CN109738145B - A hand-held mechanical energy storage vibration exciter - Google Patents

Abstract

The invention relates to a hand-held mechanical energy-storage vibration exciter in the technical field of modal testing experiments, comprising the following parts: a main body base with a telescopic movable cavity; a main sliding rod movable through the main body base and through the telescopic movable cavity; The tooth surface slider that moves in the telescopic movable cavity; the acceleration sensing component installed on the impact end of the main sliding rod; the casing combined with the lower side of the main base of the main body and has a built-in excitation mechanism; the handle connected to the outer wall of the casing ; energy storage system; buffer system; plane positioning system; wherein, the energy storage system includes an operating handle, an energy storage spring, and an adjustment tailstock; the buffer system includes a partition piston built into the telescopic movable cavity, and the partition piston moves the teeth in the telescopic movable cavity. The part before the surface slider is divided into a high pressure buffer cavity and a low pressure buffer cavity; the plane positioning system includes a positioning ring, a positioning ring cylinder, a built-in spring, and a ventilation channel. The operation is convenient, the controllability is good, and the phenomenon of "double-click" can be effectively avoided in the working process.

Description

A hand-held mechanical energy storage vibration exciter

technical field

The invention relates to the technical field of modal testing experiments, in particular to a movable vibration excitation system.

Background technique

The modal test experiment is the main experimental method to analyze the dynamic characteristics of the component structure. The main function of the excitation system is to shock and vibrate the measured workpiece according to a certain form and size. At this stage, the more common vibration excitation systems include fixed vibration exciters or mobile vibration excitation systems. Among them, the mobile excitation system has been widely used due to its good portability, flexible and convenient testing process.

At this stage, the most mobile vibration excitation systems used in engineering tests are mainly force hammers. During the test, the experimenter hits the workpiece once with a hand hammer to complete the excitation of the workpiece to be tested. The force hammer has high requirements for the operator: during the knocking process, the direction and strength of the moment of the knock will have a greater impact on the test results; and after the force hammer hits the workpiece to be tested, the operator will The hammer should be retracted quickly to prevent "double-click" on the workpiece from affecting the test results. Consequently, conventional hammer operations place high demands on the operator. There are defects such as difficulty in operation, difficulty in controlling the striking force, difficulty in grasping the striking direction and striking position, and low operation efficiency.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a hand-held mechanical energy storage vibration exciter, which is convenient to operate, has good controllability, lower requirements for operators, and can effectively avoid the phenomenon of "double-click" in the working process, thereby having High work efficiency, and can perform precise point and directional excitation operations that are difficult to perform with traditional mobile vibration excitation equipment.

The purpose of the present invention is achieved in this way: a hand-held mechanical energy storage vibration exciter, comprising the following parts:

Main body base with telescopic movable cavity;

A main sliding rod that runs through the main body of the body and passes through the telescopic movable cavity, and both ends are exposed;

A tooth surface slider that is coaxially combined with the main sliding rod and moves in the telescopic movable cavity;

The acceleration sensing component installed on the impact end of the main slide rod;

A receiver with a built-in excitation mechanism combined with the lower side of the main body of the main body;

a handle attached to the outer wall of the receiver;

Energy storage system; buffer system; plane positioning system;

Wherein, the above-mentioned acceleration sensing assembly includes a hammer head and an acceleration sensor connected with the analytical instrument, and the hammer head, the acceleration sensor, and the impact end of the main sliding rod are detachably connected in sequence from front to back along the length of the main sliding rod;

The outer surface of the tooth surface slider is arranged with a number of teeth evenly distributed along the axis direction of the tooth surface slider, and a tooth slot is formed between any two adjacent teeth. Slot selective locking fit;

The energy storage system includes an operation handle, an energy storage spring, and an adjustment tailstock. The operation handle is installed at the control end of the main slide rod. The adjustment tailstock is threadedly sleeved at one end of the adjacent operation handle of the main body and seals the telescopic operation. A movable cavity, the main sliding rod is movably fitted with an adjustment tail seat, a front end cover that seals the telescopic movable cavity is installed on the main body main seat, the energy storage spring is sleeved on the main sliding rod, and one end of the energy storage spring is installed. Connected with the adjustment tailstock, the other end of the energy storage spring abuts the tooth surface slider when the energy is stored;

The buffer system includes a separation piston built in the telescopic movable cavity, the separation piston is sleeved on the main sliding rod and can move axially along the main sliding rod. The part is divided into a high pressure buffer cavity and a low pressure buffer cavity, and the high pressure buffer cavity and the low pressure buffer cavity are arranged in sequence from front to back;

The plane positioning system includes a positioning ring, a positioning ring cylinder, a built-in spring, and a ventilation channel. The cylinder barrel of the positioning ring cylinder is integrated with the front part of the main body base, and the piston rod of the positioning ring cylinder faces the main body base. The front part of the locating ring is installed on the piston rod of the locating ring cylinder, the axis of the locating ring is coincident with the axis of the main sliding rod, the locating ring is facing the acceleration sensing assembly and can accommodate the acceleration sensing assembly. Through, the inner spring is placed in the rodless cavity of the cylinder barrel of the positioning ring cylinder, the two ends of the inner spring are respectively connected to the piston of the positioning ring cylinder and the inner wall of the cylinder barrel of the positioning ring cylinder, and one end of the ventilation passage is connected to a low pressure A buffer cavity, the other end of the ventilation channel is connected to a rod cavity of the cylinder barrel of the positioning ring cylinder.

Further, the excitation mechanism includes a stub, a stub pivot, a return spring, and a trigger, the stub is connected in the casing through the stub pivot, and a lock is provided on the upper side of the locking end of the stub. When facing and inserting the locking hook of one of the tooth slots of the tooth surface slider, the main body main seat is provided with a locking and abdicating hole that communicates with the telescopic movable cavity and the inner cavity of the casing, and the locking and abdicating hole is directly For the locking hook, the lower side of the locking end of the sear is elastically connected to the inner wall of the casing through a return spring, the trigger is arranged on the casing to rotate and is used to drive the sear to rotate, and the trigger is provided with an exposed trigger department.

Further, the outer wall of the main body seat is cylindrical, the buffer system includes a pressure regulating slide valve, and the pressure regulating slide valve is a C-shaped arc-shaped cross-section, and is sleeved on the outer wall of the main body main seat in a rotatable manner. The position of the low pressure buffer cavity corresponds to the position of the pressure regulating slide valve, the main body main seat is provided with a plurality of pressure relief holes arranged in a straight row along its axial direction, and the pressure regulating slide valve There is a spirally extending pressure relief strip hole, the width of the pressure relief strip hole is adapted to the aperture of a single pressure relief hole, the pressure relief strip hole is selectively connected to one of the pressure relief holes, and the pressure relief hole It is communicated with the telescopic movable cavity and corresponds to a part of the pressure relief hole in the low-pressure buffer cavity when in use.

Further, the trigger includes a movable member and a trigger pivot, the movable member is arranged in the receiver through the trigger pivot, the movable member includes a front extension portion and a rear extension portion inside the receiver, the The front extension part and the rear extension part are arranged front and rear with the trigger pivot as the criterion and are located on two opposite sides of the trigger pivot; the trigger part is arranged on the movable part and is integrated with the front extension part and the rear extension part. The trigger mechanism includes an adjustment bolt threaded on the casing, the front end of the front extension part is provided with an interference slope that abuts against the threaded part of the adjustment bolt, and the rear extension part abuts the end of the sear opposite to the locking hook.

Further, the buffer system includes a pressure regulating safety valve, the pressure regulating safety valve is inserted on the main seat of the body, and the pressure regulating safety valve corresponds to the high pressure buffer chamber and is used to adjust the air pressure of the high pressure buffer chamber.

Further, a safety mechanism is installed on the casing, and the safety mechanism includes a telescopic block, a safety spring, and a locking bead. The part of the block protruding into the interior of the casing is provided with a spring groove with a downward opening, the safety spring and the locking ball are inserted into the spring groove, and the locking ball is connected with the bottom of the spring groove through the safety spring. There is a pair of front and rear safety slots, the front safety slot corresponds to the unlocking position, and the rear safety slot corresponds to the locking position; when the safety mechanism is in the locked position, the locking bead abuts the rear safety slot, and the front safety slot corresponds to the locking position. The extension part just corresponds to the position of the telescopic block; when the safety mechanism is in the unlocking position, the locking bead abuts the front safety groove, and the front extension part just staggers from the telescopic block.

Further, the inner wall of the telescopic movable cavity is provided with a limit flange for defining the position of the partition piston, and the partition piston is located between the front end cover and the limit flange.

Further, a section near the operating end of the main sliding rod is provided with a scale mark for indicating the preload amount of the energy storage spring.

The beneficial effects of the present invention are: it is very convenient to excite the parts for modal testing. Compared with the traditional hammer, the present invention has convenient operation, good controllability, lower requirements for operators, and can be used at work. In the process, the "double-click" phenomenon can be effectively avoided, so that it has high work efficiency, and can perform precise point and directional excitation operations that are difficult for traditional mobile excitation equipment.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the use state of the present invention.

FIG. 3 is an enlarged view of part A in FIG. 1 .

FIG. 4 is a schematic diagram of the locked state of the stub.

Figure 5 is a schematic diagram of the installation relationship between the pressure relief hole and the pressure regulating slide valve.

FIG. 6 is a schematic diagram of the relative position of the pressure regulating slide valve and the pressure relief hole when the buffer system is at the maximum rigidity position.

Fig. 7 is a schematic diagram of the relative position of the pressure regulating spool valve and the pressure relief hole when the buffer system is at the minimum rigidity position.

FIG. 8 is a schematic diagram of an energy storage state of the present invention.

FIG. 9 is an enlarged view of part B in FIG. 8 .

In the figure, 1 hammer head, 2 acceleration sensor, 3 main sliding rod, 4 operating handle, 5 tooth surface slider, 5a tooth, 5b tooth slot, 6 energy storage spring, 7 main body seat, 7a telescopic movable cavity, 7b low pressure buffer chamber, 7c high pressure buffer chamber, 7d lock out hole, 7e pressure relief hole, 7f limit flange, 8 adjustment tailstock, 9 front end cover, 10 divider piston, 11 pressure regulating safety valve, 12 positioning ring, 13 Positioning Ring Cylinder, 14 Internal Spring, 15 Ventilation Channel, 16 Trigger, 16a Trigger, 16b Front Extension, 16c Rear Extension, 16d Trigger Pivot, 16e Moving Part, 16f Anti-Slope, 17 Screed, 17a Locking Hook, 18 sear pivot, 19 return spring, 20 receiver, 21 handle, 22 adjustment bolt, 23 safety mechanism, 23a telescopic block, 23b spring slot, 23c safety spring, 23d locking ball, 23e safety slot, 24 Pressure regulating slide valve, 24a pressure relief strip hole.

Detailed ways

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

As shown in Figure 1-9, a hand-held mechanical energy storage exciter includes the following parts:

A main body base 7 with a telescopic movable cavity 7a;

The main sliding rod 3 that runs through the main body base 7 and passes through the telescopic movable cavity 7a and has both ends exposed;

The tooth surface sliding block 5 which is coaxially combined with the main sliding rod 3 and is movable in the telescopic movable cavity 7a;

The acceleration sensing component installed on the impact end of the main slide bar 3;

a casing 20 with a built-in excitation mechanism combined with the lower side of the main body base 7;

The handle 21 connected to the outer wall of the receiver 20;

Energy storage system; buffer system; plane positioning system.

The above-mentioned acceleration sensing assembly includes a hammer head 1 and an acceleration sensor 2 connected to the analytical instrument. The hammer head 1, the acceleration sensor 2, and the impact end of the main slide bar 3 can be sequentially moved from front to back along the length direction of the main slide bar 3. Removably connected, the acceleration sensor 2 is threadedly connected to the impact end of the main slide rod 3, and the hammer head 1 is threadedly connected to the front end of the acceleration sensor 2, so that the hammer head 1 and the acceleration sensor 2 can be replaced in time according to the test requirements.

The outer surface of the tooth surface slider 5 is arranged with a number of teeth 5a evenly distributed along the axis direction of the tooth surface slider 5, and a tooth slot 5b is formed between any two adjacent teeth 5a. The excitation mechanism and the tooth surface slider 5 The plurality of tooth slots 5b are selectively locked and fitted.

The above-mentioned energy storage system includes an operation handle 4, an energy storage spring 6, and an adjustment tailstock 8. The operation handle 4 is installed on the operation end of the main slide bar 3, and the adjustment tailstock 8 is threadedly sleeved on one end of the adjacent operation handle 4 of the main body main seat 7 and The telescopic movable cavity 7a is sealed, the main sliding rod 3 is movably fitted to adjust the tailstock 8, the main body main seat 7 is installed with a front end cover 9 that seals the telescopic movable cavity 7a, and the energy storage spring 6 is sleeved on the main sliding rod 3, and the storage One end of the energy spring 6 is connected to the adjustment tailstock 8 , and the other end of the energy storage spring 6 abuts against the tooth surface slider 5 when energy is stored. During the working process, the energy storage system mainly assumes the function of accumulating the elastic potential energy of the system. By pulling the operating handle 4 back, the main sliding rod 3 can be driven to move backward and the energy storage spring 6 can be compressed, and can be tested according to actual test requirements. , by rotating and adjusting the tailstock 8 to control the front and rear positions of the tailstock 8 , and adjust the pre-pressure of the energy storage spring 6 , thereby adjusting the hammering energy of the main slide bar 3 . When the main slide bar 3 moves forward to the top, the energy storage spring 6 is completely disengaged from the tooth surface slider 5 of the main slide bar 3, which is easy to measure the single impact energy of the main slide bar 3, and facilitates the acceleration sensor 2 and the hammer. After hitting the workpiece to be tested, the striking head 1 can return to its position as quickly as possible to prevent double-clicking.

The above-mentioned buffer system includes a partition piston 10 built into the telescopic movable cavity 7a. The partition piston 10 is sleeved on the main sliding rod 3 and can move axially along the main sliding rod 3. The part before 5 is divided into a high pressure buffer chamber 7c and a low pressure buffer chamber 7b, and the high pressure buffer chamber 7c and the low pressure buffer chamber 7b are arranged in sequence from front to back.

The above-mentioned plane positioning system includes a positioning ring 12, a positioning ring cylinder 13, a built-in spring 14, and a ventilation channel 15. The cylinder barrel of the positioning ring cylinder 13 is integrated with the front part of the main body seat 7, and the piston rod of the positioning ring cylinder 13 faces the body. At the front of the main seat 7, the positioning ring 12 is installed on the piston rod of the positioning ring cylinder 13. The axis of the positioning ring 12 coincides with the axis of the main sliding rod 3. The positioning ring 12 is facing the acceleration sensing assembly and can accommodate acceleration sensing. The components move through, the inner spring 14 is placed in the rodless cavity of the cylinder barrel of the positioning ring cylinder 13, the two ends of the inner spring 14 are respectively connected to the piston of the positioning ring cylinder 13 and the inner wall of the cylinder barrel of the positioning ring cylinder 13, and one end of the ventilation channel 15 is connected to Through the low pressure buffer chamber 7b, the other end of the ventilation passage 15 is connected to the rod chamber of the cylinder barrel of the positioning ring cylinder 13. During the test, the positioning ring 12 is used to measure the relative position of the vibration exciter and the workpiece to be tested. When the main slide bar 3 moves forward to impact the workpiece to be tested, the tooth surface slider 5 pressurizes the low-pressure buffer chamber 7b, so that part of the The gas is filled into the rod cavity of the positioning ring cylinder 13 through the ventilation channel 15, and the piston rod of the positioning ring cylinder 13 drives the positioning ring 12 to retract, preventing the positioning ring 12 from interfering with the testing process.

The above-mentioned excitation mechanism includes a block iron 17, a block iron pivot 18, a return spring 19, and a trigger 16. The block iron 17 is rotatably connected to the casing 20 through the block iron pivot shaft 18, and the upper side of the locking end of the block iron 17 is provided with a lock. When facing and inserted into the locking hook 17a of one of the tooth slots 5b of the tooth surface slider 5, the main body main seat 7 is provided with a locking and abdicating hole 7d which communicates with the telescopic movable cavity 7a and the inner cavity of the casing 20. The position hole 7d faces the locking hook 17a, the lower side of the locking end of the sear 17 is elastically connected to the inner wall of the casing 20 through the return spring 19, the trigger 16 is rotated and arranged on the casing 20 and is used to drive the sear 17 to rotate, the trigger 16 An exposed trigger portion 16a is provided. When the trigger 16 is not pressed, the locking hook 17a of the sear 17 is inserted into one of the tooth slots 5b under the elastic force of the return spring 19, thereby locking the tooth surface slider 5. Since the main sliding rod 3 is provided with A number of tooth slots 5b are formed, which is equivalent to forming a number of gear positions, and the preload on the energy storage spring 6 can be adjusted by locking different gear positions.

The trigger 16 includes a movable member 16e and a trigger pivot 16d. The movable member 16e is rotatably arranged in the casing 20 through the trigger pivot 16d. The front extension part 16b and the rear extension part 16c are arranged in front and rear of the trigger pivot 16d and are on opposite sides of the trigger pivot 16d; Combined as a whole, the excitation mechanism includes an adjustment bolt 22 threaded on the casing 20 , the front end of the front extension 16b is provided with an interference slope 16f that interferes with the threaded portion of the adjustment bolt 22 , and the rear extension 16c Abuts against the locking hook on the iron block 17 . The opposite end of the portion 17a.

A safety mechanism 23 is installed on the above-mentioned casing 20. The safety mechanism 23 includes a telescopic block 23a, a safety spring 23c, and a locking ball 23d. The part of 23a that extends into the interior of the casing 20 is provided with a spring groove 23b with an opening downward. The safety spring 23c and the locking ball 23d are inserted into the spring groove 23b. The locking ball 23d is connected to the bottom of the spring groove 23b through the safety spring 23c. The box 20 is provided with a pair of front and rear safety slots 23e, the front safety slot 23e corresponds to the unlocked position, and the rear safety slot 23e corresponds to the locked position; when the safety mechanism 23 is in the locked position, the locking ball 23d abuts against the rear safety slot 23e , and the front extension 16b just corresponds to the position of the telescopic block 23a; when the safety mechanism 23 is in the unlocked position, the locking bead 23d abuts against the front safety groove 23e, and the front extension 16b just staggers from the telescopic block 23a. The safety mechanism 23 is equivalent to a safety mechanism. When the safety mechanism 23 is in the safety state, the front extension 16b of the trigger 16 cannot be rotated downward under the limiting action of the telescopic block 23a, thereby playing a safety role and ensuring safety.

The outer wall of the above-mentioned main body seat 7 is cylindrical, and the buffer system includes a pressure regulating slide valve 24. The pressure regulating slide valve 24 is a cylindrical structure with a C-shaped arc-shaped section and is sleeved on the outer wall of the main body main seat 7 in a rotatable manner around an axis. , the position of the low pressure buffer chamber 7b corresponds to the position of the pressure regulating slide valve 24, the main body main seat 7 is provided with a plurality of pressure relief holes 7e arranged in a straight row along its axial direction, and the pressure regulating slide valve 24 is provided with a spiral extension The pressure relief strip hole 24a, the width of the pressure relief strip hole 24a is adapted to the aperture of a single pressure relief hole 7e, the pressure relief strip hole 24a selectively communicates with one of the pressure relief holes 7e, the pressure relief hole 7e and the telescopic movable cavity 7a The low-pressure buffer chamber 7b is connected to each other and corresponds to a part of the pressure relief hole 7e during use.

During the test, the buffer system has a two-stage adjustable stiffness function: the first buffer stiffness is determined by the characteristics of the low pressure buffer chamber 7b, and the relative rotational position of the pressure regulating slide valve 24 and the main body seat 7 is adjusted so that the pressure relief The shaped hole 24a is selectively communicated with the pressure relief hole 7e, which can change the effective working volume in the low-pressure buffer chamber 7b, so as to complete the adjustment of the stiffness during the buffering process; when it is necessary to increase the first buffer stiffness, it can be clockwise (from the main 7) Turn the pressure regulating slide valve 24 so that the pressure relief strip hole 24a corresponds to the rearmost pressure relief hole 7e, and the pressure regulating slide valve 24 blocks all the front pressure relief holes 7e, so when the main slide bar 3 is in front of During the moving process, the pressure relief holes 7e blocked by the pressure regulating slide valve 24 can form a sealed state, thereby increasing the effective working volume in the low pressure buffer chamber 7b; when the first buffer stiffness needs to be reduced, the pressure regulating can be rotated counterclockwise The slide valve 24 makes the pressure relief strip hole 24a correspond to the frontmost pressure relief hole 7e, thereby reducing the effective working volume in the low pressure buffer chamber 7b.

The above buffer system includes a pressure regulating safety valve 11. The second buffer stiffness can be achieved by regulating the pressure of the high pressure buffer chamber 7c. The pressure regulating safety valve 11 is used to regulate the air pressure of the high pressure buffer chamber 7c. On the main body seat 7, the pressure regulating safety valve 11 corresponds to the high pressure buffer chamber 7c and is used to adjust the air pressure of the high pressure buffer chamber 7c. Among them, the adjustment operation of the buffer pressure of the low pressure buffer chamber 7b is completed by adjusting the position of the pressure regulating slide valve 24; the air pressure of the high pressure buffer chamber 7c is adjusted by the pressure regulating safety valve 11, in the case of overpressure inside the high pressure buffer chamber 7c , the excess gas can be quickly released through the pressure regulating safety valve 11 to ensure the safety of the use process. The function of the buffer system is to ensure that the hammer head 1 can flexibly buffer and return quickly after impacting the workpiece to be tested, so as to prevent double-clicking on the workpiece from affecting the test accuracy, and to ensure a high-pressure buffer chamber under extreme working conditions (such as high temperature environments, etc.). 7c security.

The inner wall of the telescopic movable cavity 7a is provided with a limit flange 7f for defining the position of the partition piston 10, and the partition piston 10 is located between the front end cover 9 and the limit flange 7f.

A scale mark for indicating the preload of the energy storage spring 6 is provided on a section of the main sliding rod 3 near the operating end. In order to accurately judge the preload of the energy storage spring 6 .

The specific workflow is as follows:

(S1) Preparation: According to the specific test object, the parameters such as the range of the acceleration sensor 2, the stiffness of the hammer head 1, the preload of the energy storage spring 6, the pressure of the low pressure buffer chamber 7b and the pressure of the high pressure buffer chamber 7c are selected respectively, and According to different personal usage habits, the angular position of the trigger portion 16a of the trigger 16 can be adjusted, the adjusting bolt 22 can be rotated, and the entire trigger 16 can be fine-tuned by using the adjusting bolt 22 to abut against the contact slope 16f of the front extension portion 16b. To adapt to the operating habits of different operators;

(S2) Energy storage link: According to the specific test requirements, select a more suitable preload pressure of the energy storage spring 6, and pull the operating handle 4 backward until the scale mark on the main slide bar 3 for indicating the preload of the spring reaches Set value; at this time, the sear 17 moves up under the push of the return spring 19 and abuts against one of the tooth grooves 5b of the tooth surface slider 5, thereby locking the main slide bar 3, and at the same time, after the main slide bar 3 During the moving process, the air enters the low pressure buffer chamber 7b through the pressure relief hole 7e;

(S3) The pressure adjustment link of the high pressure buffer chamber 7c and the low pressure buffer chamber 7b: rotate the pressure regulating slide valve 24 along the axial position to make the pressure relief strip hole 24a cooperate with the air relief hole 7e, thereby adjusting the effective volume of the low pressure buffer chamber 7b Adjust its buffer stiffness; at the same time, use an inflation tool to adjust the air pressure in the high pressure buffer chamber 7c through the pressure regulating safety valve 11;

(S4) Vibration excitation link: the user holds the handle 21 and pushes the safety mechanism 23 forward, so that the locking ball 23d is inserted into the front safety groove 23e, thereby releasing the locking of the trigger 16. Abut the positioning ring 12 against the surface of the workpiece to be tested (be careful not to push it hard against the workpiece to be tested), and pull the trigger 16. At this time, the trigger 16 drives the iron block 17 to move down against the elastic force of the return spring 19, so that the locking hook The main sliding rod 3 moves forward under the elastic force of the energy storage spring 6, and drives the acceleration sensor 2 and the hammer head 1 to impact the measured workpiece to complete the excitation;

(S5) Buffer link: when the main slide bar 3 moves forward, the low pressure buffer chamber 7b is compressed. With the forward movement of the main slide bar 3, the gas pressure in the low pressure buffer chamber 7b continues to rise until the pressure of the low pressure buffer chamber 7b and the high pressure buffer chamber The pressure of 7c is equal. At this time, the separating piston 10 moves forward, compressing the gas in the high-pressure buffer chamber 7c, so as to ensure that the main sliding rod 3 can softly perform a rapid rebound action after reaching the set displacement forward, completing a vibration excitation test process. ;

At the same time, the compressed gas in the low-pressure buffer chamber 7b is charged into the rod chamber of the positioning ring cylinder 13 through the ventilation channel 15, so as to drive the piston of the positioning ring cylinder 13 to overcome the elastic force of the built-in spring 14 and move backward, and drive the positioning ring 12 to leave the The surface of the workpiece is measured to prevent the positioning ring 12 from contacting the workpiece to be tested and affecting the test results.

If it is necessary to repeat the excitation experiment, just repeat the link S2 to the link S5.

The above are the preferred embodiments of the present invention, and those of ordinary skill in the art can also carry out various transformations or improvements on this basis. Without departing from the general concept of the present invention, these transformations or improvements should belong to the claimed protection of the present invention. within the range.

Claims (7)

1. A hand-held mechanical energy storage vibration exciter is characterized by comprising the following parts:

a main body seat (7) with a telescopic movable cavity (7 a);

a main slide bar (3) movably penetrates through the main body base (7) and penetrates through the telescopic movable cavity (7a), and two end parts of the main slide bar are exposed;

a tooth surface slide block (5) which is coaxially combined with the main slide bar (3) and moves in the telescopic movable cavity (7 a);

the acceleration sensing assembly is arranged at the impact end of the main sliding rod (3);

a casing (20) which is combined with the lower side of the main body seat (7) and is internally provided with an excitation mechanism;

a handle (21) connected with the outer wall of the casing (20);

an energy storage system; a buffer system; a planar positioning system;

the acceleration sensing assembly comprises a hammering head (1) and an acceleration sensor (2) connected with an analytical instrument, wherein the hammering head (1), the acceleration sensor (2) and the impact end of a main sliding rod (3) are sequentially detachably connected from front to back along the length direction of the main sliding rod (3);

a plurality of teeth (5a) uniformly distributed along the axial direction of the tooth surface sliding block (5) are arranged on the outer surface of the tooth surface sliding block (5), a tooth socket (5b) is formed between any two adjacent teeth (5a), and the excitation mechanism is selectively locked and matched with the tooth sockets (5b) of the tooth surface sliding block (5);

the energy storage system comprises an operating handle (4), an energy storage spring (6) and an adjusting tailstock (8), wherein the operating handle (4) is installed at the operating end of a main sliding rod (3), the adjusting tailstock (8) is in threaded fit with one end, facing the operating handle (4), of a main body seat (7) and seals a telescopic movable cavity (7a), the adjusting tailstock (8) is movably arranged on the main sliding rod (3) in a penetrating mode, a front end cover (9) for sealing the telescopic movable cavity (7a) is installed on the main body seat (7), the energy storage spring (6) is in threaded fit with the main sliding rod (3), one end of the energy storage spring (6) is connected with the adjusting tailstock (8), and the other end of the energy storage spring (6) abuts against a tooth surface sliding block (5) during energy storage;

the buffer system comprises a separation piston (10) arranged in a telescopic movable cavity (7a), the separation piston (10) is sleeved on the main slide bar (3) and can move axially along the main slide bar (3), the separation piston (10) divides the front part of the tooth surface slide block (5) in the telescopic movable cavity (7a) into a high-pressure buffer cavity (7c) and a low-pressure buffer cavity (7b), and the high-pressure buffer cavity (7c) and the low-pressure buffer cavity (7b) are sequentially arranged from front to back;

the plane positioning system comprises a positioning ring (12), a positioning ring cylinder (13), a built-in spring (14) and a ventilation channel (15), wherein a cylinder barrel of the positioning ring cylinder (13) is combined with the front part of a main body seat (7) into a whole, a piston rod of the positioning ring cylinder (13) faces the front part of the main body seat (7), the positioning ring (12) is installed on the piston rod of the positioning ring cylinder (13), the axis of the positioning ring (12) is superposed with the axis of a main sliding rod (3), the positioning ring (12) is over against an acceleration sensing assembly and can allow the acceleration sensing assembly to movably pass through, the built-in spring (14) is arranged in a rodless cavity of the cylinder barrel of the positioning ring cylinder (13), two ends of the built-in spring (14) are respectively connected with a piston of the positioning ring cylinder (13) and the inner wall of the cylinder barrel of the positioning ring cylinder (13), one end of the, the other end of the ventilation channel (15) is communicated with a cylinder barrel with a rod cavity of the positioning ring cylinder (13);

the excitation mechanism comprises a choke iron (17), a choke iron pivot (18), a return spring (19) and a trigger (16), the sear (17) is rotatably connected in the casing (20) through a sear pivot (18), a locking hook part (17a) which is opposite to and inserted into one tooth groove (5b) of the tooth surface slide block (5) during locking is arranged on the upper side of the locking end of the sear (17), the main body seat (7) is provided with a locking abdicating hole (7d) communicated with the telescopic movable cavity (7a) and the inner cavity of the casing (20), the locking abdication hole (7d) is opposite to the locking hook part (17a), the lower side of the locking end of the iron inhibitor (17) is elastically connected with the inner wall of the casing (20) through a return spring (19), the trigger (16) is rotatably arranged on the casing (20) and is used for driving the sear (17) to rotate, and the trigger (16) is provided with an exposed trigger part (16 a).

2. The hand-held mechanical energy storage vibration exciter according to claim 1, wherein: the outer wall of the main body seat (7) is cylindrical, the buffer system comprises a pressure regulating slide valve (24), the pressure regulating slide valve (24) is a cylindrical structure with a C-shaped arc section and is sleeved on the outer wall of the main body base (7) in a rotating way around a shaft, the position of the low-pressure buffer cavity (7b) corresponds to the position of the pressure regulating slide valve (24), a plurality of pressure relief holes (7e) which are arranged in a straight line along the axial direction of the main body seat (7) are arranged on the main body seat (7), the pressure regulating slide valve (24) is provided with a pressure relief strip-shaped hole (24a) which extends spirally, the width of the pressure relief strip-shaped hole (24a) is matched with the aperture of a single pressure relief hole (7e), the pressure relief strip-shaped hole (24a) is selectively communicated with one pressure relief hole (7e), the pressure relief hole (7e) is communicated with the telescopic movable cavity (7a) and corresponds to part of the pressure relief hole (7e) of the low-pressure buffer cavity (7b) when the pressure relief device is used.

3. The hand-held mechanical energy storage vibration exciter according to claim 1, wherein: the trigger (16) comprises a movable piece (16e) and a trigger pivot (16d), the movable piece (16e) is rotatably arranged in the casing (20) through the trigger pivot (16d), the movable piece (16e) comprises a front extension portion (16b) and a rear extension portion (16c) which are located in the casing (20), the front extension portion (16b) and the rear extension portion (16c) are arranged in the front and the rear direction with the trigger pivot (16d) as the standard and are located on two opposite sides of the trigger pivot (16d), the trigger portion (16a) is arranged on the movable piece (16e) and is combined with the front extension portion (16b) and the rear extension portion (16c) into a whole, the excitation mechanism comprises an adjusting bolt (22) which is in threaded connection with the casing (20), the front end of the front extension portion (16b) is provided with an inclined surface (16f) which abuts against a threaded portion of the adjusting bolt (22), and the rear extension portion (16c) abuts against one end, opposite to the locking hook portion (17a), of the iron blocking portion (17.

4. The hand-held mechanical energy storage vibration exciter according to claim 1, wherein: the buffer system comprises a pressure regulating safety valve (11), the pressure regulating safety valve (11) is inserted on the main body seat (7), and the pressure regulating safety valve (11) corresponds to the high-pressure buffer cavity (7c) and is used for regulating the air pressure of the high-pressure buffer cavity (7 c).

5. A hand-held mechanical energy storage vibration exciter according to claim 3, wherein: the safety mechanism (23) is mounted on the casing (20), the safety mechanism (23) comprises a telescopic block (23a), a safety spring (23c) and a locking bead (23d), the telescopic block (23a) penetrates through the casing (20) in a front-back sliding mode, the rear end of the telescopic block extends into the casing (20), a spring groove (23b) with a downward opening is formed in the part, extending into the casing (20), of the telescopic block (23a), the safety spring (23c) and the locking bead (23d) are inserted into the spring groove (23b), the locking bead (23d) is connected with the bottom of the spring groove (23b) through the safety spring (23c), a pair of safety grooves (23e) which are arranged in the front-back mode is arranged in the casing (20), the safety groove (23e) close to the front mode corresponds to an unlocking position, and the safety groove (23e) close to the rear mode corresponds to a locking position; when the safety mechanism (23) is in a locking position, the locking bead (23d) abuts against the rear safety groove (23e), and the front extension part (16b) just corresponds to the position of the telescopic block (23 a); when the safety mechanism (23) is in an unlocking position, the locking bead (23d) abuts against the front safety groove (23e), and the front extension part (16b) is just staggered with the telescopic block (23 a).

6. The hand-held mechanical energy storage vibration exciter according to claim 1, wherein: the inner wall of the telescopic movable cavity (7a) is provided with a circle of limiting flanges (7f) used for limiting the positions of the separating pistons (10), and the separating pistons (10) are located between the front end cover (9) and the limiting flanges (7 f).

7. The hand-held mechanical energy storage vibration exciter according to claim 1, wherein: one section of the main sliding rod (3) near the operating end is provided with a scale mark for indicating the prepressing amount of the energy storage spring (6).

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