 1. When the bearing is pressed, the driving mechanism drives the pressing plate 3, the pressing force is transmitted to the positioning mandrel 1 through the connecting shaft 2, the pressing plate 3, the connecting shaft 2 and the positioning mandrel 1 move in the positioning cavity 7 under the action of the pressing force, and the positioning mandrel 1 acts on the pressed bearing to press the pressed bearing into the mounting hole or the mounting shaft. In the press fitting process, the second elastic part 8 is compressed by the acting force of the press plate 3, and after the press fitting is completed, the press plate 3 resets under the action of the elastic restoring force of the second elastic part 8, and meanwhile, a buffering force is provided for the press plate 3.

In the present embodiment, the first elastic member 6 and the second elastic member 8 are both springs.

In order to further improve the press-fitting precision, the floating pressure head further comprises a first guide pin 20, the first guide pin 20 is fixed on the circumference of the positioning core shaft 1, a first guide groove 71 is arranged on the circumferential wall of the positioning cavity 7 corresponding to the first guide pin 20, and the first guide groove 71 extends along the press-fitting direction. Be provided with first pinhole on the circumference of positioning core axle 1, first uide pin 20 includes round pin post and the cap body, round pin post and first pinhole tight fit, and the cap body sets up in first guide way 71, and first guide way 71 extends to the tip of the one end that clamp plate 3 was kept away from to location cavity 7 along the pressure equipment direction, not only can prevent that positioning core axle 1 is rotatory, provides the guide effect for positioning core axle 1 at the pressure equipment in-process simultaneously.

Further, the floating pressure head further comprises a second guide pin 30, the second guide pin 30 is fixed on the end face, matched with the connecting shaft 2, of the positioning core shaft 1, a second guide groove 21 is correspondingly arranged on the end face, matched with the positioning core shaft 1, of the connecting shaft 2 and the second guide pin 30, and the second guide groove 21 extends in the direction perpendicular to the press-fitting direction. The second guide pin 30 has the same structure as the first guide pin 20, and is provided on a mating surface of the first shoulder 13 and the second shoulder 23. The first shaft shoulder 13 is provided with a second pin hole, the pin of the second guide pin 30 is tightly matched with the second pin hole, and the cap body of the second guide pin 30 is arranged in the second guide groove 21 to prevent the connecting shaft 2 from rotating in the press-fitting process. The second guide groove 21 extends to the end of the second shoulder 23 to facilitate the machining of the second guide groove 21.

When the bearing is assembled with the bearing seat, the outer ring of the bearing is matched with the bearing seat, in order to realize the adjustment of the floating pressure head on the central angle deviation of the bearing and the bearing seat, the floating pressure head further comprises a positioning end cover 9, the positioning end cover 9 is fixedly connected with one end of the positioning core shaft 1, which is far away from the pressing plate 3, the periphery of the positioning end cover 9 is matched with the inner ring of the pressed bearing, and a second floating structure is arranged on the periphery of the positioning end cover 9 matched with the inner ring of the pressed bearing. In this embodiment, the positioning end cap 9 is detachably connected to the end of the first shaft 11 of the positioning core shaft 1 by screws or by a shaft-hole tight fit. The outer diameter of the positioning end cap 9 is the same as the diameter of the first shaft 11. And arranging a second floating structure on the outer peripheral wall of the positioning end cover 9 matched with the inner ring of the pressed bearing to be matched with the inner ring of the pressed bearing so as to realize the adjustment of the angle deviation of the pressed bearing.

The problems that in the prior art, offset is obtained through elastic deformation of an O-shaped ring, the floating amount of a floating pressure head is limited, the O-shaped ring is aged and abraded quickly, the floating amount of the pressure head becomes unstable, the press mounting is unqualified, and the use efficiency is low are solved. The second floating structure in this embodiment is provided as a plurality of spring plungers 10, and the spring plungers 10 are provided at intervals, and are all provided on the outer periphery of the positioning end cover 9 that is engaged with the inner ring of the pressed workpiece 100. The elastic compression amount of the spring plunger 10 arranged on the circumferential direction of the positioning end cover 9 is utilized to adjust the central angle deviation between the pressed workpiece 100 and the mounting hole, the spring plunger 10 is not easy to wear, and the floating amount is large.

EXAMPLE III

The difference between this embodiment and the second embodiment is:

as shown in fig. 3, when the bearing is assembled with the shaft, the inner ring of the bearing is matched with the shaft, in order to adjust the angular deviation between the bearing and the shaft center by the floating pressure head, the second floating structure is arranged on the inner wall of the positioning cavity 7 matched with the outer ring of the pressed bearing, and the plurality of spring plungers 10 are arranged on the inner wall of the positioning cavity 7 matched with the outer ring of the pressed bearing at intervals and matched with the outer ring of the pressed bearing, so as to adjust the angular deviation between the pressed bearing and the shaft center, thereby improving the assembling accuracy between the bearing and the shaft.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A floating ram, comprising:

the positioning device comprises a positioning mandrel (1), a pressed workpiece (100) is sleeved at one end of the positioning mandrel (1), and the positioning mandrel (1) is used for supporting and positioning the pressed workpiece (100);

the connecting shaft (2) is arranged between the positioning core shaft (1) and the pressing plate (3), one end of the connecting shaft (2) is detachably connected with the pressing plate (3), and the other end of the connecting shaft is abutted to the positioning core shaft (1);

the first floating structure is arranged between the connecting shaft (2) and the positioning mandrel (1), and the second floating structure can be matched with the circumferential direction of the pressed workpiece (100); the first floating structure and the second floating structure jointly adjust the press-fitting deviation of the pressed workpiece (100).

2. A floating head according to claim 1, characterized in that a first containing chamber and a second containing chamber (22) are provided in the connecting shaft (2), a communication hole is provided between the first containing chamber and the second containing chamber (22), the first floating structure is provided in the first containing chamber, one end of the positioning mandrel (1) is engaged with the first floating structure and enters the second containing chamber (22) through the communication hole.

3. The floating pressure head according to claim 2, characterized in that the floating pressure head further comprises a buffer member (5), the buffer member (5) is fixed to the end of the positioning mandrel (1) at one end located in the second accommodating cavity (22), a first elastic member (6) is arranged between the buffer member (5) and the positioning mandrel (1), one end of the first elastic member (6) is abutted to the buffer member (5), and the other end is abutted to the side wall of the second accommodating cavity (22).

4. The floating pressure head according to claim 1, further comprising a positioning cavity (7) and a second elastic member (8), wherein the positioning mandrel (1), the connecting shaft (2) and the pressure plate (3) are movably arranged in the positioning cavity (7) in a penetrating manner, the second elastic member (8) is sleeved on the connecting shaft (2), one end of the second elastic member (8) is abutted against the pressure plate (3), and the other end of the second elastic member is abutted against the positioning cavity (7).

5. A floating ram according to claim 4, characterised in that a first step (72) is provided in the positioning cavity (7), the first step (72) being located between the pressure plate (3) and the connecting shaft (2), the side of the first step (72) close to the pressure plate (3) being in abutment with the second resilient member (8), the side of the first step (72) remote from the pressure plate (3) being capable of being in abutment with the connecting shaft (2).

6. A floating pressure head according to claim 4, characterized in that the floating pressure head further comprises a first guide pin (20), the first guide pin (20) is fixed on the circumference of the positioning mandrel (1), a first guide groove (71) is arranged on the circumferential wall of the positioning cavity (7) corresponding to the first guide pin (20), and the first guide groove (71) extends along the press-fitting direction.

7. The floating pressure head according to claim 6, characterized in that the floating pressure head further comprises a second guide pin (30), the second guide pin (30) is fixed on the end surface of the positioning mandrel (1) matched with the connecting shaft (2), a second guide groove (21) is arranged on the end surface of the connecting shaft (2) matched with the positioning mandrel (1) corresponding to the second guide pin (30), and the second guide groove (21) extends along the direction perpendicular to the press-fitting direction.

8. The floating pressure head according to any one of claims 1-7, characterized in that the floating pressure head further comprises a positioning end cover (9), the positioning end cover (9) is fixedly connected with one end of the positioning mandrel (1) far away from the pressure plate (3), the outer periphery of the positioning end cover (9) is matched with the inner ring of the workpiece to be pressed (100), and the second floating structure is arranged on the outer periphery of the positioning end cover (9) matched with the inner ring of the workpiece to be pressed (100); or the like, or, alternatively,

the second floating structure is arranged on the inner wall of the positioning cavity (7) matched with the outer ring of the pressed workpiece (100).

9. The floating pressure head according to claim 8, characterized in that the second floating structure is a plurality of spring plungers (10), and the plurality of spring plungers (10) are arranged at intervals on the periphery of the positioning end cover (9) matched with the inner ring of the workpiece (100) to be pressed; or the like, or, alternatively,

the spring plungers (10) are arranged on the inner wall, matched with the outer ring of the pressed workpiece (100), of the positioning cavity (7) at intervals.

10. A press-fitting machine, characterized by comprising a press-fitting platform, a driving mechanism and a floating press head according to any one of claims 1 to 9, wherein the driving mechanism and the floating press head are arranged on the press-fitting platform, and the driving mechanism is connected with the floating press head and used for driving the floating press head to press-fit a pressed workpiece (100).