Hydraulic pump shell concentricity detection device

Abstract

The utility model discloses a hydraulic pump shell concentricity detection device, and belongs to the technical field of hydraulic pump shell concentricity detection. Comprising a rack, a positioning platform, a positioning disc movably embedded in the positioning platform and a multi-shaft supporting arm capable of being magnetically attracted to the positioning platform. A plurality of positioning columns are slidably connected to the positioning disc, a driving mechanism capable of driving the positioning columns to be synchronously away from a center shaft of the positioning disc is arranged on the rack, and the driving mechanism and the positioning disc are synchronously and rotationally connected to the rack; a dial indicator is arranged at the tail end of the multi-axis support arm; the hydraulic pump shell concentricity detection device solves the problems that hydraulic pump shell concentricity detection in the prior art is long in time consumption and high in operation requirement.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic pump casing concentricity detection, in particular to a hydraulic pump casing concentricity detection device. Background Art

[0002] During the production and assembly of hydraulic pump casings, it is crucial to quickly and accurately detect the concentricity of the casing. Traditional inspection methods, such as using a coordinate measuring machine (CMM), offer high accuracy but are often time-consuming, require complex equipment, and require high operational requirements.

[0003] Therefore, there is an urgent need for a hydraulic pump housing concentricity detection device that can accurately complete the detection in a short time, so as to timely discover and correct concentricity problems, thereby improving product qualification rate and production efficiency. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a hydraulic pump housing concentricity detection device, which solves the problems of the prior art hydraulic pump housing concentricity detection being time-consuming and requiring high operation.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a hydraulic pump housing concentricity detection device, comprising a frame, a positioning platform, a positioning plate movably embedded in the positioning platform, and a multi-axis support arm capable of being magnetically adsorbed on the positioning platform;

[0006] The positioning plate is slidably connected to a plurality of positioning posts, and the frame is provided with a driving mechanism capable of driving the plurality of positioning posts to synchronously move away from the central axis of the positioning plate, and the driving mechanism and the positioning plate are synchronously rotatably connected to the frame;

[0007] A dial indicator is provided at the end of the multi-axis support arm.

[0008] Optionally, the positioning plate is provided with a plurality of circular grooves for slidingly embedding the positioning posts, the driving mechanism includes a mounting plate and a transmission shaft rotatably connected to the mounting plate, the transmission shaft is sleeved with a multi-ear connecting seat, and the multi-ear connecting seat is hinged with a plurality of groups of hinged links respectively connected to the positioning posts;

[0009] Wherein, a driving module capable of driving the multi-ear connecting seat to rotate is provided on the installation disk, and a protective shell is provided between the installation disk and the positioning disk.

[0010] Optionally, the driving module includes a transmission gear sleeved on the transmission shaft and a cylinder arranged on the mounting plate, the output end of the cylinder is provided with a rack that can engage with the transmission gear, and the cylinder can drive the rack to move linearly along the tangential direction of the transmission gear.

[0011] Optionally, the articulated link includes a first link hinged to the multi-ear connecting seat and a second link connected to the positioning column, and the first link is hinged to the second link.

[0012] Optionally, the positioning column is hinged to the hinged link.

[0013] Optionally, a sunken groove is provided on the outer periphery of each of the circular grooves, and the bottom of the column head on the positioning column abuts against the bottom of the sunken groove.

[0014] Optionally, a plurality of the positioning posts are distributed circumferentially along the central axis of the positioning plate, and the number of the positioning posts is greater than or equal to three.

[0015] Optionally, the mounting plate is arranged on a hollow rotating platform, and the hollow rotating platform is arranged on the frame.

[0016] Compared with the prior art, the present invention achieves the following beneficial effects: the drive mechanism can drive several positioning posts synchronously away from the central axis of the positioning plate, thereby enabling the positioning posts to support the inner wall of the hydraulic pump housing, thereby quickly completing the fixation of the hydraulic pump housing on the positioning plate. At the same time, because the positioning plate is rotatably connected to the frame, the hydraulic pump housing fixed by the positioning posts can rotate along a fixed rotation axis. Subsequently, by moving the multi-axis support arm and the dial indicator to the appropriate position, the dial indicator head is forced to contact the outer circle or inner hole of the hydraulic pump housing. Then, by rotating the positioning plate, the hydraulic pump housing is rotated along the fixed rotation axis. The concentricity of the hydraulic pump housing can be determined by observing the dial indicator reading and recording the maximum and minimum runout values of the needle. The operation is convenient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural diagram of a hydraulic pump housing concentricity detection device in a preferred embodiment of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of a preferred embodiment of the present invention in which the positioning plate, the mounting plate and the protective shell are mounted on a frame;

[0020] Figure 3 This is a schematic structural diagram of the driving mechanism in a preferred embodiment of the present utility model;

[0021] Among them, 1. Frame; 2. Positioning platform; 3. Positioning plate; 301. Round groove; 302. Sunken groove; 4. Multi-axis support arm; 5. Positioning column; 501. Column head; 6. Micrometer; 7. Mounting plate; 8. Drive shaft; 9. Multi-ear connecting seat; 10. Articulated connecting rod; 1001. First connecting rod; 1002. Second connecting rod; 11. Protective shell; 12. Transmission gear; 13. Cylinder; 14. Rack. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show components related to the present invention.

[0023] It should be noted that if directional indications (such as up, down, bottom, top, etc.) are involved in this embodiment, the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. Example 1

[0024] like Figure 1-Figure 3 As shown, a hydraulic pump casing concentricity detection device includes a frame 1, a positioning platform 2, a positioning plate 3 movably embedded in the positioning platform 2, and a multi-axis support arm 4 that can be magnetically adsorbed on the positioning platform 2; wherein, a plurality of positioning posts 5 are slidably connected to the positioning plate 3, and a driving mechanism that can drive the plurality of positioning posts 5 to synchronously move away from the central axis of the positioning plate 3 is provided on the frame 1, and the driving mechanism and the positioning plate 3 are synchronously rotated and connected to the frame 1.

[0025] Specifically, the positioning platform 2 is provided on the frame 1, and the driving mechanism is capable of driving a plurality of positioning posts 5 to synchronously move away from the central axis of the positioning disk 3, thereby enabling the positioning posts 5 to support the inner wall of the hydraulic pump housing, thereby quickly completing the fixation of the hydraulic pump housing on the positioning disk 3. At the same time, since the positioning disk 3 is rotatably connected to the frame 1, the hydraulic pump housing supported and fixed by the positioning posts 5 can rotate along a fixed rotation axis. Preferably, in this technical solution, the plurality of positioning posts 5 are distributed in a circular pattern along the central axis of the positioning disk 3. The concentricity test mainly detects the outer circle and inner hole of the hydraulic pump housing. The central axis of the outer circle or inner hole of the hydraulic pump housing fixed by the positioning posts 5 coincides with the central axis of the positioning disk 3.

[0026] Furthermore, a micrometer indicator 6 is provided at the end of the multi-axis support arm 4; the multi-axis support arm 4 is conventional. Specifically, the multi-axis support arm 4 comprises multiple sets of hinged arms and a magnetic base. Two adjacent arms can be fixed at any angle, and the magnetic base can be magnetically attached to any position on the positioning platform 2. To test the concentricity of the hydraulic pump housing, the multi-axis support arm 4 and the micrometer indicator 6 need only be moved to the appropriate position, causing the dial of the micrometer indicator 6 to contact the outer circumference or inner bore of the hydraulic pump housing. The hydraulic pump housing is then rotated along the fixed rotation axis by rotating the positioning plate 3. The reading of the micrometer indicator 6 is observed, and the maximum and minimum runout values of the needle are recorded. Specifically, the concentricity deviation value is half the difference between the maximum and minimum runout values of the needle. To determine whether the concentricity is acceptable, the measurement results must be compared with the design standard or the allowable tolerance value. If the deviation value is within the tolerance range, the concentricity is acceptable; otherwise, the concentricity is unacceptable.

[0027] As mentioned above, the driving mechanism can be selected from the three-jaw chuck, pneumatic chuck, etc. in the prior art. In this technical solution, preferably, in order to reduce the cost, such as Figure 2 、 Figure 3 As shown, the positioning disk 3 is provided with a plurality of circular grooves 301 for slidingly embedding the positioning posts 5. The driving mechanism includes a mounting disk 7 and a transmission shaft 8 rotatably connected to the mounting disk 7. A multi-ear connecting seat 9 is sleeved on the transmission shaft 8. The multi-ear connecting seat 9 is hinged with a plurality of groups of articulated links 10 respectively connected to the positioning posts 5. The transmission shaft 8 rotates synchronously with the multi-ear connecting seat 9, and can pull the positioning posts 5 to move along the circular grooves 301 through the articulated links 10, thereby driving the plurality of positioning blocks to synchronously approach or move away from the central axis of the positioning disk 3.

[0028] Among them, a driving module that can drive the multi-ear connecting seat 9 to rotate is provided on the mounting disk 7, and a protective shell 11 is provided between the mounting disk 7 and the positioning disk 3. The protective shell 11 can be covered on the outside of the driving mechanism to protect the internal structure while connecting the mounting disk 7 and the positioning disk 3 so that the mounting disk 7 and the positioning disk 3 can rotate synchronously.

[0029] Further, such as Figure 3 As shown, the drive module includes a transmission gear 12 sleeved on the transmission shaft 8 and a cylinder 13 arranged on the mounting plate 7. The output end of the cylinder 13 is provided with a rack 14 that can engage with the transmission gear 12. The cylinder 13 can drive the rack 14 to move linearly along the tangential direction of the transmission gear 12, thereby driving the transmission gear 12 to rotate through the linear movement of the rack 14, and then driving the transmission shaft 8 and the multi-ear connecting seat 9 to rotate.

[0030] In this embodiment, the articulated link 10 includes a first link 1001 articulated to the multi-ear connecting seat 9 and a second link 1002 connected to the positioning column 5, and the first link 1001 is articulated to the second link 1002. When the multi-ear connecting seat 9 rotates, the positioning column 5 can be pulled to move along the circular groove 301 through the relative rotation and angle change of the first link 1001 and the second link 1002, until the first link 1001 rotates to abut against the multi-ear connecting seat 9, and the first link 1001 and the multi-ear connecting seat 9 are relatively stationary. When the multi-ear connecting seat 9 continues to rotate, the first link 1001 rotates along with the multi-ear connecting seat 9, and can also further pull the positioning column 5 to continue rotating along the circular groove 301, thereby increasing the displacement distance of the positioning column 5 and improving the applicability of the hydraulic pump housing concentricity detection device.

[0031] Furthermore, the positioning post 5 is hinged to the hinge link 10 to reduce friction between the positioning post 5 and the sidewalls of the circular groove 301. At the same time, each circular groove 301 is provided with a sunken groove 302 on its periphery, and the bottom of the post head 501 on the positioning post 5 abuts against the bottom of the sunken groove 302.

[0032] In this technical solution, in order to improve the accuracy and stability of the positioning of the hydraulic pump housing by the positioning column 5, several positioning columns 5 are distributed in a circle along the central axis of the positioning plate 3, and the number of positioning columns 5 is greater than or equal to three. The positioning columns 5 greater than three are evenly spaced. When they are synchronously moved away from the central axis of the positioning plate 3 and supported on the inner wall of the hydraulic pump housing, they can correct the position of the hydraulic pump housing, thereby improving the positioning accuracy. Example 2

[0033] like Figure 1-Figure 3 As shown, based on the first embodiment, the mounting plate 7 is arranged on a hollow rotating platform, and the hollow rotating platform is arranged on the frame 1. The hollow rotating platform can drive the mounting plate 7 to rotate uniformly and stably, which is convenient for operators to use.

[0034] Working Principle: First, the hydraulic pump housing is placed on the positioning plate 3, with the opening in the hydraulic pump housing housing enclosing several positioning posts 5. Cylinder 13 then drives rack 14 to move linearly along the tangential direction of transmission gear 12. This linear motion of rack 14 drives transmission gear 12, transmission shaft 8, and multi-lug connector 9 to rotate. The transmission shaft 8 and multi-lug connector 9 rotate synchronously, pulling positioning posts 5 along the circular groove 301 via first and second connecting rods 1001 and 1002. Several positioning blocks are then simultaneously moved away from the central axis of the positioning plate 3, resting against the inner wall of the hydraulic pump housing opening, positioning and securing the hydraulic pump housing on the positioning plate 3. Subsequently, the multi-axis support arm 4 and dial indicator 6 are moved to the appropriate position, causing the dial indicator 6 to contact the outer diameter or inner hole of the hydraulic pump housing. The hydraulic pump housing is then rotated along the rotation axis of the positioning plate 3 by rotating the positioning plate 3. The reading of dial indicator 6 is observed, and the maximum and minimum runout values of the dial indicator needle are recorded. Specifically, the concentricity deviation is half the difference between the maximum and minimum needle runout. To determine if concentricity is acceptable, the measurement results must be compared with the design standard or the allowable tolerance. If the deviation is within the tolerance, the concentricity is acceptable; otherwise, the concentricity is unacceptable.

[0035] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A hydraulic pump housing concentricity detection device, characterized by: It comprises a frame (1), a positioning platform (2), a positioning plate (3) movably embedded on the positioning platform (2), and a multi-axis support arm (4) capable of being magnetically adsorbed on the positioning platform (2); The positioning disk (3) is slidably connected to a plurality of positioning posts (5), and the frame (1) is provided with a driving mechanism capable of driving the plurality of positioning posts (5) to synchronously move away from the central axis of the positioning disk (3), and the driving mechanism and the positioning disk (3) are synchronously rotatably connected to the frame (1); A dial indicator (6) is provided at the end of the multi-axis support arm (4).

2. The hydraulic pump housing concentricity detection device according to claim 1, characterized in that: The positioning plate (3) is provided with a plurality of circular grooves (301) for slidingly embedding the positioning columns (5); the driving mechanism comprises a mounting plate (7) and a transmission shaft (8) rotatably connected to the mounting plate (7); a multi-ear connecting seat (9) is sleeved on the transmission shaft (8); and a plurality of articulated connecting rods (10) are hingedly connected to the multi-ear connecting seat (9) and are respectively connected to the positioning columns (5); Wherein, a driving module capable of driving the multi-ear connecting seat (9) to rotate is provided on the installation disk (7), and a protective shell (11) is provided between the installation disk (7) and the positioning disk (3).

3. The hydraulic pump housing concentricity detection device according to claim 2, characterized in that: The driving module comprises a transmission gear (12) sleeved on the transmission shaft (8) and a cylinder (13) arranged on the mounting plate (7); an output end of the cylinder (13) is provided with a rack (14) capable of engaging with the transmission gear (12); and the cylinder (13) is capable of driving the rack (14) to move in a tangential linear direction along the transmission gear (12).

4. The hydraulic pump housing concentricity detection device according to claim 2, characterized in that: The hinged link (10) comprises a first link (1001) hinged to the multi-ear connection seat (9) and a second link (1002) connected to the positioning column (5), wherein the first link (1001) and the second link (1002) are hinged.

5. The hydraulic pump housing concentricity detection device according to claim 2, characterized in that: The positioning column (5) is hinged to the hinged link (10).

6. The hydraulic pump housing concentricity detection device according to claim 2, characterized in that: A sunken groove (302) is provided on the outer periphery of each of the circular grooves (301), and the bottom of the column head (501) on the positioning column (5) abuts against the bottom of the sunken groove (302).

7. The hydraulic pump housing concentricity detection device according to claim 1, characterized in that: The plurality of positioning posts (5) are distributed in a circular pattern along the central axis of the positioning plate (3), and the number of the positioning posts (5) is greater than or equal to three.

8. The hydraulic pump housing concentricity detection device according to claim 2, characterized in that: The mounting plate (7) is arranged on a hollow rotating platform, and the hollow rotating platform is arranged on the frame (1).

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