Double-station bearing assembly mechanism for overtaking pulleys

Abstract

The present invention relates to the technical field of overrunning pulleys, and in particular to a double-station bearing assembly mechanism for overrunning pulleys, comprising a frame, a press-fitting die, and an upper press-fitting structure and a lower press-fitting structure arranged on the frame, wherein the upper press-fitting structure is located above the press-fitting die, and the lower press-fitting structure is located below the press-fitting die, the press-fitting die comprises a base and a positioning core, the upper press-fitting structure comprises a first upper driving device and an upper pressing head, and the lower press-fitting structure comprises a lower driving device and a lower pressing head. The double-station bearing assembly mechanism for overrunning pulleys of the present invention uses the same reference for positioning during the assembly process of two end bearings, thereby avoiding repeated switching of the assembly reference, ensuring the stability of the distance between the end face of the pulley and the end bearing on its side after assembly, and reducing the number of positioning and clamping times when the pulley is installed with the end bearing, thereby improving assembly efficiency, reducing one press-fitting device and the required operators, and reducing production costs.

Description

Technical Field

[0001] The invention relates to the technical field of an overrunning pulley, in particular to a double-station bearing assembly mechanism for an overrunning pulley. Background Art

[0002] At present, when assembling the ball bearing of a one-way overrunning pulley, two press-fitting is generally adopted. The principle of this assembly is: put the side of the pulley close to the motor end on the lower mold (positioned by the inner hole of the pulley), and then put the ball bearing on the upper mold. When the press machine moves downward, the ball bearing of the upper mold is pressed into the pulley; then turn the pulley over and put it on another lower mold (positioned by the hole on the other end face of the pulley), and then put the ball bearing into the upper mold. When the press machine moves downward, the ball bearing of the upper mold is pressed into the pulley. This assembly method has the following disadvantages: 1) Since the reference needs to be replaced twice for assembly, the distance between the end face of the core shaft after press-fitting and the end face of the pulley (11) has a large dispersion; 2) The positioning holes of the two press-fittings are inconsistent, which increases the risk of coaxiality and causes the quality consistency of the assembled product to deteriorate; 3) Two devices and multiple handling links increase the difficulty of assembly, and the manufacturing cost is high and the efficiency is low. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the deficiencies in the prior art, a double-station bearing assembly mechanism for an overrunning pulley is provided.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a double-station bearing assembly mechanism for an overrunning pulley, the overrunning pulley comprises a pulley, a one-way bearing, a core shaft and two end bearings, the pulley is coaxially arranged outside the core shaft, the one-way bearing is located between the pulley and the core shaft, the two end bearings are respectively located at two ends of the one-way bearing, and both are located between the pulley and the core shaft, the core shaft has a center hole, the assembly mechanism comprises a frame, a press-fitting die, and an upper press-fitting structure and a lower press-fitting structure arranged on the frame, the upper press-fitting structure is located above the press-fitting die, and the lower press-fitting structure is located below the press-fitting die;

[0005] The press-fitting die includes a base and a positioning core. The base is provided with an inner hole. The positioning core is fixed in the inner hole of the base. An annular cavity for accommodating the end bearing is formed between the inner circumference of the inner hole and the outer circumference of the positioning core. A positioning protrusion matching the center hole of the mandrel is extended upward from the top of the positioning core. An outer step surface is formed between the positioning protrusion and the positioning core. When the bottom end of the pulley contacts the upper end surface of the base, the bottom end of the mandrel contacts the outer step surface.

[0006] The upper pressing structure comprises a first upper driving device and an upper pressing head, wherein the first upper driving device is used to drive the upper pressing head to move towards or away from the overrunning pulley on the pressing die;

[0007] The lower pressing structure comprises a lower driving device and a lower pressing head, wherein the lower driving device is used to drive the lower pressing head to move towards or away from the overrunning pulley on the pressing die.

[0008] In this solution, the pulley with the end bearing to be assembled is placed on the press-fitting die, and the positioning protrusion of the positioning core is inserted into the center hole of the core shaft. One end bearing is pressed between the pulley and the core shaft by the upper pressing head driven by the first upper driving device from above the pulley, and the other end bearing is pre-placed in the annular cavity of the press-fitting die, and then the lower pressing head is driven by the lower driving device to press it between the pulley and the core shaft. In this way, during the assembly process of the two end bearings, positioning is performed with the same reference, avoiding repeated switching of the assembly reference, ensuring the stability of the rear face distance after assembly, and at the same time improving the assembly efficiency, while reducing one press-fitting equipment and operators, thereby reducing production costs.

[0009] Furthermore, the upper press-fitting structure also includes a second upper driving device and a pressure plate for pressing the pulley, the second upper driving device is used to drive the pressure plate to move closer to or away from the overrunning pulley on the press-fitting mold; when the lower pressure head presses upward to press the end bearing located below, the second upper driving device drives the pressure plate to move downward in advance to press the pulley on the press-fitting mold to prevent the pulley from moving upward when the lower pressure head presses the end bearing below, thereby ensuring assembly accuracy and improving the qualified rate of assembly.

[0010] Furthermore, the upper pressure head is fixedly mounted on the base plate, the first upper driving device is transmission-connected to the base plate, a chuck for clamping the end bearing is slidably mounted on the base plate, the bottom end of the chuck protrudes downward from the bottom end of the upper pressure head, a spring is arranged between the chuck and the base plate, one end of the spring abuts against the base plate, and the other end abuts against the chuck; the end bearing located above is clamped by the chuck to facilitate automatic assembly of the end bearing, when the first upper driving device drives the base plate to move downward, the upper pressure head, the chuck and the end bearing clamped by them move downward synchronously until the chuck abuts against the top end of the core shaft, as the base plate continues to move downward, the spring is compressed and stores energy, the upper pressure head moves downward relative to the chuck, and pushes the end bearing on the chuck to move downward, so that the end bearing is pressed between the pulley and the core shaft, and when the first upper driving device drives the base plate to move upward, the chuck is reset under the action of the spring.

[0011] Furthermore, the chuck is inserted into the upper pressure head and is slidably connected to the upper pressure head. The top end of the chuck has a flange, and the upper pressure head has an inner step surface, and the flange contacts the inner step surface. By utilizing the cooperation between the flange and the inner step surface, the chuck can be axially limited on the upper pressure head to prevent the chuck from falling off the upper pressure head.

[0012] Furthermore, the chuck is an elastic chuck, the end bearing is sleeved outside the elastic chuck, and the elastic chuck has a plurality of radially elastically retractable jaws distributed along the circumference, and the jaws abut against the inner circumferential surface of the end bearing.

[0013] Furthermore, a bottom plate is fixed to the lower end of the base, and at least one pressure head hole is penetrated on the bottom plate, and the pressure head hole is communicated with the annular cavity, the positioning core is fixedly connected to the bottom plate, and the lower pressure head has a plurality of pressure head parts matching the pressure head holes, and the pressure head parts correspond to the pressure head holes one by one, and the pressure head holes are for the corresponding pressure head parts to pass through; the setting of the bottom plate can support the end bearing located in the annular cavity, and is convenient for fixing the positioning core, and is convenient for replacing positioning cores of different specifications, and is also convenient for production and manufacturing.

[0014] Furthermore, the diameter of the outer circumferential surface of the positioning core is consistent with the diameter of the inner circumferential surface of the end bearing, so as to lock the radial position of the end bearing in the annular cavity and improve the assembly accuracy.

[0015] Furthermore, the base is fixed on a platform, the platform is fixedly connected to the frame, or the platform is installed on a rotating device, and the rotating device is used to drive the platform to rotate.

[0016] Furthermore, the first upper driving device and the lower driving device are both hydraulic cylinders or oil cylinders.

[0017] Furthermore, the second upper driving device is a hydraulic cylinder or an oil cylinder.

[0018] The beneficial effects of the present invention are as follows: the double-station bearing assembly mechanism of the overrunning pulley of the present invention can be positioned with the same reference during the assembly process of the two end bearings, thus avoiding repeated switching of the assembly reference, ensuring the stability of the distance between the end face of the pulley and the end bearing on its side after assembly, and at the same time reducing the number of positioning and clamping times when the pulley is installed with the end bearing, thereby improving assembly efficiency, reducing one pressing device and the required operators, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of a double-station bearing assembly mechanism for overrunning pulleys of the present invention;

[0021] Figure 2 yes Figure 1 A is a partial enlarged schematic diagram;

[0022] Figure 3 yes Figure 1 A partial enlarged schematic diagram of B in the middle;

[0023] Figure 4 It is a schematic diagram of a press-fitting die in a double-station bearing assembly mechanism for overtaking pulleys of the present invention;

[0024] Figure 5is a schematic top view of a bottom plate in a press-fitting mold of the present invention;

[0025] Figure 6 is a schematic diagram of the lower pressure head in the present invention;

[0026] Figure 7 yes Figure 6 Schematic diagram of CC section;

[0027] Figure 8 is a schematic diagram of a chuck in the present invention;

[0028] Fig. 9 is a bottom view schematic diagram of the chuck in the present invention;

[0029] Fig.10 It is a schematic diagram of the overrunning pulley in the present invention.

[0030] In the figure: 1, overrunning pulley, 11, pulley, 12, one-way bearing, 13, mandrel, 131, center hole, 14, end bearing;

[0031] 2. Rack;

[0032] 3. Press-fitting die, 31. base, 32. positioning core, 321. positioning protrusion, 322. outer step surface, 33. annular cavity, 34. bottom plate, 341. pressing head hole;

[0033] 4. upper pressing structure, 41. first upper driving device, 42. upper pressing head, 421. inner step surface, 43. second upper driving device, 44. pressing plate, 45. base plate, 46. clamping head, 461. flange, 462. clamping claw, 47. spring;

[0034] 5. lower pressing structure, 51. lower driving device, 52. lower pressing head, 521. pressing head;

[0035] 6. Platform. DETAILED DESCRIPTION

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0037] Example 1

[0038] like Figure 1-10As shown, a double-station bearing assembly mechanism of an overrunning pulley, the overrunning pulley 1 includes a pulley 11, a one-way bearing 12, a core shaft 13 and two end bearings 14, the pulley 11 is coaxially arranged outside the core shaft 13, the one-way bearing 12 is located between the pulley 11 and the core shaft 13, the two end bearings 14 are respectively located at both ends of the one-way bearing 12, and are both located between the pulley 11 and the core shaft 13, the core shaft 13 has a center hole 131, the assembly mechanism includes a frame 2, a press-fitting mold 3, and an upper press-fitting structure 4 and a lower press-fitting structure 5 arranged on the frame 2, the upper press-fitting structure 4 is located above the press-fitting mold 3, and the lower press-fitting structure 5 is located below the press-fitting mold 3;

[0039] The press-fitting mold 3 includes a base 31 and a positioning core 32. The base 31 is provided with an inner hole. The positioning core 32 is fixed in the inner hole of the base 31. An annular cavity 33 for accommodating the end bearing 14 is formed between the inner circumference of the inner hole and the outer circumference of the positioning core 32. A positioning protrusion 321 matching the center hole 131 of the mandrel 13 is extended upward from the top of the positioning core 32. An outer step surface 322 is formed between the positioning protrusion 321 and the positioning core 32. When the bottom end of the pulley 11 contacts the upper end surface of the base 31, the bottom end of the mandrel 13 contacts the outer step surface 322.

[0040] The upper pressing structure 4 includes a first upper driving device 41 and an upper pressing head 42. The first upper driving device 41 is used to drive the upper pressing head 42 to move closer to or away from the overrunning pulley 1 on the pressing mold 3.

[0041] The lower pressing structure 5 includes a lower driving device 51 and a lower pressing head 52 . The lower driving device 51 is used to drive the lower pressing head 52 to move toward or away from the overrunning pulley 1 on the pressing mold 3 .

[0042] The upper press-fitting structure 4 also includes a second upper driving device 43 and a pressing plate 44 for pressing the pulley 11. The second upper driving device 43 is used to drive the pressing plate 44 to move closer to or away from the overrunning pulley 1 on the press-fitting mold 3; when the lower pressing head 52 presses the end bearing 14 located below upward, the second upper driving device 43 can drive the pressing plate 44 to move downward to press the pulley 11 on the press-fitting mold 3, preventing the pulley 11 from moving upward when the lower pressing head 52 presses the end bearing 14 below, thereby ensuring assembly accuracy and improving the qualified rate of assembly.

[0043] The upper pressing head 42 is fixedly mounted on the base plate 45, the first upper driving device 41 is transmission-connected to the base plate 45, a chuck 46 for clamping the end bearing 14 is slidably mounted on the base plate 45, the bottom end of the chuck 46 protrudes downward from the bottom end of the upper pressing head 42, a spring 47 is arranged between the chuck 46 and the base plate 45, one end of the spring 47 abuts against the base plate 45, and the other end abuts against the chuck 46; the end bearing 14 located above is clamped by the chuck 46, so as to realize the automatic assembly of the end bearing 14, when When the first upper driving device 41 drives the base plate 45 to move downward, the upper pressure 42, the chuck 46 and the end bearing 14 clamped by them move downward synchronously until the chuck 46 contacts the top end of the core shaft 13. As the base plate 45 continues to move downward, the spring 47 is compressed and stores energy, and the upper pressure head 42 moves downward relative to the chuck 46, and pushes the end bearing 14 on the chuck 46 to move downward, so that the end bearing 14 is pressed between the pulley 11 and the core shaft 13. When the first upper driving device 41 drives the base plate 45 to move upward, the chuck 46 is reset under the action of the spring 47.

[0044] The chuck 46 is inserted into the upper pressure head 42 and is slidably connected to the upper pressure head 42. The top end of the chuck 46 has a flange 461. The upper pressure head 42 has an inner step surface 421. The flange 461 contacts the inner step surface 421. By utilizing the cooperation between the flange 461 and the inner step surface 421, the chuck 46 can be axially limited on the upper pressure head 42 to prevent the chuck 46 from falling off the upper pressure head 42.

[0045] The chuck 46 is an elastic chuck, and the end bearing 14 is sleeved outside the elastic chuck. The elastic chuck has a plurality of radially elastically retractable jaws 462 distributed along the circumference, and the jaws 462 abut against the inner circumference of the end bearing 14 .

[0046] A bottom plate 34 is fixed to the lower end of the base 31, and at least one pressure head hole 341 is penetrated on the bottom plate 34, and the pressure head hole 341 is communicated with the annular cavity 33. The positioning core 32 is fixedly connected to the bottom plate 34, and the lower pressure head 52 has a plurality of pressure head parts 521 matching the pressure head holes 341, and the pressure head parts 521 correspond to the pressure head holes 341 one by one, and the pressure head holes 341 are for the corresponding pressure head parts 521 to pass through; the setting of the bottom plate 34 can support the end bearing 14 located in the annular cavity 33, and is convenient for fixing the positioning core 32, and is convenient for replacing the positioning core 32 of different specifications, and is convenient for production and manufacturing.

[0047] The diameter of the outer circumference of the positioning core 32 is consistent with the diameter of the inner circumference of the end bearing 14, so as to lock the radial position of the end bearing 14 in the annular cavity 33 and improve the assembly accuracy.

[0048] The base 31 is fixed on the platform 6, and the platform 6 is fixedly connected to the frame 2, or the platform 6 is installed on a rotating device, and the rotating device is used to drive the platform 6 to rotate; it is worth noting that when the platform 6 is installed on the rotating device, a plurality of press-fitting molds 3 can be arranged on the platform 6 to realize multi-station operation, and the rotating device can specifically include a motor and a reducer, the output end of the motor and the input end of the reducer are transmission-connected, and the output end of the reducer is fixedly connected to the platform 6.

[0049] The first upper drive device 41 and the lower drive device 51 are both hydraulic cylinders or oil cylinders; the second upper drive device 43 is a hydraulic cylinder or oil cylinder; during specific installation, the first upper drive device 41 and the second upper drive device 43 are fixedly connected to each other and coaxially arranged, the first upper drive device 41 is fixed on the frame 2, the output end of the first upper drive device 41 is fixedly connected to the base plate 45, the output end of the second upper drive device 43 is fixedly connected to the pressure plate 44 through a connecting rod, and the lower drive device 51 is fixed on the frame 2, and the output end of the lower drive device 51 is fixedly connected to the lower pressure head 52.

[0050] In this embodiment, the axis of the upper press head 42, the axis of the clamp 46, the axis of the lower press head 52, the axis of the positioning core 32 and the axis of the positioning protrusion 321 coincide with each other; the end bearing 14 in this embodiment is a ball bearing.

[0051] The working process of the double-station bearing assembly mechanism of the overrunning pulley in this embodiment is as follows:

[0052] First, an end bearing 14 is placed in the annular cavity 33 of the press-fitting die 3, and the end bearing 14 is the end bearing 14 located at the bottom. Then, another bearing to be press-fitted is placed on the chuck 46, and is pressed inward by the chuck 46 to clamp the end bearing 14, and the end bearing 14 is located at the top.

[0053] Next, the pulley 11 with the end bearing 14 to be assembled is placed on the press-fitting die 3, and the positioning protrusion 321 of the positioning core 32 is inserted into the central hole 131 of the mandrel 13, the bottom end of the pulley 11 contacts the upper end surface of the base 31, and the bottom end of the mandrel 13 contacts the outer step surface 322. At this time, the axis of the positioning protrusion 321, the axis of the end bearing 14 clamped by the chuck 46, and the axis of the end bearing 14 in the annular cavity 33 coincide with each other.

[0054] Then, the first upper driving device 41 drives the base plate 45 to move downward, and the upper pressure head 42, the clamping head 46 and the end bearing 14 clamped by them move downward synchronously until the clamping head 46 abuts against the top end of the core shaft 13. As the base plate 45 continues to move downward, the spring 47 is compressed and stores energy, and the upper pressure head 42 moves downward relative to the clamping head 46, and pushes the end bearing 14 on the clamping head 46 to move downward, so that the end bearing 14 is pressed into between the pulley 11 and the core shaft 13, completing the press-fitting of the end bearing 14 located at the top. At this time, the clamping head 46 and the upper pressure head 42 stop and keep pressing the core shaft 13 and the end bearing 14, that is, the upper pressure head 42 and the clamping head 46 switch to play a role of pressing the core shaft 13 and the end bearing 14 located at the top when pressing the end bearing 14 located at the bottom;

[0055] Subsequently, the lower driving device 51 drives the lower pressing head 52 to move upward, and the pressing head portion 521 of the lower pressing head 52 passes through the corresponding pressing head hole 341 and enters the annular cavity 33, and then the pressing head portion 521 pushes the end bearing 14 in the annular cavity 33 upward and presses it between the pulley 11 and the core shaft 13, thereby completing the press-fitting of the end bearing 14 located below;

[0056] Finally, the first upper driving device 41 , the second upper driving device 43 and the lower driving device 51 are reset.

[0057] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A double-station bearing assembly mechanism for an overrunning pulley, the overrunning pulley (1) comprising a pulley (11), a one-way bearing (12), a core shaft (13) and two end bearings (14), the pulley (11) being coaxially arranged outside the core shaft (13), the one-way bearing (12) being located between the pulley (11) and the core shaft (13), the two end bearings (14) being located at two ends of the one-way bearing (12) and both being located between the pulley (11) and the core shaft (13), the core shaft (13) having a center hole (131), characterized in that: The assembly mechanism comprises a frame (2), a press-fitting die (3), and an upper press-fitting structure (4) and a lower press-fitting structure (5) arranged on the frame (2), wherein the upper press-fitting structure (4) is located above the press-fitting die (3), and the lower press-fitting structure (5) is located below the press-fitting die (3); The press-fitting mold (3) comprises a base (31) and a positioning core (32), wherein the base (31) is provided with an inner hole, the positioning core (32) is fixed in the inner hole of the base (31), an annular cavity (33) for accommodating an end bearing (14) is formed between the inner circumference of the inner hole and the outer circumference of the positioning core (32), a positioning protrusion (321) matching the center hole (131) of the core shaft (13) is extended upward from the top end of the positioning core (32), an outer step surface (322) is formed between the positioning protrusion (321) and the positioning core (32), and when the bottom end of the pulley (11) contacts the upper end surface of the base (31), the bottom end of the core shaft (13) contacts the outer step surface (322); The upper pressing structure (4) comprises a first upper driving device (41) and an upper pressing head (42), wherein the first upper driving device (41) is used to drive the upper pressing head (42) to move towards or away from the overrunning pulley (1) on the pressing die (3); The lower pressing structure (5) comprises a lower driving device (51) and a lower pressing head (52), wherein the lower driving device (51) is used to drive the lower pressing head (52) to move towards or away from the overrunning pulley (1) on the pressing die (3); The upper pressing structure (4) further comprises a second upper driving device (43) and a pressing plate (44) for pressing the pulley (11), wherein the second upper driving device (43) is used to drive the pressing plate (44) to move towards or away from the overrunning pulley (1) on the pressing die (3); The upper pressing head (42) is fixedly mounted on the base plate (45), the first upper driving device (41) is drivingly connected to the base plate (45), a chuck (46) for clamping the end bearing (14) is slidably mounted on the base plate (45), the bottom end of the chuck (46) protrudes downward from the bottom end of the upper pressing head (42), a spring (47) is provided between the chuck (46) and the base plate (45), one end of the spring (47) abuts against the base plate (45), and the other end abuts against the chuck (46).

2. The double-station bearing assembly mechanism for the overrunning pulley according to claim 1 is characterized in that: The chuck (46) is inserted into the upper pressing head (42) and is slidably connected to the upper pressing head (42); the top end of the chuck (46) has a flange (461); the upper pressing head (42) has an inner step surface (421); the flange (461) is in contact with the inner step surface (421).

3. The double-station bearing assembly mechanism for the overrunning pulley according to claim 1 is characterized in that: The chuck (46) is an elastic chuck, the end bearing (14) is sleeved outside the elastic chuck, the elastic chuck has a plurality of radially elastically retractable jaws (462) distributed along the circumference, and the jaws (462) abut against the inner circumferential surface of the end bearing (14).

4. The double-station bearing assembly mechanism for the overrunning pulley according to claim 1 is characterized in that: A bottom plate (34) is fixed at the lower end of the base (31), at least one pressure head hole (341) is penetrated through the bottom plate (34), the pressure head hole (341) is communicated with the annular cavity (33), the positioning core (32) is fixedly connected to the bottom plate (34), the lower pressure head (52) has a plurality of pressure head portions (521) matching the pressure head holes (341), the pressure head portions (521) correspond to the pressure head holes (341) one by one, and the pressure head holes (341) are for the corresponding pressure head portions (521) to pass through.

5. The double-station bearing assembly mechanism for overrunning pulleys according to claim 1, characterized in that: The diameter of the outer circumference of the positioning core (32) is consistent with the diameter of the inner circumference of the end bearing (14).

6. The double-station bearing assembly mechanism for the overrunning pulley according to claim 5, characterized in that: The base (31) is fixed on a platform (6), and the platform (6) is fixedly connected to the frame (2), or the platform (6) is installed on a rotating device, and the rotating device is used to drive the platform (6) to rotate.

7. The double-station bearing assembly mechanism for the overrunning pulley according to claim 1, characterized in that: The first upper drive device (41) and the lower drive device (51) are both hydraulic cylinders or oil cylinders.

8. The double-station bearing assembly mechanism for overrunning pulleys according to claim 1, characterized in that: The second upper driving device (43) is a hydraulic cylinder or an oil cylinder.

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