Peristaltic pump

Abstract

The utility model provides a peristaltic pump which comprises a driving device, a transmission device and a pump head. The driving device comprises a first drive and a second drive; the transmission device comprises a first transmission shaft and a second transmission shaft arranged outside the first transmission shaft in a sleeving mode. A first roller group, a second roller group and a third transmission shaft are arranged in the pump head; the first roller group is connected with a first drive through a third transmission shaft and a first transmission shaft, and the second roller group is connected with a second drive through a second transmission shaft; a first bearing and a second bearing are further arranged in the pump head, the first bearing is located between the pump head and the first roller set, and the second bearing is located between the pump head and the second roller set. The pump head can be conveniently disassembled and assembled, and the problems that the roller set shakes and the transmission shaft is prone to fatigue due to stress are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of peristaltic pumps, in particular to a peristaltic pump. Background Art

[0002] In order to optimize the space problem of the filling machine, an assembled stacked peristaltic pump was developed to reduce the cost of the entire linkage line and improve product competitiveness. The main problems of the assembled stacked peristaltic pumps on the market are that they are too large and bulky, inconvenient to install, have high transportation costs, and low filling accuracy.

[0003] The utility model with the publication number CN219492544U discloses a superimposed peristaltic pump, including a pump housing, a first pump head and a second pump head are arranged in the pump housing, the pump housing is arranged on a mounting seat, the mounting seat is connected to a supporting mechanism, the supporting mechanism is used to make a spacing between the pump housing and the table, the first pump head is connected to a first driving member through a first transmission shaft, the second pump head is connected to a second driving member through a second transmission shaft, the first transmission shaft is sleeved in the second transmission shaft, the second transmission shaft is sleeved in the supporting mechanism, and the first driving member and the second driving member are arranged below the supporting mechanism. However, after the first transmission shaft passes through the first pump head, it cooperates with the bearing, so that there is a gap between the first transmission shaft and the roller assembly, which causes the first pump head to shake, and the first transmission shaft is easy to fatigue when subjected to force, and the first transmission shaft extends into the pump housing and is connected to the bearing, which is not convenient for disassembly and assembly of the pump head. Utility Model Content

[0004] The utility model aims to solve the defects in the prior art and provide a peristaltic pump, which is convenient for disassembly and assembly of the pump head and reduces the shaking of the roller group and the fatigue problem of the transmission shaft under stress.

[0005] To achieve the above-mentioned purpose, the utility model provides a peristaltic pump, including a driving device, a transmission device and a pump head;

[0006] The driving device includes a first drive and a second drive; the transmission device includes a first transmission shaft and a second transmission shaft sleeved outside the first transmission shaft; a first roller group, a second roller group and a third transmission shaft are arranged in the pump head; the first roller group is connected to the first drive through the third transmission shaft and the first transmission shaft, and the second roller group is connected to the second drive through the second transmission shaft;

[0007] A first bearing and a second bearing are also provided in the pump head. The first bearing is located between the pump head and the first roller group, and the second bearing is located between the pump head and the second roller group.

[0008] Both ends of the first roller group are provided with a first bearing, and both ends of the second roller group are provided with a second bearing. The first bearing and the second bearing are respectively used to ensure the coaxial stability of the transmission of the first roller group. The second roller group is fixed with the second transmission shaft in a floating manner, and the second transmission shaft rotates to transmit the servo power of the first drive to control the rotation of the second roller group. The first roller group is connected to the third transmission shaft, and the third transmission shaft is fixed with the first transmission shaft in a floating manner, and the first transmission shaft transmits the servo power of the second drive.

[0009] When the peristaltic pump is started, the first drive is started, driving the first transmission shaft to rotate, driving the third transmission shaft to rotate, driving the first roller group to rotate. The second drive is started, driving the first transmission shaft, driving the second roller group to rotate.

[0010] The utility model arranges the first transmission shaft and the third transmission shaft between the first drive and the first roller group. When the pump head and the transmission device are installed or disassembled, only the third transmission shaft needs to be connected or separated from the first transmission shaft, so as to facilitate the installation of the pump head. The first bearing is located between the pump head and the first roller group. The first roller group and the first bearing are directly positioned by interference fit, which can avoid the transmission shaft passing through the first roller group and fitting with the first bearing, so that there is a gap between the transmission shaft and the first roller group, resulting in the shaking of the first roller group and the fatigue problem of the transmission shaft under stress.

[0011] Optionally, a first elastic member is provided between the first bearing and the first roller group.

[0012] The first roller assembly is fixed to the first bearing, and flexible compression is achieved between the two through the first elastic member to prevent the first roller assembly from moving up and down and causing friction to the pump pipe.

[0013] Optionally, a second elastic member is provided between the second bearing and the second roller set.

[0014] A second elastic member is installed between the second roller group and the second bearing, and flexible compression is achieved between the two through the second elastic member to avoid friction on the pump pipe caused by the up and down movement of the second roller group.

[0015] Optionally, the second drive is connected to the second transmission shaft via a gear assembly.

[0016] Optionally, the gear assembly includes a main gear and a sub-gear, and the second drive is connected to the second transmission shaft via the main gear and the sub-gear in sequence.

[0017] Optionally, the second transmission shaft is connected to the second roller assembly via a transmission block.

[0018] The second roller assembly is fixed to the transmission block at the bottom, and is fixed to the second transmission shaft in a floating manner through the transmission block, so as to transmit the servo power control of the second drive, and the second roller assembly rotates.

[0019] Optionally, the transmission device further includes a transmission seat, and the first transmission shaft and the second transmission shaft are both disposed in the transmission seat.

[0020] Beneficial effects:

[0021] In the utility model, both ends of the first roller group are provided with a first bearing, and both ends of the second roller group are provided with a second bearing, and the first bearing and the second bearing are respectively used to ensure the coaxial stability of the transmission of the first roller group. The second roller group is floatingly fixed with the second transmission shaft, and the second transmission shaft rotates to transmit the servo power of the first drive to control the rotation of the second roller group. The first roller group is connected to the third transmission shaft, and the third transmission shaft is floatingly fixed with the first transmission shaft, and the first transmission shaft transmits the servo power of the second drive.

[0022] When the peristaltic pump is started, the first drive is started, driving the first transmission shaft to rotate, driving the third transmission shaft to rotate, driving the first roller group to rotate. The second drive is started, driving the first transmission shaft, driving the second roller group to rotate.

[0023] The utility model sets the first transmission shaft and the third transmission shaft between the first drive and the first roller group. When the pump head and the transmission device are installed or disassembled, only the third transmission shaft needs to be connected or separated from the first transmission shaft, which is convenient for installing the pump head. The pump body is designed with high installation precision and high filling precision. The first bearing is located between the pump head and the first roller group. The first roller group and the first bearing are directly positioned by interference fit, which can avoid the transmission shaft passing through the first roller group and fitting with the first bearing, so that there is a gap between the transmission shaft and the first roller group, resulting in the shaking of the first roller group and the problem of easy fatigue of the transmission shaft under force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 It is a cross-sectional view of a peristaltic pump disclosed in the utility model;

[0026] Figure 2 It is a cross-sectional view of a pump head in a peristaltic pump disclosed in the utility model;

[0027] Figure 3 This is a stereoscopic diagram of a peristaltic pump disclosed in the utility model.

[0028] Reference numerals:

[0029]

[0030]

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model based on the specific content of the technical solution.

[0034] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] See also Figure 1-3 , a peristaltic pump according to an embodiment of the utility model comprises a driving device 1, a transmission device 2 and a pump head 3;

[0036] The driving device 1 includes a first driving device 11 and a second driving device 12, the transmission device 2 includes a first transmission shaft 22 and a second transmission shaft 23 sleeved outside the first transmission shaft 22, and a first roller group 31, a second roller group 34 and a third transmission shaft 37 are arranged in the pump head 3; the first roller group 31 is connected to the first driving device 11 through the third transmission shaft 37 and the first transmission shaft 22, and the second roller group 34 is connected to the second driving device 12 through the second transmission shaft 23;

[0037] A first bearing 32 and a second bearing 35 are further disposed in the pump head 3 . The first bearing 32 is located between the pump head 3 and the first roller set 31 , and the second bearing 35 is located between the pump head 3 and the second roller set 34 .

[0038] Specifically, the driving device 1 includes a first driving device 11 and a second driving device 12 installed below the mounting seat 16 . The mounting seat 16 is disposed below the table 17 . The driving device 1 is used to provide driving force for the pump head 3 .

[0039] The transmission device 2 is fixed on the top of the table 17 by a transmission seat 21, and the top of the transmission seat 21 is connected to the pump head 3. The transmission seat 21 is provided with a first transmission shaft 22 and a second transmission shaft 23. The second transmission shaft 23 is connected to the second drive 12 to transmit the rotational power transmitted by the second drive 12. The first transmission shaft 22 is connected to the first drive 11 through the lower coupling 13 to transmit the rotational power of the first drive 11.

[0040] The pump head 3 is connected to the top of the transmission seat 21 through the base 39. First bearings 32 are provided at both ends of the first roller group 31, and second bearings 35 are provided at both ends of the second roller group 34. The first bearing 32 and the second bearing 35 are respectively used to ensure the coaxial stability of the transmission of the first roller group 31.

[0041] The second roller group 34 is fixed and floated with the second transmission shaft 23, and the second transmission shaft 23 rotates to transmit the servo power of the first drive 11, and controls the rotation of the second roller group 34. The first roller group 31 is connected to the third transmission shaft 37, and the third transmission shaft 37 is fixed and floated with the first transmission shaft 22, and the first transmission shaft 22 transmits the servo power of the second drive 12. When the peristaltic pump is started, the first drive 11 is started, driving the first transmission shaft 22 to rotate, driving the third transmission shaft 37 to rotate, and driving the first roller group 31 to rotate. The second drive 12 is started, driving the first transmission shaft 22, and driving the second roller group 34 to rotate.

[0042] The utility model arranges the first transmission shaft 22 and the third transmission shaft 37 between the first drive 11 and the first roller group 31. When the pump head 3 and the transmission device 2 are installed or disassembled, only the third transmission shaft 37 needs to be connected or separated from the first transmission shaft 22, so as to facilitate the installation of the pump head 3. The first bearing 32 is located between the pump head 3 and the first roller group 31. The first roller group 31 and the first bearing 32 are directly positioned by interference fit, which can avoid the transmission shaft passing through the first roller group 31 and fitting with the first bearing 32, so that there is a gap between the transmission shaft and the first roller group 31, resulting in the shaking of the first roller group 31 and the problem of fatigue of the transmission shaft under stress.

[0043] See also Figure 2 In some embodiments of the present invention, a first elastic member 33 is provided between the first bearing 32 and the first roller assembly 31 .

[0044] In this embodiment, the first roller set 31 is fixed to the first bearing 32 , and flexible compression is achieved between the two through the first elastic member 33 to prevent the first roller set 31 from moving up and down and causing friction to the pump tube 4 .

[0045] See also Figure 2 In some embodiments of the present invention, a second elastic member 36 is provided between the second bearing 35 and the second roller set 34 .

[0046] In this embodiment, a second elastic member 36 is installed between the second roller group 34 and the second bearing 35 , and flexible compression is achieved between the two through the second elastic member 36 to prevent the second roller group 34 from moving up and down and causing friction to the pump tube 4 .

[0047] See also Figure 1 In some embodiments of the present invention, the second drive 12 is connected to the second transmission shaft 23 through a gear assembly.

[0048] The first drive 11 drives the first transmission shaft 22 to rotate through the coupling 13, and the second drive 12 drives the second transmission shaft 23 to rotate through the gear assembly.

[0049] See also Figure 1 In some embodiments of the present invention, the gear assembly includes a main gear 14 and a sub-gear 15 , and the second drive 12 is connected to the second transmission shaft 23 via the main gear 14 and the sub-gear 15 in sequence.

[0050] See also Figure 2 In some embodiments of the present invention, the second transmission shaft 23 is connected to the second roller set 34 through a transmission block 38.

[0051] The second roller set 34 is fixed to the transmission block 38 at the bottom, and is fixed to the second transmission shaft 23 by the transmission block 38 , so as to transmit the servo power control of the second drive 12 , and the second roller set 34 rotates.

[0052] See also Figure 1 In some embodiments of the present invention, the transmission device 2 further includes a transmission seat 21 , and the first transmission shaft 22 and the second transmission shaft 23 are both disposed in the transmission seat 21 .

[0053] Second transmission bearings 25 are respectively sleeved on both ends of the second transmission shaft 23 . The second transmission bearings 25 are located between the transmission seat 21 and the second transmission shaft 23 to limit the position of the second transmission shaft 23 and reduce the friction between the transmission seat 21 and the second transmission shaft 23 .

[0054] First transmission bearings 24 are respectively sleeved on both ends of the first transmission shaft 22 . The first transmission bearings 24 are located between the first transmission shaft 22 and the second transmission shaft 23 to limit the position of the first transmission shaft 22 and reduce the friction between the first transmission shaft 22 and the second transmission shaft 23 .

[0055] See also Figure 1-3In some embodiments of the utility model, the pump head 3 also includes a base 39, two side plates 310, a support seat 311, a top cover 312 and two pump covers 313, and the two side plates 310 are respectively located between the support seat 311 and the base 39, and between the support seat 311 and the top cover 312.

[0056] The first roller group 31 is located in a space surrounded by the top cover 312, the upper side plate 310 and the support seat 311. The first bearings 32 arranged at both ends of the first roller group 31 are respectively located between the first roller group 31 and the top cover 312 and between the first roller group 31 and the support seat 311.

[0057] The second roller group 34 is located in a space surrounded by the support seat 311, the lower side plate 310 and the base 39. The second bearings 35 arranged at both ends of the second roller group 34 are respectively located between the second roller group 34 and the base 39 and between the second roller group 34 and the support seat 311.

[0058] The two pump covers 313 are also respectively located between the support seat 311 and the base 39, and between the support seat 311 and the top cover 312. The two pump covers 313 respectively form a fixed gap with the first roller group 31 and the second roller group 34 to ensure that the pump tube 4 rolls on the first roller group 31 or the second roller group 34 to ensure high-precision delivery of the medicine in the pump tube 4.

[0059] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A peristaltic pump, characterized in that: It comprises a driving device (1), a transmission device (2) and a pump head (3); The driving device (1) comprises a first driving device (11) and a second driving device (12); the transmission device (2) comprises a first transmission shaft (22) and a second transmission shaft (23) sleeved outside the first transmission shaft (22); a first roller group (31), a second roller group (34) and a third transmission shaft (37) are arranged in the pump head (3); The first roller set (31) is connected to the first drive (11) via a third transmission shaft (37) and a first transmission shaft (22), and the second roller set (34) is connected to the second drive (12) via a second transmission shaft (23); The pump head (3) is further provided with a first bearing (32) and a second bearing (35), wherein the first bearing (32) is located between the pump head (3) and the first roller group (31), and the second bearing (35) is located between the pump head (3) and the second roller group (34).

2. The peristaltic pump according to claim 1, characterized in that: A first elastic member (33) is provided between the first bearing (32) and the first roller assembly (31).

3. The peristaltic pump according to claim 1, characterized in that: A second elastic member (36) is provided between the second bearing (35) and the second roller assembly (34).

4. The peristaltic pump according to claim 1, characterized in that: The second drive (12) is connected to the second transmission shaft (23) via a gear assembly.

5. The peristaltic pump according to claim 4, characterized in that: The gear assembly comprises a main gear (14) and a sub-gear (15), and the second drive (12) is connected to the second transmission shaft (23) via the main gear (14) and the sub-gear (15) in sequence.

6. The peristaltic pump according to claim 1, characterized in that: The second transmission shaft (23) is connected to the second roller set (34) via a transmission block (38).

7. The peristaltic pump according to claim 1, characterized in that: The transmission device (2) further comprises a transmission seat (21), and the first transmission shaft (22) and the second transmission shaft (23) are both arranged in the transmission seat (21).

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