CN213516168U - Hydraulic force standard machine - Google Patents

Abstract

The utility model relates to a fluid pressure type force standard machine relates to the technical field of force standard machine, and it includes the main part device, install in work cylinder on the main part device with install in reverser on the main part device, work cylinder's piston rod with be provided with movable assembly between the reverser, movable assembly including install in bulb on the reverser with install in ball seat on work cylinder's the piston rod, the bulb with the ball seat is floated and is connected. This application is through reverser, movable assembly and the setting of supporting tight subassembly for hydraulic pressure type force standard machine is at the measurement process, and staff's accessible supports tight subassembly and comes to apply force to the reverser, thereby reduces the reverser and takes place the probability of deformation along with the increase of hydraulic pressure type force standard machine live time.

Description

Hydraulic force standard machine

Technical Field

The application relates to the technical field of force standard machines, in particular to a hydraulic force standard machine.

Background

The force standard machine can be divided into a dead weight type, a lever type, a hydraulic type, a superposition type and the like according to the structure. The hydraulic force standard machine is characterized in that the force generated by a weight is amplified by a hydraulic system to be used as a standard load. The hydraulic force standard machine is a force standard device designed and manufactured based on the Pascal principle, takes the gravity of a weight as a standard force value, and automatically and stably applies the force value to a force standard machine on a detected force instrument according to a preset sequence after the force value is amplified by a combined oil circuit system of two groups of oil cylinder pistons.

In the related art, a hydraulic force standard machine generally includes a reverser for changing a direction of an acting force, a piston rod of an oil cylinder is generally abutted against a bottom surface of an upper pulling plate of the reverser, and with the use of the hydraulic force standard machine, most of the acting force applied to the upper pulling plate of the reverser by the piston rod of the oil cylinder is concentrated on a central area of the upper pulling plate of the reverser, so that the central area of the upper pulling plate of the reverser is likely to be deformed, thereby affecting the measurement accuracy of the hydraulic force standard machine.

In view of the above-mentioned related art, the inventors believe that the hydraulic force standard machine has a drawback in that the measurement accuracy gradually decreases as the use time increases.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the measurement accuracy of a hydraulic force standard machine is reduced along with the increase of the service time, the application provides a hydraulic force standard machine.

The application provides a hydraulic pressure type force standard machine adopts following technical scheme:

a hydraulic force standard machine comprises a main body device, a working oil cylinder and a reverser, wherein the working oil cylinder is arranged on the main body device, the reverser is arranged on the main body device, a movable assembly is arranged between a piston rod of the working oil cylinder and the reverser, the movable assembly comprises a ball head arranged on the reverser and a ball seat arranged on the piston rod of the working oil cylinder, and the ball head and the ball seat are in floating connection.

By adopting the technical scheme, the reverser is arranged to change the direction of the acting force; the movable assembly is arranged, so that the piston rod of the working oil cylinder and the reverser can rotate relatively, and the probability that the piston rod of the working oil cylinder is damaged by acting force generated when the reverser deforms is reduced. The cooperation of floating connection between bulb and the ball seat for after the reverser takes place micro-deformation, bulb on the reverser can change the position with the cooperation between the ball seat, and the great degree has reduced because of the damage that the reverser warp to the piston rod production of working cylinder, thereby improves the measurement accuracy of fluid pressure type force standard machine.

Optionally, the main body device is provided with a tightening assembly, the tightening assembly includes at least one tightening cylinder, and the tightening cylinder and the working cylinder are located on two opposite sides of the reverser.

By adopting the technical scheme, the arrangement of the abutting component enables the reverser to be subjected to acting forces in two opposite directions of the abutting oil cylinder and the working oil cylinder, so that the probability of deformation of the reverser due to local concentrated stress is reduced, and the measurement precision of the hydraulic force standard machine is improved.

Optionally, the main body device further comprises a frame and a moving mechanism slidably mounted on the frame, and the working oil cylinder is mounted on the frame.

Through adopting above-mentioned technical scheme, moving mechanism's setting provides the platform that the object that awaits measuring loaded, and when needs carry out measurement work, on the staff placed moving mechanism with the object that awaits measuring, moving mechanism took place the displacement along vertical direction and is close to the work hydro-cylinder, and the work hydro-cylinder receives standard pressure and applys pressure to the object that awaits measuring, accomplishes the measurement work to the object that awaits measuring.

Optionally, the rack includes a base, four columns installed on the base, and an upper beam installed on the columns, and the moving mechanism is slidably installed between the base and the upper beam.

Through adopting above-mentioned technical scheme, the setting of base, stand and entablature plays the limiting displacement to the mobility mechanism activity region in the frame.

Optionally, the reverser comprises a reverser lower pressing plate installed on the base, a reverser lower pull rod installed on the reverser lower pressing plate, a reverser upper pressing plate installed at the top end of the reverser lower pull rod, a reverser upper pull rod installed on the reverser upper pressing plate and a reverser upper pull plate installed at the top end of the reverser upper pull rod, the reverser upper pressing plate is located between the base and the upper beam, the reverser upper pull rod penetrates through the top surface of the upper beam, and the working oil cylinder is installed between the reverser upper pull plate and the upper beam.

Through adopting above-mentioned technical scheme, the effect of transmission standard pressure is played in the setting of reverser top board, and the setting of reverser top board and reverser holding down plate plays and becomes to press to and draw the effect of two kinds of forces with standard pressure output.

Optionally, the moving mechanism includes two screws installed between the upper beam and the base, a moving beam slidably installed on the screws, a barrel rotatably connected to the moving beam, and a driving assembly installed on the moving beam, a screw thread engaged with the screws is provided on an inner wall of the barrel, and the driving assembly is used for driving the barrel to rotate.

By adopting the technical scheme, the driving assembly is arranged to drive the movable beam to axially displace along the screw rod, so that the pressure measurement of the object to be measured on the movable beam is facilitated; meanwhile, the movable beam divides the space between the upper pressure plate and the lower pressure plate of the reverser into a pulling direction and a pressing direction to two working areas.

Optionally, the driving assembly comprises a servo motor installed on the end wall of the movable beam, a worm connected to an output shaft of the servo motor in a key connection mode, and a worm wheel meshed with the worm, the worm is rotatably connected to the movable beam, and the outer wall of the threaded sleeve is fixedly connected with the inner wall of the worm wheel.

Through adopting above-mentioned technical scheme, when needs adjust the position of walking beam on the lead screw, start servo motor, servo motor's output shaft drives the worm and takes place to rotate, and the worm drives the worm wheel rather than meshing and takes place to rotate, and the worm wheel drives the swivel nut and takes place to rotate, and the swivel nut changes with lead screw thread fit's position to make the walking beam change the position on the lead screw, realize the adjustment to the walking beam position.

Optionally, the number of the working oil cylinders is five, four of the working oil cylinders are distributed on the upper pulling plate of the reverser in a diamond shape, and the fifth working oil cylinder is located at the center of the four working oil cylinders.

Through adopting above-mentioned technical scheme, the setting of measuring component plays the effect that produces standard pressure, and the setting of dynamometry hydro-cylinder plays the effect of passing through the parallel oil circuit with standard pressure to work hydro-cylinder department.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the reverser, the movable assembly and the abutting assembly, in the measuring process of the hydraulic force standard machine, a worker can apply force to the reverser through the abutting assembly, so that the probability of deformation of the reverser along with the increase of the service time of the hydraulic force standard machine is reduced;

2. through the arrangement of the five working oil cylinders, a worker can control the four working oil cylinders distributed in a diamond shape to work independently or the working oil cylinder positioned in the center of the four working oil cylinders to work independently or the five working oil cylinders to work simultaneously through the parallel oil passages, and further the hydraulic force standard machine obtains a larger measuring range.

Drawings

Fig. 1 is a schematic perspective view of a hydraulic force standard machine in embodiment 1 of the present application;

FIG. 2 is a perspective view of the force measuring device of FIG. 1;

fig. 3 is a partially enlarged structural view of a portion a shown in fig. 2;

FIG. 4 is a schematic perspective view of the main body apparatus shown in FIG. 1;

FIG. 5 is a cross-sectional structural view of the walking beam shown in FIG. 4;

FIG. 6 is a cross-sectional structural view of the working cylinder shown in FIG. 4;

fig. 7 is a schematic perspective view of a hydraulic force standard machine in embodiment 2 of the present application;

FIG. 8 is a schematic view of the reverser upper pulling plate shown in FIG. 7 in a normal operating condition;

fig. 9 is a schematic view of the inverter of fig. 7 after deformation of the pull-up plate.

Description of reference numerals: 100. a support; 101. a chassis; 102. a fan-shaped sheet; 103. a top tray; 110. a measurement assembly; 111. a central boom; 112. a weight tray; 113. a weight tray; 114. a connecting rod; 115. a force measuring reverser; 120. a force measuring oil cylinder; 130. installing a disc; 140. a mounting member; 141. a motor; 142. mounting blocks; 143. a slide bar; 144. a horizontal bar; 145. a cam; 150. a frame; 151. a base; 152. a column; 153. an upper beam; 160. a moving mechanism; 161. a lead screw; 162. a moving beam; 163. a threaded sleeve; 164. a drive assembly; 1641. a servo motor; 1642. a worm; 1643. a worm gear; 170. an inverter; 171. a reverser lower pull rod; 172. a reverser lower pressing plate; 173. an inverter upper platen; 174. the reverser is provided with a pull rod; 175. a reverser upper pulling plate; 180. a working oil cylinder; 190. a ball seat; 200. a ball head; 210. mounting a plate; 220. tightly support the oil cylinder.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment 1 of the application discloses a hydraulic pressure type force standard machine. Referring to fig. 1, the hydraulic force standard machine includes a body device, a force measuring device and a parallel oil path connected between the body device and the force measuring device, the force measuring device is used for generating a standard pressure, and the body device is used for applying the standard pressure generated by the force measuring device to an object to be measured.

Referring to fig. 1, the force measuring device comprises a bracket 100, a measuring assembly 110 fixedly mounted on the bracket 100, and a load cylinder 120 fixedly mounted on the top end of the bracket 100.

Referring to fig. 2, the bracket 100 includes a bottom plate 101, a segment 102 fixedly mounted on the bottom plate 101, and a top plate 103 fixedly mounted on the top end of the segment 102, and a mounting disk 130 is fixedly mounted at the center of the top plate 103.

Referring to fig. 2, the measuring assembly 110 includes a central suspension rod 111 fixedly mounted on the mounting disc 130, a weight tray 112 fixedly mounted on the central suspension rod 111, a weight tray 113 slidably mounted on the central suspension rod 111, two connecting rods 114 fixedly mounted on the mounting disc 130, and a force measuring reverser 115 fixedly mounted on the top ends of the two connecting rods 114. The weight trays 112 are used for supporting the weight plates 113, the weight trays 112 correspond to the weight plates 113 one by one, the number of the weight trays 112 and the number of the weight plates 113 can be six, seven or eight, and the weight trays 112 and the weight plates 113 can be arranged in any number to generate standard pressure. The position of the weight tray 112 on the central boom 111 is lower than the position of the weight tray 113 corresponding to the weight tray 112. The load cell cylinder 120 is fixedly mounted to the top of the load reverser 115.

Referring to fig. 2, the number of the sector plates 102 may be three, four, or five, but any number may be provided to support the weight plates 113. The three fan-shaped pieces 102 are fixedly connected to the chassis 101 along the circumferential direction of the chassis 101, six mounting pieces 140 are arranged on the fan-shaped pieces 102 along the vertical direction, the mounting pieces 140 are used for supporting the weight plates 113, the number of the mounting pieces 140 can be seven or eight, and the weight plates 113 can be supported by the mounting pieces 140.

Referring to fig. 2 and 3, the mounting member 140 includes a motor 141 fixedly mounted on the inner wall of the segment 102, two mounting blocks 142 fixedly mounted on the inner wall of the segment 102, a sliding rod 143 slidably mounted on the two mounting blocks 142, a horizontal rod 144 fixedly mounted on the sliding rod 143, and a cam 145 key-connected to the output shaft of the motor 141. The two mounting blocks 142 are positioned above the motor 141, the sliding rod 143 sequentially penetrates through the two mounting blocks 142 along the vertical direction and abuts against the cam 145, the horizontal rod 144 is positioned between the two mounting blocks 142, and the horizontal rod 144 is used for abutting against the weight tray 112 on the central suspension rod 111.

When the hydraulic force standard machine is not in use, the output shaft of the motor 141 drives the cam 145 to rotate, the cam 145 pushes the sliding rod 143 to displace along the vertical upward direction, the horizontal rod 144 on the sliding rod 143 displaces along the vertical upward direction, and the horizontal rod 144 abuts against the weight tray 113 and pushes the weight tray 133 to be far away from the weight tray 112.

When the hydraulic force standard machine is in a working state, the output shaft of the motor 141 drives the cam 145 to rotate, the cam 145 changes the position abutted against the bottom end of the sliding rod 143, the sliding rod 143 moves along the vertical downward direction, the horizontal rod 144 on the sliding rod 143 moves along the vertical downward direction, the horizontal rod 144 is far away from the weight tray 133, and the weight tray 113 falls on the weight tray 112.

Referring to fig. 1, the main body device includes a frame 150, a moving mechanism 160 slidably mounted on the frame 150, an inverter 170 fixedly mounted on the frame 150, and five working cylinders 180 mounted on the frame 150, and parallel oil paths are connected between the working cylinders 180 and the load cells 120. The parallel oil circuit divides the five working oil cylinders 180 into two working oil cylinder groups, wherein one working oil cylinder group comprises four working oil cylinders 180, and the other working oil cylinder group comprises one working oil cylinder 180.

Referring to fig. 4, the frame 150 includes a base 151, four columns 152 fixedly mounted on the base 151, and an upper beam 153 fixedly mounted on the columns 152, and the moving mechanism 160 is slidably mounted between the base 151 and the upper beam 153.

Referring to fig. 4 and 5, the moving mechanism 160 includes two lead screws 161 fixedly installed between the upper beam 153 and the base 151, a moving beam 162 slidably installed on the lead screws 161, a screw sleeve 163 rotatably connected to the moving beam 162, and a driving assembly 164 installed on the moving beam 162. The driving assembly 164 includes a servo motor 1641 fixedly installed on an end wall of the movable beam 162, a worm 1642 key-connected to an output shaft of the servo motor 1641, and two worm wheels 1643 engaged with the worm 1642.

Referring to fig. 5, a mounting hole for mounting a worm wheel 1643 is formed in the moving beam 162 along the vertical direction, the worm 1642 extends into the moving beam 162 and is engaged with the two worm wheels 1643, the screw sleeve 163 is fixedly connected to the inner wall of the worm wheel 1643, and a screw thread matched with the screw 161 is formed on the inner wall of the screw sleeve 163.

Referring to fig. 4, the inverter 170 includes an inverter mounted on the top surface of the upper beam 153, and the inverter includes four inverter lower links 171 fixedly mounted on the base 151, an inverter lower pressing plate 172 fixedly mounted on the bottom ends of the inverter lower links 171, an inverter upper pressing plate 173 fixedly mounted on the top ends of the inverter lower links 171, an inverter upper pull rod 174 fixedly mounted on the top surface of the inverter upper pressing plate 173, and an inverter upper pull plate 175 fixedly mounted on the top ends of the inverter upper pull rods 174.

Referring to fig. 4 and 6, the inverter upper pressing plate 173 is located between the base 151 and the upper beam 153, the moving beam 162 is located between the inverter upper pressing plate 173 and the inverter lower pressing plate 172, and the moving beam 162 divides a space between the inverter upper pressing plate 173 and the inverter lower pressing plate 172 into pressing and pulling toward two working areas. The reverser upper tie rod 174 passes through the top surface of the upper beam 153, five working cylinders 180 are fixedly mounted on the top surface of the upper beam 153, and piston rods of the five working cylinders 180 abut against the bottom surface of the reverser upper tie plate 175. The four working cylinders 180 are distributed along the top surface of the upper beam 153 in a diamond shape, and the fifth working cylinder 180 is located at the center of the diamond shape surrounded by the four working cylinders 180.

Referring to fig. 4 and 8, five bulbs 200 are fixedly connected to the bottom surface of the reverser upper pulling plate 175, one end of the bulb 200 close to the reverser upper pulling plate 175 is fixedly connected to the reverser upper pulling plate 175, and one end of the bulb 200 far from the reverser upper pulling plate 175 is arc-shaped. The end of the piston rod of the working cylinder 180 is fixedly connected with a ball seat 190, and one end of the ball seat 190 far away from the working cylinder 180 is provided with an arc-shaped groove.

The implementation principle of the embodiment 1 is as follows:

when the object to be measured needs to be measured, the object to be measured is placed on the movable beam 162, the servo motor 1641 is started, the output shaft of the servo motor 1641 drives the worm 1642 to rotate, the worm 1642 drives the two worm wheels 1643 engaged with the worm to rotate, the worm wheels 1643 drive the threaded sleeve 163 to rotate, and the movable beam 152 displaces along the vertical upward direction until the object to be measured on the movable beam 162 moves to a certain height.

Then the motor 141 is started, the output shaft of the motor 141 drives the cam 145 to rotate, the cam 145 changes the position abutted against the bottom end of the sliding rod 143, the sliding rod 143 moves in the vertical downward direction, the horizontal rod 144 on the sliding rod 143 moves in the vertical downward direction, the horizontal rod 144 is far away from the weight tray 133, and the weight tray 113 falls on the weight tray 112.

After receiving the gravity of the weight tray 113, the weight tray 112 is transmitted to the force measuring reverser 115 through the central suspension rod 111 and the connecting rod 114, the force measuring reverser 115 transmits the action to the force measuring cylinder 120, the force measuring cylinder 120 converts the action into standard pressure and transmits the standard pressure to the working cylinder 180 through the parallel oil circuit, and the working cylinder 180 applies the standard pressure to the object to be measured, thereby completing the measurement work.

Example 2

Example 2 differs from example 1 in that:

referring to fig. 7 and 8, two mounting columns are fixedly connected to the top surface of the upper beam 153, the two mounting columns are respectively located on two opposite sides of the reverser upper pulling plate 175, mounting plates 210 are fixedly connected to the tops of the two mounting columns, and the mounting plates 210 are located right above the reverser upper pulling plate 175. The side of the mounting plate 210 adjacent to the side of the upper puller plate 175 of the reverser is provided with a retaining assembly. The abutting assembly comprises an abutting oil cylinder 220, the abutting oil cylinder 220 is fixedly connected to one side face of the mounting plate 210 close to the reverser upper pulling plate 175, and a piston rod of the abutting oil cylinder 220 abuts against and is fixedly connected with the top face of the reverser upper pulling plate 175.

Referring to fig. 8 and 9, compared with the case that the tightening cylinder 220 is not provided, the setting of the tightening cylinder 220 further applies an acting force to the reverser upper pulling plate 175, so that the reverser upper pulling plate 175 is subjected to two sets of forces in opposite directions of the tightening cylinder 220 and the working cylinder 180, the probability of deformation of the reverser upper pulling plate 175 is reduced, and the measurement accuracy of the hydraulic force standard machine is further improved.

The working principle of the embodiment 2 is as follows:

when the object to be measured is measured, the tightening cylinder 220 does not work, and the piston rod of the tightening cylinder 220 is in a movable state. After the measurement of the object to be measured is completed, the tightening cylinder 220 is started, the piston rod of the tightening cylinder 220 is tightened against the upper pull plate 175 of the reverser, and the same acting force as the working cylinder 180 acts on the upper pull plate 175 of the reverser for the same time, so that the deformation probability of the upper pull plate 175 of the reverser is reduced, and the measurement precision of the hydraulic force standard machine is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A hydraulic force standard machine is characterized in that: the ball head device comprises a main body device, a working oil cylinder (180) arranged on the main body device and a reverser (170) arranged on the main body device, wherein a movable assembly is arranged between a piston rod of the working oil cylinder (180) and the reverser (170), the movable assembly comprises a ball head (200) arranged on the reverser (170) and a ball seat (190) arranged on the piston rod of the working oil cylinder (180), and the ball head (200) and the ball seat (190) are in floating connection.

2. A hydraulic force gauge machine according to claim 1, wherein: the main body device is provided with a tight abutting assembly, the tight abutting assembly comprises at least one tight abutting oil cylinder (220), and the tight abutting oil cylinder (220) and the working oil cylinder (180) are located on two opposite sides of the reverser (170).

3. A hydraulic force gauge machine according to claim 1, wherein: the main body device further comprises a rack (150) and a moving mechanism (160) which is installed on the rack (150) in a sliding mode, and the working oil cylinder (180) is installed on the rack (150).

4. A hydraulic force gauge machine according to claim 3, wherein: the rack (150) comprises a base (151), four upright posts (152) arranged on the base (151) and an upper beam (153) arranged on the upright posts (152), wherein the moving mechanism (160) is arranged between the base (151) and the upper beam (153) in a sliding manner.

5. A hydraulic force gauge machine according to claim 4, wherein: the reverser (170) comprises a reverser lower pressing plate (172) arranged on the base (151), a reverser lower pull rod (171) arranged on the reverser lower pressing plate (172), a reverser upper pressing plate (173) arranged at the top end of the reverser lower pull rod (171), a reverser upper pull rod (174) arranged on the reverser upper pressing plate (173) and a reverser upper pull plate (175) arranged at the top end of the reverser upper pull rod (174), wherein the reverser upper pressing plate (173) is positioned between the base (151) and the upper beam (153), the reverser upper pull rod (174) penetrates through the top surface of the upper beam (153), and the working oil cylinder (180) is arranged between the reverser upper pull plate (175) and the upper beam (153).

6. A hydraulic force gauge machine according to claim 4, wherein: the moving mechanism (160) comprises two lead screws (161) arranged between the upper beam (153) and the base (151), a moving beam (162) arranged on the lead screws (161) in a sliding mode, a threaded sleeve (163) connected to the moving beam (162) in a rotating mode and a driving assembly (164) arranged on the moving beam (162), lead screw threads matched with the lead screws (161) are arranged on the inner wall of the threaded sleeve (163), and the driving assembly (164) is used for driving the threaded sleeve (163) to rotate.

7. A hydraulic force gauge machine according to claim 6, wherein: the driving assembly (164) comprises a servo motor (1641) arranged on the end wall of the moving beam (162), a worm (1642) connected to an output shaft of the servo motor (1641) in a key mode and a worm wheel (1643) meshed with the worm (1642), the worm (1642) is connected to the moving beam (162) in a rotating mode, and the outer wall of the screw sleeve (163) is fixedly connected with the inner wall of the worm wheel (1643).

8. A hydraulic force gauge machine according to claim 5, wherein: the number of the working oil cylinders (180) is five, wherein four working oil cylinders (180) are distributed on the reverser upper pulling plate (175) in a diamond shape, and the fifth working oil cylinder (180) is positioned at the center of the four working oil cylinders (180).

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