Center clamp and butt joint device

Abstract

The utility model provides a center clamp and a butt joint device, relates to the semiconductor test technology field, the center clamp provided by the utility model comprises a support mechanism, a first driver, a locking mechanism and a brake assembly, the locking mechanism is arranged at one axial end of the support mechanism and is provided with a locking member used for locking with a needle card carrying platform, and the first driver is arranged on the support mechanism. The first driver and the brake assembly are both connected between the supporting mechanism and the locking mechanism, the first driver is used for driving the locking mechanism to move in the axial direction of the supporting mechanism, and the brake assembly is used for locking the position of the locking mechanism relative to the supporting mechanism. According to the center clamp provided by the utility model, the service life of the first driver can be prolonged, the first driver can be effectively prevented from retreating under the action of the test pressure, and the test pressure can meet the test requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of semiconductor testing, especially to a center clamp and a docking device. BACKGROUND

[0002] When testing the wafer on the wafer carrier through the needle card, the needle card carrier needs to be connected with the center clamp in the docking device, and after the connection is completed, the needle card and the wafer carrier need to have a certain test pressure to make the needle card and the wafer in good contact, and if only the driver on the center clamp bears the above test pressure, not only the life of the driver will be shortened, but also the driver is easy to back off under the action of the test pressure, so that the test pressure cannot meet the test requirements. SUMMARY

[0003] The utility model discloses a center clamp and a docking device, which can prolong the service life of the first driver, effectively prevent the first driver from back off under the action of the test pressure, and ensure that the test pressure can meet the test requirements.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] In a first aspect, the utility model provides a center clamp, which comprises a supporting mechanism, a first driver, a locking mechanism and a brake assembly, the locking mechanism is arranged at one end of the supporting mechanism in the axial direction, and the locking mechanism has a locking part for locking with the needle card carrier, the first driver and the brake assembly are connected between the supporting mechanism and the locking mechanism, the first driver is used to drive the locking mechanism to move along the axial direction of the supporting mechanism, and the brake assembly is used to lock the position of the locking mechanism relative to the supporting mechanism.

[0006] Further, the locking mechanism comprises a limiting disc, an inner locking ring and a driving assembly.

[0007] One side of the limiting disc is provided with a limiting groove, the limiting groove is sequentially provided with a first limiting surface and a second limiting surface along the axial direction of the limiting disc, and the other side of the limiting disc is connected with the driving assembly, the first driver and the brake assembly.

[0008] The inner locking ring is arranged in the limiting groove in the axial direction of itself, the locking part is arranged on the inner locking ring in the radial direction of itself, the locking part has an unlocking state matched with the first limiting surface and a locking state matched with the second limiting surface, the driving assembly is connected with the inner locking ring, and the driving assembly is used to drive the inner locking ring to slide relative to the limiting groove in the axial direction of itself, so that the locking part is switched between the unlocking state and the locking state.

[0009] Further, the first limiting surface is arranged close to the slot opening of the limiting slot, and the second limiting surface is arranged close to the slot bottom of the limiting slot.

[0010] The first limiting surface gradually shrinks towards the axis of the limiting disc in the direction close to the second limiting surface, and the second limiting surface is a cylindrical surface.

[0011] Further, a tapered hole is arranged in the inner locking ring facing the side wall of the limiting slot, the tapered hole extends along the radial direction of the inner locking ring, and the inner diameter of the tapered hole gradually decreases in the direction close to the axis of the inner locking ring.

[0012] The locking member is arranged in the tapered hole, when the locking member is in the locking state, the locking member abuts against the second limiting surface and partially protrudes from one end of the tapered hole close to the axis of the inner locking ring, and when the locking member is in the unlocking state, the locking member is movably arranged in the tapered hole along the extension direction of the tapered hole.

[0013] Further, the driving assembly comprises a second driver and a guide seat, the fixed end of the second driver is connected to the side of the limiting disc away from the inner locking ring, the power output end of the second driver is connected with the guide seat, the guide seat penetrates through the limiting disc and is connected with the inner locking ring, the guide seat is in sliding fit with the limiting disc along the axial direction of the inner locking ring, and the second driver is used to drive the guide seat to slide relative to the limiting disc along the axial direction of the inner locking ring.

[0014] Further, the guide seat comprises a connecting seat and a plurality of guide shafts, the power output end of the second driver is connected with the connecting seat, the guide shafts penetrate through the limiting disc and are in sliding fit with the limiting disc along the axial direction of the inner locking ring, and the two ends of the guide shafts are respectively connected with the connecting seat and the inner locking ring.

[0015] Further, the limiting disc comprises a top plate and an outer locking ring mounted on one side of the top plate, the other side of the top plate is connected with the driving assembly, the first driver and the brake assembly, and the inner wall of the outer locking ring forms the limiting slot.

[0016] Further, the brake assembly comprises a brake and a guide column, the brake is connected with the supporting mechanism, one end of the guide column is connected with the limiting disc, the other end of the guide column extends into the brake and is in sliding fit with the brake along the axial direction of the supporting mechanism, and the brake is used to release or lock the guide column.

[0017] Further, the first driver is configured as a plurality, and the plurality of first drivers are uniformly distributed around the axial direction of the support mechanism; and / or, the brake assembly is configured as a plurality, and the plurality of brake assemblies are uniformly distributed around the axial direction of the support mechanism.

[0018] In the second aspect, the utility model also provides a docking device, including the center clamp of above-mentioned scheme.

[0019] The center clamp and the docking device can produce the following beneficial effects.

[0020] When the center clamp is used, the first driver drives the locking mechanism to move along the axial direction of the support mechanism, so that the locking mechanism is aligned with the clamping groove on the needle clamping platform, the brake assembly locks the position of the locking mechanism relative to the support mechanism after the locking mechanism is in place, and then the locking mechanism acts to lock the locking member with the needle clamping platform, thereby realizing the connection between the center clamp and the needle clamping platform.

[0021] Compared with the prior art, the brake assembly in the center clamp provided by the first aspect of the utility model can lock the position of the locking mechanism relative to the support mechanism after the locking mechanism is in place, thereby assisting or even replacing the first driver to bear the test pressure, prolonging the service life of the first driver, effectively preventing the first driver from retreating under the action of the test pressure, and ensuring that the test pressure can meet the test requirements.

[0022] The docking device provided by the second aspect of the utility model has the center clamp provided by the first aspect of the utility model, thereby having all the beneficial effects of the center clamp provided by the first aspect of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 A three-dimensional structural schematic view of a center clamp provided by the utility model embodiment under the first visual angle;

[0025] Figure 2 A top view of a center clamp provided by the utility model embodiment;

[0026] Figure 3 A Figure 2 A-A sectional view of the center clamp;

[0027] Figure 4 AFigure 3 A local enlarged schematic diagram of point D;

[0028] Figure 5 for Figure 2 BB cross-section diagram;

[0029] Figure 6 A schematic diagram of a three-dimensional structure of a locking mechanism provided in an embodiment of the present utility model;

[0030] Figure 7 A schematic diagram of the three-dimensional structure of a limit plate provided in an embodiment of the present utility model;

[0031] Figure 8 for Figure 2 C-C cross-section diagram;

[0032] Figure 9 A schematic diagram of the three-dimensional structure of a central clamp (without a base) provided by an embodiment of the present utility model at a second viewing angle;

[0033] Figure 10 A schematic diagram of the three-dimensional structure of a central clamp provided in an embodiment of the present invention from a third perspective.

[0034] Icons: 1-support mechanism; 11-housing; 12-top seat; 13-base; 2-first driver; 3-locking mechanism; 31-limiting plate; 311-limiting groove; 3111-first limiting surface; 3112-second limiting surface; 312-top plate; 3121-limiting end surface; 3122-through hole; 313-outer locking ring; 314-linear bearing; 315-first guide seat; 316-second guide seat; 32-inner locking ring; 321-locking piece; 322-tapered hole; 33-drive assembly; 331-second driver; 332-guide seat; 3321-connecting frame; 3322-guide shaft; 4-brake assembly; 41-brake; 42-guide column. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] The specific embodiments of the utility model are described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model, and not used to limit the utility model.

[0039] The embodiment of the first aspect of the utility model is to provide a center clamp, as shown in Figures 1 to 5 The locking mechanism 3 is located at one end of the axial direction of the supporting mechanism 1, and the locking mechanism 3 has a locking piece 321 for locking with the needle card loading platform, the first driver 2 and the brake assembly 4 are connected between the supporting mechanism 1 and the locking mechanism 3, the first driver 2 is used to drive the locking mechanism 3 to move along the axial direction of the supporting mechanism 1, and the brake assembly 4 is used to lock the position of the locking mechanism 3 relative to the supporting mechanism 1.

[0040] The center clamp provided by the above embodiment is used, as shown in Figure 3 The first driver 2 can drive the locking mechanism 3 to move along the axial direction of the supporting mechanism 1, so that the locking mechanism 3 is aligned with the clamping groove on the needle card loading platform, and after the locking mechanism 3 is in place, as shown in Figure 5 The brake assembly 4 locks the position of the locking mechanism 3 relative to the supporting mechanism 1, and then the locking mechanism 3 acts so that the locking piece 321 is locked and matched with the needle card loading platform, realizing the connection of the center clamp and the needle card loading platform.

[0041] When testing the wafer on the wafer carrier by the needle card, the brake assembly can lock the position of the locking mechanism 3 relative to the support mechanism 1, so as to replace the first driver 2 to bear the test pressure, prolong the service life of the first driver 2, effectively avoid the first driver 2 from being retracted under the action of the test pressure, and ensure that the test pressure can meet the test requirements.

[0042] The structure of the locking mechanism 3 will be described in detail as follows:

[0043] In an optional embodiment, as shown in Figure 3 , the locking mechanism 3 comprises a limiting disc 31, an inner locking ring 32 and a driving assembly 33, and the limiting disc 31 and the inner locking ring 32 can be coaxially arranged with the support mechanism 1, wherein:

[0044] As shown in Figure 4 , one side of the limiting disc 31 is provided with a limiting groove 311, and the limiting groove 311 is sequentially provided with a first limiting surface 3111 and a second limiting surface 3112 along the axial direction of the limiting disc 31, as shown in Figure 2 and Figure 5 , the other side of the limiting disc 31 is connected with the driving assembly 33, the first driver 2 and the brake assembly 4;

[0045] As shown in Figure 4 , the inner locking ring 32 is slidingly arranged in the limiting groove 311 along the axial direction of the inner locking ring 32, and the inner locking ring 32 is movably arranged with a locking piece 321 along the radial direction of the inner locking ring 32.

[0046] In use, as shown in Figure 3 and Figure 4 , the driving assembly 33 can first drive the inner locking ring 32 to move upward, so that the locking piece 321 on the inner locking ring 32 cooperates with the first limiting surface 3111, and at this time the locking piece 321 is in an unlocked state; then the first driver 2 drives the limiting disc 31 to move upward along the axial direction of the support mechanism 1, and at the same time the driving assembly 33, the inner locking ring 32 and the locking piece 321 move upward synchronously with the limiting disc 31, so that the whole locking mechanism 3 is aligned with the clamping groove on the needle card carrier; then the driving assembly 33 drives the inner locking ring 32 to move downward, so that the locking piece 321 on the inner locking ring 32 cooperates with the second limiting surface 3112, and at this time the locking piece 321 is in a locked state, clamped into the clamping groove on the needle card carrier, and the connection between the center clamp and the needle card carrier is realized.

[0047] In the above-mentioned locking mechanism 3, since the locking piece 321 can be switched between the unlocked state and the locked state, the locking piece 321 can be clamped into the clamping groove on the needle card carrier without providing a large locking force during the locking process with the needle card carrier, and the locking process only needs to drive the inner locking ring 32 to slide along the axial direction of the inner locking ring 32 relative to the limiting groove 311 by the driving assembly 33, which is simple to operate and easy to quickly realize the connection between the center clamp and the needle card carrier.

[0048] When the driving assembly 33 drives the inner locking ring 32 to move downward to the position, as shown in Figure 4 If there is a certain axial distance between the bottom surface of the inner locking ring 32 and the limiting end surface 3121 of the limiting disc 31, the test pressure applied by the needle card carrier to the inner locking ring 32 will act on the driving assembly 33 to a great extent, which shortens the service life of the driving assembly 33. Therefore, in the alternative embodiment, as shown in Figure 4 When the driving assembly 33 drives the inner locking ring 32 to move downward to the position, the bottom surface of the inner locking ring 32 abuts against the limiting end surface 3121 of the limiting disc 31, so that the test pressure applied by the needle card carrier to the inner locking ring 32 during the test can be directly transmitted to the limiting disc 31 through the limiting end surface 3121 and act on the brake assembly 4, which is borne by the brake assembly, reduces or even avoids the transmission of the test pressure to the driving assembly 33, protects the driving assembly 33 and prolongs the service life of the driving assembly 33.

[0049] In the alternative embodiment, as shown in Figure 4 The first limiting surface 3111 is arranged close to the slot opening of the limiting slot 311, and the second limiting surface 3112 is arranged close to the slot bottom of the limiting slot 311, that is, the inner locking ring 32 can cooperate with the first limiting surface 3111 when moving toward the slot opening, and the inner locking ring 32 can cooperate with the second limiting surface 3112 when moving toward the slot bottom.

[0050] Specifically, the first limiting surface 3111 gradually shrinks toward the axis of the limiting disc 31 in the direction close to the second limiting surface 3112, and the second limiting surface 3112 is a cylindrical surface. Such arrangement can make the locking piece 321 have a larger radial movement space when cooperating with the first limiting surface 3111, so as to cancel the locking with the clamping groove on the needle card carrier, and make the locking piece 321 protrude out of the inner wall of the inner locking ring 32 under the pushing of the second limiting surface 3112 when cooperating with the second limiting surface 3112, so as to realize the locking with the clamping groove on the needle card carrier.

[0051] In the alternative embodiment, as shown in Figure 4 To facilitate the limiting of the locking piece 321, a tapered hole 322 is arranged on the side wall of the inner locking ring 32 facing the limiting slot 311, the tapered hole 322 extends along the radial direction of the inner locking ring 32, and the inner diameter of the tapered hole 322 gradually decreases in the direction gradually close to the axis of the inner locking ring 32.

[0052] As shown in Figure 4As shown, when the locking piece 321 is in the locked state, the locking piece 321 abuts against the second limiting surface 3112 and partially protrudes from the tapered hole 322 at the end close to the axis of the inner locking ring 32, at this time, the locking piece 321 can be locked in the clamping groove on the needle clamping carrier; when the locking piece 321 is in the unlocked state, the locking piece 321 is movably arranged in the tapered hole 322 along the extension direction of the tapered hole 322, and the right end of the locking piece 321 can be retracted into the tapered hole 322.

[0053] In an optional embodiment, as shown in Figure 4 The locking piece 321 can be spherical.

[0054] It can be understood that the caliber of the end of the tapered hole 322 close to the axis of the inner locking ring 32 is smaller than the diameter of the locking piece 321, and the caliber of the end of the tapered hole 322 away from the axis of the inner locking ring 32 is larger than the diameter of the locking piece 321.

[0055] The locking piece 321 is arranged in the tapered hole 322, when the locking piece 321 is in the locked state, the locking piece 321 abuts against the second limiting surface 3112 and partially protrudes from the tapered hole 322 at the end close to the axis of the inner locking ring 32, when the locking piece 321 is in the unlocked state, the locking piece 321 is movably arranged in the tapered hole 322 along the extension direction of the tapered hole 322.

[0056] In an optional embodiment, the locking piece 321 can be provided in plurality, and the plurality of locking pieces 321 are uniformly and spacedly distributed around the axis of the inner locking ring 32.

[0057] In an optional embodiment, as shown in Figure 6 The driving assembly 33 includes a second driver 331 and a guide seat 332, the fixed end of the second driver 331 is connected to the side of the limiting disc 31 away from the inner locking ring 32, that is, the second driver 331 can move up and down with the limiting disc 31, the power output end of the second driver 331 is connected with the guide seat 332, the guide seat 332 penetrates through the limiting disc 31 and is connected with the inner locking ring 32, and the guide seat 332 is in sliding fit with the limiting disc 31 along the axial direction of the inner locking ring 32.

[0058] In use, the second driver 331 can drive the guide seat 332 to slide along the axial direction of the inner locking ring 32 relative to the limiting disc 31, since the guide seat 332 is connected with the inner locking ring 32, the guide seat 332 can drive the inner locking ring 32 to slide relative to the limiting disc 31 at the same time, so as to realize the switching of the locking piece 321 on the inner locking ring 32 between the unlocked state and the locked state.

[0059] The fixed end of the second driver 331 can be connected to the side of the limiting disc 31 away from the inner locking ring 32 through a connecting member such as a screw, and the guide seat 332 can also be connected with the inner locking ring 32 through a connecting member such as a screw.

[0060] The second driver 331 can be a thrust cylinder, and of course, the second driver 331 can also be other drivers capable of realizing linear motion.

[0061] In optional embodiments, as shown in Figure 6 The guide seat 332 includes a connecting seat and a plurality of guide shafts 3322, the power output end of the second driver 331 is connected with the connecting seat, the guide shafts 3322 penetrate through the limiting disc 31 and slide fit with the limiting disc 31 along the axial direction of the inner locking ring 32, and the two ends of the guide shafts 3322 are connected with the connecting frame 3321 and the inner locking ring 32 respectively.

[0062] In the above embodiments, the inner locking ring 32 can be connected with the second driver 331 through the connecting seat and the plurality of guide shafts 3322, and the driving process is more stable and reliable. Since the guide shafts 3322 slide fit with the limiting disc 31 along the axial direction of the inner locking ring 32, the limiting disc 31 can guide the movement of the guide shafts 3322, thereby ensuring the stability of the movement of the inner locking ring 32.

[0063] Specifically, the guide shafts 3322 can be four, and the four guide shafts 3322 are uniformly and spacedly distributed around the axial direction of the inner locking ring 32.

[0064] In optional embodiments, in order to reduce the friction between the guide shafts 3322 and the limiting disc 31, as shown in Figure 6 A linear bearing 314 is arranged between the guide shafts 3322 and the limiting disc 31.

[0065] In optional embodiments, in order to ensure the stability of the axial movement of the limiting disc 31, as shown in Figure 6 A guide structure is arranged on the limiting disc 31, the guide structure includes a first guide seat 315 and a second guide seat 316, the first guide seat 315 can be connected with the limiting disc 31 through screws or other connecting members, the second guide seat 316 can be connected with the base 13 through screws or other connecting members, and the first guide seat 315 and the second guide seat 316 slide fit along the axial direction of the limiting disc 31.

[0066] The guide structure can be one, two, three, four or more.

[0067] In optional embodiments, as shown in Figure 6 The guide structure is two.

[0068] In optional embodiments, as shown in Figure 6 The connecting seat includes a connecting frame 3321, and the power output end of the second driver 331 is connected with the connecting frame 3321.

[0069] In optional embodiments, in order to reduce the weight of each connecting frame, as shown in Figure 6As shown, the connecting frame 3321 comprises a center part and a plurality of extension arms connected with the center part, the extension arms are distributed radially, and a guiding shaft 3322 is fixedly connected to the end of the extension arm away from the center part.

[0070] In an optional embodiment, as shown in Figure 7 and Figure 8 As shown, the limiting disc 31 comprises a top plate 312 and an outer locking ring 313 mounted on one side of the top plate 312, the other side of the top plate 312 is connected with the driving assembly 33, the first driver 2 and the brake assembly 4, and the inner wall of the outer locking ring 313 forms a limiting groove 311.

[0071] The limiting disc 31 has a simple structure, the top plate 312 has a limiting end face 3121, which can axially limit the inner locking ring 32 during the test, so that the test pressure applied by the needle carding platform to the inner locking ring 32 can be directly transmitted to the limiting disc 31 through the limiting end face 3121 and acted on the brake assembly 4, thereby protecting the driving assembly 33. At the same time, through the driving of the first driver 2 to the top plate 312, the driving assembly 33, the outer locking ring 313 and the inner locking ring 32 can be synchronously axially moved, so that the locking mechanism 3 is aligned with the clamping groove on the needle carding platform in the axial direction.

[0072] Referring to Figure 7 , a through hole 3122 for the guiding shaft 3322 to pass through is formed on the limiting end face 3121, and the guiding shaft 3322 can be fixedly connected with the inner locking ring 32 through the through hole 3122.

[0073] Specifically, the top plate 312 and the outer locking ring 313 can be connected by screws or the like, and the guiding shaft 3322 and the inner locking ring 32 can also be connected by screws or the like.

[0074] The structure of the brake assembly 4 will be described in detail as follows:

[0075] In an optional embodiment, as shown in Figure 5 The brake assembly 4 comprises a brake 41 and a guiding column 42, the brake 41 is connected with the supporting mechanism 1, one end of the guiding column 42 is connected with the limiting disc 31, and the other end extends into the brake 41 and is in sliding fit with the brake 41 along the axial direction of the supporting mechanism 1.

[0076] When the first driver 2 is actuated, the brake 41 releases the guiding column 42, and the limiting disc 31 can be axially moved under the driving of the first driver 2, when the limiting disc 31 is in place, the brake 41 locks the guiding column 42, and the axial position of the limiting disc 31 is locked.

[0077] The brake 41 can lock the guide column 42 by increasing the friction between the guide column 42, which can be directly purchased, and the brake 41 has a locking principle known in the art, and details are not described here to save space.

[0078] In an optional embodiment, as shown in Figure 9 The first driver 2 is configured as a plurality of first drivers 2, which are evenly distributed around the axis of the support mechanism 1, and the plurality of first drivers 2 act synchronously, so as to provide sufficient power for the locking mechanism and more stably drive the locking mechanism 3.

[0079] In an optional embodiment, as shown in Figure 9 The brake assembly 4 is configured as a plurality of brake assemblies 4, which are evenly distributed around the axis of the support mechanism 1, so as to reduce the test pressure borne by a single brake assembly 4 and effectively ensure the stability of the axial position of the locking mechanism 3 during the test, thereby ensuring that the test pressure meets the test requirements.

[0080] When the first driver 2 and the brake assembly 4 are both configured as a plurality of first drivers 2 and brake assemblies 4, as shown in Figure 9 The first driver 2 and the brake assembly 4 are alternately distributed around the axis of the support mechanism 1.

[0081] The structure of the support mechanism 1 is described in detail as follows:

[0082] As shown in Figure 10 The support mechanism 1 includes a housing 11, a top seat 12 and a bottom seat 13, and the two ends of the housing 11 are connected with the top seat 12 and the bottom seat 13, respectively. The top seat 12 can have an opening, and the top plate 312 of the locking mechanism 3 is located at the opening, and the first driver 2 and the brake assembly 4 are connected between the bottom seat 13 and the locking mechanism 3.

[0083] The second aspect of the embodiment of the utility model provides a docking device, and the second aspect of the embodiment of the utility model provides the docking device which comprises the center clamp.

[0084] The docking device provided by the second aspect of the utility model has the center clamp provided by the first aspect of the utility model, and thus has all the beneficial effects of the center clamp provided by the first aspect of the utility model.

[0085] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A center clamp characterized in that, The support mechanism (1), the first driver (2), the locking mechanism (3) and the brake assembly (4) are included, the locking mechanism (3) is arranged at one end of the support mechanism (1) in the axial direction, the locking mechanism (3) is provided with a locking part (321) for locking with a needle card carrier, the first driver (2) and the brake assembly (4) are connected between the support mechanism (1) and the locking mechanism (3), the first driver (2) is used to drive the locking mechanism (3) to move along the axial direction of the support mechanism (1), and the brake assembly (4) is used to lock the position of the locking mechanism (3) relative to the support mechanism (1).

2. The center clamp of claim 1, wherein, The locking mechanism (3) comprises a limiting disc (31), an inner locking ring (32) and a driving assembly (33). One side of the limiting disc (31) is provided with a limiting groove (311), the limiting groove (311) is sequentially provided with a first limiting surface (3111) and a second limiting surface (3112) along the axial direction of the limiting disc (31), and the other side of the limiting disc (31) is connected with the driving assembly (33), the first driver (2) and the brake assembly (4). The inner locking ring (32) is arranged in the limiting groove (311) in the axial direction of the inner locking ring (32), the locking part (321) is arranged in the radial direction of the inner locking ring (32), the locking part (321) has an unlocking state matched with the first limiting surface (3111) and a locking state matched with the second limiting surface (3112), the driving assembly (33) is connected with the inner locking ring (32), and the driving assembly (33) is used to drive the inner locking ring (32) to slide in the axial direction of the inner locking ring (32) relative to the limiting groove (311), so that the locking part (321) is switched between the unlocking state and the locking state.

3. The center clamp of claim 2, wherein, The first limiting surface (3111) is arranged close to the slot opening of the limiting groove (311), and the second limiting surface (3112) is arranged close to the slot bottom of the limiting groove (311). The first limiting surface (3111) gradually shrinks to the axis of the limiting disc (31) in the direction close to the second limiting surface (3112), and the second limiting surface (3112) is a cylindrical surface.

4. The center clamp of claim 3, wherein, A tapered hole (322) is arranged in the side wall of the limiting groove (311) of the inner locking ring (32), the tapered hole (322) extends in the radial direction of the inner locking ring (32), and the inner diameter of the tapered hole (322) gradually decreases in the direction gradually close to the axis of the inner locking ring (32). The locking part (321) is arranged in the tapered hole (322), when the locking part (321) is in the locking state, the locking part (321) abuts against the second limiting surface (3112) and partially protrudes from one end of the tapered hole (322) close to the axis of the inner locking ring (32), and when the locking part (321) is in the unlocking state, the locking part (321) is arranged in the tapered hole (322) in the extension direction of the tapered hole (322).

5. The center clamp of claim 2, wherein, The driving assembly (33) comprises a second driver (331) and a guide seat (332), the fixed end of the second driver (331) is connected to the side of the limiting disc (31) away from the inner locking ring (32), the power output end of the second driver (331) is connected with the guide seat (332), the guide seat (332) penetrates the limiting disc (31) and is connected with the inner locking ring (32), the guide seat (332) is in sliding fit with the limiting disc (31) along the axial direction of the inner locking ring (32), and the second driver (331) is used for driving the guide seat (332) to slide relative to the limiting disc (31) along the axial direction of the inner locking ring (32).

6. The center clamp of claim 5, wherein, The guide seat (332) comprises a connecting seat and a plurality of guide shafts (3322), the power output end of the second driver (331) is connected with the connecting seat, and the guide shafts (3322) penetrate the limiting disc (31) and are in sliding fit with the limiting disc (31) along the axial direction of the inner locking ring (32), and the two ends of the guide shafts (3322) are connected with the connecting seat and the inner locking ring (32) respectively.

7. The center clamp of claim 2, wherein, The limiting disc (31) comprises a top plate (312) and an outer locking ring (313) mounted on one side of the top plate (312), the other side of the top plate (312) is connected with the driving assembly (33), the first driver (2) and the brake assembly (4), and the inner wall of the outer locking ring (313) forms the limiting groove (311).

8. The center clamp of claim 2, wherein, The brake assembly (4) comprises a brake (41) and a guide column (42), the brake (41) is connected with the support mechanism (1), one end of the guide column (42) is connected with the limiting disc (31), the other end of the guide column (42) extends into the brake (41) and is in sliding fit with the brake (41) along the axial direction of the support mechanism (1), and the brake (41) is used for releasing or locking the guide column (42).

9. The center clamp of claim 1, wherein, The first driver (2) is configured as a plurality of first drivers (2), and the plurality of first drivers (2) are uniformly distributed around the axial direction of the support mechanism (1). And / or, the brake assembly (4) is configured as a plurality of brake assemblies (4), and the plurality of brake assemblies (4) are uniformly distributed around the axial direction of the support mechanism (1).

10. A docking device, characterized in that The center clamp comprises the center clamp according to any one of claims 1-9. The center clamp comprises the center clamp according to any one of claims 1-9.

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