Method for eliminating roller play of a roller bearing of a bottle blowing machine travelling clamp

Abstract

The application discloses a bottle blowing machine travelling clamp roller bearing roller play elimination method and relates to the technical field of bottle blowing machines.The clamp head is provided with a connecting hole with an internal thread on the lower side.The bottle blowing machine travelling clamp roller bearing roller play elimination method has strong impact resistance of the roller bearing outer mechanism, so that the friction and impact generated when the clamp is transferred between the transition discs are within the bearing range of the roller bearing outer mechanism, thereby guaranteeing the service life of the device and avoiding the occurrence of equipment impact failure.The positioning sleeve and the play ring enable the roller bearing outer mechanism to have the same precise positioning effect as the deep groove ball bearing, thereby solving the problem that, after the bearing is replaced, the bearing roller along the inner ring exceeds 2mm in the upstream play, the transition disc transfer clamp seat cannot precisely position the travelling clamp, and the bottle blowing machine equipment operation has a certain safety risk.

Description

Technical Field

[0001] This invention relates to the field of blow molding machine technology, specifically to a method for eliminating roller clearance in the roller bearing of a blow molding machine's accompanying fixture. Background Technology

[0002] A blow molding machine is a device that uses a blow molding process to produce hollow containers from plastic granules. Common types include one-step blow molding machines using PP and PE, two-step injection stretch blow molding machines using PET, PC, or PP, and newly developed multi-layer blow molding and stretch blow molding machines. Most blow molding machines are still two-step machines, meaning the plastic raw material must first be made into a preform before blowing. Currently, PET is commonly used as the environmentally friendly material. A blow molding machine uses airflow to blow liquid plastic into a mold cavity of a specific shape, thus creating a product. This type of machine is called a blow molding machine, also known as a hydraulic blow molding machine. A tubular plastic preform obtained from thermoplastic resin through extrusion or injection molding is placed in a split mold while hot or softened. After the mold is closed, compressed air is immediately introduced into the preform, causing it to inflate and adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are obtained. Rotary blow molding machines... The bearing on the traveling fixture is a 204 deep groove ball bearing. The fixture moves with the blow molding machine's main chain and directly enters the blow molding die for blow molding. Then, it is transferred through the transition plate fixture seat and re-enters the blow molding main chain. During the handover between the fixture transition plates, the outer ring of the bearing is precisely positioned by strong magnetic adsorption on the fixture seat. However, the bearing below the fixture experiences friction and collision with the guide plate during the tangential handover. Due to the insufficient impact resistance of the deep groove ball bearing, the outer ring of the bearing below the fixture is prone to cracking during blow molding operation, leading to equipment collision failure. To avoid this, a 204 cylindrical bearing with the same size and high impact resistance needs to be found for replacement. However, after replacement, the roller clearance along the inner ring exceeds 2mm, causing the transition plate fixture seat to be unable to accurately position the traveling fixture, thus posing a certain safety risk to the blow molding machine. Therefore, a method to eliminate the roller clearance of the roller bearing in the traveling fixture of the blow molding machine is proposed to solve this problem. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a method for eliminating the roller clearance of the roller bearing in the traveling fixture of a blow molding machine. This method solves the problem that in current rotary blow molding machines, after bearing replacement, the roller clearance along the inner ring exceeds 2mm, which leads to the transition plate handover fixture seat being unable to accurately position the traveling fixture, thus causing certain safety risks to the operation of the blow molding machine.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a method for eliminating roller clearance in a roller bearing of a blow molding machine's accompanying fixture, comprising a fixture head, wherein a connecting hole with an internal thread is provided on the lower side of the fixture head, and the connecting hole is connected to an external thread through the internal thread. The external thread is provided on the upper end of the fixture's central shaft. An upper bearing is movably connected to the lower end of the fixture head, and the inner ring of the upper bearing is movably connected to the outer surface of the fixture's central shaft. A positioning sleeve is movably connected to the lower end of the upper bearing, and the upper end of a clearance ring is movably connected to the lower end of the positioning sleeve. The clearance ring is movably connected to the outer surface of the fixture's central shaft, and a roller bearing inner ring is fitted to the lower end of the clearance ring. The inner ring of the roller bearing is movably connected to the fixture's central shaft, and an outer roller bearing mechanism is movably connected to the outer side of the inner ring of the roller bearing. The outer roller bearing mechanism is sleeved on the fixture's central shaft.

[0007] Preferably, the upper bearing is a 204 deep groove ball bearing.

[0008] Preferably, the clearance ring includes a connecting ring and a mortise block, wherein four mortise blocks are uniformly and fixedly connected to the inner layer of the connecting ring.

[0009] Preferably, the inner ring of the roller bearing replaces the connecting sleeve and the mortise groove, and the mortise groove is provided in four evenly spaced grooves on the upper end of the connecting sleeve.

[0010] Preferably, the four mortise blocks are mortised into four mortise grooves.

[0011] (III) Beneficial Effects

[0012] The beneficial effects of this invention are as follows:

[0013] This method for eliminating roller clearance in the roller bearings of the blow molding machine's accompanying fixture utilizes the high impact resistance of the roller bearing's outer mechanism. This ensures that the friction and impact generated during the transition between the fixtures on the transition plates are within the bearing's tolerance range, thus guaranteeing the device's service life and preventing equipment collision failures. Furthermore, through the positioning sleeve and clearance ring, the roller bearing's outer mechanism achieves the same precise positioning effect as a deep groove ball bearing. After reducing the incidence of equipment collision failures, the monthly downtime of the accompanying fixtures on the two blow molding machines on Line B decreased by approximately 0.5 hours, thereby shortening production time, reducing energy consumption, and improving production efficiency. In addition, by extending the service life of the bearings and fixture guide mechanisms, it reduces spare parts consumption and hardware wear, resulting in annual savings of approximately 12,000 yuan for the factory in bearing and bearing guide mechanism costs. This solves the problem that in current rotary blow molding machines, after bearing replacement, the roller clearance along the inner ring exceeds 2mm, causing the transition plate to fail to accurately position the accompanying fixture, thus posing a certain safety risk to the blow molding machine's operation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the bearing of the present invention;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning sleeve of the present invention;

[0017] Figure 4 This is a three-dimensional structural diagram of the outer mechanism of the roller bearing of the present invention;

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the clearance ring of the present invention;

[0019] Figure 6 This is a three-dimensional structural diagram of the clamp head of the present invention;

[0020] Figure 7 This is a schematic diagram of the three-dimensional two-dimensional structure of the clamp head of the present invention;

[0021] Figure 8 This is a schematic diagram of the three-dimensional structure of the inner ring of the roller bearing of the present invention;

[0022] Figure 9 This is a three-dimensional structural diagram of the central shaft of the fixture of the present invention.

[0023] In the diagram: 1. Fixture head, 2. Upper bearing, 3. Positioning sleeve, 4. Clearance ring, 41. Connecting ring, 42. Mating block, 5. Roller bearing outer mechanism, 6. Roller bearing inner ring, 61. Connecting sleeve, 62. Mating groove, 7. Fixture center shaft, 8. Internal thread, 9. External thread. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1-9 As shown, the present invention provides a technical solution: a method for eliminating roller backlash in a roller bearing of a blow molding machine's accompanying fixture, comprising a fixture head 1. The fixture head 1 is designed to connect to the body of the blow molding machine, thereby ensuring the structural functionality of the device. A connecting hole with an internal thread 8 is provided on the lower side of the fixture head 1, and the connecting hole is threaded with an external thread 9 through the internal thread 8. This is to stably connect the fixture head 1 to the fixture central shaft 7, thereby ensuring the stable connection between the device and the blow molding machine body. The external thread 9 is located at the upper end of the fixture central shaft 7. An upper bearing 2 is movably connected to the lower end of the fixture head 1. The inner ring of the upper bearing 2 is movably connected to the outer surface of the fixture central shaft 7. The upper bearing 2 is provided to ensure the precise positioning and structural functionality of the device, and also to cooperate with the positioning sleeve 3 to hold the rollers... The outer bearing mechanism 5 is positioned stably, thus ensuring the structural functionality of the device. A positioning sleeve 3 is movably connected to the lower end of the upper bearing 2. A clearance ring 4 is movably connected to the upper end of the lower end of the positioning sleeve 3. The clearance ring 4 is movably connected to the outer surface of the fixture's central shaft 7. The clearance ring 4 is designed to cooperate with the positioning sleeve 3 to stabilize the positions of the outer roller bearing mechanism 5 and the inner roller bearing ring 6, thus ensuring the device's functional practicality. The inner roller bearing ring 6 is fitted into the lower end of the clearance ring 4. The inner roller bearing ring 6 is movably connected to the fixture's central shaft 7. The outer roller bearing mechanism 5 is movably connected to the outer side of the inner roller bearing ring 6. The outer roller bearing mechanism 5 is designed to ensure that the device can withstand certain friction and impact, thus ensuring the device's service life. The outer roller bearing mechanism 5 is sleeved on the fixture's central shaft 7.

[0026] The upper bearing 2 is a 204 deep groove ball bearing, which is used to ensure the positioning accuracy of the device.

[0027] The clearance ring 4 includes a connecting ring 41 and a mortise block 42. The mortise block 42 is provided with four evenly fixedly connected to the inner layer of the connecting ring 41. Its purpose is to position the inner ring 6 of the roller bearing, thereby stabilizing the outer mechanism 5 of the roller bearing.

[0028] The inner ring 6 of the roller bearing replaces the connecting sleeve 61 and the mortise groove 62. The mortise groove 62 is provided with four evenly spaced grooves on the upper end of the connecting sleeve 61. Its purpose is to stably connect the clearance ring 4 and ensure the structural functionality of the device.

[0029] The four mortise blocks 42 and the four mortise grooves 62 are mortised to ensure the tight connection between the inner ring 6 of the roller bearing and the clearance ring 4, as well as the functional practicality of the inner ring 6 of the roller bearing, thereby ensuring the structural functionality of the device.

[0030] The operation steps of this invention are as follows:

[0031] The upper bearing 2 ensures the rotation of the device, while the clamp head 1 and all the structures in the device are connected through the clamp central shaft 7. Then, the clamp head 1 is connected to the blow molding machine body. When the blow molding machine is in use, the positioning sleeve 3, the clearance ring 4, and the inner ring 6 of the roller bearing eliminate the clearance of the rollers in the replaced outer mechanism 5 along the inner ring by more than 2mm. This allows for precise positioning of the accompanying clamp during the transition plate handover to the clamp seat, thereby avoiding safety risks in the operation of the blow molding machine and ensuring the functionality and practicality of the device.

[0032] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A roller backlash elimination device for roller bearings in a blow molding machine's accompanying clamp, comprising a clamp head (1), characterized in that: The clamp head (1) has a connecting hole with an internal thread (8) on its lower side, and the connecting hole is connected to an external thread (9) through the internal thread (8). The external thread (9) is located on the upper end of the clamp central shaft (7). The lower end of the clamp head (1) is movably connected to an upper bearing (2). The inner ring of the upper bearing (2) is movably connected to the outer surface of the clamp central shaft (7). The lower end of the upper bearing (2) is movably connected to a positioning sleeve (3). The lower end of the positioning sleeve (3) is movably connected to the upper end of a clearance ring (4). The clearance ring (4) is movably connected to the outer surface of the clamp central shaft (7). The lower end of the clearance ring (4) is fitted with a roller bearing inner ring (6). The inner ring (6) of the roller bearing is movably connected to the clamp central shaft (7). The outer side of the inner ring (6) of the roller bearing is movably connected to a roller bearing outer mechanism (5). The roller bearing outer mechanism (5) is sleeved on the clamp central shaft (7).

2. The roller backlash elimination device for the roller bearing of the blow molding machine's traveling clamp according to claim 1, characterized in that: The upper bearing (2) is a 204 deep groove ball bearing.

3. The roller backlash elimination device for the roller bearing of the blow molding machine's traveling clamp according to claim 1, characterized in that: The clearance ring (4) includes a connecting ring (41) and a mortise block (42), wherein the mortise block (42) is provided with four evenly fixedly connected to the inner layer of the connecting ring (41).

4. The roller backlash elimination device for the roller bearing of the blow molding machine's traveling clamp according to claim 1, characterized in that: The inner ring (6) of the roller bearing replaces the connecting sleeve (61) and the mortise groove (62), and the mortise groove (62) is provided with four evenly spaced on the upper end of the connecting sleeve (61).

5. The roller backlash elimination device for the roller bearing of the blow molding machine's traveling clamp according to claim 3, characterized in that: The four mortise blocks (42) are mortised into the four mortise grooves (62).

Images