CN220542312U - Force measuring device - Google Patents
Force measuring device Download PDFInfo
- Publication number
- CN220542312U CN220542312U CN202322254425.2U CN202322254425U CN220542312U CN 220542312 U CN220542312 U CN 220542312U CN 202322254425 U CN202322254425 U CN 202322254425U CN 220542312 U CN220542312 U CN 220542312U
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- force
- guide shaft
- force sensor
- measuring device
- supporting seat
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- 238000001514 detection method Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a force measuring device, which relates to the technical field of detection equipment, wherein a force sensor and a guide shaft are coaxially arranged, the force sensor and the guide shaft are connected through an elastic connecting piece and transmit acting force, and the force sensor is arranged on a supporting seat; the axial guide bearing is arranged between the guide shaft and the supporting seat to reduce friction, the guide shaft can extend out of the supporting seat, the force of the key is received when the guide shaft presses the key, the force is transmitted to the force sensor through the elastic connecting piece, the force sensor detects the force of the key, and the friction force of the movement of the guide shaft is reduced through the axial guide bearing; the utility model adopts the elastic connecting piece to indirectly connect the force sensor and the guide shaft, thereby avoiding damage of the force sensor due to exceeding the stroke.
Description
Technical Field
The utility model relates to the technical field of detection equipment, in particular to a force measuring device.
Background
The equipment such as a computer, a POS machine, a calculator and the like is provided with a physical key, the key is required to be detected, so that whether the service life of the detected key meets the requirement is judged, in order to ensure the detection precision, the key is required to be repeatedly pressed by applying acting force with a specific size to the key, and the service life of the key is measured by the pressing times.
The force measuring equipment realizes the direction through the guiding axle, and the guiding axle is direct to be connected with force transducer, and connecting screw thread is M3, degree of depth 2.5mm, in order to protect damage force transducer, adds a protective sheath in the outer end of guiding axle, leads to axle and protective sheath to have frictional force, influences final output value.
Since the guide shaft is directly connected to the load cell, if the underlying heights differ, this can result in damage to the load cell beyond the stroke.
It is a technical problem that needs to be solved at present that how to reduce friction force to influence output accuracy and avoid damage of force sensor exceeding stroke for those skilled in the art.
Disclosure of Invention
The utility model provides a force measuring device, which reduces the influence of friction on output precision and avoids damage of a force sensor beyond a stroke, and the specific scheme is as follows:
a force measuring device comprises a force sensor, an elastic connecting piece, a guide shaft, an axial guide bearing and a support seat;
the force sensor is arranged on the supporting seat, the force sensor and the guide shaft are coaxially arranged, and the force sensor and the guide shaft are connected through the elastic connecting piece and transmit acting force;
the axial guide bearing is arranged between the guide shaft and the supporting seat to reduce friction;
the guide shaft can extend out of the supporting seat, and when one end of the guide shaft contacts with the key, acting force is transmitted to the force sensor through the elastic connecting piece.
Optionally, the force sensor is provided with a first connecting block, the guide shaft is provided with a second connecting block, and the first connecting block and the second connecting block are respectively connected to two ends of the elastic connecting piece.
Optionally, the elastic connecting piece is a coil spring, and two ends of the coil spring are respectively connected with the first connecting block and the second connecting block in an interference mode.
Optionally, the second connecting block is provided with a limit stop along the circumferential protrusion, the supporting seat is provided with a limit step, and the limit step is used for limiting the axial limit position of the limit stop.
Optionally, a shaft sleeve is installed between the force sensor and the supporting seat, and the shaft sleeve and the axial guide bearing serve as two limiting steps to respectively limit the axial limiting positions of the two ends of the limiting stop block.
Optionally, the sleeve and the axial guide bearing are in butt joint with each other;
the shaft sleeve is provided with a stepped groove, and the second connecting block can extend into the stepped groove.
Optionally, the shaft sleeve and the axial guide bearing are respectively installed on the supporting seat through pressing blocks, and the pressing blocks are connected with the supporting seat through threads.
Optionally, the supporting seat is provided with a clamp connecting plate, the clamp connecting plate is fixedly installed on the clamp, and the supporting seat is driven to move through the clamp.
The utility model provides a force measuring device, wherein a force sensor and a guide shaft are coaxially arranged, the force sensor and the guide shaft are connected through an elastic connecting piece and transmit acting force, and the force sensor is arranged on a supporting seat; the axial guide bearing is arranged between the guide shaft and the supporting seat to reduce friction, the guide shaft can extend out of the supporting seat, the force of the key is received when the guide shaft presses the key, the force is transmitted to the force sensor through the elastic connecting piece, the force sensor detects the force of the key, and the friction force of the movement of the guide shaft is reduced through the axial guide bearing; the utility model adopts the elastic connecting piece to indirectly connect the force sensor and the guide shaft, thereby avoiding damage of the force sensor due to exceeding the stroke.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic front view of a force measuring device according to the present utility model;
fig. 2 is a side view in cross section of the force measuring device provided by the utility model.
The drawings include:
the force sensor 1, the first connecting block 11, the elastic connecting piece 2, the guide shaft 3, the second connecting block 31, the limit stop 311, the axial guide bearing 4, the supporting seat 5, the clamp connecting plate 51, the limit step 52, the shaft sleeve 6 and the pressing block 7.
Detailed Description
The core of the utility model is to provide a force measuring device, which reduces the influence of friction on output precision and avoids damage of a force sensor beyond a stroke.
In order to make the technical solution of the present utility model better understood by a person skilled in the art, the force measuring device of the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the present utility model provides a force measuring device, which includes a force sensor 1, an elastic connecting piece 2, a guide shaft 3, an axial guide bearing 4, a support seat 5, and other structures. The supporting seat 5 plays a role of mounting and supporting, other components are mounted on the supporting seat 5, the specific structure of the supporting seat 5 is not limited herein, and the supporting seat 5 and the other components are required to be matched with each other.
Referring to FIG. 2, a cross-sectional view corresponding to the direction A-A in FIG. 1 is shown; the force sensor 1 is mounted on the support base 5, and the force sensor 1 and the guide shaft 3 are coaxially arranged, that is, the force sensor 1 and the guide shaft 3 are vertically opposite to each other in the direction shown in fig. 2, and when the guide shaft 3 moves upward, the force sensor 1 is approached, so that the acting force can be transmitted to the force sensor 1. The force sensor 1 and the guide shaft 3 are connected through the elastic connecting piece 2 and transmit acting force, namely the force sensor 1 and the guide shaft 3 are not directly connected and contacted, the elastic connecting piece 2 is arranged between the force sensor 1 and the guide shaft 3, and the elastic connecting piece 2 can generate elastic deformation; referring to fig. 2, when the guide shaft 3 moves upward, the guide shaft 3 applies pressure to the elastic connection member 2, so that the elastic connection member 2 is deformed by compression to generate elastic force, and the elastic connection member 2 further applies pressure to the force sensor 1 upward, so that the force sensor 1 detects the force applied to the key by the end of the guide shaft 3. The guide shaft 3 indirectly applies a force to the force sensor 1.
The axial guide bearing 4 is arranged between the guide shaft 3 and the supporting seat 5 to reduce friction, the axial guide bearing 4 is sleeved outside the guide shaft 3, when the guide shaft 3 moves, direct contact with the supporting seat 5 can be avoided, the axial guide bearing 4 reduces friction between the guide shaft 3 and the supporting seat 5, friction force born by the guide shaft 3 is reduced, and the influence of friction force on detection precision is removed.
The guiding shaft 3 can extend from the supporting seat 5, when one end of the guiding shaft 3 contacts with the key, acting force is transmitted to the force sensor 1 through the elastic connecting piece 2, and when the whole supporting seat 5 is moved downwards by an external driving structure, the lower end of the guiding shaft 3 contacts with the key arranged below, and the key is pressed downwards, as shown in fig. 2. Correspondingly, the key applies upward acting force to the guide shaft 3, so that the guide shaft 3 retracts into the supporting seat 5, the guide shaft 3 moves upwards relative to the supporting seat 5, the upper end of the guide shaft 3 applies acting force to the elastic connecting piece 2, the elastic connecting piece 2 is compressed, the elastic connecting piece 2 further applies acting force to the force sensor 1, the magnitude of acting force transmitted by the elastic connecting piece 2 is related to the compression degree of the elastic connecting piece 2, the larger the compression amount is, the larger the acting force transmitted is, the magnitudes of acting forces at two ends of the elastic connecting piece 2 are equal, and the acting force detected by the force sensor 1 is equal to the acting force between the guide shaft 3 and the key.
The force measuring device adopts the elastic connecting piece 2 to indirectly connect the force sensor 1 and the guide shaft 3, so that the force sensor 1 is prevented from exceeding the stroke damage; the elastic connecting piece 2 is used for transmitting acting force to the force sensor 1, so that the force sensor 1 detects the stress of a key, and the friction force of the motion of the guide shaft 3 is reduced through the axial guide bearing 4, so that the acting force detection is more accurate. According to the utility model, acting force is transmitted through the elastic connecting piece 2, when keys with different specifications are tested, only the elastic connecting piece 2 with different specifications is replaced, and the replacement of variants is convenient.
On the basis of the above scheme, the force sensor 1 of the utility model is provided with the first connecting block 11, and the first connecting block 11 is fixed on the force sensor 1. The guide shaft 3 is provided with a second connection block 31, and the second connection block 31 is fixed to the guide shaft 3. The first connecting block 11 and the second connecting block 31 are respectively connected to two ends of the elastic connecting piece 2, and the first connecting block 11 and the second connecting block 31 are of a connecting structure and can be respectively connected to the elastic connecting piece 2.
Specifically, the elastic connecting piece 2 provided by the utility model is a coil spring, two ends of the coil spring are respectively connected with the first connecting block 11 and the second connecting block 31 in an interference manner, bosses are respectively arranged on the first connecting block 11 and the second connecting block 31, the coil spring is respectively clamped and mounted on the bosses in an interference fit manner, and the assembly of the elastic connecting piece 2 is realized through the mutual cooperation of the first connecting block 11 and the second connecting block 31.
As shown in fig. 2, the second connecting block 31 is provided with a limit stop 311 protruding in the circumferential direction, the limit stop 311 may be provided with a complete circumference, or may be provided with two or more structures separated from each other, and the outside diameter of the limit stop 311 is larger than the diameters of other parts of the second connecting block 31. The supporting seat 5 is provided with a limit step 52, and the limit step 52 is used for limiting the axial limit position of the limit stop 311. The two limiting steps 52 are provided to respectively limit the limit position of the upward movement and the limit position of the current movement of the second connection block 31, and when the limiting stopper 311 contacts the limiting step 52, the second connection block 31 cannot continue to move, so that the second connection block 31 moves between the two limiting steps 52.
Referring to fig. 2, a sleeve 6 is installed between the force sensor 1 and the support base 5, the sleeve 6 is sleeved on the lower portion of the force sensor 1, and the sleeve 6 only needs to cover a part of the force sensor 1, so that the force sensor 1 may not be completely surrounded. The sleeve 6 and the axial guide bearing 4 serve as two limit steps 52, respectively defining both end axial limit positions of the limit stop 311. In fig. 2, the shaft sleeve 6 serves as an upper limit step 52, and the outer ring of the axial guide bearing 4 serves as a lower limit step 52. The displacement limit positions of both ends of the second connection block 31 are defined by the outer ring of the axial guide bearing 4 and the sleeve 6, respectively.
Besides limiting the range of movement of the second connection block 31 by means of the sleeve 6 and the outer ring of the axial guide bearing 4, it is also possible to provide corresponding limit structures directly on the inner wall of the support seat 5, these specific arrangements being intended to be included in the scope of protection of the present utility model.
Referring to fig. 2, the sleeve 6 and the axial guide bearing 4 of the present utility model are abutted against each other, and when the sleeve 6 is mounted to the support base 5, the end of the sleeve 6 contacts the outer ring of the axial guide bearing 4. The shaft sleeve 6 is provided with a stepped groove, the second connecting block 31 can extend into the stepped groove, the stepped groove is a hole groove with two sections of different diameters, the diameter change parts of the two sections of different diameters form a step, and limit stop 311 can be in limit fit.
As shown in fig. 2, the shaft sleeve 6 and the axial guide bearing 4 are respectively mounted on the supporting seat 5 through the pressing block 7, and the pressing block 7 is in threaded connection with the supporting seat 5. Each pressing block 7 is screwed on the supporting seat 5 through a plurality of bolts, so that the shaft sleeve 6 and the axial guide bearing 4 can be limited, and the shaft sleeve 6 and the axial guide bearing 4 are prevented from falling off.
The supporting seat 5 is provided with the clamp connecting plate 51, the clamp connecting plate 51 is fixedly arranged on the clamp, the clamp connecting plate 51 is fixed on the clamp through bolts, the supporting seat 5 is driven to move through the clamp, the whole supporting seat 5 is driven by the clamp to repeatedly move up and down continuously when the test is carried out, and when the supporting seat 5 moves downwards, the end part of the guide shaft 3 contacts a tested key.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The force measuring device is characterized by comprising a force sensor (1), an elastic connecting piece (2), a guide shaft (3), an axial guide bearing (4) and a supporting seat (5);
the force sensor (1) is arranged on the supporting seat (5), the force sensor (1) and the guide shaft (3) are coaxially arranged, and the force sensor (1) and the guide shaft (3) are connected through the elastic connecting piece (2) and transmit acting force;
the axial guide bearing (4) is arranged between the guide shaft (3) and the supporting seat (5) to reduce friction;
the guide shaft (3) can extend out of the supporting seat (5), and when one end of the guide shaft (3) contacts with a key, acting force is transmitted to the force sensor (1) through the elastic connecting piece (2).
2. Force measuring device according to claim 1, characterized in that the force sensor (1) is provided with a first connection block (11), the guide shaft (3) is provided with a second connection block (31), and the first connection block (11) and the second connection block (31) are connected to the two ends of the elastic connection piece (2), respectively.
3. Force measuring device according to claim 2, characterized in that the elastic connection piece (2) is a spiral spring, both ends of which are connected to the first connection block (11) and the second connection block (31) with interference, respectively.
4. Force measuring device according to claim 2, characterized in that the second connection block (31) is provided with a limit stop (311) protruding in the circumferential direction, the support seat (5) is provided with a limit step (52), and the limit step (52) is used for limiting the axial limit position of the limit stop (311).
5. Force measuring device according to claim 4, characterized in that a bushing (6) is mounted between the force sensor (1) and the support (5), the bushing (6) and the axial guide bearing (4) serving as two limit steps (52) defining the two end axial limit positions of the limit stop (311), respectively.
6. Force measuring device according to claim 5, characterized in that the bushing (6) and the axial guide bearing (4) are in abutment with each other;
the shaft sleeve (6) is provided with a stepped groove, and the second connecting block (31) can extend into the stepped groove.
7. Force measuring device according to claim 5, characterized in that the shaft sleeve (6) and the axial guide bearing (4) are mounted to the support base (5) by means of a press block (7), respectively, the press block (7) and the support base (5) being connected by means of a screw thread.
8. Force measuring device according to claim 1, characterized in that the support (5) is provided with a clamp connection plate (51), the clamp connection plate (51) being fixedly mounted to a clamp by means of which the support (5) is driven to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322254425.2U CN220542312U (en) | 2023-08-21 | 2023-08-21 | Force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322254425.2U CN220542312U (en) | 2023-08-21 | 2023-08-21 | Force measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220542312U true CN220542312U (en) | 2024-02-27 |
Family
ID=89964772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322254425.2U Active CN220542312U (en) | 2023-08-21 | 2023-08-21 | Force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220542312U (en) |
-
2023
- 2023-08-21 CN CN202322254425.2U patent/CN220542312U/en active Active
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