Bidirectional positioning shaft sleeve mounting structure

Abstract

The utility model relates to a bidirectional positioning shaft sleeve mounting structure, and relates to the field of magnetic drive pump shafts, the bidirectional positioning shaft sleeve mounting structure mainly comprises a pump shaft, a first shaft sleeve and a second shaft sleeve, the pump shaft comprises a limiting convex ring, an insertion groove is formed in the limiting convex ring, and a pin key is mounted in the insertion groove through welding; connecting parts are formed at the two ends, extending out of the slot, of the pin key; the first shaft sleeve and the second shaft sleeve are both coaxially installed on the pump shaft, the first shaft sleeve and the second shaft sleeve are located on the two sides of the limiting convex ring, and the two ends, close to the limiting convex ring, of the first shaft sleeve and the two ends, close to the limiting convex ring, of the second shaft sleeve are each provided with a first assembling groove matched with the two connecting parts; and the two connecting parts are respectively embedded and fixed in the two first assembling grooves. The stability of connection between the pump shaft and the shaft sleeve can be improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of a magnetic pump shaft, in particular to a bidirectional positioning shaft sleeve mounting structure. BACKGROUND

[0002] A magnetic drive pump (referred to as a magnetic pump) is a product applying the working principle of permanent magnet coupling to a centrifugal pump. The magnetic pump is widely used in pickling and paint spraying processes in automobile manufacturing, electrolyte delivery in non-ferrous metal smelting, chlorine water wastewater treatment and acid adding processes in ion membrane caustic soda projects, and the like, due to the characteristics of full sealing, no leakage, corrosion resistance and the like.

[0003] In the prior art, in order to prevent the shaft sleeve from rotating radially in cooperation with the magnetic pump shaft, a radial slot hole is formed in the pump shaft to embed a pin key, and the pin key is fixedly connected to the pump shaft by spot welding. The pin key cooperates with an anti-rotation slot formed on the side of the shaft sleeve to prevent the shaft sleeve from rotating relative to the pump shaft.

[0004] However, in the pump shaft mounting mode of the prior art, the cooperation surface between the pump shaft and the shaft sleeve is too small, and the stability of the connection between the pump shaft and the shaft sleeve is low, and there is room for improvement. CONTENT OF THE INVENTION

[0005] In order to improve the stability of the connection between the pump shaft and the shaft sleeve, the application provides a bidirectional positioning shaft sleeve mounting structure.

[0006] The bidirectional positioning shaft sleeve mounting structure provided by the application adopts the following technical scheme:

[0007] A bidirectional positioning shaft sleeve mounting structure mainly comprises a pump shaft, a first shaft sleeve and a second shaft sleeve. The pump shaft comprises a limiting convex ring, an insertion slot is formed in the limiting convex ring, a pin key is mounted in the insertion slot by welding, and connecting portions are formed at both ends of the pin key extending out of the insertion slot.

[0008] The first shaft sleeve and the second shaft sleeve are coaxially mounted on the pump shaft, and the first shaft sleeve and the second shaft sleeve are located on both sides of the limiting convex ring. First assembly slots adapted to the two connecting portions are formed in both ends of the first shaft sleeve and the second shaft sleeve close to the limiting convex ring, and the two connecting portions are respectively embedded and fixed in the two first assembly slots.

[0009] By adopting the technical scheme, in the process of assembling the pump shaft, the operator can pre-mount the first shaft sleeve and the second shaft sleeve on the pump shaft on both sides of the limiting protruding ring, and the pump shaft and the shaft sleeve can be connected by welding and fixing the pin key with the limiting protruding ring, the first shaft sleeve and the second shaft sleeve; by matching and using the pin key and the slot formed in the limiting protruding ring, the two sides of the pin key can abut against the inner wall of the slot in the limiting protruding ring, the fitting surface between the first shaft sleeve, the second shaft sleeve and the pump shaft can be increased, the situation that the pump shaft and the first shaft sleeve or the second shaft sleeve are cut off due to the cutting of the pin key can be reduced, and the stability of the pump shaft can be improved.

[0010] Preferably, the end portions of the two connecting portions are provided in a rounded shape.

[0011] By adopting the technical scheme, the end portions of the pin key extending out of both ends of the slot are provided in a rounded shape, and the convenience of the operator in assembling the pin key can be improved.

[0012] Preferably, two elastic shaft sleeves are sleeved on the pump shaft, and the two elastic shaft sleeves are located on both sides of the limiting protruding ring, and the first shaft sleeve and the second shaft sleeve are coaxially sleeved on the outer sides of the two elastic shaft sleeves.

[0013] One end of each of the two elastic shaft sleeves close to the limiting protruding ring is provided with a second assembly slot matched with the pin key.

[0014] By adopting the technical scheme, the two elastic shaft sleeves are arranged between the pump shaft and the first shaft sleeve and the second shaft sleeve, the tightness of the connection between the first shaft sleeve, the second shaft sleeve and the pump shaft can be improved, and the stability of the installation of the first shaft sleeve and the second shaft sleeve can be improved.

[0015] Preferably, a positioning structure is arranged between the pin key and the pump shaft.

[0016] By adopting the technical scheme, the stability of the connection between the pin key and the pump shaft can be further improved by the arrangement of the positioning structure.

[0017] Preferably, the positioning structure comprises an insertion block fixedly installed at the bottom of the two connecting portions.

[0018] Two positioning holes are formed in the pump shaft, and the two positioning holes are located on both sides of the limiting protruding ring, and the two insertion blocks are respectively inserted into the two positioning holes.

[0019] By adopting the technical scheme, the insertion of the insertion block at the bottom of the connecting portion into the two positioning holes in the pump shaft can further improve the fitting surface between the pin key and the pump shaft, and the stability of the installation of the pin key can be further improved, and the situation that the pin key is cut off due to excessive torque can be reduced.

[0020] To sum up, the bidirectional positioning shaft sleeve mounting structure has at least one of the following beneficial technical effects:

[0021] 1. During the assembly of the pump shaft, the operator can pre-mount the first shaft sleeve and the second shaft sleeve on the pump shaft on both sides of the limiting protruding ring, and the connection between the pump shaft and the shaft sleeve can be achieved by welding and fixing the pin key with the limiting protruding ring, the first shaft sleeve and the second shaft sleeve. By matching and using the pin key with the insertion slot on the limiting protruding ring, the two sides of the pin key can be in abutment with the inner wall of the insertion slot on the limiting protruding ring, which can increase the fitting surface between the first shaft sleeve, the second shaft sleeve and the pump shaft, reduce the situation that the pump shaft and the first shaft sleeve or the second shaft sleeve are cut off due to the cutting off of the pin key, and improve the stability of the first shaft sleeve, the second shaft sleeve and the pump shaft.

[0022] 2. By setting the end portions of the pin key extending out of both ends of the insertion slot as a rounded shape, the convenience of the operator in assembling the pin key can be improved.

[0023] 3. The two elastic shaft sleeves are arranged between the pump shaft and the first shaft sleeve and the second shaft sleeve, which can improve the tightness of the connection between the first shaft sleeve, the second shaft sleeve and the pump shaft, and improve the stability of the installation of the first shaft sleeve and the second shaft sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of the overall structure of the pin key, the limiting protruding ring, the first shaft sleeve and the second shaft sleeve.

[0025] Figure 2 is a schematic view of the positional relationship between the insertion block and the positioning hole.

[0026] Marked: 1, pump shaft; 11, positioning hole; 2, first shaft sleeve; 21, first assembly groove; 3, second shaft sleeve; 4, limiting protruding ring; 41, insertion slot; 5, pin key; 51, insertion block; 6, elastic shaft sleeve; 61, second assembly groove. DETAILED DESCRIPTION

[0027] The following will be described in detail in combination with the accompanying Figures 1-2 The application will be further described in detail.

[0028] Embodiment 1

[0029] The embodiment of the application discloses a bidirectional positioning shaft sleeve mounting structure. Referring to Figure 1 which mainly comprises a pump shaft 1, a first shaft sleeve 2 and a second shaft sleeve 3, the pump shaft 1 comprises a limiting protruding ring 4, the limiting protruding ring 4 is provided with an insertion slot 41, the insertion slot 41 is provided with a pin key 5 through welding, and the both ends of the pin key 5 extending out of the insertion slot 41 are formed with a connecting part.

[0030] The first shaft sleeve 2 and the second shaft sleeve 3 are coaxially arranged on the pump shaft 1, and the first shaft sleeve 2 and the second shaft sleeve 3 are located on both sides of the limiting convex ring 4. The two ends of the first shaft sleeve 2 and the second shaft sleeve 3 close to the limiting convex ring 4 are provided with first assembly grooves 21 matched with the two connecting parts. The two connecting parts are respectively embedded in the two first assembly grooves 21, and the pin key 5 is fixed with the limiting convex ring 4, the first shaft sleeve 2 and the second shaft sleeve by welding.

[0031] During the assembly of the pump shaft 1, the operator can pre-assemble the first shaft sleeve 2 and the second shaft sleeve 3 on both sides of the limiting convex ring 4 on the pump shaft 1. By welding the pin key 5 with the limiting convex ring 4, the first shaft sleeve 2 and the second shaft sleeve 3, the connection between the pump shaft 1 and the shaft sleeve can be realized. By matching and using the pin key 5 and the insertion slot 41 provided on the limiting convex ring 4, the two sides of the pin key 5 abut against the inner wall of the insertion slot 41 of the limiting convex ring 4, which can increase the fitting surface between the first shaft sleeve 2, the second shaft sleeve 3 and the pump shaft 1, reduce the situation that the pump shaft 1 and the first shaft sleeve 2 or the second shaft sleeve 3 are cut off due to the cutting of the pin key 5, and improve the stability of the first shaft sleeve 2, the second shaft sleeve 3 and the pump shaft 1.

[0032] Referring to Figure 1 , the end of the two connecting parts is provided in a rounded shape. By setting the end of the pin key 5 extending out of the insertion slot 41 in a rounded shape, the convenience of the operator assembling the pin key 5 can be improved.

[0033] Referring to Figure 1 , the pump shaft 1 is provided with two elastic shaft sleeves 6, and the two elastic shaft sleeves 6 are located on both sides of the limiting convex ring 4. The first shaft sleeve 2 and the second shaft sleeve 3 are coaxially arranged on the outer sides of the two elastic shaft sleeves 6. The end of the two elastic shaft sleeves 6 close to the limiting convex ring 4 is provided with a second assembly groove 61 matched with the pin key 5.

[0034] The two elastic shaft sleeves 6 are arranged between the pump shaft 1 and the first shaft sleeve 2 and the second shaft sleeve 3, which can improve the tightness of the connection between the first shaft sleeve 2, the second shaft sleeve 3 and the pump shaft 1, and improve the stability of the installation of the first shaft sleeve 2 and the second shaft sleeve 3.

[0035] The implementation principle of the bidirectional positioning shaft sleeve mounting structure is as follows: during assembly of the pump shaft 1, an operator can previously sleeve the first shaft sleeve 2 and the second shaft sleeve 3 on the pump shaft 1 on the two sides of the limiting protruding ring 4, and the pump shaft 1 and the shaft sleeve can be connected by welding and fixing the column pin key 5 with the limiting protruding ring 4, the first shaft sleeve 2 and the second shaft sleeve 3; the column pin key 5 and the slot 41 provided on the limiting protruding ring 4 are matched and used with each other, the two sides of the column pin key 5 abut against the inner walls of the slots 41 on the limiting protruding ring 4, the fitting surface between the first shaft sleeve 2, the second shaft sleeve 3 and the pump shaft 1 can be increased, the situation that the pump shaft 1 and the first shaft sleeve 2 or the second shaft sleeve 3 are cut off due to cutting off of the column pin key 5 can be reduced, and the stability of the first shaft sleeve 2, the second shaft sleeve 3 and the pump shaft 1 can be improved.

[0036] Embodiment 2

[0037] In this embodiment, the positioning structure is arranged between the column pin key 5 and the pump shaft 1. The positioning structure can further improve the stability of the connection between the column pin key 5 and the pump shaft 1.

[0038] With reference to Figure 2 , the positioning structure comprises an insertion block 51 fixedly installed at the bottom of the two connecting portions; the pump shaft 1 is provided with two positioning holes 11, and the two positioning holes 11 are located on the two sides of the limiting protruding ring 4; and the two insertion blocks 51 are respectively inserted into the two positioning holes 11.

[0039] The insertion block 51 at the bottom of the connecting portion is inserted into the two positioning holes 11 on the pump shaft 1, which can further increase the fitting surface between the column pin key 5 and the pump shaft 1, further improve the stability of the installation of the column pin key 5, and reduce the situation that the column pin key 5 is cut off due to excessive torque.

[0040] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A bidirectional positioning boss mounting structure characterized by, The utility model provides a pump shaft structure, including pump shaft (1), first shaft sleeve (2) and second shaft sleeve (3), the pump shaft (1) includes limiting convex ring (4), the slot (41) is seted up in limiting convex ring (4), the column pin key (5) is installed in the slot (41) through welding, and the both ends of column pin key (5) that projects the slot (41) is formed with the connecting portion; First shaft sleeve (2), second shaft sleeve (3) are coaxially installed on pump shaft (1), and first shaft sleeve (2) and second shaft sleeve (3) are located on both sides of limiting convex ring (4), and the both ends of first shaft sleeve (2), second shaft sleeve (3) close to limiting convex ring (4) are all seted up with the first assembly groove (21) that is adapted with two connecting portions, and two connecting portions are respectively embedded and fixed in two first assembly grooves (21).

2. The bidirectional positioning shaft sleeve mounting structure according to claim 1, characterized in that, The end of two connecting portions is all set up with rounded corner shape.

3. The bidirectional positioning shaft sleeve mounting structure according to claim 2, characterized in that, Pump shaft (1) is sleeved with two elastic shaft sleeves (6), and two elastic shaft sleeves (6) are located on both sides of limiting convex ring (4), and first shaft sleeve (2), second shaft sleeve (3) are respectively coaxially sleeved on the outside of two elastic shaft sleeves (6). The one end of two elastic shaft sleeves (6) close to limiting convex ring (4) is all seted up with the second assembly groove (61) that is adapted with column pin key (5).

4. The bidirectional positioning shaft sleeve mounting structure according to claim 1, characterized in that, The positioning structure is arranged between the column pin key (5) and the pump shaft (1).

5. The bidirectional positioning shaft sleeve mounting structure according to claim 4, characterized in that, The positioning structure includes the plug-in block (51) fixedly installed at the bottom of two connecting portions. The pump shaft (1) is provided with two positioning holes (11), and the two positioning holes (11) are located on both sides of the limiting convex ring (4). Two plug-in blocks (51) are respectively inserted into the two positioning holes (11).

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