Special machining lathe for pump shell of metering pump

Abstract

The special machining lathe comprises a lathe body and a chuck, the chuck is rotationally connected to an inner cavity of the lathe body, the special machining lathe further comprises a clamping mechanism, the clamping mechanism comprises a placing base, an abutting block, a matching block and a first driving assembly, the placing base is arranged on the chuck, and the abutting block and the matching block are slidably connected to the placing base; the matching block can be matched with hole sites in the metering pump shell, the first driving assembly is used for driving the abutting block and the matching block to move, and when the first driving assembly drives the abutting block and the matching block to move towards one side of the metering pump shell on the placing base, the abutting block abuts against the outer surface of the metering pump shell; the matching blocks are respectively matched with corresponding hole sites on the pump shell of the metering pump; the pump shell of the metering pump is positioned and limited on the mounting seat, so that the possibility of deviation of the placement position of the pump shell of the metering pump is reduced, and the possibility of deviation of the position degree of an eccentric hole is reduced; and the possibility that the metering pump shell falls out in the machining process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of metering pump processing, and in particular to a special lathe for processing metering pump casings. Background Technology

[0002] A metering pump, also known as a fixed displacement pump or proportional pump, is a special type of positive displacement pump designed to meet stringent process requirements. Its working principle involves a motor driving a worm gear and worm wheel reducer to rotate the main shaft and eccentric wheel. The eccentric wheel then drives the bow-shaped connecting rod and sliding adjusting seat in a reciprocating motion. When the plunger moves to the rear dead center, a vacuum is created in the pump chamber, drawing in liquid; when it moves to the front dead center, the suction valve closes and the discharge valve opens to discharge liquid.

[0003] In existing technologies, through holes on the pump housing are often machined using CNC lathes, but the fixtures on CNC lathes are mostly three-jaw chucks; such as Figure 6 The metering pump housing 4 shown is irregularly arranged, such as having a flange protrusion 41, and an eccentric through hole 42 is opened on the metering pump housing. Therefore, it is difficult to position and clamp the irregular metering pump with a three-jaw chuck, which makes it difficult to process the eccentric hole of the metering pump housing. Utility Model Content

[0004] To facilitate the machining of eccentric holes on the pump casing of a metering pump, this application provides a special machining lathe for metering pump casings.

[0005] The technical solution provided in this application for a special lathe for machining metering pump casings is as follows:

[0006] A lathe for machining metering pump housings includes a lathe body and a chuck, the chuck being rotatably connected to the inner cavity of the lathe body. It also includes a clamping mechanism for holding the metering pump housing, the clamping mechanism being mounted on the chuck. The clamping mechanism includes a placement seat, several abutment blocks, several mating blocks, and a first driving assembly. The placement seat is mounted on the chuck, and the several abutment blocks and several mating blocks are slidably connected to the placement seat. The several mating blocks can respectively mate with different holes on the metering pump housing. The first driving assembly drives the movement of the several abutment blocks and several mating blocks. When the first driving assembly drives the several abutment blocks and several mating blocks to move towards the metering pump housing side on the placement seat, the several abutment blocks respectively abut against the outer surface of the metering pump housing, and the several mating blocks respectively mate with corresponding holes on the metering pump housing.

[0007] By adopting the above technical solution, the first driving component simultaneously drives the sliding of several abutment blocks and several mating blocks, so that the mating blocks mate with the corresponding holes on the metering pump housing. Through the mating connection between the mating blocks and the holes on the metering pump housing, the position of the metering pump housing on the mounting base is positioned and limited, reducing the possibility of deviation in the placement of the metering pump housing, thereby reducing the possibility of deviation in the position of the eccentric hole. At the same time, several abutment blocks abut against the surface of the metering pump housing, and through the friction between the several abutment blocks and the metering pump housing, the metering pump housing is further limited, reducing the possibility that the metering pump housing will fall out due to the rotation of the mounting base during processing.

[0008] Preferably, the placement seat has a contour groove that matches the shape of the metering pump housing, and the contour groove has a mating groove that matches the flange protrusion of the metering pump housing. When the metering pump housing is placed in the placement seat, the contour groove fits the outer surface of the metering pump housing, and the mating groove matches the flange protrusion.

[0009] By adopting the above technical solution, after the metering pump casing is placed in the placement block, the friction between the contour groove and the metering pump casing and the fit between the mating groove and the flange protrusion further position and limit the metering pump, reducing the possibility of deviation in the placement of the metering pump casing, thereby reducing the possibility of deviation in the position of the eccentric hole; at the same time, the contour groove plays a foolproof role, reducing the possibility of operators making mistakes in placing the metering pump casing.

[0010] Preferably, it also includes a second driving component, in which two locking blocks are slidably connected within the mating groove, and the two locking blocks are arranged in opposite sliding directions. The second driving component is used to drive the sliding of the two locking blocks simultaneously. When the second driving component drives the two locking blocks to move toward the metering pump housing side on the placement seat, the two locking blocks abut against the flange protrusion respectively, and the two locking blocks abut against each other.

[0011] By adopting the above technical solution, the two locking blocks are driven by the second driving component to slide to opposite sides until they abut against each other and against the flange protrusion, thereby limiting the position of the flange protrusion and reducing the possibility that the flange protrusion may shift during rotation due to its large weight.

[0012] Preferably, the first drive assembly includes a conical gear ring, a plurality of first bevel gears, and a plurality of threaded rods. The conical gear ring is coaxial with the spindle of the lathe body and rotatably connected in a mounting seat. The plurality of first bevel gears are rotatably connected in the mounting seat and mesh with the conical gear ring. The plurality of threaded rods correspond to the plurality of first bevel gears and are coaxially and fixedly connected to the corresponding first bevel gears. The plurality of threaded rods are threaded through and threaded to a plurality of abutment blocks or a plurality of mating blocks.

[0013] By adopting the above technical solution, the conical gear ring is rotated, and through the meshing connection between the conical gear ring and multiple first bevel gears, the first bevel gears and multiple threaded rods rotate together. Through the threaded connection between the threaded rods and the abutment blocks or mating blocks, several abutment blocks or several mating blocks slide along the axial direction of the corresponding threaded rods.

[0014] Preferably, the second drive assembly includes a threaded shaft, which is rotatably connected in the placement seat. The two ends of the threaded shaft in the axial direction are respectively threaded and connected to two locking blocks, and the thread directions of the two ends of the threaded shaft in the axial direction are different.

[0015] By adopting the above technical solution, rotating the threaded rod and through the threaded connection between the threaded shaft and the two locking blocks, the two locking blocks move along the axial direction of the threaded shaft, so that the threads at both ends of the threaded shaft have different directions of rotation, thereby causing the two locking blocks to move in opposite directions and clamping the flange protrusion from both sides.

[0016] Preferably, it further includes a connecting rod, a second bevel gear is coaxially and fixedly connected to the threaded shaft, and a third bevel gear is rotatably connected to the placement seat. The third bevel gear meshes with the second bevel gear. The connecting rod is coaxially and fixedly connected to the third bevel gear, and the end of the connecting rod away from the third bevel gear is coaxially and fixedly connected to any of the first bevel gears.

[0017] By adopting the above technical solution and connecting through a connecting rod, when the first bevel gear rotates, the second bevel gear and the third bevel gear meshing with the second bevel gear rotate together, thereby causing the threaded shaft to rotate together with the rotation of the first bevel gear, so that the abutment block, the mating block and the locking block move together.

[0018] Preferably, the end of any of the threaded rods away from the first bevel gear extends to the outside and is fixedly connected to a force-applying handle.

[0019] By adopting the above technical solution, the threaded rod is rotated by applying force to rotate the first bevel gear. Through the meshing connection between the bevel gear ring and several first bevel gears, the bevel gear rotates and causes several first bevel gears to rotate together.

[0020] The main technical effects of this utility model are reflected in the following aspects:

[0021] 1. This utility model, by setting up a clamping mechanism, simultaneously drives the sliding of several abutment blocks and several mating blocks through a first driving component, so that the mating blocks engage with corresponding holes on the metering pump housing. Through the engagement connection between the mating blocks and the holes on the metering pump housing, the position of the metering pump housing on the mounting base is positioned and limited, reducing the possibility of deviation in the placement of the metering pump housing, thereby reducing the possibility of deviation in the position of the eccentric hole. At the same time, several abutment blocks abut against the surface of the metering pump housing, and through the friction between the several abutment blocks and the metering pump housing, the metering pump housing is further limited, reducing the possibility of the metering pump housing falling out due to the rotation of the mounting base during processing.

[0022] 2. By setting a contour groove, after the metering pump casing is placed in the placement block, the friction between the contour groove and the metering pump casing and the fit between the fitting groove and the flange protrusion further position and limit the metering pump, reducing the possibility of deviation in the placement of the metering pump casing, thereby reducing the possibility of deviation in the position of the eccentric hole; at the same time, the setting of the contour groove plays a foolproof role, reducing the possibility of operator errors in placing the metering pump casing.

[0023] 3. This utility model sets up locking blocks, and drives two locking blocks to slide to opposite sides until they abut against each other and onto the flange protrusion, thereby limiting the position of the flange protrusion and reducing the possibility of the flange protrusion shifting during rotation due to its large weight. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 It is along Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 This is a schematic diagram of the placement base structure according to an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the structure of the first driving component in an embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the locking block structure according to an embodiment of this application.

[0029] Figure 6 This is a schematic diagram of the metering pump casing structure according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Lathe body; 2. Chuck; 3. Clamping mechanism; 31. Placement seat; 311. Copying groove; 312. Mating groove; 32. Abutment block; 33. Mating block; 34. First drive assembly; 341. Bevel gear ring; 342. First bevel gear; 343. Threaded rod; 344. Force application handle; 35. Second drive assembly; 351. Threaded shaft; 352. Connecting rod; 353. Second bevel gear; 354. Third bevel gear; 36. Locking block; 4. Metering pump housing; 41. Flange protrusion; 42. Through hole; 43. Hole position. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0032] This application discloses a special lathe for machining metering pump casings.

[0033] Reference Figure 1 and Figure 3 This embodiment of a lathe for machining metering pump housings includes a lathe body 1 and a chuck 2. The chuck 2 is rotatably connected to the inner cavity of the lathe body 1. It also includes a clamping mechanism 3 for clamping the metering pump housing 4. The clamping mechanism 3 is mounted on the chuck 2 and includes a placement seat 31, two abutment blocks 32, a mating block 33, and a first drive assembly 34. The placement seat 31 is mounted on the chuck 2, and the two abutment blocks 32 and the mating block 33 slide along an axis perpendicular to the placement seat 31. The first drive assembly 34 is used to drive the movement of the two abutment blocks 32 and the mating block 33. When the first drive assembly 34 drives the abutment blocks 32 and the mating block 33 to move toward the metering pump housing 4 on the placement seat 31, the abutment blocks 32 abut against the outer surface of the metering pump housing 4 respectively, and the mating blocks 33 respectively mate with the corresponding holes 43 on the metering pump housing 4.

[0034] Reference Figure 2 and Figure 3The placement base 31 has a contour groove 311 that matches the shape of the metering pump housing 4, and a mating groove 312 that matches the flange protrusion 41 of the metering pump housing 4. When the metering pump housing 4 is placed in the placement base 31, the contour groove 311 fits against the outer surface of the metering pump housing 4, and the mating groove 312 matches the flange protrusion 41. After the metering pump housing 4 is placed in the placement block, the friction between the contour groove 311 and the metering pump housing 4 and the mating groove 312 and the flange protrusion 41 further position and limit the metering pump housing 4, reducing the possibility of deviation in the placement of the metering pump housing 4, thereby reducing the possibility of deviation in the position of the eccentric hole. At the same time, the contour groove 311 plays a role in preventing mistakes, reducing the possibility of operators making errors when placing metering pump housings 4 for different products.

[0035] Reference Figure 3 and Figure 5 It also includes a second drive assembly 35, in which two locking blocks 36 are slidably connected within the mating groove 312, and the sliding directions of the two locking blocks 36 are opposite. The second drive assembly 35 is used to drive the sliding of the two locking blocks 36. When the second drive assembly 35 drives the two locking blocks 36 to move toward the metering pump housing 4 on the placement seat 31, the two locking blocks 36 abut against the flange protrusion 41 respectively, and the two locking blocks 36 abut against each other.

[0036] Reference Figure 4 and Figure 5 The first driving assembly 34 simultaneously drives the sliding of several abutment blocks 32 and several mating blocks 33, causing the mating blocks 33 to engage with corresponding holes 43 on the metering pump housing 4. This engagement of the mating blocks 33 with the holes 43 on the metering pump housing 4 positions and limits the metering pump housing 4 on the mounting base, reducing the possibility of misalignment and thus minimizing the possibility of misalignment of the eccentric holes. Simultaneously, the abutment blocks 32 abut against the surface of the metering pump housing 4, and the friction between the abutment blocks 32 and the metering pump housing further limits the metering pump housing 4, reducing the possibility of the metering pump housing 4 falling out during the rotation of the mounting base 31. The second driving assembly 35 then drives two locking blocks 36 to slide towards opposite sides until they abut against the flange protrusion 41, limiting the position of the flange protrusion 41 and reducing the possibility of one side of the flange protrusion 41 shifting during rotation due to its weight.

[0037] Reference Figure 4The first drive assembly 34 includes a conical gear ring 341, multiple first bevel gears 342, and multiple threaded rods 343. The conical gear ring 341 is coaxial with the spindle of the lathe body 1 and rotatably connected to the placement seat 31. The multiple first bevel gears 342 are rotatably connected to the placement seat 31 and mesh with the conical gear ring 341. The multiple threaded rods 343 correspond to the multiple first bevel gears 342 and are coaxially and fixedly connected to the corresponding first bevel gears 342. The multiple threaded rods 343 are threaded through and threaded to several abutment blocks 32 or several mating blocks 33. The second drive assembly 35 includes a threaded shaft 351, which is rotatably connected to the placement seat 31. The two ends of the threaded shaft 351 in the axial direction are threaded through and threaded to two locking blocks 36, and the two ends of the threaded rods 343 in the axial direction have different thread directions.

[0038] Reference Figure 4 It also includes a connecting rod 352, a second bevel gear 353 coaxially and fixedly connected to the threaded shaft 351, and a third bevel gear 354 rotatably connected to the placement seat 31. The third bevel gear 354 meshes with the second bevel gear 353. The connecting rod 352 is coaxially and fixedly connected to the third bevel gear 354, and one end of the connecting rod 352 away from the third bevel gear 354 is coaxially and fixedly connected to any first bevel gear 342. Furthermore, one end of any threaded rod 343 away from the first bevel gear 342 extends to the outside and is fixedly connected to a force-applying handle 344.

[0039] Reference Figure 2 and Figure 4 By rotating the threaded rod 343 through the force-applying handle 344, the first bevel gear 342 rotates. Through the meshing connection between the bevel gear ring 341 and several first bevel gears 342, the bevel gears rotate, causing several first bevel gears 342 to rotate together; and causing the remaining threaded rods 343 to rotate together. Through the threaded connection between the threaded rods 343 and the abutment blocks 32 or mating blocks 33, several abutment blocks 32 or mating blocks 33 slide along the axial direction of the corresponding threaded rods 343; connected by the connecting rod 352, when the first bevel gear 342 rotates... The second bevel gear 353 and the third bevel gear 354 meshing with the second bevel gear 353 rotate together, so that the threaded shaft 351 rotates together with the first bevel gear 342. Through the threaded connection between the threaded shaft 351 and the two locking blocks 36, the two locking blocks 36 move along the axial direction of the threaded shaft 351, so that the abutment block 32, the mating block 33 and the locking block 36 move together. The threads at both ends of the threaded shaft 351 have different directions of rotation, so that the two locking blocks 36 move in opposite directions, clamping the flange protrusion 41 from both sides.

[0040] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A lathe for machining metering pump casings, comprising a lathe body (1) and a chuck (2), wherein the chuck (2) is rotatably connected to the inner cavity of the lathe body (1), characterized in that: It also includes a clamping mechanism (3) for clamping the metering pump housing (4). The clamping mechanism (3) is disposed on the chuck (2). The clamping mechanism (3) includes a placement seat (31), a plurality of abutment blocks (32), a plurality of mating blocks (33), and a first drive assembly (34). The placement seat (31) is disposed on the chuck (2). The plurality of abutment blocks (32) and the plurality of mating blocks (33) are slidably connected to the placement seat (31), and the plurality of mating blocks (33) can be respectively engaged with the metering pump housing (4). The first driving component (34) is used to drive the movement of several abutment blocks (32) and several mating blocks (33) in conjunction with different holes (43) on the metering pump housing (4) on the placement seat (31). When the first driving component (34) drives several abutment blocks (32) and several mating blocks (33) to move toward the metering pump housing (4) on the placement seat (31), several abutment blocks (32) abut against the outer surface of the metering pump housing (4) respectively, and several mating blocks (33) are respectively matched with the corresponding holes (43) on the metering pump housing (4).

2. The special lathe for machining metering pump casings according to claim 1, characterized in that: The placement seat (31) has a contour groove (311) that can match the shape of the metering pump housing (4), and the contour groove (311) has a mating groove (312) that can match the flange protrusion (41) of the metering pump housing (4). When the metering pump housing (4) is placed in the placement seat (31), the contour groove (311) fits against the outer surface of the metering pump housing (4), and the mating groove (312) matches the flange protrusion (41).

3. The special machining lathe for metering pump casings according to claim 2, characterized in that: It also includes a second drive assembly (35), in which two locking blocks (36) are slidably connected in the mating groove (312), and the two locking blocks (36) are arranged in opposite sliding directions. The second drive assembly (35) is used to drive the two locking blocks (36) to slide. When the second drive assembly (35) drives the two locking blocks (36) to move toward the metering pump housing (4) on the placement seat (31), the two locking blocks (36) respectively abut against the flange protrusion (41), and the two locking blocks (36) abut against each other.

4. A special lathe for machining metering pump casings according to claim 3, characterized in that: The first drive assembly (34) includes a conical gear ring (341), a plurality of first bevel gears (342) and a plurality of threaded rods (343). The conical gear ring (341) is coaxial with the spindle of the lathe body (1) and rotatably connected in the placement seat (31). The plurality of first bevel gears (342) are rotatably connected in the placement seat (31) respectively, and the plurality of first bevel gears (342) are meshed with the conical gear ring (341) respectively. The plurality of threaded rods (343) correspond to the plurality of first bevel gears (342). The plurality of threaded rods (343) are coaxial with and fixedly connected to the corresponding first bevel gears (342). The plurality of threaded rods (343) are respectively threaded through and threaded to a plurality of abutment blocks (32) or a plurality of mating blocks (33).

5. A special lathe for machining metering pump casings according to claim 4, characterized in that: The second drive assembly (35) includes a threaded shaft (351) which is rotatably connected in the placement seat (31). The two ends of the threaded shaft (351) in the axial direction are respectively threaded and connected to two locking blocks (36), and the two ends of the threaded rod (343) in the axial direction have different thread directions.

6. A special lathe for machining metering pump casings according to claim 5, characterized in that: It also includes a connecting rod (352), a second bevel gear (353) is coaxially and fixedly connected to the threaded shaft (351), and a third bevel gear (354) is rotatably connected to the placement seat (31). The third bevel gear (354) meshes with the second bevel gear (353). The connecting rod (352) is coaxially and fixedly connected to the third bevel gear (354), and one end of the connecting rod (352) away from the third bevel gear (354) is coaxially and fixedly connected to any first bevel gear (342).

7. A special lathe for machining metering pump casings according to claim 6, characterized in that: The end of any of the threaded rods (343) away from the first bevel gear (342) extends to the outside and is fixedly connected to a force-applying handle (344).

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