A press-fitting device

Abstract

The present application provides a press-fitting device, which includes a housing, a driving device, a pressing head and a workbench. The pressing head is in transmission connection with the driving device, the driving device is fixedly connected to the housing, the workbench is located below the pressing head, and the workbench is fixedly connected to the housing. The driving device is used to drive the pressing head to move towards the workbench. The pressing head is used to press-fit a bearing into a shaft hole on an end cover on the workbench. The device further includes a base, a thimble is provided on the upper surface of the base, a distance sensor is provided on the lower surface of the pressing head, a cavity is provided on the lower surface of the pressing head, the cavity is matched with the upper surface of the end cover, and the central axis of the thimble and the central axis of the shaft hole are on the same straight line.

Description

Technical Field

[0001] The present application relates to the field of press-fitting technology, and in particular to a press-fitting device. Background Art

[0002] A press-fit device is a device that presses two workpieces together in a straight line. It usually includes a housing, a hydraulic cylinder and a workbench. The two workpieces are pre-aligned and placed or fixed on the workbench. Then the hydraulic cylinder is started to press one of the workpieces onto the other workpiece, for example, pressing a bearing into a sleeve hole.

[0003] One end of the motor end cover in the prior art has a first accommodating groove and a second accommodating groove, and the other end of the end cover is provided with an axial hole, in which a rolling bearing needs to be pressed. In the prior art, the end cover opening is usually facing downward, with the bottom surface against the upper surface of the workbench, and then a clamp is used to pre-tighten the end cover to prevent the end cover from sliding relative to the workbench in the horizontal direction during the pressing process. Then, the rolling bearing is aligned and placed at the upper end of the axial hole, and the hydraulic cylinder is started. The piston of the hydraulic cylinder moves downward to gradually press the rolling bearing into the axial hole.

[0004] However, the axial distance of the bearing pressed into the shaft hole is difficult to control, and the press-fitting efficiency and precision are low. Summary of the invention

[0005] The present application provides a press-fitting device, which is used to solve the problem in the prior art that the axial distance of a bearing pressed into a shaft hole is difficult to control.

[0006] To achieve the above objectives, the embodiments of the present application propose the following technical solutions:

[0007] A press-fitting device comprises a shell, a driving device, a pressing head and a workbench, wherein the pressing head is transmission-connected to the driving device, the driving device is fixedly connected to the shell, the workbench is located below the pressing head, and the workbench is fixedly connected to the shell, the driving device is used to drive the pressing head to move in a direction close to the workbench, the pressing head is used to press-fit a bearing into an axial hole on an end cover on the workbench, and also comprises a base, the upper surface of the base is provided with an ejector pin, the lower surface of the pressing head is provided with a distance sensor, the lower surface of the pressing head is provided with a cavity, the cavity matches the upper surface of the end cover, and the central axis of the ejector pin and the central axis of the axial hole are located on the same straight line.

[0008] In some embodiments, a first sleeve detection shaft is fixedly connected to the lower surface of the indenter. A first sleeve detection sleeve is sleeved on the first sleeve detection shaft. A first limiting ring is fixedly connected to the lower end of the first sleeve detection shaft. A first necking is provided at the upper end of the first sleeve detection sleeve. The first necking is located above the first limiting ring. The lower surface of the first necking is in contact with the upper surface of the first limiting ring in the vertical direction. The inner wall of the first necking is slidably connected to the first sleeve detection shaft in the vertical direction. The distance sensor includes a first infrared sensor, and the first infrared sensor is disposed on the lower surface of the first limiting ring.

[0009] In some embodiments, a first spring is sleeved on the first sleeve detection shaft. The upper end of the first spring abuts against the lower surface of the indenter, and the lower end of the first spring abuts against the upper surface of the first sleeve detection sleeve.

[0010] In some embodiments, the lower surface of the first sleeve detection sleeve is lower than the lower surface of the first sleeve detection shaft. A measurement reference surface is provided on the end cover. The measurement reference surface is directly below the lower surface of the first limiting ring, and there is a gap between the first limiting ring and the measurement reference surface.

[0011] In some embodiments, a first positioning block and a second positioning block are fixedly connected to the upper surface of the base. A first accommodation groove and a second accommodation groove are provided on the lower surface of the end cover. The first positioning block matches the first accommodation groove, and the second positioning block matches the second accommodation groove.

[0012] In some embodiments, an installation groove is provided on the upper surface of the first positioning block, and the lower end of the ejector pin is inserted into the installation groove.

[0013] In some embodiments, a second limiting ring is fixedly connected to the middle upper part of the ejector pin. The diameter of the second limiting ring is larger than the diameter of the ejector pin. A second sleeve detection sleeve is sleeved on the ejector pin. A second necking is provided at the lower end of the second sleeve detection sleeve. The inner wall of the second necking is slidably connected to the ejector pin. The upper surface of the necking is in contact with the lower surface of the second limiting ring in the vertical direction. A second spring is sleeved on the ejector pin. The second spring is located between the base and the second sleeve detection sleeve. The upper end of the second spring abuts against the lower end surface of the second sleeve detection sleeve, and the lower end of the second spring abuts against the upper surface of the base. The upper surface of the second limiting ring is lower than the top surface of the ejector pin. The projection distance in the vertical direction between the top surface of the ejector pin and the second limiting ring is greater than the axial length of the bearing. There is a gap between the lower surface of the second sleeve detection sleeve and the upper surface of the base. A second infrared sensor is provided on the lower surface of the second sleeve detection sleeve.

[0014] In some embodiments, the base is slidably connected to the upper surface of the workbench in the horizontal direction.

[0015] In some embodiments, a chute is provided on the upper surface of the workbench. The chute is arranged in the horizontal direction. A slider is fixedly connected to the lower surface of the base. The slider is slidably connected to the chute in the horizontal direction.

[0016] In some embodiments, the driving device includes a telescopic rod. The telescopic rod is arranged vertically. The pressing head is detachably and fixedly connected to the lower end of the telescopic rod. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the pressing device in the embodiment of the present application;

[0019] Figure 2 It is a schematic structural diagram when the pressing head, end cover, base and workbench are matched in the embodiment of the present application;

[0020] Figure 3 It is a schematic structural diagram of the pressing head, end cover, base and workbench in another perspective when they are matched in the embodiment of the present application;

[0021] Figure 4 It is a schematic structural diagram when the end cover and the base are matched in the embodiment of the present application;

[0022] Figure 5 It is a schematic structural diagram of the base in the embodiment of the present application;

[0023] Figure 6 It is Figure 3 a cross-sectional view taken along the A-A direction in

[0024] Figure 7 It is Figure 3 a cross-sectional view taken along the B-B direction in

[0025] Reference Signs:

[0026] 101. Housing; 102. Driving device; 103. Ram; 104. Workbench; 105. Base; 106. Center punch; 107. Cavity; 108. First bushing detection shaft; 109. First bushing detection sleeve; 110. First limiting ring; 111. First infrared sensor; 112. First spring; 113. Measuring reference surface; 114. First positioning block; 115. Second positioning block; 116. First accommodating groove; 117. Second accommodating groove; 118. Mounting groove; 119. Second limiting ring; 120. Second bushing detection sleeve; 121. Second necking; 122. Second spring; 123. Slide groove; 124. Telescopic rod; 125. End cover; 126. Shaft hole; 127. Bearing. Detailed implementation manner

[0027] The following further describes in detail the implementation manners of the present application in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0028] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0030] In the embodiments of the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", "some examples" or "possible implementation manners" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do 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. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0032] Please refer to Figures 1 to 7 , in the embodiments of the present application, a pressing device is provided, which includes a housing 101, a driving device 102, a pressing head 103 and a workbench 104. The pressing head 103 is in transmission connection with the driving device 102, the driving device 102 is fixedly connected to the housing 101, the workbench 104 is located below the pressing head 103, and the workbench 104 is fixedly connected to the housing 101. The driving device 102 is used to drive the pressing head 103 to move in a direction close to the workbench 104, and the pressing head 103 is used to press-fit a bearing 127 into a shaft hole 126 on an end cover 125 on the workbench 104. It further includes a base 105, a thimble 106 is provided on the upper surface of the base 105, a distance sensor is provided on the lower surface of the pressing head 103, a cavity 107 is provided on the lower surface of the pressing head 103, the cavity 107 matches the upper surface of the end cover 125, and the central axis of the thimble 106 and the central axis of the shaft hole 126 are on the same straight line.

[0033] In some embodiments, a first bushing detection shaft 108 is fixedly connected to the lower surface of the indenter 103. A first bushing detection sleeve 109 is sleeved on the first bushing detection shaft 108. A first limiting ring 110 is fixedly connected to the lower end of the first bushing detection shaft 108. A first constriction is provided at the upper end of the first bushing detection sleeve 109. The first constriction is located above the first limiting ring 110. The lower surface of the first constriction is in vertical contact with the upper surface of the first limiting ring 110. The inner wall of the first constriction is slidably connected to the first bushing detection shaft 108 in the vertical direction. The distance sensor includes a first infrared sensor 111, and the first infrared sensor 111 is disposed on the lower surface of the first limiting ring 110.

[0034] In some embodiments, a first spring 112 is sleeved on the first bushing detection shaft 108. The upper end of the first spring 112 abuts against the lower surface of the indenter 103, and the lower end of the first spring 112 abuts against the upper surface of the first bushing detection sleeve 109.

[0035] In some embodiments, the lower surface of the first bushing detection sleeve 109 is lower than the lower surface of the first bushing detection shaft 108. A measurement reference surface 113 is provided on the end cap 125. The measurement reference surface 113 is located directly below the lower surface of the first limiting ring 110, and there is a gap between the first limiting ring 110 and the measurement reference surface 113.

[0036] In some embodiments, a first positioning block 114 and a second positioning block 115 are fixedly connected to the upper surface of the base 105. First receiving grooves 116 and second receiving grooves 117 are provided on the lower surface of the end cap 125. The first positioning block 114 is matched with the first receiving groove 116, and the second positioning block 115 is matched with the second receiving groove 117.

[0037] In some embodiments, an installation groove 118 is provided on the upper surface of the first positioning block 114, and the lower end of the ejector pin 106 is inserted into the installation groove 118.

[0038] In some embodiments, a second limiting ring 119 is fixedly connected to the upper middle part of the ejector pin 106. The diameter of the second limiting ring 119 is greater than that of the ejector pin 106. A second bushing detection sleeve 120 is sleeved on the ejector pin 106. A second constriction 121 is provided at the lower end of the second bushing detection sleeve 120. The inner wall of the second constriction 121 is slidably connected to the ejector pin 106. The upper surface of the constriction abuts against the lower surface of the second limiting ring 119 in the vertical direction. A second spring 122 is sleeved on the ejector pin 106. The second spring 122 is located between the base 105 and the second bushing detection sleeve 120. The upper end of the second spring 122 abuts against the lower end surface of the second bushing detection sleeve 120, and the lower end of the second spring 122 abuts against the upper surface of the base 105. The upper surface of the second limiting ring 119 is lower than the top surface of the ejector pin 106. The projection distance in the vertical direction between the top surface of the ejector pin 106 and the second limiting ring 119 is greater than the axial length of the bearing 127. There is a gap between the lower surface of the second bushing detection sleeve 120 and the upper surface of the base 105. A second infrared sensor is provided on the lower surface of the second bushing detection sleeve 120.

[0039] In some embodiments, the base 105 is slidably connected to the upper surface of the workbench 104 in the horizontal direction.

[0040] In some embodiments, a chute 123 is provided on the upper surface of the workbench 104. The chute 123 is arranged in the horizontal direction. A slider is fixedly connected to the lower surface of the base 105. The slider is slidably connected to the chute 123 in the horizontal direction. The slider is located on the lower surface of the base 105 and is not shown in the figure.

[0041] In some embodiments, the driving device 102 includes a telescopic rod 124. The telescopic rod 124 is arranged vertically. The pressing head 103 is detachably and fixedly connected to the lower end of the telescopic rod 124.

[0042] In the press-fitting device provided in this embodiment, the driving device 102 uses a servo motor to drive the telescopic rod 124 to move in the vertical direction, or uses a hydraulic cylinder or a pneumatic cylinder. During the working process, the bearing 127 is sleeved on the top end of the thimble 106, the end cover 125 is buckled on the base 105, the first positioning block 114 and the second positioning block 115 are respectively inserted into the first accommodating groove 116 and the second accommodating groove 117 of the end cover 125, the side wall of the first positioning block 114 abuts against the side wall of the first accommodating groove 116, and the side wall of the second positioning block 115 abuts against the side wall of the second accommodating groove 117, so as to prevent the end cover 125 from moving horizontally during the press-fitting process. At this time, the bearing 127 is located directly below the shaft hole 126. The driving device 102 drives the telescopic rod 124 to move downward, the pressing head 103 moves downward, the inner wall of the cavity 107 abuts against and squeezes the upper surface of the end cover 125, and there is a gap between the lower surface of the end cover 125 and the upper surface of the base 105. During the process of the pressing head 103 squeezing the end cover 125, the thimble 106 moves upward relative to the end cover 125, and the bearing 127 is pushed into the shaft hole 126. During the process of pressing the bearing 127 into the shaft hole 126, the distance between the lower surface of the first limiting ring 110 and the reference plane gradually decreases. At the same time, the end cover 125 pushes the second bushing detection sleeve 120 downward, and the distance between the lower surface of the second bushing detection sleeve 120 and the upper surface of the base 105 gradually decreases. The first infrared sensor 111 and the second infrared sensor respectively detect the distance between the first positioning ring and the measurement reference plane 113 and the distance between the second bushing detection sleeve 120 and the base 105, so as to judge the depth of the bearing 127 pressed into the shaft hole 126. When the detected pressing depth reaches the preset depth, the pressing head 103 stops squeezing, and the driving device 102 drives the pressing head 103 to move upward to complete the press-fitting, realizing more precise control of the depth of the bearing 127 pressed in.

[0043] The above embodiments are only explanations of the present application, and they do not limit the present application. After reading this specification, those skilled in the art can make modifications to the embodiments of the present application that do not contribute creatively according to needs, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A press-fitting device, comprising a housing (101), a driving device (102), a punch (103) and a workbench (104), wherein the punch (103) is in transmission connection with the driving device (102), the driving device (102) is fixedly connected to the housing (101), the workbench (104) is located below the punch (103), the workbench (104) is fixedly connected to the housing (101), the driving device (102) is configured to drive the punch (103) to move towards the workbench (104), and the punch (103) is configured to press-fit a bearing (127) into a shaft hole (126) of an end cap (125) on the workbench (104), characterized in that, It further includes a base (105), on the upper surface of the base (105) there is a thimble (106), on the lower surface of the press head (103) there is a distance sensor, on the lower surface of the press head (103) there is a cavity (107), the cavity (107) is matched with the upper surface of the end cover (125), the central axis of the thimble (106) and the central axis of the shaft hole (126) are on the same straight line, the lower surface of the press head (103) is fixedly connected with a first sleeve detection shaft (108), a first sleeve detection sleeve (109) is sleeved on the first sleeve detection shaft (108), the lower end of the first sleeve detection shaft (108) is fixedly connected with a first limiting ring (110), the upper end of the first sleeve detection sleeve (109) is provided with a first constriction, the first constriction is above the first limiting ring (110), the lower surface of the first constriction is in vertical contact with the upper surface of the first limiting ring (110), the inner wall of the first constriction is in vertical sliding connection with the first sleeve detection shaft (108), the distance sensor includes a first infrared sensor (111), the first infrared sensor (111) is arranged on the lower surface of the first limiting ring (110), a first spring (112) is sleeved on the first sleeve detection shaft (108), the upper end of the first spring (112) is in contact with the lower surface of the press head (103), the lower end of the first spring (112) is in contact with the upper surface of the first sleeve detection sleeve (109), the middle upper part of the thimble (106) is fixedly connected with a second limiting ring (119), the diameter of the second limiting ring (119) is larger than the diameter of the thimble (106), a second sleeve detection sleeve (120) is sleeved on the thimble (106), the lower end of the second sleeve detection sleeve (120) is provided with a second constriction (121), the inner wall of the second constriction (121) is in sliding connection with the thimble (106), the upper surface of the constriction is in vertical contact with the lower surface of the second limiting ring (119), a second spring (122) is sleeved on the thimble (106), the second spring (122) is between the base (105) and the second sleeve detection sleeve (120), the upper end of the second spring (122) is in contact with the lower end face of the second sleeve detection sleeve (120), the lower end of the second spring (122) is in contact with the upper surface of the base (105), the upper surface of the second limiting ring (119) is lower than the top surface of the thimble (106), the projection distance in the vertical direction between the top surface of the thimble (106) and the second limiting ring (119) is greater than the axial length of the bearing (127), there is a gap between the lower surface of the second sleeve detection sleeve (120) and the upper surface of the base (105), and a second infrared sensor is arranged on the lower surface of the second sleeve detection sleeve (120).

2. The press-fitting device according to claim 1, wherein The lower surface of the first bushing detection sleeve (109) is lower than the lower surface of the first bushing detection shaft (108). A measurement reference surface (113) is provided on the end cover (125), and the measurement reference surface (113) is directly below the lower surface of the first limiting ring (110). There is a gap between the first limiting ring (110) and the measurement reference surface (113).

3. The press-fitting device according to claim 2, characterized in that, A first positioning block (114) and a second positioning block (115) are fixedly connected to the upper surface of the base (105). A first accommodation groove (116) and a second accommodation groove (117) are provided on the lower surface of the end cover (125). The first positioning block (114) is matched with the first accommodation groove (116), and the second positioning block (115) is matched with the second accommodation groove (117).

4. The press-fitting device according to claim 3, characterized in that, An installation groove (118) is provided on the upper surface of the first positioning block (114), and the lower end of the ejector pin (106) is inserted into the installation groove (118).

5. The press-fitting device according to claim 4, characterized in that, The base (105) is slidably connected to the upper surface of the workbench (104) in the horizontal direction.

6. The press-fitting device according to claim 5, wherein A chute (123) is provided on the upper surface of the workbench (104). The chute (123) is arranged in the horizontal direction. A slider is fixedly connected to the lower surface of the base (105), and the slider is slidably connected to the chute (123) in the horizontal direction.

7. The press-fitting device according to claim 6, characterized in that, The driving device (102) includes a telescopic rod (124). The telescopic rod (124) is vertically arranged, and the pressing head (103) is detachably and fixedly connected to the lower end of the telescopic rod (124).

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