Mouth matching mechanism of metal vacuum cup mouth welding device

Abstract

The utility model provides a mouth matching mechanism of a metal vacuum cup mouth welding device, and belongs to the technical field of vacuum cup production equipment. The opening matching mechanism solves the problems that the opening matching pressure of an opening matching mechanism of an existing vacuum cup welding device cannot be adjusted, and the adaptability to vacuum cups of different specifications is poor. The opening matching mechanism of the metal vacuum cup opening welding device comprises a top pressing piece and a lifting seat which is located below the top pressing piece and can ascend and descend vertically, and the lifting seat is provided with a positioning piece capable of moving vertically relative to the lifting seat and a hydraulic cylinder used for supporting the positioning piece. A back pressure valve used for controlling the pressure in the hydraulic cylinder is arranged on an oil way of the hydraulic cylinder. The back pressure valve is simple in structure and ingenious in design, the hydraulic cylinder is adopted to replace a spring to support and buffer the positioning piece, the opening matching pressure of the vacuum cup can be adjusted by adjusting the preset pressure of the back pressure valve, operation is easy and convenient, the opening matching pressure requirements of vacuum cups of different specifications can be met, and adaptability is higher.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermos cup production equipment, and relates to a fitting mechanism for a metal thermos cup mouth welding device. Background Technology

[0002] A thermos flask is a common insulated container used in daily life. It mainly consists of an inner liner and an outer body. The inner liner and outer body are insulated by a vacuum to slow down the heat dissipation from the inner liner. The inner liner and outer body are usually made of stainless steel or other metal materials, welded together and formed by water expansion. After the inner liner and outer body are formed, the inner liner is first inserted into the outer body, aligning the openings of the inner liner and outer body and forming a tight fit through pressure, which is the fitting process. Then, the openings of the cup are welded together to make the inner liner and outer body a single unit, ensuring a seal between them.

[0003] For example, Chinese Patent Application No. 202123424602.4 discloses an arc-shaped cup rim welding machine, which includes a welding laser gun for welding the rim of the outer cup body and the inner cup liner. The welding machine also includes a positioning component for positioning the outer cup body, a pressing component for pressing the rim of the inner cup liner and a shaping component for shaping the outer cup body, both positioned above the positioning component. The shaping component is sleeved outside the pressing component. The positioning component is controlled by a first lifting mechanism, and the shaping component is controlled by a second lifting mechanism. The positioning component is coupled with a rotating mechanism that drives it to rotate. When the first lifting mechanism drives the pressing component to press against the rim of the inner cup liner, the second lifting mechanism has at least a driving distance, allowing the shaping component to be sleeved on the outer cup body and the rim of the cup to be exposed. In this design, the positioning component is driven to rise by the first lifting mechanism and cooperates with the pressing component above to vertically compress the inner cup liner and the outer cup body for rim fitting. Because the height of the inner liner and outer body of a thermos flask may have some errors during manufacturing, a buffer structure is needed to compensate for this error to prevent deformation due to excessive or insufficient compression of the positioning component, which could lead to a misfit between the inner liner and outer body. This solution uses a spring as a buffer. However, since the spring's elasticity and stroke are relatively fixed, they cannot be adjusted according to the actual situation of different thermos flask sizes. Furthermore, the spring may experience metal fatigue over long-term use, leading to a decrease in elasticity, which affects the fitting accuracy between the inner liner and outer body, thus impacting the yield rate. Summary of the Invention

[0004] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a fitting mechanism for a metal thermos cup mouth welding device. The technical problem to be solved by this utility model is: how to improve the adaptability of the fitting mechanism of the thermos cup mouth welding device to thermos cups of different specifications.

[0005] The purpose of this utility model can be achieved through the following technical solution: a fitting mechanism for a metal thermos cup mouth welding device, comprising a top pressing component and a lifting seat located below the top pressing component and capable of vertical movement, characterized in that the lifting seat is provided with a positioning component that can move vertically relative to the lifting seat and a hydraulic cylinder for supporting the positioning component, and a back pressure valve for controlling the pressure inside the hydraulic cylinder is provided on the oil circuit of the hydraulic cylinder.

[0006] In this invention, during the spout fitting process, the insulated cup, after initial fitting of the inner liner and outer body, is placed on the positioning component. Then, the cup is lifted upwards by the lifting seat, causing the cup opening to align with the upper pressure component, thus completing the spout fitting between the inner liner and outer body. Once the cup is against the upper pressure component, the positioning component and the lifting seat are connected by a hydraulic cylinder. Under the action of the back pressure valve, when the hydraulic cylinder reaches the pressure set by the valve, the hydraulic oil in the cylinder is depressurized through the back pressure valve, causing the piston rod of the hydraulic cylinder to retract and form a buffer. This ensures that the inner liner and outer body are fitted under constant pressure, resulting in more stable spout fitting quality and a higher yield rate. Furthermore, this invention allows for adjustment of the spout fitting pressure by adjusting the set pressure of the back pressure valve, making operation simple and convenient, and easily adaptable to various sizes of insulated cups.

[0007] In the fitting mechanism of the aforementioned metal thermos cup rim welding device, a pressure reducing valve is also provided in the oil circuit of the hydraulic cylinder. The pressure reducing valve further ensures the stability of the oil pressure inside the hydraulic cylinder.

[0008] In the fitting mechanism of the metal thermos cup mouth welding device described above, a connecting seat is fixedly connected to the piston rod of the hydraulic cylinder, a connecting rod is rotatably connected to the connecting seat, and the connecting rod is fixedly connected to the positioning component.

[0009] In the aforementioned fitting mechanism of the metal thermos cup spout welding device, a limiting sleeve is fixedly connected to the lifting seat. The limiting sleeve and the lifting seat together form a sliding cavity. The connecting seat is slidably disposed within the sliding cavity, and when the connecting seat slides up and down along the sliding cavity, it abuts against the upper and lower walls of the sliding cavity. The limiting sleeve improves the moving accuracy and range of the connecting seat, thereby improving the fitting accuracy between the positioning component and the pressing component, and ensuring the yield rate of thermos cup fittings.

[0010] In the spouting mechanism of the aforementioned metal thermos cup spout welding device, the top pressing member is disc-shaped, and a centering member is provided on the top pressing member for extending into the mouth of the inner cup and providing support for the mouth of the inner cup. The centering member can extend into the inner cup during the spouting process and provide support for the mouth of the inner cup, preventing the mouth of the inner cup from deforming due to excessive force, and further improving the spouting yield.

[0011] In the aforementioned welding device for the mouth of a metal thermos, the shape of the positioning member is adapted to the cross-sectional shape of the inner cavity at the bottom of the outer cup body and is used to partially embed into the bottom of the outer cup body. Furthermore, the upper end face of the positioning member has a positioning groove that matches the shape of the bottom of the inner cup liner. Thus, the inner cup liner of the thermos is positioned by engaging with the positioning groove, while the partial embedding of the positioning member into the bottom of the outer cup body provides a certain degree of positioning for the outer cup body, thereby ensuring the fitting accuracy between the outer cup body and the inner cup liner and further improving the stability of the fitting.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. This utility model uses a hydraulic cylinder between the lifting seat and the positioning component for buffering, ensuring that the inner cup liner and the outer cup body are fitted under constant pressure, thereby ensuring the good quality of the thermos cup fitting. Moreover, by adjusting the set pressure of the back pressure valve connected to the hydraulic cylinder, the fitting pressure between the inner cup liner and the outer cup body can be adjusted. The operation is simple and convenient, and it can meet the fitting pressure requirements of thermos cups of different specifications, making it more adaptable.

[0014] 2. This utility model has a centering component on the top pressing component, which can not only ensure the positional accuracy of the mouth of the inner liner, but also prevent the mouth from being deformed due to excessive pressure. The positioning component can simultaneously limit the inner cup and the outer cup body. Through the upper and lower cooperation of the top pressing component and the positioning component, the fitting accuracy between the inner liner and the outer cup body can be ensured, thereby further improving the yield of the fitting product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the inner liner and the outer cup body when they are fitted together;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the fitting of this utility model;

[0018] Figure 4 This is a schematic diagram of the hydraulic circuit structure of a hydraulic cylinder.

[0019] In the diagram, 1 is the lifting seat; 2 is the positioning component; 2a is the positioning groove; 31 is the hydraulic cylinder; 32 is the solenoid control valve; 33 is the back pressure valve; 34 is the pressure reducing valve; 41 is the top pressure component; 42 is the centering component; 51 is the connecting seat; 52 is the limit sleeve; 53 is the connecting rod; 54 is the bearing; 6 is the thermos cup; 61 is the outer cup body; 62 is the inner cup liner. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] Example 1

[0022] A fitting mechanism for a metal thermos cup mouth welding device, such as Figure 1 , Figure 2 As shown, it includes a top pressing component 41 and a lifting seat 1 located below the top pressing component 41. The lifting seat 1 is provided with a positioning component 2. The lifting seat 1 is connected to the lifting mechanism, so that the lifting seat 1 and the positioning component 2 can move up and down relative to the top pressing component 41. When fitting the cup, the thermos cup 6, after the inner cup liner 62 and the outer cup body 61 are pre-fitted, is placed on the positioning component 2, and then the lifting seat 1 is driven to rise, so that the positioning component 2 cooperates with the top pressing component 41 above to squeeze the thermos cup 6, so that the mouth of the inner cup liner 62 and the mouth of the outer cup body 61 form a tight fit, so as to facilitate subsequent welding.

[0023] Specifically, such as Figures 2-4 As shown, in this embodiment, the lifting seat 1 is disc-shaped, and a connecting seat 51 that can move up and down is provided on the lifting seat 1. The connecting seat 51 is connected to the positioning member 2 through a connecting rod 53, and a vertically arranged hydraulic cylinder 31 is fixedly provided on the lower end face of the lifting seat 1. The piston rod of the connecting seat 51 is fixedly connected to the connecting seat 51, so that the hydraulic cylinder 31 provides support for the connecting seat 51 and the positioning member 2. Figure 4 As shown, the hydraulic cylinder 31 is equipped with an electromagnetic control valve 32, a back pressure valve 33, and a pressure reducing valve 34 on its oil circuit. The electromagnetic control valve 32 can control the working state of the hydraulic cylinder 31, allowing it to switch between lifting, lowering, and pressure holding states. The pressure reducing valve 34 is used to control the oil pressure when the oil pump delivers hydraulic oil to the hydraulic cylinder 31. The back pressure valve 33 can release pressure when the piston rod is compressed, causing the pressure inside the hydraulic cylinder 31 to increase, thus ensuring that the hydraulic cylinder 31 maintains a stable pressure. This allows the hydraulic cylinder 31 to provide support and cushioning for the positioning component 2 during assembly.

[0024] The working principle of this utility model is as follows: First, the hydraulic cylinder 31 is adjusted to the pressure-holding state. Then, the thermos 6, after the inner cup liner 62 and the outer cup body 61 are pre-fitted, is placed on the positioning member 2. Then, the lifting seat 1 rises and the cup mouth at the upper end of the thermos 6 abuts against the top pressure member 41. At this time, due to the piston rod being pressed, the oil pressure in the hydraulic cylinder 31 rises and the back pressure valve 33 opens to release oil, and the hydraulic cylinder 31 retracts to ensure that the pressure between the positioning member 2 and the thermos 6 is at the preset value. Then, the lifting seat 1 continues to rise until the inner cup liner 62 and the outer cup body 61 are fitted together under the constant pressure between the positioning member 2 and the top pressure member 41.

[0025] In this embodiment, the preset pressure of the back pressure valve 33 can be adjusted as needed to adapt to the pressure requirements of the insulated cup 6 of different specifications.

[0026] Furthermore, such as Figure 2 , Figure 3 As shown in this embodiment, the lifting seat 1 has a central hole in the middle, and a vertically arranged limiting sleeve 52 is fixed on the upper end surface of the lifting seat 1. The limiting sleeve 52 is coaxially arranged with the central hole, and the limiting sleeve 52 and the lifting seat 1 enclose a sliding cavity. The connecting seat 51 is slidably arranged in the sliding cavity, and after the connecting seat 51 moves up and down a certain distance relative to the sliding cavity, it abuts against the upper and lower parts of the sliding cavity. This not only improves the moving accuracy of the connecting seat 51 when it moves up and down, but also limits the movement of the connecting seat 51.

[0027] Furthermore, such as Figure 3 As shown, in this embodiment, the connecting seat 51 has a mounting hole, and a bearing 54 is fixed in the mounting hole. The connecting rod 53 is rotatably connected to the connecting seat 51 through the bearing 54, so that the positioning member 2 can rotate relative to the lifting seat 11.

[0028] Furthermore, such as Figure 2 , Figure 3 As shown, the top pressing member 41 is also disc-shaped, and a central hole is also opened on the top pressing member 41. A centering member 42 is inserted into the central hole. The lower end of the centering member 42 is located below the top pressing member 41, and the cross-section of the lower end of the centering member 42 is adapted to the shape of the inner cup liner 62, so that the lower end of the centering member 42 can extend into the mouth of the inner cup liner 62 during fitting and provide support for the mouth of the inner cup liner 62, preventing it from being deformed by pressure. In this embodiment, the positioning member 2 is also disc-shaped, and its cross-section is slightly smaller than the cross-section of the bottom of the inner cavity of the outer cup body 61. A positioning groove 2a with a shape adapted to the bottom shape of the inner cup liner 62 is opened on the upper end surface of the positioning member 2. Thus, this utility model is suitable for fitting the thermos cup 6 whose bottom of the outer shell is not welded. After the inner cup 62 is inserted into the outer shell from the bottom to form a pre-fit, the inner cup 62 is placed in the positioning groove 2a and the positioning member 2 is partially embedded in the bottom of the outer shell to position both the outer shell and the inner cup 62. Then, the top pressing member 41 presses against the opening of the outer shell to complete the fitting.

[0029] Example 2

[0030] This embodiment is basically the same as the technical solution of Embodiment 1. The difference is that this embodiment is applicable to a thermos cup 6 in which the bottom of the outer shell is sealed first, and then the inner cup liner 62 is inserted from the opening of the outer shell. That is, the shape of the positioning groove 2a opened on the positioning member 2 is adapted to the bottom of the outer cup body 61, and the pressing member 41 forms a pressing force on the opening of the inner cup liner 62 from above the thermos cup 6 to complete the fitting.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0032] Although this document frequently uses terms such as lifting seat 1, positioning component 2, hydraulic cylinder 31, electromagnetic control valve 32, back pressure valve 33, pressure reducing valve 34, top pressure component 41, and centering component 42, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A mouth fitting mechanism of a metal vacuum cup mouth welding device, comprising a top pressing piece (41) and a lifting seat (1) which is located below the top pressing piece (41) and can be lifted up and down, characterized in that, The lifting seat (1) is provided with a positioning member (2) capable of moving up and down relative to the lifting seat (1) and a hydraulic cylinder (31) for supporting the positioning member (2), and a back pressure valve (33) for controlling the pressure in the hydraulic cylinder (31) is arranged on the oil path of the hydraulic cylinder (31).

2. The cup mouth welding device of claim 1, wherein, A pressure reducing valve (34) is further arranged on the oil path of the hydraulic cylinder (31).

3. The cup mouth welding device of the metal vacuum cup (6) according to claim 1, characterized in that, A connecting seat (51) is fixedly connected to the piston rod of the hydraulic cylinder (31), a connecting rod (53) is rotatably connected to the connecting seat (51), and the connecting rod (53) is fixedly connected to the positioning member (2).

4. The fitting mechanism of the metal thermos cup mouth welding device according to claim 3, characterized in that, A limiting sleeve (52) is fixedly connected to the lifting seat (1), a sliding cavity is formed between the limiting sleeve (52) and the lifting seat (1), the connecting seat (51) is slidably arranged in the sliding cavity, and the connecting seat (51) can abut against the upper and lower walls of the sliding cavity when sliding up and down along the sliding cavity.

5. The fitting mechanism of the metal thermos cup mouth welding device according to claim 4, characterized in that, The pressing member (41) is in the shape of a disc, and a centering member (42) for extending into the mouth of the inner cup (62) and supporting the mouth of the inner cup (62) is arranged on the pressing member (41).

6. The fitting mechanism of the metal thermos cup mouth welding device according to claim 5, characterized in that, The shape of the positioning member (2) is matched with the cross-sectional shape of the inner cavity of the bottom of the outer cup body (61) and is used for partially embedding the bottom of the outer cup body (61), and a positioning groove (2a) matched with the shape of the bottom of the inner cup (62) is opened on the upper end surface of the positioning member (2).

Images