Automatic nut locking equipment and method for bicycle hub

Abstract

The invention provides an automatic nut locking device and method for a bicycle hub, which solves the problem that the hub needs to be manually turned over to tighten a nut, the operation process does not need to independently use manpower, the device automatically finishes the operation, the operation steps are simplified, the assembly requirement is met, and the working hours and the manpower are saved. A back plate is arranged on the base; a product bearing seat capable of being driven to rotate is arranged at the position, in front of the back plate, of the base, and a plurality of station holes used for containing hubs are formed in the product bearing seat; an upper nut locking mechanism and a lower nut locking mechanism which can move up and down are arranged on the front side face of the back plate, an upper nut lock head capable of rotationally locking an upper nut is arranged on the bottom side of the upper nut locking mechanism, and a lower nut lock head capable of rotationally locking a lower nut is arranged on the top side of the lower nut locking mechanism; an upper pre-pressing mechanism and a lower pre-pressing mechanism are further arranged at the position, between the upper nut locking mechanism and the lower nut locking mechanism, of the front side face of the back plate.

Description

Technical Field

[0001] The invention relates to the field of bicycle manufacturing, in particular to the field of bicycle loose bead hub assembly, and specifically to a bicycle hub automatic nut locking device and method. Background Art

[0002] In the bicycle manufacturing process, the loose bead hub is a relatively important component, so when producing bicycles, the assembly quality of the loose bead hub is strictly controlled. Figure 1 As shown, both ends of the hub are equipped with pre-pressed pieces, and the ends of the pre-pressed pieces are also equipped with nuts for locking.

[0003] The two ends of the hub are locked with nuts to tighten the pre-stressed parts on both sides, but the current operation method of this process is to use a wrench to lock it manually, and the two ends need to be locked twice. The general steps are: there is a slot on the jig, and the operator holds the lower end of the hub with one hand to make the upper pre-stressed part stuck in the slot of the jig, and the rotation of the pre-stressed part is limited by the slot. Then, the operator holds the wrench in the other hand to tighten the nut on the upper section to lock the pre-stressed part. First lock one end, and turn the hub over to lock the other end.

[0004] The above method not only has repetitive and cumbersome processes, low efficiency, and occupies a lot of manpower, but also cannot guarantee the tightening quality, and requires a lot of rework in quality control management. Summary of the invention

[0005] The present invention provides a bicycle hub automatic nut locking device and method, which solves the problem of manually turning over the hub to tighten the nut. The operation process does not require separate manpower and is completed automatically by the device, which not only simplifies the operation steps and meets the assembly requirements, but also saves working time and manpower.

[0006] The present invention is achieved through the following technical solutions:

[0007] A bicycle hub automatic nut locking device comprises a base, wherein a back plate is arranged on the base;

[0008] The base is provided with a product holder capable of driving rotation in front of the back plate, and the product holder is provided with a plurality of workstation holes for placing the hub;

[0009] The front side of the back plate is provided with an upper nut locking mechanism and a lower nut locking mechanism that can move up and down, the bottom side of the upper nut locking mechanism is provided with an upper nut locking head that can rotate and lock the upper nut, and the top side of the lower nut locking mechanism is provided with a lower nut locking head that can rotate and lock the lower nut;

[0010] An upper prestressing mechanism and a lower prestressing mechanism are also provided on the front side of the back plate between the upper nut locking mechanism and the lower nut locking mechanism. An upper prestressing wrench that can move forward and backward is provided on the front side of the upper prestressing mechanism, and a lower prestressing wrench that can move forward and backward is provided on the front side of the lower prestressing mechanism.

[0011] Furthermore, the upper nut lock head and the lower nut lock head both include a lock head base, and a polygonal countersunk hole is provided on the surface of the lock head base.

[0012] Further, the upper nut locking mechanism includes a first lifting device and a first nut lock head driving mechanism, the first nut lock head driving mechanism is connected to the front side of the back plate by sliding up and down through a linear guide pair, the first lifting device is arranged on the front side of the back plate, the movable end of the first lifting device is connected to the first nut lock head driving mechanism, and the output end of the first nut lock head driving mechanism is connected to the upper nut lock head;

[0013] The lower nut locking mechanism includes a second lifting device and a second nut lock head driving mechanism, the second nut lock head driving mechanism is connected to the front side of the back plate through a linear guide pair for sliding up and down, the second lifting device is arranged on the front side of the back plate, the movable end of the second lifting device is connected to the second nut lock head driving mechanism, and the output end of the second nut lock head driving mechanism is connected to the lower nut lock head.

[0014] Further, the first nut lock head driving mechanism and the second nut lock head driving mechanism both include a mobile frame, a driving pulley and a driven pulley are rotatably mounted in the mobile frame, the driving pulley is located behind the driven pulley and is connected to the driven pulley through a belt, a first driving motor is provided at the bottom of the mobile frame, and an output shaft of the first driving motor is connected to the driving pulley;

[0015] The axial ends of the driven pulleys of the first nut lock head driving mechanism and the second nut lock head driving mechanism are correspondingly connected to the upper nut lock head and the lower nut lock head.

[0016] Furthermore, a positioning pin capable of being inserted into the shaft hole at the end of the hub is provided at the center of the countersunk hole.

[0017] Furthermore, the upper prestressing mechanism and the lower prestressing mechanism both include a third lifting device, which is laterally fixed to the front side of the back plate. The movable ends of the third lifting devices of the upper prestressing mechanism and the lower prestressing mechanism are respectively connected to the upper prestressing wrench and the lower prestressing wrench, and the front sides of the upper prestressing wrench and the lower prestressing wrench are provided with a U-shaped bayonet.

[0018] Furthermore, the product support is a disc structure, and a plurality of workstation holes are distributed in a ring under the product support. The bottom center position of the product support is rotatably mounted on the base through a rotating shaft. A second drive motor is provided at the bottom of the base, and the output shaft of the second drive motor is connected to the rotating shaft.

[0019] Furthermore, a dividing plate is provided at the lower part of the rotating shaft, and a plurality of positioning openings are evenly distributed on the outer circumference of the dividing plate;

[0020] A fourth lifting device is transversely arranged on the base, and a movable end of the fourth lifting device is connected to a positioning block, and the positioning block can extend into the positioning opening of the dividing plate.

[0021] Furthermore, the base is provided with a plurality of visual sensors for monitoring the status of the hub.

[0022] A bicycle hub automatic nut locking method, which uses the bicycle hub automatic nut locking device of the present invention to automatically lock the nut, comprising the following steps:

[0023] S01. Pre-install the upper nut and the lower nut on the upper and lower ends of the hub respectively, and vertically place the lower end of the hub on the work position hole of the product support;

[0024] S02, driving the product support to rotate, so that the hub to be processed rotates to the processing position;

[0025] S03, respectively controlling the upper nut locking mechanism and the lower nut locking mechanism to move, so that the upper nut locking head is matched with the upper nut of the hub, and the lower nut locking head is matched with the lower nut of the hub;

[0026] S04, respectively controlling the upper preloading mechanism and the lower preloading mechanism, so that the upper preloading wrench and the lower preloading wrench are respectively matched with the upper preloading part and the lower preloading part of the hub, thereby limiting the hub;

[0027] S05, controlling the upper nut locking head to rotate and lock the upper nut through the upper nut locking mechanism, and controlling the lower nut locking head to rotate and lock the lower nut through the lower nut locking mechanism;

[0028] S06, the upper pre-pressing mechanism, the lower pre-pressing mechanism, the upper nut locking mechanism and the lower nut locking mechanism are reset, and the product holder is rotated to move the next hub to be processed to the processing position;

[0029] S07. Repeat steps S02-S06 to complete the tightening of the upper nut and the lower nut of the hub.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The bicycle hub automatic nut locking device of the present invention can automatically lock the nuts at the upper and lower ends of the hub without turning over the hub or using manpower alone. The device can complete the process automatically, which not only simplifies the operation steps, but also meets the assembly requirements, improves work efficiency and saves labor.

[0032] The bicycle hub automatic nut locking method of the present invention adopts the bicycle hub automatic nut locking device of the present invention to automatically lock the nut, which not only ensures the assembly quality, but also improves the work efficiency and saves labor;

[0033] 2. The upper nut locking mechanism includes a first lifting device and a first nut locking head driving mechanism, and the lower nut locking mechanism includes a second lifting device and a second nut locking head driving mechanism, which can respectively control the first nut locking head driving mechanism and the second nut locking head driving mechanism to move up and down relative to each other, and can accurately cooperate with the nuts at the upper and lower ends of the hub;

[0034] 3. A positioning pin that can be inserted into the shaft hole at the end of the hub is provided at the center of the countersunk hole. When the upper nut lock head and the lower nut lock head are close to the upper and lower ends of the hub, the positioning pin is inserted into the shaft hole at the end of the hub to achieve accurate positioning, ensuring that the countersunk hole can accurately match the nuts at both ends of the hub, thereby improving the accuracy of the equipment;

[0035] 4. The fourth lifting device controls the positioning block to cooperate with the positioning port of the indexing plate to achieve rapid locking of the product seat, thereby preventing the product seat from rotating when tightening the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of hub assembly in the prior art;

[0037] Figure 2 This is an overall schematic diagram of the automatic nut locking device for a bicycle hub according to the present invention;

[0038] Figure 3 It is a side view of the automatic nut locking device for a bicycle hub according to the present invention;

[0039] Figure 4 This is a schematic diagram of the interior of the first nut lock drive mechanism of the present invention;

[0040] Figure 5 It is a schematic diagram of the upper pre-pressing mechanism and the lower pre-pressing mechanism of the present invention;

[0041] In the figure: 1, base, 2, back plate, 3, product holder, 31, work station hole, 32, second drive motor, 33, indexing plate, 34, fourth lifting device, 35, positioning block, 36, visual sensor, 4, first lifting device, 5, first nut lock drive mechanism, 51, mobile frame, 52, driving pulley, 53, driven pulley, 54, positioning pin, 55, first drive motor, 56, upper nut lock, 6, second lifting device, 7, second nut lock drive mechanism, 71, lower nut lock, 8, upper pre-pressing mechanism, 81, third lifting device, 82, upper pre-pressing wrench, 9, lower pre-pressing mechanism, 91, lower pre-pressing wrench, DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0043] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or coupling. The term "and / or" used herein includes any unit and all combinations of one or more associated listed items.

[0044] In order to solve the technical problems of the background technology, this embodiment discloses a bicycle hub automatic nut locking device, such as Figure 2 As shown, it mainly includes a base 1, a back plate 2, a product holder 3, an upper nut locking mechanism, a lower nut locking mechanism, an upper pre-pressing mechanism 8 and a lower pre-pressing mechanism 9. Among them, the base 1 is made of a metal frame and is used to carry the entire device. The back plate 2 is fixed to the base 1 by a bolt assembly and is reinforced as a whole by a rib plate.

[0045] like Figure 3As shown, the upper nut locking mechanism and the lower nut locking mechanism are integrally assembled on the front side of the back plate 2. The upper nut locking mechanism includes a first lifting device 4 and a first nut lock head driving mechanism 5. The first nut lock head driving mechanism 5 is connected to the front side of the back plate 2 by sliding up and down through a conventional linear guide pair. The first lifting device 4 is fixed to the front side of the back plate 2. The movable end of the first lifting device 4 is vertically downward and fixedly connected to the top of the first nut lock head driving mechanism 5. The first lifting device 4 can control the first nut lock head driving mechanism 5 to move up and down. The lower nut locking mechanism includes a second lifting device 6 and a second nut lock head driving mechanism 7. The second nut lock head driving mechanism 7 is connected to the front side of the back plate 2 by sliding up and down through a linear guide pair and is located below the first nut lock head driving mechanism 5. The second lifting device 6 is fixed to the front side of the back plate 2. The movable end of the second lifting device 6 is vertically upward and connected to the bottom of the second nut lock head driving mechanism 7. The second lifting device 6 can control the second nut lock head driving mechanism 7 to move up and down.

[0046] In this embodiment, if Figure 4 As shown, the first nut lock head driving mechanism 5 and the second nut lock head driving mechanism 7 have the same structure and both include a moving frame 51, the moving frame 51 contains a cavity, a driving pulley 52 and a driven pulley 53 are rotatably installed in the moving frame 51 through a rotating shaft, the driving pulley 52 is located behind the driven pulley 53 and is connected to the driven pulley 53 through a belt, and a first driving motor 55 is installed at the bottom of the rear end of the moving frame 51, and the output shaft of the first driving motor 55 is connected to the driving pulley 52.

[0047] The axial ends of the driven pulleys 53 of the first nut lock drive mechanism 5 and the second nut lock drive mechanism 7 are correspondingly fixedly connected with an upper nut lock 56 and a lower nut lock 71. The upper nut lock 56 and the lower nut lock 71 both include a lock base 1. The surface of the lock base 1 is processed with a polygonal countersunk hole. The countersunk hole needs to match the nut of the hub. In this embodiment, the nut of the hub has a hexagonal profile, and the countersunk hole should also be hexagonal. The upper and lower ends of the hub generally have axial holes. In order to facilitate positioning, a positioning pin 54 that can be inserted into the axial hole at the end of the hub is installed at the center of the countersunk hole. When the countersunk hole of the lock base 1 is aligned with the nut, the positioning pin 54 can be inserted into the axial hole at the end of the hub.

[0048] like Figure 5As shown, the upper pre-stressing mechanism 8 and the lower pre-stressing mechanism 9 are correspondingly installed on the front side of the back plate 2, and the two are distributed up and down, and are located between the upper nut locking mechanism and the lower nut locking mechanism. The upper pre-stressing mechanism 8 and the lower pre-stressing mechanism 9 both include a third lifting device 81, and the third lifting device 81 is transversely fixed on the front side of the back plate 2. The movable ends of the third lifting devices 81 of the upper pre-stressing mechanism 8 and the lower pre-stressing mechanism 9 are respectively connected to the upper pre-stressing wrench 82 and the lower pre-stressing wrench 91, so that the upper pre-stressing wrench 82 and the lower pre-stressing wrench 91 can be controlled to move forward and backward respectively. A U-shaped bayonet is processed on the front side of the upper pre-stressing wrench 82 and the lower pre-stressing wrench 91. When the upper pre-stressing wrench 82 and the lower pre-stressing wrench 91 extend forward, the bayonet can be stuck on the outside of the pre-stressing parts at the upper and lower ends of the hub, and can limit the rotation of the hub pre-stressing parts. The upper and lower distances between the upper pre-stressing wrench 82 and the lower pre-stressing wrench 91 depend on the spacing between the pre-stressing parts at the upper and lower ends of the hub.

[0049] The product holder 3 is a disc structure, and is provided with a plurality of workstation holes 31 distributed in an annular manner. The lower end of the hub is vertically placed on the workstation hole 31. In this embodiment, the number of the workstation holes 31 is 6, and a maximum of 6 hubs can be carried. The bottom center position of the product holder 3 is swivel-mounted on the base 1 through a rotating shaft, and a second drive motor 32 is installed at the bottom of the base 1, and the output shaft of the second drive motor 32 is connected to the rotating shaft. A dividing plate 33 is coaxially fixed at the lower part of the rotating shaft, and 6 positioning openings are evenly distributed on the outer circumference of the dividing plate 33. The positioning openings and the workstation holes 31 have the same angular distribution in the circumferential direction. A fourth lifting device 34 is horizontally arranged on the base 1, and a positioning block 35 is connected to the movable end of the fourth lifting device 34, and the positioning block 35 can extend into the positioning opening of the dividing plate 33. With such a design, the fourth lifting device 34 controls the positioning block 35 to cooperate with the positioning opening of the indexing plate 33 to realize the rapid locking of the product holder 3, thereby preventing the product holder 3 from rotating when the nut is tightened. In order to monitor the state of the hub, a plurality of visual sensors 36 for monitoring the state of the hub are installed on the base 1. The visual sensors 36 are conventional electrical components that can monitor the state of the hub.

[0050] In this embodiment, the first lifting device 4, the second lifting device 6, the third lifting device 81 and the fourth lifting device 34 all adopt conventional cylinder elements, and their extension and retraction are controlled by air pressure.

[0051] The above-mentioned bicycle hub automatic nut locking device is used to automatically lock the nut. This embodiment also discloses a bicycle hub automatic nut locking method, which includes the following steps:

[0052] S01. Pre-install the upper nut and the lower nut at the upper and lower ends of the hub respectively. At this time, the upper nut and the lower nut are not tightened, and the lower end of the hub is vertically placed on the work position hole 31 of the product holder 3;

[0053] S02, the product holder 3 is driven to rotate by the second driving motor 32, so that the hub to be processed is rotated to the processing position, and the fourth lifting device 34 controls the positioning block 35 to extend into the positioning opening of the indexing plate 33 to lock the product holder 3;

[0054] S03, respectively controlling the upper nut locking mechanism and the lower nut locking mechanism to move by the first lifting device 4 and the second lifting device 6, so that the upper nut locking head 56 is matched with the upper nut of the hub, and the lower nut locking head 71 is matched with the lower nut of the hub;

[0055] S04, respectively controlling the upper pre-pressing mechanism 8 and the lower pre-pressing mechanism 9 by the third lifting device 81, so that the upper pre-pressing wrench and the lower pre-pressing wrench 91 are respectively extended forward to fit on the upper pre-pressing part and the lower pre-pressing part of the hub, thereby limiting the hub and preventing it from rotating;

[0056] S05, the first drive motor 55 is started, and the upper nut locking mechanism controls the upper nut locking head 56 to rotate and lock the upper nut, and the lower nut locking mechanism controls the lower nut locking head 71 to rotate and lock the lower nut;

[0057] S06, after the nut locking operation of the hub is completed, the fourth lifting device 34, the upper pre-pressing mechanism 8, the lower pre-pressing mechanism 9, the upper nut locking mechanism and the lower nut locking mechanism are reset, and the product holder 3 is rotated to move the next hub to be processed to the processing position;

[0058] S07. Repeat steps S02-S06 to complete the locking of the upper nut and the lower nut of the hub. The visual sensor 36 monitors the status of the hub at all times. When the hubs on each station hole 31 of the product holder 3 are processed, the operator replaces the hub.

[0059] By means of the bicycle hub automatic nut locking device and method of the present invention, the nuts at the upper and lower ends of the hub are automatically locked without turning over the hub or using manpower separately. The device automatically completes the process, which not only simplifies the operation steps and meets the assembly requirements, but also improves work efficiency and saves labor.

Claims

1. A bicycle hub automatic nut locking device, characterized in that: It comprises a base, on which a back plate is arranged; The base is provided with a product holder capable of driving rotation in front of the back plate, and the product holder is provided with a plurality of workstation holes for placing the hub; The front side of the back plate is provided with an upper nut locking mechanism and a lower nut locking mechanism that can move up and down, the bottom side of the upper nut locking mechanism is provided with an upper nut locking head that can rotate and lock the upper nut, and the top side of the lower nut locking mechanism is provided with a lower nut locking head that can rotate and lock the lower nut; An upper prestressing mechanism and a lower prestressing mechanism are also provided on the front side of the back plate between the upper nut locking mechanism and the lower nut locking mechanism. An upper prestressing wrench that can move forward and backward is provided on the front side of the upper prestressing mechanism, and a lower prestressing wrench that can move forward and backward is provided on the front side of the lower prestressing mechanism.

2. The bicycle hub automatic nut locking device according to claim 1, characterized in that: The upper nut lock head and the lower nut lock head both include a lock head base, and the surface of the lock head base is provided with a polygonal countersunk hole.

3. The bicycle hub automatic nut locking device according to claim 2, characterized in that: The upper nut locking mechanism comprises a first lifting device and a first nut lock head driving mechanism, the first nut lock head driving mechanism is connected to the front side of the back plate by sliding up and down through a linear guide pair, the first lifting device is arranged on the front side of the back plate, the movable end of the first lifting device is connected to the first nut lock head driving mechanism, and the output end of the first nut lock head driving mechanism is connected to the upper nut lock head; The lower nut locking mechanism includes a second lifting device and a second nut lock head driving mechanism, the second nut lock head driving mechanism is connected to the front side of the back plate through a linear guide pair for sliding up and down, the second lifting device is arranged on the front side of the back plate, the movable end of the second lifting device is connected to the second nut lock head driving mechanism, and the output end of the second nut lock head driving mechanism is connected to the lower nut lock head.

4. The bicycle hub automatic nut locking device according to claim 3, characterized in that: The first nut lock head driving mechanism and the second nut lock head driving mechanism both include a mobile frame, a driving pulley and a driven pulley are rotatably mounted in the mobile frame, the driving pulley is located behind the driven pulley and is connected to the driven pulley through a belt, a first driving motor is provided at the bottom of the mobile frame, and an output shaft of the first driving motor is connected to the driving pulley; The axial ends of the driven pulleys of the first nut lock head driving mechanism and the second nut lock head driving mechanism are correspondingly connected to the upper nut lock head and the lower nut lock head.

5. The bicycle hub automatic nut locking device according to claim 2, characterized in that: A positioning pin which can be inserted into the shaft hole at the end of the hub is arranged at the center of the countersunk hole.

6. The bicycle hub automatic nut locking device according to claim 1, characterized in that: The upper pre-stressing mechanism and the lower pre-stressing mechanism both include a third lifting device, which is laterally fixed to the front side of the back plate. The movable ends of the third lifting devices of the upper pre-stressing mechanism and the lower pre-stressing mechanism are respectively connected to the upper pre-stressing wrench and the lower pre-stressing wrench, and the front sides of the upper pre-stressing wrench and the lower pre-stressing wrench are provided with a U-shaped bayonet.

7. The bicycle hub automatic nut locking device according to claim 1, characterized in that: The product holder is a disc structure, and a plurality of workstation holes are distributed in a ring shape under the product holder. The bottom center position of the product holder is swivel mounted on the base via a rotating shaft. A second drive motor is provided at the bottom of the base, and an output shaft of the second drive motor is connected to the rotating shaft.

8. The bicycle hub automatic nut locking device according to claim 7, characterized in that: A dividing plate is provided at the lower part of the rotating shaft, and a plurality of positioning openings are evenly distributed on the outer circumference of the dividing plate; A fourth lifting device is transversely arranged on the base, and a movable end of the fourth lifting device is connected to a positioning block, and the positioning block can extend into the positioning opening of the dividing plate.

9. The bicycle hub automatic nut locking device according to any one of claims 1 to 8, characterized in that: The base is provided with a plurality of visual sensors for monitoring the status of the hub.

10. A method for automatically locking nuts of a bicycle hub, characterized in that: The bicycle hub automatic nut locking device according to any one of claims 1 to 9 is used to automatically lock the nut, which comprises the following steps: S01. Pre-install the upper nut and the lower nut on the upper and lower ends of the hub respectively, and vertically place the lower end of the hub on the work position hole of the product support; S02, driving the product support to rotate, so that the hub to be processed rotates to the processing position; S03, respectively controlling the upper nut locking mechanism and the lower nut locking mechanism to move, so that the upper nut locking head is matched with the upper nut of the hub, and the lower nut locking head is matched with the lower nut of the hub; S04, respectively controlling the upper preloading mechanism and the lower preloading mechanism, so that the upper preloading wrench and the lower preloading wrench are respectively matched with the upper preloading part and the lower preloading part of the hub, thereby limiting the hub; S05, controlling the upper nut locking head to rotate and lock the upper nut through the upper nut locking mechanism, and controlling the lower nut locking head to rotate and lock the lower nut through the lower nut locking mechanism; S06, the upper pre-pressing mechanism, the lower pre-pressing mechanism, the upper nut locking mechanism and the lower nut locking mechanism are reset, and the product holder is rotated to move the next hub to be processed to the processing position; S07. Repeat steps S02-S06 to complete the tightening of the upper nut and the lower nut of the hub.

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