Connecting structure of plunger rod and lifting shaft of gluing pump

Abstract

The utility model belongs to the technical field of gluing pumps, in particular to a connecting structure of a plunger rod and a lifting shaft of a gluing pump, which comprises the plunger rod and the lifting shaft, a threaded hole and a first mounting hole are arranged at the lower end of the plunger rod, the threaded hole is axially arranged, the first mounting hole is radially arranged, and a threaded section and a second mounting hole are arranged at the upper end of the lifting shaft. The threaded section is matched with the threaded hole, the second installation hole is arranged in the radial direction, the threaded section is connected into the threaded hole in a threaded mode but not screwed tightly, pins are arranged in the first installation hole and the second installation hole in a penetrating mode, and the material lifting shaft can shake relative to the plunger rod. According to the utility model, the deflection of the material lifting shaft caused by machining errors and installation can be effectively compensated, so that the single-side abrasion is effectively prevented, and the leakage is effectively prevented.

Description

Technical field:

[0001] The utility model belongs to the technical field of glue pumps, in particular to a connection structure between a plunger rod of a glue pump and a material lifting shaft. Background technology:

[0002] The glue pump drives the lifting shaft up and down through the plunger rod to absorb and discharge the glue.

[0003] Existing glue pumps, such as Figure 1 As shown, it includes a plunger seat 1, a plunger 2 and a pressure plate joint 3 which are connected in sequence from top to bottom, a plunger rod 4 is slidably arranged inside the plunger seat 1, the lower end of the plunger rod 4 extends out of the plunger seat 1 to connect with a lifting shaft 5, the plunger rod 4 is connected to the lifting shaft 5 by a threaded connection, a cut-off valve 6 and a movable valve 7 are sleeved on the outside of the lifting shaft 5, a cut-off valve sealing ring 8 sleeved on the outside of the cut-off valve 6 is provided between the cut-off valve 6 and the plunger 2, and a lifting seal 9 sleeved on the outside of the lifting shaft 5 is provided between the lifting shaft 5 and the movable valve 7.

[0004] The shortcomings of the above-mentioned glue pump are: the lifting shaft is connected to the plunger rod through a thread, and processing errors and improper installation can easily cause the lifting shaft to deviate relative to the plunger rod. During the up and down movement of the lifting shaft, the cutting valve sealing ring and the lifting seal are prone to unilateral wear, which in turn leads to leakage. Summary of the invention:

[0005] The utility model aims to provide a connection structure between a plunger rod of a glue pump and a material lifting shaft, which can effectively compensate for the deflection of the material lifting shaft caused by processing errors and installation, thereby effectively preventing unilateral wear and further effectively preventing leakage.

[0006] The utility model is achieved in this way:

[0007] A connection structure between a plunger rod of a glue pump and a material lifting shaft comprises a plunger rod and a material lifting shaft, wherein a threaded hole and a first mounting hole are provided at the lower end of the plunger rod, the threaded hole is arranged axially, and the first mounting hole is arranged radially, a threaded section and a second mounting hole are provided at the upper end of the material lifting shaft, the threaded section is adapted to the threaded hole, and the second mounting hole is arranged radially, the threaded section is screwed into the threaded hole but not tightened, pins are passed through the first mounting hole and the second mounting hole, and the material lifting shaft can swing relative to the plunger rod.

[0008] In the above-mentioned connection structure between the plunger rod of a glue pump and the lifting shaft, the mounting hole one is tightly matched with the pin, and the diameter of the mounting hole two is larger than the outer diameter of the pin; or the mounting hole two is tightly matched with the pin, and the diameter of the mounting hole one is larger than the outer diameter of the pin.

[0009] In the above-mentioned connection structure between the plunger rod of a glue pump and the lifting shaft, the lower end of the plunger rod is also provided with an assembly hole located below the threaded hole, the assembly hole and the threaded hole are coaxially arranged, the diameter of the assembly hole is larger than the major diameter of the threaded hole, and a cylindrical section is provided on the lifting shaft at a position corresponding to the assembly hole, and the diameter of the cylindrical section is smaller than the diameter of the assembly hole.

[0010] In the above-mentioned connection structure between the plunger rod of a glue pump and the material lifting shaft, the first mounting hole is arranged on the portion of the plunger rod having the assembly hole, and the second mounting hole is arranged on the cylindrical section.

[0011] In the above-mentioned connection structure between the plunger rod of a glue pump and the material lifting shaft, the first mounting hole is a through hole penetrating the plunger rod, and the second mounting hole is a through hole penetrating the material lifting shaft.

[0012] In the above-mentioned connection structure between the plunger rod of a glue pump and the lifting shaft, the mounting hole one and the mounting hole two are circular holes, the pin is an elastic cylindrical pin, the elastic cylindrical pin is a hollow structure, and an opening is provided on the side wall.

[0013] The outstanding advantages of the utility model compared with the prior art are:

[0014] 1. The threaded section of the utility model is screwed into the threaded hole but not tightened, and the lifting shaft can shake relative to the plunger rod, effectively compensating for the deflection of the lifting shaft caused by processing errors and installation, thereby effectively preventing unilateral wear and further effectively preventing leakage; at the same time, the connection strength between the plunger rod and the lifting shaft is ensured by the pin;

[0015] 2. The second mounting hole of the utility model is tightly matched with the pin, and the diameter of the first mounting hole is larger than the outer diameter of the pin, which effectively prevents the pin from falling and ensures that the lifting shaft can shake relative to the plunger rod;

[0016] 3. The lower end of the plunger rod of the utility model is also provided with an assembly hole located below the threaded hole. The assembly hole is coaxially arranged with the threaded hole. The diameter of the assembly hole is larger than the major diameter of the threaded hole. A cylindrical section corresponding to the assembly hole is provided on the lifting shaft. The diameter of the cylindrical section is smaller than the diameter of the assembly hole, which effectively prevents the lifting shaft from excessive shaking. Description of the drawings:

[0017] Figure 1 is a cross-sectional view of the prior art;

[0018] Figure 2 It is a three-dimensional diagram of the utility model;

[0019] Figure 3 It is a cross-sectional view of the utility model;

[0020] Figure 4 It is an exploded view of the utility model;

[0021] Figure 5 It is a cross-sectional view of the plunger rod of the utility model.

[0022] Reference numerals:

[0023] Figure 1 In the middle: 1. Plunger seat; 2. Plunger; 3. Pressure plate joint; 4. Plunger rod; 5. Lifting shaft; 6. Cut-off valve; 7. Movable valve; 8. Cut-off valve sealing ring; 9. Lifting seal.

[0024] Figure 2-5 Middle: 11, plunger rod; 12, lifting shaft; 13, threaded hole; 14, mounting hole 1; 15, threaded section; 16, mounting hole 2; 17, pin; 18, assembly hole; 19, cylindrical section. Specific implementation method:

[0025] The present invention is further described below with reference to specific embodiments. Figure 2 —5:

[0026] A connection structure between a plunger rod of a glue pump and a material lifting shaft comprises a plunger rod 11 and a material lifting shaft 12, wherein a threaded hole 13 and a mounting hole 14 are provided at the lower end of the plunger rod 11, the threaded hole 13 is arranged axially, and the mounting hole 14 is arranged radially, a threaded section 15 and a mounting hole 2 16 are provided at the upper end of the material lifting shaft 12, the threaded section 15 is matched with the threaded hole 13, and the mounting hole 2 16 is arranged radially, the threaded section 15 is screwed into the threaded hole 13 but not tightened, pins 17 are passed through the mounting hole 14 and the mounting hole 2 16, and the material lifting shaft 12 can swing relative to the plunger rod 11.

[0027] like Figure 2-5 As shown, the threaded section 15 arranged on the lifting shaft 12 of the utility model is screwed into the threaded hole 13 arranged on the plunger rod 11 but not tightened. The lifting shaft 12 can swing relative to the plunger rod 11, effectively compensating for the deflection of the lifting shaft caused by processing errors and installation, thereby effectively preventing unilateral wear and further effectively preventing leakage; at the same time, the connection strength between the plunger rod 11 and the lifting shaft 12 is guaranteed by the pin 17.

[0028] The utility model has a simple structure and is convenient to assemble and disassemble.

[0029] In order to prevent the pin 17 from falling and ensure that the lifting shaft 12 can shake relative to the plunger rod 11, the mounting hole 14 is tightly matched with the pin 17, and the diameter of the mounting hole 2 16 is larger than the outer diameter of the pin 17; or the mounting hole 2 16 is tightly matched with the pin 17, and the diameter of the mounting hole 14 is larger than the outer diameter of the pin 17. In this embodiment, the mounting hole 2 16 is tightly matched with the pin 17, and the diameter of the mounting hole 14 is larger than the outer diameter of the pin 17, which is convenient for installing the pin 17.

[0030] In order to prevent the lifting shaft 12 from shaking excessively, Figure 3-5 As shown, the lower end of the plunger rod 11 is also provided with an assembly hole 18 located below the threaded hole 13, the assembly hole 18 is coaxially arranged with the threaded hole 13, the diameter of the assembly hole 18 is larger than the major diameter of the threaded hole 13, and a cylindrical section 19 corresponding to the assembly hole 18 is provided on the lifting shaft 12, and the diameter of the cylindrical section 19 is smaller than the diameter of the assembly hole 18. In this embodiment, the diameter of the cylindrical section 19 is equal to the major diameter of the threaded section 15.

[0031] In order to ensure that the lifting shaft 12 and the plunger rod 11 have a higher connection strength, the first mounting hole 14 is arranged on the portion of the plunger rod 11 having the assembly hole 18 , and the second mounting hole 16 is arranged on the cylindrical section 19 .

[0032] In order to facilitate installation and clearly know whether it is installed in place, Figure 3-5 As shown, the mounting hole 14 is a through hole penetrating the plunger rod 11 , and the mounting hole 2 16 is a through hole penetrating the material lifting shaft 12 .

[0033] The installation structure of the pin 17: the pin 17 passes through the installation hole 14, the installation hole 2 16 and the installation hole 14 in sequence.

[0034] Furthermore, the mounting hole 14 and the mounting hole 2 16 are circular holes, the pin 17 is an elastic cylindrical pin, the elastic cylindrical pin is a hollow structure, and an opening is provided on the side wall to facilitate the assembly of the pin 17 and to fit tightly with the mounting hole 2 16 .

[0035] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A connection structure between a plunger rod of a glue pump and a material lifting shaft, comprising a plunger rod (11) and a material lifting shaft (12), characterized in that: The lower end of the plunger rod (11) is provided with a threaded hole (13) and a first mounting hole (14), the threaded hole (13) is arranged along the axial direction, and the first mounting hole (14) is arranged along the radial direction. The upper end of the material lifting shaft (12) is provided with a threaded section (15) and a second mounting hole (16), the threaded section (15) is adapted to the threaded hole (13), and the second mounting hole (16) is arranged along the radial direction. The threaded section (15) is screwed into the threaded hole (13) but not tightened. Pins (17) are inserted into the first mounting hole (14) and the second mounting hole (16), and the material lifting shaft (12) can shake relative to the plunger rod (11).

2. The connection structure between the plunger rod of a glue pump and the material lifting shaft according to claim 1, characterized in that: The first mounting hole (14) is tightly matched with the pin (17), and the diameter of the second mounting hole (16) is larger than the outer diameter of the pin (17); or the second mounting hole (16) is tightly matched with the pin (17), and the diameter of the first mounting hole (14) is larger than the outer diameter of the pin (17).

3. The connection structure between the plunger rod of a glue pump and the material lifting shaft according to claim 1, characterized in that: The lower end of the plunger rod (11) is also provided with an assembly hole (18) located below the threaded hole (13); the assembly hole (18) is coaxially arranged with the threaded hole (13); the diameter of the assembly hole (18) is larger than the major diameter of the threaded hole (13); a cylindrical section (19) is provided on the lifting shaft (12) at a position corresponding to the assembly hole (18); the diameter of the cylindrical section (19) is smaller than the diameter of the assembly hole (18).

4. The connection structure between the plunger rod of a glue pump and the material lifting shaft according to claim 3, characterized in that: The first mounting hole (14) is arranged on the portion of the plunger rod (11) having the assembly hole (18), and the second mounting hole (16) is arranged on the cylindrical section (19).

5. The connection structure between the plunger rod of a glue pump and the material lifting shaft according to claim 1, characterized in that: The first mounting hole (14) is a through hole penetrating the plunger rod (11), and the second mounting hole (16) is a through hole penetrating the material lifting shaft (12).

6. The connection structure between the plunger rod of a glue pump and the material lifting shaft according to claim 1, characterized in that: The first mounting hole (14) and the second mounting hole (16) are circular holes, and the pin (17) is an elastic cylindrical pin. The elastic cylindrical pin is a hollow structure, and an opening is provided on the side wall.

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