Self-centering floating pressure head mechanism

Abstract

The invention discloses a self-centering floating pressure head mechanism, and relates to the technical field of motor assembly. The pressure head comprises a counter-force supporting seat and a pressure head base, a supporting and positioning assembly is mounted at the top end of the counter-force supporting seat, and a workpiece shell is coaxially mounted at the top end of the supporting and positioning assembly; a pressing head mandrel is detachably installed at the bottom end of the pressing head base, a bearing pressing head is detachably installed at the bottom end of the pressing head mandrel, and the outer surface of the pressing head mandrel is sleeved with the top end of the bearing pressing head. Through mutual cooperation of the bearing pressing head, the pressing head mandrel, the floating assembly, the supporting and positioning assembly and other structures, floating fine adjustment of the bearing pressing head in the horizontal direction can be achieved, and self-adaptive fine adjustment of the bearing pressing head is facilitated under the condition that the coaxiality of the pressing head mandrel, the pressing head base and a workpiece shell is low; and the coaxiality of the bearing pressure head and the workpiece shell is improved, so that pressure displacement curves of batch products are smooth and uniform, and the inflection point force is lower than a design threshold value.

Description

Technical Field

[0001] The invention relates to the technical field of motor assembly, in particular to a self-centering floating pressure head mechanism. Background Art

[0002] In the field of three-in-one motor assembly line technology, the requirements for the pressure-displacement curve and the pressing inflection point force of the parts press-fitting assembly process are becoming increasingly higher, which puts extremely high demands on the coaxiality of the press-fitting equipment. The press-fitting coaxiality is easily affected by the accuracy of the equipment itself. In the prior art, when the accuracy of the press-fitting equipment itself is poor, it is impossible to perform adaptive fine-tuning to improve the positioning accuracy. For this reason, we propose a self-centering floating pressure head mechanism. Summary of the invention

[0003] The purpose of the present invention is to provide a self-centering floating press head mechanism, which can achieve extremely high coaxiality between the press-fitting part and the pressed part, so as to achieve that the press-fitting curve and the press-fitting inflection point force remain qualified within a relatively strict monitoring window.

[0004] To achieve the above object, the present invention provides the following technical solutions: a self-centering floating pressure head mechanism, comprising a reaction force support seat and a pressure head base, a support positioning assembly is installed at the top of the reaction force support seat, and a workpiece housing is coaxially installed at the top of the support positioning assembly;

[0005] A pressure head core shaft is detachably mounted on the bottom end of the pressure head base, a bearing pressure head is detachably mounted on the bottom end of the pressure head core shaft, a top end of the bearing pressure head is sleeved on the outer surface of the pressure head core shaft, and a floating assembly is arranged between the pressure head core shaft and the bearing pressure head, so as to enable the bearing pressure head to move horizontally on the pressure head core shaft;

[0006] The outer surface of the bearing pressure head is coaxially mounted with a bearing outer ring, and a positioning rod is fixedly connected to the center position of the bottom end of the bearing pressure head, and the positioning rod and the supporting positioning assembly are adapted to each other. When the bearing pressure head moves downward, the positioning rod and the supporting positioning assembly remain coaxial.

[0007] Furthermore, the supporting and positioning assembly includes a shell support member sleeved on a reaction force support seat, the outer surface of the shell support member is sleeved with a retaining sleeve, the outer surface of the retaining sleeve is fixedly connected to a base plate, and the bottom end of the workpiece shell is placed on the shell support member.

[0008] Furthermore, a fixing rivet is installed at the top of the pressure head base, and a stop pin is also installed at one side of the pressure head base.

[0009] Furthermore, the pressure head base and the pressure head core shaft are detachably mounted by bolts.

[0010] Furthermore, a limiting rod is inserted into the side wall of the bearing pressure head, and a through hole matching the limiting rod is opened inside the pressure head core shaft, and the two are detachably connected through the limiting rod.

[0011] Furthermore, a first top screw hole is provided inside the pressure head core shaft perpendicular to the direction of the limiting rod, a first top screw is threadedly connected to the first top screw hole, the first top screw is tightly pressed against the middle position of the limiting rod, and a through hole is provided on the side wall of the pressure head base corresponding to the first top screw hole for the first top screw to pass through;

[0012] A second top screw hole is provided inside the pressure head core shaft in a direction perpendicular to the first top screw hole, and a second top screw is connected to the inner thread of the second top screw hole, and the second top screw is tightly against the side surface of the first top screw.

[0013] Furthermore, an O-ring is provided on the outer surface of the pressure head core shaft, and a slot is provided on the top of the bearing pressure head, and the diameter of the slot is larger than the bottom end diameter of the pressure head core shaft.

[0014] Furthermore, a positioning groove matched with the positioning rod is formed at the top end of the shell support.

[0015] Furthermore, the floating assembly includes an upper pad installed at the bottom end of the pressure head core shaft and a lower pad installed at the bottom of the slot, a retaining frame is installed between the upper pad and the lower pad, and a plurality of balls are rollingly connected in the retaining frame.

[0016] Furthermore, the diameter of the lower pad is equal to the inner diameter of the slot, the diameter of the upper pad is smaller than the diameter of the lower pad, and the top and bottom of the ball are in contact with the upper pad and the lower pad respectively.

[0017] The present invention has at least the following beneficial effects:

[0018] 1. The present invention can achieve floating fine-tuning of the bearing pressure head in the horizontal direction through the mutual cooperation of the bearing pressure head, pressure head core shaft, floating assembly, support and positioning assembly and other structures, which is convenient for improving the coaxiality of the bearing pressure head and the workpiece shell by using the bearing pressure head adaptive fine-tuning when the coaxiality of the pressure head core shaft, the pressure head base and the workpiece shell is low, thereby achieving smooth and uniform pressure-displacement curves of batch products and the inflection point force is also lower than the design threshold.

[0019] 2. The present invention can effectively install and fix the pressure head core shaft and the bearing pressure head through the cooperation of the limit rod, the first top screw, the first top screw hole and other structures, and when the ball needs to be lubricated and maintained or the parts need to be replaced after long-term use, they can also be quickly disassembled, which is convenient and practical.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of the pressure head base structure of the present invention;

[0023] Figure 3 It is a cross-sectional schematic diagram of the pressure head mandrel structure of the present invention;

[0024] Figure 4 It is a side cross-sectional schematic diagram of the bearing pressure head structure of the present invention;

[0025] Figure 5 It is a front cross-sectional schematic diagram of the bearing pressure head structure of the present invention.

[0026] Reference numerals:

[0027] 1. Pressure head base; 2. Fixed rivet; 3. Anti-rotation pin; 4. Pressure head mandrel; 5. O-ring; 6. Limit rod; 7. Bearing pressure head; 8. Upper pad; 9. Cage; 10. Ball; 11. Lower pad; 12. Plunger; 13. Workpiece housing; 14. Bearing outer ring; 15. Base plate; 16. Reaction support seat; 17. Housing support; 18. Retaining sleeve; 19. Elastic retaining ring; 20. First top screw; 21. First top screw hole; 22. Slot; 23. Positioning rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0029] See also Figure 1-Figure 5 The present invention provides a technical solution: a self-centering floating pressure head mechanism, comprising a reaction force support seat 16 and a pressure head base 1, a support positioning component is installed at the top of the reaction force support seat 16, and a workpiece housing 13 is coaxially installed at the top of the support positioning component;

[0030] The bottom end of the pressure head base 1 is detachably mounted with a pressure head core shaft 4, and the bottom end of the pressure head core shaft 4 is detachably mounted with a bearing pressure head 7, the top end of the bearing pressure head 7 is sleeved on the outer surface of the pressure head core shaft 4, and a floating component is arranged between the pressure head core shaft 4 and the bearing pressure head 7, which is used to make the bearing pressure head 7 move horizontally on the pressure head core shaft 4;

[0031] The outer surface of the bearing pressure head 7 is coaxially mounted with the bearing outer ring 14, and a positioning rod 23 is fixedly connected to the center position of the bottom end of the bearing pressure head 7, and the positioning rod 23 and the supporting positioning assembly are adapted to each other. When the bearing pressure head 7 moves downward, the positioning rod 23 and the supporting positioning assembly remain coaxial.

[0032] For the technical solution of this embodiment, Figure 1 As shown, the supporting and positioning assembly includes a shell support 17 which is sleeved on a reaction support seat 16, and a retaining sleeve 18 is sleeved on the outer surface of the shell support 17. The outer surface of the retaining sleeve 18 is fixedly connected to a base plate 15, and the bottom end of the workpiece housing 13 is placed on the shell support 17, and the retaining sleeve 18 is fixedly connected to the shell support 17, and an elastic retaining ring 19 is provided between the bottom end of the retaining sleeve 18 and the shell support 17. It should be noted that the shell support 17 and the retaining sleeve 18 are slidably connected to facilitate the disassembly of the shell support 17. However, when supporting the workpiece housing 13, the shell support 17 uses the reaction support seat 16 to provide support, and the shell support 17 will not slide relative to the retaining sleeve 18, thereby facilitating the enhancement of the stability of the workpiece housing.

[0033] The top of the housing support 17 is provided with a positioning groove adapted to the positioning rod 23. When the positioning rod 23 is inserted into the positioning groove, the coaxiality between the bearing pressure head 7 and the housing support 17 can be ensured, and the workpiece housing 13 is coaxially arranged with the housing support 17, so the coaxiality between the bearing pressure head 7, the bearing outer ring 14 and the workpiece housing 13 can be ensured, thereby facilitating the improvement of the positioning accuracy during press-fitting;

[0034] A supporting groove is formed at the bottom end of the shell support member 17 to form a support groove with the reaction force support seat 16 .

[0035] It should be noted that a gripper will be formed on the periphery of the workpiece shell to fix the workpiece shell, and the entire gripper is installed on the robot for fixation, so the workpiece shell will not fall off.

[0036] For the technical solution of this embodiment, Figure 2 As shown, a fixing rivet 2 is installed at the top of the pressure head base 1, and a stop pin 3 is also installed on one side of the pressure head base 1. The fixing rivet 2 is used to facilitate the installation of the pressure head base 1 and the external lifting equipment (not shown in the figure), and the lifting equipment is used to drive the device to move up and down to realize the pressing operation of the bearing outer ring 14.

[0037] Furthermore, the pressure head base 1 and the pressure head core shaft 4 are detachably mounted by bolts, so that the parts can be easily replaced when they are damaged.

[0038] For the technical solution of this embodiment, Figure 4 and Figure 5As shown, a slot 22 is provided on the top of the bearing press head 7, and the press head core shaft 4 is inserted into the slot 22. The diameter of the slot 22 is larger than the bottom end diameter of the press head core shaft 4. A limit rod 6 is inserted on the side wall of the bearing press head 7, and a through hole compatible with the limit rod 6 is provided inside the press head core shaft 4. The two are detachably connected through the limit rod 6. When the limit rod 6 is inserted, the press head core shaft 4 and the bearing press head 7 can be installed and positioned.

[0039] Furthermore, if Figure 4 and Figure 5 As shown, a first top screw hole 21 is provided inside the pressure head core shaft 4 perpendicular to the direction of the limiting rod 6, and a first top screw 20 is connected to the inner thread of the first top screw hole 21. The first top screw 20 is tightly against the middle position of the limiting rod 6. After the limiting rod 6 positions the pressure head core shaft 4 and the bearing pressure head 7, the first top screw 20 is passed through the through hole and installed in the first top screw hole 21, and then the first top screw 20 is rotated to make it tightly against the limiting rod 6, so that the limiting rod 6 can be limited and locked to prevent it from sliding, which causes the pressure head core shaft 4 to separate from the bearing pressure head 7.

[0040] A second top screw hole is provided inside the pressing head core shaft 4 in a direction perpendicular to the first top screw hole 21, and the second top screw hole is connected to a second top screw through an internal thread. The second top screw hole is parallel to the limiting rod 6. The second top screw is inserted into the second top screw hole and rotated to make it tightly against the side of the first top screw 20, thereby facilitating the limiting locking of the first top screw 20. In this way, the stability of the pressing head core shaft 4 and the bearing pressing head 7 during installation is further improved.

[0041] Furthermore, a ring groove adapted to the first top screw 20 is opened in the middle of the limiting rod 6 to further enhance the locking effect, and a through hole is opened on the side wall of the pressure head base 1 corresponding to the first top screw hole 21 and the second top screw hole for the first top screw 20 and the second top screw to pass through.

[0042] Furthermore, the outer surface of the ram core shaft 4 is provided with two O-rings 5 ​​, which will cling to the outer wall after the diameter of the O-ring expands, ensuring that the ram core shaft 4 is at the geometric center of the ram base 1 without being affected by external forces.

[0043] According to the technical solution of this embodiment, the floating assembly includes an upper pad 8 installed at the bottom end of the pressure head core shaft 4 and a lower pad 11 installed at the bottom of the card slot 22. A retainer 9 is installed between the upper pad 8 and the lower pad 11. A plurality of balls 10 are rollingly connected in the retainer 9.

[0044] The diameter of the lower pad 11 is equal to the inner diameter of the slot 22, the diameter of the upper pad 8 is smaller than the diameter of the lower pad 11, and the top and bottom of the ball 10 are in contact with the upper pad 8 and the lower pad 11 respectively. Since the diameter of the slot 22 is larger than the diameter of the pressure head core shaft 4, the bearing pressure head 7 can move horizontally along the direction of the limit rod 6. At this time, the first top screw 20 and the second top screw are both located inside the pressure head core shaft 4, so they will not interfere with the horizontal movement of the bearing pressure head 7. When the bearing pressure head 7 moves, it will drive the ball 10 and the upper pad 8 and the lower pad 11 to move relative to each other, thereby facilitating the floating fine-tuning of the bearing pressure head 7, and facilitating the bearing pressure head 7 to adaptively float horizontally when the coaxiality of the pressure head core shaft 4, the pressure head base 1 and the workpiece housing 13 is low, and is stuck in the positioning groove at the top of the shell support 17, thereby improving the coaxiality of the bearing pressure head 7 and the workpiece housing 13, thereby achieving a smooth and uniform pressure displacement curve of batch products, and the inflection point force is also lower than the design threshold.

[0045] It should be noted that a plunger 12 is installed at the bottom end of the bearing pressure head 7 . When the bearing outer ring 14 is installed on the bearing pressure head 7 , the plunger 12 can be used to fix the bearing outer ring 14 .

[0046] The use principle and process of the present invention are as follows: when it is necessary to press-fit the bearing outer ring 14 into the workpiece housing 13, firstly, the workpiece housing 13 is installed on the housing support 17, and then the pressure head core shaft 4 is installed on the pressure head base 1 by bolts, and then the bearing pressure head 7 is installed on the pressure head core shaft 4 by the limit rod 6, and the bearing outer ring 14 is installed on the bearing pressure head 7 by the plunger 12, and then the device is connected to the external lifting device as a whole by means of the fixed rivet 2, and the press-fitting operation can be realized by aligning the device with the workpiece housing 13 so that the external lifting device drives the device to move downward, and when the bearing pressure head 7 moves downward, the positioning rod 23 will be stuck in the positioning groove, which can ensure the coaxiality between the bearing pressure head 7 and the housing support 17, and the workpiece housing 13 is coaxially arranged with the housing support 17, so that the coaxiality of the bearing pressure head 7, the bearing outer ring 14 and the workpiece housing 13 can be ensured, thereby facilitating the improvement of the positioning accuracy during press-fitting, and facilitating the smooth and uniform press-fitting pressure displacement curve while ensuring the coaxiality, and greatly reducing the inflection point force;

[0047] When the bearing pressure head 7 moves downward and drives the positioning rod 23 to be stuck in the positioning groove, at this time, if the coaxiality of the pressure head core shaft 4, the pressure head base 1 and the workpiece housing 13 is low, the bearing pressure head 7 will move horizontally along the direction of the limit rod 6. At this time, the ball 10 will move relative to the upper pad 8 and the lower pad 11, so as to facilitate the floating fine adjustment of the bearing pressure head 7. In this way, the outer ring 14 of the bearing can be accurately pressed into the workpiece housing 13 when the coaxiality of the pressure head core shaft 4, the pressure head base 1 and the workpiece housing 13 is low;

[0048] When the ball 10 needs to be lubricated and maintained or parts need to be replaced after long-term use, first rotate the second top screw to disengage it from the first top screw 20, and rotate the first top screw 20 to disengage it from the limit rod 6, so that the limit rod 6 can be unlocked, and the limit rod 6 can be removed from the pressure head core shaft 4 and the bearing pressure head 7, so as to facilitate the replacement or maintenance of the parts inside the slot 22.

[0049] 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.

[0050] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on", "installed on", "fixed on" or "set on" another element, it can be directly on the other element or there can also be a centered element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method.

[0051] 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.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A self-centering floating ram mechanism, comprising a reaction force support seat (16) and a ram base (1), characterized in that: A support and positioning assembly is installed at the top end of the reaction force support seat (16), and a workpiece housing (13) is coaxially installed at the top end of the support and positioning assembly; A pressure head core shaft (4) is detachably mounted on the bottom end of the pressure head base (1), a bearing pressure head (7) is detachably mounted on the bottom end of the pressure head core shaft (4), the top end of the bearing pressure head (7) is sleeved on the outer surface of the pressure head core shaft (4), and a floating assembly is provided between the pressure head core shaft (4) and the bearing pressure head (7) for enabling the bearing pressure head (7) to move horizontally on the pressure head core shaft (4); The outer surface of the bearing pressure head (7) is coaxially mounted with a bearing outer ring (14), and a positioning rod (23) is fixedly connected to the center position of the bottom end of the bearing pressure head (7), and the positioning rod (23) and the supporting positioning assembly are adapted to each other, and when the bearing pressure head (7) moves downward, the positioning rod (23) and the supporting positioning assembly remain coaxial.

2. A self-centering floating pressure head mechanism according to claim 1, characterized in that: The support and positioning assembly comprises a shell support (17) sleeved on a reaction force support seat (16); a retaining sleeve (18) is sleeved on the outer surface of the shell support (17); a base plate (15) is fixedly connected to the outer surface of the retaining sleeve (18); and the bottom end of the workpiece housing (13) is placed on the shell support (17).

3. A self-centering floating pressure head mechanism according to claim 2, characterized in that: A fixing rivet (2) is installed at the top of the pressure head base (1), and a stop pin (3) is also installed at one side of the pressure head base (1).

4. A self-centering floating head mechanism according to claim 2, characterized in that: The pressure head base (1) and the pressure head core shaft (4) are detachably mounted via bolts.

5. A self-centering floating head mechanism according to claim 4, characterized in that: A limiting rod (6) is inserted into the side wall of the bearing pressure head (7), and a through hole matching the limiting rod (6) is opened inside the pressure head core shaft (4), and the two are detachably connected via the limiting rod (6).

6. A self-centering floating head mechanism according to claim 5, characterized in that: A first top screw hole (21) is provided inside the pressure head core shaft (4) perpendicular to the direction of the limiting rod (6), a first top screw (20) is connected to the first top screw hole (21) through a thread, the first top screw (20) is tightly pressed against the middle position of the limiting rod (6), and a through hole is provided on the side wall of the pressure head base (1) corresponding to the first top screw hole (21) for the first top screw (20) to pass through; A second top screw hole is provided inside the pressure head core shaft (4) in a direction perpendicular to the first top screw hole (21), and a second top screw is connected to the internal thread of the second top screw hole, and the second top screw is tightly against the side of the first top screw (20).

7. A self-centering floating head mechanism according to claim 5, characterized in that: The outer surface of the pressure head core shaft (4) is provided with an O-ring (5), and the top of the bearing pressure head (7) is provided with a slot (22), and the diameter of the slot (22) is larger than the bottom end diameter of the pressure head core shaft (4).

8. A self-centering floating ram mechanism according to claim 7, characterized in that: A positioning groove matched with the positioning rod (23) is formed at the top end of the housing support (17).

9. A self-centering floating head mechanism according to claim 8, characterized in that: The floating assembly comprises an upper pad (8) mounted on the bottom end of the pressure head core shaft (4) and a lower pad (11) mounted on the bottom of the slot (22); a retaining frame (9) is mounted between the upper pad (8) and the lower pad (11); and a plurality of balls (10) are rollingly connected in the retaining frame (9).

10. A self-centering floating head mechanism according to claim 9, characterized in that: The diameter of the lower pad (11) is equal to the inner diameter of the slot (22), the diameter of the upper pad (8) is smaller than the diameter of the lower pad (11), and the top and bottom of the ball (10) are in contact with the upper pad (8) and the lower pad (11) respectively.

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