CN220613726U - Clamp - Google Patents

Abstract

The utility model provides a clamp for testing battery expansion force, and belongs to the technical field of battery testing equipment. The fixture comprises: the first clamping plate, the second clamping plate and the third clamping plate are arranged between every two of the clamping plates at intervals, and the second clamping plate and the third clamping plate are used for clamping the battery; the sensor is arranged between the first clamping plate and the second clamping plate; the device comprises at least two upright posts, wherein one end of each upright post is fixedly connected with a first clamping plate, the other end of each upright post passes through a second clamping plate and a third clamping plate and at least partially extends out of the third clamping plate, a first thread is arranged at the other end of each upright post, and scale marks are arranged on each upright post; and at least two groups of nut components, wherein the nut components comprise a first adjusting nut and a second adjusting nut, the first adjusting nut is detachably connected with the first screw thread of the upright post, the outer wall of the first adjusting nut is provided with a second screw thread, the second adjusting nut is connected with the second screw thread, and the second adjusting nut is stopped at one end of the first adjusting nut, which is close to the third clamping plate.

Description

Clamp

Technical Field

The utility model relates to the technical field of battery testing equipment, in particular to a clamp.

Background

In order to study the cycle performance, expansion force, deformation condition and the like of the battery under different working conditions, the expansion test of the battery is required.

In the prior art, three steel clamps are typically used to perform expansion tests on the battery. The three steel clamps comprise a bottom plate, a middle plate and a top plate which are arranged at intervals, and the sensor is fixedly connected between the bottom plate and the middle plate. When testing, set up the battery between medium plate and roof, pass roof, medium plate with a plurality of bolts again and connect in the bottom plate to connect the battery between medium plate and roof, carry out the inflation test to the battery.

In the existing three-piece steel clamp, after a plurality of bolts penetrate through a top plate and a middle plate to be connected with a bottom plate, screws connected with the bolts are required to be screwed down, so that the top plate and the middle plate clamp a battery. However, in the process of tightening the plurality of screws, the tightening degree of the plurality of screws is inconsistent, so that the clamp is uneven, and the battery is unbalanced under pressure, thereby affecting the accuracy of the test result.

Disclosure of Invention

The utility model provides a clamp which is used for testing the expansion force of a battery and solves or at least partially solves the problems that in the prior art, in the process of tightening a plurality of screws, the tightening degree of the plurality of screws is inconsistent, the clamp is uneven, the battery is stressed and unbalanced, and the accuracy of a test result is affected.

In order to solve the technical problems, the utility model is realized as follows:

the utility model provides a clamp, comprising: the battery clamping device comprises a first clamping plate, a second clamping plate and a third clamping plate, wherein the first clamping plate, the second clamping plate and the third clamping plate are arranged at intervals, and the second clamping plate and the third clamping plate are used for clamping a battery; a sensor disposed between the first clamp plate and the second clamp plate; the device comprises at least two upright posts, wherein one end of each upright post is fixedly connected with the first clamping plate, the other end of each upright post penetrates through the second clamping plate and the third clamping plate and at least partially stretches out of the third clamping plate, a first thread is arranged at the other end of each upright post, and scale marks are arranged on each upright post; and at least two groups of nut components, wherein the nut components comprise a first adjusting nut and a second adjusting nut, the first adjusting nut is detachably connected with the first screw thread of the upright post, a second screw thread is arranged on the outer wall of the first adjusting nut, the second adjusting nut is connected with the second screw thread, and the second adjusting nut is stopped at one end, close to the third clamping plate, of the first adjusting nut, and the screw pitch of the second screw thread is smaller than that of the first screw thread.

Optionally, a step structure is arranged on the first adjusting nut, a stop part is arranged at one end of the first adjusting nut, which is close to the third clamping plate, and the second thread is arranged between the step structure and the stop part; the second adjusting nut is stopped at the stopping part and the step structure.

Optionally, the second adjusting nut includes: the adjusting clamp ring is provided with a through hole, and the through hole extends to the inner wall along the outer wall of the adjusting clamp ring; the second adjusting nut body is sequentially connected with the adjusting clamping ring and the second adjusting nut body through the second threads, and the second adjusting nut body is elastically clamped with the adjusting clamping ring; the clamping piece stretches into the through hole and is elastically clamped to the outer wall of the first adjusting nut.

Optionally, the clamping member includes: the clamping pin extends into the through hole; the first spring is sleeved on the clamping pin, one end of the first spring is abutted to one end, away from the first adjusting nut, of the clamping pin, and the other end of the first spring is abutted to the outer wall of the first adjusting nut.

Optionally, the second adjusting nut body is close to the one end of adjusting the snap ring is provided with first recess, the one end that adjusts the snap ring and is close to the second adjusting nut body is provided with first arch, wherein, first protruding elasticity joint in first recess.

Optionally, the fixture further comprises: a push rod and a second spring; the nut assembly is provided with a second groove at one end close to the third clamping plate, the push rod comprises an annular connecting piece and a connecting rod connected to the end part of the annular connecting piece, the annular connecting piece is sleeved on the upright post and is abutted to the third clamping plate, and the connecting rod is clamped in the second groove; the second spring is sleeved on the connecting rod, one end of the second spring is abutted to the annular connecting piece, and the other end of the second spring stretches into the second groove and is abutted to the bottom wall of the second groove.

Optionally, the connecting rods include a plurality of connecting rods, and the plurality of connecting rods are arranged at intervals along the circumferential direction of the annular connecting piece and are connected to one end of the annular connecting piece; the springs also comprise a plurality of springs, and each spring is arranged corresponding to one connecting rod.

Optionally, the stand is annular structure, and has transparent chamber wall, be provided with on the inner wall of stand along the axial extension's of stand scale mark.

Optionally, the fixture further comprises: the scale drum, wherein, the outer wall of scale drum is provided with the scale mark, scale drum at least partly stretches into in the stand, and the joint in the inner wall of stand.

Optionally, the scale mark includes first scale mark and second scale mark, wherein, first scale mark with the second scale mark is followed the axial interval of scale drum set up in the outer wall of scale drum, in order to pass through first scale mark coarse tuning first adjusting nut, and pass through the second scale mark fine tuning second adjusting nut.

The utility model provides a clamp, which comprises a first clamping plate, a second clamping plate and a third clamping plate, wherein the first clamping plate, the second clamping plate and the third clamping plate are arranged at intervals, and the second clamping plate and the third clamping plate are used for clamping a battery; a sensor disposed between the first clamp plate and the second clamp plate; the device comprises at least two upright posts, wherein one end of each upright post is fixedly connected with the first clamping plate, the other end of each upright post penetrates through the second clamping plate and the third clamping plate and at least partially stretches out of the third clamping plate, a first thread is arranged at the other end of each upright post, and scale marks are arranged on each upright post; and at least two groups of nut components, wherein the nut components comprise a first adjusting nut and a second adjusting nut, the first adjusting nut is detachably connected with the first screw thread of the upright post, a second screw thread is arranged on the outer wall of the first adjusting nut, the second adjusting nut is connected with the second screw thread, and the second adjusting nut is stopped at one end, close to the third clamping plate, of the first adjusting nut, the nut components are coarse-adjusted through the first adjusting nut, and the nut components are fine-adjusted through the second adjusting nut. In the utility model, scale marks are arranged on the upright post, the first adjusting nut is detachably connected with a first thread arranged on the upright post, a second thread is arranged on the outer wall of the first adjusting nut, the second adjusting nut is connected with the second thread, and the second adjusting nut is stopped at one end of the first adjusting nut, which is close to the third clamping plate. Therefore, the first adjusting nut can be adjusted to coarse tune the nut component, and the second adjusting nut can be adjusted to fine tune the nut component, so that the tightening degrees of at least two groups of nut components are the same or similar. The battery is balanced under pressure, and the accuracy of the test result is improved. The problem that the accuracy of a test result is affected due to uneven pressure of a battery caused by uneven included angles is avoided.

Drawings

FIG. 1 is a schematic view showing the structure of a jig according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a nut assembly according to an embodiment of the present utility model;

FIG. 3 shows an exploded view of the nut assembly according to the embodiment of the present utility model;

FIG. 4 is a schematic view of another construction of the nut assembly according to the embodiment of the utility model;

FIG. 5 illustrates another exploded view of the nut assembly of the present utility model;

fig. 6 shows a schematic structural view of the first adjusting nut according to the embodiment of the present utility model.

Reference numerals:

10: a first clamping plate;

20: a second clamping plate;

30: a third clamping plate;

40: a sensor;

50: a column;

60: a nut assembly; 61: a first adjustment nut; 611: a step structure; 612: a stop portion; 62: a second adjustment nut; 621: adjusting the clamping ring; 622: a second adjustment nut body; 623: a clamping piece; 6231: a clamping pin; 6232: a first spring;

70: a push rod; 71: a second spring; 72: an annular connecting member; 73: a connecting rod;

80: a scale drum; 81: a first scale line; 82: a second graduation mark;

90: and a battery.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the utility model, are intended to be within the scope of the utility model.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present utility model. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to FIG. 1, a schematic diagram of a clamp according to an embodiment of the present utility model is shown; referring to fig. 2, a schematic structural view of a nut assembly according to an embodiment of the present utility model is shown; referring to fig. 3, an exploded view of a nut assembly in accordance with an embodiment of the present utility model is shown; referring to fig. 4, another structural schematic diagram of the nut assembly in accordance with the embodiments of the present utility model is shown; referring to fig. 5, another exploded view of a nut assembly in accordance with an embodiment of the utility model is shown; referring to fig. 6, a schematic structural view of a first adjusting nut according to an embodiment of the present utility model is shown.

As shown in fig. 1 to 6, the embodiment of the present utility model provides a clamp for battery expansion force test, which includes a first clamping plate 10, a second clamping plate 20 and a third clamping plate 30 disposed to be spaced apart from each other, the second clamping plate 20 and the third clamping plate 30 being used for clamping a battery; a sensor 40, the sensor 40 being disposed between the first clamping plate 10 and the second clamping plate 20; at least two upright posts 50, wherein one end of each upright post 50 is fixedly connected to the first clamping plate 10, the other end of each upright post 50 passes through the second clamping plate 20 and the third clamping plate 30 and at least partially extends out of the third clamping plate 30, a first thread is arranged at the other end of each upright post 50, and scale marks are arranged on each upright post 50; and at least two sets of nut assemblies 60, the nut assemblies 60 including a first adjusting nut 61 and a second adjusting nut 62, the first adjusting nut 61 being detachably connected to a first screw thread of the upright post 50, the outer wall of the first adjusting nut 61 being provided with a second screw thread, the second adjusting nut 62 being connected to the second screw thread and stopping at one end of the first adjusting nut 61 near the third clamping plate 30, the pitch of the second screw thread being smaller than that of the first screw thread to coarse tune the nut assemblies 60 through the first adjusting nut 61, and fine tune the nut assemblies 60 through the second adjusting nut 62.

As shown in fig. 1 to 6, the embodiment of the utility model provides a clamp, and the clamp test provided by the embodiment of the utility model is adopted to perform expansion test on the battery, so that the compression of the battery is more balanced, and the accuracy of the test result is higher.

The clamp provided by the embodiment of the utility model comprises a first clamping plate 10, a second clamping plate 20 and a third clamping plate 30 which are sequentially arranged at intervals, wherein the first clamping plate 10, the second clamping plate 20 and the third clamping plate 30 are all in a plane plate-shaped structure. The sensor 40 is disposed between the first clamping plate 10 and the second clamping plate 20, and the sensor 40 is fixed by the first clamping plate 10 and the second clamping plate 20. When the battery is tested, the battery is set between the second clamping plate 20 and the third clamping plate 30, clamped by the second clamping plate 20 and the third clamping plate 20, and expansion test is performed on the battery by the sensor 40.

The fixture provided by the embodiment of the utility model further comprises at least two upright posts 50 and at least two groups of nut assemblies 60, wherein each group of nut assemblies 60 comprises a first adjusting nut 61 and a second adjusting nut 62, and each group of nut assemblies 60 and one upright post 50 are correspondingly arranged. One end of the upright 50 is fixedly connected to the first clamping plate 10, and the other end of the upright 50 passes through the second clamping plate 20 and the third clamping plate 30 and at least partially extends out of the third clamping plate 30. The other end of the upright post 50 is provided with a first thread, and the upright post 50 is provided with scale marks.

Preferably, the first clamping plate 10, the second clamping plate 20 and the third clamping plate 30 may have a quadrangular planar plate-like structure. The columns 50 and the nut assemblies 60 are respectively provided in 4 numbers, and one ends of the 4 columns 50 are respectively connected to four corners of the first clamping plate 10.

Wherein, the first adjusting nut 61 is detachably connected to the first thread on the upright post 50, the outer wall of the first adjusting nut 61 is provided with the second thread, the second adjusting nut 62 is connected to the second thread, and the second adjusting nut 62 is stopped at one end of the first adjusting nut 61 near the third clamping plate 30. The first screw thread interval is greater than the second screw thread interval, can carry out coarse adjustment to the nut assembly 60 through adjusting first adjusting nut 61, can carry out fine adjustment to the nut assembly 60 through adjusting second adjusting nut 62.

It should be noted that, in the embodiment of the present utility model, the pitch of the second thread on the first adjusting nut 61 is smaller than the pitch of the first thread on the post 50.

In the embodiment of the present utility model, the first adjusting nut 61 is detachably connected to the first screw thread provided on the upright 50 by providing the scale mark on the upright 50, the second screw thread is provided on the outer wall of the first adjusting nut 61, the second adjusting nut 62 is connected to the second screw thread, and the second adjusting nut is stopped at one end of the first adjusting nut 61 near the third clamping plate 30. The nut assembly 60 can be coarsely adjusted by adjusting the first adjusting nut 61, and the nut assembly 60 can be finely adjusted by adjusting the second adjusting nut 62, so that the tightening degrees of the at least two nut assemblies 60 are the same or similar. The battery is balanced under pressure, and the accuracy of the test result is improved. The problem that the accuracy of a test result is affected due to uneven pressure of a battery caused by uneven included angles is avoided.

As an alternative embodiment, as shown in fig. 6, a step structure 611 is provided on the first adjusting nut 61, a stop portion 612 is provided on an end of the first adjusting nut 61 near the third clamping plate 30, and the second thread is provided between the step structure 611 and the stop portion 612; the second adjusting nut 62 is stopped by the stop 612 and the step 611.

In the embodiment of the present utility model, as shown in fig. 6, a stop portion 612 is disposed at an end of the first adjusting nut 61 near the third clamping plate 30, a step structure 611 is disposed at an end of the first adjusting nut 61 far from the third clamping plate 30, and a second thread is disposed between the stop portion 612 and the step structure 611. The second adjustment nut 62 is connected to the second thread and stops against the stop 612 and the step 611.

In the embodiment of the present utility model, by providing the stop portion 612 at one end of the first adjustment nut 61 and the step structure 611 at the other end, a second thread is provided between the stop portion 612 and the step structure 611, and the second adjustment nut 62 is connected to the second thread. By adjusting the second adjusting nut 62, the first adjusting nut 61 can be driven to move along the axial direction of the upright post 50, and the nut assemblies 60 can be finely adjusted, so that the tightening degrees of at least two groups of nut assemblies 60 are the same or similar. The battery is balanced under pressure, so that the accuracy of the test result can be improved.

As an alternative embodiment, as shown in fig. 2 to 5, the second adjustment nut 62 includes: the adjusting clamp ring 621, the adjusting clamp ring 621 is provided with a through hole, and the through hole extends to the inner wall along the outer wall of the adjusting clamp ring 621; the second adjusting nut body 622, the adjusting snap ring 621 and the second adjusting nut body 622 are sequentially connected to the second thread, and the second adjusting nut body 622 is elastically clamped to the adjusting snap ring 621; the clamping piece 623 is inserted into the through hole, and is elastically clamped to the outer wall of the first adjusting nut 61.

In the embodiment of the present utility model, as shown in fig. 2 to 5, the second adjustment nut 62 includes an adjustment snap ring 621, a second adjustment nut body 622, and a clip 623. Wherein, adjust snap ring 621 and second adjusting nut body 622 connect gradually in the second screw thread, adjust the snap ring 621 and be close to third splint 30 setting, second adjusting nut body 622 is kept away from third splint 30 setting, and second adjusting nut body 622 elasticity joint in adjust the snap ring 621.

As shown in fig. 2 to 5, the adjusting collar 621 is provided with a through hole, the through hole extends from the outer wall to the inner wall of the adjusting collar 621, and the clamping member 623 extends into the through hole and is elastically clamped to the outer wall of the first adjusting nut 61.

When the nut assembly 60 needs to be finely adjusted by the second adjusting nut 62, the clamping member 623 can be pressed, so that the clamping member 623 clamps the outer wall of the first adjusting nut 61, and then the second adjusting nut body 622 is rotated. Therefore, the second adjusting nut body 622 can drive the adjusting snap ring 621 to move along the axial direction of the upright post 50, and further drive the first adjusting nut 61 to move along the axial direction of the upright post 50, so as to finely adjust the nut assemblies 60, and the tightening degrees of at least two groups of nut assemblies 60 are the same or similar. The battery is balanced under pressure, so that the accuracy of the test result can be improved.

It should be noted that, in the embodiment of the present utility model, a plurality of through holes may be provided, and a plurality of through holes may be provided at intervals along the circumferential direction of the adjustment collar 621, and the clamping member 623 also includes a plurality of clamping members 623, where each clamping member 623 is provided corresponding to one through hole.

As an alternative embodiment, as shown in fig. 2 to 5, the clip 623 includes: the clamping pin 6231, the clamping pin 6231 stretches into the through hole; the first spring 6232, the first spring 6232 is sleeved on the clamping pin 6231, one end of the first spring 6232 is abutted against one end of the clamping pin 6231 away from the first adjusting nut 61, and the other end of the first spring 6232 is abutted against the outer wall of the first adjusting nut 61.

In the embodiment of the present utility model, as shown in fig. 2 to 5, the click piece 623 is provided to include a click pin 6231 and a first spring 6232. Wherein, the clamping pin 6231 is inserted into a through hole arranged on the adjusting clamping ring 621. The first spring 6232 is sleeved on the locking pin 6231, one end of the first spring 6232 is abutted against the end portion of the locking pin 6231 away from the first adjusting nut 61, and the other end of the first spring 6232 is abutted against the outer wall of the first adjusting nut 61. So that the locking pin 6231 can be elastically locked to the outer wall of the first adjustment nut 61 by the first spring 6232.

As an alternative embodiment, as shown in fig. 2 to 5, a first groove is formed at an end of the second adjusting nut body 622 near the adjusting snap ring 621, and a first protrusion is formed at an end of the adjusting snap ring 621 near the second adjusting nut body 622, wherein the first protrusion is elastically clamped in the first groove.

In the embodiment of the present utility model, as shown in fig. 2 to 5, a first groove is disposed at one end of the second adjusting nut body 622 near the adjusting collar 621, and a first protrusion is disposed at one end of the adjusting collar 621 near the second adjusting nut body 622. The first protrusion is elastically clamped in the first groove, so that the second adjusting nut body 622 is elastically clamped in the adjusting clamp ring 621.

Of course, the second adjusting nut body 622 may have a first protrusion at one end thereof adjacent to the adjusting collar 621, and the adjusting collar 621 may have a first groove at one end thereof adjacent to the second adjusting nut body 622, so as to elastically clamp the first protrusion in the first groove. So that the second adjusting nut body 622 is elastically clamped to the adjusting clamp ring 621. In this regard, the embodiment of the present utility model is not particularly limited, and in actual use, a technician may set as needed.

As an alternative embodiment, as shown in fig. 4 and 5, the fixture further includes: a push rod 70 and a second spring 71; the end of the nut assembly 60, which is close to the third clamping plate 30, is provided with a second groove, the push rod 70 comprises an annular connecting piece 72 and a connecting rod 73 connected to the end of the annular connecting piece 72, the annular connecting piece 72 is sleeved on the upright post 50 and is abutted to the third clamping plate 30, and the connecting rod 73 is clamped in the second groove; the second spring 71 is sleeved on the connecting rod 73, one end of the second spring 71 is abutted against the annular connecting piece 72, and the other end of the second spring extends into the second groove and is abutted against the bottom wall of the second groove.

In the embodiment of the present utility model, as shown in fig. 4 and 5, a second groove is disposed at one end of the nut assembly 60 near the third clamping plate 30, the annular connecting piece 72 is sleeved on the upright post 50 and abuts against the third clamping plate 30, and the connecting rod 73 is clamped in the second groove. And the second spring 71 is sleeved on the connecting rod 73, so that one end of the second spring 71 is abutted against the annular connecting piece 72, and the other end of the second spring 71 extends into the second groove and is abutted against the bottom wall of the second groove. When the expansion force generated by the expansion of the battery presses the third clamping plate 30, the ring-shaped connection member 72 presses the second spring 71 upward, and the second spring 71 can absorb the expansion force, thereby releasing the expansion force generated by the battery.

As an alternative embodiment, as shown in fig. 4 and 5, the connection rod 73 includes a plurality of connection rods 73, which are disposed at intervals along the circumferential direction of the ring-shaped connection member 72, and are each connected to one end of the ring-shaped connection member 72; the second springs 71 also include a plurality of second springs 71, each of which is disposed corresponding to one of the connecting rods 73.

In the embodiment of the present utility model, as shown in fig. 4 and 5, a plurality of connecting rods 73 may be provided, and the plurality of connecting rods 73 may be provided at intervals along the circumferential direction of the annular connecting member 72 and all connected to the same end of the annular connecting member 72. Meanwhile, a plurality of second springs 71 are also provided, and each second spring 71 is provided corresponding to one connecting rod 73.

When the expansion force generated by the expansion of the battery presses the third clamping plate 30, the ring-shaped connection member 72 presses the plurality of second springs 71 upward, and the expansion force is absorbed by the plurality of second springs 71, so that the expansion force generated by the expansion of the battery can be more effectively released.

As an alternative embodiment, the post 50 is of annular construction and has a transparent cavity wall, and graduation marks extending axially along the post 50 are provided on the inner wall of the post 50.

The pillars 50 in embodiments of the present utility model may be provided in a ring-like configuration with transparent cavity walls. The first thread is disposed on the outer wall of the upright post 50, the scale mark is disposed on the inner wall of the upright post 50, and the scale mark extends along the axial direction of the upright post 50. So that the first adjustment nut 61 and the second adjustment nut 62 can be adjusted according to the scale lines while not affecting the reliability of the first screw connection of the first adjustment nut 61 with the first screw.

It should be noted that, in the embodiment of the present utility model, both the first thread and the graduation mark may be disposed on the outer wall of the upright 50. In this regard, the embodiments of the present utility model are not limited excessively, and in practical use, a skilled person may select an appropriate structure as required.

As an alternative embodiment, as shown in fig. 3 and 5, the fixture further includes: the scale drum 80, wherein, the outer wall of scale drum 80 is provided with the scale mark, and scale drum 80 stretches into in the stand 50 at least partially, and the joint is in the inner wall of stand 50.

As shown in fig. 3 and 5, the fixture in the embodiment of the present utility model may further include a scale drum 80, where scale marks are disposed on an outer wall of the scale drum 80, so that the scale drum 80 at least partially extends into the upright post 50 and is clamped to an inner wall of the upright post 50. So that the first adjustment nut 61 and the second adjustment nut 62 can be adjusted by the scale marks on the scale drum 80.

As an alternative embodiment, as shown in fig. 3 and 5, the graduation marks include a first graduation mark 81 and a second graduation mark 82, wherein the first graduation mark 81 and the second graduation mark 82 are disposed at an outer wall of the graduation drum 80 along an axial direction of the graduation drum 80 at intervals so as to coarse-tune the first adjustment nut 61 through the first graduation mark 81 and fine-tune the second adjustment nut 62 through the second graduation mark 82.

As shown in fig. 3 to 5, the first and second graduation marks 81 and 82 are disposed at an outer wall of the graduation drum 80 at intervals along an axial direction of the graduation drum 80, and the first graduation mark 81 is disposed at an end of the graduation drum 80 remote from the third clamping plate 30, so that the first adjustment nut 61 can be coarse-adjusted through the first graduation mark 81. The second graduation marks 82 are disposed at an end of the graduation drum 80 adjacent to the third clamping plate 30, so that the second adjustment nut 62 can be finely adjusted by the second graduation marks 82.

It should be noted that, in the embodiment of the present utility model, the minimum scale of the second scale line 82 is smaller than the minimum scale of the first scale line 81. For example, the minimum scale of the second scale line 82 is 0.1mm, and the minimum scale of the first scale line 81 may be set to 1mm.

The embodiment of the utility model provides a clamp, which comprises a first clamping plate, a second clamping plate and a third clamping plate which are sequentially arranged at intervals, wherein the second clamping plate and the third clamping plate are used for clamping a battery; the sensor is arranged between the first clamping plate and the second clamping plate; the device comprises at least two upright posts, wherein one end of each upright post is fixedly connected with a first clamping plate, the other end of each upright post passes through a second clamping plate and a third clamping plate and at least partially extends out of the third clamping plate, a first thread is arranged at the other end of each upright post, and scale marks are arranged on each upright post; and at least two groups of nut components, wherein the nut components comprise a first adjusting nut and a second adjusting nut, the first adjusting nut is detachably connected with a first thread of the upright post, a second thread is arranged on the outer wall of the first adjusting nut, the second adjusting nut is connected with the second thread, and the second adjusting nut is stopped at one end, close to the third clamping plate, of the first adjusting nut so as to coarsely adjust the nut components through the first adjusting nut, and finely adjust the nut components through the second adjusting nut. In the embodiment of the utility model, scale marks are arranged on the upright post, the first adjusting nut is detachably connected with a first thread arranged on the upright post, a second thread is arranged on the outer wall of the first adjusting nut, the second adjusting nut is connected with the second thread, and the second adjusting nut is stopped at one end of the first adjusting nut, which is close to the third clamping plate. Therefore, the first adjusting nut can be adjusted to coarse tune the nut component, and the second adjusting nut can be adjusted to fine tune the nut component, so that the tightening degrees of at least two groups of nut components are the same or similar. The battery is balanced under pressure, and the accuracy of the test result is improved. The problem that the accuracy of a test result is affected due to uneven pressure of a battery caused by uneven included angles is avoided.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

While alternative embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the embodiments of the utility model.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude that an additional identical element is present in an article or terminal device comprising the element.

While the foregoing has been described in some detail by way of illustration of the principles and embodiments of the utility model, and while in accordance with the principles and implementations of the utility model, those skilled in the art will readily recognize that the utility model is not limited thereto.

Claims (10)

1. A fixture for testing battery expansion force, comprising:

the battery clamping device comprises a first clamping plate (10), a second clamping plate (20) and a third clamping plate (30), wherein the first clamping plate (10), the second clamping plate (20) and the third clamping plate (30) are arranged at intervals between each other, and the second clamping plate (20) and the third clamping plate (30) are used for clamping the battery;

-a sensor (40), the sensor (40) being arranged between the first clamping plate (10) and the second clamping plate (20);

the two clamping plates (30) are arranged on the same side of the first clamping plate (10), one end of each clamping plate (50) is fixedly connected with the first clamping plate (10), the other end of each clamping plate (50) penetrates through the second clamping plate (20) and the third clamping plate (30) and at least partially stretches out of the third clamping plate (30), a first thread is arranged at the other end of each clamping plate (50), and scale marks are arranged on each clamping plate (50);

and at least two sets of nut assemblies (60), wherein the nut assemblies (60) comprise a first adjusting nut (61) and a second adjusting nut (62), the first adjusting nut (61) is detachably connected with the first screw thread of the upright post (50), a second screw thread is arranged on the outer wall of the first adjusting nut (61), the second adjusting nut (62) is connected with the second screw thread, and the second adjusting nut (61) is stopped at one end, close to the third clamping plate (30), of the first adjusting nut, and the screw pitch of the second screw thread is smaller than that of the first screw thread.

2. The clamp according to claim 1, characterized in that the first adjusting nut (61) is provided with a step structure (611), the end of the first adjusting nut (61) near the third clamping plate (30) is provided with a stop part (612),

the second thread is arranged between the step structure (611) and the stop part (612); the second adjusting nut (62) is stopped by the stop part (612) and the step structure (611).

3. The clamp of claim 1, wherein the second adjustment nut (62) comprises:

an adjusting clamping ring (621), wherein a through hole is formed in the adjusting clamping ring (621), and the through hole extends to the inner wall along the outer wall of the adjusting clamping ring (621);

the second adjusting nut body (622), the adjusting clamp ring (621) and the second adjusting nut body (622) are sequentially connected to the second threads, and the second adjusting nut body (622) is elastically clamped to the adjusting clamp ring (621);

the clamping piece (623) stretches into the through hole, and is elastically clamped to the outer wall of the first adjusting nut (61).

4. A clamp as claimed in claim 3, wherein the clamp (623) comprises:

a clamping pin (6231), the clamping pin (6231) extending into the through hole;

the first spring (6232), first spring (6232) cover is located joint round pin (6231), the one end butt of first spring (6232) in joint round pin (6231) keep away from the one end of first adjusting nut (61), the other end butt of first spring (6232) in the outer wall of first adjusting nut (61).

5. The fixture according to claim 4, wherein a first groove is formed at one end of the second adjusting nut body (622) close to the adjusting snap ring (621), a first protrusion is formed at one end of the adjusting snap ring (621) close to the second adjusting nut body (622),

the first protrusion is elastically clamped in the first groove.

6. The clamp of claim 1, wherein the clamp further comprises: a push rod (70) and a second spring (71); wherein,

a second groove is arranged at one end of the nut component (60) close to the third clamping plate (30),

the push rod (70) comprises an annular connecting piece (72) and a connecting rod (73) connected to the end part of the annular connecting piece (72), the annular connecting piece (72) is sleeved on the upright post (50) and is abutted to the third clamping plate (30), and the connecting rod (73) is clamped in the second groove;

the second spring (71) is sleeved on the connecting rod (73), one end of the second spring (71) is abutted to the annular connecting piece (72), and the other end of the second spring extends into the second groove and is abutted to the bottom wall of the second groove.

7. The clamp according to claim 6, wherein the connecting rod (73) comprises a plurality of connecting rods (73) which are arranged at intervals along the circumferential direction of the annular connecting piece (72) and are connected to one end of the annular connecting piece (72);

the second springs (71) also comprise a plurality of second springs (71), and each second spring (71) is arranged corresponding to one connecting rod (73).

8. The fixture according to claim 1, wherein the upright (50) is of annular structure and has a transparent cavity wall, and graduation marks extending axially along the upright (50) are provided on an inner wall of the upright (50).

9. The clamp of claim 1, wherein the clamp further comprises: a scale drum (80), wherein,

the outer wall of the scale drum (80) is provided with scale marks, and the scale drum (80) at least partially stretches into the upright post (50) and is clamped to the inner wall of the upright post (50).

10. The clamp according to claim 9, characterized in that the graduation marks comprise a first graduation mark (81) and a second graduation mark (82), wherein the first graduation mark (81) and the second graduation mark (82) are arranged on the outer wall of the graduation drum (80) at intervals along the axial direction of the graduation drum (80) so as to coarse tune the first adjusting nut (61) through the first graduation mark (81) and fine tune the second adjusting nut (62) through the second graduation mark (82).