Anti-loose gear structure of gear pump and gear pump

Abstract

The utility model discloses a gear pump anti-loose gear structure which comprises a shell, a driving gear and a driven gear are rotatably arranged in the shell and meshed with each other, a pump shaft is spirally connected in the driving gear, a stabilizing ring is fixedly sleeved outside the pump shaft, a plurality of retaining plates are arrayed on the outer side of the pump shaft, and the retaining plates are arranged on the outer side of the pump shaft. The stabilizing ring is locked with the driving gear through a plurality of screws, locking sleeves are connected to nuts of the screws in a clamped mode, the locking sleeves correspond to the stopping plates in a one-to-one mode, and one sides of the stopping plates are attached to one sides of the locking sleeves. According to the utility model, one blocking plate is arranged on one side of each locking sleeve, the blocking plates abut against the locking sleeves, and the blocking plates and the locking sleeves mutually limit movement of each other, so that the connection stability of the driving gear and the pump shaft is enhanced, and potential safety hazards caused by looseness of the pump shaft and the driving gear are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to an anti-loosening gear structure of a gear pump and a gear pump. Background Art

[0002] Gear pumps rely on the change in working space volume generated by the mutual meshing of two or more gears sealed in the pump body to transport liquid media. The pump shaft and gear of the gear pump are connected by threads for power transmission. Specifically, an axial internal threaded hole is set on the gear, and an external thread is set on the pump shaft. The pump shaft is screwed into the internal threaded hole of the gear to complete the assembly of the two.

[0003] Gear pumps are bidirectionally rotating, they can run clockwise or counterclockwise, depending on the direction of rotation, the inlet and outlet ports will change. For applications that require fixed inlet and outlet ports, a reverse function will be required. When the gear pump is in normal operation, the pump shaft and the gears always maintain a stable power transmission, but when the pump shaft of the gear pump reverses, it will cause the threaded connection between the pump shaft and the gear to loosen, and even the gear may fall off the pump shaft, thus affecting the normal operation of the gear pump and posing a potential safety hazard. Utility Model Content

[0004] The utility model aims to provide a gear pump anti-loosening gear structure and a gear pump to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gear pump anti-loosening gear structure, comprising: a shell, a driving gear and a driven gear are rotatably arranged in the shell, the driving gear and the driven gear are meshed with each other, a pump shaft is spirally connected in the driving gear, a stabilizing ring is fixedly sleeved on the outside of the pump shaft, and a plurality of baffles are arrayed on the outside of the pump shaft, the stabilizing ring is locked with the driving gear by a plurality of screws, a locking sleeve is clamped on the nut of the screw, the locking sleeve corresponds to the baffle plate one by one, and one side of the baffle plate is in contact with one side of the locking sleeve.

[0006] Furthermore, a stop block is provided on the side of the locking sleeve, and one side of the stop block is in contact with one side of the stop plate.

[0007] Furthermore, a first sliding groove is provided in the locking sleeve, a plurality of sliding blocks are fixedly connected in the first sliding groove, and a plurality of second sliding grooves are provided on the nut of the screw, and the second sliding grooves are matched with the sliding blocks one by one.

[0008] Furthermore, a plurality of clamping strips are fixedly connected to one side of the locking sleeve where the first sliding groove is provided, and a wedge block is fixedly connected to the end of the clamping strip.

[0009] Furthermore, the driven gear and the pump shaft are both connected to the housing via bearings.

[0010] In the above technical scheme, the utility model provides a gear pump anti-loosening gear structure and a gear pump having the beneficial effects:

[0011] The utility model strengthens the connection strength between the driving gear and the pump shaft by multiple screws, thereby enhancing the stability of the driving gear when rotating; by arranging a stop plate on one side of each locking sleeve, the stop plate abuts against the locking sleeve, and the stop plate and the locking sleeve restrict each other's movement; when the gear pump is reversed, the spiral connection between the pump shaft and the driving gear will be slightly loose, and the locking sleeve will prevent the stop plate from rotating, thereby enhancing the stability of the connection between the driving gear and the pump shaft; the stop plate will abut against the locking sleeve, thereby preventing the locking sleeve from rotating, thereby achieving that the screw is always in a locked state, further enhancing the connection stability between the driving gear and the pump shaft, and eliminating the potential safety hazards caused by the loosening of the pump shaft and the driving gear.

[0012] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0013] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 A front cross-sectional view provided for an embodiment of the utility model;

[0016] Figure 2 A side sectional view provided for an embodiment of the utility model;

[0017] Figure 3 A schematic diagram of the structure of a tightening sleeve provided in an embodiment of the utility model;

[0018] Figure 4 A schematic diagram of a screw structure provided in an embodiment of the utility model;

[0019] Figure 5 The embodiment of the utility model provides Figure 2 Enlarged view of point A.

[0020] Description of reference numerals:

[0021] 1. Shell; 11. Water chamber; 12. Liquid inlet channel; 13. Liquid outlet channel; 2. Driving gear; 3. Driven gear; 4. Stabilizing ring; 5. Pump shaft; 51. Stop plate; 6. Locking sleeve; 61. First slide groove; 611. Sliding block; 62. Snap-on strip; 621. Wedge block; 63. Stop block; 7. Screw; 71. Second slide groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0023] Please refer to 1-5, a gear pump anti-loosening gear structure and a gear pump, including: a shell 1, a driving gear 2 and a driven gear 3 are rotatably arranged in the shell 1, the driving gear 2 and the driven gear 3 are meshed with each other, a pump shaft 5 is spirally connected in the driving gear 2, a stabilizing ring 4 is fixedly sleeved on the outside of the pump shaft 5, and a plurality of retaining plates 51 are arrayed on the outside of the pump shaft 5, the stabilizing ring 4 is locked with the driving gear 2 by a plurality of screws 7, a locking sleeve 6 is clamped on the nut of the screw 7, the locking sleeve 6 corresponds to the retaining plate 51 one by one, and one side of the retaining plate 51 is in contact with one side of the locking sleeve 6.

[0024] Specifically, a water passage chamber 11, a liquid inlet channel 12, and a liquid outlet channel 13 are provided in the housing 1. The water passage chamber 11 connects the liquid inlet channel 12 and the liquid outlet channel 13. The driving gear 2 and the driven gear 3 are installed in the water passage chamber 11. The baffle plate 51 is welded to the outside of the pump shaft 5. The screw 7 is spirally connected to the driving gear 2 and the stabilizing ring 4. Figure 1When the pump shaft 5 is turned clockwise, the locking of the pump shaft 5 and the driving gear 2 becomes tighter and tighter. When the driving source drives the pump shaft 5 to rotate clockwise, the pump shaft 5 will drive the driving gear 2 to rotate clockwise, thereby driving the driven gear 3 to rotate counterclockwise, and the liquid is sucked from the liquid inlet channel 12 to the liquid outlet channel 13. The utility model strengthens the connection strength between the driving gear 2 and the pump shaft 5 by multiple screws 7, and enhances the stability of the driving gear 2 when rotating. By arranging a stop plate 51 on one side of each locking sleeve 6, the stop plate 51 abuts on the locking sleeve 6 The retaining plate 51 and the locking sleeve 6 restrict each other's movement. When the gear pump reverses, the spiral connection between the pump shaft 5 and the driving gear 2 will be slightly loosened, and the locking sleeve 6 will prevent the retaining plate 51 from rotating, thereby enhancing the stability of the connection between the driving gear 2 and the pump shaft 5, and the retaining plate 51 will be pressed against the locking sleeve 6, thereby preventing the locking sleeve 6 from rotating, so that the screw 7 is always in a locked state, further enhancing the connection stability between the driving gear 2 and the pump shaft 5, and eliminating the potential safety hazards caused by the loosening of the pump shaft 5 and the driving gear 2.

[0025] Furthermore, a stop block 63 is disposed on the side of the locking sleeve 6 , and one side of the stop block 63 is in contact with one side of the stop plate 51 .

[0026] Specifically, the spiral connection locking direction of the locking sleeve 6, the driving gear 2 and the stabilizing ring 4 is clockwise. When the gear pump rotates in the opposite direction, a force will be generated between the baffle plate 51 and the locking sleeve 6. The force of the baffle plate 51 on the locking sleeve 6 enhances the locking degree of the screw 7 on the driving gear 2 and the stabilizing ring 4. The force of the locking sleeve 6 on the baffle plate 51 limits the rotation of the pump shaft 5 relative to the driving gear 2, thereby avoiding large vibration inside the gear pump when the gear pump is reversed.

[0027] Furthermore, a first slide groove 61 is provided in the locking sleeve 6, and a plurality of sliders 611 are fixedly connected in the first slide groove 61. A plurality of second slide grooves 71 are provided on the nut of the screw 7, and the second slide grooves 71 are matched one by one with the sliders 611. A plurality of snap-in strips 62 are fixedly connected to one side of the first slide groove 61 on the locking sleeve 6, and a wedge block 621 is fixedly connected to the end of the snap-in strip 62.

[0028] Specifically, refer to Figures 1 to 5During installation, first screw the pump shaft 5 into the driving gear 2 so that the stabilizing ring 4 contacts one side of the driving gear 2, and lock the driving gear 2 and the stabilizing ring 4 together through the screw 7, then install the locking sleeve 6 on the nut of the screw 7, that is, press the four clamping strips 62 against the nut of the screw 7, and then press the locking sleeve 6 hard. Under the action of force, the clamping strip 62 is deformed, and the outer edge of the nut of the screw 7 slides into the first slide groove 61 along the inclined surface of the wedge block 621. When the slider 611 is fully inserted into the second slide groove 71, the lower end surface of the wedge block 621 is tightly attached to the lower end surface of the nut of the screw 7, locking the locking sleeve 6 on the nut of the screw 7. At this time, one side of the stop block 63 is tightly attached to one side of the stop plate 51, and the stop block 63 is located on the side that prevents the stop plate 51 from rotating counterclockwise.

[0029] Furthermore, the driven gear 3 and the pump shaft 5 are both connected to the housing 1 via bearings.

[0030] Specifically, two bearings are provided on both sides of the driven gear 3, the outer rings of the two bearings are embedded in the housing 1, and the inner rings of the bearings are fixedly sleeved on the driven gear 3. Two bearings are also provided on both sides of the pump shaft 5, and the connection method is the same as the installation method of the driven gear 3. At the same time, a sealing ring is provided between the bearing on the driving source side and the stabilizing ring 4. The installation method of the bearing, the driven gear 3 and the pump shaft 5 is common knowledge well known to the staff in this field and will not be explained in detail here.

[0031] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A gear pump anti-loosening gear structure, comprising: A housing (1), characterized in that: a driving gear (2) and a driven gear (3) are rotatably arranged inside the housing (1), the driving gear (2) and the driven gear (3) are meshed with each other, a pump shaft (5) is spirally connected inside the driving gear (2), a stabilizing ring (4) is fixedly sleeved outside the pump shaft (5), and a plurality of retaining plates (51) are arranged in an array outside the pump shaft (5), the stabilizing ring (4) is locked with the driving gear (2) by a plurality of screws (7), a locking sleeve (6) is clamped on the nut of the screw (7), the locking sleeve (6) corresponds to the retaining plate (51) one by one, and one side of the retaining plate (51) is in contact with one side of the locking sleeve (6), and one side of the retaining plate (51) is in contact with one side of the locking sleeve (6).

2. The anti-loosening gear structure of a gear pump according to claim 1, characterized in that: A stop block (63) is provided on the side of the locking sleeve (6), and one side of the stop block (63) is in contact with one side of the stop plate (51).

3. The gear pump anti-loosening gear structure according to claim 1, characterized in that: The locking sleeve (6) is provided with a first sliding groove (61), and a plurality of sliding blocks (611) are fixedly connected to the first sliding groove (61). The nut of the screw (7) is provided with a plurality of second sliding grooves (71), and the second sliding grooves (71) are matched one by one with the sliding blocks (611).

4. The gear pump anti-loosening gear structure according to claim 3, characterized in that: A plurality of clamping strips (62) are fixedly connected to one side of the locking sleeve (6) on which the first sliding groove (61) is opened, and a wedge block (621) is fixedly connected to the end of the clamping strip (62).

5. The gear pump anti-loosening gear structure according to claim 1, characterized in that: The driven gear (3) and the pump shaft (5) are both connected to the housing (1) via bearings.

6. A gear pump, characterized in that: The gear pump anti-loosening gear structure described in any one of claims 1 to 4 is installed in the housing (1).

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